Anti-theft locks

Abstract

The present invention relates to the technical field of locks, and provides an anti-theft lock comprising: a housing with a slide groove, a handle pivotally connected to the housing through a pivot, a rotating member arranged on the pivot and having a concave cavity formed by being recessed in the radial direction of the pivot, and a sliding member slidably arranged in the slide groove and used for being inserted into / slid out of the concave cavity; the housing is provided with a strip hole parallel to the slide groove, and the sliding member is provided with a toggle portion penetrating the strip hole. When the user needs to lock the handle, the user only needs to toggle the sliding member through the toggle portion so that the sliding member is stuck in the concave cavity to prevent the rotating member from rotating, thereby preventing the pivot on the handle from rotating; when the user needs to unlock the handle, the user only needs to toggle the sliding member through the toggle portion so that the sliding member slides out of the concave cavity to unlock the rotating member from rotating, thereby unlocking the pivot on the handle from rotating; safety is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of locks, and more specifically, relates to an anti-theft lock. Background Art

[0002] In modern buildings, anti-theft doors are widely used. For easy observation, anti-theft doors are usually equipped with peepholes. However, it is easy to move the door handle inside the door by passing a tool through the peephole. Once the door handle is moved, the door can be easily opened, which seriously affects the safety of users. Summary of the invention

[0003] The object of the present invention is to provide an anti-theft lock to solve the technical problem in the prior art that the door handle can be easily moved to open the door.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an anti-theft lock including: a shell with a slide groove, a handle pivotally connected to the shell through a pivot, a rotating part arranged on the pivot and having a concave cavity formed by being recessed in the radial direction of the pivot, and a sliding part slidably arranged in the slide groove and used for getting in / out of the concave cavity; the shell is provided with a strip hole parallel to the slide groove, and the sliding part is provided with a toggle part penetrating into the strip hole.

[0005] Furthermore, the cavity comprises a first recessed portion and a second recessed portion which are connected to each other, and the sliding member comprises a first protruding portion for being inserted into the first recessed portion and a second protruding portion for being inserted into the second recessed portion.

[0006] Further, the first protrusion is in a bent shape, and / or the second protrusion is in a bent shape.

[0007] Furthermore, the inner wall of the first recessed portion and the inner wall of the second recessed portion are connected to form a W shape.

[0008] Further, the first recessed portion, the second recessed portion, the first raised portion, and the second raised portion are respectively multiple; the multiple first recessed portions, the multiple second recessed portions, the multiple first raised portions, and the multiple second raised portions correspond to each other one by one.

[0009] Furthermore, an elastic body is connected between the sliding member and the housing and is used to drive the sliding member to approach the rotating member.

[0010] Furthermore, a positioning piece is provided on the shell, and an edge of the sliding piece has a positioning notch, and when the first protrusion is clamped in the first recessed portion, the positioning piece is clamped in the positioning notch.

[0011] Furthermore, the positioning notch is located between the first protruding portion and the second protruding portion.

[0012] Furthermore, the pivot is provided with a slot extending along the extending direction of the pivot, and the rotating member is provided with a boss engaged in the slot.

[0013] Furthermore, the sliding member is provided with a guide hole parallel to the sliding groove, and the housing is provided with a guide member inserted into the guide hole.

[0014] The beneficial effects of the anti-theft lock provided by the present invention are as follows: compared with the prior art, with the anti-theft lock provided by the present invention, the user drives the pivot to rotate through the handle, a rotating part is provided on the pivot, and the rotation of the pivot drives the rotating part to rotate; a concave cavity is provided on the rotating part, and the concave cavity is recessed in the radial direction of the pivot; a slide groove is provided on the shell, and the sliding part is slidably arranged in the slide groove; when the user needs to lock the handle, he only needs to slide the sliding part through the toggle part so that the sliding part is stuck in the concave cavity to prevent the rotating part from rotating, thereby preventing the pivot on the handle from rotating; when the user needs to unlock the handle, he only needs to slide the sliding part through the toggle part so that the sliding part slides out of the concave cavity to unlock the rotation of the rotating part, thereby unlocking the rotation of the pivot on the handle; safety is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the installation of a toggle unit provided in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the installation of a sliding member provided in an embodiment of the present invention;

