Mechanical combination lock password recovery mechanism and combination lock

Abstract

The present application provides a kind of mechanical combination lock password recovery mechanism, including combination wheel assembly and movable plate movably connected in lock body, movable plate has normal state and push state, the tumblers of combination wheel assembly are equipped with the blocking portion rotating with tumblers, the blocking portion on each tumblers is consistent with the position of unlocking portion, movable plate is equipped with the stop lever extending to the blocking portion of tumbler, wherein movable plate is in push state, stop lever moves to the range of motion trail of blocking portion to block tumbler from continuing to rotate;Movable plate is in normal state, stop lever is out of the range of motion trail of blocking portion to make tumbler can rotate normally, when all tumblers rotate in the same direction to the state of blocking portion abutting stop lever, unlocking portion of tumbler is matched with unlocking portion of lock piece to unlock.The password recovery structure is low in cost, simple in structure and easy to install.

Description

Technical Field

[0001] The invention belongs to the technical field of locks, in particular to a mechanical password lock. Background Art

[0002] The password of a mechanical combination lock may be forgotten after being used for a long time. The latest password retrieval mechanism on the market, such as the one disclosed in publication number CN104727639A, has a complex structure and requires multiple top cores to be set on the movable plate, resulting in high production costs and reduced assembly efficiency. In addition, the password retrieval mechanism of the combination lock cannot directly unlock the lock when retrieving the password. The key needs to be inserted, twisted, and dialed until the correct password is retrieved before the lock can be unlocked. This is time-consuming and particularly inconvenient in emergency situations. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to design a password retrieval structure with a simple structure.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] When the unlocking portion of all the wheel cores cooperates with the unlocking portion of the lock plate, the lock plate is in the unlocked state. The wheel core of the password wheel assembly is provided with a blocking portion that rotates together with the wheel core, and the blocking portion on each wheel core is in the same position as the unlocking portion. The movable plate is provided with a blocking rod extending toward the blocking portion of the wheel core, wherein when the movable plate is in the pushing state, the blocking rod moves into the motion track range of the blocking portion to block the wheel core from continuing to rotate; when the movable plate is in the normal state, the blocking rod disengages from the motion track range of the blocking portion to enable the wheel core to rotate normally. When all the wheel cores rotate in the same direction until the blocking portion abuts the blocking rod, the unlocking portion of the wheel core matches the unlocking portion of the lock plate and is unlocked.

[0006] Preferably, it also includes a driving mechanism for driving the movable plate to move, the driving mechanism includes a lock core assembly, and the lock core assembly is provided with a driving structure for driving the movable plate to move toward the password wheel assembly. The movable plate is driven by the lock core assembly to realize the switching of the movable plate between the normal state and the pushing state.

[0007] Preferably, the lock core assembly is provided with a top sleeve that rotates with the output end of the lock core assembly, and the top sleeve is provided with a top protrusion that pushes the movable plate. When a matching key is inserted into the lock core assembly and the key is turned to drive the top sleeve to rotate, the top protrusion pushes the movable plate toward the direction of the password wheel assembly.

[0008] Preferably, the top protrusion is a section of protrusion provided along the outer surface of the top sleeve, and the thickness of the protrusion gradually increases from the head to the tail to form a slope.

[0009] Preferably, it further includes a reset member for pushing the movable plate to reset. When the lock core assembly drives the top sleeve to rotate in the opposite direction, the reset member pushes the movable plate to reset to the range of the movement trajectory of the gear lever to separate from the blocking portion.

[0010] Preferably, the reset member is a spring, one end of the spring abuts against the movable plate, and the other end abuts against the combination lock housing.

[0011] Preferably, the unlocking portion on the character wheel core is a recessed portion provided on the outer peripheral surface of the character wheel core, and the unlocking portion on the locking plate is a latching protrusion provided on the surface of the locking plate facing the character wheel core and corresponding to the recessed portion of the character wheel core respectively. When all the character wheel cores are rotated until the recessed portion is aligned with the latching protrusion of the locking plate, the locking plate is in an unlocked state; when one of the character wheel cores does not correspond to the latching protrusion, the locking plate is in a locked state.

