Stay wire anti-theft device

Abstract

The utility model relates to the technical field of theft prevention, and particularly discloses a stay wire anti-theft device which comprises a lock body, a spring bolt and a stay wire adjusting assembly, the lock body is fixedly arranged on a first anti-theft object, a locking cavity is vertically formed in the lock body, a sliding cavity and an installation cavity are transversely formed in the two sides of the locking cavity in a penetrating mode respectively, and the sliding cavity and the installation cavity are arranged in an up-down staggered mode. The end portions of the two anti-theft objects penetrate through the end face of the locking cavity, a spring bolt is installed in the installation cavity in a matched mode, one end of the spring bolt is fixed to a second anti-theft object locked with the first anti-theft object in a matched mode, and the other end of the spring bolt can penetrate through the installation cavity and extend into the locking cavity; the stay wire adjusting assembly comprises a limiting block, a stay wire, a pushing block and a clamping block, the limiting block is clamped at the opening of the sliding cavity, one end of the stay wire penetrates through the limiting block and then extends out to be connected with the pushing block, and the other end of the stay wire is connected with the driving mechanism. According to the anti-theft device, the first anti-theft object and the second anti-theft object can be mutually locked or detached, and locking or unlocking of the device is achieved by controlling the pull wire through the driving mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of anti-theft technology, specifically a pull-cord anti-theft device. Background Technology

[0002] Anti-theft devices are typically used on electric vehicles, motorcycles, battery boxes, and automotive parts to prevent theft of batteries, vehicles, and vehicle components. However, some anti-theft devices currently use electronic control components to lock them. However, when locking, the anti-theft device may fail to manually separate the bolt from the lock body due to a malfunction in the electronic control component. Therefore, there is an urgent need to design a pull-cord anti-theft device to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a pull-cord anti-theft device that solves the problem that existing anti-theft devices mentioned above often fail to manually separate the bolt from the lock body when locked due to malfunctions in the electronic control part.

[0004] To solve the above-mentioned technical problems, this utility model provides a pull cord anti-theft device, including a lock body, a lock tongue, and a pull cord adjustment assembly. The lock body is fixedly mounted on the anti-theft object one. A locking cavity is vertically arranged inside the lock body. A sliding cavity and a mounting cavity are horizontally arranged on both sides of the locking cavity. The sliding cavity and the mounting cavity are staggered vertically, and their ends both penetrate the end face of the locking cavity. A lock tongue is installed in the mounting cavity. One end of the lock tongue is fixed to the anti-theft object two that needs to be locked with the anti-theft object one, and the other end can pass through the mounting cavity and extend into the locking cavity.

[0005] The pull-wire adjustment assembly includes a limiting block, a pull wire, a pushing block, and a locking block. The limiting block is locked at the opening of the sliding cavity. One end of the pull wire passes through the limiting block and extends out to connect with the pushing block, while the other end is connected to the drive mechanism. The drive mechanism is controlled by either manual or automatic control.

[0006] The engaging block is disposed within the locking cavity, and a spring is provided between the engaging block and the inner top surface of the locking cavity. One end of the pushing block is disposed within the sliding cavity, and the other end passes through the engaging block and extends out to connect with one end of the pull line. The outer wall of the pushing block engages with the inner wall of the engaging block and the cavity wall of the sliding cavity through a wedge-shaped structure. The pull line pulls the pushing block to compress the engaging block, and the engaging block moves upward within the locking cavity under the compressive force, thereby releasing the locking section of the latch.

[0007] Furthermore, the wedge-shaped structure includes a first inclined surface, a second inclined surface, and a third inclined surface. The first inclined surface is disposed at the junction of the upper part of the sliding cavity and the locking cavity. The pushing block has a large and small end structure. The second inclined surface is disposed at the junction of the upper part of the large end and the small end of the pushing block and is configured to cooperate with the first inclined surface. The third inclined surface is disposed on the inner top wall of the locking block and cooperates with the second inclined surface.

[0008] Furthermore, the height of the small end of the pushing block is less than the height of the inner cavity of the engaging block, and the height of the large end of the pushing block is greater than the height of the inner cavity of the engaging block, but less than the distance from the bottom surface of the inner cavity of the engaging block to the top of the third inclined surface.

[0009] Furthermore, the bottom surface of the mounting cavity is provided with a trapezoidal groove that mates with the end of the locking section of the latch.

