U.S. patent application number 13/914768 was filed with the patent office on 2014-09-11 for synchronous movement device applied to dual-shaft system.
The applicant listed for this patent is FIRST DOME CORPORATION. Invention is credited to AN SZU HSU.
Application Number | 20140251039 13/914768 |
Document ID | / |
Family ID | 51486141 |
Filed Date | 2014-09-11 |
United States Patent
Application |
20140251039 |
Kind Code |
A1 |
HSU; AN SZU |
September 11, 2014 |
SYNCHRONOUS MOVEMENT DEVICE APPLIED TO DUAL-SHAFT SYSTEM
Abstract
A synchronous movement device applied to dual-shaft system
includes a first shaft and a second shaft, which are assembled with
each other and synchronously rotatable. The synchronous movement
device further includes a driver disposed on the first shaft and a
reactor disposed on the second shaft and a link unit connected
between the driver and the reactor. When the first shaft drives the
driver to rotate, the driver pushes the link unit to move along the
first and second shafts to forcedly push the reactor to rotate in a
direction reverse to the moving direction of the driver.
Accordingly, the first and second shafts are synchronously
rotated.
Inventors: |
HSU; AN SZU; (NEW TAIPEI
CITY, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FIRST DOME CORPORATION |
NEW TAIPEI CITY |
|
TW |
|
|
Family ID: |
51486141 |
Appl. No.: |
13/914768 |
Filed: |
June 11, 2013 |
Current U.S.
Class: |
74/63 |
Current CPC
Class: |
H04M 1/0216 20130101;
G06F 1/1681 20130101; E05Y 2900/606 20130101; F16H 21/12 20130101;
F16H 25/186 20130101; Y10T 16/540255 20150115; Y10T 16/5387
20150115; Y10T 16/547 20150115; Y10T 74/1836 20150115; Y10T
16/54038 20150115 |
Class at
Publication: |
74/63 |
International
Class: |
F16H 21/12 20060101
F16H021/12 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 11, 2013 |
TW |
102108559 |
Claims
1. A synchronous movement device applied to dual-shaft system,
comprising: a first shaft having a fixed end and a pivoted end; a
driver disposed at the pivoted end of the first shaft; a second
shaft having a fixed end and a pivoted end; a reactor disposed at
the pivoted end of the second shaft; and a link unit having a first
main body and a second main body connected with each other, the
first and second main bodies being assembled and disposed on the
first and second shafts, the first and second main bodies being
respectively connected with the driver and the reactor, the driver
being rotatable with the first shaft to push the link unit to move
along the first and second shafts so as to make the reactor rotate
in a direction reverse to a moving direct ion of the driver,
whereby the first and second shafts are synchronously rotated.
2. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein the link unit has a connection section
connected between the first and second main bodies.
3. The synchronous movement device applied to dual-shaft system as
claimed in claim 2, wherein the first and second main bodies and
the connection section are integrally formed.
4. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein each of the first and second main
bodies is formed with a cavity.
5. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein the first and second main bodies have
the form of a semicircular case, each of the first and second main
bodies being formed with a cavity.
6. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, further comprising a frame set, by means of
fixing members, the frame set being integrally locked to enclose
and receive the driver, the subsidiary driver, the link unit and
the reactor and the subsidiary reactor.
7. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein the first and second shafts are
assembled with each other and disposed in a casing.
8. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein the fixed ends of the first and second
shafts are respectively fixed on a display module and an apparatus
body module of an electronic apparatus by means of fixing
seats.
9. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein when the first shaft is
0.degree..about.180.degree. rotated, the second shaft is
synchronously 0.degree..about.180.degree. rotated in a reverse
direction.
10. The synchronous movement device applied to dual-shaft system as
claimed in claim 8, wherein when the first shaft is
0.degree..about.180.degree. rotated, the second shaft is
synchronously 0.degree..about.180.degree. rotated in a reverse
direction.
11. The synchronous movement device applied to dual-shaft system as
claimed in claim 1, wherein the driver and the reactor have the
form of a raised section, the first and second main bodies being
respectively formed with guide grooves corresponding to the driver
and the reactor in the form of a raised section for movably
receiving the driver and the reactor.
12. The synchronous movement device applied to dual-shaft system as
claimed in claim 4, wherein inner walls of the cavities of the
first and second main bodies are at least partially formed with
guide grooves.
13. The synchronous movement device applied to dual-shaft system as
claimed in claim 5, wherein inner walls of the cavities of the
first and second main bodies are at least partially formed with
guide grooves.
