Mechanical combination lock with double safety

Abstract

The utility model relates to mechanical password lock field, proposes a kind of mechanical password lock with double safety structure, comprising: lock shell, the side surface rotationally connected with password dial of lock shell, the top of lock shell is equipped with lock hole, the inner side wall rotationally connected with lock post of lock hole, the inside of lock shell is provided with password unlocking device;The password unlocking device includes unlocking buckle, the inner wall rotationally connected in the top of password dial of unlocking buckle, the inner side wall slidingly connected with unlocking post of lock shell, the circumferential surface of unlocking post is fixedly connected with compression spring, the end of compression spring away from unlocking post is fixedly connected in the inner side wall of lock shell, the utility model is linked with the unlocking baffle of password unlocking device and mechanical unlocking device and forms linkage limit, must complete password matching and mechanical unlocking simultaneously, can trigger unlocking post movement, eliminate the risk of single password cracking or mechanical lock picking, and theft grade is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical combination locks, specifically to a mechanical combination lock with a double-security structure. Background Technology

[0002] Mechanical combination locks are locks that unlock using a mechanical structure combined with preset combinations of numbers and characters, without relying on electronic components.

[0003] The utility model patent CN2486672Y discloses a mechanical combination lock. Existing mechanical combination locks are complex in structure, large in size, and have few combination combinations. This utility model has shaft holes at both ends of the lock body for installing the lock cylinder shaft. The lock cylinder shaft is equipped with rotatable segmented bushings. The number of segmented bushings corresponds to the number of combination wheels and the number of grooves on the combination wheels. The segmented bushings pass through lock holes on the groove walls of the combination wheels. The lock holes have protrusions. Each bushing is equipped with a combination wheel. Each bushing has a tooth that engages with any one of the 10 grooves in the combination wheel. The outer circumference of the combination wheel corresponding to the 10 grooves is numbered 0 to 9. The structure is simple, the size is small, the combination combinations are numerous, and it is not easy to open. This utility model is widely applicable to various occasions that require locking.

[0004] In the aforementioned application, the mechanical combination lock uses only a single password to unlock through the cooperation of the segmented bushing and the combination wheel, making it difficult to achieve the function of dual security protection. As a result, the lock relies on only a single unlocking mode and is easily cracked due to password leakage, brute force password matching, etc., resulting in insufficient anti-theft level. Therefore, we propose a mechanical combination lock with a dual-security structure. Utility Model Content

[0005] This invention proposes a mechanical combination lock with a double-security structure.

[0006] The technical solution of this utility model is as follows: A mechanical combination lock with a double-security structure includes: a lock shell, a combination dial rotatably connected to the side of the lock shell, a lock hole opened on the top of the lock shell, a lock pin rotatably connected to the inner side wall of the lock hole, and a combination unlocking device provided inside the lock shell. The password unlocking device includes an unlocking buckle, the inner wall of which is rotatably connected to the top of the password turntable. An unlocking pin is slidably connected to the inner side wall of the lock shell. A compression spring is fixedly connected to the circumferential surface of the unlocking pin. The end of the compression spring away from the unlocking pin is fixedly connected to the inner side wall of the lock shell. A force-bearing baffle is fixedly connected to the circumferential surface of the unlocking pin.

[0007] A locking and unlocking pin is fixedly connected to the side of the force-bearing baffle. One end of the unlocking pin has an alignment groove that matches the locking pin. The locking and unlocking pin is fixedly connected to the force-bearing baffle to ensure stable transmission of the unlocking force. The alignment groove and the locking pin are precisely matched, so that the unlocking pin and the locking pin form a locking engagement through the alignment groove.

[0008] The top of the unlocking buckle has an insertion slot, and the locking unlocking pin is located on the displacement trajectory of the insertion slot and is inserted when the password is matched. The insertion slot provides a dedicated insertion position for the locking unlocking pin. After the password is matched, the locking unlocking pin is accurately inserted into the insertion slot, which drives the unlocking pin to move and release the locking state between the alignment slot and the locking pin.

