A U-shaped password lock with retrievable password

Abstract

This utility model discloses a U-shaped combination lock with a recoverable password, including a lock body and a lock beam. The lock body has two parallel keyholes on both sides. The lock body has a locking mechanism in its center that locks the lock beam to the lock body when both ends of the lock beam are inserted into the two keyholes. The locking mechanism includes a spindle with spindle springs at both ends and a number wheel core in its center. Multiple number wheels are engaged on the number wheel core, with the outer surfaces of the number wheels protruding from the lock body. The number wheel core has grooves and a password-finding pin hole. A locking plate is provided inside the lock body corresponding to the locking mechanism, and the locking plate has protrusions. This utility model, by setting up a password-finding structure, allows users to retrieve their password using a key and a password-finding pin when they forget it, avoiding the need for external force to unlock the lock, making it more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of combination lock technology, specifically a U-shaped combination lock with a recoverable password. Background Technology

[0002] U-shaped locks are a widely used type of lock. Traditional U-shaped locks are mechanical and require the user to insert a key to unlock them. As people's needs for convenience have increased, U-shaped combination locks have appeared on the market. These locks do not require a key; the user only needs to enter a password to unlock them.

[0003] For example, patent application number 202421905386.6 discloses a U-shaped combination lock, which includes a lock body and a U-shaped locking beam. The lock body also includes a locking mechanism that locks the beam to the lock body. The locking mechanism includes a roller combination lock, where the outer surface of the roller is exposed outside the lock body. The lock body contains a pressing block and a supporting spring. The pressing block has a first end and a second end at two points perpendicular to the wheel axle of the roller combination lock. The lock body has a guide post, and the pressing block has a guide hole penetrating its second end. The guide post is located within the guide hole. The supporting spring acts on the pressing block, causing its first end to abut against the inner wall of the lock body. A through hole is located on the outer side of the lock body corresponding to the position where the first end of the pressing block abuts. The pressing block abuts against one end of the wheel axle. When the pressing block moves against the elastic force of the supporting spring, it can push the wheel axle to translate. It has advantages such as high reliability.

[0004] However, in real-life applications, users often inevitably encounter the problem of forgetting their passwords. This situation is common in practice, causing great inconvenience to users. Although the aforementioned patented technology performs well in many aspects, unfortunately, it does not include a function to assist users in retrieving their passwords. Therefore, when users unfortunately forget their passwords, they cannot rely on the patented technology itself to solve this problem and are forced to seek external assistance to unlock the lock through other means. This limitation undoubtedly weakens the practicality and user experience of the combination lock. Utility Model Content

[0005] The purpose of this invention is to provide a U-shaped combination lock with a recoverable password to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A U-shaped combination lock with a recoverable password, comprising a lock body and a lock beam. The lock body has two parallel keyholes on both sides. The lock body has a locking mechanism in its center that locks the lock beam to the lock body when both ends of the lock beam are inserted into the two keyholes. The locking mechanism includes a spindle with spindle springs sleeved at both ends. A number wheel core is sleeved in the center of the spindle, and multiple number wheels are engaged on the number wheel core. The outer surfaces of the number wheels protrude from the lock body. The number wheel core has grooves and a password-finding pin hole. A locking plate is provided inside the lock body corresponding to the locking mechanism. The locking plate has protrusions, and one end of the locking plate has a locking protrusion. Two limiting posts are symmetrically arranged at the top of the lock body. Two limiting posts are slidably limited to both ends of the code-finding fixing block. A mounting plate is bolted to one side of the code-finding fixing block. A code-finding pin spring is installed on the side of the mounting plate inside the code-finding fixing block. A code-finding pin is fixedly installed at one end of the code-finding pin spring. Two return springs are installed on the side of the code-finding fixing block corresponding to the spindle. A lock cylinder assembly is also installed at the top of the lock body. An angle rotating block is provided on the lock cylinder assembly. Two locking blocks are symmetrically provided at the bottom of the lock body. One end of a locking block spring is fixed to the opposite end of the two locking blocks. The other end of the locking block spring is fixedly connected to a stop block provided in the lock body. A mating part is provided at the close end of the two locking blocks. A button protruding from the lock body is also provided at the bottom of the lock body.

