CN216974433U - Anti-theft lock - Google Patents

Abstract

The utility model discloses an anti-theft lock which is characterized by comprising a lock shell and an inclined bolt, wherein an inclined bolt sliding sheet is connected with the inclined bolt; the first square tongue is connected with a square tongue sliding sheet; handle side cover twists the hand side cover including interior side cover, foreign side cover and central spacer, is connected with spacing piece, wherein, lock shell sliding connection has the driving medium, it is connected with the side cover driving piece to twist the hand side cover, driving medium one end connect in central spacer, the other end are provided with the drive block, and the drive block can the butt the side cover driving piece works as interior side cover rotates, the driving medium drives the side cover driving piece and rotates, the side cover driving piece drives it rotates to twist the hand side cover. Under the prerequisite of having guaranteed the theftproof function, let the user when emergency, can directly realize oblique spring bolt, the unblock of first spring bolt simultaneously through rotating handle square sleeve, promoted user's use and experienced.

Description

Anti-theft lock

Technical Field

The utility model relates to the technical field of hardware locks, in particular to an anti-theft lock.

Background

The current lock is for playing the theftproof function, generally all can lock from indoor and play pick-proof, theftproof effect through addding the spring bolt, and this type of big lock theftproof is all very strong, but when the user need open the door promptly in the special circumstances, need to twist the hand with the key or twist and open the spring bolt of locking and further open the door again, and establish the emergency exits in addition and increase unnecessary cost and stolen risk, very influence user experience.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an anti-theft lock which can be unlocked by a user directly by rotating a handle from the indoor in an up-locking state.

An anti-theft lock according to an embodiment of a first aspect of the utility model comprises: a lock case; the inclined lock tongue is connected with an inclined tongue sliding sheet, and the inclined tongue sliding sheet is connected to the lock shell in a sliding mode so as to push the inclined lock tongue to extend out or retract; the first square tongue is connected with a square tongue sliding sheet, and the square tongue sliding sheet is connected to the lock shell in a sliding mode so as to push the first square tongue to extend out or retract; the handle square sleeve comprises an inner square sleeve, an outer square sleeve and a central spacer, the inner square sleeve, the outer square sleeve and the central spacer are rotatably connected to the lock shell, the inner square sleeve is fixedly connected with the central spacer, and the inner square sleeve and the outer square sleeve are both provided with oblique bolt shifting pieces so as to drive the oblique bolt to retract; the square handle sleeve is rotatably connected to the lock shell, the square handle sleeve is connected with a limiting piece, the square tongue sliding piece is provided with a yielding groove, the yielding groove is provided with a first groove wall and a second groove wall, the limiting piece is clamped into the yielding groove, and the limiting piece pushes the square tongue sliding piece to move through the first groove wall so as to push the first square tongue to extend out; wherein, lock shell sliding connection has the driving medium, the lock shell is connected with the square sleeve driving plate, driving medium one end connect in central spacer, the other end are provided with the driving block, the driving block can the butt the square sleeve driving plate, works as interior square sleeve rotates, the driving medium drives the square sleeve driving plate and rotates, the square sleeve driving plate drives the square sleeve of twisting the hand rotates, spacing piece passes through the second cell wall promotes the square tongue gleitbretter removes, in order to drive first side tongue retracts.

The anti-theft lock provided by the embodiment of the utility model at least has the following beneficial effects: when a user closes the door, the inclined bolt impacts the door frame, the inclined surface of the inclined bolt is driven by the sliding sheet of the inclined bolt to retract into the lock shell instantly under the action of the pressure of the door frame, and the inclined bolt extends out to realize locking when reaching the position of the lock slot. The user operates the wrench square sleeve to rotate to drive the limiting piece to rotate so as to drive the first square tongue to extend out, so that locking is realized, and the anti-theft effect of the anti-theft lock is improved. Interior square sleeve in the handle square sleeve, the foreign side cover all has the square sleeve plectrum in order to drive oblique spring bolt withdrawal, let the user all accessible rotate the handle square sleeve and let oblique spring bolt withdraw realize opening the door in the door or outdoors, and the user is locking the back, indoor, the accessible rotates interior square sleeve, interior square sleeve further and drive central spacer and rotate, central spacer drives the driving medium motion, further drive the drive block butt square sleeve driving piece and rotate, the square sleeve driving piece drives spacing piece contact second cell wall, let first square bolt withdrawal, realize the user in emergency with the time, directly realize oblique spring bolt through rotating interior square sleeve indoor, first square bolt withdrawal simultaneously, need not unnecessary step of unblanking, conveniently flee, and then user's use experience has been promoted.