[0018] Figure 3 A three-dimensional schematic diagram of a sliding member provided in an embodiment of the present invention;

[0019] Figure 4 A three-dimensional schematic diagram of a reversible lock provided by an embodiment of the present invention;

[0020] Figure 5 A three-dimensional assembly diagram of a sleeve portion provided in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a three-dimensional assembly of a sleeve portion and a pivot provided in an embodiment of the present invention;

[0022] Figure 7 A three-dimensional assembly diagram of a sleeve portion and a return spring provided in an embodiment of the present invention;

[0023] Figure 8 A three-dimensional schematic diagram of a return spring provided by an embodiment of the present invention being located in a first position;

[0024] Fig. 9 A three-dimensional schematic diagram of a rotating member provided in an embodiment of the present invention;

[0025] Fig.10 A three-dimensional schematic diagram of a return spring provided in an embodiment of the present invention;

[0026] Fig.11 A three-dimensional schematic diagram of a reset spring provided by an embodiment of the present invention being located in a second position;

[0027] Fig.12 A schematic diagram of the principle of a return spring provided by an embodiment of the present invention being located in a first position;

[0028] Fig.13 A schematic diagram of the principle of the return spring provided in an embodiment of the present invention being located in the second position.

[0029] Among them, the reference numerals in the figure are:

[0030] 1-shell; 11-sleeve; 12-first stopper; 13-second stopper; 14-slide; 15-strip hole; 21-handle; 22-pivot; 221-slot; 23-rotating member; 231-first pushing portion; 232-second pushing portion; 233-boss; 241-concave cavity; 2411-first recessed portion; 2412-second recessed portion; 25-nut; 3-reset spring; 31-first end; 32-second end; 4-sliding member; 41-toggle portion; 42-first raised portion; 43-second raised portion; 44-positioning notch; 45-positioning member; 46-guide hole; 47-guide member; 5-elastic body. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Please also read Figures 1 to 5 The anti-theft lock provided by the present invention is now described. The anti-theft lock comprises: a housing 1 having a slide groove 14, a handle 21 pivotally connected to the housing 1 through a pivot 22, a rotating member 23 disposed on the pivot 22 and having a recessed cavity 241 formed in the radial direction of the pivot 22, and a sliding member 4 slidably disposed in the slide groove 14 and used for being inserted into / slid out of the recessed cavity 241; a strip hole 15 parallel to the slide groove 14 is disposed on the housing 1, and a toggle portion 41 penetrating the strip hole 15 is disposed on the sliding member 4.

[0036] In this way, the user drives the pivot 22 to rotate through the handle 21, and a rotating member 23 is provided on the pivot 22, and the rotation of the pivot 22 drives the rotating member 23 to rotate; a concave cavity 241 is provided on the rotating member 23, and the concave cavity 241 is recessed in the radial direction of the pivot 22 (in one embodiment, the concave cavity 241 is recessed in the radial direction of the pivot 22 and close to the axis); a slide groove 14 is provided on the shell 1, and the sliding member 4 is slidably arranged in the slide groove 14; when the user needs to lock the handle 21, it is only necessary to slide the sliding member 4 through the toggle part 41 so that the sliding member 4 is stuck in the concave cavity 241 to prevent the rotating member 23 from rotating, thereby preventing the pivot 22 on the handle 21 from rotating; when the user needs to unlock the handle 21, it is only necessary to slide the sliding member 4 through the toggle part 41 so that the sliding member 4 slides out of the concave cavity 241 to unlock the rotation of the rotating member 23, thereby unlocking the rotation of the pivot 22 on the handle 21, thereby ensuring safety.

[0037] In one embodiment, the toggle portion 41 is in the shape of a rod. In one embodiment, the width of the strip-shaped hole 15 is the same as the diameter of the toggle portion 41 .