[0010] Furthermore, a locking groove is provided on the outer wall of the locking tongue, a first conical surface is provided on the inner wall of the locking groove, the lower part of the locking block cooperates with the locking groove, and a fourth inclined surface that fits against the first conical surface is provided on one side of the lower part of the locking block, and an arc-shaped groove that cooperates with the locking groove is provided at the bottom of the locking block.

[0011] Furthermore, the lock body is composed of a fixing plate, a mounting sleeve, and a cover plate. The inner end of the limiting block is provided with a second conical surface, and a slot is provided on its outer wall. A stepped groove is provided on the cover plate, which penetrates one side surface of the cover plate. The step of the stepped groove cooperates with the slot.

[0012] Furthermore, the two ends of the pull wire are respectively provided with a first connecting block and a second connecting block. The first connecting block is locked in the end of the push block near the limiting block, and the second connecting block is connected to the drive mechanism.

[0013] Furthermore, the drive mechanism is controlled either manually or automatically.

[0014] Furthermore, the lock body is provided with a number of fixing holes.

[0015] The beneficial effects of this utility model are as follows: The pull cord anti-theft device of this utility model can lock or detach the anti-theft item 1 and the anti-theft item 2 from each other. The locking or unlocking of the device can be achieved by controlling the pull cord through the drive mechanism. The drive mechanism can be electrically controlled or manually controlled. Therefore, the device can be unlocked manually or automatically, which solves the problem of the device being locked due to the failure of the electrical control part and thus cannot be detached from the anti-theft item. This improves the security and anti-theft level between the anti-theft item 1 and the anti-theft item 2.

[0016] The wedge-shaped structure of this application allows the pull wire to convert the lateral force into a vertical force when pulling the push block. This is achieved through the tension of the pull wire and the cooperation between the second inclined surface on the push block and the third inclined surface on the inner top wall of the locking block. When the locking block is subjected to the vertical force, it moves upward, and the spring at the top of the locking block is also compressed due to the vertical force. When the inner bottom surface of the locking block is in contact with the bottom of the push block, the squeezing stops, and at the same time, the lower part of the locking block moves away from the locking tongue, thereby unlocking the locking tongue and enabling it to meet the requirements of both automatic and manual control modes.

[0017] The height settings of the large and small ends of the push block allow the push block to pass smoothly through the locking block. At the same time, the movement distance of the push block can be effectively controlled by matching the inner cavity size of the locking block and the second inclined surface size of the push block. This can effectively prevent the large end of the push block from getting stuck in the inner cavity of the locking block and being unable to move left or right.

[0018] The trapezoidal groove effectively fixes the locking section of the bolt, thus preventing bolt misalignment.

[0019] The locking block design allows the fourth inclined surface at the bottom of the locking block to effectively contact the first conical surface of the locking tongue groove, enabling the arc groove at the bottom of the locking block to effectively engage with the locking tongue groove, thereby effectively improving the locking fit between the locking block and the locking tongue. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall structural diagram of a pull-cord anti-theft device according to this utility model;

[0022] Figure 2 This is a cross-sectional view of the released locking tongue section of a pull-cord anti-theft device according to this utility model;

[0023] Figure 3 This is a cross-sectional view of the lock body of a pull-cord anti-theft device according to this utility model;

[0024] Figure 4 This is a structural diagram of a pull-cord anti-theft device of this utility model after the fixing plate has been removed;

[0025] Figure 5 The present invention relates to a structural diagram of the pull cord of a pull cord anti-theft device;

[0026] Figure 6 This is a top view of the push block of a pull-cord anti-theft device according to this utility model;

[0027] Figure 7 This is a diagram showing the fit between the push block and the locking block of a pull-cord anti-theft device according to this utility model;

[0028] Figure 8 This is a structural diagram of the limiting block of a pull-cord anti-theft device according to this utility model;

[0029] Figure 9 This is a structural diagram of the cover plate of a pull-cord anti-theft device according to this utility model.

