KR20170091415A

KR20170091415A - Improved spring operation device

Info

Publication number: KR20170091415A
Application number: KR1020160012410A
Authority: KR
Inventors: 오진석; 황동익; 임형우
Original assignee: 일진전기 주식회사
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2017-08-09
Also published as: WO2017135587A1

Abstract

The objective of the present invention is to provide an improved spring operation apparatus capable of simplifying a structure thereof and reducing the size thereof. The improved spring operation apparatus for switching power of a circuit breaker comprises: an input part having an input spring; an open part having an open spring; an input operation part for operating the input part; an open operation part for operating the open part; and a driving part sequentially and repeatedly supplying driving force to the input part, wherein the opening spring can be inserted into the input spring.

Description

[0001] IMPROVED SPRING OPERATION DEVICE [0002]

The present invention relates to an improved spring operating device, and more particularly to an improved spring operating device for power switching.

Generally, a circuit breaker is a circuit in a transmission, a transformer system, or an electrical circuit. It is a device that cuts off the current when an accident such as a short circuit occurs. Odorless. The shielding part is insulated with an insulator and installed in a metal container in which a non-toxic inert and highly insulated gas is filled. Such circuit breakers can be opened and closed manually by opening or closing the transformer in normal use, or can be opened and closed remotely by an electric control device outside the metal container. In addition, the circuit breaker automatically cuts off the power during overloading and short- do.

A stationary contactor and a movable contactor are provided at the breaker of the breaker, and normally the stationary contactor contacts the movable contactor and current flows. However, when a large current flows due to an abnormality of the line, the current is isolated by separating and disconnecting them.

The breaker can be largely classified into an air operation type, a hydraulic operation type and a spring operation type according to the manner of the operation device for operating the breaker.

The air-operated actuator has a simple structure and can obtain a large driving force. However, since the compressed air is used as the power source, it is difficult to maintain the operating device and there is a disadvantage in that a performance variation occurs depending on the temperature.

Since the operation device of the hydraulic operation type is constituted of a hydraulic cylinder, a pump, and a hydraulic accumulator which are required to maintain airtightness by ultra-precision processing, the production cost is high and oil leakage occurs during long-term use, .

Since the spring-operated actuator uses the compressive force of the spring to apply or block the circuit breaker, it is easy to maintain the operation force and to manage the operation device as compared with the air and hydraulic operation mode, There is an advantage that the variation of the response time can be minimized.

According to an operation device of a general spring operation type, a breaking spring (opening spring) for moving the movable contact to open and close the electric power and a closing spring for compressing the blocking spring are provided. The operation method is as follows. After the closing spring is compressed by using the motor, the blocking spring mechanically connected to the closing spring can be compressed by using the elastic force of the spring of the closing closing spring. At this time, the movable contact mechanically connected to the blocking spring moves and contacts the fixed contact, so that the electric circuit can be connected.

However, according to the conventional manipulation device of the spring operation type, each space for disposing the interrupting spring and the closing spring is required, so that the volume of the device becomes large, which requires a large space for installing the device.

Japanese Patent No. 5468493 (Feb.

An object of the present invention is to provide an improved spring operating device capable of downsizing the size and lowering the manufacturing cost.

It is another object of the present invention to provide an improved spring operating device capable of improving durability.

It is another object of the present invention to provide an improved spring operating device which is structurally robust and can reliably block.

An improved spring operating device according to the present invention is an operating device for opening and closing a power of a breaker, comprising: a charging unit having a charging spring; An opening having an open spring; An input operation portion for operating the input portion; An open operating portion for operating the open portion; And a driving unit for sequentially and repeatedly supplying a driving force to the charging unit, wherein the opening spring can be inserted into the closing spring.

Preferably, the charging unit includes: a movable shaft rotatably coupled to a pair of support plates standing upright on a frame; A charging wheel fixedly coupled to the movable shaft; An auxiliary charging wheel fixedly coupled to the movable shaft; A closing spring link which is rotatably coupled to the charging wheel and the auxiliary charging wheel respectively and is disposed on both sides of the partition wall formed upright on the frame; A closing spring disc rotatably coupled to an end of the closing spring link; And a closing spring disposed between the closing spring disc and the partition wall.

