CN112647776A

CN112647776A - Intelligent lock

Info

Publication number: CN112647776A
Application number: CN202011520431.2A
Authority: CN
Inventors: 支崇铮
Original assignee: Wonly Security And Protection Technology Co ltd
Current assignee: Wonly Security And Protection Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-04-13

Abstract

The invention relates to the technical field of door locks, in particular to an intelligent lock, which comprises: the rear handle assembly is connected with the lock body through a first connecting piece and is suitable for driving a lock tongue of the lock body to move; the intelligent lock further comprises a clutch mechanism and a linkage assembly, wherein the clutch mechanism is arranged between the lock body and the rear handle assembly and used for controlling the first connecting piece to move; the linkage assembly comprises a first linkage piece, and one end of the first linkage piece is connected with the front handle assembly; according to the intelligent lock, the clutch mechanism is arranged between the lock body and the rear handle assembly, namely the clutch mechanism is arranged on the inner side of the door, personnel cannot contact the clutch mechanism, violent unlocking is avoided, the safety level is high, when the intelligent lock is in a lock closing state, the front handle assembly is in an idle state, violent unlocking cannot be achieved by prying the front handle assembly, and the safety performance of the intelligent lock is further improved; and the front handle assembly is small in size and accords with the current ultrathin design trend of the intelligent door lock.

Description

Intelligent lock

Technical Field

The invention relates to the technical field of door locks, in particular to an intelligent lock.

Background

The existing intelligent door lock is generally provided with a motor-driven clutch structure, the adopted clutch structure mainly comprises an inner panel clutch, a lock body clutch and an outer panel clutch, wherein the inner panel clutch is arranged on the inner side of a door from the clutch structure, the lock body clutch refers to a lock body with the clutch structure, and the outer panel clutch is arranged on the outer side of the door from the clutch structure.

Wherein, the outer panel separation and reunion mode of setting up does not have the influence to the lock body structure, consequently can the most lock bodies on the adaptation market, uses extensively. However, the external clutch is exposed outside the door and is easily opened violently, and the safety level is low.

Disclosure of Invention

The invention provides an intelligent lock, which aims to solve the problems that an outer panel clutch setting mode in the prior art is easily opened violently and the safety level is low.

The technical scheme of the invention is as follows:

a smart lock, comprising: the rear handle assembly is connected with the lock body through a first connecting piece and is suitable for driving a lock tongue of the lock body to move; the intelligent lock further comprises a clutch mechanism and a linkage assembly, wherein the clutch mechanism is arranged between the lock body and the rear handle assembly and used for controlling the first connecting piece to move; the linkage assembly comprises a first linkage piece, and one end of the first linkage piece is connected with the front handle assembly;

when the clutch mechanism is in a connection state, one end of the first linkage piece, which is far away from the front handle assembly, is connected with the clutch mechanism, and the first linkage piece is driven by the front handle assembly and drives the first connecting piece to act through the clutch mechanism, so that the intelligent lock is in an unlocking state; when the clutch mechanism is in a separation state, the first linkage piece is separated from the clutch mechanism, so that the intelligent lock is in a locking state.

Preferably, the first linkage passes through a first space provided on the first connecting member and is rotatable in the first space.

Preferably, the first space is a through hole, and the first linkage piece is in clearance fit with the through hole.

Preferably, the first linkage member is disposed coaxially with a central axis of the through hole.

Preferably, the linkage assembly further comprises: and the second linkage part is provided with a limit groove, and one end of the first linkage part, which is far away from the front handle assembly, is connected with the clutch mechanism through the limit groove.

Preferably, the clutch mechanism comprises a connecting pin, when the clutch mechanism is in a connected state, the connecting pin is arranged in the limiting groove, and when the clutch mechanism is in a separated state, the connecting pin is separated from the limiting groove.

