An automatic locking security door bolt

Abstract

This utility model discloses an automatic locking anti-theft door bolt, including a base plate, symmetrically arranged first and second fixed plates, a horizontally movable sliding block, a triangular bolt assembly consisting of a triangular bolt head and a support base, a rotating piece rotatably mounted on the second fixed plate for pushing the sliding block, and a trigger sliding piece with an irregularly shaped limiting groove that can slide up and down; the irregularly shaped limiting groove forms a mechanical limit on the triangular bolt assembly to achieve forced anti-retraction, significantly improving anti-theft security and reliability.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, specifically to an automatic locking anti-theft door bolt. Background Technology

[0002] Currently, most of the automatic locking anti-theft door bolts on the market use a structure of beveled latch and spring. Although they can achieve the basic function of locking when the door is closed, their security is often insufficient. This is mainly reflected in their insufficient anti-disengagement ability when locked. The lock head is easily affected by vibration or external impact (such as prying or impact) and may retract unexpectedly, causing the door lock to fail and making it difficult to guarantee security. Secondly, the internal transmission mechanism often lacks effective guidance and limit design, resulting in unstable component movement, rapid wear, and affecting the stability and service life of the overall structure. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model relates to an automatic locking anti-theft door bolt. This structure is simple and reliable, effectively solving the aforementioned technical problems and is suitable for widespread use. To achieve the above objectives, this utility model is implemented through the following technical solution: An automatic locking security door bolt, including The base plate, and the first fixing plate and the second fixing plate fixed on the left and right sides of the base plate; A sliding block is movably disposed between the first fixed plate and the second fixed plate; A triangular bolt assembly includes a fixedly fitted triangular bolt head and a triangular bolt support, wherein the triangular bolt support is fixedly connected to the sliding block and moves synchronously with it; A rotating plate is rotatably mounted on the second fixed plate and is used to push the sliding block to move laterally when rotated; A trigger slider is slidably disposed between the first fixed plate and the second fixed plate, and is provided with an irregularly shaped limiting groove. The trigger slider has two working positions. In the first position, the irregularly shaped limiting groove allows the triangular bolt head to extend and retract freely. In the second position, the irregularly shaped limiting groove limits the triangular bolt assembly to prevent the triangular bolt head from retracting.

[0004] Based on the above scheme and as a preferred embodiment of the above scheme: the sliding block is L-shaped, with a first protrusion at each end, and a first transverse groove that slides with the first protrusion on the first fixing plate.

[0005] Based on the above scheme and as a preferred embodiment of the above scheme: the triangular bolt support seat is provided with a second protrusion on the side away from the sliding block, and the second fixing plate is provided with a second transverse sliding groove that slides and engages with the second protrusion.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the rotating plate is sleeved on a support shaft fixed to the second fixed plate.

[0007] Based on the above solution and as a preferred embodiment of the above solution: it further includes a spring, one end of which contacts the base plate and the other end of which extends into the limiting hole of the triangular bolt support seat. The spring is used to apply elastic force to the triangular bolt assembly, so that the triangular bolt assembly has the tendency to pop out automatically.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the triangular bolt head, triangular bolt support seat, trigger slider and sliding block are all made of stainless steel.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: support blocks are provided between the first fixing plate and the second fixing plate at the upper and lower ends respectively, and the upper and lower ends of the trigger slider are provided with bent and extended inserts. The inner side of each support block is provided with a positioning groove that matches the corresponding insert. When the trigger slider moves to its first position or second position, the insert can be inserted into the corresponding positioning groove.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the trigger slider is provided with two third protrusions that are symmetrically arranged vertically, and the second fixing plate is provided with vertical grooves that slide and engage with the two third protrusions respectively. The vertical grooves are used to guide the vertical movement of the trigger slider.

