A locking mechanism, a lock and a handcuff provided with the locking mechanism
By using torsion springs instead of traditional springs and combining them with a housing structure design, the problem of unstable lock movement was solved, thereby improving the stability and elasticity of the lock and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU TONGYONG LOCKS CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional helical compression springs are prone to deviation and have insufficient elasticity, resulting in unstable locking action and short service life.
A torsion spring is used instead of a traditional spring. The torsion spring has a larger diameter and better elasticity. Its stability is restricted by the space of the housing. The contact end between the lock and the torsion spring is provided with a groove to further restrict the movement, forming a U-shaped structure to improve stability.
Torsion springs offer better stability and stronger elasticity, preventing deviation and extending the lifespan of the lock.
Smart Images
Figure CN224351772U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lock technology, specifically a locking mechanism and a lock equipped with the locking mechanism. Background Technology
[0002] Currently, locks on the market typically use helical compression springs to push the lock gate, allowing it to engage with the corresponding locking position. For example, in a handcuff disclosed in document number US11016268, the lock gate is pushed by a helical compression spring. Helical compression springs are prone to deviation under external force, causing them to fail to perform their function. Furthermore, traditional helical compression springs are limited by space constraints (e.g., thinner product thickness), resulting in lower elasticity. Over time, the reduced elasticity fails to meet the requirements, leading to a short service life. Utility Model Content
[0003] The technical problem to be solved by this utility model is how to improve the stability of the locking action.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A locking mechanism includes a lock gate and a lock gate housing, the lock gate being movably mounted on the lock gate housing. It also includes a torsion spring and a torsion spring housing, the torsion spring housing having a space for installing the torsion spring, one end of the torsion spring abutting against the inner wall of the space, and the other end of the torsion spring abutting against the lock gate.
[0006] Preferably, the torsion spring is compressed and installed in the space of the torsion spring housing, and the space is insufficient for the torsion spring to be in the extended state.
[0007] Preferably, one end of the torsion spring abuts against the end of the locking gate, and the end of the locking gate is provided with a groove for the end of the torsion spring to be engaged in, and one end of the torsion spring is engaged in the groove.
[0008] Preferably, the torsion spring portion that abuts against the end of the lock is U-shaped.
[0009] Preferably, the lock housing and the torsion spring housing are either an integral structure or separate structures.
[0010] This application also provides a lock with the above-mentioned locking mechanism, including a lock cylinder, a rotating member at the end of the lock cylinder, the rotating member being at least partially eccentric, and the eccentric part extending into the lock gate, the rotating member rotating to drive the eccentric part to push the lock gate to unlock.
[0011] Preferably, the side of the lock is provided with a groove for the eccentric part of the rotating component to be inserted.
[0012] Preferably, the side of the locking gate away from the torsion spring is an inclined surface or an arc surface.
[0013] This application also provides a handcuff equipped with the aforementioned lock.
[0014] The beneficial effects of this utility model are: this utility model replaces the traditional spring with a torsion spring, the torsion spring has a thicker diameter and better elasticity, and the torsion spring will not deviate due to the limitation of installation space, so its stability is better. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the embodiment;
[0016] Figure 2 This is a schematic diagram of the internal structure of an embodiment;
[0017] Figure 3 This is a schematic diagram of the shell structure;
[0018] Figure 4 This is a schematic diagram of the gate's structure;
[0019] Figure 5 This is a schematic diagram of a torsion spring.