Preferably, the first linkage part is provided with a limiting surface and a limiting bulge which are connected with the second linkage part, and the limiting surface is arranged along the length direction of the first linkage part and is suitable for enabling the first linkage part and the second linkage part to synchronously rotate; the limiting bulge is arranged at the end part of the first linkage piece and is suitable for limiting the first linkage piece to be separated from the second linkage piece along the central shaft of the first linkage piece.

Preferably, the handle assembly further comprises a second connecting piece, one end of the second connecting piece is connected with the front handle assembly, and the other end of the second connecting piece is connected with the first linkage piece through a limiting surface; the shielding part which is attached to the lock body is arranged on the second connecting piece and is suitable for a lock hole on the sunshade lock body.

Preferably, the clutch mechanism further includes: the second linkage piece is arranged in the accommodating cavity on the clutch seat and is rotationally connected with the clutch seat; the first connecting piece and the rear handle assembly are respectively connected with a clutch seat, and the clutch seat is suitable for driving the first connecting piece to rotate; the clutch seat is also provided with a channel for the connecting pin to pass through, and when the clutch mechanism is in a connection state, the connecting pin enters the limit groove through the channel.

Preferably, the intelligent lock further comprises a first rotation limiting part arranged on the second linkage part and a second rotation limiting part arranged on the clutch seat, wherein the first rotation limiting part is rotatably connected with the second rotation limiting part, and a rotation allowance is formed between the first rotation limiting part and the second rotation limiting part.

Preferably, the first connecting piece is provided with a first limiting part, the first limiting part is arranged in the accommodating cavity, a gap is formed between the first limiting part and the second linkage part, and the first connecting piece is further provided with a second limiting part which is connected with the lock body and is suitable for driving the lock bolt to move.

Preferably, the clutch mechanism further comprises a drive assembly comprising: the clutch seat is arranged on the mounting seat; the driving piece is arranged on the mounting seat and positioned on one side of the clutch seat, and the driving piece is connected with the connecting pin to drive the connecting pin to act.

The technical scheme of the invention has the following advantages:

1. the intelligent lock of the invention comprises: the rear handle assembly is connected with the lock body through a first connecting piece and is suitable for driving a lock tongue of the lock body to move; the intelligent lock further comprises a clutch mechanism and a linkage assembly, wherein the clutch mechanism is arranged between the lock body and the rear handle assembly and used for controlling the first connecting piece to move; the linkage assembly comprises a first linkage piece, and one end of the first linkage piece is connected with the front handle assembly;

the clutch mechanism has two states, i.e., a connected state and a disconnected state. When the clutch mechanism is in a connection state, one end, far away from the front handle assembly, of the first linkage piece is connected with the clutch mechanism, the front handle assembly is rotated, the first linkage piece is driven by the front handle assembly, and the first connection piece is driven to move through the clutch mechanism, so that the intelligent lock is in an unlocking state; when clutching mechanism was in the separation state, rotated preceding handle subassembly this moment, first linkage received preceding handle subassembly drive, because first linkage and clutching mechanism phase separation, consequently first linkage piece can't be through the indirect first connecting piece action of drive of clutching assembly, and preceding handle subassembly is in idle running state, can't realize unblanking, and this intelligence lock is in the lock state of closing this moment.

According to the intelligent lock, the off-lock mechanism is arranged between the lock body and the rear handle assembly, namely the off-lock mechanism is arranged on the inner side of the door, personnel cannot contact the off-lock mechanism, violent unlocking is avoided, the safety level is high, when the intelligent lock is in a lock closing state, the front handle assembly is in an idle state, violent unlocking cannot be achieved by prying the front handle assembly, and the safety performance of the intelligent lock is further improved.

The intelligent lock has good safety performance, the off-lock mechanism is arranged at the back of the inner side of the door, the front handle assembly is small in size, and the intelligent lock conforms to the ultrathin design trend of the existing intelligent lock.

