U.S. patent application number 10/694054 was filed with the patent office on 2004-05-13 for toy gun.
This patent application is currently assigned to WESTERN ARMS. Invention is credited to Kunimoto, Keiichi.
Application Number | 20040089280 10/694054 |
Document ID | / |
Family ID | 32089525 |
Filed Date | 2004-05-13 |
United States Patent
Application |
20040089280 |
Kind Code |
A1 |
Kunimoto, Keiichi |
May 13, 2004 |
Toy gun
Abstract
To avoid the situation, in which a gas pressure to be used for
shooting a bullet from a loading chamber is partially lost, a toy
gun in which a paint bullet charged in the loading chamber may be
reliably shot with gas under a relatively low pressure is provided.
A gas flow control mechanism is arranged movably with respect to a
movable member and forms a first gas passage for guiding the gas
into the loading chamber and a second gas passage for guiding the
gas to pressure receiving portions. For a period in which gas
supply controllers take a gas supply state as the movable member
advances, the gas flow control mechanism transfers from a state, in
which the gas passage is opened whereas the gas passage is closed
to supply the gas to the loading chamber through the gas passage,
to a state, in which the gas passage is closed whereas the gas
passage is opened to apply the gas to the pressure receiving
portions through the gas passage, so that the movable member is
moved back and forth thereby to make preparations for supplying the
ballet P from a magazine to the loading chamber.
Inventors: |
Kunimoto, Keiichi;
(Shibuya-ku, JP) |
Correspondence
Address: |
NIXON PEABODY, LLP
401 9TH STREET, NW
SUITE 900
WASINGTON
DC
20004-2128
US
|
Assignee: |
WESTERN ARMS
Tokyo
JP
|
Family ID: |
32089525 |
Appl. No.: |
10/694054 |
Filed: |
October 28, 2003 |
Current U.S.
Class: |
124/76 ;
124/73 |
Current CPC
Class: |
F41B 11/723
20130101 |
Class at
Publication: |
124/076 ;
124/073 |
International
Class: |
F41B 011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 30, 2002 |
JP |
2002-315558 |
Claims
What is claimed is:
1. A toy gun comprising: a frame including a barrel, a loading
chamber formed in said barrel, a magazine for holding bullets to be
charged in said loading chamber, and a trigger; a movable member
arranged with a pressure receiving portion in said frame and made
movable in a first direction toward said loading chamber and in a
second direction opposed to the first direction; a drive mechanism
for moving said movable member in said first direction in response
to the operation of said trigger; a gas supply controller connected
to a gas outlet passage for taking a gas supply state, in which gas
is supplied, as said movable member moves in said first direction;
and a gas flow control mechanism arranged movably with respect to
said movable member and forming a first gas passage for guiding the
gas into said loading chamber and a second gas passage for guiding
the gas to said pressure receiving portion, whereby, for a period
in which said gas supply controller takes said gas supply state as
said movable member moves in said first direction, said gas flow
control mechanism transfers from a first state, in which said first
gas passage is opened whereas said second gas passage is closed to
supply the gas obtained in said gas outlet passage to said loading
chamber through said first gas passage, to a second state, in which
said first gas passage is closed whereas said second gas passage is
opened to apply the gas obtained in said gas outlet passage to said
pressure receiving portion through said second gas passage, so that
said movable member is moved in said second direction thereby to
make preparations for supplying the ballet from said magazine to
said loading chamber.
2. A toy gun according to claim 1, wherein the bullets to be held
in the magazine are paint containing bullets for discharging paint
when crushed.
3. A toy gun according to claim 1, wherein the movable member moves
in the second direction while forming a variable capacity pressure
chamber between the pressure receiving portion and the gas flow
control mechanism.
4. A toy gun according to claim 1, wherein the gas flow control
mechanism is constructed to include: a gas passage forming member
for forming the first gas passage and the second gas passage; and a
movable valve arranged movably in said gas passage forming member
for taking selectively a position to open said first gas passage
and to close said second gas passage and a position to close said
first gas passage and to open said second gas passage.
5. A toy gun according to claim 1, wherein the gas supply
controller includes: a gas chamber, into which the gas from the
outside is introduced; and a control valve for taking, selectively
according to the position of the movable member, a closed state to
block the gas flow from said gas chamber to the gas outlet passage
and an open state to establish the gas flow from said gas chamber
to said gas outlet passage.
6. A toy gun according to claim 1, wherein said gas supply
controller includes: an accumulation chamber for reserving the gas
charged; and a control valve for taking, selectively according to
the position of the movable member, a closed state to block the gas
flow from said accumulation chamber to the gas outlet passage and
an open state to establish the gas flow from said accumulation
chamber to said gas outlet passage.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a toy gun, in which the
shooting of bullets charged in a loading chamber and the automatic
supply of the loading chamber with the bullets are caused by the
action of a gas pressure and, more particularly, in which the
bullets to be charged in the loading chamber and shot are
exemplified by paint containing bullets for discharging paint when
crushed.
[0003] 2. Description of the Related Art
[0004] In the field of a model gun called the toy gun (or air soft
gun) in which a bullet is short from a barrel in accordance with
the operation of a trigger and in which a slider arranged along the
barrel is moved for supplying a next bullet, there is known a toy
gun, in which the shooting of a bullet charged in a loading chamber
disposed at the back of the barrel is done by using a gas pressure
and in which the automatic supply of a bullet to the loading
chamber by the movement of the slider is also done by using the gas
pressure.