[0038] For further information, see Figures 1 to 5As a specific embodiment of the anti-theft lock provided by the present invention, the cavity 241 includes a first recessed portion 2411 and a second recessed portion 2412 that are connected, and the sliding member 4 has a first protrusion 42 for inserting into the first recessed portion 2411 and a second protrusion 43 for inserting into the second recessed portion 2412. In this way, the first protrusion 42 is clamped in the first recessed portion 2411, and the second protrusion 43 is clamped in the second recessed portion 2412. The first protrusion 42 and the second protrusion 43 are together provided with a brake that can lift the rotating member 23 under action.

[0039] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, the first protrusion 42 is bent, and / or the second protrusion 43 is bent. In this way, the bent first protrusion 42 can enhance the strength of the first protrusion 42, and the bent second protrusion 43 can enhance the strength of the second protrusion 43.

[0040] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, the inner wall of the first recessed portion 2411 and the inner wall of the second recessed portion 2412 are connected to form a W shape. In this way, it is easy to process, and the W-shaped structure can improve the anti-deformation ability.

[0041] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, the first recessed portion 2411, the second recessed portion 2412, the first protruding portion 42, and the second protruding portion 43 are multiple; the multiple first recessed portions 2411, the multiple second recessed portions 2412, the multiple first protruding portions 42, and the multiple second protruding portions 43 correspond to each other. In this way, the multiple first recessed portions 2411, the multiple second recessed portions 2412, the multiple first protruding portions 42, and the multiple second protruding portions 43 cooperate with each other to position the rotating member 23 at different rotation angles.

[0042] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, an elastic body 5 is connected between the sliding member 4 and the housing 1 for driving the sliding member 4 to approach the rotating member 23. In this way, the elastic body 5 can drive the sliding member 4 to approach the rotating member 23 and get stuck in the concave cavity 241 to brake the rotating member 23.

[0043] Specifically, in one embodiment, the elastic body 5 is a torsion spring. Specifically, in one embodiment, the elastic body 5 is a butterfly-type torsion spring.

[0044] For further information, see Figures 1 to 5As a specific embodiment of the anti-theft lock provided by the present invention, a positioning member 45 is provided on the housing 1, and a positioning notch 44 is provided on the edge of the sliding member 4. When the first protrusion 42 is clamped in the first recess 2411, the positioning member 45 is clamped in the positioning notch 44. In this way, when the first protrusion 42 is clamped in the first recess 2411, the positioning member 45 on the housing 1 is clamped in the positioning notch 44 on the sliding member 4, thereby reducing the shaking of the sliding member 4.

[0045] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, the positioning notch 44 is located between the first protrusion 42 and the second protrusion 43. In this way, the first protrusion 42 and the second protrusion 43 on the first protrusion 42 and the second protrusion 43 can protect the positioning notch 44 located between the first protrusion 42 and the second protrusion 43; and the positioning notch 44 can transfer the force to the first protrusion 42 and the second protrusion 43 when subjected to external force.

[0046] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, the pivot 22 is provided with a slot 221 extending along the extension direction of the pivot 22, and the rotating member 23 is provided with a boss 233 locked in the slot 221. In this way, the boss 233 on the rotating member 23 can prevent the rotating member 23 from rotating relative to the pivot 22 after being locked in the slot 221.

[0047] For further information, see Figures 1 to 5 As a specific embodiment of the anti-theft lock provided by the present invention, a guide hole 46 parallel to the slide groove 14 is provided on the sliding member 4, and a guide member 47 inserted in the guide hole 46 is provided on the housing 1. In this way, during the sliding process of the sliding member 4, the guide member 47 inserted in the guide hole 46 can play a guiding role; and the guide member 47 can reduce the vibration / shaking of the sliding member 4 during the sliding process.

[0048] Please also read Figures 1 to 10 In one embodiment, the anti-theft lock further includes: a housing 1, a handle 21 pivotally connected to the housing 1 through a pivot 22, a rotating member 23 disposed on the pivot 22, a first pushing portion 231 disposed on the rotating member 23 and capable of rotating around the pivot 22 with the rotating member 23, and an elastic member; the housing 1 has a first position and a second position for placing the elastic member respectively, and the first position and the second position are respectively located on the moving path of the first pushing portion 231.

