A long service life cabinet electronic lock

Abstract

The utility model relates to the field of cabinet electronic lock, especially to a cabinet electronic lock with long service life, the lock shell is rotationally provided with a lock hook and a stop lever, the lock hook is provided with an abutting surface, the stop lever is provided with a stop surface corresponding to the abutting surface, and the contact area between the abutting surface and the stop surface is greater than 70%. In the utility model, the contact area between the abutting surface and the stop surface is increased to more than 70%, which can reduce the contact stress and friction wear, prevent abnormal sound and functional failure after long-term use, ensure uniform stress of the torsional spring through the setting of the sub-torsional spring groove and the female torsional spring groove with interference fit on the lock hook, improve the torsional spring fixing reliability and fatigue life, limit the wire diameter and effective winding number of the torsional spring, further improve the service life of the torsional spring, and greatly improve the service life of the electronic lock as a whole.

Description

Technical Field

[0001] This utility model relates to the field of electronic lock technology for cabinets and boxes, and in particular to an electronic lock for cabinets and boxes with a long service life. Background Technology

[0002] Electronic locks are commonly used in vending machines, display cases, storage cabinets, lockers, express delivery lockers, and other lockers to secure them.

[0003] During the daily opening and closing of the door, there is continuous mechanical impact and minor friction between the lock hook and the abutment lever. Over time, the surface of the abutment part will wear and scratch. The direct consequences are abnormal noises and a deteriorated feel when locking; in more serious cases, the lock hook may fail to reliably engage the abutment lever, leading to locking failure, automatic handle release, and other functional malfunctions. Furthermore, the torsion spring inside the lock body will also have its lifespan reduced due to uneven stress distribution over long-term use. Therefore, there is an urgent need for a long-lasting electronic lock for cabinets. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a long-life electronic lock for cabinets.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A long-life electronic lock for cabinets includes a lock housing. A lock hook and a stop lever are rotatably disposed within the lock housing. The lock hook has an abutment surface, and the stop lever has a stop surface corresponding to the abutment surface. The contact area between the abutment surface and the stop surface is greater than 70%. Both sides of the lock hook have sub-torsion spring grooves with an interference fit of 0.02-0.03 mm. One side of the lock hook has a female torsion spring groove with an interference fit of 0.05-0.08 mm.

[0006] Furthermore, in a preferred configuration, the lock housing has an internal mounting cavity, in which a male fixing post and a female fixing post are fixedly mounted, and the lock hook and the abutting lever are rotatably mounted on the male fixing post and the female fixing post via the male mounting shaft and the female mounting shaft, respectively.

[0007] In addition, a preferred structure is that a torsion spring is sleeved on the sub-fixing post, and a sub-torsion spring groove and a female torsion spring groove are opened on the locking hook to match the torsion spring.

[0008] Furthermore, in a preferred configuration, the opening of the female torsion spring groove is provided with a 30° guide slope, and the interference difference between the male and female torsion spring grooves is less than 0.05 mm.

[0009] In addition, a preferred structure is that a lock opening is provided on one side of the lock housing, and a locking opening adapted to the lock opening is provided on the lock hook.

[0010] Furthermore, in a preferred configuration, a torsion spring is wound around the sub-fixing post, the torsion spring having a wire diameter of 0.8 mm and an effective number of turns of 5.

[0011] The beneficial effects of this utility model are as follows: by increasing the contact area of ​​the abutting surface and the top surface to more than 70%, the contact stress and friction wear can be reduced, thus preventing abnormal noise and functional failures after long-term use. By setting the male and female torsion spring grooves with interference fit on the lock hook, the force on the torsion spring is ensured to be uniform, improving the fixing reliability and fatigue life of the torsion spring. Furthermore, by limiting the wire diameter and effective number of winding turns of the torsion spring, the service life of the torsion spring can be further improved, thereby significantly improving the overall service life of the electronic lock. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a long-service-life electronic lock for cabinets proposed in this utility model; Figure 2 for Figure 1 A schematic diagram of the internal structure of the lock case; Figure 3 This is a schematic diagram of the structure between the locking hook and the abutting lever proposed in this utility model; Figure 4 for Figure 3 A schematic diagram of the planar structure in the diagram; Figure 5 for Figure 4 A schematic diagram of the structure during unlocking; Figure 6 This is a schematic diagram of the structure of the locking hook proposed in this utility model; Figure 7 This is a schematic diagram of the counterweight lever proposed in this utility model.