[0030] In the diagram: 1-lock body, 2-lock tongue, 3-pull cable adjustment assembly, 12-locking cavity, 13-fixed plate, 14-mounting sleeve, 15-cover plate, 16-fixing hole, 21-locking groove, 31-limiting block, 32-pull cable, 33-push block, 34-locking block, 35-spring, 111-sliding cavity, 112-mounting cavity, 114-first inclined surface, 115-second inclined surface, 151-step groove, 211-first conical surface, 311-slot, 312-second conical surface, 321-first connecting block, 322-second connecting block, 341-third inclined surface, 342-fourth inclined surface, 343-arc groove, 1121-trapezoidal groove. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In one specific embodiment of this utility model, such as Figures 1-9 As shown, a pull cord anti-theft device is disclosed, including a lock body 1, a lock tongue 2 and a pull cord adjustment assembly 3. The lock body 1 is fixedly installed on the anti-theft object 1. A locking cavity 12 is vertically arranged inside the lock body 1. A sliding cavity 111 and a mounting cavity 112 are horizontally arranged on both sides of the locking cavity 12. The sliding cavity 111 and the mounting cavity 112 are staggered vertically, and their ends both penetrate the end face of the locking cavity 12. The lock tongue 2 is installed in the mounting cavity 112. One end of the lock tongue 2 is fixed to the anti-theft object 2 that needs to be locked with the anti-theft object 1, and the other end can pass through the mounting cavity 112 and extend into the locking cavity 12.

[0033] The pull-wire adjustment assembly 3 includes a limiting block 31, a pull wire 32, a pushing block 33, and a locking block 34. The limiting block 31 is locked at the opening of the sliding cavity 111. One end of the pull wire 32 passes through the limiting block 31 and extends out to connect with the pushing block 33, while the other end is connected to the drive mechanism.

[0034] In this embodiment, the two ends of the pull wire 32 are respectively provided with a first connecting block 321 and a second connecting block 322. The first connecting block 321 is locked in the end of the push block 33 near the limit block 31, and the second connecting block 322 is connected to the drive mechanism.

[0035] The locking block 34 is disposed in the locking cavity 12, and a spring 35 is provided between the locking block 34 and the inner top surface of the locking cavity 12. One end of the pushing block 33 is disposed in the sliding cavity 111, and the other end passes through the locking block 34 and extends out to connect with one end of the pull line 32. The outer wall of the pushing block 33 is engaged with the inner wall of the locking block 34 and the cavity wall of the sliding cavity 111 through a wedge structure. The pull line 32 pulls the pushing block 33 to squeeze the locking block 34. Under the squeezing force, the locking block 34 moves upward in the locking cavity 12, causing it to release the locking section of the locking tongue 2.

[0036] The pull cord anti-theft device can lock or detach two anti-theft items. The locking or unlocking of the device can be achieved simply by controlling the pull cord through a drive mechanism. This drive mechanism can be electrically controlled or manually controlled, so the device can be unlocked manually or automatically. This solves the problem of the device being locked due to a malfunction in the electrical control part, making it impossible to detach the anti-theft item, thereby improving the security and anti-theft level between the two anti-theft items.

[0037] The wedge structure includes a first inclined surface 114, a second inclined surface 115, and a third inclined surface 341. The first inclined surface 114 is located at the junction of the upper part of the sliding cavity 111 and the locking cavity 12. The pushing block 33 has a large and small end structure. The second inclined surface 115 is located at the upper junction of the large end and the small end of the pushing block 33 and is configured to cooperate with the first inclined surface 114. The third inclined surface 341 is located on the inner top wall of the locking block 34 and cooperates with the second inclined surface 115.

[0038] The wedge structure allows the pull wire 32 to pull the push block 33, and through the tension of the pull wire 32 and the cooperation between the second inclined surface 115 on the push block 33 and the third inclined surface 341 on the inner top wall of the locking block 34, the lateral force is converted into a vertical force. When the locking block 34 is subjected to the vertical force, it moves upward, and the spring 35 on the upper part of the locking block 34 is also compressed due to the vertical force. When the inner bottom surface of the locking block 34 is in contact with the bottom of the push block 33, the squeezing stops, and at the same time, the lower part of the locking block 34 moves away from the locking tongue 2, thereby unlocking the locking tongue 2 and enabling it to meet the requirements of both automatic and manual control modes.

[0039] The height of the small end of the pushing block 33 is less than the height of the inner cavity of the locking block 34, and the height of the large end of the pushing block 33 is greater than the height of the inner cavity of the locking block 34, but less than the distance from the bottom surface of the inner cavity of the locking block 34 to the top of the third inclined surface 341.