[0007] The process involves rotating the number wheel to drive the digit wheel core. The digit wheel core has grooves that correspond to the protrusions on the locking plate. When the number wheel is rotated, the digit wheel core presses down on the locking plate to lock the device. When the password is correct, the grooves on the four digit wheel cores correspond to the protrusions on the locking plate, and the locking protrusions correspond to the clearance grooves. At this point, pressing the button will press against the mating part, and the mating part will be squeezed, causing the two locking blocks to pull back and disengage from the slots on the lock beam, thereby unlocking the device.

[0008] When a user forgets the combination lock, they use the included key to rotate the lock cylinder assembly 90°. This rotates the angled block, which in turn moves the code-finding block forward. This rotates the number wheels, causing the character wheel core to rotate until it reaches the corresponding position, where the code-finding pin hole aligns with the code-finding pin. The code-finding pin is then inserted into the pin hole, and the forgotten combination is found. This process is repeated until all four number wheels have found the combination. To change the combination, the included tool is inserted into the corresponding slot. This causes the spindle to disengage the character wheel core, allowing the combination to be changed.

[0009] Preferably, the angle rotating block has an eccentric structure, and its long end can push the code-finding fixing block to slide relative to the limiting post. Utilizing the mechanical principle of the eccentric wheel, when the angle rotating block rotates, its long end contacts the code-finding fixing block. As the angle rotating block rotates, its long end applies a thrust that changes direction to the code-finding fixing block.

[0010] Preferably, the code-finding pin and the code-finding pin hole are correspondingly arranged, and the locking mechanism is in the unlocked state when the code-finding pin is inserted into the code-finding pin hole. When the code-finding pin is inserted into the code-finding pin hole, the protrusion enters the groove, and the locking plate drives the locking protrusion to move so that it corresponds with the clearance groove. By pressing the button, the locking protrusion is inserted into the clearance groove, thereby unlocking. If the password is incorrect, the locking protrusion and the clearance groove do not correspond, and the locking protrusion will hinder the movement of the locking block, preventing the button from being pressed and achieving the purpose of locking.

[0011] Preferably, the protrusions and grooves are correspondingly arranged, and the locking mechanism is in the unlocked state when the protrusions enter the grooves.

[0012] Preferably, the locking block has a relief groove at one end near the locking protrusion, and the relief groove is provided corresponding to the locking protrusion.

[0013] Preferably, a working spring is provided between the locking plate and the lock body, and the working spring can realize the return of the locking plate.

[0014] Preferably, a key is inserted into the lock cylinder assembly.

[0015] Preferably, the mating part abuts against the button, and the locking beam has a U-shaped structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention involves inserting a key into the lock cylinder assembly and rotating it 90°. The lock cylinder assembly then rotates the angle rotating block. Because the angle rotating block has an eccentric structure, its long end pushes the code-finding fixing block to slide along the limiting post. At this time, the number wheel rotates, causing the character wheel core to rotate. When the character wheel core rotates to the position where the code-finding pin hole corresponds to the code-finding pin, the code-finding pin is inserted into the code-finding pin hole under the action of the code-finding pin spring. At this time, the password number corresponding to that number wheel is found, avoiding the situation where unlocking can only be done by external force, making it more convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0020] Figure 3This is a partial structural diagram of the present invention. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the internal structure of the lock body of this utility model;

[0022] Figure 5 This is a schematic diagram of the locking mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the mandrel and locking plate of this utility model. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the structure of the mandrel and locking plate of this utility model. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the connection structure between the code-finding pinhole and the character wheel core of this utility model.

[0026] In the diagram: 1. Lock body; 2. Lock beam; 3. Key; 4. Button; 5. Lock cylinder assembly; 6. Number wheel fixing block; 7. Locking block spring; 8. Number wheel core; 9. Number wheel core; 10. Spindle; 11. Locking plate; 12. Angle rotation block; 13. Lock hole; 14. Limiting post; 15. Return spring; 16. Locking block; 17. Mating part; 18. Stop block; 19. Spindle spring; 20. Mounting plate; 21. Number wheel spring; 22. Number wheel; 23. Locking protrusion; 24. Raised point; 25. Groove; 26. Actuating spring; 27. Number wheel hole; 28. Relief groove. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Please see Figure 1-8 This utility model provides a U-shaped combination lock with a recoverable password, including a lock body 1 and a lock beam 2. The lock body 1 has two parallel lock holes 13 on both sides. The lock body 1 has a locking mechanism in the middle, which locks the lock beam 2 and the lock body 1 when the two ends of the lock beam 2 are inserted into the two lock holes 13. The locking mechanism includes a spindle 10, with spindle springs 19 sleeved at both ends of the spindle 10. A number wheel core 9 is sleeved in the middle of the spindle 10. Multiple number wheels 8 are engaged on the number wheel core 9. The outer wheel surface of the number wheel 8 is exposed outside the lock body 1. The number wheel core 9 has a groove 25 and a code-finding pin hole 27. A locking plate 11 is provided inside the lock body 1 corresponding to the locking mechanism. The locking plate 11 has a protrusion 24 and a locking protrusion 23 at one end of the locking plate 11.

