U.S. patent application number 11/426389 was filed with the patent office on 2007-01-04 for air gun, air gun magazine, number-of-times-of-firing display, and air gun control method.
Invention is credited to Koichi Tsurumoto.
Application Number | 20070000483 11/426389 |
Document ID | / |
Family ID | 34746779 |
Filed Date | 2007-01-04 |
United States Patent
Application |
20070000483 |
Kind Code |
A1 |
Tsurumoto; Koichi |
January 4, 2007 |
Air Gun, Air Gun Magazine, Number-of-Times-of-Firing Display, and
Air Gun Control Method
Abstract
The present invention relates to an electronic control method
for an air gun in the form of a model gun, and that is capable of
easily detecting whether there are bullets in the magazine, and
preventing blank shooting operation. The air gun of this invention
comprises a method for prohibiting the shooting operation for the
air gun by receiving a detection signal indicating a state of no
bullets from a bullet-detection lever, which is located in a
magazine in which a plurality of bullets are stored, and that by
setting it in an air gun, continuously feeds said bullets into the
chamber of the air gun, and that detects whether there are any
bullets stored in the magazine.
Inventors: |
Tsurumoto; Koichi; (Tokyo,
JP) |
Correspondence
Address: |
SMITH HOPEN, PA
180 PINE AVENUE NORTH
OLDSMAR
FL
34677
US
|
Family ID: |
34746779 |
Appl. No.: |
11/426389 |
Filed: |
June 26, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/JP03/17053 |
Dec 26, 2003 |
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11426389 |
Jun 26, 2006 |
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Current U.S.
Class: |
124/73 ;
124/45 |
Current CPC
Class: |
F41A 19/01 20130101;
F41A 17/36 20130101; F41B 11/642 20130101; F41B 11/55 20130101;
F41B 11/57 20130101 |
Class at
Publication: |
124/073 ;
124/045 |
International
Class: |
F41B 11/00 20060101
F41B011/00 |
Claims
1. A magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds said bullets into a
chamber of said air gun, and comprising a bullet-detection lever
that detects whether there are any of said bullets stored inside
said magazine.
2. A magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds said bullets into a
chamber of said air gun, and comprising a bullet-detection lever
whose position moves according to whether there are any of said
bullets stored in said magazine.
3. A magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds said bullets into a
chamber of said air gun, and comprising a bullet-detection lever of
which part protrudes outward from the side surface of said
magazine, and that moves upward when there are said bullets stored
in said magazine, and moves downward when there are no bullets
stored in said magazine.
4. A magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds said bullets into a
chamber of said air gun, and comprising: a spring of which one end
is located at the bottom of said magazine, and the other end comes
in contact with a pressure member that presses said bullets; and a
bullet-detection lever of which part protrudes outward from the
side surface of said magazine, and where the position of the part
that protrudes outward from the side surface of said magazine is
changed by said pressure member when said spring reaches the very
top of is movable range.
5. An air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a magazine in which a plurality of
bullets are stored, and that by setting it in an air gun,
continuously feeds said bullets into a chamber of said air gun; a
bullet-detection means for detecting whether there are any of said
bullets stored in said magazine; and a means for receiving a
detection signal from said bullet-detection means indicating that
there are no bullets, and prohibiting the shooting operation.
6. The air gun of claim 5 wherein said means for prohibiting said
shooting operation is a means for turning OFF the motor power.
7. The air gun of claim 5 or claim 6 wherein said bullet-detection
means is a bullet-detection lever located in said magazine that
detects whether there are any bullets in said magazine, and is a
means that turns ON/OFF a bullet-detection switch and inputs the
ON/OFF state of said bullet-detection switch to a microcomputer
that determines the state.
8. An air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a magazine in which a plurality of
bullets are stored, and that by setting it in an air gun,
continuously feeds said bullets into a chamber of said air gun; a
bullet-detection means for detecting whether there are any of said
bullets stored in said magazine; a means for receiving a detection
signal from said bullet-detection means indicating that there are
no bullets, and prohibiting the shooting operation; and a means for
performing the bullet shooting operation when said bullet-detection
means detects that there are bullets when a trigger switch is ON,
and prohibiting the bullet shooting operation when said
bullet-detection means detects that there are no bullets when said
trigger switch is ON; so that even when the trigger switch is ON
and there are no bullets in said magazine, the shooting operation
is prohibited and blank shooting is prevented.
9. An air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a means for detecting a reference
position of a shooting operation; a means for starting said
shooting operation when it is detected that there are bullets in a
magazine and a trigger switch is ON; a means for stopping said
shooting operation when said reference position is detected and
said trigger switch is OFF; and a means for prohibiting said
shooting operation when it is detected that there are no bullets in
said magazine, regardless of the ON/OFF state of said trigger
switch.
10. An air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a means for detecting a reference
position of a shooting operation; a means for starting said
shooting operation when a trigger switch is ON; a means for
stopping said shooting operation when said reference position is
detected and it is detected that there are no bullets in a
magazine, regardless of the ON/OFF state of said trigger
switch.
11. An air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a means for detecting a reference
position of a shooting operation; a counter means for which the
maximum value N of the number of times bullets are shot when the
trigger switch is switched ON one time can be set arbitrarily; a
means for starting said shooting operation when said trigger switch
is switched ON; a subtraction means for subtracting 1 from said set
maximum value N when said reference position is detected; and a
means for stopping said shooting operation when said reference
position is detected and it is detected that there are no bullets
in a magazine, regardless of the subtraction result of said
subtraction means.
12. A number-of-bullets-shot-display apparatus comprising; a means
for counting the number of times bullets have been shot based on
the operation of a shooting mechanism that operates according to
shooting of bullets; and a means for displaying said counted number
of times bullets have been shot.
13. A number-of-bullets-shot-display apparatus comprising; a means
for counting the number of times bullets have been shot based on
the operation of a shooting mechanism that operates according to
shooting of bullets; and a means for calculating the number of
bullets remaining in a magazine by subtracting the said counted
number of times bullets have been shot from a preset number of
bullets in said magazine, and displaying the result.
14. A control method for an air gun that uses compressed air
generated by a piston to shoot bullets, comprising: a means for
detecting whether there are any of said bullets stored in a
magazine, and prohibiting a shooting operation when it is detected
that there are no bullets in said magazine.
15. The control method for an air gun of claim 14 where in said
means for prohibiting said shooting operation is executed by
turning OFF the motor power.
16. The control method for an air gun of claim 14 or claim 15
wherein detection of whether there are any said bullets is
performed by turning ON/OFF a bullet-detection switch by a
bullet-detection lever in said magazine, and inputting the ON/OFF
state of said bullet-detection switch to a microcomputer that
determines the state.
17. An air gun that uses compressed air generated by a piston to
shoot bullets, that: detects whether there are any of said bullets
stored in a magazine, and performs a bullet shooting operation when
there are bullets in said magazine and a trigger switch is switched
ON; and prevents blank shooting by prohibiting the bullet shooting
operation when there are no bullets in said magazine even when said
trigger switch is switched ON.
18. A control method for an air gun that uses compressed air
generated by a piston to shoot bullets, that: detects a reference
position of a shooting operation; starts said shooting operation
when it is detected that there are bullets in a magazine and a
trigger switch is switched ON; stops said shooting operation when
said reference position is detected and said trigger switch is
switched OFF; and prohibits said shooting operation when it is
detected that there are no bullets in said magazine, regardless of
the ON/OFF state of said trigger switch.
19. A control method for an air gun that uses compressed air
generated by a piston to shoot bullets, that: detects a reference
position of a shooting operation; starts said shooting operation
when a trigger switch is switched ON; and stops said shooting
operation when said reference position is detected and it is
detected that there are no bullets in a magazine, regardless of the
ON/OFF state of said trigger switch.
20. A control method for an air gun that uses compressed air
generated by a piston to shoot bullets, that: detects a reference
position of a shooting operation; arbitrarily sets a counter to the
maximum value N of the number of time bullets are shot when a
trigger switch is switched ON one time; starts said shooting
operation when said trigger switch is switched ON; subtracts 1 from
said set maximum value N when said reference position is detected;
and stops said shooting operation when said reference position is
detected and it is detected that there are no bullets in a
magazine, regardless of the subtraction result of said subtraction
means.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to an air gun in the form of a model
gun, and more particularly to electronic control of an air gun that
prevent blank shooting.
[0003] 2. Description of the Related Art
[0004] An air gun in the form of a model gun that is patterned
after an automatic rifle is used as a toy or for shooting practice.
Particularly, in the case of being used for shooting practice, it
is desired that the air gun have the same appearance and be capable
of being handled the same as a real gun. Prior art for this kind of
air gun has been disclosed in Japanese Examined Patent Publication
H7-43238.
[0005] In this prior art, by pulling the trigger, a motor drives a
pump comprising a piston and cylinder, and discharges compressed
air though a discharge hole, while at the same time a bullet is fed
in synchronization with this, and that bullet is shot. In this
prior art, the mechanism that shoots the bullet is electrically
powered so that it can be driven by a motor, however, the bullet
shooting mechanism is a mechanical mechanism such as a cam. Also,
switching between single-shot mode and repeating mode is performed
by a mechanical mechanism comprising a mechanical tappet arm or
switching lever. Moreover, the power to the motor is turned ON/OFF
by a mechanical contact switch. Also, in this prior art it is
possible to switch between single-shot mode and repeating mode by
switching a lever, and in the case of repeating mode, the motor
operates as long as the trigger is pulled, and the series of
operations related to repeating mode are repeatedly performed, and
by releasing the trigger, the operations stop.
[0006] In the aforementioned prior art, starting and stopping the
shooting operation was performed by turning ON/OFF a mechanical
switch to the power supply of the motor, so there was a problem in
reliability in that defective operation due to burnt contacts or
shorting occurs easily. Also, switching between single-shot mode
and repeating mode is performed by a mechanism comprising a
mechanical cam and lever, so defective operation occurs easily due
to wear or fatigue.