[0005] Generally in this toy gun, the grip is provided with a
magazine for holding a plurality of bullets, and an accumulation
chamber for reserving gas. Each time the bullet charged in the
loading chamber is shot by using the gas pressure from the
accumulation chamber formed in the grip, the gas pressure from the
accumulation chamber is further used to move the slider backward
and then forward in the direction along the barrel, so that the
bullets held in the magazine disposed in the grip can be supplied
to the emptied loading chamber and shot automatically. Usually in
this toy gun in which the gas pressure is used to shoot the bullet
charged in the loading chamber and to supply the bullet to the
loading chamber, the gas to be reserved in the accumulation chamber
is exemplified by a liquefied gas under a low pressure, and the
bullet to be charged in the loading chamber is a sham one called
the "BB bullet" made of plastics and having a relatively small
diameter such as about 6 mm.
[0006] Apart from the toy gun using the aforementioned sham bullet
of a diameter of about 6 mm, on the other hand, there is also known
a toy gun, which uses a paint containing bullet (as will be called
the "paint bullet") having a relatively large diameter exceeding 10
mm, such as about 17 mm and made easily crushable to discharge the
paint (for example, as referred to the non-patent publication:
"Monthly Magazine Gun, October", issued on Oct. 1, 1992 by Kokusai
Shuppan Kabushiki Gaisha, pp. 66 to 75).
[0007] In the toy gun using the paint bullet given a relatively
large diameter and a relatively heavy weight by containing the
paint, as disclosed in the aforementioned non-patent publication, a
gas tank charged with carbonate gas (i.e., CO.sub.2 gas) under a
high pressure is arranged in the frame, and a magazine called the
"loader" capable of holding a plurality of paint bullets is so
mounted in the rear portion of the barrel with an upward protrusion
through a feeding port.
[0008] In the frame, moreover, there are arranged a movable member
formed by combining an upper bolt and a lower bolt, and a valve
mechanism formed by arranging an exhaust valve movably in an air
chamber formed by a cylinder member. The valve mechanism is
provided with first and second gas passages and a connection gas
passage for connecting those gas passages. When the trigger is
pulled to shoot the paint bullet charged in the rear portion of the
barrel, moreover, the movable member is advanced by the biasing
force of a spring member to act on the movable member, thereby to
provide the communication between the first gas passage formed in
the valve mechanism and the barrel and to move the exhaust valve
from the position, at which the gas pressure from the gas tank is
not introduced into the connection gas passage, to the position, at
which the gas pressure from the gas tank is introduced into the
connection gas passage. As a result, the gas pressure from the gas
tank flows into both the first and second gas passages through the
connection gas passage. The gas pressure having entered the first
gas passage is guided into the barrel so that it is used for
shooting the paint bullet.
[0009] When the paint bullet is shot, moreover, the movable member,
which is caused when advanced to take the position for closing a
feeding port from the barrel, is retracted by the raised gas
pressure coming from the gas tank and acting through the second gas
passage formed in the valve mechanism. As a result, the exhaust
valve is moved from the position, at which the gas pressure from
the gas tank is introduced into the connection gas passage, to the
position, at which the gas pressure from the gas tank is not
introduced into the connection gas passage, and the feeding port
and the rear portion of the barrel are made to communication so
that one of the paint bullets held in the loader drops by its own
weight to the rear portion of the barrel through the feeding port
and is charged. Each time the paint bullets charged in the rear
portion of the barrel are shot, the emptied barrel is automatically
supplied at its rear portion with a new paint bullet.
[0010] In the aforementioned toy gun in which the shooting of the
paint bullet charged in the rear portion of the barrel acting
substantially as the loading chamber and the supply of the paint
bullet to the rear portion of the barrel are performed by using the
gas pressure, the gas pressure from the gas tank is introduced into
the first gas passage through the connection gas passage by the
movement of the exhaust valve, as caused by the forward movement of
the movable member, and the gas pressure from the gas tank is also
partially introduced into the second gas passage through the
connection gas passage when it is used for shooting the paint
bullet. However, the introduction of the gas pressure into the
second gas passage is substantially the leakage of the gas pressure
from the connection gas passage, for the time period from the
introduction start to the instant when the paint bullet is shot by
the gas pressure introduced into the first gas passage, so that the
gas pressure to be guided from the gas tank to the connection gas
passage for shooting the paint bullet is partially lost. In the toy
gun constructed to avoid the situation in which the gas pressure to
be used for shooting the paint bullet might otherwise be partially
lost, moreover, gas under a high pressure has to be employed, so
that the gas tank as the gas supply source is so charged with a
high-pressure gas such as the CO.sub.2 gas as to ensure the
shooting the paint bullet having a relatively heavy weight.
[0011] In the toy gun which is adapted to shoot the paint bullet
and to supply the paint bullet to the loading chamber by utilizing
the gas pressure, therefore, it is desired to avoid the situation,
in which the gas pressure to be used for shooting the paint bullet
charged in the loading chamber might otherwise be partially lost.
It is accordingly desired that the paint bullet charged in the
loading chamber is reliably shot even by using the low-pressure
gas. In the prior art, however, there has not been found the toy
gun, which can satisfy those desired.
OBJECTS AND SUMMARY OF THE INVENTION
[0012] Accordingly, it is an object of the present invention to
provide a toy gun which is adapted to shoot a paint bullet and to
supply the paint bullet to a loading chamber by utilizing gas
pressure, and which avoids the aforementioned disadvantages
encountered with the prior art.
[0013] Another object of the present invention is to provide a toy
gun, which can be freed from the situation that gas pressure to be
used for shooting a bullet from a loading chamber might otherwise
be partially lost, when the shooting of the bullet charged in the
loading chamber disposed in a barrel and the supply of the bullet
to the loading chamber are done by using the gas pressure, and
which can reliably shoot a paint bullet charged in the loading
chamber, even when the bullet to be charged in the loading chamber
is the paint bullet having a relatively heavy weight and when the
gas to be used is exemplified by gas under a lower pressure than
that of CO.sub.2 gas.