[0040] The height settings of the large and small ends of the push block 33 allow the push block 33 to pass smoothly through the locking block 34. At the same time, the movement distance of the push block 33 can be effectively controlled by matching the inner cavity size of the locking block 34 with the dimensions of the second inclined surface 115 and the third inclined surface 341 of the push block 33. This can effectively prevent the large end of the push block 33 from getting stuck in the inner cavity of the locking block 34 and being unable to move left or right.

[0041] The bottom surface of the mounting cavity 112 is provided with a trapezoidal groove 1121 that mates with the end of the locking section of the latch 2. The trapezoidal groove 1121 can effectively fix the locking section of the latch 2 to avoid the problem of the latch 2 shifting.

[0042] The outer wall of the locking tongue 2 is provided with a locking groove 21, and the inner wall of the locking groove 21 is provided with a first conical surface 211. The lower part of the locking block 34 engages with the locking groove 21, and one side of its lower part is provided with a fourth inclined surface 342 that fits against the first conical surface 211. The bottom of the locking block 34 is provided with an arc-shaped groove 343 that engages with the locking groove 21.

[0043] The aforementioned locking block 34 allows the fourth inclined surface 342 at the bottom of the locking block 34 to effectively contact the first conical surface 211 of the locking groove 21 of the locking tongue 2, enabling the arc groove 343 at the bottom of the locking block 34 to effectively engage with the locking groove 21 of the locking tongue 2, thereby effectively improving the locking fit between the locking block 34 and the locking tongue 2.

[0044] The lock body 1 is composed of a fixing plate 13, a mounting sleeve 14 and a cover plate 15. The inner end of the limiting block 31 is provided with a second conical surface 312, and a slot 311 is provided on its outer wall. The cover plate 15 is provided with a stepped groove 151, which penetrates one side surface of the cover plate 15. The step of the stepped groove 151 cooperates with the slot 311. The setting of the slot 311 on the limiting block 31 and the stepped groove 151 on the cover plate 15 can limit and lock the slot 311 on the limiting block 31 through the step of the stepped groove 151, so as to avoid the problem that the limiting block 31 will deviate when the pull cable 32 is pulled, which will cause the pull cable 32 to deviate.

[0045] The working process of this utility model:

[0046] After the lock body 1 is secured to the first anti-theft object by passing several bolts through the fixing holes 16 on the lock body 1, the outer end of the lock tongue 2 is fixed to the second anti-theft object that needs to be locked in conjunction with the first anti-theft object. The drive mechanism pulls the pull cable 32 to move away from the lock tongue 2. Under the pulling force of the pull cable 32, the push block 33 moves towards the limiting block 31 in the locking block 34. At the same time, the second inclined surface 115 on the push block 33 presses against the third inclined surface 341 on the inner top wall of the locking block 34 and is blocked by the side wall of the locking cavity 12. Therefore, the force of the push block 33 moving laterally is converted into a vertical force after being blocked. The contact of the push block 33 changes from the lower part of the second inclined surface 115 to the upper large end of the second inclined surface 115. At this time, the spring 35 is compressed upward under the pressure of the inclined surface of the large end of the push block 33. Therefore, the locking block 34 also moves upward as a whole. When it moves to the second inclined surface 115 on the push block 33 and the sliding cavity 111 and the lock When the first inclined surface 114 at the upper part of the engagement cavity 12 is engaged, the movement stops. At this time, the arc-shaped groove 343 at the lower part of the engaging block 34 coincides with the inner hole of the mounting cavity 112, allowing the bolt 2 to be inserted into the lock body 1. After insertion, the tension of the pull cable 32 is released, and the spring 35 moves downward under the extension force, pushing the engaging block 34 downward. This pushes the pushing block 33 to move away from the limiting block 31. The contact of the pushing block 33 is achieved by the second inclined surface 115. The upper contact becomes the lower contact, thus pushing the large end of the block 33 away from the locking block 34, so that the small end contacts the inner wall of the locking block 34. Then the locking block 34 moves downward as a whole, so that the arc groove 343 at the bottom is engaged in the locking groove 21 of the locking tongue 2. The groove wall of the locking groove 21 of the locking tongue 2 and the side wall of the locking block 34 form a limit. At the same time, the fourth inclined surface 342 of the locking block 34 fits against the first conical surface 211 of the locking groove 21 to lock the locking tongue 2.