[0007] Moreover, in the repeating mode operation of this prior art,
it was not possible to control how many times the gun was shot.
[0008] Also, in this prior art, there was no way for checking
whether or not there were bullets in the magazine, and particularly
during continuous shooting, even after the last bullet was shot,
there was a problem in that in a state of having no bullets,
useless blank shooting continued.
[0009] In this prior art, the trigger was released at arbitrary
timing, so in accordance to this, the motor also stopped at
arbitrary timing. Therefore, there was a problem in that the
rotating shaft (sector gear) also stopped at an arbitrary position,
and stopped while still being meshed with the rack formed on the
piston. The following problems occur when the rotating shaft
(sector gear) stops while still being meshed with the rack:
[0010] (1) The air gun is left for a long period of time in the
stopped state with stress still being applied to the rotating shaft
and rack, which causes mechanical failure of the deceleration
mechanism and piston unit to occur.
[0011] (2) The air gun is left for a long period of time in the
stopped state when the spring compressed. Therefore, the spring
effect of the spring becomes weak.
[0012] (3) The air gun is stopped with stress still being applied
to the rotating shaft and rack, so the meshing between the rotating
shaft and rack cannot be easily released. Therefore, it is not
possible to easily open up the inside when performing internal
inspection such as during maintenance.
SUMMARY OF THE INVENTION
[0013] In order to solve the aforementioned problems, the object of
the present invention is to make it possible easily detect whether
there are any bullets in the magazine and to prevent blank
shooting.
[0014] The invention according to a first claim of the invention is
a magazine in which a plurality of bullets are stored, and that by
setting it in an air gun, continuously feeds the bullets into a
chamber of the air gun, and comprising a bullet-detection lever
that detects whether there are any of the bullets stored inside the
magazine.
[0015] The invention according to a second claim of the invention
is a magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds the bullets into a
chamber of the air gun, and comprising a bullet-detection lever
whose position moves according to whether there are any of the
bullets stored in the magazine.
[0016] The invention according to a third claim of the invention is
a magazine in which a plurality of bullets are stored, and that by
setting it in an air gun, continuously feeds the bullets into a
chamber of the air gun, and comprising a bullet-detection lever of
which part protrudes outward from the side surface of the magazine,
and that moves upward when there are the bullets stored in the
magazine, and moves downward when there are no bullets stored in
the magazine.
[0017] The invention according to a fourth claim of the invention
is a magazine in which a plurality of bullets are stored, and that
by setting it in an air gun, continuously feeds the bullets into a
chamber of the air gun, and comprising: a spring of which one end
is located at the bottom of the magazine, and the other end comes
in contact with a pressure member that presses the bullets; and a
bullet-detection lever of which part protrudes outward from the
side surface of the magazine, and where the position of the part
that protrudes outward from the side surface of the magazine is
changed by the pressure member when the spring reaches the very top
of is movable range.
[0018] The invention according to a fifth claim of the invention is
an air gun that uses compressed air generated by a piston to shoot
bullets, comprising: a magazine in which a plurality of bullets are
stored, and that by setting it in an air gun, continuously feeds
the bullets into a chamber of the air gun; a bullet-detection
method for detecting whether there are any of the bullets stored in
the magazine; and a method for receiving a detection signal from
the bullet-detection method indicating that there are no bullets,
and prohibiting the shooting operation.
[0019] The invention according to a sixth claim of the invention is
the air gun of claim 5 wherein the method for prohibiting the
shooting operation is a method for turning OFF the motor power.
[0020] The invention according to a seventh claim of the invention
is the air gun of claim 5 or claim 6 wherein the bullet-detection
method is a bullet-detection lever located in the magazine that
detects whether there are any bullets in the magazine, and is a
method that turns ON/OFF a bullet-detection switch and inputs the
ON/OFF state of the bullet-detection switch to a microcomputer that
determines the state.
[0021] The invention according to an eighth claim of the invention
is an air gun that uses compressed air generated by a piston to
shoot bullets, comprising: a magazine in which a plurality of
bullets are stored, and that by setting it in an air gun,
continuously feeds the bullets into a chamber of the air gun; a
bullet-detection method for detecting whether there are any of the
bullets stored in the magazine; a method for receiving a detection
signal from the bullet-detection method indicating that there are
no bullets, and prohibiting the shooting operation; and a method
for performing the bullet shooting operation when the
bullet-detection method detects that there are bullets when a
trigger switch is ON, and prohibiting the bullet shooting operation
when the bullet-detection method detects that there are no bullets
when the trigger switch is ON; so that even when the trigger switch
is ON and there are no bullets in the magazine, the shooting
operation is prohibited and blank shooting is prevented.
[0022] The invention according to a ninth claim of the invention is
an air gun that uses compressed air generated by a piston to shoot
bullets, comprising: a method for detecting a reference position of
a shooting operation; a method for starting the shooting operation
when it is detected that there are bullets in a magazine and a
trigger switch is ON; a method for stopping the shooting operation
when the reference position is detected and the trigger switch is
OFF; and a method for prohibiting the shooting operation when it is
detected that there are no bullets in the magazine, regardless of
the ON/OFF state of the trigger switch.
[0023] The invention according to a tenth claim of the invention is
an air gun that uses compressed air generated by a piston to shoot
bullets, comprising: a method for detecting a reference position of
a shooting operation; a method for starting the shooting operation
when a trigger switch is ON; a method for stopping the shooting
operation when the reference position is detected and it is
detected that there are no bullets in a magazine, regardless of the
ON/OFF state of the trigger switch.
[0024] The invention according to an eleventh claim of the
invention is an air gun that uses compressed air generated by a
piston to shoot bullets, comprising: a method for detecting a
reference position of a shooting operation; a counter method for
which the maximum value N of the number of times bullets are shot
when the trigger switch is switched ON one time can be set
arbitrarily; a method for starting the shooting operation when the
trigger switch is switched ON; a subtraction method for subtracting
1 from the set maximum value N when the reference position is
detected; and a method for stopping the shooting operation when the
reference position is detected and it is detected that there are no
bullets in a magazine, regardless of the subtraction result of the
subtraction method.
[0025] The invention according to a twelfth claim of the invention
is a number-of-bullets-shot-display apparatus comprising; a method
for counting the number of times bullets have been shot based on
the operation of a shooting mechanism that operates according to
shooting of bullets; and a method for displaying the counted number
of times bullets have been shot.
[0026] The invention according to a thirteenth claim of the
invention is a number-of-bullets-shot-display apparatus comprising;
a method for counting the number of times bullets have been shot
based on the operation of a shooting mechanism that operates
according to shooting of bullets; and a method for calculating the
number of bullets remaining in a magazine by subtracting the
counted number of times bullets have been shot from a preset number
of bullets in the magazine, and displaying the result.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 shows the air gun in the form of a model gun of this
invention that is patterned after an automatic rifle.
[0028] FIG. 2 is a drawing showing the shooting control unit of the
invention.
[0029] FIG. 3 is an enlarged view of the control circuit of the
invention.
[0030] FIG. 4 is a drawing showing section A-A of FIG. 3.
[0031] FIG. 5 is a drawing showing the electronic-control circuit
of the invention.
[0032] FIG. 6 is a drawing explaining the operation of the
invention from setting a bullet until the bullet is shot.
[0033] FIG. 7 is a drawing showing the control block of the
electronic-control circuit of the invention.
[0034] FIG. 8 is a drawing showing the control circuit shown in
FIG. 7 shown in more detail.
[0035] FIG. 9 is a flowchart of control performed for the
single-shot mode operation of the invention.
[0036] FIG. 10 is a drawing showing the open gun body of the
invention.
[0037] FIG. 11 is a flowchart of control performed for the
repeating mode operation of the invention.
[0038] FIG. 12 is a flowchart of control performed for N-repeating
mode operation of the invention.
[0039] FIG. 13 is a flowchart of control performed for the
single-shot mode operation of the invention.
[0040] FIG. 14 is a flowchart of control performed when switching
between the single-shot mode and repeating mode operations of the
invention.
[0041] FIG. 15 is a flowchart of control performed when switching
among the single-shot mode, repeating mode and N-repeating mode
operations of the invention.
[0042] FIG. 16 is another flowchart of control performed when
switching among the single-shot mode, repeating mode and
N-repeating mode operations of the invention.
[0043] FIG. 17 is yet another flowchart of control performed when
switching among the single-shot mode, repeating mode and
N-repeating mode operations of the invention.
[0044] FIG. 18 to FIG. 20 are yet another flowchart of control
performed when switching among the single-shot mode, repeating mode
and N-repeating mode operations of the invention.
[0045] FIG. 21 is a flowchart of the control performed when
counting the number of shootings in the single-shot mode operation
of the invention.
[0046] FIG. 22 is a flowchart of the control performed when
counting the number of shootings in the single-shot mode, repeating
mode and N-repeating mode operations of the invention.
[0047] FIG. 23(a), FIG. 23(b) and FIG. 23(c) are a front view, top
view and left side view of the gun magazine of the invention,
respectively.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0048] FIG. 1 shows an air gun in the form of a model gun that is
patterned after an automatic rifle.
[0049] First, each part of the air gun shown in FIG. 1 will be
explained. In the figure, 1 is the air gun body, 21 is a
cylindrical barrel through which a bullet passes when being shot,
and 3 is a trigger that is pulled when shooting the bullet. Also, 4
is a magazine, 5 is a gun grip, 6 is a gun stock, 7 is a hand-guard
liner, 8 is a hand carry and 9 is a hinge.
