CN212389155U - Computer key - Google Patents

Abstract

The utility model is suitable for a tool to lock field discloses a computer key, include the casing, be used for carrying out the execution module of locking and unblock action and be used for control execution module's control module, execution module through first leg joint in the casing, control module through second leg joint in the casing. The utility model provides a computer key, it makes the computer key be convenient for assemble and maintain through the modular design, also can carry out solitary change to a certain module and upgrade, reduces the upgrading cost to each module all through leg joint in casing, can improve the bulk strength of each module and computer key effectively.

Description

Computer key

Technical Field

The utility model belongs to the tool to lock field especially relates to a computer key.

Background

In the maintenance and overhaul of electrical equipment, in order to avoid operation error of operating personnel, electrical equipment often can be equipped with prevents mistake operating system, utilizes this system can guarantee operating personnel's personal safety and equipment safety. In an anti-misoperation system, a computer key is generally used to operate the opening and closing of a special lock.

Computer key generally has the release mechanism and the integrated circuit module of spare part more, and is comparatively inconvenient when maintaining or upgrading the computer key to release mechanism and circuit module often all be the lug connection on the casing of computer key, intensity is not good.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of above-mentioned technical problem at least, provide a computer key, it makes the computer key be convenient for assemble and maintain through modular design, also can carry out solitary change upgrading to a certain module, reduces the upgrading cost to each module all through leg joint in casing, can improve each module and computer key's bulk strength effectively.

The technical scheme of the utility model is that: a computer key comprises a shell, an execution module and a control module, wherein the execution module is used for executing locking and unlocking actions, the control module is used for controlling the execution module, the execution module is connected to the shell through a first support, and the control module is connected to the shell through a second support.

Optionally, the control module includes a control motherboard and a battery electrically connected to the control motherboard; the front of the second support is provided with a mainboard fixing part connected with the control mainboard, and the back of the second support is provided with a battery fixing part connected with the battery.

Optionally, the control mainboard comprises an upper mainboard and a lower mainboard which are stacked, and the mainboard fixing part comprises an upper fixing part for connecting the upper mainboard and a lower fixing part for connecting the lower mainboard.

Optionally, the upper fixing part includes a positioning plate disposed at the periphery of the second bracket, an upper threaded connection part, and a positioning protrusion disposed at the top of the positioning plate; the lower floor's connecting portion include lower floor's threaded connection portion and be used for fixing a position the reference column of lower floor's mainboard, the locating plate with upper strata threaded connection portion's height all is higher than lower floor's threaded connection portion with the reference column. Optionally, the control main board is connected to the main board fixing portion by a fastener or/and a buckle.

Optionally, the battery fixing part includes a limiting plate disposed at a side of the battery, or the battery fixing part includes a limiting groove for the battery to be inserted into.

Optionally, the computer key further includes a display module stacked on the execution module and fixedly connected to the first bracket.

Optionally, the first bracket is made of metal or plastic, and/or the second bracket is made of metal or plastic.

Optionally, the execution module includes an unlocking mechanism and a locking structure for locking the unlocking mechanism, the unlocking mechanism and the locking structure are both connected to the first support, the locking structure includes a positioning pin which can stretch into the unlocking mechanism to limit the action of the unlocking mechanism and a driving member for driving the movement of the positioning pin, and the driving member is electrically connected to the control module and is controlled by the control module to start and stop.

Optionally, the unlocking mechanism comprises an unlocking rod, a transmission gear detachably connected to the periphery of the unlocking rod through a bolt, and a transmission rack in meshing transmission with the transmission gear; the transmission rack or the unlocking rod is provided with a positioning groove for the insertion of the positioning pin so as to limit the movement of the transmission rack or the unlocking rod;

the first support comprises an installation groove body for the transmission rack to slide and a fixing part rotationally connected with the unlocking rod, and the fixing part is sleeved on the periphery of the unlocking rod and connected with the installation groove body; the mounting groove body is provided with a notch for the positioning pin to pass through, and the driving piece drives the positioning pin to pass through the notch to be inserted into the positioning groove so as to limit the movement of the transmission rack.