[0014] According to the first aspect of the present invention,
there is provided a toy gun comprising: a frame including a barrel,
a loading chamber formed in the barrel, a magazine for holding
bullets to be charged in the loading chamber, and a trigger; a
movable member arranged with a pressure receiving potion in the
frame and made movable in a first direction toward the loading
chamber and in a second direction opposed to the first direction; a
drive mechanism for moving the movable member in the first
direction in response to the operation of the trigger; a gas supply
controller connected to a gas outlet passage for taking a gas
supply state, in which gas is supplied, as the movable member moves
in the first direction; and a gas flow control mechanism arranged
movably with respect to the movable member and forming a first gas
passage for guiding the gas into the loading chamber and a second
gas passage for guiding the gas to the pressure receiving portion,
whereby, for a period in which the gas supply controller takes the
gas supply state as the movable member moves in the first
direction, the gas flow control mechanism transfers from a first
state, in which the first gas passage is opened whereas the second
gas passage is closed to supply the gas obtained in the gas outlet
passage to the loading chamber through the first gas passage, to a
second state, in which the first gas passage is closed whereas the
second gas passage is opened to apply the gas obtained in the gas
outlet passage to the pressure receiving portion through the second
gas passage, so that the movable member is moved in the second
direction thereby to make preparations for supplying the ballet
from the magazine to the loading chamber.
[0015] In the second aspect of the invention, paint the bullets to
be held in the magazine are paint bullets for discharging paint
when crushed.
[0016] In the toy gun thus constructed according to the invention,
the gas supply controller is held in the gas supply state to supply
the gas to the gas outlet passage, accordingly as the movable
member moves in the first direction to the loading chamber in
accordance with the operation of the trigger. The gas thus supplied
to the gas outlet passage is guided to the loading chamber through
such the first gas passage in the gas flow control mechanism to
open the first gas passage and to close the second gas passage so
that it is used for shooting the bullet charged in the loading
chamber. This bullet shooting, i.e., the movement of the bullet
from the loading chamber lowers the gas pressure in the gas flow
control mechanism. By the action of the gas flow control mechanism
accompanying the lowering of the gas pressure, the first gas
passage is changed from the open state to the closed state, and the
second gas passage is changed from the closed state to the open
state. As a result, the gas, as fed to the gas outlet passage by
the movement of the movable member in the first direction to the
loading chamber, acts the pressure receiving portion formed on the
movable member through the second gas passage so that the movable
member is moved in the second direction apart from the loading
chamber, to take the state for making preparations for supplying
the loading chamber with the bullet.
[0017] In the gas flow control mechanism, therefore, when the gas
fed to the gas outlet passage is fed to the loading chamber through
the first gas passage, the second gas passage is closed to prevent
the situation, in which the gas flows into the second gas passage.
As a result, the situation, in which the gas pressure to be used
for shooting the bullet charged in the loading chamber is partially
lost, is reliably avoided to use the gas supplied to the gas outlet
passage, effectively for shooting the bullet. As a result, not only
in case the bullet to be supplied from the magazine to the loading
chamber is exemplified by the paint bullet having a relatively
heavy weight but also in case the low-pressure gas is supplied from
the gas supply means to the gas outlet passage, it is possible to
shoot the paint bullet reliably from the loading chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a sectional view presented for describing the
construction and actions of one embodiment of a toy gun according
to the invention defined in any of claims 1 to 6;
[0019] FIG. 2 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1;
[0020] FIG. 3 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1;
[0021] FIG. 4 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1;
[0022] FIG. 5 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1;
[0023] FIG. 6 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1;
[0024] FIG. 7 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1; and
[0025] FIG. 8 is a sectional view presented for describing the
construction and actions of the embodiment shown in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0026] FIG. 1 is a sectional view presented for describing the
construction and actions of one embodiment of a toy gun according
to the invention defined in any of claims 1 to 6.
[0027] The embodiment shown in FIG. 1 is provided with a barrel 2,
a loading chamber 4 disposed on the rear side of the barrel 2, a
magazine 5, a gas chamber 8, a movable member 10, a trigger 30, and
a frame 40 having a grip 31. The magazine 5 is located above the
loading chamber 4 and enabled to hold a plurality of paint bullets
P, which have a relatively large diameter of about 11 mm and which
discharge paint when crushed, for example. Moreover, the magazine 5
is provided with a bullet discharge port 5a, which has a diameter
slightly larger than that of the paint bullet P held in the
magazine 5 while confronting the loading chamber 4, so that the
loading chamber 4 is supplied with one paint bullet P when this
paint bullet P drops by its own weight into the loading chamber 4
through the bullet discharge port 5a.
[0028] The paint bullet P having dropped by its own weight from the
magazine 5 in the loading chamber 4 takes an inlet position 4a and
a loading position 4b ahead of the former in the loading chamber 4.
The positioning of the paint bullet P at the inlet position 4a in
the loading chamber 4 is done by a retaining member, which has a
pair of small protrusions 32 (although only one is shown) and is
arranged in the loading chamber 4, and a gas flow control mechanism
50, which will be described hereinafter. On the other hand, the
positioning of the paint bullet P at the loading position 4b in the
loading chamber 4 is done by both an annular seal member 33, which
is arranged in the loading chamber 4, and the gas flow control
mechanism 50.
[0029] To the gas chamber 8, there is connected a gas outlet
passage 34. In this gas outlet passage 34, there is arranged a
control valve 35, which is made movable in the direction along the
barrel 2. The gas outlet passage 34 is extended upward from the gas
chamber 8 and has an upper opening 34a opened in the vicinity of
the loading chamber 4. The gas outlet passage 34 is so controlled
by the control valve 35 arranged therein that it is kept at an open
state, in which it communicates with the gas chamber 8, and at a
closed state, in which its communication with the gas chamber 8 is
blocked.