According to some embodiments of the utility model, the square sleeve of the wrench has a circular outer circumference, the square sleeve driving piece has a circular arc shape, the radius of the square sleeve driving piece is larger than that of the square sleeve of the wrench, one end of the square sleeve driving piece is rotatably connected to the lock case, and the other end of the square sleeve driving piece abuts against the limiting piece.

According to some embodiments of the utility model, the limiting piece is connected with a limiting torsion spring, and the limiting torsion spring is fixedly connected with the lock shell.

According to some embodiments of the utility model, the lock case is slidably connected with a sliding block, the sliding block is fixedly connected with a second square tongue, and the sliding block is used for pushing the second square tongue to extend or retract.

According to some embodiments of the utility model, the slide block is provided with a positioning groove, the positioning groove is rotatably connected with a positioning column, the transmission member is provided with a straight groove, the positioning column abuts against a groove wall of the straight groove, and preferably, a side wall of the positioning column is just tightly attached to the groove wall of the straight groove. When the second square tongue extends out, the groove wall transmission part of the positioning column inclines to drive the transmission part to be separated from the square sleeve driving piece.

According to some embodiments of the utility model, the slider is provided with a driving groove, a movable driving plate is connected in the driving groove, the lock shell is provided with a positioning groove, the center of the positioning groove is provided with a limit inclined plate, and two sides of the limit inclined plate form a locking groove and an unlocking groove which are matched with the driving plate.

According to some embodiments of the utility model, a lock cylinder is connected to the lock housing, the lock cylinder having a paddle capable of abutting a slot wall of the drive slot and the drive plate.

According to some embodiments of the utility model, the poking piece can abut against the transmission piece, and when the lock cylinder rotates, the transmission piece moves to drive the inclined lock tongue and the first square tongue to retract.

According to some embodiments of the utility model, the deadbolt slide is provided with a guide slot, and the lock housing is fixedly connected with a positioning shaft abutting against a slot wall of the guide slot to define a moving direction of the deadbolt.

According to some embodiments of the utility model, the lock shell is provided with a positioning plate, the positioning plate is connected with a reset rod, the reset rod is provided with 2 reset plates, the reset plates are respectively abutted against the inner square sleeve and the outer square sleeve, the positioning plate is connected with a square sleeve reset spring, and one end of the square sleeve reset spring is connected with the reset plate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a cross-sectional view of an anti-theft lock of an embodiment of the present invention;

FIG. 2 is an exploded view of the anti-theft lock of the embodiment of the present invention;

FIG. 3 is a schematic view of a lock housing of the anti-theft lock of the embodiment of the present invention;

fig. 4 is a cross-sectional view of the anti-theft lock according to the embodiment of the utility model, when the first and second tongues are extended.