[0049] In this way, the handle 21 drives the pivot 22 to rotate, the pivot 22 drives the rotating member 23 to rotate, and the rotating member 23 drives the first pushing portion 231 to rotate around the pivot 22; when the elastic member is in the first position, the first pushing portion 231 contacts the elastic member at the first position (assuming that the handle 21 is in the first working position at this time), the user rotates the handle 21 to deform the elastic member at the first position, and if the user releases the handle 21, the first pushing portion 231 pushes the handle 21 to return to its original position during the recovery of the elastic member; when the elastic member is moved from the first position to the second position, the first pushing portion 231 contacts the elastic member at the second position (assuming that the handle 21 is in the second working position at this time), the user rotates the handle 21 to deform the elastic member at the second position, and if the user releases the handle 21, the first pushing portion 231 pushes the handle 21 to return to its original position during the recovery of the elastic member; that is, by adjusting the elastic member in the first position and the second position, the handle 21 can be used in the first working position or the second working position, and the adjustment is very convenient.

[0050] In one embodiment, the housing 1 is a metal shell or a plastic shell.

[0051] In one embodiment, the rotating member 23 is a metal plate.

[0052] In one embodiment, when the handle 21 is in the first working position or the second working position, the handle 21 rotates relative to the housing 1 at different angles.

[0053] For further information, see Figures 1 to 10 In one embodiment, the elastic member is a cylindrical return spring 3; the housing 1 has a sleeve portion 11 sleeved on the pivot 22; the return spring 3 is sleeved on the sleeve portion 11; the return spring 3 can be switched between the first position and the second position around the sleeve portion 11; the two ends of the return spring 3 are respectively a first end 31 and a second end 32; the housing 1 on opposite sides of the sleeve portion 11 is respectively provided with a first stopper 12 and a second stopper 13; the second stopper 13 is detachably fixed to the housing 1; the first end 31 is located on the rotation path of the first pushing portion 231; wherein, when the return spring 3 rotates to the first position, the first end 31 of the return spring 3 abuts against the first end 31 of the first pushing portion 231; On a stopper 12, the second end 32 of the return spring 3 abuts against the second stopper 13; in the rotation direction of the return spring 3, the first stopper 12, the second stopper 13, and the first pushing portion 231 are respectively located in the same interval between the first end 31 and the second end 32; when the return spring 3 rotates to the second position, the first end 31 of the return spring 3 abuts against the second stopper 13, and the second end 32 of the return spring 3 abuts against the first stopper 12; in the rotation direction of the return spring 3, the first stopper 12, the second stopper 13, and the first pushing portion 231 are respectively located in the same interval between the first end 31 and the second end 32.