The utility model provides a computer key through with execution module and control module modularization design, when being favorable to maintenance and upgrading, can change to a certain module to execution module and control module are respectively through first support and second leg joint in casing, can improve computer key's intensity effectively.

Drawings

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

Fig. 1 is an exploded view of a computer key according to an embodiment of the present invention;

fig. 2 is an exploded view of a control module and a second bracket of a computer key according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a second bracket of a computer key according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of another perspective view of a second bracket of a computer key according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an execution module and a first bracket of a computer key according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a first bracket of a computer key according to an embodiment of the present invention.

In the figure:

1. an execution module;

11. a first bracket; 111. a fixed part; 112. installing a groove body; 1121. an open end; 1122. a notch;

12. a latching structure; 121. a drive member; 122. positioning pins;

13. an unlocking mechanism; 131. an unlocking lever; 132. a transmission gear; 133. a drive rack; 1331. positioning a groove;

14. a display module;

15. executing the main board;

2. a control module;

21. a control main board; 211. a lower layer main board; 2111. positioning the through hole; 212. an upper layer main board; 2121. positioning the notch;

22. a battery;

23. a second bracket;

231. a main board fixing part; 2311a lower layer threaded connection; 2311b, a positioning column; 2312a, positioning a plate; 2312b, positioning a protrusion; 2312c, an upper-layer threaded connection;

232. a battery fixing portion; 2321. a limiting plate; 2322. a abdication opening is formed;

3. a housing; 31. an upper housing; 311. a display window; 32. a lower housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed or connected, or indirectly disposed or connected through intervening elements or intervening structures.

In addition, in the embodiments of the present invention, if there are terms of orientation or positional relationship indicated by "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., it is based on the orientation or positional relationship shown in the drawings or the conventional placement state or use state, and it is only for convenience of description and simplification of the description, but does not indicate or imply that the structures, features, devices or elements referred to must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The various features and embodiments described in the detailed description may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and various combinations of features/embodiments are not separately described in order to avoid unnecessary repetition in the present disclosure.

As shown in fig. 1, the embodiment of the present invention provides a computer key, including casing 3, an execution module 1 for executing locking and unlocking actions and a control module 2 for controlling execution module 1, execution module 1 and control module 2 can be respectively disposed at different positions in casing 3, and realize transmission of instruction and data through electric connection or wireless connection, so that execution module 1 can execute locking, unlocking or other actions under control of control module 2, it should be explained that, in this embodiment, the unlocking action of execution module 1 refers to unlocking and locking the lock, and the execution locking of execution module 1 refers to locking execution module 1 itself, so that execution module 1 cannot unlock or lock the lock. The modularized design of the computer key can simplify the assembly of the computer key on one hand and facilitate the assembly and disassembly during production and maintenance; on the other hand, replacement maintenance or replacement upgrading can be performed on the specific module, so that the cost in maintenance and upgrading is reduced. In this embodiment, the execution module 1 and the control module 2 are respectively located in the upper half portion and the lower half portion of the housing 3, and the execution module 1 and the control module 2 may be adjacently disposed up and down, in other embodiments, the execution module 1 and the control module 2 may also be disposed in the left half portion and the right half portion of the housing 3, or both of them are stacked, that is, the execution module 1 and the control module 2 are layered. Execution module 1 is connected in casing 3 through first support 11, control module 2 is connected in casing 3 through second support 23, casing 3 in this embodiment includes upper housing 31 and lower casing 32, execution module 1 and control module 2 are connected in lower casing 32 through first support 11 and second support 23 respectively, lower casing 32 and upper casing 31 involution and pass through fastener or buckle fixed connection, thereby limit execution module 1 and control module 2 in casing 3, compare with the direct technical scheme who connects each part in casing 3 through the fastener in the prior art, this embodiment connects execution module 1 and control module 2 respectively in casing 3 through first support 11 and second support 23, can improve execution module 1, control module 2 and the holistic intensity of computer key effectively. Of course, in other embodiments, the execution module 1 and the control module 2 may also be connected to the upper casing 31, or the execution module 1 and the control module 2 may be connected to the upper casing 31 and the lower casing 32 respectively, and then combined and fixed by the upper casing 31 and the lower casing 32.