[0011] The outstanding and beneficial technical effects of this utility model compared with the prior art are as follows: Through the unique cooperation between the trigger slider and the irregularly shaped limiting groove, mechanical forced locking is achieved in the locked state, making it impossible for the triangular bolt head to be easily pushed back by external force. This fundamentally solves the security risks of traditional door bolts being easily pried open or forced open, and the anti-theft performance is qualitatively improved. The multiple horizontal and vertical sliding grooves provide precise guidance for the moving parts, making the overall operation more stable and smooth. The core transmission and load-bearing components, such as the triangular bolt head, sliding block, and trigger slider, are all made of high-strength materials such as stainless steel, which are wear-resistant and corrosion-resistant. Combined with the optimized mechanical structure, wear is significantly reduced, thereby greatly extending the overall service life of the product. Attached Figure Description

[0012] Figure 1 This is a first-person view of the overall structure of the door bolt; Figure 2 This is a second-view schematic diagram of the overall structure of the door bolt; Figure 3 This is a schematic diagram of the triangular bolt assembly; Figure 4 This is a schematic diagram of the trigger slider. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The directions or positional relationships shown are for the purpose of describing this utility model only, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0016] To solve the above technical problems, such as Figures 1-4 As shown, this utility model designs an automatic locking anti-theft door bolt, including a base plate 1, and a first fixing plate 2 and a second fixing plate 3 fixed on the left and right sides of the base plate 1. The sliding block 4 is movably disposed between the first fixed plate 2 and the second fixed plate 3; The triangular bolt assembly includes a fixedly fitted triangular bolt head 5 and a triangular bolt support 6, wherein the triangular bolt support 6 is fixedly connected to the sliding block 4 and moves synchronously with it; The rotating plate 15 is rotatably mounted on the second fixed plate 3 and is used to push the sliding block 4 to move laterally when rotating, which is efficient and responsive.

[0017] A trigger slider 7 is slidably disposed between the first fixed plate 2 and the second fixed plate 3, and is provided with a shaped limiting groove 8. The trigger slider 7 has two working positions. In the first position, the shaped limiting groove 8 allows the triangular bolt head 5 to extend and retract freely. In the second position, the shaped limiting groove 8 limits the triangular bolt assembly to prevent the triangular bolt head 5 from retracting. Pushing the trigger slider 7 down or up can switch to the corresponding unlocked or locked state. In this embodiment, through the mechanical interlock between the trigger slider 7 and the shaped limiting groove 8, a forced anti-retraction function is achieved, which prevents the triangular bolt head 5 from being pushed back by external force after locking. The anti-theft security is significantly better than that of traditional door bolts. At the same time, the sliding cooperation and positioning structure of each component ensures smooth operation, accurate state switching, and a robust overall structure with a long service life.

[0018] In this embodiment, it is further preferred that the sliding block 4 is L-shaped, with a first protrusion 9 at each end. The first fixing plate 2 is provided with a first transverse groove 10 that slides with the first protrusion 9. By having the protrusions at both ends of the L-shaped sliding block 4 cooperate with the transverse groove on the first fixing plate 2, a precise and stable two-point guide is provided for the transverse movement of the sliding block 4. This structure can effectively prevent the sliding block 4 from deflecting or getting stuck during the movement, and ensure the linearity and smoothness of the movement of the triangular bolt assembly.

[0019] In this embodiment, it is further preferred that the triangular bolt support 6 has a second protrusion 11 on the side away from the sliding block 4, and the second fixing plate 3 has a second transverse groove 12 that slides with the second protrusion 11, providing an additional auxiliary support point for the triangular bolt assembly away from the sliding block 4.

[0020] In this embodiment, it is further preferred that the rotating plate 15 is sleeved on a support shaft 13 fixed to the second fixed plate 3, forming a simple and reliable rotating pair. This structure ensures the smooth and precise rotation of the rotating plate 15 itself. In addition, the rotating plate 15 has a mating surface that contacts the sliding block 4. By optimizing the contact interface between the rotating plate 15 and the sliding block 4, it is ensured that the rotating plate 15 can smoothly and evenly push the sliding block 4 with a large area plane when rotating, rather than point or line contact.

[0021] In this embodiment, it is further preferred to include a spring 14, one end of which contacts the base plate 1, and the other end of which extends into the limiting hole of the triangular bolt support 6. The spring 14 is used to apply elastic force to the triangular bolt assembly, so that the triangular bolt assembly has the tendency to automatically pop out, thus forming an efficient elastic energy storage and release system. This structure provides a continuous and directionally stable driving force for the automatic pop-out of the triangular bolt head 5, and the limiting hole effectively constrains the spring 14 to prevent it from becoming unstable, thus ensuring the decisiveness and reliability of the automatic locking action.