Preferably, the one-direction rotating wheel having a sawtooth boss shape and fixedly coupled to the movable shaft; A direction restricting latch which is rotatably coupled to the support plate and whose one end is urged to abut the serrations of the one-way rotary wheel; A switch presser plate fixedly coupled to the movable shaft so as to face the one-way rotating wheel; An input restriction pin coupled to connect between the switch presser plate and the one-way rotary wheel; And a cam fixedly coupled to the movable shaft so as to be eccentric. The tooth protrusion of the unidirectional rotation is eccentric to one side, and the one-direction rotating wheel is rotatable in one direction.

Preferably, the opening includes: a slave shaft rotatably coupled to the pair of support plates; A pair of open arms fixedly coupled to the driven shafts and pin-connected to the breaker side; A pair of open spring links pivotally connected to the opening arm and passing through the partition; An open spring disk rotatably coupled to an end of the open mouth spring link; An opening spring disposed between the opening spring disk and the partition wall; A cam follower pin-coupled to be rotatable between the open arms, the cam follower being capable of being pressed by rotation of the cam in contact with the cam; And an open limiting pin coupled between the open arms.

Preferably, the closing operation portion includes a closing latch rotatably coupled to the supporting plate, the closing latch being pressed toward the switch pressing plate by a spring, and restricted in movement by a latch pin coupled to the supporting plate; And a closing coil connected to the closing latch for operating the closing latch. When the switch pressing plate is rotated, the closing limiting pin is caught by the end of the closing latch to restrict rotation, and by the operation of the closing coil The closing latch can be disengaged from the closing limiting pin and the switch pressing plate can be rotated.

Preferably, the open operating portion includes an open latch rotatably coupled to the support plate, the open latch being biased toward the open arm by a spring, and restricted in movement by a latch pin coupled to the support plate; And an open coil connected to the open latch for operating the open latch, wherein when the open arm is rotated, the open limit pin is caught by the end of the open latch to restrict rotation of the open latch, The open latch can be disengaged from the open limiting pin to rotate the open arm.

Preferably, the driving unit includes: a motor; A crankshaft having a first eccentric portion and a second eccentric portion protruding from the rotation axis direction along a circumferential direction so as to be eccentric with respect to the center of the rotation axis; A first charging latch formed with a through hole and rotatably fitted to the first eccentric portion; A second charging latch formed with a through hole and rotatably fitted to the second eccentric portion; A pressing portion having an elastic body for pressing the first charging latch and the second charging latch toward the charging wheel side; And a deceleration portion for connecting the motor and the crankshaft to transmit a driving force, wherein the charging wheel has a tooth-like shape to engage with the first charging latch and the second charging latch, and the first eccentric portion and the second charging latch 2 eccentric directions of the eccentric portions do not coincide with each other, and the serrations of the charging wheel are eccentric to one side.

Preferably, a tubular support tube is fixedly coupled to the partition wall, the support tube is inserted into the closing spring, and the opening spring is inserted into the support tube and supported.

Preferably, the damper may further include a damper pin-coupled with the open arm to mitigate the rotational impact of the open arm.

The improved spring operating device according to the present invention can reduce the operating energy of the actuator by minimizing the moving parts by coaxial arrangement of the springs, thereby making it possible to miniaturize the size, to improve the durability by simplifying the structure, There is an effect that can be lowered. In addition, since the part connected to the breaker is doubly supported and the open arm is formed of one part with various pins such as the opening limiting pin, the assembly tolerance and the elastic deformation can be minimized, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIGURES 1A-1C illustrate an improved spring manipulation apparatus in accordance with an embodiment of the present invention,
FIG. 2 is an exploded perspective view of an improved spring operating device according to an embodiment of the present invention, and FIGS. 3A and 3B are structural diagrams of an improved spring operating device according to an embodiment of the present invention.
4A is a view showing a one-way rotating wheel of an improved spring operating device according to an embodiment of the present invention,
Figure 4b shows a switch press plate of an improved spring operating device according to an embodiment of the present invention,
5 shows an open arm of an improved spring operating device according to an embodiment of the invention,
6A and 6B are views showing a driving part of an improved spring operating device according to an embodiment of the present invention, and Figs.
7A to 7D are views showing the operation of the improved spring operating device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 2 is an exploded perspective view of an improved spring manipulation apparatus according to an embodiment of the present invention, and FIGS. 3a and 3b are perspective views of an improved spring manipulation apparatus according to an embodiment of the present invention. Fig. 3 is a structural view of an improved spring operating device according to an embodiment of the present invention. Fig.