Specifically, as shown in fig. 1 and 2, the control module 2 includes a control main board 21 and a battery 22 electrically connected to the control main board 21, a main board fixing portion 231 connected to the control main board 21 is provided on a front surface of the second bracket 23, and a battery fixing portion 232 connected to the battery 22 is provided on a rear surface of the second bracket 23. Referring to fig. 2, the control main board 21 and the battery 22 are respectively connected to the upper and lower surfaces of the second bracket 23, that is, the second bracket 23 separates the battery 22 from the control main board 21, which is beneficial to heat dissipation of the battery 22 and the control main board 21, avoids heat concentration, and also facilitates assembly and maintenance of the battery 22 or the control main board 21. In the present embodiment, the battery 22 is located at a lower layer (close to the lower case 32), the control main board 21 is located at an upper layer (close to the upper case 31), and the second bracket 23 is fixedly attached to the lower case 32 by a fastener.

Specifically, the control main board 21 is connected to the main board fixing portion 231 through a fastener or/and a buckle, in this embodiment, referring to fig. 2, the control main board 21 is of a double-layer main board design, and includes a lower main board 211 close to the second bracket 23 and an upper main board 212 close to the upper housing 31, and the main board fixing portion 231 includes a lower fixing portion connected to the lower main board 211 and an upper fixing portion connected to the upper main board 212; referring to fig. 3, the lower fixing portion includes a lower threaded connection portion 2311a for connecting with a fastener and a positioning column 2311b for positioning the lower main board 211, a positioning through hole 2111 (see fig. 2) for allowing the positioning column 2311b to be inserted is formed in the lower main board 211, the lower main board 211 is limited to the second bracket 23 after the positioning column 2311b is inserted through the positioning through hole 2111, and then the lower main board 211 is fixed to the lower threaded connection portion 2311a through the fastener. Referring to fig. 3, the upper fixing portion includes a positioning plate 2312a and an upper threaded portion 2312c disposed at the periphery of the second bracket 23, and the positioning plate 2312a and the upper threaded portion 2312c are higher than the lower threaded portion 2311a and the positioning post 2311b, so that the lower fixing portion does not interfere with the installation of the upper main board 212 after the lower main board 211 is installed; the positioning plate 2312a is provided at the top thereof with positioning protrusions 2312b, the upper main plate 212 is provided with positioning notches 2121 which are engaged with the positioning protrusions 2312b, the upper main plate 212 is overlapped on the top of the positioning plate 2312a and the positioning notches 2121 are snapped into the positioning protrusions 2312b, and then the upper main plate 212 is fixed to the upper threaded connection 2312c by using fasteners. Such design can be with two-layer mainboard difference fixed connection in second support 23, can have certain clearance simultaneously between upper mainboard 212 and the lower floor's mainboard 211, under the prerequisite that reduces occupation space, makes multilayer control mainboard 21 have good radiating effect.

In a specific application, if the control main board 21 adopts a single-layer main board design, it can be directly connected to the main board fixing portion 231 through a fastener or/and a buckle.

Specifically, as shown in fig. 2 and fig. 4, as a first possible implementation manner of the battery fixing portion 232 in this embodiment, the battery fixing portion 232 may include a limiting plate 2321 disposed on a side surface of the battery 22, and the limiting plate 2321 may be disposed on multiple side surfaces of the battery 22, in this embodiment, the limiting plate 2321 is disposed on four sides (four side surfaces) of the battery 22, and corresponding abdicating openings 2322 are disposed at a connection position of the battery 22 and the control main board 21 and a corresponding position where the second bracket 23 is connected to the lower housing 32, so that a connection line between the battery 22 and the control main board 21 and a fastener for fixing the second bracket 23 to the lower housing 32 pass through the abdicating opening 2322, and when the battery 22 is disassembled, a disassembling tool may be used to pry and disassemble the battery 22 through the abdicating opening 2322, which is favorable for disassembling the control.