[0030] The control valve 35 includes a valve function portion 35a
held in the gas chamber 8, and a piston portion 35b having a coil
spring 36 wound thereon. The control valve 35 is biased by the coil
spring 36 in the direction to keep the gas outlet passage 34 in the
closed state. In the piston portion 35b of the control valve 35,
moreover, there is inserted a lock member 38, which can move up and
down. This lock member 38 has radially enlarged upper and lower end
portions, and a coil spring 39 is arranged in the lower end
portion. This coil spring 39 applies the upward and downward
biasing forces to the lock member 38.
[0031] When the control valve 35 takes the position, at which the
gas outlet passage 34 is kept in the closed state by the valve
function portion 35a, as shown in FIG. 1, it brings the piston
portion 35b into downward abutment against the lower end portion of
the lock member 38 and blocks the upward movement of the lock
member 38 against the biasing force of the coil spring 39 thereby
to keep the lock member 38 at a lower position.
[0032] With the gas chamber 8, moreover, there communicates a gas
supply passage 41, to which there is connected a pipe 42 extending
from the external gas supply source such as a gas bomb. The gas
supply passage 41 introduces the gas, as supplied from the external
gas supply source via the pipe 42, into the gas chamber 8.
[0033] The movable member 10 engages with a hole 11, which is so
formed in the frame 40 at the back of the barrel 2 as to extend in
the direction along the barrel 2, so that it can move in the
direction toward the loading chamber 4 and in the opposite
direction apart from the loading chamber 4. With respect to that
movable member 10, moreover, the gas flow control mechanism 50 is
so arranged movably in the direction along the barrel 2 while being
partially inserted in the movable member 10. To this movable member
10, on the other hand, there is connected a drive mechanism 15 for
it. This drive mechanism 15 is constructed to include a moving
member 16 engaging mechanically with the movable member 10, and a
coil spring 43 extending to the outside from a hole 17 opened in
the rear end portion of the moving member 16. An engaging step 18
is formed on the lower portion of the moving member 16.
[0034] In connection with the drive mechanism 15, in the portion of
the frame 40 below the hole 11, there is disposed a bottomed
cylindrical guide 44, which extends in the direction along the
barrel 2. A stem 45 is disposed at the back of the bottomed
cylindrical guide 44. In the bottom of this bottomed cylindrical
guide 44, there is formed a through hole 46, into which the piston
portion 35b of the control valve 35 is movably inserted. The stem
45 protrudes from the rear side portion in the frame 40 toward the
bottomed cylindrical guide 44.
[0035] The moving member 16 constructing the drive mechanism 15 is
inserted from its front end side into the bottomed cylindrical
guide 44. Moreover, the coil spring 43 constructing the drive
mechanism 15 is wound on the stem 45 formed at the frame 40 and has
a portion inserted in the hole 17 formed in the moving member 16.
As a result, the coil spring 43 is guided by the bottomed
cylindrical guide 44 to apply such a biasing force to the moving
member 16 as to move forward together with the movable member
10.
[0036] The movable member 10 includes a cylindrical portion 12
forming its front side portion, and a bottomed cylindrical portion
13 formed to extend to the cylindrical portion 12. This cylindrical
portion 12 formed such that the diameter of its forming internal
space is made larger than that of the internal space formed by the
bottomed cylindrical portion 13, and is provided with a front end
portion 12a made relatively thicker. The bottom portion of the
bottomed cylindrical portion 13 forms a first pressure receiving
portion 14, on which the gas pressure from the gas chamber 8 is
caused to act selectively. In the bottom portion of the bottomed
cylindrical portion 13 having such first pressure receiving portion
14, there is formed a housing portion, in which there are arranged
a piston plunger 20 and a coil spring 21 for applying a biasing
force on the former. The front end face of the piston plunger 20
forms a second pressure receiving portion 22, to which the gas
pressure from the gas chamber 8 is selectively applied. In short,
the movable member 10 is provided with the first pressure receiving
portion 14 and the second pressure receiving portion 22 formed on
the piston plunger 20.
[0037] The gas flow control mechanism 50, as arranged movably in
the movable member 10, is provided with a first gas passage 51, a
second a gas passage 52, and a gas passage forming portion 55
forming a connection passage 53 for connecting the first gas
passage 51 and the second gas passage 52. And, the gas flow control
mechanism 50 is biased in the direction toward the bottom of the
bottomed cylindrical portion 13 by a coil spring 47, which is
arranged between the portion in the gas passage forming portion 55
forming the second gas passage 52 and the front end 12a in the
cylindrical portion 12 of the movable member 10.
[0038] The first gas passage 51 in the gas passage forming portion
55 is extended from the connection passage 53 toward the loading
chamber 4 and is opened to the loading chamber 4. On the other
hand, the second gas passage 52 in the gas passage forming portion
55 is extended from the connection passage 53 toward the second
pressure receiving portion 22 and is opened to the first and second
pressure receiving portions 14 and 22. The gas passage forming
portion 55 has its portion forming the second gas passage 52
inserted slidably in the hole 11 so that it can move in the
direction along the moving direction of the movable member 10,
i.e., in the direction along the barrel 2. On that portion in the
gas passage forming portion 55 to form the second gas passage 52,
there is mounted an annular seal member 56, which is made of an
elastic member. This annular seal member 56 abuts against the
cylindrical inner wall of the bottomed cylindrical portion 13 to
seal up the clearance between that cylindrical inner wall and the
outer circumference of that portion in the gas passage forming
portion 55, which forms the second gas passage 52.