The improved spring manipulation apparatus according to an embodiment of the present invention includes a charging unit 200, an opening 300, a driving unit, a closing manipulation unit 500, and an opening manipulation unit 600.

The input unit 200 includes a closing spring 220, a closing spring link 221, a closing spring disk 222, and a switch presser plate 240.

A pair of support plates 110 are formed on the upper portion of the frame 100 and the movable shaft 210 is coupled to the pair of support plates 110 so as to be rotatable. The charging wheel 230 and the auxiliary charging wheel 231 are coupled to the movable shaft 210 so as to rotate together with the movable shaft 210 with the pair of supporting plates 110 interposed therebetween, The closing spring link 221 is coupled to the wheel 231 so as to be rotatable. At this time, the closing spring link 221 is coupled to a position eccentric to the center of the charging wheel 230 and the auxiliary charging wheel 231, and a pair of closing spring links 221 are mounted on the frame 100 The barrier ribs 120 are arranged to be sandwiched therebetween. A closing spring disk 222 is rotatably coupled to the other end of the closing spring link 221 and a closing spring 220 is disposed between the closing spring disk 222 and the partition wall 120. The support tube 130 is fixedly coupled to the partition 120 so that the support tube 130 is inserted to the insertion spring 220 so that the insertion spring 220 can be supported by the support tube 130 have. When the movable shaft 210 rotates, the charging wheel 230 and the auxiliary charging wheel 231 rotate to move the closing spring link 221 and the closing spring disc 222, which moves together with the closing spring link 221, The closing spring 220 can be urged toward the partition wall 120. [

A one-way rotating wheel 250, a switch presser plate 240, and a cam 260 are fixedly coupled to the movable shaft 210. FIG. 4A illustrates a one-directional rotating wheel of the advanced spring manipulating apparatus according to an embodiment of the present invention, in which the one-way rotating wheel 250 has a sawtooth shape and a direction limiting latch 251 And is rotatably coupled. One end of the direction limiting latch 251 is in contact with the teeth of the one-way rotary wheel 250, and the direction limiting latch 251 is urged by a spring to be forcedly contacted. The toothed portion of the one-way rotating wheel 250 is formed eccentrically to one side so that when the unidirectional rotating wheel 250 rotates in one direction, it is not limited by the direction limiting latch 251, but a rotational force is applied in the opposite direction The rotation is restricted by the directional restriction latch 251. [

4b is a view showing a switch press plate of an improved spring operation device according to an embodiment of the present invention. The switch pushing plate 240 is disposed to face the one-way rotating wheel 250 and the input restricting pin 241 is disposed between the switch pushing plate 240 and the one- And both ends thereof are coupled to the switch presser plate 240 and the one-way rotating wheel 250, respectively.

5 is a view showing an open arm of an improved spring operating device according to an embodiment of the present invention. The open portion 300 includes an open spring 320, an open spring link 321, an open spring disc 322 and an open arm 330.

A driven shaft 310 is rotatably coupled to the pair of support plates 110. A pair of open arms 330 are coupled to the driven shaft 310 so as to rotate together with the driven shaft 310 and the open spring 330 is rotatably coupled to the open spring 330. At this time, the open spring link 321 is coupled to the eccentric position with respect to the center of the opening arm 330, and is configured to penetrate the partition wall 120 to be erected and joined to the frame 100. An open spring disk 322 is rotatably coupled to the other end of the open spring link 321 and an open spring 320 is disposed between the open spring disk 322 and the partition wall 120, Is inserted into the support tube (130) so that it can be supported by the support tube (130). When the driven shaft 310 rotates, the open arm 330 rotates to move the open spring link 321 and the open spring 320 is moved by the open spring disc 322 moving together with the open spring link 321, Can be pressed toward the partition wall 120 side.

A cam follower 332 is disposed between the open arms 330, and the cam followers 332 are pin-coupled to the open arms 330 so as to be rotatable. The cam follower 332 contacts the cam 260 of the movable shaft 210 and the cam follower 332 is pressed by the rotation of the cam 260 so that the opening arm 330 can rotate. An open limiting pin 331 is disposed between the pair of open arms 330. Both ends of the open limit pin 331 are coupled to the pair of open arms 330, respectively.