Reference numerals: the lock comprises a lock shell 100, an oblique bolt 110, an oblique bolt sliding sheet 111, a guide groove 112, a positioning shaft 113, a first square bolt 120, a square bolt sliding sheet 121, a first groove wall 122, a second groove wall 123, a second square bolt 130, a sliding block 131, a driving groove 132, a driving plate 133, a handle square sleeve 200, an inner square sleeve 210, an outer square sleeve 220, a central spacer 230, a driving piece 240, a driving block 241, a straight groove 242, a positioning column 243, a reset rod 250, a reset spring 251, a wrench square sleeve 300, a limiting sheet 310, a limiting torsion spring 311, a square sleeve driving sheet 320, a lock cylinder 400, a shifting sheet 410, a positioning groove 500, a limiting oblique plate 510, an upper locking groove 520 and an unlocking groove 530.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, the anti-theft lock provided by the utility model comprises: the lock shell 100 and the oblique bolt 110 are connected with an oblique bolt sliding sheet 111, and the oblique bolt sliding sheet 111 is connected with the lock shell 100 in a sliding mode so as to push the oblique bolt 110 to extend or retract. When a user closes the door, the inclined bolt 110 strikes the door frame, the inclined surface of the inclined bolt 110 is pressed by the door frame, is driven by the inclined bolt sliding sheet 111 to retract into the lock case 100 instantly, and extends out to lock when reaching the position of the lock slot. The lock further comprises a first square tongue 120 connected with a square tongue sliding piece 121, and the square tongue sliding piece 121 is connected to the lock shell 100 in a sliding mode so as to push the first square tongue 120 to extend out or retract, a user can select to lock the lock, and the anti-theft effect of the square tongue is better.

Referring to fig. 1, the anti-theft lock of the present invention further includes a handle square sleeve 200, which includes an inner square sleeve 210, an outer square sleeve 220 and a central spacer 230, wherein the inner square sleeve 210 and the outer square sleeve 220 are both rotatably connected to the lock case 100, the inner square sleeve 210 is fixedly connected to the central spacer 230, specifically, the central spacer 230 has an opening, the inner square sleeve 210 has an installation shaft, the central spacer 230 is sleeved on the installation shaft and then fixed to the inner square sleeve 210 by a fastener, and when the inner square sleeve 210 rotates, the central spacer 230 also rotates. The inner square sleeve 210 and the outer square sleeve 220 are both provided with an inclined bolt shifting piece 410 to drive the inclined bolt 110 to retract, and a user can rotate the handle square sleeve 200 to retract the inclined bolt 110 to open the door both inside and outside the door. The lock also comprises a square handle sleeve 300 which is rotatably connected with the lock shell 100. The wrench square sleeve 300 is connected with a limiting piece 310, the square tongue sliding piece 121 is provided with a yielding groove, the yielding groove is provided with a first groove wall 122 and a second groove wall 123, when the limiting piece 310 contacts the first groove wall 122, the first square tongue 120 extends out, and when the limiting piece 310 contacts the second groove wall 123, the first square tongue 120 retracts. Specifically, the limiting piece 310 is fixed on the square sleeve 300, so that a user can rotate the square sleeve 300 indoors by turning the square sleeve 300 by a wrench, and then rotate the limiting piece 310, and the user operates the limiting piece 310 to rotate towards the first tongue 120, so that the limiting piece 310 contacts the first groove wall 122 and pushes the tongue sliding piece 121 to extend out, thereby realizing locking. When the user operates the limiting piece 310 to rotate towards the lock case 100, the limiting piece 310 will contact the second groove wall 123 to push the latch sliding piece 121 to retract, thereby unlocking the lock.

Wherein, the lock shell 100 is slidably connected with a transmission piece 240, the square sleeve 300 of the wrench is provided with a square sleeve driving piece 320, one end of the transmission piece 240 is connected with the central spacer 230, the other end of the transmission piece is provided with a driving block 241, the driving block 241 can abut against the square sleeve driving piece 320, specifically, the connection mode of the transmission piece 240 and the central spacer 230 is hinged, only vertical shearing force is transmitted, bending moment is not transmitted, and the connection enables the transmission piece 240 to rotate without restriction. When the inner square sleeve 210 rotates, the transmission piece 240 drives the square sleeve driving piece 320 to rotate, the square sleeve driving piece 320 drives the wrench square sleeve 300 to rotate, the limiting piece 310 contacts with the second groove wall 123 to drive the first square bolt 120 to retract, and it can be understood that after locking, a user can drive the central spacer 230 to rotate by rotating the inner square sleeve 210 in the door, the central spacer 230 drives the transmission piece 240 to move, the driving block 241 is further driven to abut against the square sleeve driving piece 320 to rotate, the square sleeve driving piece 320 drives the limiting piece 310 to contact with the second groove wall 123, so that the first square bolt 120 retracts, and therefore, in an emergency, the user can directly retract the inclined bolt 110 and the first square bolt 120 through rotating the inner square sleeve 210 indoors, the unlocking step of the anti-theft door is simplified, and the use experience of the user is improved.