[0013] In the diagram: 1 lock housing, 11 mounting cavity, 12 lock port, 13 male fixing post, 14 female fixing post, 2 lock hook, 21 male mounting shaft, 22 locking port, 23 male torsion spring groove, 24 female torsion spring groove, 25 abutting surface, 3 abutting lever, 31 female mounting shaft, 32 abutting surface. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-7A long-life electronic lock for cabinets includes a lock housing 1. A lock hook 2 and a stop lever 3 are rotatably disposed within the lock housing 1. The lock hook 2 has an abutment surface 25, and the stop lever 3 has a stop surface 32 corresponding to the abutment surface 25. The contact area between the abutment surface 25 and the stop surface 32 is greater than 70%. Both sides of the lock hook 2 have sub-torsion spring grooves 23 with an interference fit of 0.02-0.03 mm. One side of the lock hook 2 has a female torsion spring groove 24 with an interference fit of 0.05-0.08 mm.

[0016] The lock housing 1 has an internal mounting cavity 11, within which a male fixing post 13 and a female fixing post 14 are fixedly mounted. The locking hook 2 and the abutting lever 3 are rotatably mounted on the male fixing post 13 and the female fixing post 14 via the male mounting shaft 21 and the female mounting shaft 31, respectively. This allows the locking hook 2 to rotate around the male fixing post 13, while the abutting lever 3 can rotate around the female fixing post 14.

[0017] A torsion spring is fitted onto the sub-fixing post 13, and a sub-torsion spring groove 23 and a female torsion spring groove 24 are correspondingly provided on the locking hook 2. The torsion spring allows the locking hook 2 to compress the torsion spring after rotation, and automatically reset due to the elastic force of the torsion spring when released.

[0018] The female torsion spring groove 24 features a 30° guide slope. This facilitates the installation and insertion of the torsion spring, enabling quick and easy installation. Without the guide slope, the end of the torsion spring needs to be precisely aligned with the groove for insertion. This requires repeated adjustments by the operator, which is time-consuming and labor-intensive, severely impacting efficiency in mass production. The 30° slope creates a flared opening. Even if the end of the torsion spring is not perfectly aligned with the female torsion spring groove 24, the slope automatically guides and corrects the position of the torsion spring end during downward pressing, allowing it to slide smoothly into the female torsion spring groove 24. This reduces the difficulty of installation and the skill requirements for the operator.

[0019] Furthermore, the interference difference between the sub-torsion spring groove 23 and the female torsion spring groove 24 is less than 0.05mm. This solves the problems of uneven force distribution and stress concentration in the torsion spring, ensuring a highly coordinated fit between the torsion spring foot and the sub-torsion spring groove 23 and the female torsion spring groove 24. Controlling the interference difference to within 0.05mm ensures that the clamping force of the sub-torsion spring groove 23 and the female torsion spring groove 24 on the torsion spring foot is almost identical. This allows the two fixing points to simultaneously and evenly distribute the load during operation and preload, achieving better force transmission and improving the service life of the torsion spring.

[0020] The lock housing 1 has a lock opening 12 on one side, and the lock hook 2 has a locking opening 22 that matches the lock opening 12.

[0021] A torsion spring is wound around the sub-fixed post 13. The torsion spring has a wire diameter of 0.8mm and an effective winding count of 5 turns. The torsion spring uses a smaller wire diameter and a larger number of turns, resulting in lower working stress, longer fatigue life, and smoother operation. This makes it suitable for high-frequency use scenarios, prioritizing an exceptionally long service life.