[0039] Moreover, the gas flow control mechanism 50 is provided with
a movable valve 60 including a current plate portion 57 extended in
the first gas passage 51, and a valve function portion 58 disposed
on the rear end side of the current plate portion 57 and arranged
in the connection passage 53. The current plate portion 57 is
constructed by mutually connecting a plurality of current plates
for uniforming the flow of the gas through the first gas passage
51. A coil spring 61 is engaged with the rear side of the valve
function portion 58. The movable valve 60 thus provided with the
current plate portion 57 and the valve function portion 58
opens/closes the first gas passage 51 and the second gas passage 52
and is biased by the coil spring 61 in the direction toward the
loading chamber 4.
[0040] The trigger 30 is turnably attached through a pin 65 to the
frame 40. The trigger 30 engages at its upper end side with a coil
spring 66 arranged in the frame 40, so that it takes an operation
starting position, as shown in FIG. 1, when the coil spring 66
takes the longest state, for example. On the rear side of the
trigger 30, there is arranged a plate-shaped portion 68, which is
selectively connected to the moving member 16 through a connection
member 67. The plate-shaped portion 68 is turnably attached to the
trigger 30 through a pin 69 and is biased in the direction to
protrude to the outside from the rear end of the trigger 30 by the
spring member (although not shown) wound on the pin 69.
[0041] The connection member 67 is provided with a front abutment
portion 67a for abutting selectively against the plate-shaped
portion 68, and a rear abutment portion 67b for abutting
selectively against the engaging step 18 formed on the moving
member 16. The connection member 67 is further provided at its
central portion with a slot 67c, in which a pin 70 mounted in the
frame 40 is inserted. To the front side of the connection member
67, there is connected to the other end of a coil spring 71, one
end of which is connected to the frame 40. This coil spring 71
applies such a biasing force to the connection member 67 as turns
it in the counter-clockwise direction, as seen in FIG. 1.
Therefore, the connection member 67 can be displaced within such a
range by the biasing force of the coil spring 71 as is defined by
the slot 67c having the pin 70 inserted therein. Although not
shown, the frame 40 is provided with a stopper member for
regulating the displacement of the connection member 67.
[0042] In the embodiment of the toy gun thus constructed according
to any of claims 1 to 5, when the trigger 30 takes the operation
starting position, as shown in FIG. 1, the control valve 35 is
caused by the biasing force of the coil spring 36 to take the
position, at which it closes the gas outlet passage 34 to block the
gas flow from the gas chamber 8 to the gas outlet passage 34,
thereby to keep the lock member 38 at the lower position. Moreover,
the plate-shaped portion 68 comes upward into abutment against the
front abutment portion 67a of the connection member 67 thereby to
regulate the turn of the connection member 67 according to the
biasing force of the coil spring 71.
[0043] At this time, the connection member 67 brings its rear
abutment portion 67b into abutment against the engaging step 18
formed on the moving member 16, so that the moving member 16 may
take a reference position, at which the movable member 10 is at the
back of the upper end portion of the lock member 38 to take the
lower position, and may keep an initial position, at which the
front end of the moving member 16 is slightly inserted into the
bottomed cylindrical guide 44. When the movable member 10 takes
such reference position, the piston plunger 20 takes a forward
position according to the biasing force of the coil spring 21, and
abuts against the rear end of the gas passage forming portion 55 in
the gas flow control mechanism 50. With the state in which the
opening of the second gas passage 52 is closed by the second
pressure receiving portion 22, therefore, the gas passage forming
portion 55 is caused to keep the position slightly spaced from the
first pressure receiving portion 14. The gas passage forming
portion 55 thus placed at the position slightly spaced from the
first pressure receiving portion 14 positions its portion forming
the first gas passage 51, above the upper opening 34a of the gas
outlet passage 34.
[0044] When the movable member 10 takes the reference position,
moreover, the movable valve 60 of the gas flow control mechanism 50
takes the forward position according to the biasing force of the
coil spring 61. As a result, the valve function portion 58 in the
movable valve 60 takes the position, at which it brings the first
gas passage 51 into the closed state to block the communication
between itself and the connection passage 53, and at which it
brings the second gas passage 52 into the open state to communicate
with the connection passage 53. Accordingly, the current plate
portion 57 of the movable valve 60 takes the position, at which its
leading end is protruded from the first gas passage 51 into the
inlet position 4a of the loading chamber 4. The paint bullet P
having dropped by its own weight from the magazine 5 into the
loading chamber 4 is positioned at the inlet position 4a of the
loading chamber 4 by the abutment against the leading end of the
current plate portion 57 from the rear side and by the abutments
against the paired small protrusions 32 from the left and right
sides.
[0045] When the paint bullet P is thus positioned at the inlet
position 4a of the loading chamber 4, the trigger 30 is pulled to
turn on the pin 65 while compressing the coil spring 66 so that it
goes from the operation starting position, as shown in FIG. 1, to
an operation completing position, as shown in FIG. 2. Accordingly,
the connection member 67 engaging with the trigger 30 through the
plate-shaped portion 68 is turned in the direction against the
biasing force of the coil spring 71. As a result, the rear abutment
portion 67b of the connection member 67 comes out of engagement
with the engagement step 18 formed on the moving member 16, so that
the moving member 16 starts its forward movement according to the
biasing force of the coil spring 43. The moving member 16 thus
moving forward moves (or advances) the movable member 10 connected
mechanically thereto toward the loading chamber 4 while the front
end 12a of the cylindrical portion 12 being caused to pass over the
lock member 38 taking the lower position, thereby to drive the
movable member 10. And, the moving member 16 proceeds in the
bottomed cylindrical guide 44 toward the control valve 35.