In a specific application, as a second possible implementation manner of the battery fixing portion 232 in this embodiment, the battery fixing portion 232 may also include a limiting groove for inserting the battery 22, that is, a plurality of limiting plates 2321 form a limiting groove with an opening on one side of the back surface of the second bracket 23, and the battery 22 may be inserted into the limiting groove through the opening, so that the battery 22 may be stably connected to the second bracket 23 through the limiting groove.

In a specific application, a buffer member or an elastic member may be disposed on a side surface of the limiting plate 2321, and the battery 22 is connected to the limiting plate 2321 or the limiting groove through the buffer member or the elastic member in an interference manner. A heat sink may be provided on the surface of the battery 22 to which the second holder 23 is bonded, to improve the heat dissipation effect of the battery 22, such as a graphite sheet, a copper foil, or silicone grease.

Specifically, the second bracket 23 may be made of metal, and the second bracket 23 may be made of metal with high strength and good heat conduction effect, such as aluminum, iron, copper, and alloy thereof, which may further enhance the strength of the computer key, and further improve the heat dissipation effect of the battery 22 and the control motherboard 21. Of course, in other embodiments, the second bracket 23 may be made of plastic.

Specifically, as shown in fig. 1, the computer key further includes a display module 14 stacked with the execution module 1, the display module 14 is connected to the first bracket 11, the display module 14 is located above the execution module 1 and faces the upper housing 31, a display window 311 is disposed at a position of the upper housing 31 corresponding to the display module 14, and an operator can view contents displayed in the display module 14 through the display window 311.

Specifically, as shown in fig. 5, the execution module 1 includes an unlocking mechanism 13 and a locking structure 12 for locking the unlocking mechanism 13, the unlocking mechanism 13 can perform unlocking and locking actions on the lock, and the locking structure 12 can lock the unlocking mechanism 13, so that the unlocking mechanism 13 cannot perform unlocking and locking actions on the lock; the unlocking mechanism 13 and the locking structure 12 are both connected to the first support 11, the locking structure 12 includes a positioning pin 122 and a driving member 121 for driving the positioning pin 122 to move, the positioning pin 122 can extend into the unlocking mechanism 13 under the driving of the driving member 121 to limit the unlocking mechanism 13 to perform unlocking action or locking action on the lock, the driving member 121 can be electrically connected to the control module 2 and is controlled by the control module 2 to start and stop, so that the control module 2 can drive the positioning pin 122 through controlling the driving member 121, and thus locking and unlocking of the unlocking mechanism 13 are realized. In this embodiment, the driving element 121 may be electrically connected to the execution motherboard 15 disposed between the display module 14 and the execution module 1, and then connected to the control module 2 through the execution motherboard 15, the operation information is processed by the control module 2, and then changed into a corresponding operation instruction to be sent to the execution motherboard 15, and then the execution motherboard 15 executes a corresponding operation on the driving element 121 according to the operation instruction. In a specific application, the driving member 121 may also be directly electrically connected to the control module 2, and the control module 2 directly controls the driving member 121.

Specifically, as shown in fig. 5, the unlocking mechanism 13 includes an unlocking rod 131, a transmission gear 132 sleeved on the periphery of the unlocking rod 131, and a transmission rack 133 in meshing transmission with the transmission gear 132, the transmission rack 133 can drive the unlocking rod 131 to rotate through the transmission gear 132 so as to unlock the lock, the transmission rack 133 is provided with a positioning slot 1331, and the positioning pin 122 can be inserted into the positioning slot 1331 under the driving of the driving member 121, so as to limit the movement of the transmission rack 133, thereby locking the unlocking mechanism 13.

In a specific application, the positioning slot 1331 may also be disposed on the unlocking lever 131, that is, the positioning pin 122 is inserted into the positioning slot 1331 of the unlocking lever 131 under the driving of the driving member 121, so as to directly limit the rotation of the unlocking lever 131, thereby locking the unlocking mechanism 13.

In a specific application, the driving member 121 may be an electromagnetic driving member, and the positioning pin 122 may perform a telescopic motion under the driving of the electromagnetic driving member, of course, the driving member 121 may also be a motor driving member, and the positioning pin 122 may rotate into the positioning slot 1331 under the driving of the motor driving member.