2. According to the intelligent lock, the first space is the through hole, the first linkage piece is in clearance fit with the through hole, and the first linkage piece can rotate in the through hole due to the clearance fit. When the clutch mechanism is in a connection state, the front handle assembly is rotated, the first linkage piece is driven by the front handle assembly, the first linkage piece rotates in the through hole, then the first connection piece is driven to move through the clutch mechanism to achieve unlocking, the first linkage piece does not influence the first connection piece in the unlocking process, the first connection piece is indirectly driven through the clutch mechanism to achieve unlocking skillfully, and no requirement is required on the structure of the lock body, so that the intelligent lock disclosed by the invention is better in adaptability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a front view of the smart lock of the present invention;

FIG. 2 is a schematic structural diagram of an exploded view of the smart lock of the present invention after the mounting base is removed;

FIG. 3 is a schematic structural view of a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic view of an enlarged view of the portion P shown in FIG. 3;

FIG. 5 is a schematic structural view of an exploded view of the linkage assembly of the present invention;

fig. 6 is a schematic structural view of the clutch base and the second linkage member of the present invention.

Description of reference numerals:

1-front handle; 2-a first mandrel; 3-a lock body; 4-rear handle; 5-a second mandrel; 6-a first connector; 7-a second connector; 8-a first linkage; 9-a second linkage member; 10-a first space; 11-a first stop; 12-a second stop; 13-a limiting groove; 14-a connecting pin; 15-a limiting surface; 16-a limiting bulge; 17-a shielding; 18-a clutch seat; 19-channel; 20-a clamping part; 21-a first screw; 22-a mounting seat; 23-a drive member; 24-a spring; 25-a second screw; 26-a first rotation limiting part; 27 a second rotation restricting section; 28-arc push plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The intelligent lock of the embodiment, as shown in fig. 1-6, comprises a front handle assembly, a rear handle assembly and a lock body 3, wherein the rear handle assembly is connected with the lock body 3 through a first connecting piece 6 to drive a bolt of the lock body 3 to move;

the intelligent lock further comprises a clutch mechanism and a linkage assembly, wherein the clutch mechanism is arranged between the lock body 3 and the rear handle assembly and is used for controlling the first connecting piece 6 to move; the linkage subassembly includes first linkage 8, and the one end and the preceding handle subassembly of first linkage 8 are connected.

The intelligence lock of this embodiment still includes second connecting piece 7, and its one end is connected with preceding handle subassembly, and its other end passes through spacing face 15 and is connected with first linkage 8, in other words, first linkage 8 pass through second connecting piece 7 and preceding handle subassembly be connected. Specifically, the shielding portion 17 attached to the lock body 3 is disposed on the second connecting member 7, and the shielding portion 17 is adapted to cover the keyhole of the lock body 3.

The intelligent lock of the embodiment has an unlocking state and a locking state, the clutch mechanism has a connection state and a separation state, and the working principle of the intelligent lock of the embodiment is described below by combining the states.

When the intelligent lock is in a closed state, the clutch mechanism is in a separated state, the front handle assembly is rotated clockwise (namely the front handle assembly is pressed downwards), the first linkage piece 8 is driven by the front handle assembly, and the first linkage piece 8 cannot indirectly drive the first connecting piece 6 to move through the clutch assembly because the first linkage piece 8 is separated from the clutch mechanism, and the front handle assembly is in an idle state and cannot realize unlocking;

when the intelligent lock needs to be unlocked, the clutch mechanism acts and is switched to a connection state, specifically, one end, away from the front handle assembly, of the first linkage piece 8 is connected with the clutch mechanism, then the front handle assembly is rotated clockwise, the first linkage piece 8 is driven by the front handle assembly, and the clutch mechanism drives the first connection piece 6 to enable the lock tongue to retract, so that unlocking is achieved, namely the intelligent lock is switched from a closed state to an unlocked state;

when this intelligence lock is in the state of unblanking, clutching mechanism is in connected state, and first linkage 8 drives second linkage 9 anticlockwise rotation under the effect of handle subassembly in the front to drive first connecting piece 6 through clutching mechanism and make the spring bolt stretch out, realize closing the lock, this intelligence lock switches to the closed lock state by the state of unblanking promptly.