[0046] As the movable member 10 advances, the gas flow control
mechanism 50 closes the bullet discharge port 5a of the magazine 5
with that portion of the gas passage forming portion 55, which
forms the first gas passage 51, and transfers the paint bullet P in
abutment against the current plate portion 57 of the movable valve
60, in the loading chamber 4 from the inlet position 4a to the
loading position 4b while riding over the small protrusions 32.
[0047] The advancing movable member 10 stops its movement toward
the loading chamber 4 when the front end 12a of the cylindrical
portion 12 abuts against the abutment portion 72 formed at the
frame 40, as shown in FIG. 3. At this time, the moving member 16
collides against the piston portion 35b of the control valve 35
from the rear side thereby to move the control valve 35 in the
direction against the biasing force of the coil spring 36. As a
result, the gas outlet passage 34 is transferred from the closed
state, in which its communication with the gas chamber 8 is blocked
by the valve function portion 35a of the control valve 35, to the
open state, in which it communicates with the gas chamber 8. In
accordance with this movement of the control valve 35 from the
closed state to the open state of the gas outlet passage 34, the
lock member 38 is released from the state, in which it is kept at
the lower position by the piston portion 35b, so that it is lifted
by the biasing force of the coil spring 39 from the lower position
to an upper position, at which its upper end abuts against the
lower portion of the movable member 10.
[0048] The moving member 16 having stopped the movable member 10 by
bringing it into abutment against an abutment portion 72 formed on
the frame 40 abuts at its front end against the piston portion 35b
of the control valve 35 at the position, it is spaced by a
predetermined distance from the through hole 46 in the bottomed
cylindrical guide portion 44, to hold the control valve 35 at a
position to open the gas outlet passage 34 thereby to establish the
gas flow from the gas chamber 8 to the gas outlet passage 34. As a
result, the piston portion 35b abuts against the lower end of the
lock member 38 taking the upper position, from its rear side.
[0049] When the movable member 10 stops its movement toward the
loading chamber 4, moreover, the paint bullet P transferred by the
gas flow control mechanism 50 comes into abutment against the
annular seal member 33 disposed in the loading chamber 4, and is
positioned at the loading position 4b in the loading chamber 4 by
the annular seal member 33 and the gas flow control mechanism 50.
The paint bullet P abutting against the annular seal member 33
applies a pushing force in the direction against the biasing force
of the coil spring 61 to the movable valve 60, and applies a
pushing force in the direction against the biasing force of the
coil spring 21 for bringing the piston plunger 20 into the forward
position, to the gas passage forming portion 55.
[0050] As a result, the movable valve 60 takes the position, at
which the first gas passage 51 is opened by its valve function
portion 58 to communicate with the connection passage 53, and at
which the second gas passage 52 is closed to block the
communication with the connection passage 53, as shown in FIG. 3.
Moreover, the gas passage forming portion 55 causes the piston
plunger 20 to take a retracted position against the biasing force
of the coil spring 21 thereby to bring its rear end into abutment
against the first and second pressure receiving portions 14 and 22.
As a result, the opening of the second gas passage 52 is
continuously closed by the second pressure receiving portion 22.
Moreover, the connection passage 53 in the gas passage forming
portion 55 is caused to communicate with the gas outlet passage 34
through the upper opening 34a.
[0051] On the other hand, the connection member 67 having the rear
abutment portion 67b disengaged from the engaging step 18 formed on
the moving member 16 is displaced by the biasing force of the coil
spring 71 so that it is regulated by the not-shown stopper member
at the position, where it contacts with neither the plate-shaped
portion 68 nor the moving member 16, as shown in FIG. 3.
[0052] The gas outlet passage 34, as opened by the control valve
35, is supplied from the gas chamber 8 with the gas, which is
introduced from the external gas supply source. Specifically, the
gas chamber 8, the control valve 35, the coil spring 36, the lock
member 38, the coil spring 39 and so on construct a gas supply
controller for supplying the gas outlet passage 34 with the gas as
the movable member 10 moves toward the loading chamber 4. And, the
gas, as supplied to the gas outlet passage 34 from the gas chamber
8, abruptly flows into the connection passage 53, which is made to
communicate with the gas outlet passage 34, in the gas flow control
mechanism 50. The gas thus having abruptly flown into the
connection passage 53 is guided to the loading position 4b of the
loading chamber 4 through the first gas passage 51 opened by the
valve function portion 58 of the movable valve 60. As a result, the
high gas pressure from the gas chamber 8 acts on the paint bullet P
abutting against the annular seal member 33 so that the paint
bullet P is so moved by the action of the gas pressure as to ride
over the annular seal member 33 from the loading chamber 4 to the
front of the annular seal member 33, as shown in FIG. 4.
[0053] The paint bullet P, as moved from the loading chamber 4 into
the barrel 2 located in the front, is accelerated toward the
leading end of the barrel 2 while receiving the gas pressure from
the back. Thus, the paint bullet P is moved from the loading
chamber 4 into the barrel 2 on the front side of the former and is
accelerated in the barrel 2 toward the leading end of the same.
Accordingly as the space in the barrel 2 at the back of the paint
bullet P abruptly expands, the gas pressure in the loading chamber
4 and in the first gas passage 51 of the gas flow control mechanism
50 drops. As the gas pressure in the first gas passage 51 thus
drops, the movable valve 60 is advanced in the gas flow control
mechanism 50 by the biasing force of the coil spring 61. As a
result, by the valve function portion 58 of the movable valve 60,
the first gas passage 51 is closed to block its communication with
the connection passage 53, and the second gas passage 52 is opened
to communicate with the connection passage 53, as shown in FIG. 4.
As the gas pressure in the first gas passage 51 thus drops, the
paint bullet P having moved in the barrel 2 is shot from the
leading end of the barrel 2 till the movable valve 60 is caused by
its valve function portion 58 to take the position, at which the
first gas passage 51 is closed and at which the second gas passage
52 is opened.
