Convenient bottom opening combination lock

Abstract

The utility model provides a kind of convenient bottom opening coded lock, including sealed lock body, the lower portion of the sealed lock body is equipped with the coded lock mechanism, the lower end of the sealed lock body is connected with lock root installation, the lock root and lock head are all set up telescopic groove, the both ends of the lock bolt are slidably installed in the telescopic groove, and are connected with spring, wherein the lock bolt is set up with limit sliding slot, the telescopic groove of the lock root and lock head is equipped with several limit teeth, lock head clamping groove is set up on the lock head;The utility model is reduced in size by telescopic structure, solves inconvenience to carry;Limit tooth and spring cooperate to prevent loosening and jam, improve stability;Spring reset design accelerates response, manual adjustment is free, and high-frequency scene is adapted.

Description

Technical Field

[0001] This utility model belongs to the field of combination lock technology, and in particular relates to a convenient bottom-opening combination lock. Background Technology

[0002] Bottom-opening combination locks are convenient security products that unlock via a combination mechanism operated from the bottom. They are widely used in suitcases, drawers, storage boxes, and wardrobes. Their bottom opening design reduces the frequency of bending over, improving daily usability. Some existing bottom-opening combination locks employ a longer U-shaped shank structure to accommodate objects of varying thicknesses (such as double-layered suitcase zippers and thick door panel gaps), increasing the shank span to meet diverse locking needs. However, traditional long shank designs have significant drawbacks: the shank is often a fixed length structure, making it difficult to effectively reduce the overall volume when stored, thus occupying storage space in backpacks and suitcases and severely impacting portability. While some products attempt to shorten the shank length, excessive reduction limits its adaptability, while maintaining a long shank makes it difficult to balance practicality and portability, becoming a common technical pain point in the industry.

[0003] Therefore, it is essential to invent a convenient bottom-opening combination lock. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a convenient bottom-opening combination lock, including a sealed lock body, a combination locking mechanism, a lock root, a lock head, a telescopic groove, a lock tongue, a limiting slide groove, limiting teeth, a spring, and a lock head slot. The combination locking mechanism is installed below the sealed lock body. The sealed lock body is connected to the lower end of the lock root. Both the lock root and the lock head have telescopic grooves. The two ends of the lock tongue are slidably installed in the telescopic grooves and connected to the spring. The lock tongue has a limiting slide groove. Several limiting teeth are provided in the telescopic grooves of the lock root and the lock head. The lock head has a lock head slot.

[0005] Preferably, the lock root, lock head, and lock tongue together form the lock beam structure of the combination lock, and the three of them form an inverted "U" shape. The two ends of the lock tongue can slide and extend within the telescopic grooves of the lock root and lock head, respectively.

[0006] Preferably, the inner wall of the telescopic groove of the lock root and the lock head has a plurality of limiting teeth arranged axially, the cross section of the limiting teeth is a triangular protruding tooth structure, and the limiting teeth are adapted to the limiting groove of the lock tongue.

[0007] Preferably, the limiting groove of the latch is slidably engaged with the limiting tooth, the latch as a whole is an inverted "U" shaped structure, and the outer surface of both vertical ends of the latch is provided with limiting grooves corresponding to the limiting tooth.

[0008] Preferably, the end of the locking tongue that slides into the telescopic groove is connected to the upper end of the spring, and the lower end of the spring is connected to the bottom of the telescopic groove.

[0009] Compared with the prior art, the present invention has the following beneficial effects: This utility model uses a telescopic structure design for the lock root, lock head, and lock tongue, which allows the lock beam to be extended to the required length when in use and to be folded away by retracting the lock tongue into the telescopic groove, thereby reducing the overall volume by more than 30%. This solves the problem of the inconvenience of carrying traditional long lock beam combination locks and is especially suitable for high-frequency mobile scenarios such as travel and outdoor activities.

[0010] The triangular limiting teeth in the telescopic groove of this utility model form a precise fit with the locking tongue limiting slide groove. Combined with the elastic support of the spring, it can prevent loosening or jamming during the telescopic process, avoid subsequent relative displacement, and improve stability.