[0012] In order to achieve the unlocking function when retrieving the password, a password lock equipped with the password retrieval mechanism is provided. The password lock also includes a lock pin, and the lock plate has an extension portion extending to the tail of the lock pin. The extension portion moves with the lock plate, and is characterized in that: the lock plate extends to the bottom of the top protrusion near one end of the lock core assembly, and the bottom surface of the top protrusion has a height difference. When the top protrusion rotates with the lock core assembly, the bottom surface of the top protrusion presses the lock plate so that the extension portion of the lock plate is tilted to unlock.

[0013] Preferably, the top protrusion is spirally arranged on the outer peripheral surface of the top sleeve.

[0014] Preferably, the top protrusion and the top sleeve are of an integrated structure, there are two locking pins, which are arranged back to back, and a spring is provided between the two locking pins.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a blocking portion on the movable plate in coordination with the blocking portion on the character wheel core, and drives the blocking portion of the movable plate to be inserted into the movement trajectory of the blocking portion. When the code wheel is turned to drive the character wheel core to rotate, the code wheel and the character wheel core are restricted by the blocking portion and cannot rotate in this direction. At this time, the concave portion of the character wheel core is matched with the convex portion of the lock plate to achieve the purpose of retrieving the password. The password retrieval structure has low cost, simple structure and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0017] Figure 2 Schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the cipher wheel assembly from the bottom perspective;

[0019] Figure 4 It is a structural diagram of the movable plate;

[0020] Figure 5 Schematic diagram of the structure of the locking piece;

[0021] Figure 6 It is a structural diagram of the character wheel core;

[0022] Figure 7 It is a structural diagram of the top sleeve. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example

[0025] See also Figure 1-Figure 7, the figure shows a password lock, which includes a password lock housing 1, a lock plate 2, a lock pin 3, a password wheel assembly, a lock core assembly 4 and a movable plate 5. A top spring 8 is provided between the bottom of the lock plate and the password lock housing. The top spring 8 is used to always form an upward thrust on the lock plate, so that when the password lock is unlocked, the lock plate can automatically bounce up. The two ends of the lock plate are movably connected to the mounting plate, and the position of the top spring 8 is closer to one end of the lock pin than the position where the lock plate is connected to the mounting plate. There are two lock pins 3 and they are arranged in back to back. A spring 6 is provided between the two lock pins 3 to push the two lock pins 3 outward, so as to push the lock pin 3 to the notch of the lock rod 7 to lock the lock rod 7. The password wheel 11 assembly includes a core shaft 9, a character wheel core 10, and a password wheel 11 The word wheel core 10 is movably sleeved on the core shaft 9, and the password wheel 11 is sleeved on the word wheel core 10. The password wheel 11 can drive the word wheel core 10 to rotate together. A number of code words are provided on the outer surface of the password wheel 11. The password wheel 11 is engaged with the word wheel core 10 from the end side. When the word wheel core 10 is axially pushed, the password wheel 11 is disengaged from the word wheel core 10, and the password can be modified at that time. In order to accurately locate the position of the password wheel 11 when dialing the password wheel 11, a positioning groove is provided on the outer surface of the password wheel 11, and a spring piece 12 is provided in the lock body. The spring piece 12 is provided with a positioning portion that is elastically inserted into the positioning groove of each password wheel 11. In this way, the password wheel 11 and the word wheel core 10 can be accurately positioned when dialing the password wheel 11. The lock piece 2 has an extension 13 extending to the tail of the lock pin 3, and the extension 13 moves with the lock piece 2. Each character wheel core 10 is provided with a recessed portion 14, and the lock piece 2 is provided with a card protrusion 15 corresponding to the character wheel core 10. When all the character wheel cores 10 are rotated until the recessed portion 14 is aligned with the card protrusion 15 of the lock piece 2, the lock piece 2 is in the unlocked state. When one of the character wheel cores 10 does not correspond to the card protrusion 15, the lock piece 2 is in the locked state. It is worth noting that the character wheel core 10 of the password wheel assembly in this embodiment is provided with a blocking portion 16, and the blocking portion 16 on each character wheel core 10 is aligned with the unlocking state. The locking portion is positioned uniformly (i.e., all character wheel cores 10 have identical structures). A blocking rod 17 is provided on the movable plate 5, extending toward the blocking portion 16 of the character wheel core 10. When the movable plate 5 is in a pushing state, the blocking rod 17 moves into the range of the blocking portion 16's motion trajectory to prevent the character wheel core 10 from further rotation. When the movable plate 5 is in a normal state, the blocking rod 17 disengages from the range of the blocking portion 16's motion trajectory to allow the character wheel core 10 to rotate normally. When all character wheel cores 10 rotate in the same direction until the blocking portion 16 abuts the blocking rod 17, the unlocking portion of the character wheel core 10 mates with the unlocking portion of the locking plate 2 to unlock. The angle between the blocking portion 16 and the unlocking portion is controlled to a set angle so that when the character wheel core 10 rotates until the blocking portion 16 abuts the blocking rod 17, the recessed portion 14 of the character wheel core 10 aligns with the protruding portion 15 of the locking plate 2.