[0050] As shown in FIG. 23, the magazine 4 is constructed so that a
plurality of bullets 19 are stored inside it (details of the inside
are not shown), and a spring feeds the bullets 19 from a feed hole
59 that is located on the top surface of the magazine 4. On the
side surface of the magazine 4 there is a bullet-detection lever 58
that protrudes from the frame 60 and detects whether or not there
are any bullets 19, and when there are bullets in the magazine 4,
the bullet-detection lever 58 moves upward, and where there are no
bullets, it moves downward. This bullet-detection lever 58 comes in
contact with the pressure member of a bullet-detection switch that
is shown by the dashed line in FIG. 23, and it is possible for the
bullet-detection switch 41 shown in FIG. 3 to detect whether or not
there are any bullets in the magazine 4 according to the movement
of the bullet-detection lever 58. In other words, the pressure
member 42 of the bullet-detection switch is pressed downward by a
spring (elastic member not shown in the figure), and when the
bullet-detection lever 58 moves upward, it is pressed upward
against the spring force by the bullet-detection lever 58, however
when the bullet-detection lever 58 moves downward, the pressure
member 42 of the bullet-detection switch is pressed downward by the
spring force, and this presses the contact of the bullet-detection
switch 41 downward and closes the contact. The ON/OFF signal from
the contact of the bullet-detection switch 41 is input to the
control circuit, and is used to perform control for preventing
blank shooting described later.
[0051] Also, as will be described later, with the air gun of this
invention, it is possible to open the gun body 1 using the hinge 9
as a rotating shaft as shown in FIG. 10, and perform internal
maintenance.
[0052] FIG. 2 shows the inside of the gun body by a cut away view
of the control section that controls bullet shooting. In the
figure, 10 is a cylinder that houses a piston 12 inside, 11 is a
cylinder head that is located on one end of the cylinder 10 and in
which a continuous hole 57 is formed though which pressurized air
can pass, 12 is a piston that moves back and forth inside the
cylinder 10, and 13 is a piston head that is located on one end of
the piston 12. Also, 14 is an O-ring that is located around the
outside of the piston head 13 so that air cannot leak to the side
of the piston 12 from an air space 62 between the piston head 13
and cylinder head 11 that are surrounded by the cylinder 10.
Moreover, 15 is a spring that presses the piston 12 toward the left
side, 16 is a piston-movement-restriction member that restricts the
piston 12 from freely rotating around the center axis of the
cylinder 10 in order that a rack 18 can mesh properly with a sector
gear 25, 17 is center rod that is located so that the spring 15 is
located in line with the center axis of the piston 12, 18 is a rack
that is located on the bottom of the piston 12 and meshes with the
teeth 33 of the sector gear 25, 19 is a bullet, 20 is a chamber in
which that bullet 19 is fed, 21 is a cylindrical barrel through
which a shot bullet 19 passes, 22 is a motor that drives and
rotates the sector gear 25, 23 is a motor shaft, and 24 is a
deceleration gear. The operation of these parts indicated by
reference numbers 10 to 25 will be described later.
[0053] In the figure, 47 is an electronic-control circuit that
comprises a microcomputer 49 and other electronic parts. Also, 27
is a battery that is used as the drive power source for the motor
22, and is the control power source for the electronic-control
circuit 47. Moreover, 28 is a motor-power-supply-control unit that
turns the motor ON/OFF according to an ON/OFF instruction from the
microcomputer 49, and turns ON/OFF the power supplied to the motor
22 from the battery 27. There is a switch in the
motor-power-supply-control unit 28, and taking into consideration
the controllability and life of the switch, a semiconductor switch
is used for this switch, and particularly in this invention, power
saving is taken into consideration, so an MOS-FET (MOS field-effect
transistor) is used. In the figure, 29 and 30 are power lines for
supplying power to the motor 22 from the battery 27. Also, 31 is a
control line that transmits an ON/OFF signal from the
electronic-control unit 47 to the motor-power-supply-control unit
28. Moreover, 32 is a control-circuit-housing case that houses the
deceleration mechanism, which rotates the sector gear 25 to
decelerate the rotation from the motor 22, and the
electronic-control unit 47.
[0054] FIG. 3 is an enlarged view of the control circuit
portion.
[0055] In FIG. 3, 33 is the toothed section of the sector gear 25,
and 34 is the non-toothed section of the sector gear 25. The sector
gear 25 has a toothed section 33 and non-toothed section 34 in this
way, and the toothed section 33 meshes with the rack 18. When the
rack 18 is in a position that faces the non-toothed section, the
piston 12 becomes free from the sector gear 25 and is pressed
toward the side of the cylinder head by the pressure of the spring
15. In the figure, 35 is a first printed circuit board for the
control circuit on which the electronic-control circuit 47 is
located, and 36 is a second printed circuit board for the control
circuit. Also, 37 is a trigger switch, and this trigger switch 37
is turned ON by pulling the trigger 3. Moreover, 38 is signal line
for transmitting signals between the first printed circuit board 35
for the control circuit and second printed circuit board 36 for the
control circuit, and as shown in FIG. 5, is a conductor having
enough strength for maintaining the position and shape of the first
printed circuit board 35 for the control circuit and second printed
circuit board 36 for the control circuit. In the figure, 39 is a
photodiode that is paired with a phototransistor 44, and they form
a photo detector for detecting the rotation reference position of
the sector gear 25. Also, 40 is a hole for detecting the rotation
reference position of the sector gear. Moreover, 41 is a
bullet-detection switch for detecting whether or not there are any
bullets 19 in the magazine 4. In the figure, 42 is a pressure
member for the bullet-detection switch. When there are bullets 19
in the magazine 4, the bullet-detection lever 58 described above
presses the pressure member 42 of the bullet-detection switch
upward, and turns the bullet-detection switch 41 to the OFF state,
and when there are no more bullets 19 in the magazine 4, the
bullet-detection lever 58 moves downward, and a spring (elastic
member not shown in the figure) presses the pressure member 42 of
the bullet-detection switch downward and turns the bullet-detection
switch 41 to the ON state. In the figure, 43 is a first connector
mounted on the first printed circuit board 35 for the control
circuit, and it is connected to a signal line from a selector
switch 51 to be described later.
[0056] FIG. 4 is a sectional view of the section A-A of FIG. 3. In
the FIG. 44 is a phototransistor and it is paired with the
photodiode 39 to form a photo detector that detects the rotation
reference position of the sector gear 25. As shown in FIG. 4, the
photodiode 39 and phototransistor 44 face each other with the
sector gear 25 in the middle, and the sector gear 25 is capable of
rotating between the photodiode 39 and phototransistor 44, and when
positioned at the position of the rotation reference position of
the hole 40 shown in FIG. 3 for detecting the rotation reference
position of the sector gear 25, light from the photodiode 39 passes
through the hole 40 for detecting the rotation reference position
and is received by the phototransistor 44.
[0057] In the figure, 45 and 46 are installation holes for
attaching the control-circuit-housing case 32 to the gun body 1.
Here, 47 indicates the electronic-control circuit.
[0058] FIG. 5 shows the external appearance of the
electronic-control circuit 47. In the figure 48 is a second
connector that connects to the signal line that controls the
motor-power-supply-control unit 28. Also, 49 is a microcomputer.
The microcomputer 49 is mounted on this electronic-control circuit
47, and it controls the shooting operation to be described later.
Also mounted are the trigger switch 37, photodiode 39,
phototransistor 44, bullet-detection switch 41, first connector 43,
etc.
[0059] FIG. 5(a) is a bird's eye view of the overall
electronic-control circuit 47. FIG. 5(b) is a front view as seen
from the left front of FIG. 5(a), and FIG. 5(c) is a view as seen
from the direction of the arrow B in FIG. 5(b). The
electronic-control circuit 47 is positioned by fitting the side of
the first printed-circuit board 35 and second printed-circuit board
36 for the control circuit in a groove 55 formed in the sidewall of
the control-circuit-housing case 32 so that it slides in the groove
55. This positioning is important in order to set the relative
positions of the photodiode 39, phototransistor 44 and sector gear
25.
[0060] Next, the bullet shooting operation will be explained. FIG.
6 is a drawing for explaining the operation from after the bullet
19 is set until it is shot.
[0061] In FIG. 6, the cylinder 10 comprises a cylinder head 11 on
its right end section, and a piston 12 that fits inside it. A rack
18 is formed on the bottom section of the piston 12, and it is such
that it meshes with the toothed section 33 of the sector gear 25.
Also, one end of a spring 15 comes in contact with the bottom end
61 of the cylinder and is arranged so that the other end presses
the piston head 13 toward the right. The piston head 13 is formed
on the right end section of the piston 12, and when shooting a
bullet 19, air in a space 62 surrounded by the cylinder 10, piston
head 13 and cylinder head 11 is pushed outward in the direction of
the barrel 21 from a center hole 57 in the cylinder head 11. The
sector gear 25 is driven so that it decelerates the rotation of the
motor 22 by way of a bevel gear on the tip end of the motor shaft
23 and a deceleration gear 24.
[0062] FIG. 6(a) shows the state immediately after the sector gear
25 meshes with the rack 18, and shows the state immediately before
the piston 12 begins moving to the left. In FIG. 6 the sector gear
25 rotates to the left. At this time, a bullet 19 is supplied from
the magazine 4 (not shown in the figure) and is set inside the
chamber 20 that is located between the cylinder head 11 and barrel
21. Also, a photodiode 39 and phototransistor 44 are located as
shown in FIG. 6(a). At this time, a hole 40 for detecting the
rotation reference position of the sector gear 25 is located as
shown in FIG. 6(a), so the rotation reference position of the
section gear 25 is not detected.