[0009] The number of locking and unlocking pins and unlocking buckles is three, and they are distributed in a linear array on the side of the force-bearing baffle and the top of the combination wheel. The three locking and unlocking pins and unlocking buckles distributed in a linear array increase the complexity of the combination and enhance the anti-theft performance.

[0010] The lock housing is equipped with a mechanical unlocking device, which includes a lock cylinder. The bottom of the lock cylinder is fixedly connected to the inner bottom wall of the lock housing. An unlocking groove is formed on the circumferential surface of the lock cylinder. A connecting plate is rotatably connected to the top of the lock cylinder. An unlocking baffle is engaged with the side of the connecting plate.

[0011] The side of the unlocking baffle is located on the displacement trajectory of the force-baffle. The unlocking baffle achieves double-safety linkage control through position limitation. When mechanical unlocking is not performed, the unlocking baffle blocks the movement of the force-baffle, and even if the password matches, unlocking cannot be completed, thus preventing a single unlocking method from being effective.

[0012] The number of combination dials is set to three, and they are distributed in a linear array on the side of the lock case. The three combination dials correspond to three sets of unlocking logic, further increasing the number of combination combinations and improving anti-cracking performance.

[0013] A spring is elastically connected to the bottom of the locking cylinder, and the end of the spring away from the locking cylinder is fixedly connected to the inner wall of the lock case. The spring provides an elastic ejection force to the locking cylinder, which automatically pushes the locking cylinder out after unlocking, enabling quick unlocking of the lock and improving ease of use.

[0014] The working principle and beneficial effects of this utility model are as follows: 1. The password unlocking device and the mechanical unlocking device of this utility model form a linkage limit, and password matching and mechanical unlocking must be completed simultaneously to trigger the movement of the unlocking column, eliminating the risk of single password cracking or mechanical lock picking, and greatly improving the anti-theft level.

[0015] 2. This utility model uses a mechanical unlocking device to rigidly limit the force-bearing baffle through the unlocking baffle. Even if the password unlocking device is cracked, the unlocking action cannot be triggered without mechanical unlocking, thus improving the overall anti-theft level.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a structural schematic diagram of the overall three-dimensional appearance of this utility model; Figure 2 This is a three-dimensional cross-sectional structural diagram of the lock housing of this utility model; Figure 3 This is a schematic diagram of the password unlocking device of this utility model; Figure 4 This is a schematic diagram of the mechanical unlocking device of this utility model; Figure 5 This utility model Figure 3 A magnified three-dimensional structural diagram of A.

[0019] In the diagram: 1. Lock case; 2. Lock pin; 3. Combination dial; 4. Combination unlocking device; 5. Mechanical unlocking device; 6. Push-out spring; 401. Unlocking latch; 402. Unlocking pin; 403. Force-bearing baffle; 404. Locking unlocking pin; 405. Compression spring; 406. Insertion slot; 501. Lock cylinder; 502. Unlocking slot; 503. Connecting plate; 504. Unlocking baffle. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1 like Figures 1-5 As shown, this embodiment proposes a mechanical combination lock with a double-security structure, including: a lock shell 1, a combination dial 3 rotatably connected to the side of the lock shell 1, a lock hole opened on the top of the lock shell 1, a lock pin 2 rotatably connected to the inner side wall of the lock hole, and a combination unlocking device 4 provided inside the lock shell 1. The combination unlocking device 4 includes an unlocking buckle 401, the inner wall of which is rotatably connected to the top of the combination dial 3. An unlocking pin 402 is slidably connected to the inner side wall of the lock housing 1. A compression spring 405 is fixedly connected to the circumferential surface of the unlocking pin 402. The end of the compression spring 405 away from the unlocking pin 402 is fixedly connected to the inner side wall of the lock housing 1. A force-bearing baffle 403 is fixedly connected to the circumferential surface of the unlocking pin 402.