[0054] In the gas flow control mechanism 50, as has been described
above, the first gas passage 51 is closed, but the second gas
passage 52 is opened. As a result, the gas outlet passage 34 is
held in the state to communicate with the second gas passage 52
through the connection passage 53. Then, the gas from the gas
chamber 8 through the connection passage 53 and the second gas
passage 52 applies its high pressure to the second pressure
receiving portion 22 for closing the opening of the second gas
passage 52. This high gas pressure to act on the second pressure
receiving portion 22 retracts the movable member 10 against the
biasing force of the coil spring 43, as accompanied by the moving
member 16 connected mechanically to the movable member 10. As a
result, a pressure chamber 80 of a variable capacity is formed
between the first and second pressure receiving portions 14 and 22
and the gas flow control mechanism 50, as shown in FIG. 5, the gas
from the gas chamber 8 through the connection passage 53 and the
second gas passage 52 applies its high gas pressure not only to the
second pressure receiving portion 22 but also the first pressure
receiving portion 14. Thus, the movable member 10 to receive the
high pressure of the gas through the second gas passage 52 at the
first and second pressure receiving portions 14 and 22 is abruptly
retracted while expanding the pressure chamber 80.
[0055] At this time, the piston plunger 20 having the second
pressure receiving portion 22 is enabled to move from the retracted
position to the forward position according to the biasing force of
the coil spring 21, because the pressure chamber 80 of the variable
capacity is formed between the second pressure receiving portion 22
and the gas flow control mechanism 50.
[0056] According to the retraction of the movable member 10 by the
action of the gas pressure, the moving member 16 connected
mechanically to the movable member 10 is spaced backward from the
piston portion 35b of the control valve 35, as shown in FIG. 5. As
a result, the control valve 35 starts its movement according to the
biasing force of the coil spring 36, but this movement is instantly
stopped by the abutment of the piston portion 35b of the control
valve 35 from the front side against the lower end of the lock
member 38 taking the upper position. As a result, there is
continuously kept the state, in which the valve function portion
35a of the control valve 35 holds the gas outlet passage 34 in the
open state.
[0057] The movable member 10, as caused to continue the retraction
together with the moving member 16 by the action of the gas
pressure from the gas chamber 8, brings the moving member 16 into
abutment against the rear abutment portion 67b of the connection
member 67, as shown in FIG. 6, and pushes the lock member 38 taking
the upper position in the direction against the biasing force of
the coil spring 39 by the front end 12a of the cylindrical portion
12 thereby to move the same from the upper position to the lower
position.
[0058] When the lock member 38 is moved from the upper position to
the lower position, the control valve 35 is moved by the biasing
force of the coil spring 36 to return from the state, in which the
valve function portion 35a opens the gas outlet passage 34 to
communicate with the gas chamber 8, to the state, in which the
valve function portion 35a closes the gas outlet passage 34 to
block the communication with the gas chamber 8. As a result, the
flow of the gas from the gas chamber 8 into the gas inlet passage
34 is stopped. The piston portion 35b of the control valve 35
having closed the gas outlet passage 34 abuts against the lower end
of the lock member 38 having reached the lower position, from the
upper side, thereby to keep the lock member 38 at the lower
position.
[0059] Even if the gas outlet passage 34 is thus closed by the
control valve 35 thereby to stop the supply of the gas from the gas
chamber 8 to the pressure chamber 80 of the variable capacity, the
movable member 10 continues its further retraction by its inertia.
Just before the movable member 10 moving together with the moving
member 16 reaches the most retracted position, at which it stops
the retraction while abutting against the rear end of the frame 40,
as shown in FIG. 7, that portion of the gas passage forming portion
55, which forms the second gas passage 52, comes out of engagement
with the bottomed cylindrical portion 13 so that the gas flow
control mechanism 50 is retracted as a whole together with the
movable member 10 moving toward the most retracted position.
[0060] As a result, the sealing property of the pressure chamber 80
by the annular seal member 56 is lost so that the gas residing in
the pressure chamber 80 and the gas residing in the second gas
passage 52 are released to the atmosphere through a clearance 81
formed between the cylindrical portion 12 and that portion of the
gas passage forming portion 55, which forms the second gas passage
52. The release of the gas residing in the second gas passage 52 to
the atmosphere is also made through the connection passage 53,
which is released from the mutual communication with the gas outlet
passage 34. Moreover, that portion of the gas passage forming
portion 55, which forms the first gas passage 51, is positioned
above the upper opening 34a of the gas outlet passage 34.
[0061] Thus, the movable member 10, which has reached the most
retracted position after the gas residing in the gas flow control
mechanism 50 and the gas residing in the movable member 10 were
released to the atmosphere, instantly turns together with the
moving member 16 or the like to the state, in which it is advanced
to the reference position by the biasing force of the coil spring
43, and the gas flow control mechanism 50 is retracted by the
biasing force of the coil spring 47. The retraction of the gas flow
control mechanism 50 by the biasing force of the coil spring 47 is
stopped, as shown in FIG. 8, by the abutment of the rear end of the
gas passage forming portion 55 against the piston plunger 20 taking
the forward position. In this situation, the opening of the second
gas passage 52 in the gas passage forming portion 55 is closed by
the second pressure receiving portion 22, and that portion of the
gas passage forming portion 55, which forms the first gas passage
51, is positioned at the back of the loading chamber 4, thereby to
cause the bullet discharge port 5a of the magazine 5 to communicate
with the inlet position 4a in the loading chamber 4. As a result,
the paint bullet P drops from the magazine 5 into the inlet
position 4a in the loading chamber 4. The paint bullet P having
dropped to the inlet position 4a is positioned by the current plate
portion 57 in the movable valve 60 abutting the back of the paint
bullet P and by the paired small protrusions 32.