14. The synchronous movement device applied to dual-shaft system as
claimed in claim 12, wherein the guide grooves are spiral guide
grooves.
15. The synchronous movement device applied to dual-shaft system as
claimed in claim 13, wherein the guide grooves are spiral guide
grooves.
16. The synchronous movement device applied to dual-shaft system as
claimed in claim 11, wherein the guide groove of the first main
body has a spiral direction reverse to a spiral direction of the
guide groove of the second main body.
17. The synchronous movement device applied to dual-shaft system as
claimed in claim 12, wherein the guide groove of the first main
body has a spiral direction reverse to a spiral direction of the
guide groove of the second main body.
18. The synchronous movement device applied to dual-shaft system as
claimed in claim 13, wherein the guide groove of the first main
body has a spiral direction reverse to a spiral direction of the
guide groove of the second main body.
19. The synchronous movement device applied to dual-shaft system as
claimed in claim 14, wherein the guide groove of the first main
body has a spiral direction reverse to a spiral direction of the
guide groove of the second main body.
20. The synchronous movement device applied to dual-shaft system as
claimed in claim 15, wherein the guide groove of the first main
body has a spiral direction reverse to a spiral direction of the
guide groove of the second main body.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to a synchronous
movement device applied to dual-shaft system including a first
shaft and a second shaft. The synchronous movement device includes
a driver disposed on the first shaft and a reactor disposed on the
second shaft and a link unit connected between the driver and the
reactor. In operation, the driver, the link unit and the reactor
serve to transmit force to make the first and second shafts
synchronously rotate.
[0003] 2. Description of the Related Art
[0004] There are various electronic apparatuses provided with
covers or display screens or viewers, such as mobile phones,
notebooks, PDA, digital imagers and electronic books. The covers or
display screens or viewers are pivotally mounted on the electronic
apparatuses via pivot pins or rotary shafts, whereby the covers or
display screens or viewers can be freely rotated and opened/closed
under external force.
[0005] In order to operate the display module (such as the screen)
and/or the apparatus body module of the electronic apparatus in
more operation modes and application ranges, a dual-shaft mechanism
is provided between the display module and the apparatus body
module, whereby the display module and/or the apparatus body module
can be operated in different operation modes by different
rotational angles.
[0006] In the above conventional pivot pin structures or rotary
shaft structures, generally multiple gaskets with through holes and
recessed/raised locating sections, multiple frictional plates and
multiple cooperative springs are assembled on the rotary shaft. Two
ends of the rotary shaft are respectively fixed by means of
retainer rings or retainer members. The springs serve to store
energy and release the energy to achieve the objects of rotating
and locating the rotary shaft or pivot pin assembly. Basically, the
above structures are relatively complicated and it is hard to
assemble the structures. Moreover, after a period of operation, the
recessed/raised locating sections of the gaskets or frictional
plates are likely to wear. This will affect the locating
effect.
[0007] There is also a conventional mechanism composed of rollers
and drive wires (or transmission belts) for transmitting force to
the rotary shaft so as to rotate the rotary shaft. As known by
those who are skilled in this field, during the operation process
of the wires or the transmission belts, delay of kinetic energy
transmission will take place. This is because there is a gap
between the wires (or transmission belts) and the rollers and the
wires (or transmission belts) will slip or untruly operate. Also,
the wires (or transmission belts) are made of elastic material and
the fixing structure for assembling the wires (or transmission
belts) with the rollers is not ideal. As a result, in force
transmission, the load on the wires or the pulling force applied to
the wires will increase. In this case, the transmission and shift
effect of the wires will be deteriorated and the wires may detach
from the rollers. Especially, after a period of use, the force of
the wires or transmission belts, which is preset in the assembling
process will decrease due to elastic failure. Under such
circumstance, the synchronous movement effect of the transmission
mechanism will be deteriorated.
[0008] In some cases, the wires or transmission belts have serious
elastic fatigue and often detach from the rollers during the
movement of the slide cover module. Under such circumstance, the
rotary shaft device will lose its synchronous displacement
effect.
[0009] There is another problem existing in the application and
manufacturing of the wires or transmission belts. That is, during
the assembling process of the wires or transmission belts, the
wires or transmission belts need to be tensioned. This will make it
more difficult to control the quality of wiring and assembling.
Therefore, the ratio of good products can be hardly promoted and
the assembling time can be hardly shortened. As a result, the
manufacturing cost is increased.