The intelligence lock of this embodiment locates between lock body 3 and the back handle subassembly with closing the mechanism, sets up in the door inboard promptly, and personnel's unable contact has avoided the violence to unblank, and the security level is high, and when this intelligence lock was in the closed lock state moreover, preceding handle subassembly was in idle running state, and the unable preceding handle subassembly of prying comes the violence to unblank, has further improved the security performance of this intelligence lock.

The intelligence lock of this embodiment except having good security performance, will closing the mechanism setting in the door inside back, preceding handle subassembly is small, accords with the ultra-thin design trend of present intelligence lock.

As shown in fig. 5, the first link 8 passes through a first space 10 provided on the first link 6 and can rotate in the first space 10. Specifically, the first space 10 is a through hole, the first linkage member 8 is in clearance fit with the through hole, and the first linkage member 8 is coaxially arranged with a central axis of the through hole.

When clutching mechanism is in connected state, rotate preceding handle subassembly, first linkage 8 receives preceding handle subassembly drive, first linkage 8 is at the through-hole internal rotation, drive first connecting piece 6 action through clutching mechanism then and realize unblanking, first linkage 8 does not have the influence to first connecting piece 6 at the in-process of unblanking, but very ingeniously drive first connecting piece 6 through clutching mechanism and realize unblanking, consequently, do not have the requirement to the structure of lock body 3, make the intelligence lock suitability of this embodiment better.

As an alternative embodiment of the first space 10, the first space 10 is a groove, through which the first linkage 8 passes and can rotate.

In the embodiment in which the first linkage member 8 is changeable, a second space through which the first linkage member 8 passes is provided in the lock body 3, that is, the lock body 3 needs to be modified in adaptability, and in order to adapt to most of the lock bodies 3 on the market, the first linkage member 8 may be connected to the clutch mechanism by bypassing the lock body 3.

Further, the linkage assembly further comprises a second linkage part 9, a limiting groove 13 is formed in the second linkage part, and one end, away from the front handle assembly, of the first linkage part 8 is connected with the clutch mechanism through the limiting groove 13.

Specifically, two limiting grooves 13 are symmetrically arranged, the clutch mechanism comprises a connecting pin 14, and the position of one limiting groove 13 corresponds to the position of the connecting pin 14. When the clutch mechanism is in a connected state, the connecting pin 14 is arranged in the limiting groove 13, and when the clutch mechanism is in a disconnected state, the connecting pin 14 is separated from the limiting groove 13.

As shown in fig. 3 and 5, the first linkage member 8 is provided with a limiting surface 15 and a limiting protrusion 16 connected with the second linkage member 9, and the limiting surface 15 is arranged along the length direction of the first linkage member 8 and is suitable for enabling the first linkage member 8 and the second linkage member 9 to synchronously rotate; the limiting protrusion 16 is arranged at one end of the first linkage piece 8 far away from the front handle assembly and is suitable for limiting the first linkage piece 8 to be separated from the second linkage piece 9 along the central axis of the first linkage piece 8, specifically, the first linkage piece 8 is columnar, two limiting surfaces 15 are arranged symmetrically, and the limiting surfaces 15 in the embodiment are planes or arc surfaces; the stopper projection 16 in this embodiment is cylindrical.

The clutch mechanism further comprises a clutch seat 18, and the second linkage member 9 is arranged in an accommodating cavity on the clutch seat 18 and is rotatably connected with the clutch seat 18; in assembly, the second linkage member 9 is mounted in the clutch seat 18 and the first linkage member 8 is then passed through the first and

second linkage members

8, 9 in sequence.