[0047] If it is necessary to unlock the latch 2, move the locking block 34 upward according to the above steps to unlock the latch 2.

[0048] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A theft deterrent device for a drawstring, comprising: The lock body (1), the latch (2), and the pull cord adjustment assembly (3) are included. The lock body (1) is fixedly installed on the first anti-theft object. A locking cavity (12) is vertically arranged inside the lock body (1). A sliding cavity (111) and a mounting cavity (112) are horizontally arranged on both sides of the locking cavity (12). The sliding cavity (111) and the mounting cavity (112) are staggered vertically, and their ends both penetrate the end face of the locking cavity (12). A latch (2) is installed in the mounting cavity (112). One end of the latch (2) is fixed to the second anti-theft object that needs to be locked with the first anti-theft object, and the other end can pass through the mounting cavity (112) and extend into the locking cavity (12). The pull wire adjustment assembly (3) includes a limiting block (31), a pull wire (32), a pushing block (33), and a locking block (34). The limiting block (31) is locked at the opening of the sliding cavity (111). One end of the pull wire (32) passes through the limiting block (31) and extends out to connect with the pushing block (33), while the other end is connected to the drive mechanism. The locking block (34) is disposed in the locking cavity (12), and a spring (35) is provided between the locking block (34) and the inner top surface of the locking cavity (12). One end of the pushing block (33) is disposed in the sliding cavity (111), and the other end passes through the locking block (34) and extends out to connect with one end of the pull line (32). The outer wall of the pushing block (33) is engaged with the inner wall of the locking block (34) and the cavity wall of the sliding cavity (111) through a wedge structure. The pull line (32) pulls the pushing block (33) to squeeze the locking block (34). Under the squeezing force, the locking block (34) moves upward in the locking cavity (12) to release the locking section of the locking tongue (2).

2. The stay alert device of claim 1, wherein, The wedge-shaped structure includes a first inclined surface (114), a second inclined surface (115), and a third inclined surface (341). The first inclined surface (114) is located at the junction of the upper part of the sliding cavity (111) and the locking cavity (12). The pushing block (33) has a large and small end structure. The second inclined surface (115) is located at the junction of the upper part of the large end and the small end of the pushing block (33) and is configured to cooperate with the first inclined surface (114). The third inclined surface (341) is located on the inner top wall of the locking block (34) and cooperates with the second inclined surface (115).

3. A stay alerting device according to claim 2, wherein The height of the small end of the push block (33) is less than the height of the inner cavity of the locking block (34), and the height of the large end of the push block (33) is greater than the height of the inner cavity of the locking block (34), but less than the distance from the bottom surface of the inner cavity of the locking block (34) to the top of the third inclined surface (341).

4. The stay line anti-theft device according to claim 1, wherein The bottom surface of the mounting cavity (112) is provided with a trapezoidal groove (1121) that mates with the end of the locking section of the latch (2).

5. The stay line anti-theft device according to claim 1, wherein The outer wall of the locking tongue (2) is provided with a locking groove (21), the inner wall of the locking groove (21) is provided with a first conical surface (211), the lower part of the locking block (34) cooperates with the locking groove (21), and one side of its lower part is provided with a fourth inclined surface (342) that fits against the first conical surface (211). The bottom of the locking block (34) is provided with an arc groove (343) that cooperates with the locking groove (21).

6. The stay line anti-theft device according to claim 1, wherein The lock body (1) is composed of a fixing plate (13), a mounting sleeve (14) and a cover plate (15). The inner end of the limiting block (31) is provided with a second conical surface (312) and a slot (311) is provided on its outer wall. The cover plate (15) is provided with a stepped groove (151) which penetrates one side surface of the cover plate (15). The step of the stepped groove (151) cooperates with the slot (311).

7. The stay line anti-theft device according to claim 1, wherein The two ends of the pull wire (32) are respectively provided with a first connecting block (321) and a second connecting block (322). The first connecting block (321) is locked in the end of the push block (33) near the limit block (31), and the second connecting block (322) is connected to the drive mechanism.

8. The stay alert device of claim 1, wherein, The drive mechanism can be controlled either manually or automatically.

9. The stay line anti-theft device according to claim 1, wherein The lock body (1) has several fixing holes (16) distributed on it.

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