[0029] Two limiting posts 14 are symmetrically arranged at the top inside the lock body 1. The two limiting posts 14 are slidably limited to the two ends of the code finding fixing block 6. A mounting plate 20 is installed on one side of the code finding fixing block 6 by bolts. A code finding needle spring 21 is installed on the side of the mounting plate 20 inside the code finding fixing block 6. A code finding needle 22 is fixedly installed at one end of the code finding needle spring 21. Two return springs 15 are installed on the side of the code finding fixing block 6 corresponding to the spindle 10. The return springs 15 are used to return the code finding fixing block 6. A lock cylinder assembly 5 is also installed at the top inside the lock body 1. An angle rotating block 12 is provided on the lock cylinder assembly 5.

[0030] Two locking blocks 16 are symmetrically arranged at the bottom of the lock body 1. One end of the locking block spring 7 is fixed at the opposite end of the two locking blocks 16. The other end of the locking block spring 7 is fixedly connected to the stop block 18 provided in the lock body 1. The two locking blocks 16 are provided with a mating part 17 at the close end. A button 4 is also provided at the bottom of the lock body 1 that protrudes outside the lock body 1.

[0031] The angle rotating block 12 has an eccentric structure, and the long end of the angle rotating block 12 can push the code finding fixing block 6 to slide relative to the limiting post 14.

[0032] Specifically, utilizing the mechanical principle of the eccentric wheel, when the angle rotating block 12 rotates, its long end contacts the code-finding fixing block 6. As the angle rotating block 12 rotates, its long end applies a thrust that changes direction to the code-finding fixing block 6.

[0033] The code-finding pin 22 is correspondingly set with the code-finding pin hole 27, and the locking mechanism is in the unlocked state when the code-finding pin 22 is inserted into the code-finding pin hole 27. The protrusion 24 is correspondingly set with the groove 25, and the locking mechanism is in the unlocked state when the protrusion 24 enters the groove 25. The locking block 16 has a relief groove 28 at one end near the locking protrusion 23, and the relief groove 28 is correspondingly set with the locking protrusion 23.

[0034] Specifically, when the code-finding pin 22 is inserted into the code-finding pin hole 27, the protrusion 24 enters the groove 25. The locking plate 11 moves the locking protrusion 23 to align with the clearance groove 28. By pressing the button 4, the locking protrusion 23 is inserted into the clearance groove 28, thereby unlocking the device. If the code is incorrect, the locking protrusion 23 does not align with the clearance groove 28, and the locking protrusion 23 will obstruct the movement of the locking block 16, preventing the button 4 from being pressed and achieving the locking purpose.

[0035] A working spring 26 is provided between the locking plate 11 and the lock body 1.

[0036] Specifically, the action spring 26 enables the locking plate to return to its original position.

[0037] A key 3 is inserted into the lock cylinder assembly 5.

[0038] Specifically, the key 3 is inserted into the lock cylinder assembly 5 and rotated 90°. The lock cylinder assembly 5 drives the angle rotating block 12 to rotate. Since the angle rotating block 12 is an eccentric structure, its long end pushes the code finding fixing block 6 to slide along the limit post 14.

[0039] The mating part 17 abuts against the button 4, and the locking beam 2 has a U-shaped structure.

[0040] Working principle: When locking, rotate the number wheel 8, which drives the number wheel core 9 to rotate. The number wheel core 9 presses down on the locking plate 11, causing the locking protrusion 23 on the locking plate 11 to be misaligned with the clearance groove 28 on the locking block 16. At this time, the locking block 16 is locked by the locking block spring 7, thus locking the lock beam 2.

[0041] When unlocking, if the password is correct, that is, the grooves 25 of the four-digit wheel core 9 correspond to the protrusions 24 of the locking plate 11, and the locking protrusions 23 correspond to the clearance grooves 28, press the button 4. The button 4 presses against the mating part 17. The mating part 17 is squeezed, causing the two locking blocks 16 to pull back. The locking blocks 16 disengage from the slots on the lock beam 2, thus unlocking.