[0063] FIG. 6(b) shows the state of the sector gear 25 meshed with
the rack 18, and furthermore shows the state of the sector gear 25
rotated against the pressure of the spring 15. At this time, the
piston 12 moves to the left and a space 62 is formed between it and
the cylinder head 11, and air indicated by the dashed arrow 56 is
supplied to this space 62. It is not shown in FIG. 6, however,
there is a check valve on the piston head 13, and when the piston
12 moves to the left side, air is supplied through this check valve
as shown by the dashed arrow 56 in FIG. 6(b). The check valve (not
shown in the figure) on the piston head 13 operates so that air is
prevented from flowing when the piston 12 moves to the right (see
FIG. 6(d)).
[0064] FIG. 6(c) shows the state when the meshing between the
sector gear 25 and the rack 18 has reached the end position, and is
the state immediately before the sector gear 25 rotates beyond this
point and the toothed section 33 no longer meshes with the toothed
section of the rack 18. Also, at this time, the hole 40 for
detecting the rotation reference position of the sector gear 25
rotates to the photo detector position that is formed by the
photodiode 39 and phototransistor 44, and this photo detector
detects the rotation reference position of the sector gear 25. When
a motor OFF signal for stopping the motor 22 is sent from the
electronic-control circuit 47 to the motor-power-supply-control
unit 28 according to this detection signal of the rotation
reference position, the power to the motor 22 is turned OFF, and
the motor decelerates and stops. When this happens, the sector gear
25 rotates a little due to the inertia of the motor 22,
deceleration-gear mechanism and friction loss and stops. How much
it rotates before it stops is determined according to the
relationship of the actual construction, so in FIG. 6(c) how to
show the positional relationship between the toothed section 33 of
the sector gear 25 and the hole 40 for detecting the rotation
reference position is difficult to find accurately by calculation,
so it is set experimentally.
[0065] FIG. 6(d) shows the state where the sector gear 25 has
stopped in this way. At this time, the non-toothed section 34 of
sector gear 24 faces the rack 18, and is in a state where the
sector gear 25 does not mesh with the rack 18 and is separated, and
the piston 12 is released from being pressed by the sector gear 25
and rack 18, and is pressed toward the right by the pressure force
of the spring 15. At this time, the air in the space 62 between the
piston head 13 and the cylinder head 11 is compressed, and is
discharged with great force from the center hole 57 in the cylinder
head 11 in the direction of the barrel 21. This pushes the bullet
19 with great energy in the right direction through the barrel 21,
and the bullet 19 is shot.
[0066] When the rotation reference position of the sector gear 25
is detected and the shooting operation is stopped in this way, it
is possible to always stop the non-toothed section 34 of the sector
gear 25 so that it faces the rack 18. Also, the piston 12 always
returns to the starting position of the shooting operation.
[0067] Even though the rotation reference position of the sector
gear 25 is detected as shown in FIG. 6(c), if the motor OFF signal
for stopping the motor 22 is not sent from the electronic-control
circuit 47 to the motor-power-supply-control unit 28, operation
continues and the operation shown in FIG. 6 is repeated, and the
shooting operation is performed.
[0068] Next, the construction of the electronic-control circuit 47
that controls the repeating mode operation will be explained.
[0069] FIG. 7 shows the control blocks of the electronic-control
circuit 47. In the figure, 49 is a microcomputer. Signals from the
bullet-detection switch 41, signals from the trigger switch 37,
signals from the single-shot mode/repeating mode and single-shot
mode/N-repeating mode switch 52 and selector switch 51, and
rotation-reference-position-detection signals from the
rotation-reference-position-detection unit 50 of the sector gear 25
are input to the microcomputer 49, and it outputs a motor ON/OFF
signal to the motor-power-supply-control unit 28 by way of an
amplifier 53. In the figure, 43 and 48 described above indicate
connectors. When a motor ON signal is output from the microcomputer
49, the semiconductor switch of the motor-power-supply-control unit
28 is turned ON, and the voltage from the battery 27 is applied to
the motor by way of the power-supply-control unit 28, and the motor
22 operates when power is supplied, however, when a motor OFF
signal is output from the microcomputer 49, power from the battery
27 is cut off by the power-supply-control unit 28 and the motor 22
stops. Also, in the figure, 50 is a
rotation-reference-position-detection unit that comprises a photo
detector made up of the photodiode 39, phototransistor 44, and the
sector gear 25. A detailed explanation of the operation of the
microcomputer 48 will be given later with reference to the
flowcharts given in FIG. 9 on.
[0070] FIG. 8 will be used to explain the construction of the
electronic-control circuit 47 in more detail.
[0071] In FIG. 8, 49 is a microcomputer, and it operates according
to a control voltage Vcc that is generated from a battery. Light
that is emitted from the photodiode 39 passes through the hole 40
for detecting the rotation reference position of the sector gear 25
and is received by the phototransistor 44. The output from the
phototransistor 44 is amplified by an operational amplifier 54 and
input to the microcomputer 49. When light emitted from the
photodiode 39 passes through the hole 40 for detecting the rotation
reference position of the sector gear 25 and is received by the
phototransistor 44, the phototransistor 44 is turned ON, and the
output from the operational amplifier 54 also changes, and a
rotation-reference-position-detection signal is obtained.
[0072] A contact signal from the trigger switch 37 is input to the
microcomputer 49, making it possible to detect whether the trigger
3 has been pulled. Also, a contact signal from the bullet-detection
switch 41 is input, making it possible to detect whether there are
any bullets 19 in the magazine 4.
[0073] Also, the single-shot mode/repeating mode and single-shot
mode/N-repeating mode switch 52 is constructed so that it is
possible to insert a jumper wire on the printed-circuit board of
the control circuit. For example, depending on whether a jumper
wire has been inserted in the switch 52, when a jumper wire has
been inserted, single-shot mode/repeating mode is designated, and
when a jumper wire is not inserted, it is possible to switch so
that single-shot mode/N-repeating mode is designated. Needless to
say, distinguishing between single-shot mode/repeating mode and
single-shot mode/N-repeating mode according to the state of the
jumper wire can be performed opposite that of the example described
above.
[0074] In the figure, 51 is a selector switch and is a 3-point
switch. This switch can switch to each respective contact position,
`single-shot mode`, `repeating mode` and `safety`. Here, when
`safety` is selected, the shooting operation is not performed even
when the trigger 3 is pulled.
[0075] Also, 53 is an amplifier that amplifies the motor ON/OFF
signal that is output from the microcomputer 49. The output from
the amplifier 53 is input to the gate of the MOS-FET of the
motor-power-supply-control unit 28. The MOS-FET functions as a
switch that switches the motor 22 voltage ON/OFF. Therefore, when
the MOS-FET is turned ON by the motor ON signal from the
microcomputer 49, voltage is applied to the motor 22 and power is
supplied from the battery 27 causing the motor 22 to operate. Also,
by turning OFF the MOS-FET in accordance to a motor OFF signal from
the microcomputer 49, power from the battery 27 is cut off and the
motor 22 stops operating. A deceleration gear 24 is formed on the
output shaft of the motor 22, and it rotates and drives the sector
gear 25.
First Embodiment of Control
[0076] Next, control flowcharts will be used to explain the bullet
shooting control in detail.
[0077] FIG. 9 shows a first embodiment of control, and is a
flowchart showing control of the single-shot mode operation.
[0078] First, control is started in step 100, and in step 101 a
check is performed to determine whether the trigger switch 37 has
been pressed. When the trigger switch 37 has not been pressed, a
watchdog timer WDT is cleared in step 102, and operation returns to
step 101.
[0079] When the microcomputer 49 is operating properly, this
watchdog timer WDT is periodically reset in order that an error
signal is not output, however, when the microcomputer 49 is not
operating properly, the watchdog timer WDT is no longer reset
periodically, but outputs an error signal and stops operation by
causing a safety apparatus to function, etc. The timer value of the
watchdog timer WDT is set to 1000 ms for example when the power to
the microcomputer 49 is initially turned ON. The technology for a
watchdog timer is well known, so an explanation of it will be
omitted here.
[0080] In step 101, when it is detected that the trigger switch 37
has been pressed, a check is performed in step 103 to determine
whether there is a bullet in the magazine 4. This check is executed
by inputting the signal from the bullet-detection switch 41 to the
microcomputer 49 and determining whether the signal is ON or OFF.
When there is a bullet 19 in the magazine 4, the bullet-detection
switch 41 is pressed upward by the pressure member 42 for the
pressure-detection switch, and turns the bullet-detection switch 41
OFF.
[0081] In step 103, when it is detected that there are no bullets
19 in the magazine 4, the operation advances to step 104 and the
power to the motor 22 is turned OFF. At this time, the
microcomputer 49 outputs a motor OFF signal to the signal amplifier
53, and the amplifier 53 amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives this signal, and by a switch cuts off the power
that is supplied from the battery 27 to a motor 22. A semiconductor
switch can be used for the switch of the motor-power-supply-control
unit 28. A bipolar transistor can be used as the semiconductor
switch, however, from the aspect of conserving energy, it is
preferred that a MOS-FET be used. By using a MOS-FET (MOS
field-effect transistor) it is possible to lengthen the life of the
battery 27.
[0082] Next, operation advances to step 105, and after waiting a
wait time of 20 ms, returns to step 101. This wait time is used to
stabilize control, and is not limited to 20 ms.
[0083] In step 103, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 106 and the motor
power is turned ON. At this time, the microcomputer 49 outputs the
motor-power ON signal to the signal amplifier 53, and the amplifier
53 amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives the signal and turns the MOS-FET signal ON, and
supplies power from the battery 27 to the motor 22. From this, the
motor 22 starts operating and rotates the sector gear 25 by way of
a deceleration mechanism such as a deceleration gear 24.
[0084] Next, in step 107, a check is performed to determine whether
the rotation reference position of the sector gear 25 was detected.