[0010] In order to improve the above problems, a conventional
dual-shaft synchronous movement device has been developed. Such
dual-shaft synchronous movement device employs multiple gears for
transmitting force. However, as known by those who are skilled in
this field, with the transmission gears, the gap between the shafts
of the dual-shaft synchronous movement device can be hardly
minified. Therefore, the entire transmission unit or structure will
occupy a considerably large space. Especially, when the
transmission unit is applied to a notebook or a miniaturized
electronic device, the electronic device can hardly meet the
requirement for lightweight and slimmed design. This is not what we
expect.
[0011] The conventional rotary shaft structures and the relevant
connection components thereof have some shortcomings in use and
structural design that need to be overcome. It is therefore tried
by the applicant to provide a dual-shaft synchronous movement
device and an assembling method thereof to eliminate the
shortcomings existing in the conventional rotary shaft structure so
as to widen the application range and facilitate the assembling
process of the rotary shaft structure.
[0012] The synchronous movement device applied to the dual-shaft
system of the present invention has the following advantages:
[0013] 1. The synchronous movement device of the present invention
is mounted between the display module and the apparatus body
module. When an operator 0.degree..about.180.degree. rotates the
display module, the apparatus body module is synchronously
relatively 0.degree..about.180.degree. rotated. Therefore, the
total rotational angle of the display module and the apparatus body
module is 360.degree.. Accordingly, the operator can more quickly
and convenient ly operate the electronic apparatus in more
operation modes (or application ranges). Also, the synchronous
movement effect and operational stability of the synchronous
movement device and the cooperative rotary shafts are enhanced.
[0014] 2. The synchronous movement device or transmission mechanism
of the present invention is free from any of the gaskets with
through holes and recessed/raised locating sections and the
frictional plates as well as the springs employed in the
conventional rotary shaft structures. Therefore, the problems
existing in the conventional technique that the structures are
relatively complicated and it is hard to assemble the structures
and the recessed/raised locating sections of the gaskets or
frictional plates are likely to wear can be apparently improved.
[0015] 3. The synchronous movement device of the present invention
overcomes the problem of delay of kinetic energy transmission of
the conventional wires or transmission belts. The synchronous
movement device of the present invention also solves the problem of
the conventional transmission mechanism that there is a gap between
the wires and the rollers so that the wires will slip or untruly
operate. The synchronous movement device of the present invention
also solves the problem of the conventional transmission mechanism
that the fixing structure for assembling the wires with the rollers
is not ideal so that in force transmission, the load on the wires
or the pulling force applied to the wires will increase to
deteriorate the transmission effect. [0016] 4. The synchronous
movement device or transmission mechanism of the present invention
is free from any gear for transmitting force as in the conventional
technique. Therefore, the gap between the shafts can be as minified
as possible. Therefore, the space occupied by the entire
transmission unit or structure is reduced. Accordingly, when the
transmission unit is applied to an electronic device, the
electronic device can meet the requirement for lightweight and
slimmed design.
SUMMARY OF THE INVENTION
[0017] It is therefore a primary object of the present invention to
provide a synchronous movement device applied to dual-shaft system
including a first shaft and a second shaft. The synchronous
movement device includes a driver disposed on the first shaft and a
reactor disposed on the second shaft and a link unit connected
between the driver and the reactor. In operation, the driver, the
link unit and the reactor serve to transmit force to make the first
and second shafts synchronously rotate.
[0018] In the above synchronous movement device applied to
dual-shaft system, the driver and the reactor have the form of a
raised section.
[0019] The driver and the reactor are respectively disposed on the
first and second shafts. The link unit includes a first main body
and a second main body movably assembled on the first and second
shafts respectively. The first and second main bodies are
respectively formed with guide grooves corresponding to the driver
and the reactor for relatively movably receiving the driver and the
reactor.
[0020] When the first shaft drives the driver to rotate, the driver
received in the guide groove of the first main body pushes the link
unit to move along the first and second shafts. At the same time,
the inner wall of the guide groove of the second main body pushes
the reactor to rotate in a direction reverse to the rotational
direction of the driver. Accordingly, the second shaft is
synchronously rotated in a direction reverse to the rotational
direction of the first shaft.