[0022] In this embodiment, the housing 1 also contains electromagnets and other locking-related driving components, which cooperate with the locking hook 2 and the abutment lever 3 to form the main body of the locking mechanism. These are all existing technologies and are not part of the technical problem of improving service life that this technical solution aims to address; therefore, they will not be elaborated upon in this technical solution.

[0023] In machining, cutting tools inevitably leave tiny, barely perceptible burrs, sharp corners, or microcracks on their edges. Under the frequent reciprocating motion of the lever and impact loads, stress will be highly concentrated at these sharp points, eventually leading to the initiation and propagation of fatigue cracks, until fracture.

[0024] This design fundamentally eliminates sharp geometric corners by cutting the 90-degree right-angled edge into a small bevel, allowing stress to pass smoothly rather than escalate abruptly. This significantly improves the fatigue strength of the parts, thereby extending the service life of the support lever and preventing premature fracture due to fatigue.

[0025] Furthermore, the contact area between the abutting surface 25 and the top surface 32 is greater than 70%, which ensures that there is a large contact area when abutting, which can not only further improve the abutting effect, but also extend its service life.

[0026] In this invention, by increasing the contact area of ​​the abutting surface 25 and the top surface 32 to over 70%, contact stress and frictional wear can be reduced, thus preventing abnormal noises and functional failures after long-term use. By setting the interference fit between the sub-torsion spring groove 23 and the female torsion spring groove 24 on the lock hook 2, the torsion spring is subjected to uniform force, which improves the fixing reliability and fatigue life of the torsion spring. Furthermore, by limiting the wire diameter and the effective number of winding turns of the torsion spring, the service life of the torsion spring can be further improved, thereby significantly increasing the overall service life of the electronic lock.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A long-life electronic lock for cabinets, comprising a lock housing (1), wherein a lock hook (2) and a stop lever (3) are rotatably disposed within the lock housing (1), characterized in that, The locking hook (2) is provided with an abutting surface (25), and the abutting lever (3) is provided with a corresponding abutting surface (32), and the contact area between the abutting surface (25) and the abutting surface (32) is greater than 70%. Both sides of the locking hook (2) are provided with sub-torsion spring grooves (23), the interference of the sub-torsion spring grooves (23) is 0.02-0.03mm, and one side of the locking hook (2) is provided with a female torsion spring groove (24), the interference of the female torsion spring groove (24) is 0.05-0.08mm.

2. The long-service-life electronic lock for cabinets according to claim 1, characterized in that, The lock housing (1) has an installation cavity (11) inside. A sub-fixed post (13) and a female fixed post (14) are fixedly installed in the installation cavity (11). The lock hook (2) and the abutting lever (3) are respectively rotatably sleeved on the sub-fixed post (13) and the female fixed post (14) through the sub-installation shaft (21) and the female installation shaft (31).

3. The long-service-life electronic lock for cabinets according to claim 2, characterized in that, A torsion spring is fitted on the sub-fixed post (13), and a sub-torsion spring groove (23) and a female torsion spring groove (24) are provided on the locking hook (2) to match the torsion spring.

4. The long-service-life electronic lock for cabinets according to claim 3, characterized in that, The slot of the female torsion spring groove (24) is provided with a 30° guide slope, and the interference difference between the male torsion spring groove (23) and the female torsion spring groove (24) is less than 0.05 mm.

5. A long-service-life electronic lock for cabinets according to claim 1, characterized in that, The lock housing (1) has a lock opening (12) on one side, and the lock hook (2) has a locking opening (22) that is compatible with the lock opening (12).

6. The long-service-life electronic lock for cabinets according to claim 3, characterized in that, The sub-fixing post (13) is wound with a torsion spring with a wire diameter of 0.8 mm and an effective number of turns of the torsion spring of 5 turns.

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