A self-closing, pry-resistant lock device

Abstract

The utility model discloses a kind of self-closing pry-proof lock device, comprising: mounting bracket, lock cylinder, two hooks and two lock catches;The lock cylinder is fixedly connected in the middle part of the mounting bracket;Two hooks are respectively arranged in the left and right sides of the lock cylinder and are drivingly connected with the lock cylinder;Two lock catches are respectively matched with two hooks, with the first state of clamping locking and the second state of loosening unlocking;The lock cylinder can drive two hooks from the first state of clamping locking to the second state of loosening unlocking;The utility model realizes the symmetrical opening and closing action of hook by bilateral linkage mechanical transmission mode, not only improves the balance and stability of locking process, but also enhances the anti-external force damage capacity of overall structure, effectively prevents deformation or failure caused by unilateral stress.

Description

Technical Field

[0001] This utility model relates to the field of locks, and more specifically, to a self-closing anti-pry lock device. Background Technology

[0002] The locks on existing cabinets or doors usually use pin tumbler locks. However, the internal structure of pin tumbler locks is relatively simple, usually consisting of only pins and springs. The lock body is small, but because pin tumbler locks have a short bolt travel and weak retraction force, and the bolt is exposed when the lock is closed, thin metal sheets, cards or other tools can be inserted from the door or cabinet gaps to directly slide the bolt back, thus achieving keyless opening, resulting in weak mechanical protection capabilities.

[0003] High-security locks are often complex in structure, expensive, and have high operating costs. Therefore, there is a need for a self-closing anti-pry lock device that is high in security, easy to operate, and inexpensive. Utility Model Content

[0004] The purpose of this invention is to provide a self-closing anti-pry lock device to overcome the above-mentioned defects in the prior art.

[0005] The technical solution to achieve the purpose of this utility model is: a self-closing anti-pry lock device, comprising: a mounting bracket, a lock cylinder, two lock hooks, and two lock catches; the lock cylinder is fixedly connected to the middle of the mounting bracket; the two lock hooks are respectively disposed on the left and right sides of the lock cylinder and are pulsatorically connected to the lock cylinder; the two lock catches are respectively corresponding to and cooperate with the two lock hooks, having a first state of engagement and locking and a second state of release and unlocking; the lock cylinder can drive the two lock hooks from the first state of engagement and locking to the second state of release and unlocking.

[0006] Preferably, the lock cylinder includes a keyhole, a gear, and two rack connecting rods. The keyhole and the gear are concentrically arranged and fixedly connected. The two rack connecting rods are respectively engaged and movably connected to the upper and lower sides of the gear. The two rack connecting rods are respectively fixedly connected to one of the lock hooks.

[0007] Preferably, the included angle of the hook portion is 90°.

[0008] Preferably, the two locking hooks are symmetrically arranged on both sides of the lock cylinder.

[0009] Preferably, the mounting bracket has a lock hook guide groove on each of its left and right sides, and the lock hook guide groove has a through hole facing the lock cylinder; the lock hook has a connecting rod integrally provided at the end away from the hook part, the connecting rod passes through the through hole of the lock hook guide groove and is fixedly connected to the corresponding rack connecting rod, and the lock hook is slidably disposed in the corresponding lock hook guide groove; a limiting guide hole is provided above the lock hook guide groove, and the lock hook passes through the limiting guide hole upward.

[0010] Preferably, a spring is sleeved on the connecting rod of the locking hook, and the spring provides a force to the locking hook in the direction of the locking latch.

[0011] Preferably, the connecting rod of the locking hook is fixedly provided with an anti-detachment pin.

[0012] Preferably, the head of the locking hook has a plane that slopes downward toward the locking buckle.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] (1) When the key is inserted and rotated, the gear drives the upper and lower rack connecting rods to make linear movements in opposite directions, thereby driving the lock hooks on the left and right sides to extend and retract synchronously. This mechanical transmission method with double-sided linkage realizes the symmetrical opening and closing action of the lock hooks, which not only improves the balance and stability of the locking process, but also enhances the overall structure's resistance to external force damage, effectively preventing deformation or failure caused by unilateral force.

[0015] (2) The hook of this utility model has an included angle of 90°. This geometric design enables the hook to form a stable right-angle engagement after it is engaged with the lock.