[0026] To drive the movable plate 5, this embodiment further includes a drive mechanism for driving the movable plate 5. The drive mechanism includes a lock core assembly 4, which is provided with a drive structure for driving the movable plate 5 toward the combination wheel 11 assembly. The lock core assembly 4 drives the movable plate 5 to switch between a normal state and a push state. In this embodiment, the lock core assembly 4 is provided with a top sleeve 18 that rotates with the output end of the lock core assembly 4. The top sleeve 18 is provided with a top protrusion 19 that pushes the movable plate 5. When a matching key is inserted into the lock core assembly 4 and the key is turned to rotate the top sleeve 18, the top protrusion 19 pushes the movable plate 5 toward the combination wheel 11 assembly. In this embodiment, the top sleeve is provided with a socket that matches the shape of the output shaft of the lock core assembly, forming a transmission. Turning the key will drive the top sleeve to rotate.

[0027] In order to simultaneously drive the lock plate 2 to unlock when the key is rotated, this embodiment extends the lock plate 2 near the end of the lock core assembly 4 to below the top protrusion 19. The bottom surface of the top protrusion 19 has a height difference. When the top protrusion 19 rotates with the lock core assembly 4, the bottom surface of the top protrusion 19 presses against the lock plate 2, causing the extension portion 13 of the lock plate 2 to tilt and unlock. In this embodiment, the position of the top spring 8 is used as a fulcrum to form a lever to tilt the lock plate extension portion 13. The top protrusion 19 is designed as a spiral structure. The top protrusion 19 is a section of protrusion provided along the outer surface of the top sleeve 18. The thickness of the protrusion gradually increases from the head to the tail to form a slope. The top protrusion 19 and the top sleeve 18 are an integrated structure.

[0028] In order to enable the movable plate 5 to be reset when the lock core assembly 4 is locked, this embodiment further includes a reset member 20 for pushing the movable plate 5 to reset. When the lock core assembly 4 drives the top sleeve 18 to rotate in the opposite direction, the reset member 20 pushes the movable plate 5 to reset to the range of the motion trajectory in which the shift lever is free from the blocking portion 16. The reset member 20 is a spring. In this embodiment, the end of the movable plate 5 away from the combination wheel 11 assembly is provided with a push ear 21 protruding to one side. The combination lock housing 1 is provided with a mounting post 22. The mounting post 22 is arranged on the combination lock housing 1 on the side of the push ear 21 close to the combination wheel 11 assembly. One end of the spring abuts the push ear 21 of the movable plate 5, and the other end abuts the mounting post 22 on the combination lock housing 1.

