Anti-theft lock for center shaft of bicycle

Abstract

The utility model relates to the technical field of bicycle theft prevention, in particular to a bicycle center shaft anti-theft lock which comprises a device shell and a driving assembly, two sets of sliding blocks are oppositely arranged in the device shell, bolts are arranged on the sliding blocks, first racks are arranged on the sliding blocks, and the output end of the driving assembly extends into the device shell and is provided with a transmission gear. The first racks are meshed with the transmission gear in a toothed mode, the two first racks are matched with the two opposite sides of the transmission gear respectively, a positioning plate is slidably arranged in the device shell, a first telescopic assembly is arranged between the positioning plate and the device shell, and a positioning protruding block matched with the positioning plate in an inserted mode is arranged on the sliding block. The positioning plate is arranged in the device shell, after the bolt moves, the positioning plate moves downwards to enable the positioning protruding block arranged on the sliding block to be matched with the hole in the positioning plate in an inserted mode, the sliding block is positioned and fixed through clamping matching, and the probability that the bolt is knocked by external force to retract and move into the device shell from the through opening is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle anti-theft, in particular to an anti-theft lock for a bicycle center shaft. Background Art

[0002] A Chinese patent with the announcement number CN221340871U discloses a bicycle central axis anti-theft lock, which belongs to the field of bicycle anti-theft technology. A bicycle central axis anti-theft lock includes: a device housing, specifically, the device housing includes a connecting box body and a through-port, and the through-port is provided with two through-ports, which are respectively provided at the two ends of the outer wall of the connecting box body; a driving mechanism, which is arranged on the device body, specifically, the driving mechanism includes a motor, a rotating rod and a gear, the motor is fixed at the center of the top of the connecting box body, one end of the rotating rod is fixed at the output end of the motor, and the other end thereof passes through the top of the connecting box body, and the gear is fixed at the bottom of the rotating rod; a limiting mechanism, which is arranged on the device housing, and is used to assist in limiting. The utility model solves the problem that most of the bicycle lock is exposed to the outside, which is easy to be pried open or cut by thieves, which brings unnecessary worries and losses to people who use bicycles. In this patent, the motor drives the plug to extend from the through-port of the connecting box body and insert into the inner wall of the lock core to achieve locking of the bicycle. However, in this patent, the bolt is fixed in position only by the meshing of the rack and the gear, which makes the bolt easily retracted from the opening into the device housing by being knocked by external force, so that the bolt and the lock core opening are separated from each other.

[0003] Based on this, the utility model designs a bicycle middle shaft anti-theft lock to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a bicycle middle shaft anti-theft lock to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bicycle central axis anti-theft lock, comprising a device shell and a drive assembly, two groups of sliders are oppositely arranged in the device shell, the two groups of sliders are centrally symmetrically arranged, a latch is arranged on the slider, a through hole for the latch to pass through is arranged on the side wall of the device shell, a first rack is arranged on the slider, the drive assembly is arranged on the outer wall of the device shell, the output end of the drive assembly extends into the device shell and is provided with a transmission gear, the first rack and the transmission gear are meshed with each other, two groups of the first racks are respectively matched with the opposite sides of the transmission gear, a positioning plate is slidably arranged in the device shell, a first telescopic assembly is arranged between the positioning plate and the device shell, and a positioning protrusion is provided on the slider that is plugged and matched with the positioning plate.

[0006] Preferably, a bottom plate is provided in the device housing, the bottom plate is provided at the lower side of the slider, and the slider and the bottom plate are slidably abutted against each other.

[0007] Preferably, two sets of side plates are oppositely arranged on the bottom plate, and the two sets of side plates are respectively slidably matched with the two sets of side walls of the sliding block.

[0008] Preferably, two groups of top plates are oppositely arranged on the bottom plate, and the two groups of top plates are respectively abutted and matched with the tops of the two groups of sliding blocks.

[0009] Preferably, the slider is arranged in an L shape, and the latch is arranged on the short side of the slider.

