A combination lock having a password recovery mechanism

Abstract

The utility model relates to password lock technology field discloses a password lock with password finding back mechanism, including casing, password mechanism, locking mechanism and decoding mechanism, password mechanism includes a plurality of dials and the dial wheel, and the inside of dial wheel is equipped with the ring with the opening, and the outside of dial wheel is equipped with the clamping block and the clamping groove cooperation of dial, locking mechanism includes the lock hook, and the lock hook includes the first straight line section, and the first straight line section is equipped with the locking protrusion in side surface, and the locking protrusion and the ring opening of dial wheel correspond with dial wheel and realize locking, and decoding mechanism includes lock core, sleeve and seek code module, and sleeve lower extreme is connected with lock core through transmission protrusion, and sleeve upper end and lock hook sleeve sleeve joint, and seek code module includes movable block and seek code lever, and dial wheel side face is opened and has seek code slot, and seek code lever one end corresponds with seek code slot, and sleeve side face is equipped with push protrusion, and rotates lock core, and push protrusion drives movable block to remove, and seek code lever inserts the seek code slot positioning correct password of dial wheel. Find the password through password finding back mechanism key.

Description

Technical Field

[0001] This utility model relates to the field of combination lock technology, specifically a combination lock with a combination retrieval mechanism. Background Technology

[0002] Mechanical combination locks are widely used in our lives, such as in common luggage lockers and cabinets. They eliminate the inconvenience of carrying physical keys and avoid the problems of forgetting or losing them; only the combination code is needed to open the lock. They are also very manpower-efficient in company management, as each employee is equipped with their own combination lock, making them popular. However, forgetting the combination code requires damaging the lock, causing inconvenience. Furthermore, they can also cause inconvenience in communal living and working environments. For example, each employee has a locker, which they typically use with a mechanical combination lock to store their belongings. If an employee leaves or is unable to access the lock for other reasons, management might damage the lock to open the lock, resulting in financial loss.

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a combination lock with a password retrieval function, making lock management and use more convenient. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a combination lock with a password retrieval mechanism. The lock includes a housing, a password mechanism, a locking mechanism, and a decoding mechanism. The password mechanism comprises several character wheels and a code-matching wheel. The inner side of each code-matching wheel has an open ring, and the outer side of each code-matching wheel has a locking block that engages with a groove on one of the character wheels. The locking mechanism includes a locking hook with a first straight segment and a locking protrusion on its side. The locking protrusion engages with the opening of the ring on the code-matching wheel to achieve locking. The decoding mechanism includes a lock cylinder, a sleeve, and a code-finding module. The lower end of the sleeve is connected to the lock cylinder via a transmission protrusion, and the upper end of the sleeve is sleeved with the locking hook. The code-finding module includes a movable block and a code-finding rod. The code-matching wheel has a code-finding groove on its side, and one end of the code-finding rod corresponds to the groove. The sleeve has a pushing protrusion on its side. Rotating the lock cylinder causes the pushing protrusion to drive the movable block to move, allowing the code-finding rod to insert into the code-finding groove of the code-matching wheel to locate the correct password.

[0005] Preferably, the movable block and the code-finding rod are integrally formed, the code-finding rod is provided with a U-shaped elastic structure, one end of the code-finding rod is fixed to the movable block, and the other end of the code-finding rod is correspondingly set with the code-finding slot.

[0006] Preferably, the cryptographic mechanism further includes a spring, which elastically abuts against the character wheel, causing positioning feedback when the character wheel rotates.

[0007] Preferably, the locking hook further includes a bent section and a second straight section, wherein the first straight section, the bent section and the second straight section are integrally formed, and the locking protrusions are evenly distributed in a straight line on the first straight section.

[0008] Preferably, the first straight segment of the locking hook is provided with a locking block, and the housing is provided with a limiting block and a limiting groove. The locking block moves along the limiting groove and cooperates with the limiting block to limit the displacement range of the locking hook.