[0020] Explanation of reference numerals in the attached drawings: 1. Main body; 2. Fixed ring; 3. Moving ring; 31. Slot; 4. Locking gate; 41. Groove; 42. Slide groove; 5. Lock cylinder; 6. Rotating component; 61. Eccentric part; 7. Housing; 8. Torsion spring; 81. Moving end; 82. Fixed end; 83. Spiral body; 9. Space; 91. Abutting part. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example
[0023] Please see Figures 1-5The figure shows a handcuff comprising two handcuff bodies connected by a chain (one handcuff body is shown in the figure, the other is not shown). Each handcuff body includes a main body 1, a fixed ring 2, and a movable ring 3. The movable ring 3 is hinged to the fixed ring 2. One end of the fixed ring 2 is fixed to the main body 1, and the movable ring 3 can be inserted into the main body 1. The movable ring 3 has several slots 31. A movable locking gate 4 is located within the main body 1. Locking is achieved by the locking gate 4 engaging with the slots 31 on the movable ring 3. In this embodiment, a lock cylinder 5 is also located within the main body 1. A rotating component 6 is located at the end of the lock cylinder 5. The rotating component 6 is at least partially eccentric, and this eccentric portion 61 extends into the locking gate 4. Rotation of the rotating component 6 drives the eccentric portion 61 to push the locking gate 4 to unlock. The side of the locking gate 4 has a groove 42 for the eccentric portion 61 of the rotating component 6 to be inserted. The side of the locking gate 4 away from the torsion spring is a slope or arc surface, which, in conjunction with the torsion spring at the rear end of the locking gate 4, allows the locking gate 4 to lock automatically without a key. Simultaneously, even if the key is not removed, the lock remains in a locked state; it can only be unlocked by turning the key, thus achieving an automatic locking function. In this embodiment, the main body 1 is provided with a lock gate housing for the movement of the lock gate 4. The lock gate 4 is movably mounted on the lock gate housing. In this embodiment, the torsion spring housing and the lock gate housing are the same housing, although they can also be separate housings. They are collectively referred to as housing 7 below. In this embodiment, the housing 7 is provided with a torsion spring 8, and the housing 7 has a space 9 for installing the torsion spring 8. One end of the torsion spring 8 abuts against the inner wall of the space 9, and the other end of the torsion spring 8 abuts against the lock gate 4. In this embodiment, the torsion spring 8 is compressed and installed in the space 9 of the housing. This space 9 is insufficient for the torsion spring 8 to be in an extended state, giving it significant elasticity and preventing movement. In this embodiment, the end of the torsion spring 8 that contacts the lock 4 is defined as the movable end 81, and the other end as the fixed end 82. The spiral portion is defined as a spiral body 83. The space in the housing 7 for installing the torsion spring includes an abutment portion 91 that abuts the fixed end. This abutment portion 91 has a bent angle structure, which restricts the movement of the torsion spring 8. A groove 41 is provided on the end of the lock 4 that contacts the torsion spring, allowing the movable end 81 of the torsion spring to engage. The groove 41 further restricts the movement of the torsion spring, ensuring the stability of the lock 4's movement. In this embodiment, the space 9 is achieved by providing a recessed portion in the housing with an opening on one side, and fixing a cover to the opening side. Alternatively, the housing can be configured as two parts joined together; these are conventional techniques in the art and will not be described in detail here.
[0024] In this embodiment, the torsion spring part that abuts against the end of the lock 4 is in the form of a U-shaped structure. This part is an integral U-shaped structure, which is the middle section of the torsion spring. Since there are no gaps, this part has higher stability and will not cause defects such as jamming due to gaps.
Claims
1. A locking mechanism, comprising a locking gate and a locking gate housing, wherein the locking gate is movably mounted on the locking gate housing, characterized in that: It also includes a torsion spring and a torsion spring housing. The torsion spring housing has a space for installing the torsion spring. One end of the torsion spring abuts against the inner wall of the space, and the other end of the torsion spring abuts against the lock.
2. The locking mechanism as described in claim 1, characterized in that: The torsion spring is compressed and installed in the space of the torsion spring housing, and the space is insufficient for the torsion spring to be in the extended state.
3. A locking mechanism as described in claim 1 or 2, characterized in that: One end of the torsion spring abuts against the end of the locking gate, and a groove is provided on the end of the locking gate for the end of the torsion spring to be engaged in. One end of the torsion spring is engaged in the groove.
4. The locking mechanism as described in claim 3, characterized in that: The torsion spring part that abuts against the end of the lock is U-shaped.
5. The locking mechanism as described in claim 1, characterized in that: The lock housing and the torsion spring housing are either an integral structure or a separate structure.
6. A lock equipped with a locking mechanism according to any one of claims 1-5, characterized in that: The lock includes a lock cylinder, and a rotating component is provided at the end of the lock cylinder. The rotating component is at least partially eccentric, and the eccentric part extends into the lock gate. The rotation of the rotating component drives the eccentric part to push the lock gate to unlock.
7. The lock as described in claim 6, characterized in that: The side of the lock is provided with a groove for the eccentric part of the rotating component to be inserted.
8. The lock as described in claim 6, characterized in that: The side of the locking gate away from the torsion spring is an inclined surface or an arc surface.
9. A handcuff, characterized in that: The handcuffs are fitted with the lock as described in claim 6.