The closing operation unit 500 includes a closing latch 510 and a closing coil 520. The closing latch 510 is rotatably coupled to the supporting plate 110 and is urged toward the switch pressing plate 240 by a spring. One end of the insertion latch 510 is restricted in movement by a latch pin coupled to the support plate 110. The rotation of the switch pushing plate 240 may be restricted by the closing latch 510. The rotation of the switch pushing plate 240 may be limited by the closing limit pin 241 being caught by the end of the closing latch 510 . 4B, when the switch presser plate 240 rotates in the clockwise direction, the closing limit pin 241 also moves. When the closing limit pin 241 is caught by the end of the closing latch 510, the rotation of the switch presser plate 240 Lt; RTI ID = 0.0 > 510 < / RTI >

The closing latch 510 is connected to the closing coil 520. When the closing latch 520 releases the closing latch 510 from the closing limit pin 241 and the switch pressing plate 240 rotates clockwise .

The open operating portion 600 includes an open latch 610 and an open coil 620 that is rotatably coupled to the support plate 110 and is urged by a spring to the open arm 330 side. One end of the opening latch 610 is restricted in movement by a latch pin coupled to the support plate 110. The rotational movement of the opening arm 330 can be restrained by the opening latch 610 so that when the opening arm 330 is rotated the opening limiting pin 331 is caught by the end of the opening latch 610, have. 5, when the open arm 330 rotates clockwise, the open limit pin 331 also moves. When the open limit pin 331 is caught by the end of the open latch 610, The clockwise rotation is limited by the open latch 610.

An open coil 620 is connected to the open latch 610 and when the open latch 610 rotates against the spring by the operation of the open coil 620, the open limit pin 331 is released from the open latch 610 And the release arm 330 can be rotated counterclockwise.

6A and 6B are views showing a driving unit of the improved spring operation device according to an embodiment of the present invention.

The driving unit includes a driving wheel 420 and a motor 410. The motor 410 is fixed to the frame 100 and the driving wheel 420 having a toothed shape is connected to the motor 410. [ The charging wheel 230 fixed to the movable shaft 210 has a sawtooth shape and is arranged so that the crankshaft 430 is rotatable close to the charging wheel 230. A first eccentric portion 431 and a second eccentric portion 432 are protruded from the crankshaft 430 along the circumferential direction of the crankshaft 430 in a direction perpendicular to the rotational axis of the crankshaft 430. The first eccentric portion 431 and the second eccentric portion 432 are eccentric with respect to the center of the axis of rotation of the crankshaft 430. The eccentricity of the first eccentric portion 431 and the eccentric portion 432 Direction are not coincident with each other. The first charging latch 441 and the second charging latch 442 in which the through holes are formed are rotatably fitted to the first eccentric portion 431 and the second eccentric portion 432 respectively and the first charging latch 441 And the second charging latch 442 are pressed toward the charging wheel 230 by the pressing portion 450. The ends of the first charging latch 441 and the second charging latch 442 can always contact the charging wheel 230 by being pressed by the pressing portion 450 provided with the spring. The crankshaft 430 is rotatable by the motor 410. The driving wheel 420 and the crankshaft 430 are connected to each other by a reduction portion including a reduction gear and a rotation shaft, Can be transmitted to the charging wheel (230).

When the crankshaft 430 rotates by the driving of the motor 410, the first charging latch 441 and the second charging latch 442 move, and the first eccentric portion 431 and the second eccentric portion 432, respectively. Thus, the ends of the first charging latch 441 and the second charging latch 442 engage with the teeth of the charging wheel 230 to rotate the charging wheel 230. Since the eccentric directions of the first eccentric portion 431 and the second eccentric portion 432 do not coincide with each other, the first charging latch 441 and the second charging latch 442 move so as to be tangled with each other, 230) alternately.

The teeth of the charging wheel 230 may be formed eccentrically to one side so that the charging wheel 230 can be surely engaged and rotated by the first charging latch 441 and the second charging latch 442. Accordingly, when the first charging latch 441 and the second charging latch 442 are moved forward, they can be reliably engaged with and pressed against the teeth of the charging wheel 250. On the other hand, when the first charging latch 441 and the second charging latch 442 are retracted, .