[0009] Preferably, the bottom of the housing is provided with a coding spring, the upper end of which abuts against the lowest coding wheel to reset the coding wheel.

[0010] Preferably, the movable block has a return spring on the left side and a movable groove on the right side that cooperates with the pushing protrusion. When the pushing protrusion pushes the movable block, it compresses the return spring.

[0011] Preferably, the locking hook sleeve is engaged with the mounting groove of the housing by means of an installation protrusion, and the upper end of the locking hook sleeve is provided with a sleeve hole for limiting the second straight segment of the locking hook.

[0012] Preferably, the sleeve and the lock cylinder are connected by a transmission protrusion and a connecting groove, and the two sets of transmission protrusions are symmetrically arranged.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a password retrieval mechanism, the password locking mechanism is combined with the mechanical keyhole, and the operator can unlock directly by password, or retrieve the password by key body if the password is forgotten, which is convenient to operate; the drive code-finding rod and the movable block are integrally formed, and the U-shaped structure is flexibly set, which is simple in structure, easy to assemble the lock body, and improves production efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of this utility model. For those skilled in the art, other embodiments and their accompanying drawings can be obtained from the embodiments shown in these drawings without creative effort.

[0015] Figure 1 This is an exploded view of the components of a combination lock with a password retrieval mechanism according to this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of a combination lock with a password retrieval mechanism according to this utility model.

[0017] Figure 3 This is a structural diagram of a combination lock with a password retrieval mechanism without the outer shell.

[0018] Figure 4 This is a schematic diagram of the internal structure of a combination lock with a password retrieval mechanism according to this utility model.

[0019] Figure 5 This is a schematic diagram of a lock cylinder-less structure of a combination lock with a password retrieval mechanism according to this utility model.

[0020] Figure 6 This is a schematic diagram of the unlocking structure of a combination lock with a password retrieval mechanism according to the present invention.

[0021] Figure 7 This is a schematic diagram of the password mechanism of a combination lock with a password retrieval mechanism according to this utility model.

[0022] Figure 8 This is a schematic diagram of the decoding mechanism of a combination lock with a password retrieval mechanism according to this utility model.

[0023] Figure 9 This is a schematic diagram of the lock hook structure of a combination lock with a password retrieval mechanism according to this utility model.

[0024] In the diagram: 1. Housing; 11. Front shell; 12. Bottom shell; 13. Connecting post; 14. Insertion hole; 2. Number wheel; 21. Adjusting wheel; 23. Ring; 24. Code-finding groove; 3. Spring; 31. Fixing piece; 32. Pressure piece; 4. First straight section; 41. Bending section; 411. Locking protrusion; 42. Second straight section; 5. Lock hook sleeve; 6. Locking block; 61. Limiting block; 62. Limiting hole; 63. Limiting groove; 7. Adjusting spring; 71. Limiting piece; 8. Lock cylinder; 81. Sleeve; 82. Connecting groove; 83. Transmission protrusion; 84. Pushing protrusion; 9. Movable block; 91. Code-finding rod; 92. Sliding block; 93. Return spring. Detailed Implementation

[0025] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments described in this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] An embodiment of this utility model provides a combination lock with a password retrieval mechanism, such as... Figures 1 to 9 As shown, the device includes a housing 1, a password mechanism, a locking mechanism, and a decoding mechanism. The housing 1 includes a front shell 11 and a bottom shell 12 that cooperate with each other. The bottom shell 12 has a protruding connecting post 13, and the front shell 11 has a socket 14 that mates with the connecting post 13. The connecting post 13 is inserted into the socket 14 and engaged. The engagement of the connecting post 13 and the socket 14 fixes the bottom shell 12 and the front shell 11 together.

[0027] The cryptographic mechanism is located on the left side of the bottom shell 12, and the locking mechanism is located on the upper end of the bottom shell 12. The cryptographic mechanism includes a set of character wheels 2 consisting of multiple character wheels 2 and a set of adjustment wheels 21 consisting of multiple adjustment wheels 21 that cooperate with the character wheels 2.