The rotation reference position is detected when the hole 40 for
detecting the rotation reference position of the sector gear 25
passes the position where a photo detector formed by a photodiode
39 and phototransistor 44 is located, and light that is emitted
from the photodiode 39 passes through the hole 40 for detecting the
rotation reference position of the sector gear 25 and is received
by the phototransistor 44, and then this signal is amplified by an
operational amplifier 54 and input to the microcomputer 49. When
the photo detector is not in the position of the hole 40 for
detecting the rotation reference position of the sector 25, the
phototransistor 44 does not receive light, so the
rotation-reference-position-detection signal is not input to the
microcomputer 49. As the motor 22 begins to operate, it is located
in a rotation position as shown in FIG. 6(d) or FIG. 6(a) just
before the sector gear 25 meshes with the rack 18, and since the
photo detector is not in the position of the hole 40 for detecting
the rotation reference position, the rotation reference position of
the sector gear 25 is not detected. When the rotation reference
position of the sector gear 25 is not detected, operation returns
to step 106, and step 106 and step 107 are repeated until the
rotation reference position of the sector gear 25 is detected.
[0085] In step 107, when the rotation reference position of the
sector gear 25 is detected, operation advances to step 108, and a
signal is output to turn the motor power OFF. At this time, the
hole 40 for detecting the rotation reference position of the sector
gear 25 is located in the position of the photo detector as shown
in FIG. 6(c). At this time, the microcomputer 49 outputs the motor
OFF signal to the signal amplifier 53, and the amplifier 53
amplifies the signal and sends it to the motor-power-supply-control
unit 28. The motor-power-supply-control unit 28 receives this
signal, and by way of a power switch, cuts off the power being
supplied from the battery to the motor 22.
[0086] The motor 22 whose power is cut off does not immediately
stop, but due to inertia rotates a certain amount to a position as
shown in FIG. 6(d) and then stops. It is important that the stopped
position of the sector gear 25 be a position where it does not mesh
with the rack 18. Taking into consideration performing maintenance
of the gun, it is preferred that construction be such that the gun
body 1 can be opened by rotating it around the hinge 9 as shown in
FIG. 10 so that the inside can be inspected, and with this
invention, it is possible to stop the sector gear 25 in a position
so that it does not mesh with the rack 18, so the gun can be easily
opened as shown in FIG. 10. In the state where the sector gear 25
meshes with the rack 18, stress is applied to the sector gear 25
and rack 18, so the gun cannot be easily opened, however in this
embodiment, this kind of state can be avoided.
[0087] The amount of rotation from after the rotation reference
position of the sector gear 25 has been detected until the motor 22
stops changes according to the motor 22 inertia, friction loss of
the gear mechanism, etc., however, the amount of rotation is
determined to the extent that the motor 22 inertia or friction loss
of the gear mechanism is determined, so the amount of rotation can
be measured using a test apparatus, and the hole 40 for detecting
the rotation reference position can be adjusted so that the sector
gear 25 stops in a position where it does not mesh with the rack
18. Also, the stopped position changes depending on fluctuation in
voltage from the battery 27, however, by detecting the battery 27
voltage and using a safety apparatus that stops operation when the
voltage drops below a threshold value, it is possible to further
keep the fluctuating range of the stopped position to a minimum. In
regards to voltage drop of the battery 27 voltage, it is possible
to install a display that will indicate that the battery 27 needs
recharging just before or just when the battery voltage reaches the
threshold value.
[0088] In step 108, after a signal is output to turn the motor
power OFF, operation advances to step 109 and a check is performed
to determine whether the trigger switch 37 is ON. When the trigger
switch 37 is ON, operation advances to step 110 and the watchdog
timer is reset, after which operation returns to step 109.
[0089] In step 109, when it is detected that the trigger switch 37
is OFF, operation advances to step 105, and after waiting a wait
time of 20 ms, operation returns to step 101 and the operation
described above continues.
[0090] With the operation shown in the flowchart described above,
it is possible to perform the single-shot mode operation by pulling
the trigger 3 one time, and so that the single-shot mode operation
is performed in the same way the next time the trigger 3 is pulled,
it is possible to perform the single-shot mode operation of
shooting one bullet each time the trigger 3 is pulled one time.
[0091] With this embodiment, single-shot mode operation is stopped
by detecting the rotation reference position of the sector gear 25,
so it is possible to stop operation at a position where the sector
gear 25 does not mesh with the rack 18. Therefore, it is possible
to easily open the gun body 1 as shown in FIG. 10 and easily
perform internal maintenance. Also, since it is possible to stop
operation at a position where the sector gear 25 does not mesh with
the rack 18, a state in which no stress is applied to the spring 15
is possible when storing the gun, and thus it is possible to
suppress degradation of the elastic force of the spring 15.
Moreover, since it is possible to stop operation at a position
where the sector gear 25 does not mesh with the rack 18, a state in
which no undesirable stress is applied to the rack 18 or piston 12
when storing the gun is possible, and thus it is possible to
improve reliability of the deceleration mechanism or piston unit.
Also, with this embodiment, it is possible to stop operation as
soon as there are no more bullets 19 in the magazine 4, so there is
no unnecessary blank shooting operation.
Second Embodiment of Control
[0092] FIG. 11 shows a second embodiment of control, and is a
flowchart of the control for the repeating mode operation.
[0093] First, control is started in step 120, and in step 121 a
check is performed to determine whether the trigger switch 37 is
pressed. When the trigger switch 37 is not being pressed, then in
step 122 a watchdog timer WDT is cleared and operation returns to
step 121.
[0094] In step 121, when it is detected that the trigger switch 37
is being pressed, then in step 123 a check is performed to
determine whether there are bullets 19 in the magazine 4. This
check is executed by inputting a signal from the bullet-detection
switch 41 to the microcomputer 49 and checking whether the signal
is ON or OFF. When there are bullets 19 in the magazine 4, the
pressure member 42 for the bullet-detection switch pushes the
bullet-detection switch 41 upward so that the switch is OFF.
[0095] In step 123 when it is detected that there are no bullets 19
in the magazine 4, operation advances to step 124 and the power to
the motor 22 is turned OFF. At this time, the microcomputer 49
outputs a motor-OFF signal to the signal amplifier 53, and the
amplifier 53 amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives the signal, and by way of a MOS-FET, cuts off the
power that is supplied to the motor 22 from the battery 27.
[0096] Next, operation advances to step 125, and after waiting a
wait time of 20 ms, operation returns to step 121. This wait time
is for stabilizing control and is not limited to 20 ms.
[0097] In step 123 when it is detected that there are bullets 19 in
the magazine 4, operation advances to step 126 and the power to the
motor is turned ON. At this time, the microcomputer 49 outputs a
motor-ON signal to the signal amplifier 53, and the amplifier
amplifies the signal and sends it to the motor-power-supply-control
unit 28. The motor-power-supply-control unit 28 receives the
signal, and turns ON the MOS-FET to supply power from the battery
27 to the motor 22. By doing this, the motor 22 begins to operate
and turns the sector gear 25 by way of a deceleration mechanism
comprising the motor shaft 23 and deceleration gear 24.
[0098] Next, in step 127 a check is performed to determine whether
the rotation reference position of the sector gear 25 has been
detected. When the rotation reference position of the sector gear
25 has not been detected, operation returns to the beginning of
step 127, and step 127 is repeated until the rotation reference
position of the sector gear 25 is detected.
[0099] In step 127, when the rotation reference position of the
sector gear 25 is detected, operation advances to step 128, and in
step 128 when the trigger switch 37 is not ON, operation advances
to step 129 and outputs a signal to turn the motor power OFF. At
this time, the hole 40 for detecting the rotation reference
position of the sector gear 25 is located in the position of the
photo detector as shown in FIG. 6(c). At this time, the
microcomputer 49 outputs a motor-OFF signal to the signal amplifier
53, and the amplifier 53 amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives the signal, and by way of a power switch, cuts off
the power that is supplied to the motor 22 from the battery 27.
[0100] In step 129, after outputting a signal to turn the motor
power OFF, operation advances to step 125, and after waiting a wait
time of 20 ms, operation advances to step 121 and the operation
described above continues.
[0101] In step 128, when the trigger switch 37 is ON, operation
advances to step 130, and a check is performed to determine whether
there are any bullets 19 in the magazine 4. When it is detected
that there are bullets 19 in the magazine 4, operation advances to
step 131, the watchdog timer WDT is cleared, and operation returns
to step 127.
[0102] In step 130, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 129 and turns the
power to the motor 22 OFF. In step 129, after outputting a signal
to turn the motor power OFF, operation advances to step 125, and
after waiting a wait time of 20 ms, operation returns to step 101,
after which the operation described above continues.
[0103] With this embodiment, it is possible to shoot bullets 19
continuously while the trigger 3 is pulled, and by releasing the
trigger 3 to stop the shooting operation, after the trigger 3 is
released, the rotation reference position of the sector gear 25 is
detected and the stop operation starts. Therefore, the final
stopped position of the repeating mode operation can be controlled
with good precision in the same was as in the single-shot mode
operation of the first embodiment, and it is possible to always
have the sector gear 25 stop in a state where it does not mesh with
the rack 18.
[0104] Therefore, as in the first embodiment, it is possible to
easily open the gun body 1 as shown in FIG. 10, and to easily
perform internal maintenance. Also, it is possible to stop
operation at a position where the sector gear 25 does not mesh with
the rack 18, so when storing the gun, a state in which there is no
stress applied to the spring 15 is possible, and thus it is
possible to suppress degradation of the elastic force of the spring
15. Moreover, since it is possible to stop operation at a position
where the sector gear 25 does not mesh with the rack 18, a state in
which no undesirable stress is applied to the rack 18 or piston 12
when storing the gun is possible, and thus it is possible to
improve reliability of the deceleration mechanism or piston unit.
Also, with this embodiment, it is possible to stop operation as
soon as there are no more bullets 19 in the magazine 4, so there is
no unnecessary blank shooting operation.