[0011] The elastic reset design of the spring in this invention significantly improves the dynamic response performance of the lock beam extension and retraction, ensuring that the lock head quickly resets to the locked position after unlocking, avoiding manual adjustment steps, and is especially suitable for high-frequency use scenarios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the lock beam structure of this utility model.

[0014] Figure 3 This is a utility model Figure 2 A schematic diagram of a partial pavement structure.

[0015] In the picture: 1. Sealed lock body; 2. Password locking mechanism; 3. Lock root; 4. Lock head; 5. Telescopic groove; 6. Lock tongue; 7. Limiting slide groove; 8. Limiting tooth; 9. Spring; 10. Lock head slot. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0017] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0018] As attached Figure 1 To be continued Figure 3 As shown: This utility model provides a convenient bottom-opening combination lock, including a sealed lock body 1, a combination locking mechanism 2, a lock root 3, a lock head 4, a telescopic groove 5, a lock tongue 6, a limiting slide groove 7, limiting teeth 8, a spring 9, and a lock head slot 10. The combination locking mechanism 2 is installed below the sealed lock body 1. The sealed lock body 1 is connected to the lower end of the lock root 3. Both the lock root 3 and the lock head 4 are provided with telescopic grooves 5. The two ends of the lock tongue 6 are slidably installed in the telescopic grooves 5 and connected to the spring 9. The lock tongue 6 is provided with a limiting slide groove 7. Several limiting teeth 8 are provided in the telescopic grooves 5 of the lock root 3 and the lock head 4. The lock head 4 is provided with a lock head slot 10.

[0019] Furthermore, the lock root 3, lock cylinder 4, and lock tongue 6 together constitute the lock beam structure of the combination lock. After assembly, the three form an inverted "U" shape to adapt to the edge contour of the locked object. Among them, the lock root 3 is made of 304 stainless steel and is integrally stamped. Its lower end is telescopically and rotatably installed on the inner wall of the sealed lock body 1 to adapt to different locking angles. The lock cylinder 4 is made of the same 304 stainless steel as the lock root 3, and its free end is provided with a lock cylinder groove 10. The lock tongue 6 is precision machined from high-strength aluminum alloy. Its two ends are respectively inserted into the telescopic grooves 5 of the lock root 3 and the lock cylinder 4, and maintain a sliding gap of 0.05-0.1mm with the inner wall of the telescopic groove 5. Through the gap fit, it achieves smooth telescopic extension and contraction along the axial direction of the telescopic groove 5, thereby adjusting the overall span of the lock beam to adapt to locked objects of different thicknesses.

[0020] Furthermore, the inner walls of the telescopic grooves 5 of both the lock root 3 and the lock head 4 are arranged in a circular array with several limiting teeth 8. The limiting teeth 8 are integrally formed with the lock root 3 and the lock head 4, and their cross-section is an isosceles triangular protruding tooth structure, which are evenly spaced along the axial direction of the telescopic groove 5. The limiting teeth 8 and the limiting slide grooves 7 of the lock tongue 6 form a concave-convex fit. When the lock tongue 6 slides along the telescopic groove 5, the limiting teeth 8 can be embedded in the grooves of the limiting slide grooves 7, which restricts the free sliding of the lock tongue 6 through mechanical engagement, preventing the lock beam from rotating and shifting due to vibration or external impact in the locked state, thus improving structural stability.

[0021] Furthermore, the limiting groove 7 of the latch 6 and the limiting teeth 8 of the lock root 3 and lock head 4 form a precision sliding fit structure. The limiting groove 7 is a strip-shaped groove (with an isosceles triangle cross-section, complementary to the protruding structure of the limiting teeth 8) opened on the outer surface of the vertical ends of the latch 6, forming a clearance fit with the limiting teeth 8, which ensures both smooth sliding and tight engagement. The latch 6 as a whole has an inverted "U" shaped structure, and its vertical outer surfaces are anodized (thickness 5-8μm) to improve wear resistance and ensure that it is not easily worn or deformed after long-term sliding contact with the limiting teeth 8.