7A to 7D are views showing the operation of the improved spring operating device according to an embodiment of the present invention.

Referring to FIG. 7A, both the closing spring 220 and the opening spring 320 are in an uncompressed state and the blocking portion is opened.

7B, the driving wheel 420 and the charging wheel 410 are rotated by the operation of the motor 430 and the movable shaft 210 is rotated counterclockwise by the rotation of the charging wheel 410 . As the movable shaft 210 rotates, the input wheel 230, the one-way rotation wheel 250, the switch presser plate 240, and the cam 260 coupled to the movable shaft 210 are also rotated, The engagement spring link 221 to be engaged moves. The closing spring disk 222 is moved toward the partition wall 120 in accordance with the movement of the closing spring link 221 and the closing spring 220 is pressed by the closing spring disk 222 and the partition wall 120.

In addition, as the switch presser plate 240 rotates, the input limit pin 241 also moves. As the input wheel 230 continues to rotate, the input spring 220 moves beyond the dead point, (241) is caught by the end portion of the closing latch (510), and the rotation of the switch pushing plate (240) is stopped. At this time, the movable shaft 210 can rotate only in the counterclockwise direction by the one-way rotating wheel 250, and the closing spring 220 can not be restored and maintains the compressed charging state. The cam 260 contacting the cam follower 332 rotates together with the movable shaft 210 but the cam 260 is eccentric to one side so that the cam follower 332 is not pressed so that the opening arm 330 rotates I never do that.

7C, the closing latch 520 is operated to move the closing latch 510, the closing latch 510 is released from the closing limit pin 241, and the switch pressing plate 240 is released from the restriction. The switch pushing plate 240 is rotated by the restoring force of the spring 220. [ At this time, the cam 260 also rotates, and the cam follower 332 is pressed by the cam 260 so that the opening arm 330 rotates, and the opening spring link 321 connected to the opening arm 330 moves . The opening spring disk 322 moves toward the partition wall 120 as the opening spring link 321 moves and the opening spring 320 is pressed by the opening spring disk 322 and the partition wall 120. [ As the opening arm 330 rotates, the opening limiting pin 331 also moves, and the opening limiting pin 331 is caught by the end of the opening latch 610, so that the opening spring 320 can not be restored and remains compressed .

At this time, the opening arm 330 is connected to the movable contact side of the blocking portion, and a blocking portion connection hole 333 is formed so that it can be connected to the movable contact side by the pin. By the rotation of the opening arm 330, And a closed state in which current flows. The open latch 610 is released from the open limit pin 331 and the open arm 330 is constrained by the release latch 610. In this case, And the opening arm 330 is rotated by the restoring force of the opening spring 320. [ Thus, the blocking portion is opened to interrupt the current flow. Also, the damper 700 connected to the opening arm 330 by a pin can ensure the mechanical durability in the latter half of the opening operation and the closing operation, and can alleviate the impact force so as to prevent malfunction.

Referring to FIG. 7D, it is possible to compress the closing spring 220 so as to pressurize the opening spring 320 so as to maintain the charged state, and this process is the same as that of FIG. 7B.

The improved spring operating device according to the present invention can reduce the operating energy of the actuator by minimizing the moving parts by coaxially arranging the springs, thereby making it possible to downsize the spring. Further, the structure is simple, durability can be improved, and manufacturing cost can be reduced. In addition, since a portion connected to the breaker is doubly supported, and the opening arm is formed of a single pin and a single pin such as an opening limiting pin, the assembly tolerance and elastic deformation can be minimized, so that structurally robust and reliable blocking is possible.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.

100: frame 110: support plate
120: partition 130: support tube
200: input part 210: movable shaft
220: closing spring 221: closing spring link
222: closing spring disc 230: charging wheel
231: auxiliary charging wheel 240: switch presser plate
241: closing limit pin 250: one-way rotating wheel
251: Directional restriction latch 260: Cam
300: opening part 310:
320: open spring 321: open spring link
322: Opening spindle disk 330: Open arm
331: opening limiting pin 332: cam follower
333: Connection part of shutoff part
410: motor 420: drive wheel
430: crank shaft 431: first eccentric portion
432: second eccentric portion 441: first charging latch
442: Second charging latch 450:
500: input operation part 510: input latch
520: input coil
600: open operating part 610: open latch
620: Open coil
700: damper

Claims

An operating device for opening and closing a power of a circuit breaker,
An input portion having a closing spring;
An opening having an open spring;
An input operation portion for operating the input portion;
An open operating portion for operating the open portion; And
A drive unit for sequentially and repeatedly supplying a driving force to the input unit;
Lt; / RTI >
Wherein the opening spring is inserted and disposed in the closing spring.