Third Embodiment of Control
[0105] FIG. 12 shows a third embodiment of control, and is a
flowchart for N-repeating mode control that is performed when
performing the repeating mode operation N times. N can be any
arbitrary positive integer 2 or greater. The inventors manufactured
a gun with N as 3, however it is not limited to this.
[0106] First, control is started in step 140, and in step 141 a
check is performed to determine whether the trigger switch 37 is
being pressed. When the trigger switch 37 is not being pressed,
then in step 122, the watchdog timer WDT is cleared and operation
returns to step 121.
[0107] In step 141, when it is detected that the trigger switch 37
is being pressed, then in step 143 a check is performed to
determine whether there are bullets in the magazine 4. This check
is executed by inputting a signal from the bullet-detection switch
41 to the microcomputer 49, and checking whether this signal is ON
or OFF. When there are bullets 19 in the magazine 4, the pressure
member 42 for the bullet-detection switch pushes the
bullet-detection switch 41 upward to turn the switch OFF.
[0108] In step 143, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 144, and the power
to the motor 22 is turned OFF. At this time, the microcomputer 49
outputs a motor-OFF signal to the signal amplifier 53, and the
amplifier 53 amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives this signal, and by way of a MOS-FET, cuts off the
power being supplied to the motor 22 from the battery 27.
[0109] Next, operation advances to step 145, and after waiting a
wait time of 20 ms, operation returns to step 141. This wait time
is for stabilizing control and is not limited to 20 ms.
[0110] In step 143, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 146, and a counter
CNT1 is set to N. N is the number of shootings, and is a positive
integer 2 or greater.
[0111] Next, operation advances to step 147, and the motor power is
turned ON. At this time, the microcomputer 49 outputs a motor-ON
signal to the signal amplifier 53, and the amplifier 53 amplifies
the signal and sends it to the motor-power-supply-control unit 28.
The motor-power-supply-control unit 28 receives this signal and
turns ON the MOS-FET, and supplies power from the battery 27 to the
motor 22. By doing this, the motor 22 begins to operate, and
rotates the sector gear 25 by way of a deceleration mechanism that
comprises a motor shaft 23, deceleration gear 24 or the like.
[0112] Next, in step 148, a check is performed to determine whether
the rotation reference position of the sector gear 25 has been
detected. When the rotation reference position of the sector gear
25 is not detected, operation returns to the start of step 148, and
step 148 is repeated until the rotation reference position of the
sector gear 25 is detected.
[0113] In step 148, when the rotation reference position of the
sector gear 25 is detected, operation advances to step 149, and in
step 149 a check is performed to determine whether there are
bullets 19 in the magazine 4. When it is detected that there are no
bullets 19 in the magazine 4, operation advances to step 129 and
the power to the motor 22 is turned OFF. In step 129, after a
signal to turn the motor power OFF is output, operation advances to
step 125, and after waiting a wait time of 20 ms, operation returns
to step 101 and the operation described above continues.
[0114] In step 149, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 151, and 1 is
subtracted from the value of the counter CNT1. Next, a check is
performed to determine whether the result became 0 after 1 was
subtracted. If the value is not 0, operation returns to step 148
and processing from step 148 to step 151 is repeated unit the value
becomes 0.
[0115] In step 151, when it is detected that the value of the
counter CNT1 has become 0, operation advances to step 152 and the
power to the motor 22 is turned OFF.
[0116] Next, operation advances to step 153, and when the trigger
switch 37 is ON, the watchdog timer WDT is cleared and operation
returns to the beginning of step 153.
[0117] When the trigger switch 37 is not ON, operation advances to
step 145, and after waiting a wait time of 20 ms, operation returns
to step 141, and the operation described above continues.
[0118] With this embodiment, it is possible to perform repeating
mode an arbitrary number of times N, and by releasing the trigger 3
during N-shot mode, it is possible to stop the N-shot mode
operation. Also, in the same way as in the single-shot mode
operation of the first embodiment, the last operation is capable of
detecting the rotation reference position of the sector gear 25 and
stopping. Therefore, as in the case of the single-shot mode
operation of the first embodiment, it is possible to accurately
control the final stopping position of the N-continuous operation,
and it is possible for the sector gear 25 to always stop in a state
in which it does not mesh with the rack 18. Moreover, as in the
first embodiment, it is possible to easily open the gun body 1 as
shown in FIG. 10, and to easily perform internal maintenance. Also,
it is possible to stop operation at a position where the sector
gear 25 does not mesh with the rack 18, so when storing the gun, a
state in which there is no stress applied to the spring 15 is
possible, and thus it is possible to suppress degradation of the
elastic force of the spring 15. Moreover, since it is possible to
stop operation at a position where the sector gear 25 does not mesh
with the rack 18, a state in which no undesirable stress is applied
to the rack 18 or piston 12 when storing the gun is possible, and
thus it is possible to improve reliability of the deceleration
mechanism or piston unit. Also, with this embodiment, it is
possible to stop operation as soon as there are no more bullets 19
in the magazine 4, so there is no unnecessary blank shooting
operation.
Fourth Embodiment of Control
[0119] FIG. 13 shows a fourth embodiment of control in which it is
possible to switch operation between single-shot mode and repeating
mode. The single-shot mode operation is based on the first
embodiment, and the repeating mode operation is based on the second
embodiment.
[0120] First, control is started in step 160, then in step 161 a
check is performed to determine whether the trigger switch 37 is
being pressed. When the trigger switch 37 is not being pressed, in
step 162, the watchdog timer WDT is cleared and operation returns
to step 161.
[0121] In step 161, when it is detected that the trigger switch 37
is being pressed, then in step 163 a check is performed to
determine whether there are any bullets 19 in the magazine 4. This
check is executed by inputting a signal from the bullet-detection
switch 41 to the microcomputer 49, and checking whether this signal
is ON or OFF.
[0122] In step 163, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 164, and the power
to the motor 22 is turned OFF. At this time, the microcomputer 49
outputs a motor-OFF signal to the signal amplifier 53, and the
amplifier amplifies the signal and sends it to the
motor-power-supply-control unit 28. The motor-power-supply-control
unit 28 receives the signal, and by way of a MOS-FET, cuts off the
power being supplied to the motor 22 from the battery 27.
[0123] Next, operation advances to step 165, and after waiting a
wait time of 20 ms, operation returns to step 161. This waiting
time is for stabilizing control, and is not limited to 20 ms.
[0124] In step 163, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 166, and a check is
performed to determine whether the operation is single-shot mode or
repeating mode.
[0125] Switching between single-shot mode and repeating mode is
performed by a selector switch 51. The selector switch 51 is
located on the side surface of the gun body 1 as shown in FIG. 1.
As shown in FIG. 8, the selector switch 51 is a switch that has
contacts on a single-shot mode side, repeating mode side and safety
side, and when it is switched to the single-shot mode side, +5V is
input to the microcomputer 49, and when it switched to the
repeating mode side, -5V is input to the microcomputer 49, and when
it is switched to the safety side, 0V is input to the microcomputer
49. From these three values, the microcomputer 49 determines
whether operation is single-shot mode or repeating mode. Shooting
is not performed when set to the safety side. Needless to say, the
combinations of these three values are not limited to those of this
embodiment.
[0126] In step 166, when it is determined that the operation is
single-shot mode, operation advances to step 167. Step 167 performs
processing of the single-shot mode operation of block S1 indicated
by the dashed line in FIG. 9. When leaving step 167, operation
returns to step 165, and after waiting a wait time of 20 ms,
operation returns to step 161, and the operation described above
continues.
[0127] In step 166, when it is determined that operation is
repeating mode, operation advances to step 168. Step 168 performs
processing of the repeating mode operation of block C1 indicated by
the dashed line in FIG. 11. When leaving step 168, operation
advances to step 165, and after waiting a wait time of 20 ms,
operation returns to step 161 and the operation described above
continues.
[0128] With this embodiment, it is possible to easily switch
between single-shot mode and repeating mode operation. Also, since
the single-shot mode operation is based on the first embodiment 1,
and the repeating mode operation is based on the second embodiment,
at the end of either the single-shot mode or repeating mode
operation, the rotation reference position of the sector gear 25 is
detected, and operation stops. Therefore, it is possible to obtain
the effect of both the first and second embodiments.
Fifth Embodiment of Control
[0129] FIG. 14 shows a fifth embodiment of control in which it is
possible to switch operation between single-shot mode and N-shot
mode operation. The single-shot mode operation is based on the
first embodiment and the N-shot mode operation is based on the
third embodiment. The operation flow shown in FIG. 14 is similar to
that of the fourth embodiment shown in FIG. 13. It differs in that
in the third embodiment shown in FIG. 13, step 166 determines
whether operation is single-shot mode or repeating mode, and step
168 executes the repeating mode process of block C1 indicated by
the dashed line in FIG. 11, however, in this embodiment shown in
FIG. 14, step 186 determines whether operation is single-shot mode
or N-shot mode, and step 188 executes the N-shot mode process of
block N1 indicated by the dashed line in FIG. 12. The switching
judgment for determining whether operation is single-shot mode or
N-shot mode in step 186 is executed by inputting the switching
state of the selector switch 51 to the microcomputer 49. The other
processing is the same as that shown in FIG. 13. In other words,
steps 160 to 165 and step 167 correspond to steps 180 to 185 and
step 187, respectively.
[0130] With this embodiment it is possible to easily switch between
single-shot mode operation and N-shot mode operation. Also, the
single-shot mode operation is based on the first embodiment and the
N-shot mode operation is based on the third embodiment, so after
the single-shot mode or N-shot mode operation is complete, the
rotation reference position of the sector gear 25 is detected and
operation stops. Therefore, it is possible to also obtain the same
effects as in the first and third embodiments.