[0028] The cryptographic mechanism further includes a spring 3 and a fixing plate 31. The fixing end of the spring 3 is fixedly disposed between the elastic end of the spring 3 on the housing 1, the character wheel 2, and the bottom shell 12. Specifically, the spring 3 elastically abuts against the character wheel 2. When the character wheel 2 rotates, when the spring 3 passes through the groove of the character wheel 2, it generates vibration feedback, making the rotation angle of the stopping position of the character wheel 2 clearer and more precise. A pressure plate 32 is provided below the fixing plate 31. Both the fixing plate 31 and the pressure plate 32 have multiple matching circular holes. The middle part of the face shell 11 has multiple fixing posts that match the circular holes, and the fixing posts are inserted into the circular holes.

[0029] The locking mechanism further includes a locking hook, which is integrally formed in three sections. The locking hook includes a first straight section 4, a bent section 41, and a second straight section 42. The first straight section 4 and the second straight section 42 are arranged parallel to each other. The two ends of the bent section 41 are respectively connected to the upper ends of the first straight section 4 and the upper ends of the second straight section 42. The side of the first straight section 4 is provided with locking protrusions 411, the same number as the number of adjustment wheels 21. The locking protrusions 411 are evenly arranged in a straight line on the first straight section 4. The dialing wheel 21 includes a circular ring 23 post, and the circular ring 23 post has an opening. The opening of the circular ring 23 cooperates with the locking protrusion 411, so that the circular ring 23 cooperates with the first straight segment 4. The lower end of the first straight segment 4 is fitted into the circular ring 23. The lower end of the outer side of the circular ring 23 post is provided with a locking block 6. The inner side of the dial wheel 2 is provided with a locking groove that cooperates with the locking block 6. The dial wheel 2 is fitted into the lower end of the circular ring 23 post.

[0030] The locking mechanism further includes a locking hook sleeve 5, and the upper part of the bottom shell 12 is provided with a locking hook sleeve 5 hole for installing the locking hook sleeve 5. The lower part of the locking hook sleeve 5 is provided with a mounting protrusion. The two sets of mounting protrusions are symmetrically arranged and respectively engage with the mounting slots provided on the inner walls of the front shell 11 and the bottom shell 12.

[0031] The bottom shell 12 has a through hole in the middle of the left side that mates with the character wheel 2, and a dialing hole for mounting the dialing wheel 21. The bottom shell 12 has a lower insertion hole 14 on the top for inserting the first straight segment 4.

[0032] The faceplate 11 has a through hole in the middle of the left side for the rotation of the character wheel 2. The faceplate 11 has an upper insertion hole 14 on the upper left side. The upper insertion hole 14 and the lower insertion hole 14 cooperate to form an insertion hole 14 for the insertion of the first straight segment 4.

[0033] It also includes an activity restriction mechanism, which is provided with a locking block 6, a limiting block 61, a limiting hole 62, and a limiting groove 63. The side of the first straight segment 4 has a protruding locking block 6, and the locking block 6 is located above the locking protrusion 411. The bottom shell 12 has a limiting hole 62, and a limiting block 61 is provided in the limiting hole 62. When the lower end face of the locking block 6 contacts the limiting block 61, the lower end face of the second straight segment 42 is located above the shell 1. The side of the lower insertion hole 14 of the bottom shell 12 has a limiting groove 63 for the movement of the locking block 6. When the locking block 6 moves to the upper bottom end of the limiting groove 63, the locking protrusions 411 on the side of the first straight segment 4 are all located within the annulus 23 of the adjusting wheel 21 corresponding to the locking protrusion 411, and the lower end of the second straight segment 42 moves out of the hook lock sleeve. The aforementioned activity limiting mechanism restricts the movement distance of the lock hook during unlocking, confining the lock hook to a short distance within the housing 1 to prevent the lock hook from detaching from the housing 1.