[0022] A locking and unlocking pin 404 is fixedly connected to the side of the force-bearing baffle 403. One end of the unlocking pin 402 has an alignment groove that is adapted to the locking pin 2. The locking and unlocking pin 404 is fixedly connected to the force-bearing baffle 403 to ensure stable transmission of the unlocking force. The alignment groove is precisely adapted to the locking pin 2, so that the unlocking pin 402 and the locking pin 2 form a locking engagement through the alignment groove.

[0023] The top of the unlocking buckle 401 has an insertion slot 406. The locking unlocking post 404 is located on the displacement trajectory of the insertion slot 406 and is inserted when the password is matched. The insertion slot 406 provides a dedicated insertion station for the locking unlocking post 404. After the password is matched, the locking unlocking post 404 is precisely inserted into the insertion slot 406, which drives the unlocking post 402 to move, thereby releasing the locking state between the alignment slot and the locking post 2.

[0024] There are three locking and unlocking pins 404 and three unlocking buckles 401, which are distributed in a linear array on the side of the force-bearing baffle 403 and the top of the combination wheel 3. The three locking and unlocking pins 404 and unlocking buckles 401 are distributed in a linear array, which increases the complexity of the combination and enhances the anti-theft performance.

[0025] In this embodiment, in the initial locked state, the compression spring 405 is in a naturally extended state, and the unlocking pin 402 is locked in place with the locking pin 2 through the alignment slot. The push-out spring 6 is compressed and stored by the locking pin 2. At the same time, the unlocking baffle 504 is on the displacement path of the force-bearing baffle 403. The insertion slots 406 of the three unlocking buckles 401 are all misaligned with the corresponding locking unlocking pins 404, and the locking unlocking pins 404 cannot be inserted into the insertion slots 406. When the user rotates the three password dials 3 to match the password, the password dials 3 drive the unlocking buckles 401 at the top to rotate synchronously until the insertion slots 406 of the three unlocking buckles 401 are all precisely aligned with the locking unlocking pins 404 on the side of the force-bearing baffle 403. For proper alignment, the mechanical unlocking device 5 is required. The key is inserted into the unlocking slot 502 of the lock cylinder 501 and rotated. The lock cylinder 501 drives the connecting plate 503 to rotate synchronously, which in turn drives the unlocking baffle 504 to touch the force-bearing baffle 403. After mechanical unlocking is completed, the locking unlocking pin 404 is inserted into the corresponding insertion slot 406 in an unobstructed state. The force-bearing baffle 403 drives the unlocking pin 402 to slide along the inner wall of the lock shell 1. The compression spring 405 is compressed and stored. During the movement of the unlocking pin 402, the alignment slot at its end disengages from the locking pin 2. The compressed ejection spring 6 releases its elasticity and automatically pushes the locking pin 2 out of the keyhole, realizing the overall unlocking of the lock.

[0026] Example 2 like Figures 1-5 As shown, based on the same concept as in Embodiment 1 above, this embodiment also proposes that the lock housing 1 is provided with a mechanical unlocking device 5 inside. The mechanical unlocking device 5 includes a lock cylinder 501. The bottom of the lock cylinder 501 is fixedly connected to the inner bottom wall of the lock housing 1. An unlocking groove 502 is opened on the circumferential surface of the lock cylinder 501. A connecting plate 503 is rotatably connected to the top of the lock cylinder 501. An unlocking baffle 504 is engaged on the side of the connecting plate 503.

[0027] The side of the unlocking baffle 504 is located on the displacement trajectory of the force-baffle 403. The unlocking baffle 504 achieves double-safety linkage control through position limitation. When mechanical unlocking is not performed, the unlocking baffle 504 blocks the movement of the force-baffle 403, and even if the password is matched, unlocking cannot be completed, thus preventing a single unlocking method from being effective.

[0028] The number of combination dials 3 is set to three, and they are distributed along a linear array on the side of the lock case 1. The three combination dials 3 correspond to three sets of unlocking logic, further increasing the number of combination combinations and improving anti-cracking performance.

[0029] A spring 6 is elastically connected to the bottom of the locking pin 2. The end of the spring 6 away from the locking pin 2 is fixedly connected to the inner wall of the lock housing 1. The spring 6 provides an elastic ejection force to the locking pin 2. After unlocking, it can automatically push the locking pin 2 out, realizing quick unlocking of the lock and improving ease of use.