[0054] In this way, (1) the handle 21 is pivotally connected to the housing 1 via the pivot 22, the sleeve portion 11 on the housing 1 is sleeved on the outside of the pivot 22, the return spring 3 is sleeved on the sleeve portion 11, and the return spring 3 can rotate around the sleeve portion 11, the sleeve portion 11 separates the pivot 22 and the return spring 3, and avoids mutual interference between the return spring 3 and the pivot 22; (2) the return spring 3 can switch between the first position and the second position around the sleeve portion 11; when the handle 21 rotates, it drives the pivot 22 to rotate, the rotation of the pivot 22 drives the rotating member 23 to rotate, and the rotation of the rotating member 23 drives the first pushing portion 231 located on the rotating member 23 to rotate around the pivot 22; because the first end 31 is located on the rotation path of the first pushing portion 231, the first pushing portion 231 rotates around the pivot 22 2 can contact the first end 31 of the return spring 3 and push the return spring 3 to rotate around the pivot 22; (3) when the return spring 3 is in the first position (assuming that the handle 21 is rotated to the first working position at this time), the first end 31 of the return spring 3 abuts against the first stopper 12, and the second end 32 of the return spring 3 abuts against the second stopper 13, and the state of the return spring 3 can remain stable; (4) The process of rotating and resetting the handle 21 in the first working position is as follows: when the user rotates the handle 21, the first pushing portion 231 rotates around the pivot 22 and pushes the first end 31 to approach the second end 32, and the potential energy of the return spring 3 increases; when the user releases the handle 21, the first end 31 of the return spring 3 pushes the handle 21 to return to its original position through the first pushing portion 231 Position (when the first end 31 abuts against the first stopper 12, the handle 21 stops rotating) (5) When the user removes the second stopper 13, the user drives the first pushing portion 231 to rotate around the pivot 22 through the handle 21 and pushes the return spring 3 to rotate through the first end 31. The second end 32 originally abutting against the second stopper 13 can pass over the installation position of the second stopper 13 and rotate toward the first stopper 12 until the return spring 3 rotates to the second position (assuming that the handle 21 rotates to the second working position at this time), and then the second stopper 13 is installed. The first end 31 of the return spring 3 abuts against the second stopper 13, and the second end 32 of the return spring 3 abuts against the first stopper 12. The state of the return spring 3 can remain stable; (6) Position The process of rotating and resetting the handle 21 in the second working position is as follows: at this time, if the user rotates the handle 21, so that the first pushing portion 231 rotates around the pivot 22 and pushes the first end 31 toward the second end 32, the potential energy of the reset spring 3 increases; the user loosens the handle 21, and the first end 31 of the reset spring 3 pushes the handle 21 to reset through the first pushing portion 231 (when the first end 31 abuts against the second stopper 13, the handle 21 stops rotating); (7) That is, the handle 21 can be rotated and reset when it is in the first working position, and by removing the second stopper 13 and rotating the handle 21 from the first working position to the second working position, and then installing the second stopper 13, the function of the handle 21 being able to rotate and reset when it is in the second working position can be realized;The user can set the handle 21 to the first working position or the second working position according to actual conditions. ;

[0055] Specifically, in one embodiment, the first pushing portion 231 is a protruding portion disposed on the rotating member 23 .

[0056] Specifically, in one embodiment, the second pushing portion 232 is a protruding portion disposed on the rotating member 23 .

[0057] For further information, see Figures 1 to 10 In one embodiment, when the first pusher 231 pushes the return spring 3 to rotate from the first position to the second position, the pivot 22 rotates ninety to one hundred and eighty degrees. Thus, when the position of the handle 21 is switched from the first working position to the second working position, the state of the handle 21 can be rotated ninety to one hundred and eighty degrees.

[0058] Specifically, in one embodiment, when the first pushing portion 231 pushes the return spring 3 to rotate from the first position to the second position, the pivot 22 rotates one hundred and eighty degrees.

[0059] For further information, see Figures 1 to 10 In one embodiment, the return spring 3 is a torsion spring. Thus, the structure is simple. The first end 31 and the second end 32 of the torsion spring can store / release elastic potential energy when they rotate relative to each other around the pivot 22.

[0060] For further information, see Figures 1 to 10 In one embodiment, the pivot 22 is provided with a slot 221 extending along the extension direction of the pivot 22, and the rotating member 23 is provided with a boss 233 locked in the slot 221; a nut 25 is sleeved on the pivot 22, and the rotating member 23 is clamped between the nut 25 and the sleeve portion 11. In this way, the boss 233 on the rotating member 23 can prevent the rotating member 23 from rotating relative to the pivot 22 after being locked in the slot 221; the nut 25 can prevent the rotating member 23 from detaching from the pivot 22.

[0061] For further information, see Figures 1 to 10 In one embodiment, the distance between the first push portion 231 and the axis of the pivot 22 is smaller than the distance between the first stopper 12 and the axis of the pivot 22, and the distance between the first push portion 231 and the axis of the pivot 22 is smaller than the distance between the second stopper 13 and the axis of the pivot 22. In this way, the first push portion 231 is prevented from hitting the first stopper 12 when rotating around the pivot 22, and the first push portion 231 is prevented from hitting the second stopper 13 when rotating around the pivot 22.

[0062] For further information, see Figures 1 to 10In one embodiment, the first stopper 12 is a screw threadedly connected to the housing 1, and / or the second stopper 13 is a screw threadedly connected to the housing 1. In this way, it is very convenient to disassemble the first stopper 12 and the second stopper 13.