[0062] The advance of the moving member 16 by the biasing force of
the coil spring 43 is stopped, as shown in FIG. 8, when the moving
member 16 is regulated in position by the connecting member 67
after the engaging step 18 formed on the moving member 16 abutted
against the rear abutment portion 67b of the connection member 67
from the rear side and advanced the connection member 67 within the
range defined by the slot 67c and the pin 70. When the moving
member 16 is regulated in position by the connection member 67, the
movable member 10 is placed at the reference position which is at
the back of the upper end portion of the lock member 38 taking the
lower position, and the moving member 16 is placed at the initial
position, in which its front end portion is slightly inserted into
the bottomed cylindrical guide portion 44. Moreover, the connection
member 67 for regulating the position of the moving member 16
pushes the plate-shaped portion 68 formed on the trigger 30, with
its front abutment portion 67a from the rear side thereby to turn
the plate-shaped portion 68 in the direction against the biasing
force of the not-shown spring member.
[0063] When the trigger 30 is released in this state from its
pulling operation, the coil spring 66 returns from the compressed
state to the longest state. As shown in FIG. 1, the trigger 30 is
accordingly caused to return to the operation starting position,
and the plate-shaped portion 68 displaces the connection member 67
while being turned in the direction according to the biasing force
of the spring member acting thereon, and abuts against the front
abutment portion 67a of the connection member 67 from the lower
side thereby to regulate the turn of the connection member 67 in
the direction according to the biasing force of the coil spring
71.
[0064] Thus, the connection member 67 is held in the state to
regulate the position of the moving member 16, by bringing the
plate-shaped portion 68 into abutment from its lower side against
the front abutment portion 67a while being regulated in the turn in
the direction according to the biasing force of the coil spring 71,
and by bringing the rear abutment portion 67b into abutment against
the engaging step 18 formed at the moving member 16 taking the
initial position. When the trigger 30 taking the operation starting
position is pulled again in that state, the paint bullet P is shot
from the loading chamber 4, as has been described hereinbefore, and
is subsequently supplied to the loading chamber 4.
[0065] The embodiment of the toy gun provided with the gas flow
control mechanism 50, as has been described hereinbefore, is freed
from the following situation. When the paint bullet P is to be shot
from the loading chamber 4, the second gas passage 52 in the gas
flow control mechanism 50 is closed so that the gas pressure from
the gas chamber 8 leading to the gas outlet passage 34 is not
guided to the second gas passage 52. Therefore, there is reliably
avoided the situation, in which the gas pressure to be used for
shooting the paint bullet P from the loading chamber 4 might
otherwise be partially lost. Therefore, the gas pressure from the
gas chamber 8 is effectively applied to the paint bullet P charged
in the loading chamber 4 so that the paint bullet P can be reliably
shot from the loading chamber 4 even in case the gas to be supplied
from the gas chamber 8 to the gas outlet passage 34 is exemplified
by a low-pressure gas such as a liquefied gas.
[0066] Thus, the toy gun according to the invention specified in
the Claims, as exemplified by the toy gun according to the
invention of claim 6, may also be constructed by providing an
accumulation chamber 8' to be charged with a low-pressure liquefied
gas in the frame 40, in place of the gas chamber 8 in the
embodiment shown in FIG. 1 to FIG. 8, so that the gas supply
control means may include the accumulation chamber 8' to be charged
with the low-pressure liquefied gas, in place of the gas chamber
8.
[0067] Moreover, the gas flow control mechanism 50 is constructed
to include the gas passage forming portion 55 arranged movably in
the movable member 10, and the movable valve 60 arranged movably in
the gas passage forming portion 55, and is not assembled directly
with the frame 40. Therefore, the gas flow control mechanism 50
makes the toy gun having itself, simple in construction and easy in
assembly.
[0068] In the toy gun thus constructed according to the invention,
as apparent from the gas supply controller is held in the gas
supply state to supply the gas to the gas outlet passage,
accordingly as the movable member moves in the first direction to
the loading chamber in accordance with the operation of the
trigger, and the gas thus supplied to the gas outlet passage is
guided to the loading chamber through such the first gas passage in
the gas flow control mechanism to open the first gas passage and to
close the second gas passage so that it is used for shooting the
bullet charged in the loading chamber. This movement of the bullet
from the loading chamber lowers the gas pressure in the gas flow
control mechanism. By the action of the gas flow control mechanism
accompanying the lowering of the gas pressure, the first gas
passage is changed from the open state to the closed state, and the
second gas passage is changed from the closed state to the open
state. As a result, the gas, as fed to the gas outlet passage by
the movement of the movable member in the first direction to the
loading chamber, acts the pressure receiving portion formed on the
movable member through the second gas passage so that the movable
member is moved in the second direction apart from the loading
chamber, to take the state for making preparations for supplying
the loading chamber with the bullet.
[0069] In the gas flow control mechanism, therefore, when the gas
fed to the gas outlet passage is fed to the loading chamber through
the first gas passage, the second gas passage is closed to prevent
the situation, in which the gas flows into the second gas passage.
As a result, the situation, in which the gas pressure to be used
for shooting the bullet charged in the loading chamber is partially
lost, is reliably avoided to use the gas supplied to the gas outlet
passage, effectively for shooting the bullet. As a result, not only
in case the bullet to be supplied from the magazine to the loading
chamber is exemplified by the paint bullet having a relatively
heavy weight but also in case the low-pressure gas is supplied from
the gas supply means to the gas outlet passage, it is possible to
shoot the paint bullet reliably from the loading chamber.
* * * * *