[0030] In this embodiment, the mechanical unlocking device 5 requires the key to be inserted into the unlocking slot 502 of the lock cylinder 501 and rotated. The lock cylinder 501 drives the connecting plate 503 to rotate synchronously, thereby causing the unlocking baffle 504 to touch the force baffle 403. After the mechanical unlocking is completed, since the password unlocking device 4 has performed password matching, the locking unlocking pin 404 is inserted into the corresponding insertion slot 406 in an unobstructed state, and the unlocking pin 402 is driven to slide along the inner wall of the lock shell 1 through the linkage of the force baffle 403. The compression spring 405 is compressed and stored. During the movement of the unlocking pin 402, the alignment slot at its end disengages from the locking pin 2. The compressed ejection spring 6 releases its elasticity and automatically pushes the locking pin 2 out of the keyhole, realizing the overall unlocking of the lock. After unlocking, the key is pulled out, and the lock cylinder 501 rotates under the action of its own return spring. The connecting plate 503 drives the unlocking baffle 504 to return to the initial position. The compression spring 405 releases its elasticity and pushes the unlocking pin 402 and the force baffle 403 to return to the original position, and the lock returns to the locked state.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mechanical combination lock with a double-security structure, characterized in that, include: The lock housing (1) has a combination dial (3) rotatably connected to its side. The top of the lock housing (1) has a lock hole, and the inner wall of the lock hole is rotatably connected to a lock pin (2). The lock housing (1) is equipped with a combination unlocking device (4). The password unlocking device (4) includes an unlocking buckle (401), the inner wall of which is rotatably connected to the top of the password turntable (3), the inner side wall of the lock shell (1) is slidably connected to an unlocking pin (402), the circumferential surface of the unlocking pin (402) is fixedly connected to a compression spring (405), the end of the compression spring (405) away from the unlocking pin (402) is fixedly connected to the inner side wall of the lock shell (1), and the circumferential surface of the unlocking pin (402) is fixedly connected to a force-bearing baffle (403).

2. A mechanical combination lock with a double-security structure according to claim 1, characterized in that, The side of the force-bearing baffle (403) is fixedly connected to a locking and unlocking post (404), and one end of the unlocking post (402) is provided with an alignment slot, which is adapted to the locking post (2).

3. A mechanical combination lock with a double-security structure according to claim 2, characterized in that, The top of the unlocking buckle (401) is provided with an insertion slot (406), and the locking unlocking post (404) is located on the displacement trajectory of the insertion slot (406) and is embedded when the password is matched.

4. A mechanical combination lock with a double-security structure according to claim 3, characterized in that, The number of locking and unlocking pins (404) and unlocking buckles (401) are both three, and they are distributed in a linear array on the side of the force baffle (403) and the top of the password turntable (3).

5. A mechanical combination lock with a double-security structure according to claim 4, characterized in that, The lock housing (1) is provided with a mechanical unlocking device (5). The mechanical unlocking device (5) includes a lock cylinder (501). The bottom of the lock cylinder (501) is fixedly connected to the inner bottom wall of the lock housing (1). The circumferential surface of the lock cylinder (501) is provided with an unlocking groove (502). The top of the lock cylinder (501) is rotatably connected to a connecting plate (503). The side of the connecting plate (503) is engaged with an unlocking baffle (504).

6. A mechanical combination lock with a double-security structure according to claim 5, characterized in that, The side of the unlocking baffle (504) is located on the displacement trajectory of the force-baffle (403).

7. A mechanical combination lock with a double-security structure according to claim 6, characterized in that, The number of the password turntables (3) is set to three, and they are distributed along a linear array on the side of the lock case (1).

8. A mechanical combination lock with a double-security structure according to claim 7, characterized in that, The bottom of the locking pin (2) is elastically connected to an ejector spring (6), and the end of the ejector spring (6) away from the locking pin (2) is fixedly connected to the inner wall of the lock case (1).

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