[0034] The housing 1 has a bottom hole at its lower left, and a coding spring 7 is installed inside the bottom hole. One end of the coding spring 7 abuts against the bottommost coding wheel 21, and the other end of the coding spring 7 abuts against the inner wall of the housing 1 at the lower end of the bottom hole. Preferably, a limiting piece 71 is also provided between the coding spring 7 and the bottommost coding wheel 21. The limiting piece 71 abuts against the coding spring 7.

[0035] The decoding mechanism includes a lock cylinder 8, a sleeve 81, and a code-finding module. A lock cylinder 8 cavity and a lock hole are symmetrically provided on the lower right side of the face shell 11, corresponding to the bottom shell 12, for mounting the lock cylinder 8. The lock cylinder 8 is disposed within the lock cylinder 8 cavity. A sleeve 81 cavity is provided on the lower right side of the face shell 11, corresponding to the bottom shell 12, for mounting the sleeve 81. The sleeve 81 cavity is located above the lock cylinder 8 cavity. The sleeve 81 is disposed within the sleeve 81 cavity, and its lower end is connected to the lock cylinder 8. The sleeve 81 is rotatably engaged with the lock cylinder 8, and rotation is driven by the transmission protrusion 83. A connecting body is provided at the lower end of the sleeve 81, and a connecting groove 82 is formed at the lower end of the connecting body. A transmission protrusion 83, offset from the axis of the lock cylinder 8, is provided at the upper end of the lock cylinder 8. The transmission protrusion 83 is correspondingly positioned and inserted into the connecting groove 82. There are two transmission protrusions 83 and two connecting grooves 82, and the two transmission protrusions 83 are symmetrically arranged about the lock cylinder 8.

[0036] The upper end of the sleeve 81 is an open end, the lower end of the locking hook sleeve 5 is sleeved with the sleeve 81, the upper end of the locking hook sleeve 5 extends out of the bottom shell 12, and the upper end of the locking hook sleeve 5 is provided with a sleeve hole for limiting the lower end of the second straight segment 42, the second straight segment 42 is located above the bottom shell 12.

[0037] The code-finding module is located in the middle of the housing 1, and includes a movable block 9 and a code-finding rod 91. A code-finding groove 24 is formed at the upper end of the side of the code-adjusting wheel 21. When the locking protrusion 411 on the side of the locking hook engages with the opening of the ring 23 on the inner side of the code-adjusting wheel 21, the code-finding groove 24 faces to the right. One end of the code-finding rod 91 on the left side of the movable block 9 has a U-shaped structure, and the code-finding rod 91 is fixedly connected to the movable block 9 through the U-shaped structure. The U-shaped structure has a certain degree of elasticity, saves space, and achieves integrated design of the code-finding rod 91 and the movable block 9, resulting in higher strength and fewer assembly steps.

[0038] One end of the code-finding rod 91 corresponds to the code-finding slot 24. A code-finding module hole is provided in the middle of the bottom shell 12, and a return spring 93 is provided on the left side of the code-finding module hole. One end of the return spring 93 abuts against the left end face of the code-finding module hole, and the other end of the return spring 93 abuts against the rear end of the left side of the movable block 9.

[0039] The sleeve 81 has a push protrusion 84 on its side. When the sleeve 81 is rotated to the unlocked state, the push protrusion 84 is located on the left side of the sleeve 81.

[0040] The upper right side of the code-setting hole is provided with multiple through holes that cooperate with the code-finding rod 91.

[0041] The movable block 9 has a sliding block 92 on its right side, and the bottom shell 12 has a sliding groove in the middle of its right side that mates with the sliding block 92. The sliding block 92 has a movable groove in the middle that mates with the pushing protrusion 84.

[0042] The movable block 9 moves along a fixed path under the thrust of the pushing protrusion 84; specifically, the sliding block 92 moves to the left along the sliding groove. The vertical length of the sliding groove is the same as the vertical length of the pushing protrusion 84, facilitating contact between the pushing protrusion 84 and the movable block 9.