[0021] The present invention can be best understood through the
following description and accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a perspective assembled view of the synchronous
movement device of the present invention and the casing thereof, in
which the phantom lines show that the display module is closed on
the apparatus body module;
[0023] FIG. 2 is a perspective view of the synchronous movement
device of the present invention;
[0024] FIG. 3 is a perspective exploded view of the synchronous
movement device of the present invention, showing the positional
relationship among the first and second shafts, the driver, the
link unit and the reactor;
[0025] FIG. 4 is a plane view of the synchronous movement device of
the present invention, showing that the display module is closed on
the apparatus body module and the angle contained between the
display module and the apparatus body module is 0.degree.;
[0026] FIG. 5 is a plane view of the synchronous movement device of
the present invention, showing that the first shaft and the driver
are 90.degree. rotated to synchronously move the link unit, the
reactor and the second shaft; and
[0027] FIG. 6 is a plane view of the synchronous movement device of
the present invention, showing that the first shaft and the driver
are 180.degree. rotated to synchronously move the link unit, the
reactor and the second shaft.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0028] Please refer to FIGS. 1, 2 and 3. The synchronous movement
device applied to dual-shaft system of the present invention
includes a first shaft 10 and a second shaft 20. The first and
second shafts 10, 20 are assembled with each other and disposed in
a casing 55. Each of the first and second shafts 10, 20 has a fixed
end 10a, 20aand a pivoted end 10b, 20b. Through fixing seats (not
shown), the fixed ends 10a, 20a of the first and second shafts 10,
20 are respectively fixed on a display module 91 and an apparatus
body module 92 of an electronic apparatus 90 (such as a mobile
phone or a computer).
[0029] Please refer to FIGS. 2 and 3. The pivoted end 10b of the
first shaft 10 is provided with a driver 11 rotatable with the
first shaft 10. The pivoted end 20b of the second shaft 20 is
provided with a reactor 22 synchronously rotatable with the second
shaft 22. In addition, the pivoted ends 10b, 20b of the first and
second shafts 10, 20 are provided with a link unit 30 connected
with the driver 11 and the reactor 22. The driver 11, reactor 22
and the link unit 30 are assembled on the first and second shafts
10, 20 via a fixing assembly 50. When the first shaft 10 drives the
driver 11 to rotate, the link unit 30 is pushed and displaced to
forcedly rotate the reactor 22 in a direction reverse to the moving
direction of the driver 11, whereby the first and second shafts 10,
20 are synchronously rotated.
[0030] In this embodiment, the link unit 30 includes a first main
body 31 and a second main body 32 assembled on the first and second
shafts 10, 20 respectively. The first and second main bodies 31, 32
are integrally formed or connected with each other and (axially)
movable along the first and second shafts 10, 20.
[0031] To speak more specifically, the first and second main bodies
31, 32 have the form of a semicircular case. Each of the first and
second main bodies 31, 32 is formed with a cavity 31g, 32g. The
link unit 30 has a connection section 33 integrally connected
between the first and second main bodies 31, 32.
[0032] The driver 11 and the reactor 22 have the form of a raised
section. The driver 11 and the reactor 22 are respectively disposed
on the pivoted ends 10b, 20b of the first and second shafts 10, 20.
The inner walls of the cavities 31g, 32g of the first and second
main bodies 31, 32 are at least partially formed with (spiral)
guide grooves 31e, 32e corresponding to the driver 11 and the
reactor 22 in the form of a raised section. The driver 11 and the
reactor 22 are relatively movably received in the guide grooves
31e, 32e.
[0033] When the first shaft 10 drives the driver 11 to rotate, the
driver 11 received in the guide groove 31e of the first main body
pushes the link unit 30 to move along the first and second shafts
10, 20. At the same time, the inner wall of the guide groove 32e of
the second main body 32 pushes the reactor 22 to rotate in a
direction reverse to the rotational direction of the driver 11.
Accordingly, the second shaft 20 is synchronously rotated in a
direction reverse to the rotational direction of the first shaft
10.
[0034] In this embodiment, the guide groove 31e of the first main
body 31 has a spiral direction reverse to the spiral direction of
the guide groove 32e of the second main body 32.
[0035] 10
[0036] In a preferred embodiment, the synchronous movement device
of the present invention further includes a frame set 40. By means
of fixing members 41, the frame set 40 is integrally locked to
enclose and receive the driver 11, the link unit 30 and the reactor
22. In this case, the driver 11, the link unit 30 and the reactor
22 can more stably and truly operate.
[0037] Please refer to FIGS. 1 and 2 or 3 and 4, which show that
the display module 91 is closed onto the apparatus body module 92
with the angle contained therebetween 0.degree.. Please refer to
FIGS. 4 and 5, when an operator opens the display module 91 to make
the first shaft 10 drive the driver 11 to 90.degree. rotate, the
driver 11 moves to a middle section of the guide groove 31e of the
first main body to push and move the link unit 30 along the first
and second shafts 10, 20. FIG. 5 shows that the link unit 30 is
moved leftward.