Sixth Embodiment of Control
[0131] FIG. 15 shows a sixth embodiment of control in which it is
possible to switch operation among single-shot mode, repeating mode
and N-shot mode operation. The single-shot mode operation is based
on the first embodiment, the repeating mode operation is based on
the second embodiment, and the N-continuous operation is based on
the third embodiment. In the operation flow shown in FIG. 15, first
operation is determined to be either single-shot mode and repeating
mode operation, or single-shot mode and N-shot mode operation, then
depending on the result, the single-shot mode and repeating mode
operation of embodiment four is performed as shown by block A1 in
FIG. 13, or the single-shot mode and N-shot mode of the fifth
embodiment is performed as shown by block B1 in FIG. 14.
[0132] First, control starts in step 190, and in step 191 a check
is performed to determine whether the operation is single-shot mode
and repeating mode, or single-shot mode and N-shot mode. This is
performed by inputting a signal from the single-shot mode and
repeating mode/single-shot mode and N-shot mode selection unit 52
shown in FIG. 7 or FIG. 8 to the microcomputer 49, and determining
the set state. In step 191, when it is determined that operation is
single-shot mode and repeating mode, operation advances to step
192, and the single-shot mode and repeating mode operation of
embodiment 4 shown by block A1 in FIG. 13 is performed. In step
191, when it is determined that operation is single-shot mode and
N-shot mode, operation advances to step 193, and the single-shot
mode and N-shot mode operation of embodiment 5 shown by block B1 in
FIG. 14 is performed. Determining in block A1 or block B1 whether
operation is single-shot mode or repeating mode is performed by the
microcomputer 49 determining the state of the selection switch 51
the same way as in embodiments 4 and 5.
[0133] With this embodiment, ultimately it is possible to switch
operation among single-shot mode, repeating mode and N-shot mode.
Also, since the single-shot mode operation is based on the first
embodiment, the repeating mode operation is based on the second
embodiment and the N-shot mode operation is based on the third
embodiment, regardless of whether single-shot mode, repeating mode
or N-shot mode is selected, operation ends by detecting the
rotation reference position of the sector gear 25 and stopping.
Therefore, it is possible to obtain the effect of the first thru
fifth embodiments as well.
Seventh Embodiment of Control
[0134] FIG. 16 shows a seventh embodiment of control in which it is
possible to switch operation among single-shot mode, repeating
mode, and N-shot mode. The aspect that the single-shot mode
operation is based on the first embodiment, the repeating mode
operation is based on the second embodiment and the N-shot mode
operation is based on the third embodiment is the same as in the
sixth embodiment.
[0135] In the operation flow shown in FIG. 16, first a check is
performed to determine the ON/OFF state of the trigger switch 37,
and a check is performed to determine whether there are any bullets
19 in the magazine 4, and then switching is performed to select the
single-shot mode, repeating mode or N-shot mode operation.
[0136] First, control starts in step 200, and in step 201 a check
is performed to determine whether the trigger switch 37 is being
pressed. When the trigger switch 37 is not being pressed, in step
202 the watchdog timer WDT is cleared and operation returns to step
201.
[0137] In step 201 when it is detected that the trigger switch 37
is being pressed, then in step 203 a check is performed to
determine whether there are any bullets 19 in the magazine 4. This
check is performed by inputting a signal from the bullet-detection
switch 41 to the microcomputer 49 and determining whether the
signal is ON or OFF.
[0138] In step 203, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 204 and power to
the motor 22 is turned OFF.
[0139] Next, operation advances to step 205, and after waiting a
wait time of 20 ms, operation returns to step 101.
[0140] In step 203, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 206 and a check is
performed to determine which of single-shot mode, repeating mode
and N-shot mode is selected. This is executed by determining the
switching state of a 3-contact selection switch (not shown in the
figure). Depending on the determination result in step 206, the
processing of step 207, 208 or 209 is executed. Step 207 is the
processing of block S1 shown by the dashed line in FIG. 9, step 208
is the processing of block C1 shown by the dashed line in FIG. 11,
and step 209 is the processing of block N1 shown by the dashed line
in FIG. 12.
[0141] The operation flow shown in FIG. 16 is simplified so that
processing of checking of the ON/OFF state of the trigger switch
37, and the determining whether there are bullets 19 in the
magazine 4 that is common in the embodiments 1 to 3 are lumped
together. Also, in the operation flow shown in FIG. 15, the aspect
of switching among the single-shot mode, repeating mode and N-shot
mode operation is the same as in the sixth embodiment. In the sixth
embodiment, single-shot mode and repeating mode were handled as one
large block, and single-shot mode and N-shot mode were handled as
another large block, and in the case of this method of handling,
operation was selected by using a single-shot mode and repeating
mode/single-shot mode and N-shot mode selection unit 52 and
selection switch 51 as shown in FIG. 7 or FIG. 8. However, in this
seventh embodiment single-shot mode, repeating mode or N-shot mode
operation is selected by a 3-contact switch, which is preferable.
Also, the switch for determining switching can be one 3-contact
switch that switches among the single-shot mode, repeating mode and
N-shot mode operation.
[0142] With this seventh embodiment, ultimately it is possible to
switch operation among single-shot mode, repeating mode or N-shot
mode. Also, since the single-shot mode operation is based on the
first embodiment, the repeating mode operation is based on the
second embodiment and the N-shot mode operation is based on the
third embodiment, regardless of whether single-shot mode, repeating
mode or N-shot mode is selected, operation ends by detecting the
rotation reference position of the sector gear 25 and stopping.
Therefore, it is possible to obtain the effect of the first thru
fifth embodiments as well.
Eighth Embodiment of Control
[0143] FIG. 17 shows an eighth embodiment of control in which it is
possible to switch among single-shot mode, repeating mode and
N-shot mode operation. The aspect that the single-shot mode
operation is based on the first embodiment, the repeating mode
operation is based on the second embodiment and the N-shot mode
operation is based on the third embodiment is the same as in
embodiments 6 and 7.
[0144] In the operation flow shown in FIG. 17, repeating mode and
N-shot mode are first lumped together as repeating mode and
separated from single-shot mode, and then repeating mode and N-shot
mode are separated.
[0145] First, control starts in step 220, then in step 221 a check
is performed to determine whether the trigger switch 37 is being
pressed. When the trigger switch 37 is not being pressed, then in
step 222 the watchdog timer WDT is cleared and operation returns to
step 221.
[0146] In step 221, when it is detected that the trigger switch 37
is being pressed, then in step 223 a check is performed to
determine whether there are any bullets 19 in the magazine 4. This
check is executed by inputting a signal from the bullet-detection
switch 41 to the microcomputer 49 and determining whether the
signal is ON or OFF.
[0147] In step 223, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 224 and the power
to the motor 22 is turned OFF.
[0148] Next, operation advances to step 225, and after waiting a
wait time of 20 ms, operation returns to step 221.
[0149] In step 223 when it is detected that there are bullets 19 in
the magazine 4, operation advances to step 226 and determines
whether the operation is single-shot mode or repeating mode/N-shot
mode. This determination can be executed by using a selector switch
as in FIG. 7 and FIG. 8 and having the microcomputer 49 determine
the switching state.
[0150] In step 226, when operation is determined to be single-shot
mode, operation advances to step 227 and the processing block S1
shown by the dashed line in FIG. 9 is executed. This is the
processing flow for performing the single-shot mode operation.
[0151] In step 226, when operation is determined to be repeating
mode/N-shot mode, operation advances to step 228, and a check is
performed to determine whether operation is repeating mode or
N-shot mode. This check is performed by using the single-shot
mode/repeating mode and single-shot mode/N-shot mode switch 52
shown in FIG. 7 and FIG. 8 and having the microcomputer 49
determine the switching state. In step 228, when operation is
determined to be repeating mode, operation advances to step 229 and
the processing of block C1 shown by the dashed line in FIG. 11 is
executed. This is the processing flow that performs the repeating
mode operation. Also, in step 228, when operation is determined to
be N-shot mode, operation advances to step 230 and the processing
of block N1 shown in FIG. 12 is executed. This is the processing
flow that performs the N-shot mode operation.
[0152] As in the case of the seventh embodiment, in this eighth
embodiment operation flow is simplified so that processing of
checking the ON/OFF state of the trigger switch 37 and checking
whether there are any bullets 19 in the magazine 4, which is common
with other embodiments, are lumped together and performed.
[0153] With this eighth embodiment, ultimately it is possible to
switch operation among single-shot mode, repeating mode or N-shot
mode. Also, since the single-shot mode operation is based on the
first embodiment, the repeating mode operation is based on the
second embodiment and the N-shot mode operation is based on the
third embodiment, regardless of whether single-shot mode, repeating
mode or N-shot mode is selected, operation ends by detecting the
rotation reference position of the sector gear 25 and stopping.
Therefore, it is possible to obtain the effect of the first thru
fifth embodiments as well.
Ninth Embodiment of Control
[0154] FIGS. 18 to 20 show a ninth embodiment of control. Operation
will be explained with reference to the drawings.
[0155] Control starts in step 240 shown in FIG. 18, after which
operation advances to step 241 to perform initial setting. Here,
the initial value of the watchdog timer that will be used in the
following processing is set to 1000 ms, and processing is performed
to turn the power to the motor 22 OFF. As previously stated, the
initial value of the watchdog timer is not limited to 1000 ms.
Moreover, the reason for performing the process of turning the
power to the motor 22 at the beginning is to first set the motor 22
in a stopped state.
[0156] Next, operation advances to step 242 and a check to
determine whether the operation is single-shot mode/repeating mode,
or single-shot mode/N-shot mode is performed. This check is
performed by using the single-shot mode/repeating mode and
single-shot mode/N-shot mode switch 52, and having the
microcomputer 49 determine the switching state.