[0042] When the user forgets the password, key 3 is inserted into lock cylinder assembly 5 and rotated 90°. Lock cylinder assembly 5 drives angle rotating block 12 to rotate. Since angle rotating block 12 has an eccentric structure, its long end pushes code finding fixing block 6 to slide along limit post 14. At this time, the number wheel 8 is rotated, and the number wheel 8 drives the character wheel core 9 to rotate. When the character wheel core 9 rotates to the position where the code finding pin hole 27 corresponds to the code finding pin 22, the code finding pin 22 is inserted into the code finding pin hole 27 under the action of code finding pin spring 21. At this time, the password number corresponding to the number wheel 8 is found. Repeat the operation to find the password numbers corresponding to all number wheels 8.

[0043] When changing the password, use the included tool to insert into the corresponding slot. The spindle 10 drives the character wheel core 9 to disengage from the number wheel 8. At this time, the number on the number wheel 8 can be reset. After the password is changed, remove the tool, and the character wheel core 9 will re-engage with the number wheel 8 under the action of the spindle spring 19.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A U-shaped combination lock with a recoverable combination, comprising a lock body (1) and a lock beam (2), characterized in that, The lock body (1) has two parallel lock holes (13) on both sides. The lock body (1) has a locking mechanism in the middle that locks the lock beam (2) and the lock body (1) when the two ends of the lock beam (2) are inserted into the two lock holes (13). The locking mechanism includes a spindle (10). The two ends of the spindle (10) are fitted with spindle springs (19). The middle of the spindle (10) is fitted with a number wheel core (9). Multiple number wheels (8) are engaged on the number wheel core (9). The outer wheel surface of the number wheel (8) is exposed outside the lock body (1). The number wheel core (9) is provided with a groove (25) and a code finding pin hole (27). The lock body (1) is provided with a locking plate (11) corresponding to the locking mechanism. The locking plate (11) is provided with a protrusion (24). One end of the locking plate (11) is provided with a locking protrusion (23). The top of the lock body (1) is symmetrically provided with two limiting posts (14). The two limiting posts (14) are slidably limited to the two ends of the code finding fixing block (6). A mounting plate (20) is installed on one side of the code finding fixing block (6) by bolts. A code finding needle spring (21) is installed on the side of the mounting plate (20) inside the code finding fixing block (6). A code finding needle (22) is fixedly installed on one end of the code finding needle spring (21). Two return springs (15) are installed on the side of the code finding fixing block (6) corresponding to the spindle (10). A lock cylinder assembly (5) is also installed on the top of the lock body (1). An angle rotating block (12) is provided on the lock cylinder assembly (5). Two locking blocks (16) are symmetrically arranged at the bottom of the lock body (1). One end of the locking block spring (7) is fixed at the opposite end of the two locking blocks (16). The other end of the locking block spring (7) is fixedly connected to the stop block (18) provided in the lock body (1). The two locking blocks (16) are provided with a mating part (17) at the close end. A button (4) is also provided at the bottom of the lock body (1) and protrudes outside the lock body (1).

2. The U-shaped combination lock with recoverable password as described in claim 1, characterized in that: The angle rotating block (12) has an eccentric structure, and the long end of the angle rotating block (12) can push the code finding fixing block (6) to slide relative to the limiting post (14).

3. A U-shaped combination lock with a recoverable password as described in claim 1, characterized in that: The code-finding pin (22) is set in correspondence with the code-finding pin hole (27), and when the code-finding pin (22) is inserted into the code-finding pin hole (27), the locking mechanism is in the unlocked state.

4. A U-shaped combination lock with a recoverable password as described in claim 1, characterized in that: The protrusion (24) is correspondingly set with the groove (25), and the locking mechanism is in the unlocked state when the protrusion (24) enters the groove (25).

5. A U-shaped combination lock with a recoverable password according to claim 1, characterized in that: The locking block (16) has a relief groove (28) at one end near the locking protrusion (23), and the relief groove (28) is correspondingly provided to the locking protrusion (23).

6. A U-shaped combination lock with a recoverable password according to claim 1, characterized in that: A working spring (26) is provided between the locking plate (11) and the lock body (1).

7. A U-shaped combination lock with a recoverable password according to claim 1, characterized in that: A key (3) is inserted into the lock cylinder assembly (5).

8. A U-shaped combination lock with a recoverable password according to claim 1, characterized in that: The mating part (17) abuts against the button (4), and the locking beam (2) has a U-shaped structure.

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