[0063] For further information, see Figures 1 to 10 In one embodiment, the rotating member 23 further has a second pushing portion 232, and the second end 32 is located on the rotation path of the second pushing portion 232; when the return spring 3 rotates to the first position, in the rotation direction of the return spring 3, the first stop member 12, the second stop member 13, and the second pushing portion 232 are respectively located in the same interval between the first end 31 and the second end 32; when the return spring 3 rotates to the second position, in the rotation direction of the return spring 3, the first stop member 12, the second stop member 13, and the second pushing portion 232 are respectively located in the same interval between the first end 31 and the second end 32. The first end 31 of the reset spring 3 abuts against the first stop 12, and the second end 32 of the reset spring 3 abuts against the second stop 13, so that the reset spring 3 remains in the first position.

[0064] For further information, see Figures 1 to 10 In one embodiment, the distance between the second pushing portion 232 and the axis of the pivot 22 is smaller than the distance between the first stopper 12 and the axis of the pivot 22, and the distance between the second pushing portion 232 and the axis of the pivot 22 is smaller than the distance between the second stopper 13 and the axis of the pivot 22. In this way, the second pushing portion 232 is prevented from hitting the first stopper 12 when rotating around the pivot 22, and the second pushing portion 232 is prevented from hitting the second stopper 13 when rotating around the pivot 22.

[0065] For further information, see Figures 1 to 10In one embodiment, when the return spring 3 is located at the first position, the first push portion 231 abuts against the first end 31, and the second push portion 232 abuts against the second end 32. In this way, both the first push portion 231 and the second push portion 232 are in contact with the return spring 3, so that the first push portion 231 drives the return spring 3 to rotate, or the second push portion 232 drives the return spring 3 to rotate.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Anti-theft lock, characterized in that: include: The cam is an elastic member which is provided with a first end and a second end thereof, and the first end is provided with a second elastic member which is provided with a first end and a second elastic member which is provided with a second elastic member. A first stopper and a second stopper are respectively provided on the shell at opposite sides of the cylinder; the second stopper is detachably fixed to the shell; the first end is located on the rotation path of the first pushing portion; wherein, when the return spring rotates to the first position, the first end of the return spring abuts against the first stopper, and the second end of the return spring abuts against the second stopper; in the rotation direction of the return spring, the first stopper, the second stopper, and the first pushing portion are respectively located in the same interval between the first end and the second end; when the return spring rotates to the second position, the first end of the return spring abuts against the second stopper, and the second end of the return spring abuts against the first stopper; in the rotation direction of the return spring, the first stopper, the second stopper, and the first pushing portion are respectively located in the same interval between the first end and the second end; The concave cavity includes a first recessed portion and a second recessed portion that are connected, and the sliding part has a first protruding portion for being inserted into the first recessed portion and a second protruding portion for being inserted into the second recessed portion; the first protruding portion is bent, and / or the second protruding portion is bent; the inner wall of the first recessed portion and the inner wall of the second recessed portion are connected to form a W shape.

2. The anti-theft lock according to claim 1, characterized in that: There are a plurality of the first recessed portion, the second recessed portion, the first protruding portion, and the second protruding portion; the plurality of the first recessed portions, the plurality of the second recessed portions, the plurality of the first protruding portions, and the plurality of the second protruding portions correspond to each other one by one.

3. The anti-theft lock according to claim 1, characterized in that: An elastic body is connected between the sliding member and the housing and is used to drive the sliding member to approach the rotating member.

4. The anti-theft lock according to claim 1, characterized in that: A positioning piece is disposed on the housing, and a positioning notch is provided at an edge of the sliding piece. When the first protrusion is clamped in the first recess, the positioning piece is clamped in the positioning notch.

5. The anti-theft lock according to claim 4, characterized in that: The positioning notch is located between the first protrusion and the second protrusion.

6. The anti-theft lock according to claim 1, characterized in that: The pivot is provided with a slot extending along the extending direction of the pivot, and the rotating member is provided with a boss locked in the slot.

7. The anti-theft lock according to claim 1, characterized in that: The sliding member is provided with a guide hole parallel to the sliding groove, and the housing is provided with a guide member inserted into the guide hole.

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