[0022] Furthermore, the end of the locking tongue 6 that slides into the telescopic groove 5 (i.e., the end of the vertical section) is fixedly connected to the upper end of the spring 9 by welding. The spring 9 is made of 65Mn spring steel with a diameter of 0.8mm, and its lower end is detachably connected to the bottom of the telescopic groove 5 (the preset spring fixing groove) through a hook structure. When the locking tongue 6 is compressed by external force, the spring 9 is compressed and stores elastic potential energy; when the external force is removed (i.e., in the unlocked state), the spring 9 releases elastic potential energy, driving the locking tongue 6 to slide outward and reset along the telescopic groove 5, realizing the automatic expansion of the lock beam length. At the same time, the continuous elastic force of the spring can ensure that the limiting tooth 8 and the limiting slide groove 7 always maintain a tight engagement, preventing the locking tongue 6 from loosening.

[0023] The working principle is as follows: First, when you need to store this combination lock in a portable way, simply compress the latch 6 and the spring 9 to store it in a small space. Due to the space limitation, the size of the space can be maintained. At this time, the latch 6 retracts into the telescopic groove 5 of the lock root 3 and the lock head 4. The cooperation between the limiting tooth 8 and the limiting slide groove 7 can help maintain the compressed storage state and prevent the latch from accidentally popping out, which would cause the storage volume to increase. This makes it convenient to put it into a backpack, pocket or other small area for carrying.

[0024] When the combination lock is needed, it is taken out of the storage space to release the space restriction on the bolt 6. The spring 9 releases its elastic potential energy to drive the bolt 6 to slide outward and reset along the telescopic groove 5, so that the inverted "U"-shaped lock beam composed of the lock root 3, lock head 4 and bolt 6 unfolds. The limiting tooth 8 and the limiting slide groove 7 are tightly engaged to ensure the stability of the lock beam. Then, by operating the combination locking mechanism 2 at the bottom, the lock head slot 10 of the lock head 4 is engaged with the corresponding locking structure to complete the locking action.

[0025] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A convenient bottom-opening combination lock, characterized in that, The lock includes a sealed lock body (1), a combination lock mechanism (2), a lock root (3), a lock head (4), a telescopic groove (5), a lock tongue (6), a limiting slide groove (7), a limiting tooth (8), a spring (9), and a lock head slot (10). The combination lock mechanism (2) is installed below the sealed lock body (1). The sealed lock body (1) is connected to the lower end of the lock root (3). The lock root (3) and the lock head (4) are both provided with telescopic grooves (5). The two ends of the lock tongue (6) are slidably installed in the telescopic grooves (5) and connected to the spring (9). The lock tongue (6) is provided with a limiting slide groove (7). The telescopic grooves (5) of the lock root (3) and the lock head (4) are provided with several limiting teeth (8). The lock head (4) is provided with a lock head slot (10).

2. The convenient bottom-opening combination lock as described in claim 1, characterized in that: The lock root (3), lock head (4) and lock tongue (6) together form the lock beam structure of the combination lock. The three of them form an inverted "U" shape. The two ends of the lock tongue (6) can slide in the telescopic grooves (5) of the lock root (3) and lock head (4).

3. A convenient bottom-opening combination lock as described in claim 2, characterized in that: The inner wall of the telescopic groove (5) of the lock root (3) and the lock head (4) has a plurality of limiting teeth (8) arranged axially. The cross section of the limiting teeth (8) is a triangular protruding tooth structure. The limiting teeth (8) are adapted to the limiting slide groove (7) of the lock tongue (6).

4. A convenient bottom-opening combination lock as described in claim 3, characterized in that: The limiting groove (7) of the latch (6) is slidably engaged with the limiting tooth (8). The latch (6) is an inverted "U" shaped structure. The outer surfaces of the vertical ends of the latch (6) are provided with limiting grooves (7) corresponding to the limiting tooth (8).

5. A convenient bottom-opening combination lock as described in claim 4, characterized in that: The end of the locking tongue (6) that slides into the telescopic groove (5) is connected to the upper end of the spring (9), and the lower end of the spring (9) is connected to the bottom of the telescopic groove (5).

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