Referring to fig. 1 and 2, the square wrench sleeve 300 has a circular periphery and the square wrench driving plate 320 has a circular arc shape, and it can be understood that the square wrench sleeve 300 has a circular periphery to allow a user to rotate the square wrench sleeve 300 and further rotate the limiting plate 310 more conveniently. The driving block 241 is abutted against the periphery of the square sleeve driving piece 320, the tangential direction of the tail end of the square sleeve driving piece 320 is perpendicular to the limiting piece 310, one end of the square sleeve driving piece 320 is rotatably connected to the lock shell 100, and the other end of the square sleeve driving piece 320 is abutted against the limiting piece 310. When the driving block 241 moves, the square sleeve driving piece 320 is driven to move, the tangential direction of the tail end of the square sleeve driving piece 320 is taken as the initial speed direction, the action of the conduction force can be furthest performed, the limiting piece 310 is driven to move, and then the first square tongue 120 is driven to retract, so that unlocking is realized. The radius of the square sleeve driving piece 320 is larger than that of the square sleeve 300 of the wrench, preferably, the difference between the radius of the square sleeve driving piece 320 and the radius of the square sleeve 300 of the wrench just enables the inner circumference of the square sleeve driving piece 320 to wrap the outer circumference of the square sleeve 300 of the wrench when the first square tongue 120 retracts, so that the structure of the whole lock body is more compact, and the connection between the mechanisms is more stable.

Referring to fig. 1 and 4, according to some embodiments of the present invention, the position-limiting torsion spring 311 is connected to the position-limiting plate 310, and specifically, one end of the position-limiting torsion spring 311 is fixed to the lock housing 100, and the other end is fixed to the position-limiting plate 310, and when the position-limiting plate 310 moves under the driving of the wrench square sleeve 300, the position-limiting torsion spring 311 elastically deforms along with the movement of the position-limiting plate 310, and generates an elastic force on the position-limiting plate 310. When the first square tongue 120 stretches out, the limiting piece 310 contacts the first groove wall 122, the elastic force of the limiting torsion spring 311 to the limiting piece 310 enables the limiting piece 310 to keep in the current position and cannot rotate freely, similarly, when the first square tongue 120 retracts, the limiting piece 310 contacts the second groove wall 123, the limiting torsion spring 311 also enables the limiting piece 310 to keep in the current position, the situation that the limiting piece 310 is influenced by gravity and can only vertically downwards along the gravity direction in a normal state is avoided, a user only needs to select two rotation directions when using the twisting square sleeve 300, the operation of the user is simplified, and the use experience of the user is improved.

Referring to fig. 1, 2 and 3, the lock case 100 is slidably connected with a sliding block 131, the sliding block 131 is fixedly connected with a second tongue 130, and the sliding block 131 is used for pushing the second tongue 130 to extend or retract. It can be understood that the second tongue 130 can add the anti-theft function of the anti-theft lock, and also can give more optional experiences to the customer, thereby optimizing the use experience of the customer.

Referring to fig. 4, the slide block 131 is provided with a positioning groove 500, the positioning groove 500 is rotatably connected with a positioning column 243, the transmission member 240 is provided with a straight groove 242, the positioning column 243 abuts against a groove wall of the straight groove 242, and preferably, a side wall of the positioning column 243 is just attached to the groove wall of the straight groove 242. When the second tongue 130 extends out, the positioning post 243 applies a force to the linear groove 242 to drive the transmission member 240 to incline, and further drive the transmission member 240 to separate from the square driving plate 320. It can be understood that, when the user extends and locks the second square bolt 130, the inclined bolt 110 can only retract by rotating the inner square sleeve 210 from the indoor space, and the first square bolt 120 cannot be unlocked simultaneously, so that the anti-theft effect is further ensured, and the use experience of the user is also improved.