[0043] The lower left side of the movable block 9 is provided with a positioning post that cooperates with the return spring 93, and the return spring 93 is sleeved on the positioning post. This prevents the return spring 93 from shifting position due to device shaking, thus affecting the reset effect of the movable block 9.

[0044] Operation Process: The password setting process of the lock disclosed in this embodiment is as follows: First, the password is correctly modulated. Then, the lock hook is moved upward until the locking protrusion 411 on the side of the first straight segment 4 of the lock hook is above the opening ring 23 on the inner side of the corresponding dialing wheel 21. The lock hook is rotated at one angle and then pressed downward. The locking protrusion 411 on the side of the lock hook moves downward and contacts the ring 23 on the inner side of the dialing wheel 21, causing the dialing wheel 21 to move downward. This causes the locking block 6 on the outer side of the dialing wheel 21 to disengage from the slot of the dialing wheel 21, that is, the number wheel 2 is located at the upper end of the dialing wheel 21. At this time, the number wheel 2 can be rotated to modulate the password.

[0045] After adjustment, release the lock hook. The dial wheel 21 moves upward under the elastic force of the dial spring 7 to reset, simultaneously moving the lock hook upward. After the dial wheel 21 moves upward, its locking body engages with the slot of the dial wheel 2. Next, rotate the lock hook to the unlock position and press it downward, so that the locking protrusion 411 on the side of the first straight segment 4 of the lock hook is below the corresponding ring 23 of the opening of the dial wheel 21, while the lower end face of the second straight segment 42 of the lock hook enters the lock hook sleeve 5. Flip the dial wheel 2 to scramble the code. The dial wheel 2 drives the dial wheel 21 to rotate, so that at least one locking protrusion 411 on the side of the first straight segment 4 of the lock hook does not correspond to the corresponding ring 23 of the opening of the dial wheel 21. At this time, the lock hook is locked in the dial wheel 21 and cannot move, thus completing the locking.

[0046] This embodiment discloses the password unlocking process of the lock. When the invention is in the locked state, the password is first correctly modulated. When the dial wheel 2 rotates, it will drive the dial wheel 21 to rotate. When the password is correctly modulated, the openings of the rings 23 on the inner side of all the dial wheels 21 are linearly distributed and cooperate with the locking protrusion 411 of the first straight segment 4 of the lock hook. That is, at this time, lifting the lock hook upwards can move the lock hook upwards until it is removed from the housing 1, thus realizing the unlocking function.

[0047] When the password is forgotten, it can be retrieved by unlocking the lock with a key. This embodiment discloses the password retrieval process for the lock. In the locked state, the key that can be used to unlock is first inserted into the keyhole of the lock cylinder 8 and rotated. The lock cylinder 8 drives the sleeve 81 to rotate. When the sleeve 81 rotates until the pushing protrusion 84 is located on the left side of the sleeve 81, the sleeve 81 gradually pushes the movable block 9 to the left. After the movable block 9 moves to the left, the code-finding rod 91 in the mounting hole of the movable block 9 moves to the left. At this time, if the code-finding lever 91 is directly inserted into the corresponding code-finding slot 24, the code-adjusting wheel 21 corresponding to the code-finding lever 91 is exactly in the unlocked position, that is, the character wheel 2 corresponding to the current code-adjusting wheel 21 is correct, and the character currently located in the password position is the password character; if the code-finding lever 91 is not inserted into the corresponding code-finding slot 24, the code-adjusting wheel 21 is still in a free-rotating state, and the character wheel 2 is not restricted, further transferring the character wheel 2 and driving the code-adjusting wheel 21 to rotate, until the code-finding lever 91 is inserted into the corresponding code-finding slot 24 under elastic thrust; when the code-finding lever 91 is inserted into the code-finding slot 24 one by one, the character wheels 2 are all in a limited state and cannot rotate further, the password mechanism is in the password retrieval state, and the content on the character wheel 2 is the correct password content, completing the password retrieval operation.