[0022] In this embodiment, it is further preferred that the triangular bolt head 5, triangular bolt support 6, trigger slide 7, and sliding block 4 are all made of stainless steel. The core moving and load-bearing components are all made of stainless steel, which gives the bolt extremely high mechanical strength, excellent wear resistance, and corrosion resistance.

[0023] In this embodiment, it is further preferred that the first fixing plate 2 and the second fixing plate 3 are provided with support blocks 16 located at the upper and lower ends respectively, and the upper and lower ends of the trigger slider 7 are provided with bent and extended inserts 18. The inner side of each support block 16 is provided with a positioning groove 17 that matches the corresponding insert 18. When the trigger slider 7 moves to its first position or second position, the insert 18 can be inserted into the corresponding positioning groove 17, providing a clear positioning sense and mechanical locking for the two working positions of the trigger slider 7, which greatly improves the accuracy of state switching and the stability of the locking state.

[0024] In this embodiment, it is further preferred that the trigger slider 7 is provided with two symmetrical third protrusions 19, and the second fixing plate 3 is provided with vertical grooves 20 that slide and engage with the two third protrusions 19 respectively. The vertical grooves 20 are used to guide the up and down movement of the trigger slider 7, and provide precise vertical guidance for the up and down movement of the trigger slider 7. This structure can effectively prevent the trigger slider 7 from wobbling back and forth or left and right during the movement, and ensure that its irregular limiting groove 8 always maintains the correct engagement relationship with the triangular bolt assembly, thereby ensuring the foolproof anti-reverse function.

[0025] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made by those skilled in the art based on the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automatic locking anti-theft door bolt, characterized in that: include The base plate, and the first fixing plate and the second fixing plate fixed on the left and right sides of the base plate; A sliding block is movably disposed between the first fixed plate and the second fixed plate; A triangular bolt assembly includes a fixedly fitted triangular bolt head and a triangular bolt support, wherein the triangular bolt support is fixedly connected to the sliding block and moves synchronously with it; A rotating plate is rotatably mounted on the second fixed plate and is used to push the sliding block to move laterally when rotated; A trigger slider is slidably disposed between the first fixed plate and the second fixed plate, and is provided with an irregularly shaped limiting groove. The trigger slider has two working positions. In the first position, the irregularly shaped limiting groove allows the triangular bolt head to extend and retract freely. In the second position, the irregularly shaped limiting groove limits the triangular bolt assembly to prevent the triangular bolt head from retracting.

2. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The sliding block is L-shaped, with a first protrusion at each end, and a first transverse groove on the first fixed plate that slides in cooperation with the first protrusion.

3. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The triangular bolt support seat has a second protrusion on the side away from the sliding block, and the second fixing plate has a second transverse groove that slides in cooperation with the second protrusion.

4. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The rotating plate is sleeved on a support shaft fixed to the second fixed plate.

5. The automatic locking anti-theft door bolt according to claim 1, characterized in that: It also includes a spring, one end of which contacts the base plate and the other end of which extends into the limiting hole of the triangular bolt support. The spring is used to apply elastic force to the triangular bolt assembly, so that the triangular bolt assembly has a tendency to pop out automatically.

6. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The triangular bolt head, triangular bolt support, trigger slider, and sliding block are all made of stainless steel.

7. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The first fixing plate and the second fixing plate are provided with support blocks located at the upper and lower ends respectively. The upper and lower ends of the trigger slider are provided with bent and extended inserts. The inner side of each support block is provided with a positioning groove that matches the corresponding insert. When the trigger slider moves to its first position or second position, the insert can be inserted into the corresponding positioning groove.

8. The automatic locking anti-theft door bolt according to claim 1, characterized in that: The trigger slider has two symmetrical third protrusions, and the second fixed plate has vertical grooves that slide and engage with the two third protrusions respectively. The vertical grooves are used to guide the up and down movement of the trigger slider.

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