[0010] Preferably, the short side of the slider and the bottom of the long side of the adjacent slider abut against each other and match each other.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention arranges a positioning plate in the device housing, and when the latch is moved, the positioning plate moves downward so that the positioning protrusions arranged on the slider are plugged and matched with the holes on the positioning plate, and the slider is positioned and fixed by means of snap-fit ​​matching, thereby reducing the probability of the latch being retracted from the through opening into the device housing by being knocked by external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the utility model embodiments, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the slider of the utility model;

[0015] Figure 3 It is a schematic diagram of the internal structure of the housing of the device of the utility model.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1-device housing, 11-through hole, 2-driving assembly, 21-transmission gear, 3-slider, 31-latch pin, 32-first rack, 4-positioning plate, 41-first telescopic assembly, 42-positioning protrusion, 43-slot, 5-bottom plate, 51-side plate, 52-top plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Combination Figure 1-3 :

[0020] A bicycle central axis anti-theft lock comprises a device housing 1 and a driving assembly 2. Two groups of sliders 3 are oppositely arranged in the device housing 1. The two groups of sliders 3 are centrally symmetrically arranged. A latch 31 is arranged on the slider 3. A through hole 11 for the latch 31 to pass through is arranged on the side wall of the device housing 1. A first rack 32 is arranged on the slider 3. The driving assembly 2 is arranged on the outer wall of the device housing 1. The output end of the driving assembly 2 extends into the device housing 1 and is provided with a transmission gear 21. The first rack 32 and the transmission gear 21 are meshed with each other. The two groups of first racks 32 are respectively matched with the opposite sides of the transmission gear 21. A positioning plate 4 is slidably arranged in the device housing 1. A first telescopic assembly 41 is arranged between the positioning plate 4 and the device housing 1. A positioning protrusion 42 that is plugged and matched with the positioning plate 4 is provided on the slider 3.

[0021] Furthermore, a bottom plate 5 is provided in the device housing 1 , and the bottom plate 5 is provided at the lower side of the slider 3 , and the slider 3 and the bottom plate 5 are slidably abutted against each other.

[0022] Furthermore, two sets of side plates 51 are oppositely disposed on the bottom plate 5 , and the two sets of side plates 51 are slidably matched with the side walls of the two sets of sliders 3 respectively.

[0023] Furthermore, two groups of top plates 52 are oppositely disposed on the bottom plate 5 , and the two groups of top plates 52 are respectively abutted and matched with the tops of the two groups of sliders 3 .

[0024] Furthermore, the slider 3 is arranged in an L shape, and the latch 31 is arranged on the short side of the slider 3 .

[0025] Furthermore, the short sides of the slider 3 and the bottoms of the long sides of the adjacent sliders 3 abut and match each other.

[0026] Specific application examples of the utility model:

[0027] The driving assembly 2 can be made of a driving motor. The output end of the driving assembly 2 penetrates the device housing 1 and extends into the device housing 1. The transmission gear 21 and the first rack 32 are meshed with each other to drive the slider 3 to move. The two groups of first racks 32 arranged on the two groups of sliders 3 are respectively meshed with the opposite sides of the transmission gear 21, so that when the transmission gear 21 rotates, the two groups of sliders 3 can be driven to move in opposite directions at the same time. The latch 31 is arranged on the slider 3. When the slider 3 moves, the latch 31 is driven to move and insert into the inner wall of the lock core opening to lock the car. The first telescopic assembly 41 can be made of an electric telescopic rod. The first telescopic assembly 41 extends to drive the positioning plate 4 to move toward the slider 3. When the slider 3 moves to the position driven by the driving assembly 2, the positioning plate 4 moves down and abuts against the top wall of the slider 3, so that the positioning protrusion 42 arranged on the top wall of the slider 3 and the slot opened on the positioning plate 4 are mutually engaged and matched, and the horizontal movement of the slider 3 is restricted, thereby achieving the purpose of positioning and fixing the slider 3. The positioning plate 4 is provided with two groups of slots, which are respectively plugged and matched with the positioning protrusions 42 at different positions when the latch 31 extends out of the device housing 1 and retracts into the device housing 1. This is conducive to positioning and fixing the slider 3 in the two groups of states. The slider 3 is L-shaped, and the short arm of the slider 3 abuts against the end of the long arm of the adjacent slider 3 away from the short arm. When the short arm of the slider 3 abuts against the long arm of the adjacent slider 3, it means that the latch 31 is completely retracted into the device housing 1. This is conducive to preliminary positioning of the slider 3. The lower side of the slider 3 is provided with a bottom plate 5 that abuts against and matches the bottom wall of the slider 3. The bottom plate 5 abuts against and matches the lower side wall of the slider 3, which is conducive to preventing the positioning plate 4 from moving downward and pushing the slider 3 to follow the positioning plate 4 downward, so that the first rack 32 and the transmission gear 21 are separated from each other. The side plates 51 are arranged on the long sides of the bottom plate 5 on both sides. The side plates 51 abut against and match the side walls of the slider 3 to limit the movement of the slider 3 in the direction away from the transmission gear 21. This is conducive to ensuring that the first rack 32 matches the transmission gear 21. Two sets of top plates 52 are oppositely arranged on the short sides of the bottom plate 5. The two sets of top plates 52 are respectively abutted and matched with the end walls of the two sets of sliders 3 to limit the moving distance of the slider 3, thereby limiting the length of the latch 31 extending out of the device housing 1. This is conducive to the mutual matching of the slot on the side of the positioning plate 4 away from the transmission gear 21 and the positioning protrusion 42 on the slider 3.

[0028] In the description of the utility model, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In the utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0030] Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bicycle axle anti-theft lock, comprising a device housing (1) and a drive assembly (2), characterized in that: Two groups of sliders (3) are oppositely arranged in the device housing (1), and the two groups of sliders (3) are centrally symmetrically arranged. A latch pin (31) is arranged on the slider (3), and a through hole (11) for the latch pin (31) to pass through is arranged on the side wall of the device housing (1). A first rack (32) is arranged on the slider (3). The drive assembly (2) is arranged on the outer wall of the device housing (1), and the output end of the drive assembly (2) extends into the device housing (1) and is provided with a transmission gear (21). The first rack (32) and the transmission gear (21) are meshed with each other, and the two groups of the first racks (32) are respectively matched with the opposite sides of the transmission gear (21). A positioning plate (4) is slidably arranged in the device housing (1), and a first telescopic assembly (41) is arranged between the positioning plate (4) and the device housing (1). A positioning protrusion (42) is provided on the slider (3) and is plugged and matched with the positioning plate (4).

2. The bicycle middle axle anti-theft lock according to claim 1, characterized in that: A bottom plate (5) is provided in the device housing (1), the bottom plate (5) being provided on the lower side of the slider (3), and the slider (3) and the bottom plate (5) are in sliding contact with each other.

3. The bicycle middle axle anti-theft lock according to claim 2, characterized in that: Two sets of side plates (51) are arranged opposite to each other on the bottom plate (5), and the two sets of side plates (51) are respectively slidably matched with the two sets of side walls of the sliding blocks (3).

4. The bicycle middle axle anti-theft lock according to claim 2, characterized in that: Two groups of top plates (52) are arranged opposite to each other on the bottom plate (5), and the two groups of top plates (52) are respectively abutted and matched with the tops of the two groups of sliding blocks (3).

5. The bicycle middle axle anti-theft lock according to claim 1, characterized in that: The slider (3) is arranged in an L-shape, and the latch (31) is arranged on the short side of the slider (3).

6. The bicycle middle axle anti-theft lock according to claim 5, characterized in that: The short side of the slider (3) and the bottom of the long side of the adjacent slider (3) are mutually abutted and matched.

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