Further, as shown in fig. 6, the intelligent lock of the present embodiment further includes: the first rotation limiting part 26 is arranged on the second linkage part 9, the second rotation limiting part 27 is arranged on the clutch base 18, the first rotation limiting part 26 is rotatably connected with the second rotation limiting part 27, specifically, the first rotation limiting part 26 is an arc-shaped groove, and the second rotation limiting part 27 is an arc-shaped protrusion. The term "rotation allowance" means that the first rotation restricting portion 26 and the second rotation restricting portion 27 are only connected to each other in a rotatable manner, and the second rotation restricting portion 27 does not restrict the rotation of the first rotation restricting portion.

Due to the arrangement of the first rotation limiting portion 26 and the second rotation limiting portion 27, when the intelligent lock is in the unlocking state, the clutch mechanism is in the separation state, that is, the intelligent lock is switched from the closing state to the unlocking state, and after a set time period, the clutch mechanism is switched from the connection state to the separation state. Handle subassembly before the anticlockwise rotation, first linkage 8 drives 9 anticlockwise rotations of second linkage under the effect of handle subassembly in the front, can't drive separation and reunion seat 18 anticlockwise rotations through connecting pin 14 this moment, but through first limit commentaries on classics portion 26 and the 18 anticlockwise rotations of 27 drive separation and reunion seats of second limit commentaries on classics portion, separation and reunion seat 18 drives first connecting piece 6 and makes the spring bolt stretch out, realizes unblanking.

By providing the first rotation limiting portion 26 and the second rotation limiting portion 27, the frequency of driving the clutch seat 18 by the connecting pin 14 is reduced, and the abrasion between the connecting pin 14 and the arc push plate 28 of the clutch mechanism is reduced.

The first connecting piece 6 is connected with a clutch seat 18, and the clutch seat 18 is suitable for driving the first connecting piece 6 to rotate; the clutch seat 18 is also provided with a channel 19 for the connecting pin 14 to pass through, and when the clutch mechanism is in a connection state, the connecting pin 14 enters the limiting groove 13 through the channel 19.

The first connecting piece 6 is provided with a first limiting part 11, the first limiting part 11 is arranged in the accommodating cavity, and a gap is formed between the first limiting part 11 and the second linkage piece 9; the first connecting piece 6 is further provided with a second limiting part 12, the second limiting part 12 is connected with the first limiting part 11, the second limiting part 12 is connected with the lock body 3 and is suitable for driving the lock bolt to move, the first limiting part 11 is of a quadrangular prism shape, and the structural size of the first limiting part is the same as that of a square steel bar in the existing door lock so as to be matched with the existing door lock.

The clutching mechanism also includes a drive assembly that includes: the clutch seat 18 is arranged on the mounting seat 22 and is rotationally connected with the mounting seat 22; the driving member 23 is disposed on the mounting seat 22 and located at one side of the clutch seat 18, the driving member 23 is a micro motor, and is connected to the connecting pin 14 to drive the connecting pin 14 to move, in order to facilitate the resetting of the connecting pin 14, a spring 24 is further sleeved on the connecting pin 14, and a screw hole is disposed on the mounting seat 22 to mount the mounting seat 22 on a door.

Wherein, preceding handle subassembly includes preceding handle 1, first dabber 2, and one side of preceding handle 1 and first dabber 2 is connected through first screw 21, the opposite side and the 7 joints of second connecting piece of first dabber 2, and the second connecting piece is the same with the size of square billet in the current lock to the current lock of adaptation.

Wherein, back handle subassembly includes back handle 4, second dabber 5, and back handle 4 and one side of second dabber 5 are passed through second screw 25 and are connected, and the opposite side of second dabber 5 and the joint portion 20 joint on the separation and reunion seat 18.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims

1. An intelligent lock, comprising:

the lock comprises a front handle assembly, a rear handle assembly and a lock body (3), wherein the rear handle assembly is connected with the lock body (3) through a first connecting piece (6) and is suitable for driving a lock tongue of the lock body (3) to move;

the clutch mechanism is arranged between the lock body (3) and the rear handle assembly and is used for controlling the first connecting piece (6) to move;

the linkage assembly comprises a first linkage piece (8), and one end of the first linkage piece (8) is connected with the front handle assembly;

when the clutch mechanism is in a connection state, one end, far away from the front handle assembly, of the first linkage piece (8) is connected with the clutch mechanism, the first linkage piece (8) is driven by the front handle assembly, and the first connection piece (6) is driven to move through the clutch mechanism, so that the intelligent lock is in an unlocking state; when the clutch mechanism is in a separation state, the first linkage piece (8) is separated from the clutch mechanism, so that the intelligent lock is in a locking state.