[0038] When the link unit 30 is moved, the inner wall of the guide
groove 32e of the second main body 32 pushes the reactor 22 to
rotate, whereby the second shaft 20 is synchronously rotated in a
direction reverse to the rotational direction of the first shaft
10.
[0039] Please refer to FIG. 5. When the operator opens the display
module 91 to make the first shaft 10 rotate to a 90.degree.
position, the driver 11, the link unit 30 and the reactor 22
cooperate with each other to transmit the force and make the second
shaft 20 as well as the apparatus body module 92 synchronously
clockwise rotate to a 90.degree. position. That is, the display
module 91 and the apparatus body module 92 are totally relatively
rotated by 180.degree..
[0040] Referring to FIG. 6, when the operator opens and rotates the
display module 91 to a 180.degree. position, the apparatus body
module 92 is synchronously clockwise rotated to a 180.degree.
position. That is, the display module 91 and the apparatus body
module 92 are totally relatively rotated by 360.degree..
[0041] That is, by means of the synchronous movement device, a user
can operate and rotate the display module 91 by a certain angle or
range to achieve a travel double the rotational angle or range.
Accordingly, the user can more quickly and conveniently operate the
electronic apparatus.
[0042] It should be noted that during the force transmission
process of the synchronous movement device of the present
invention, the driver 11, the link unit 30 and the reactor 22 are
cooperatively assembled with each other to minimize the possibility
of torque change or slippage that often happens in the conventional
device. In this case, the first and second shafts 10, 20 can be
smoothly rotated. Moreover, once the rotational force disappears,
the rotors stop rotating to be located in a desired position.
[0043] In comparison with the conventional device, the synchronous
movement device applied to the dual-shaft system of the present
invention has the following advantages: [0044] 1. The rotary shafts
(the first and second shafts 10, 20) are the relevant components
(such as the driver 11, the link unit 30 and the reactor 22)
together form a synchronous movement mechanism. This structure is
apparently different from the conventional device, which employs
multiple gears or rollers and drive wires (or transmission belts)
for transmitting force and rotating the rotary shafts or multiple
gaskets, frictional plates and cooperative springs for storing
energy and releasing the energy. [0045] 2. The driver 11 and the
reactor 22 and the cooperative link unit 30 together form a
synchronous movement device. The synchronous movement device is
mounted between the display module 91 and the apparatus body module
92. When an operator 0.degree..about.180.degree. rotates the
display module 91, the apparatus body module 92 will synchronously
relatively rotate by 0.degree..about.180.degree.. Accordingly, the
total rotational angle of the display module 91 and the apparatus
body module 92 is 360.degree.. That is, by means of the synchronous
movement device, a user can operate and rotate the display module
91 by a certain angle or range to achieve a travel double the
rotational angle or range. Accordingly, the user can more quickly
and conveniently operate the electronic apparatus in more operation
modes (or application ranges). [0046] 3. The driver 11 and the
reactor 22 and the cooperative link unit 30 together form a
synchronous transmission structure different from the conventional
transmission mechanism and relevant cooperative structures. The
synchronous movement device of the present invention overcomes the
problem of delay of kinetic energy transmission of the conventional
wires or transmission belts. The synchronous movement device of the
present invention also solves the problem of the conventional
transmission mechanism that there is a gap between the wires and
the rollers so that the wires will slip or untruly operate. The
synchronous movement device of the present invention also solves
the problem of the conventional transmission mechanism that the
fixing structure for assembling the wires with the rollers is not
ideal so that in force transmission, the load on the wires or the
pulling force applied to the wires will increase to deteriorate the
transmission effect. [0047] 4. The driver 11 and the reactor 22 and
the cooperative link unit 30 together form a synchronous
transmission structure advantageous over the conventional
transmission mechanism in that the synchronous transmission
structure is easier to manufacture and assemble. Moreover, the
synchronous movement device or transmission mechanism of the
present invention is free from any gear for transmitting force as
in the conventional technique. Therefore, the gap between the
shafts can be as minified as possible. Therefore, the space
occupied by the entire transmission unit or structure is reduced.
Accordingly, when the transmission unit is applied to an electronic
device, the electronic device can meet the requirement for
lightweight and slimmed design.
[0048] In conclusion, the synchronous movement device applied to
the dual-shaft system of the present invention is different from
and advantageous over the conventional device.
[0049] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. Many
modifications of the above embodiments can be made without
departing from the spirit of the present invention.
* * * * *