Specifically, as shown in fig. 5 and 6, the first bracket 11 includes a mounting groove 112 for sliding the driving rack 133 and a fixing portion 111 rotatably connected to the lock release lever 131. In this embodiment, the fixing portion 111 is cylindrical and is sleeved on the periphery of the unlocking rod 131, and one end of the fixing portion 111 is connected to the installation groove 112 and is perpendicular to the installation groove 112. The transmission gear 132 is located at one end of the unlocking rod 131 close to the installation slot 112, and is meshed with the transmission rack 133 located in the installation slot 112, the installation slot 112 is strip-shaped, one end of the installation slot 112 is an open end 1121, and the transmission rack 133 can pass through the open end 1121 to slide in the installation slot 112, and drives the unlocking rod 131 to rotate through the transmission gear 132. The width of the installation slot 112 is slightly wider than the width of the transmission rack 133, and the transmission rack 133 can only move along the length direction of the installation slot 112, so that the transmission rack 133 and the transmission gear 132 are always meshed and connected. The driving member 121 and the positioning pin 122 are disposed on one side of the installation slot body 112, and the installation slot body 112 is provided with a notch 1122 for the positioning pin 122 to pass through on the side, so that the driving member 121 can drive the positioning pin 122 to pass through the notch 1122 and be inserted into the positioning slot 1331, thereby limiting the movement of the transmission rack 133, and making the transmission rack 133 unable to slide in the installation slot body 112.

In a specific application, the positioning slot 1331, the positioning pin 122 and the driving member 121 may also be disposed at other positions, for example, the positioning slot 1331 may also be disposed at one side of the transmission rack 133 close to the bottom of the installation slot body 112, and a corresponding notch is disposed at the bottom of the installation slot body 112, so that the driving member 121 can drive the positioning pin 122 to extend into the positioning slot 1331 from the notch, and the movement of the transmission rack 133 is limited.

Specifically, as shown in fig. 5, one end of the driving rack 133 is provided with a return structure, and the return structure includes a return spring (not shown) having one end connected to the driving rack 133 and the other end connected to the side wall of the installation slot 112. In an initial state, the positioning pin 122 passes through the notch 1122 and is inserted into the positioning slot 1331, and when the control module 2 controls the driving member 121 to drive the positioning pin 122 to retract from the positioning slot 1331, the transmission rack 133 can apply force to compress the return spring and slide to one end of the installation slot body 112, so as to drive the unlocking rod 131 to rotate and unlock; after the unlocking is completed and the external force is removed, the driving rack 133 is reset under the action of the reset spring, and at this time, the control module 2 can control the driving member 121 to drive the positioning pin 122 to pass through the notch 1122 and be inserted into the positioning slot 1331, so as to lock the driving rack 133.

Specifically, as shown in fig. 5, the transmission gear 132 is detachably connected to the lock release lever 131 through a connection structure. When the unlocking rod 131 needs to unlock different locks or needs to adjust the rotation angle due to other reasons, the original transmission gear 132 is detached from the unlocking rod 131 only through the connecting structure, the new transmission gear 132 with the same inner diameter and different other parameters is replaced, the transmission ratio between the transmission gear 132 and the transmission rack 133 can be adjusted by replacing the transmission gear 132 with different tooth numbers, so that the torsion of the unlocking rod 131 is adjusted, the different locks are adapted, the transmission rack 133 can be replaced or the original transmission rack 133 can be processed as necessary, such as polishing, cutting processing and the like, and the novel transmission gear 132 is adapted to the novel transmission gear 132. And after the computer key is used for a long time, the transmission gear 132 is abraded, and at the moment, the transmission gear 132 can be detached through the connecting structure and replaced by a new transmission gear 132.

Specifically, as shown in fig. 5, as a first possible implementation manner of the connection structure in the embodiment, the connection structure includes a latch, the center of the transmission gear 132 has an inner hole, the unlocking rod 131 can pass through the inner hole to sleeve the transmission gear 132 on the outer periphery side of the unlocking rod 131, then the latch is inserted into the transmission gear 132 and the unlocking rod 131 in the radial direction, so that the transmission gear 132 is connected to the unlocking rod 131, and when detaching, the latch is only required to be pulled out, so that the transmission gear 132 can be detached simply and quickly. In specific application, the latch and the transmission gear 132 and the unlocking rod 131 can be in interference fit or clearance fit, and fastening glue can be coated according to requirements to enhance the connection strength.