2. A smart lock according to claim 1, wherein the first linkage member (8) passes through a first space (10) provided in the first connecting member (6) and is rotatable within the first space (10).

3. A smart lock according to claim 2, wherein the first space (10) is a through hole, the first linkage member (8) being a clearance fit with the through hole.

4. A smart lock according to claim 3, wherein the first linkage member (8) is arranged coaxially with the central axis of the through bore.

5. The smart lock of any one of claims 1 to 4 wherein the linkage assembly further comprises:

and the second linkage piece (9) is provided with a limiting groove (13), and one end, far away from the front handle assembly, of the first linkage piece (8) is connected with the clutch mechanism through the limiting groove (13).

6. An intelligent lock according to claim 5, wherein the clutch mechanism comprises a connecting pin (14), the connecting pin (14) is arranged inside the limiting groove (13) when the clutch mechanism is in the connected state, and the connecting pin (14) is disengaged from the limiting groove (13) when the clutch mechanism is in the disconnected state.

7. The intelligent lock according to claim 5, wherein the first linkage member (8) is provided with a limiting surface (15) and a limiting protrusion (16) connected with the second linkage member (9), the limiting surface (15) is arranged along the length direction of the first linkage member (8) and is suitable for enabling the first linkage member (8) and the second linkage member (9) to synchronously rotate; the limiting protrusion (16) is arranged at the end part of the first linkage piece (8) and is suitable for limiting the first linkage piece (8) to be separated from the second linkage piece (9) along the central shaft of the first linkage piece.

8. A smart lock according to claim 7, further comprising a second connecting member (7) having one end connected to the front handle assembly and the other end connected to the first linkage member (8) via the limiting surface (15);

the second connecting piece (7) is provided with a shielding part (17) attached to the lock body (3), and the shielding part (17) is suitable for shading the lock hole in the lock body (3).

9. The smart lock of claim 6, wherein the clutch mechanism further comprises:

the second linkage piece (9) is arranged in an accommodating cavity on the clutch seat (18) and is in rotary connection with the clutch seat (18); the first connecting piece (6) and the rear handle assembly are respectively connected with the clutch seat (18), and the clutch seat (18) is suitable for driving the first connecting piece (6) to rotate;

the clutch seat (18) is further provided with a channel (19) for the connecting pin (14) to pass through, and when the clutch mechanism is in a connection state, the connecting pin (14) enters the limiting groove (13) through the channel (19).

10. The intelligent lock according to claim 9, further comprising a first rotation limiting portion (26) arranged on the second linkage member (9), and a second rotation limiting portion (27) arranged on the clutch base (18), wherein the first rotation limiting portion (26) is rotatably connected with the second rotation limiting portion (27), and a rotation allowance exists between the first rotation limiting portion and the second rotation limiting portion (27).

11. The intelligent lock according to claim 10, wherein the first connecting member (6) is provided with a first limiting portion (11), the first limiting portion (11) is disposed in the accommodating cavity, a gap is formed between the first limiting portion and the second linkage member (9), and the first connecting member (6) is further provided with a second limiting portion (12) which is connected with the lock body (3) and is suitable for driving the lock tongue to move.

12. The smart lock of claim 11, wherein the clutch mechanism further comprises a drive assembly comprising:

the clutch seat (18) is arranged on the mounting seat (22);

the driving piece (23) is arranged on the mounting seat (22) and located on one side of the clutch seat (18), and the driving piece (23) is connected with the connecting pin (14) through an arc-shaped push plate (28) to drive the connecting pin (14) to move.