Claims

1. A combination retrieval mechanism for a mechanical combination lock, comprising a combination wheel assembly and a movable plate movably connected to a lock body, the movable plate having a normal state and a push state. The combination wheel assembly comprises a combination wheel, a combination wheel core, a core shaft, and a locking plate. The combination wheel core and the locking plate have mutually cooperating unlocking portions. When the unlocking portions of all combination wheel cores cooperate with the unlocking portion of the locking plate, the locking plate is in the unlocked state. The mechanism is characterized by: The character wheel core of the cipher wheel assembly is provided with a blocking portion that rotates together with the character wheel core, and the blocking portion and the unlocking portion on each character wheel core are in the same position. The movable plate is provided with a blocking rod extending toward the blocking portion of the character wheel core, wherein when the movable plate is in a pushing state, the blocking rod moves into the motion track range of the blocking portion to block the character wheel core from continuing to rotate; when the movable plate is in a normal state, the blocking rod is separated from the motion track range of the blocking portion to enable the character wheel core to rotate normally. When all the character wheel cores rotate in the same direction until the blocking portion abuts the blocking rod, the unlocking portion of the character wheel core matches the unlocking portion of the lock plate and is unlocked.

2. A mechanical combination lock password retrieval mechanism as claimed in claim 1, characterized in that: It also includes a driving mechanism for driving the movable plate to move, which includes a lock core assembly. The lock core assembly is provided with a driving structure for driving the movable plate to move toward the password wheel assembly. The movable plate is driven by the lock core assembly to achieve switching between the normal state and the pushing state of the movable plate.

3. A mechanical combination lock password retrieval mechanism as claimed in claim 2, characterized in that: The lock core assembly is provided with a top sleeve that rotates with the output end of the lock core assembly. The top sleeve is provided with a top protrusion that pushes the movable plate. When a matching key is inserted into the lock core assembly and the key is turned to drive the top sleeve to rotate, the top protrusion pushes the movable plate to move toward the password wheel assembly.

4. A mechanical combination lock password retrieval mechanism as claimed in claim 3, characterized in that: The top protrusion is a section of protrusion arranged along the outer surface of the top sleeve, and the thickness of the protrusion gradually increases from the head to the tail to form a slope.

5. A mechanical combination lock password retrieval mechanism as claimed in claim 2, characterized in that: It also includes a reset member for pushing the movable plate to reset. When the lock core assembly drives the top sleeve to rotate in the opposite direction, the reset member pushes the movable plate to reset to the range of the movement track where the gear lever is separated from the blocking portion.

6. A mechanical combination lock password retrieval mechanism as claimed in claim 5, characterized in that: The reset member is a spring, one end of the spring abuts against the moving plate, and the other end abuts against the combination lock housing.

7. A mechanical combination lock password retrieval mechanism as claimed in claim 1, characterized in that: The unlocking portion on the character wheel core is a recessed portion provided on the outer peripheral surface of the character wheel core, and the unlocking portion on the locking plate is a latching protrusion provided on the surface of the locking plate facing the character wheel core and corresponding to the recessed portions of the character wheel core respectively. When all the character wheel cores are rotated until the recessed portions are aligned with the latching protrusions of the locking plate, the locking plate is in an unlocked state; when one of the character wheel cores is not aligned with the latching protrusion, the locking plate is in a locked state.

8. A combination lock equipped with the password retrieval mechanism according to any one of claims 3 to 7, the combination lock further comprising a lock pin, the lock plate having an extension extending to the rear end of the lock pin, the extension moving with the lock plate, characterized in that: The locking plate extends to below the top protrusion near one end of the lock core assembly, and the bottom surface of the top protrusion has a height difference. When the top protrusion rotates with the lock core assembly, the bottom surface of the top protrusion presses the locking plate so that the extended part of the locking plate is tilted to unlock.

9. The combination lock according to claim 8, wherein: The top protrusion is spirally arranged on the outer peripheral surface of the top sleeve.

10. The combination lock according to claim 8, wherein: The top protrusion and the top sleeve are of an integrated structure, and there are two locking pins which are arranged in back-to-back directions, with a spring provided between the two locking pins.

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