[0016] (3) The design of the lock hook guide groove of this utility model ensures that the lock hook always maintains a precise straight trajectory during the movement, avoiding deflection, jamming or shaking, improving the reliability of the action and the accuracy of repeated positioning, and also enhancing the resistance to external impact and vibration.

[0017] (4) The spring of this utility model provides a continuous force to the lock hook in the direction of the lock. Once the lock cylinder is unlocked (such as by rotating in the opposite direction), the spring can also push the lock hook to retract automatically, realizing the "self-closing" function. That is, the door can be automatically locked without any additional operation after closing, which greatly improves the convenience and safety of use. It is especially suitable for places that are frequently opened and closed but require a high level of security.

[0018] (5) As a mechanical limiting element, the anti-detachment pin of this utility model can effectively prevent the lock hook from accidentally falling off the end of the guide groove due to spring force, severe vibration or human prying, thus ensuring the integrity and long-term operational stability of the entire locking system. Although the structure is small, it greatly enhances the durability and anti-vandalism capability of the device.

[0019] (6) When the lock hook approaches the latch, the inclined surface of this utility model can contact the edge of the latch and generate an inward pushing force, forcing the lock hook to overcome the spring resistance and automatically retract. After passing the latch, it will pop out again under the action of the spring and complete the locking. This is the core of the so-called "automatic locking" or "self-closing" mechanism. The user only needs to close the door, and the system can automatically complete the locking action without the need for manual operation of the key or button, which is both convenient and reliable. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0021] Figure 1 This is an application state diagram of a self-closing anti-pry lock device.

[0022] Figure 2 This is a front view of the lock body of a self-closing anti-pry lock device.

[0023] Figure 3 This is a top view of the lock body of a self-closing anti-pry lock device.

[0024] The labels in the attached diagram are as follows: 1. Mounting bracket; 2. Lock cylinder; 2-1. Keyhole; 2-2. Gear; 2-3. Rack and pinion connecting rod; 3. Lock hook; 4. Lock catch; 5. Lock hook guide groove; 6. Spring; 7. Anti-disengagement pin; 100. Door; 200. Cabinet. Detailed Implementation

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0031] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0032] (Example 1)

[0033] See Figure 1 A self-closing anti-pry lock device includes: a mounting bracket 1, a lock cylinder 2, two lock hooks 3, and two lock latches 4. The mounting bracket 1 is rectangular, and the lock cylinder 2 is rectangular and located at the center of the mounting bracket 1; the two lock hooks 3 are symmetrically arranged on the left and right sides of the lock cylinder 2; the lock cylinder 2 includes a keyhole 2-1, a gear 2-2, and two rack connecting rods 2-3, the keyhole 2-1 and the gear 2-2 are concentrically arranged and fixedly connected, and the two rack connecting rods 2-3 are respectively engaged and movably connected to the upper and lower sides of the gear 2-2; the two lock hooks 3 are respectively arranged on the left and right sides of the lock cylinder 2, and the two rack connecting rods 2-3 are respectively fixedly connected to one lock hook 3.

[0034] Two latches 4 are respectively set with two locking hooks 3; the mounting bracket 1 is fixedly installed on the cabinet, and the two latches 4 are fixedly installed on the corresponding doors of the cabinet. When the cabinet is closed, the locking hooks 3 can be engaged with the corresponding latches 4.

[0035] Furthermore, see Figure 2 and Figure 3 The locking hook 3 is T-shaped, with a 90° included angle at its head. A connecting rod perpendicular to the body of the locking hook 3 is located at the end furthest from the hook. The head of the locking hook 3 has a plane that slopes downwards towards the latch 4. This T-shaped structure with a 90° included angle at the head ensures a stable right-angle engagement after the locking hook is engaged with the latch. The T-shaped structure is easy to process and shape, balancing structural strength and manufacturing cost.

[0036] Furthermore, each of the left and right sides of the mounting bracket 1 is provided with a hook guide groove 5, and the hook guide groove 5 has a through hole facing the lock cylinder 2; the connecting rod of the hook 3 passes through the through hole of the hook guide groove 5 and is fixedly connected to the corresponding rack connecting rod 2-3, and the hooks 3 are slidably set in the corresponding hook guide grooves 5; a limiting guide hole is provided above the hook guide groove 5, and the hook 3 passes through the limiting guide hole upward. The design of the hook guide groove ensures that the hook always maintains a precise straight trajectory during the movement, avoiding deflection, jamming or shaking, improving the reliability of the action and the repeatability of positioning accuracy, and also enhancing the resistance to external impact and vibration.