[0157] In step 242, when operation is determined to be single-shot
mode/repeating mode, operation advances to step 243 shown in FIG.
19. In step 243, a check is performed to determine whether the
trigger switch 37 is being pressed. When the trigger switch 37 is
not being pressed, in step 244 the watchdog timer WDT is cleared
and operation advances to step 243.
[0158] In step 243 when it is detected that the trigger switch 37
is being pressed, operation advances to step 245 and a check is
performed to determine whether operation is single-shot mode or
repeating mode. This check can be executed by inputting the
switching state of the selector switch 51 to the microcomputer 49.
In step 245, when it is determined that operation is single-shot
mode, operation advances to step 246 and a check is performed to
determine whether there are any bullets 19 in the magazine 4. This
check is performed by inputting a signal from the bullet-detection
switch 41 to the microcomputer 49, and determining whether the
signal is ON or OFF. When there are bullets 19 in the magazine 4,
the pressure member 42 for the bullet-detection switch pushes the
bullet-detection switch 41 and turns the switch ON.
[0159] In step 246, when it is detected that there are no bullets
19 in the magazine 4, operation advances to step 249 and the power
to the motor 22 is turned OFF.
[0160] Next, operation advances to step 248, and after waiting a
wait time of 20 ms, operation returns to step 243.
[0161] In step 246, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 247. This step 247
indicates the single-shot mode process of block S1 shown by the
dashed line in FIG. 9. After leaving the processing of step 247,
operation advances to step 248, and after waiting a wait time of 20
ms, operation returns to step 243.
[0162] In step 245, when operation is determined to be repeating
mode, operation advances to step 250 and a check is performed to
determine whether there are any bullets 19 in the magazine 4. In
step 250, when it is detected that there are no bullets 19 in the
magazine 4, operation advances to step 249 and the power to the
motor 22 is turned OFF, after which operation advances to step 248,
and after waiting a wait time of 20 ms, operation returns to step
243.
[0163] In step 250, when it is detected that there are bullets 19
in the magazine 4, operation advances to step 251. This step 251 is
the repeating mode process of block C1 shown by the dashed line in
FIG. 11. After leaving the processing of step 251, operation
advances to step 248, and after waiting a wait time of 20 ms,
operation returns to step 243.
Tenth Embodiment of Control
[0164] FIG. 21 and FIG. 22 show a tenth embodiment of control in
which it is possible to count the number of bullets that have been
shot.
[0165] FIG. 21 is a drawing in which a counter is used in the
single-shot mode operation flow shown in FIG. 9 that counts the
number of bullets 19 that have been shot. Similarly, it is possible
to use a counter in the repeating mode operation flow shown in FIG.
11, and in the N-shot mode operation flow shown in FIG. 12. The
counter in the case of repeating mode and N-shot mode is the same
as that shown in FIG. 21, so no drawings are provided. Moreover,
FIG. 22 shows a flowchart of the process for counting the number of
bullets 19 that have been shot in single-shot mode, repeating mode
or N-shot mode. Operation will be explained below with reference to
FIG. 21 and FIG. 22.
[0166] In FIG. 21 the same reference numbers will be used for parts
that are the same as in FIG. 9.
[0167] First, control starts in step 100, and in step 300 the value
n1 of the counter C2 is reset to 0. Next, operation advances to
step 101, and processing up to step 107 is the same as in the first
embodiment shown in FIG. 9. Also, in step 107 a check is performed
for determining whether the rotation reference position of the
sector gear 25 has been detected.
[0168] In step 107, when the rotation reference position of the
sector gear 25 is detected, operation advances to step 301. Here, 1
is added to the value n1 of the counter C2. In the case of
single-shot mode, only one bullet 19 has been shot, so the value n1
of the counter C2 becomes n1=0+1.
[0169] Next, operation advances to step 108 and outputs a signal to
turn the power to the motor 22 OFF. Passing steps 109, 110 and 105,
operation returns to step 101.
[0170] Furthermore, when the trigger switch is ON, the operation
described above is repeated, and 1 is further added to the value n1
of the counter C2 so that n1=1+1=2.
[0171] Each time the trigger switch 37 goes ON and a bullet 19 is
shot, the value n1 of the counter C2 is counted up. In other words,
after a bullet 19 is shot, correspondingly the value n1 of the
counter C2 is counted up.
[0172] Similarly, in the case of repeating mode, it is possible to
count the number of bullet 19 that have been shot. In other words,
taking the counter to be C3 in the case of repeating mode, as shown
in FIG. 21, after step 120 in FIG. 11, the counter C3 is reset to
0, and after step 127, the value of the counter C3 is counted up
one at a time. This case is for repeating mode, so the loop from
step 127 to step 131 is continued and bullets 19 are shot, and each
time the process goes through step 127, the counter counts up by 1.
Therefore, it is possible to accurately count the number of bullets
19 that were continuously shot.
[0173] Also, similarly, in the case of N-shot mode as well, it is
possible to count the number of bullets that have been shot. In
other words, by taking the counter in the case of N-shot mode to be
C4, as shown in FIG. 21, after step 140 in FIG. 12, the counter C4
is reset to 0, and after step 148, the value of the counter C4 is
counted up 1 at a time. This case is for N-shot mode, so the loop
from step 127 to step 131 is continued and bullets 19 are shot, and
each time the process goes through step 127, the counter counts up
by only 1, and the number is counted up until it reaches a maximum
of N shots shot. Therefore, it is possible to accurately count the
number of bullets 19 that were continuously shot in the case of
N-shot mode.
[0174] The embodiment shown in FIG. 22 is another form of
embodiment 7 of single-shot mode, repeating mode and N-shot mode
shown in FIG. 16, in which the total number of bullets 19 shot in
single-shot mode, repeating mode or N-shot mode operation is found
and displayed.
[0175] First, control starts in step 200, and in step 400 the
values n1, n2 and n3 of the counters C2, C3 and C4 are reset to 0.
Next, operation advances to step 201 and the process to step 406 is
the same as in the seventh embodiment shown in FIG. 16. In step 206
a check is performed to determine which of single-shot mode,
repeating mode and N-shot mode is selected, and then the processing
of steps 401, 402 and 403 is executed. Step 401 is the processing
of block S2 shown by the dashed line of FIG. 21. Step 402 is a
process in which the counter C3 is used in the repeating mode
operation previously explained, and step 403 is a process in which
the counter C4 is used in the N-shot mode operation previously
explained, and more specifically, C2 is the block C1 in FIG. 11 in
which the counter C3 is inserted after step 127, and N2 is the
block N1 shown in FIG. 12 in which the counter C4 is inserted after
step 148.
[0176] After passing the processing of steps 401 to 403, step 404
is executed. Step 404 calculates and displays the total of n1 to n3
that were counted by the counters C2 to C4 in steps 401 to 403. The
display is not shown in the figure, however, it can be easily made
using control technology that uses a normal microcomputer, for
example a liquid-crystal display or the like can be used, and it is
possible to use this liquid-crystal display to display the total
value of the number of bullets 19 shot. In this embodiment,
separate counters were used for single-shot mode, repeating mode
and N-shot mode, making it possible to perform counting for
single-shot mode, repeating mode and N-shot mode, respectively,
however, it is also possible to perform counting using a common
counter. In this case, regardless of the route, single-shot mode,
repeating mode or N-shot mode passed, the total value for
single-shot mode, repeating mode and N-shot mode is counted. Step
404 is not necessary in this case, and it is possible for step 400
to just reset the common counter.
[0177] Also, the count value described above counted the number of
bullets 19 shot, however, by initially setting the number bullets
19 loaded and counting down as the bullets 19 are shot, it is
possible to know how many bullets 19 are remaining. In this case,
it is possible to input a numerical value, however, since the
number of new bullets 19 in a magazine 4 is known, by detecting
that value when a magazine is set, it is possible to automatically
set that value as the initial value of the number of bullets 19.
When the initial value is set, then the initial value when a new
magazine 4 is set is stored in internal memory. Also, when it is
desired to set an arbitrary value as the initial setting, it is
possible to use key input for entering numerical values. This key
input is not shown in the figures, however, could be easily formed
by using control technology that uses a normal microcomputer.
[0178] In the tenth embodiment described above, the means of
counting the number of bullets 19 shot was performed by having the
photo detector count the number of times the rotation reference
hole on the sector gear 25 passes, however, the means of counting
is not limited to this. For example, it is possible to perform the
same counting by counting the movement of the piston 12 or hammer
that goes through one cycle in correspondence to the operation of
shooting one bullet 19.
[0179] It is preferred that the ON/OFF state of the trigger switch
37, bullet-detection switch 41, selector switch 51 and single-shot
mode/repeating mode and single-shot mode/N-shot mode switch 52
explained in the various embodiments above be determined according
to the fail-safe method, however it is not limited to this. The
ON/OFF states can be opposite this, and what is important is that
it be possible to determine the switch state.
[0180] Also, the electronic-control circuit and control flow are
not limited to that explained above, and can be changed within the
main scope of the invention.
[0181] Also, in the explanation above, a free run stop occurred
after the rotation reference position of the sector gear 25 was
detected. This means was used because inexpensive construction of
the invention was taken into consideration, however if expensive
construction is allowable, it is also possible to employ a
servomotor as the means for positioning the sector gear 25.
[0182] Moreover, as mentioned above, it is possible for the value N
in N-shot mode to be set to any arbitrary positive integer 2 or
greater. The invention manufactured a gun with N as 3, however the
invention is not limited to this.
INDUSTRIAL APPLICABILITY
[0183] This invention can be used in the place of a real gun for
shooting practice or maintenance training. Also, it can be used as
a model gun for a toy.
[0184] Also, with this embodiment, in any shooting operation it is
possible to easily detect whether there are any bullets in the
magazine, and so it is possible to prevent blank shooting.
* * * * *