Referring to fig. 1, 3 and 4, the slider 131 is provided with a driving groove 132, a movable driving plate 133 is connected in the driving groove 132, the lock case 100 is provided with a positioning groove 500, a limit sloping plate 510 is arranged at the center of the positioning groove 500, and an upper locking groove 520 and an unlocking groove 530 which are matched with the driving plate 133 are formed at two sides of the limit sloping plate 510. Specifically, the two ends of the inclined spacing plate 510 are provided with protrusions, and the distance between the protrusions and the side wall of the positioning groove 500 is just matched with the length of the driving plate 133, that is, the side wall of the driving plate 133 just abuts against the groove walls on the two sides of the upper locking groove 520 or the unlocking groove 530. It can be understood that the driving plate 133 can move to just exceed the protrusions at the two ends of the inclined limiting plate 510, and then move against the top end of the inclined limiting plate 510, so as to realize the switching movement between the upper locking groove 520 and the unlocking groove 530.

The lock shell 100 is rotatably connected with a lock core 400, the lock core 400 is connected with a plectrum 410, it should be noted that when the lock core 400 rotates, the plectrum 410 can abut against the driving plate 133 to push the driving plate 133 to move to the top of the limit sloping plate 510, the plectrum 410 abuts against the groove wall of the driving groove 132 to push the second square bolt 130 to extend or retract, and when the driving plate 133 reaches the position of the upper locking groove 520 or the unlocking groove 530, the plectrum 410 is just separated from the driving plate 133 and the driving groove 132. The user can control the second square bolt 130 through the key to realize locking and unlocking, so that the selection of the user is optimized, and the use experience of the user is improved.

It can be understood that plectrum 410 can also butt the tail end of driving medium 240, and when lock core 400 rotated, plectrum 410 butt driving medium 240 removed, and then drive driver block 241, central spacer 230 removed, and driver block 241 butt spacing piece 310 removed, and central spacer 230 drives interior square sleeve 210 and rotates, and then drives oblique tongue gleitbretter 111 and withdraw, realizes oblique spring bolt 110, first square tongue 120 withdrawal. The user can unlock all lock tongues of the anti-theft lock through the key, so that the unlocking steps of the user can be reduced on the premise of ensuring the anti-theft function, and the use experience of the user is optimized.

Optionally, the latch bolt sliding piece 111 is provided with a guide groove 112, the lock case 100 is fixedly connected with a positioning shaft 113, and the positioning shaft 113 abuts against the groove wall of the guide groove 112 to limit the moving direction of the latch bolt 110, so that the risk of displacement of the latch bolt sliding piece 111 is greatly reduced, the risk of abnormal extension or retraction of the latch bolt 110, the risk of abnormal use, the maintenance and inspection cost of a user is reduced, and the use experience of the user is improved.

Optionally, the dead bolt slide 121 is provided with a dead bolt guide shaft, and the lock case 100 is provided with a dead bolt guide slot, along which the dead bolt guide shaft defines the moving direction of the dead bolt slide 121.

Optionally, lock shell 100 is provided with the spacer, the spacer is connected with release link 250, release link 250 has 2 release tabs, the release tab abuts interior square sleeve 210 respectively, foreign side cover 220, the spacer is connected with square sleeve reset spring 251, the one end of square sleeve reset spring 251 is connected in the release tab, it can be understood that press handle square sleeve 200 when the user, drive outer square sleeve 220 or interior square sleeve 210 when rotating, release link 250 pushes down the spacer and oppresses square sleeve reset spring 251 and takes place elastic deformation, produce elasticity, after the user loosens handle square sleeve 200, square sleeve reset spring 251 promotes handle square sleeve 200 through elasticity and rotates original position, the user need not manually to reset handle square sleeve 200, user's use experience has been promoted.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. An anti-theft lock, comprising:

a lock case;

the inclined lock tongue is connected with an inclined tongue sliding sheet, and the inclined tongue sliding sheet is connected to the lock shell in a sliding mode so as to push the inclined lock tongue to extend out or retract;

the first square tongue is connected with a square tongue sliding sheet, and the square tongue sliding sheet is connected to the lock shell in a sliding mode so as to push the first square tongue to extend out or retract;

the handle square sleeve comprises an inner square sleeve, an outer square sleeve and a central spacer, the inner square sleeve, the outer square sleeve and the central spacer are rotatably connected to the lock shell, the inner square sleeve is fixedly connected with the central spacer, and the inner square sleeve and the outer square sleeve are both provided with oblique bolt shifting pieces so as to drive the oblique bolt to retract;

the square handle sleeve is rotatably connected to the lock shell, the square handle sleeve is connected with a limiting piece, the square tongue sliding piece is provided with a yielding groove, the yielding groove is provided with a first groove wall and a second groove wall, the limiting piece is clamped into the yielding groove, and the limiting piece pushes the square tongue sliding piece to move through the first groove wall so as to push the first square tongue to extend out;

the lock shell is connected with a transmission piece in a sliding mode, the lock shell is connected with a square sleeve driving piece, one end of the transmission piece is connected with the central spacer, the other end of the transmission piece is provided with a driving block, the driving block can be abutted against the square sleeve driving piece, when the inner square sleeve rotates, the transmission piece drives the square sleeve driving piece to rotate, the square sleeve driving piece drives the square sleeve of the wrench to rotate, and the limiting piece pushes the square tongue sliding piece to move through the second groove wall so as to drive the first square tongue to retract.

2. The anti-theft lock according to claim 1, wherein the square sleeve has a circular periphery, the square sleeve driving plate has a circular arc shape, the radius of the square sleeve driving plate is larger than that of the square sleeve, one end of the square sleeve driving plate is rotatably connected to the lock case, and the other end of the square sleeve driving plate abuts against the limiting plate.

3. The anti-theft lock according to claim 1, wherein a limiting torsion spring is connected to the limiting piece and is fixedly connected to the lock case.

4. The anti-theft lock according to claim 1, wherein a sliding block is slidably connected to the lock housing, a second tongue is fixedly connected to the sliding block, and the sliding block is used for pushing the second tongue to extend or retract.

5. The anti-theft lock according to claim 4, wherein said slider is provided with a positioning groove, said positioning groove is rotatably connected with a positioning post, said transmission member is provided with a linear groove, and said positioning post abuts against a groove wall of said linear groove.

6. The anti-theft lock according to claim 4, wherein the sliding block is provided with a driving groove, a movable driving plate is connected in the driving groove, the lock shell is provided with a positioning groove, a limiting inclined plate is arranged in the center of the positioning groove, and locking grooves and unlocking grooves matched with the driving plate are formed on two sides of the limiting inclined plate.

7. The anti-theft lock of claim 6, wherein a lock cylinder is connected to the lock housing, the lock cylinder having a paddle, the paddle being capable of abutting a slot wall of the drive slot and the drive plate.

8. The anti-theft lock according to claim 7, wherein the pick can abut against the transmission member, and when the lock cylinder rotates, the transmission member moves to drive the inclined lock tongue and the first square tongue to retract.

9. The anti-theft lock according to claim 1, wherein the oblique bolt sliding sheet is provided with a guide groove, a positioning shaft is fixedly connected with the lock shell, and the positioning shaft abuts against the groove wall of the guide groove to limit the moving direction of the oblique bolt.

10. The anti-theft lock according to claim 1, wherein the lock case is provided with a positioning plate, a reset rod is connected to the positioning plate, the reset rod is provided with 2 reset plates, the reset plates are respectively abutted against the inner square sleeve and the outer square sleeve, a square sleeve reset spring is connected to the positioning plate, and one end of the square sleeve reset spring is connected to the reset plate.

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