[0037] A spring 6 is fitted onto the connecting rod of the lock hook 3, and the spring 6 provides a force to the lock hook 3 in the direction of the latch 4. The spring provides a continuous force to the lock hook in the direction of the latch. Once the lock cylinder is unlocked (e.g., by rotating in the opposite direction), the spring can also push the lock hook to automatically retract, realizing the "self-closing" function. That is, the door will automatically lock after closing without any additional operation, which greatly improves the convenience and security of use, and is especially suitable for places that are frequently opened and closed but require a high level of security.

[0038] The connecting rod of the locking hook 3 is fixedly equipped with an anti-detachment pin 7. As a mechanical limiting element, the anti-detachment pin can effectively prevent the locking hook from accidentally falling off the end of the guide groove due to spring force, severe vibration, or manual prying, ensuring the integrity and long-term operational stability of the entire locking system. Although small, this structure greatly enhances the durability and vandal resistance of the device.

[0039] In this embodiment, when the key is inserted and rotated, the gear drives the upper and lower rack connecting rods to move in opposite directions in a linear motion, thereby driving the lock hooks on both sides to extend and retract synchronously. This dual-sided linkage mechanical transmission method achieves symmetrical opening and closing of the lock hooks, which not only improves the balance and stability of the locking process, but also enhances the overall structure's resistance to external force damage, effectively preventing deformation or failure caused by unilateral force. This self-closing anti-pry lock device achieves an organic combination of high security, high reliability, and ease of use through multiple innovative designs, including gear-rack dual-sided linkage transmission, "T"-shaped high-strength lock hooks, precision guide structure, return spring, anti-disengagement pin limit, and guide slope. It not only effectively solves the problems of traditional small pin tumbler locks being easily opened by inserting pieces and having poor anti-pry capabilities, but also has an automatic locking function, greatly improving the protection level and user experience, and has good practical value and promotion prospects.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-closing anti-pry lock device, characterized in that, include: Mounting bracket (1), lock cylinder (2), two locking hooks (3) and two latches (4); the lock cylinder (2) is fixedly connected to the middle of the mounting bracket (1); the two locking hooks (3) are respectively located on the left and right sides of the lock cylinder (2) and are connected to the lock cylinder (2) in a transmission manner; the two latches (4) are respectively corresponding to and cooperate with the two locking hooks (3), having a first state of locking and a second state of unlocking; the lock cylinder (2) can drive the two locking hooks (3) from the first state of locking to the second state of unlocking.

2. The self-closing anti-pry lock device according to claim 1, characterized in that: The lock cylinder (2) includes a keyhole (2-1), a gear (2-2), and two rack connecting rods (2-3). The keyhole (2-1) and the gear (2-2) are concentrically arranged and fixedly connected. The two rack connecting rods (2-3) are respectively meshed and movably connected to the upper and lower sides of the gear (2-2). The two rack connecting rods (2-3) are respectively fixedly connected to one of the lock hooks (3).

3. The self-closing anti-pry lock device according to claim 2, characterized in that: The included angle of the hook part of the lock hook (3) is 90°.

4. A self-closing anti-pry lock device according to claim 2, characterized in that: The two locking hooks (3) are symmetrically arranged on both sides of the lock cylinder (2).

5. A self-closing anti-pry lock device according to claim 2, characterized in that: The mounting bracket (1) has a lock hook guide groove (5) on each of its left and right sides. The lock hook guide groove (5) has a through hole facing the lock cylinder (2). The lock hook (3) has a connecting rod integrally provided at one end away from the hook part. The connecting rod passes through the through hole of the lock hook guide groove (5) and is fixedly connected to the corresponding rack connecting rod (2-3). The lock hook (3) is slidably disposed in the corresponding lock hook guide groove (5). A limiting guide hole is provided above the lock hook guide groove (5). The lock hook (3) passes through the limiting guide hole upward.

6. A self-closing anti-pry lock device according to claim 5, characterized in that: A spring (6) is fitted on the connecting rod of the hook (3), and the spring (6) provides a force to the hook (3) in the direction of the latch (4).

7. A self-closing anti-pry lock device according to claim 6, characterized in that: The connecting rod of the locking hook (3) is fixedly provided with a locking pin (7).

8. A self-closing anti-pry lock device according to claim 3, characterized in that: The head of the hook (3) is provided with a plane that slopes downward toward the latch (4).

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