[0048] After the password retrieval operation is completed, the key is rotated to reset, causing the pushing protrusion 84 to move away from the left side of the sleeve 81. The movable block 9 moves to the right under the action of the reset spring 93, and the code-finding rod 91 moves away from the code-finding slot 24. By cleverly combining the password and physical key, the decoding mechanism retrieves the set password via the key, avoiding problems caused by forgetting the password or the absence of the person who knows the password, thus facilitating management.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. The scope of this invention is defined by the appended claims, not by the foregoing description, and is therefore intended to encompass all variations falling within the meaning and scope of equivalents of the claims. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combination lock with a password retrieval mechanism, comprising a housing (1), a password mechanism, a locking mechanism, and a decoding mechanism, characterized in that: The cryptographic mechanism includes several character wheels (2) and a code wheel (21). The inner side of the code wheel (21) is provided with an open ring (23), and the outer side of the code wheel (21) is provided with a locking block (6) that cooperates with the locking groove of the character wheel (2). The locking mechanism includes a locking hook, which includes a first straight segment (4). The first straight segment (4) has a locking protrusion (411) on its side. The locking protrusion (411) and the opening of the ring (23) of the adjustment wheel (21) are correspondingly engaged to achieve locking. The decoding mechanism includes a lock cylinder (8), a sleeve (81), and a code-finding module. The lower end of the sleeve (81) is connected to the lock cylinder (8) via a transmission protrusion (83), and the upper end of the sleeve (81) is sleeved with a lock hook sleeve (5). The code-finding module includes a movable block (9) and a code-finding rod (91). The code-adjusting wheel (21) has a code-finding groove (24) on its side. One end of the code-finding rod (91) corresponds to the code-finding groove (24). The sleeve (81) has a pushing protrusion (84) on its side. When the lock cylinder (8) is rotated, the pushing protrusion (84) drives the movable block (9) to move, so that the code-finding rod (91) is inserted into the code-finding groove (24) of the code-adjusting wheel (21) to locate the correct code.

2. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The movable block (9) and the code-finding rod (91) are integrally set together. The code-finding rod (91) is provided with a U-shaped elastic structure. One end of the code-finding rod (91) is fixed to the movable block (9), and the other end of the code-finding rod (91) is correspondingly set with the code-finding slot (24).

3. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The cryptographic mechanism also includes a spring (3), which elastically abuts against the character wheel (2) to generate positioning feedback when the character wheel (2) rotates.

4. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The locking hook also includes a bent section (41) and a second straight section (42). The first straight section (4), the bent section (41) and the second straight section are integrally formed. The locking protrusion (411) is evenly distributed in a straight line on the first straight section (4).

5. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The first straight segment (4) of the lock hook is provided with a locking block (6), and the housing (1) is provided with a limiting block (61) and a limiting groove (63). The locking block (6) moves along the limiting groove (63) and cooperates with the limiting block (61) to limit the displacement range of the lock hook.

6. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The bottom of the housing (1) is provided with a code spring (7), the upper end of which abuts against the lowermost code wheel (21) to reset the code wheel (21).

7. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The movable block (9) is provided with a reset spring (93) on the left side and a movable groove that cooperates with the push protrusion (84) on the right side. When the push protrusion (84) pushes the movable block (9), it compresses the reset spring (93).

8. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The locking hook sleeve (5) is engaged with the mounting groove of the housing (1) by means of a mounting protrusion. The upper end of the locking hook sleeve (5) is provided with a sleeve hole for limiting the second straight section (42) of the locking hook.

9. The combination lock with a password retrieval mechanism according to claim 1, characterized in that: The sleeve (81) and the lock cylinder (8) are connected by a transmission protrusion (83) and a connecting groove (82), and the two sets of transmission protrusions (83) are symmetrically arranged.

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