Specifically, as a second possible implementation manner of the connection structure in the embodiment, the connection structure may also include a threaded connection structure disposed between the transmission gear 132 and the unlocking lever 131, that is, the transmission gear 132 is threaded to the unlocking lever 131. In a specific application, when the driving rack 133 moves, the torque generated to the driving gear 132 will be much smaller than the friction force between the driving gear 132 and the unlocking rod 131, that is, when the driving rack 133 slides relative to the driving gear 132, the driving gear 132 and the unlocking rod 131 will not be loosened.

The embodiment of the utility model provides a computer key, through with execution module 1 and control module 2 modularized design, change when being favorable to maintaining, and execution module 1 and control module 2 are connected in casing 3 through first support 11 and second support 23 respectively, can improve computer key's intensity effectively; the control mainboard 21 and the battery 22 in the control module 2 are separated by the first support 11, so that the maintenance and the replacement are convenient, and the heat dissipation effect of the control mainboard 21 and the battery 22 can be improved to improve the reliability of the computer key.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims (10)

1. A computer key is characterized by comprising a shell, an execution module and a control module, wherein the execution module is used for executing locking and unlocking actions, the control module is used for controlling the execution module, the execution module is connected to the shell through a first support, and the control module is connected to the shell through a second support.

2. The computer key of claim 1, wherein the control module comprises a control motherboard and a battery electrically connected to the control motherboard; the front of the second support is provided with a mainboard fixing part connected with the control mainboard, and the back of the second support is provided with a battery fixing part connected with the battery.

3. The computer key of claim 2, wherein the control motherboard comprises an upper motherboard and a lower motherboard stacked, and the motherboard fixing portion comprises an upper fixing portion for connecting the upper motherboard and a lower fixing portion for connecting the lower motherboard.

4. The computer key of claim 3, wherein the upper fixing portion comprises a positioning plate disposed at the periphery of the second bracket, an upper threaded connecting portion, and a positioning protrusion disposed at the top of the positioning plate; the lower fixing part comprises a lower threaded connecting part and a positioning column used for positioning the lower mainboard, and the positioning plate and the upper threaded connecting part are higher than the lower threaded connecting part and the positioning column.

5. The computer key as claimed in claim 2, wherein said control board is connected to said board fixing portion by a fastener or/and a snap.

6. The computer key of claim 2, wherein the battery fixing portion comprises a limiting plate disposed at a side surface of the battery, or the battery fixing portion comprises a limiting groove for inserting the battery.

7. The computer key of claim 1, further comprising a display module stacked with the execution module and fixedly connected to the first bracket.

8. The computer key of claim 1, wherein said first support is made of metal or plastic and/or said second support is made of metal or plastic.

9. The computer key of any one of claims 1 to 8, wherein the execution module comprises an unlocking mechanism and a locking structure for locking the unlocking mechanism, the unlocking mechanism and the locking structure are both connected to the first bracket, the locking structure comprises a positioning pin which can be inserted into the unlocking mechanism to limit the action of the unlocking mechanism, and a driving member for driving the positioning pin to move, and the driving member is electrically connected to the control module and is controlled by the control module to start and stop.

10. The computer key of claim 9, wherein the unlocking mechanism comprises an unlocking rod, a transmission gear detachably connected to the periphery of the unlocking rod through a plug pin, and a transmission rack in meshing transmission with the transmission gear; the transmission rack or the unlocking rod is provided with a positioning groove for the insertion of the positioning pin so as to limit the movement of the transmission rack or the unlocking rod;

the first support comprises an installation groove body for the transmission rack to slide and a fixing part rotationally connected with the unlocking rod, and the fixing part is sleeved on the periphery of the unlocking rod and connected with the installation groove body; the mounting groove body is provided with a notch for the positioning pin to pass through, and the driving piece drives the positioning pin to pass through the notch to be inserted into the positioning groove so as to limit the movement of the transmission rack.

Images