The apparatus according to claim 1,
A movable shaft rotatably coupled to a pair of support plates standing upright on the frame;
A charging wheel fixedly coupled to the movable shaft;
An auxiliary charging wheel fixedly coupled to the movable shaft;
A closing spring link which is rotatably coupled to the charging wheel and the auxiliary charging wheel respectively and is disposed on both sides of the partition wall formed upright on the frame;
A closing spring disc rotatably coupled to an end of the closing spring link; And
And a closing spring disposed between the closing spring disk and the partition wall
Wherein the spring is a spring.

3. The method of claim 2,
A one-way rotating wheel having a sawtooth boss and fixedly coupled to the movable shaft;
A direction restricting latch which is rotatably coupled to the support plate and whose one end is urged to abut the serrations of the one-way rotary wheel;
A switch presser plate fixedly coupled to the movable shaft so as to face the one-way rotating wheel;
An input restriction pin coupled to connect between the switch presser plate and the one-way rotary wheel; And
A cam that is fixedly coupled to the movable shaft so as to be eccentric,
Further comprising:
Wherein the toothed portion of the unidirectional rotation is eccentric to one side so that the unidirectional rotating wheel can be rotated in one direction.

The apparatus of claim 3,
A driven shaft rotatably coupled to the pair of support plates;
A pair of open arms fixedly coupled to the driven shafts and pin-connected to the breaker side;
A pair of open spring links pivotally connected to the opening arm and passing through the partition;
An open spring disk rotatably coupled to an end of the open mouth spring link;
An opening spring disposed between the opening spring disk and the partition wall;
A cam follower pin-coupled to be rotatable between the open arms, the cam follower being capable of being pressed by rotation of the cam in contact with the cam; And
And an open limiting pin
Further comprising:

5. The apparatus according to claim 4,
An input latch rotatably coupled to the support plate and pressed by a spring toward the switch press plate and being restricted in movement by a latch pin coupled to the support plate; And
And an input coil connected to the input latch for operating the input latch,
/ RTI >
When the switch presser plate is rotated, the closing limit pin is caught by the end portion of the closing latch to restrict the rotation of the switch pressing plate. The operation of the closing coil detaches the closing latch from the closing limit pin to rotate the switch pressing plate Wherein the spring mechanism comprises:

6. The apparatus according to claim 5,
An open latch rotatably coupled to the support plate, the open latch being biased toward the open arm by a spring and being restricted in movement by a retaining pin coupled to the support plate; And
And an open coil connected to the open latch for operating the open latch,
/ RTI >
The opening limiting pin is caught by the end of the opening latch to restrict rotation when the opening arm is rotated and that the opening latch releases the opening latch by the operation of the opening coil to allow the opening arm to rotate Wherein the spring mechanism comprises:

7. The apparatus according to any one of claims 2 to 6,
motor;
A crankshaft having a first eccentric portion and a second eccentric portion protruding from the rotation axis direction along a circumferential direction so as to be eccentric with respect to the center of the rotation axis;
A first charging latch formed with a through hole and rotatably fitted to the first eccentric portion;
A second charging latch formed with a through hole and rotatably fitted to the second eccentric portion;
A pressing portion having an elastic body for pressing the first charging latch and the second charging latch toward the charging wheel side; And
A deceleration unit for connecting the motor and the crankshaft to transmit a driving force,
/ RTI >
Wherein the charging wheel has a tooth-like shape so as to engage with the first charging latch and the second charging latch, the eccentric directions of the first eccentric portion and the second eccentric portion do not coincide with each other, Is formed to be eccentric with respect to the spring.

7. The method according to any one of claims 2 to 6,
Wherein a tubular support tube is fixedly coupled to the partition wall, the support tube is inserted into the closing spring, and the opening spring can be inserted and supported in the support tube.

7. The method according to any one of claims 2 to 6,
A damper pin-coupled with the open arm to mitigate a rotational impact of the open arm;
Further comprising: