A combination lock

Abstract

The present application relates to a kind of password lock, including shell, with inner cavity, and panel is equipped with lock cylinder hole and dial slot;Mechanical lock, including lock cylinder and lock shell by vane interlock, lock cylinder tail is connected with lock piece, and lock piece is located at the back of shell, and is locked with the door cabinet outside;Password lock, including dial group and the core shaft that is passed through in the center of dial group, and core shaft is driven by mechanical lock, can move along the axial direction;Zero reset mechanism, zero reset mechanism is located between the mechanical lock and password lock, is driven by mechanical lock, so that dial group on password lock is automatically zero reset;Locking assembly, locking position is equipped on mechanical lock, locking assembly is driven by password lock, can be connected with locking position to mechanical lock is locked.The beneficial effects of the present application are that: when unlocking mechanical lock, the dial group of password lock is driven to rotate, so that dial group returns to random code position or set initial position, ensure the security and privacy of password.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and more particularly to a combination lock. Background Technology

[0002] Currently, the main types of combination locks in use are mechanical and electronic. Mechanical combination locks are particularly popular due to their ease of use, ability to withstand harsh environments, wide applicability, and energy efficiency. However, most mechanical combination locks on the market display the correct combination after locking and unlocking, requiring manual clearing. If the user forgets to clear the code, it is easily recognized by others, potentially causing significant losses and offering poor security. Therefore, developing a mechanical combination lock that automatically clears the code after unlocking is of paramount importance.

[0003] Chinese invention patent CN211144035 discloses an automatic scrambled combination lock, which includes a panel, a dial assembly, a knob, and a mounting base. The knob is rotatably mounted between the panel and the mounting base. The dial assembly is installed inside the knob, with the dial and its secondary bushing engaged. This invention can automatically scramble the combination when locked, providing high security.

[0004] However, the scrambling program of this combination lock can only be activated when the knob is turned in the opposite direction to lock. When the lock is unlocked, the dial still displays the correct password, so the security is still insufficient. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, the present invention provides a combination lock.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] include,

[0008] The outer casing has an inner cavity, and the panel is provided with a lock cylinder hole and a dial groove;

[0009] A mechanical lock includes a lock cylinder and a lock housing that are interlocked by a blade, wherein a lock plate is connected to the tail of the lock cylinder and is located on the back of the housing, and is locked to an external door or cabinet;

[0010] A combination lock includes a set of digit wheels and a spindle passing through the center of the set of digit wheels, wherein the spindle is driven by the mechanical lock and is capable of moving along an axial direction;

[0011] It also includes,

[0012] A zeroing mechanism is located between the mechanical lock and the combination lock. It is driven by the mechanical lock to automatically return the dials on the combination lock to zero.

[0013] A locking assembly is located on the side of the character wheel assembly. The mechanical lock has a locking part. The locking assembly is driven by the combination lock and can be connected to the locking part to lock the mechanical lock.

[0014] The zeroing mechanism is located between the spindle and the character wheel assembly. The spindle is driven by a mechanical lock and moves toward the side away from the mechanical lock, and during the movement, it drives the character wheel assembly to rotate back to zero.

[0015] The spindle is provided with an end block that can be connected to a mechanical lock. When the mechanical lock rotates, it pushes the end block toward one side of the spindle, thereby causing the end block to push the spindle backward.

[0016] A further provision of the above technical solution is that: an arc-shaped surface is provided on the end block, and the arc-shaped surface matches the shape of the mechanical lock;

[0017] The mechanical lock is provided with a drive block, and the arc-shaped surface is provided with a drive groove that can accommodate the drive block; when the mechanical lock rotates, it drives the drive block to rotate, and pushes the end block linearly.

[0018] A further provision of the above technical solution is that the character wheel assembly includes at least a character wheel core sleeved on the spindle, the zeroing mechanism is a driving part provided on the spindle, and the character wheel core is provided with a cooperating part that cooperates with and is driven by the driving part.

[0019] A further configuration of the above technical solution is as follows: the driving part is a protrusion provided on the outer periphery of the spindle; the mating part is a guide wall provided on the inner wall of the character wheel core, and the end face of the guide wall facing the mechanical lock side is formed as a guide surface;

[0020] The bump contacts the guide surface and drives the guide surface.

[0021] A further provision of the above technical solution is that the head of the driving part is a pointed tip, the guide surface is two symmetrically arranged logarithmic spiral arc surfaces, and the guide wall is provided with a through groove at the junction of the two arc surfaces to accommodate the passage of the driving part.

[0022] A further setting of the above technical solution is: the locking assembly includes a lever driving component and a locking rod, wherein the first end of the lever driving component has a retracted and extended position relative to the number wheel assembly, thereby causing the second end to have a position away from and close to the lock housing;

[0023] When the second end approaches the lock housing, push the locking lever toward the lock housing to connect it with the locking part;

[0024] A locking block is provided at one end of the locking rod that is connected to the locking part, and the locking part is a locking groove.

[0025] A further provision of the above technical solution is that: the first end of the lever drive component is configured as a pawl, and the character wheel assembly is provided with a positive code groove that can accommodate the pawl to engage;

[0026] The second end is configured as a pushing part;

[0027] The lever drive component is also provided with a first torsion spring, the two torsion feet of the first torsion spring abutting against the push part and the outer shell respectively, so that the push part has a tendency to move away from the lock shell.

[0028] A further provision of the above technical solution is that: a stop bar is provided on the locking rod at one end of the locking block towards the lever driving component, and the pushing part on the lever driving component is located between the stop bar and the lock housing;

[0029] A second torsion spring is located at the other end of the locking rod.

[0030] A further provision of the above technical solution is that a spring post is provided on the other end of the locking rod, and the second torsion spring is sleeved on the spring post;

[0031] Furthermore, a stop block is provided on the locking rod on the same side as the second torsion spring, and the two torsion feet of the second torsion spring abut against the stop block and the inner wall of the outer casing, respectively.

[0032] A further provision of the above technical solution is that it also includes a spring stop assembly, the spring stop assembly including a spring stop claw, a movable plate for pushing the spring stop claw toward one side of the number wheel assembly, and a connecting shaft disposed on the mechanical lock;

[0033] When the mechanical lock rotates, the connecting shaft rotates accordingly. The connecting shaft drives the movable plate to move along the axis of the character wheel assembly, creating displacement between it and the spring stop pawl. This results in two positional states between the movable plate and the spring stop pawl: abutment and misalignment.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. A zero-return mechanism is set up so that when the mechanical lock is unlocked, the combination lock's dial group is driven to rotate, returning the dial group to the scrambled position or the preset initial position, ensuring the security and confidentiality of the password;

[0036] 2. Set the locking component separately and control the locking component through the number wheel assembly to ensure that the mechanical lock can be unlocked as long as the number wheel assembly is in the correct position;

[0037] 3. A new type of spring-loaded component is set up so that the digit wheel group will not bounce when automatically returning to zero, further ensuring the hidden zeroing of the digit wheel group. Attached Figure Description

[0038] Figure 1This is a schematic diagram of the exploded structure of the present invention.

[0039] Figure 2 This is a schematic diagram showing the position and structure of the spindle and lock housing.

[0040] Figure 3 This is a schematic diagram of the drive block structure on the lock housing.

[0041] Figure 4 This is a schematic diagram of the connection structure between the driver block and the end block.

[0042] Figure 5 This is a schematic diagram of the structure where the zero-return mechanism is separated.

[0043] Figure 6 This is a schematic diagram of the contact drive structure for the zero-return mechanism.

[0044] Figure 7 This is a schematic diagram showing the position and structure of the locking assembly, the dial assembly, and the mechanical lock in the locked state.

[0045] Figure 8 This is a schematic diagram showing the planar positions of the locking assembly, the dial assembly, and the mechanical lock in the locked state.

[0046] Figure 9 This is a schematic diagram showing the position and structure of the locking assembly, the dial assembly, and the mechanical lock from another angle when the lock is in the locked state.

[0047] Figure 10 This is a schematic diagram of the transmission structure of each component of the locking assembly.

[0048] Figure 11 This is a schematic diagram showing the position and structure of the locking assembly, the dial assembly, and the mechanical lock in the unlocked state.

[0049] Figure 12 This is a schematic diagram showing the planar positions of the locking components, the dial assembly, and the mechanical lock in the unlocked state.

[0050] Figure 13 This is a schematic diagram showing the position and structure of the locking assembly, the dial assembly, and the mechanical lock from another angle in the unlocked state.

[0051] Figure 14 This is a schematic diagram showing the position and structure of each component of the spring-loaded assembly.

[0052] Figure 15 This is a schematic diagram of the transmission structure between the spring stop assembly and the mechanical lock housing.

[0053] Figure 16 This is a schematic diagram showing the position and structure of the spring-loaded assembly, mechanical lock, and number wheel assembly in the spring-loaded state.

[0054] Figure 17This is a schematic diagram showing the planar positions of the spring stop assembly and the character wheel assembly when the claw and the character wheel are disengaged.

[0055] Figure 18 This is a schematic diagram of the linkage structure between the movable plate and the lever drive component.

[0056] Figure 19 This is a schematic diagram of the decomposed structure of the code-finding component.

[0057] Figure 20 This is a schematic diagram showing the positional structure of the code-finding component and the character wheel assembly.

[0058] Figure 21 This is a schematic diagram showing the separate structure of the code-finding knob and the code-finding plate.

[0059] The attached diagram is labeled: 100, outer casing; 101, lock cylinder hole; 102, dial groove;

[0060] 200. Mechanical lock; 210. Knob; 220. Lock housing; 221. Drive block; 222. Limit step; 223. Locking part;

[0061] 300. Combination lock; 310. Spindle; 311. End block; 311.1. Drive slot; 311.2. Notch; 320. Digit wheel core; 312. Drive part; 321. Mating part; 322. Through slot; 330. Return spring; 340. Core sleeve; 341. Correct code slot; 350. Digit wheel; 342. Code search slot;

[0062] 400. Locking assembly; 410. Lever drive component; 420. Locking rod; 421. Locking block; 411. Pawl; 412. Pushing part; 413. Rotating rod; 414. Linkage part; 430. First torsion spring; 440. Second torsion spring; 422. Abutment rod; 423. Spring column; 424. Abutment block; 450. Limiting seat;

[0063] 500, spring stop assembly; 510, spring stop claw; 511, curved plate; 512, claw part; 520, movable plate; 530, connecting shaft; 531, spring stop push block; 521, top block; 540, top holding spring; 522, push part; 523, sliding foot; 524, linkage push block;

[0064] 600. Code finding component; 610. Code finding lever; 620. Housing; 630. Code finding knob; 631. Propulsion surface; 640. Code finding plate; 641. Cover; 642. Base plate; 643. Protrusion; 644. Spring;

[0065] 1. Locking plate. Detailed Implementation

[0066] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0067] like Figure 1-21 As shown, this embodiment discloses a combination lock.

[0068] Specific reference Figure 1 As shown, including,

[0069] The outer casing 100 has an inner cavity and a lock cylinder hole 101 and a character wheel groove 102 on the panel;

[0070] The mechanical lock 200 includes a lock cylinder and a lock housing 220 that are interlocked by a blade. The lock cylinder is connected to a lock plate 1 at its tail, and the lock plate 1 is located on the back of the housing 100 and is locked to an external door cabinet.

[0071] The combination lock 300 includes a set of digit wheels and a spindle 310 passing through the center of the set of digit wheels. The spindle 310 is driven by the mechanical lock 200 and can move along the axial direction.

[0072] It also includes,

[0073] A zeroing mechanism is located between the mechanical lock 200 and the combination lock 300. It is driven by the mechanical lock 200 to automatically return the dial group on the combination lock 300 to zero.

[0074] The locking assembly 400 is located on the side of the digit wheel assembly. The mechanical lock 200 is provided with a locking part 223. The locking assembly 400 is driven by the combination lock 300 and can be connected to the locking part 223 to lock the mechanical lock 200.

[0075] The zeroing mechanism is located between the spindle 310 and the character wheel assembly. The spindle 310 is driven by the mechanical lock 200 and moves toward the side away from the mechanical lock 200. During the movement, it drives the character wheel assembly to rotate back to zero.

[0076] The spindle 310 is provided with an end block 311 that can be connected to the mechanical lock 200. When the mechanical lock 200 rotates, it pushes the end block 311 toward one side of the spindle 310, thereby causing the end block 311 to push the spindle 310 backward.

[0077] The above is the basic scheme of this embodiment.

[0078] In this embodiment, the unlocking of lock plate 1 has two methods:

[0079] One method is to move the dial to the correct position to unlock the combination lock 300. When the combination lock 300 is unlocked, it drives the locking component 400, causing the locking component 400 to disengage from the locking part 223. That is, the locking component 400 releases the mechanical lock 200. At this time, rotating the mechanical lock 200 causes the lock case 220 and the lock cylinder to rotate simultaneously, thereby causing the lock plate 1 at the tail of the lock cylinder to rotate and disengage from the door cabinet to unlock.

[0080] The second scenario is when the password is forgotten and the combination lock 300 cannot be unlocked. A key is inserted into the keyhole of the mechanical lock 200 to drive the blade, which releases the lock cylinder and the lock shell 220. At this time, rotating the lock cylinder will drive the blade at the tail of the lock cylinder to rotate and disengage from the door and unlock it.

[0081] The above two unlocking methods are commonly used in existing technologies.

[0082] When using the first method to unlock the device by dialing a combination, the dial on the combination lock 300 may still display the correct combination position when the mechanical lock 200 is unlocked. This could expose the combination and create a security vulnerability. Therefore, this embodiment includes a zeroing mechanism. The purpose of this mechanism is to rotate the dial of the combination lock 300 simultaneously with unlocking the mechanical lock 200, returning the dial to either a random position or a pre-set initial position, thus ensuring the security and confidentiality of the combination.

[0083] The specific implementation method for solving this problem in this embodiment is as follows: When the user unlocks the mechanical lock 200 by rotating the mechanical lock 200, the mechanical lock 200 drives the spindle 310 on the combination lock 300 through the drive end block 311. The spindle 310 moves toward the side away from the mechanical lock 200, and drives the number wheel group during the movement, so that the number wheel group rotates automatically, thereby scrambling the password displayed on the number wheel groove 102 and restoring it to the scrambled position or the initial position.

[0084] In this embodiment, in order to facilitate the operation of the mechanical lock 200, a knob 210 is connected to the lock cylinder. The user only needs to turn the knob 210 to rotate the lock cylinder.

[0085] (Mechanical lock drives the return-to-zero mechanism)

[0086] Since the mechanical lock 200 is usually unlocked by rotation, when the user turns the knob 210, it drives the lock cylinder or the lock cylinder and lock shell 220 to rotate together. The movement of the spindle 310 is linear, and the linear direction is perpendicular to the axis of the lock cylinder. In order to convert the rotational movement of the mechanical lock 200 into the linear movement of the spindle 310, the end block 311 is provided with an arc-shaped surface, which matches the shape of the mechanical lock 200.

[0087] The mechanical lock 200 is provided with a drive block 221, and the arc-shaped surface is provided with a drive groove 311.1 that can accommodate the drive block 221; when the mechanical lock 200 rotates, it drives the drive block 221 to rotate, and pushes the end block 311 linearly.

[0088] Specifically, refer to Figure 2 As shown, the end face of the end block 311 facing the mechanical lock 200 is set as an arc surface, which is configured to cooperate with at least a part of the outer peripheral surface of the mechanical lock 200. When the user operates the knob 210 to rotate the lock cylinder or the entire mechanical lock 200, the lock shell 220 rotates relative to the arc surface.

[0089] The drive block 221 is disposed on the outer peripheral surface of the lock housing 220 and is located on the side that contacts the arc-shaped surface, and is inserted into the drive groove 311.1; when the drive block 221 rotates with the lock housing 220, the drive block 221 contacts the groove wall of the drive groove 311.1 and applies force to it, pushing the end block 311 to move linearly.

[0090] Reference Figure 3 As shown, in order to prevent the drive block 221 from dislodging from the drive groove 311.1 during rotation, in this embodiment, the surface of the drive block 221 that contacts the groove wall of the drive groove 311.1 is set as an inclined surface. At the initial contact, the contact between the drive block 221 and the groove wall of the drive groove 311.1 is a line contact, and the direction of the driving force applied to the groove wall of the drive groove 311.1 is perpendicular to the inclined surface and outward. The component of the driving force is along the axis of the mechanical lock 200.

[0091] When the mechanical lock 200 is rotated to its position, the inclined surface on the drive block 221 rotates to a position where it is in close contact with the wall of the drive groove 311.1, and the drive block 221 is completely located within the drive groove 311.1. At this time, the force exerted by the drive unit on the wall of the drive groove 311.1 is perpendicular to the wall. At the same time, the reaction force of the wall of the drive groove 311.1 on the drive block 221 is also perpendicular to the inclined surface. This reaction force cannot cause the drive block 221 to move outward, ensuring that the drive block 221 is always within the drive groove 311.1.

[0092] Reference Figure 4 As shown, in this embodiment, a limiting step 222 is provided on the lower part of the drive block 221 extending in the reverse direction, and the end block 311 is provided with a notch 311.2 that cooperates with the limiting step 222; during the movement of the end block 311, the part of the end block 311 located near the drive groove 311.1 is always supported on the limiting step 222, which further ensures the stable connection between the drive block 221 and the drive groove 311.1.

[0093] (Return to zero action)

[0094] The combination lock 300 in this embodiment has the same structure as the combination lock 300 in the prior art, and has at least a character wheel core 320 and a character wheel 350 sleeved on the character wheel core 320. The character wheel 350 and the character wheel core 320 are connected in a limiting manner. When the character wheel 350 is turned, the character wheel core 320 also rotates together. The connection method between the character wheel core 320 and the character wheel 350 and the structure for changing the combination are the same as in the prior art, and will not be described in detail here.

[0095] In this embodiment, the specific implementation method of the zero-return mechanism is as follows:

[0096] The character wheel assembly includes at least a character wheel core 320 sleeved on the spindle 310, and the zeroing mechanism is a driving part 312 provided on the spindle 310. The character wheel core 320 is provided with a cooperating part 321 that cooperates with and is driven by the driving part 312.

[0097] When the spindle 310 moves away from the mechanical lock 200 under the action of the end block 311, the drive part 312 enters or goes deeper into the character wheel core 320. The mating part 321 is located in the inner ring of the character wheel core 320. At this time, the drive part 312 contacts the mating part 321 and applies force to the mating part 321, driving the character wheel core 320 to rotate, thereby causing the entire character wheel assembly to rotate.

[0098] Specific reference Figure 5 As shown, the driving part 312 is a protrusion provided on the outer periphery of the spindle 310; the mating part 321 is a guide wall provided on the inner wall of the character wheel core 320, and the end face of the guide wall facing the mechanical lock 200 is formed as a guide surface;

[0099] The bump 643 contacts the guide surface and drives the guide surface.

[0100] When the drive part 312 enters the interior of the character wheel core 320 and contacts the mating part 321 (guide wall) inside the character wheel core 320, it continues to push the core rod. The drive part 312 interferes with the mating part 321, and the drive part 312 generates a thrust on the mating part 321. The component of this thrust is at an angle to the central axis of the character wheel core 320, thus causing the character wheel core 320 to rotate.

[0101] Preferred, refer to Figure 6 As shown, the head of the driving part 312 is set as a pointed tip, the guide surface is two symmetrically arranged logarithmic spiral arc surfaces, and the guide wall is provided with a through groove 322 at the junction of the two arc surfaces, which can accommodate the passage of the driving part 312.

[0102] The head of the drive part 312 is set as a pointed tip, and the guide wall is arranged in the form of a logarithmic spiral. When the drive part 312 contacts the mating part 321, that is, the pointed tip contacts the arc-shaped guide wall. At this time, the component of the pushing force of the pointed tip on the arc-shaped guide wall is in the circumferential direction, so that the character wheel core 320 can rotate smoothly.

[0103] Compared to other guide walls, logarithmic spiral guide walls can generate a circumferential component of the received linear thrust, thereby maximizing the efficiency of the thrust component for rotation and reducing energy loss.

[0104] Other planar guide walls, when subjected to a linear pushing force, generate a component force perpendicular to the guide wall. Relative to the rotation of the character wheel core 320, only a small portion of this component force can be utilized, while a large amount of the pushing force is wasted.

[0105] When the character wheel group rotates to the scrambled position, that is, the driving part 312 and the through groove 322 are aligned, the spindle 310 continues to move and will pass through the through groove 322, and will no longer drive the mating part 321.

[0106] Similar to a conventional combination lock 300, a return spring 330 is provided at the tail of the spindle 310 to hold it in place. When the mechanical lock 200 rotates to reset, the spindle 310 moves toward the mechanical lock 200 under the action of the return spring 330, and at the same time the drive part 312 and the mating part 321 disengage.

[0107] (The combination lock locking the mechanical lock)

[0108] In a typical locking mechanism where the combination lock 300 locks the mechanical lock 200, the spindle 310 of the combination lock 300 is pressed against the locking part 223 of the mechanical lock 200 to achieve locking. However, when the engagement between the spindle 310 and the digit wheel assembly fails, the spindle 310 will become stuck and unable to retract. In this case, even if the combination lock 300 is in the unlocked state, the spindle 310 will not be able to unlock the mechanical lock 200.

[0109] In this embodiment, to avoid this situation, the locking component 400 is set separately, and the locking component 400 is controlled by the number wheel group to ensure that the mechanical lock 200 can be unlocked as long as the number wheel group is in the correct position.

[0110] The locking assembly 400 includes a lever drive component 410 and a locking rod 420. The first end of the lever drive component 410 has a retracted and extended position relative to the number wheel assembly, thereby causing the second end to have a position away from and close to the lock housing 220.

[0111] When the second end approaches the lock housing 220, push the locking rod 420 toward the lock housing 220 so that it connects with the locking part 223;

[0112] A locking block 421 is provided at one end of the locking rod 420 that is connected to the locking part 223, and the locking part 223 is a locking groove.

[0113] In this embodiment, a core sleeve 340 is provided between the character wheel core 320 and the character wheel 350. The core sleeve 340 is limitedly connected to the character wheel 350 and the character wheel core 320, and the core sleeve 340 is exposed axially outside the character wheel 350.

[0114] Reference Figures 7-9 As shown, in the scrambled state, the locking block 421 on the locking lever 420 is engaged in the locking part 223. At this time, when the knob 210 is turned, the mechanical lock 200 cannot be turned.

[0115] At the same time, in this state, the locking mechanism and the combination lock 300 are separated.

[0116] Reference Figure 10 As shown, the specific implementation of the driving structure of the locking component 400 in this embodiment is as follows: the first end of the lever driving component 410 is set as a pawl 411, and the number wheel group is provided with a positive code groove 341 that can accommodate the pawl 411 to be engaged.

[0117] The second end is configured as a pushing part 412;

[0118] The lever drive component 410 is also provided with a first torsion spring 430. The two torsion feet of the first torsion spring 430 abut against the push part 412 and the outer shell 100 respectively, so that the push part 412 has a tendency to move away from the lock shell 220.

[0119] The positive code slot 341 is located on the core sleeve 340; the pawl 411 and the push part 412 are arranged on the rotating rod 413 and are angled.

[0120] In the scrambled state, the correct code slot 341 and the pawl 411 are misaligned, that is, the pawl 411 is pushed out on the outer peripheral surface of the core sleeve 340. At this time, the push part 412 is located near the character wheel group, and the first torsion spring 430 is in a deformed state.

[0121] When the word wheel group is in the correct cipher, refer to Figure 11-13 As shown, the position of the positive code groove 341 corresponds to the position of the pawl 411. When the lever drive component 410 is not subjected to the top holding force, the torque of the first torsion spring 430 causes the lever drive component 410 to rotate, turning the pawl 411 into the positive code groove 341. At the same time, due to the lever action, the pushing part 412 moves outward, pushing the upper end of the locking rod 420 outward, thereby causing the locking block 421 to disengage from the locking groove.

[0122] In this embodiment, in order to enable the locking rod 420 to automatically reset, a stop rod 422 is provided on the locking rod 420 at one end of the locking block 421 towards the lever drive component 410, and the pushing part 412 on the lever drive component 410 is located between the stop rod 422 and the lock housing 220.

[0123] The second torsion spring 440 is disposed at the other end of the locking rod 420.

[0124] When the character wheel group returns to zero, the pawl 411 is pushed out of the positive code slot 341 again. At this time, the rotating rod 413 rotates against the torque of the first torsion spring 430, and the pushing part 412 moves to the side closer to the character wheel group and disengages from the locking rod 420.

[0125] When the locking rod 420 is not subjected to external force, the second torsion spring 440 resets and drives the locking rod 420 to rotate. At this time, the locking block 421 on the locking rod 420 rotates into the locking groove, automatically locking the mechanical lock 200.

[0126] In this embodiment, the specific implementation of the second torsion spring 440 driving the locking rod 420 is as follows: a spring post 423 is provided on the other end of the locking rod 420, and the second torsion spring 440 is sleeved on the spring post 423.

[0127] Furthermore, a stop block 424 is provided on the same side as the second torsion spring 440 on the locking rod 420, and the two torsion feet of the second torsion spring 440 respectively abut against the stop block 424 and the inner wall of the outer casing 100.

[0128] Specifically, the locking block 421 is located at the upper end of the locking rod 420, and the torsion foot of the second torsion spring 440 abuts against the outer end of the abutment block 424, having a pushing force to push the abutment block 424 inward; when the locking rod 420 is not subjected to external force, the locking block 421 can automatically move towards the side closer to the mechanical lock 200 to lock the mechanical lock 200.

[0129] In order to limit the locking mechanism, a limiting seat 450 is provided on the outside of the lock housing 220 in this embodiment. The limiting seat 450 is provided with a limiting groove that can accommodate the rotation of the spring column 423.

[0130] (Split mechanism)

[0131] This embodiment also includes a spring stop assembly 500, which is also driven by the mechanical lock 200. Specifically, the spring stop assembly 500 includes a spring stop claw 510, a movable plate 520 for pushing the spring stop claw 510 towards one side of the character wheel assembly, and a connecting shaft 530 disposed on the mechanical lock 200.

[0132] When the mechanical lock 200 rotates, the connecting shaft 530 rotates accordingly. The connecting shaft 530 drives the movable plate 520 to move along the axis of the character wheel group, and generates displacement between it and the spring stop 510, so that the movable plate 520 and the spring stop 510 have two position states: abutting and misaligned.

[0133] Specifically, refer to Figure 14 As shown, the spring stop claw 510 is an elastic sheet, on which extend claw portions 512 in the same number as the number wheel 350, and the claw portions 512 can contact the number wheel 350. When the number wheel 350 rotates, spring stop jumping is generated on the number wheel 350.

[0134] The movable plate 520 is located outside the spring stop claw 510 and can move linearly along the axis of the spindle 310. The spring stop claw 510 is provided with a bent piece 511, which bends toward the movable plate 520. The movable plate 520 is provided with a top block 521 corresponding to the bent piece 511. When the top block 521 corresponds to the bent piece 511, it holds the bent piece 511 toward the character wheel 350, so that the claw part 512 can contact the outer surface of the character wheel 350. When the movable plate 520 moves under the action of the mechanical lock 200, the top block 521 and the bent piece 511 are misaligned. At this time, the bent piece 511 is not held, and the claw part 512 is disengaged from the character wheel 350. At this time, the character wheel 350 will not jump when it rotates.

[0135] Preferably, the lower end of the spring-loaded claw 510 is rotatably mounted on the housing 100; at the same time, the tail of the movable plate 520 is provided with a top-holding spring 540, so that the movable plate 520 has a tendency to move toward the mechanical lock 200.

[0136] Specific reference Figures 15-17 As shown, the lock housing 220 of the mechanical lock 200 is provided with a spring stop push block 531. When the lock housing 220 rotates, the spring stop push block 531 pushes the movable plate 520 to move away from the mechanical lock 200, thereby changing the relative position of the movable plate 520 and the spring stop claw 510.

[0137] To ensure that the movable plate 520 does not interfere with other components when it moves, a pusher 522 is provided on the movable plate 520 extending toward the mechanical lock 200. The spring-loaded pusher 531 and the pusher 522 contact and push, causing the movable plate 520 to move.

[0138] Meanwhile, in order to limit the movement of the movable plate 520, a groove is provided on the back of the outer casing 100, and the movable plate 520 is provided with a sliding foot 523 that can slide in the groove.

[0139] When the mechanical lock 200 is rotated to unlock, it drives the movable plate 520 to move, causing the top block 521 and the bent piece 511 to misalign, and the spring stop pawl 510 to disengage from the digit wheel 350. At this time, the mechanical lock 200 simultaneously drives the zeroing mechanism to return the digit wheel group to zero. Since the spring stop pawl 510 is separated from the digit wheel 350, the digit wheel group will not bounce when it automatically returns to zero, thus achieving a hidden zeroing of the digit wheel group.

[0140] After the mechanical lock 200 is reset, the top holding spring 540 at the tail of the movable plate 520 is reset, pushing the movable plate 520 to move towards the mechanical lock 200, so that the top block 521 and the bent piece 511 are aligned, and the bent piece 511 is pushed towards the digit wheel assembly, so that the spring stop pawl 510 and the digit wheel 350 are in contact. At this time, when the digit wheel 350 is turned, it will bounce.

[0141] This embodiment also includes a linkage between the movable plate 520 and the locking assembly 400. (Refer to...) Figure 18 As shown, the movable plate 520 and the lever drive component 410 of the locking assembly 400 are located on both sides of the digit wheel assembly, and a linkage part 414 is provided on the rotating rod 413 of the lever drive component 410. A linkage push block 524 extends from the movable plate 520 toward the linkage part 414. When the mechanical lock 200 is rotated to unlock, the movable plate 520 moves under the action of the spring stop push block 531, and the linkage push block 524 moves accordingly. During the movement, it contacts the linkage part 414 and pushes the linkage part 414 to move. The linkage part 414 drives the entire lever drive component 410 to move around the axis of the rotating rod 413, thereby moving the pawl 411 away from the positive code groove 341 on the core sleeve 340.

[0142] After the mechanical lock 200 is unlocked, the external force for rotation of the mechanical lock 200 is removed. At this time, the dial wheel group has returned to zero, and the locking assembly 400 is reset under the action of the first torsion spring 430 and the second torsion spring 440, locking the mechanical lock 200. When the lever drive component 410 rotates under the action of the first torsion spring 430, it pushes the linkage push block 524, causing the linkage push block 524 to move towards the side of the mechanical lock 200, thereby driving the movable block to move.

[0143] In this embodiment, the end face where the linkage push block 524 and the linkage part 414 contact is set as an inclined surface, so that the generated mutual pushing force is a force inclined in the relative movement direction, thereby having a horizontal component force to push each other.

[0144] When a portion of the transmission in the spring stop assembly 500 or the locking assembly 400 fails, this linkage structure can reset the failed component, thereby ensuring that the mechanical lock 200 can be used normally.

[0145] (Code-finding agency)

[0146] It also includes a code-finding component 600, which is disposed on the back of the housing 100 and has a code-finding rod 610 that can extend into the housing 100 to find the code of the character wheel assembly.

[0147] The character wheel assembly is provided with a code-finding slot 342 that can accommodate the insertion of the code-finding lever 610.

[0148] Specific reference Figure 19 and Figure 20 As shown, the code finding component 600 includes a housing 620 located on the back of the housing 100, and a code finding knob 630 is movably provided on the housing 620.

[0149] The code selection knob can rotate relative to the housing 620, or be pushed into the housing 620 under external force, driving the code selection lever 610 to contact the character wheel group for code selection.

[0150] When a user forgets the correct password, they can rotate the code search knob 630. When rotating the code search knob 630, the code search lever 610 is pushed toward the character wheel assembly until the end of the code search lever 610 is inserted into the code search slot 342 or contacts the outer circumference of the character wheel assembly. At this time, the character wheel 350 is rotated. When the position of the code search slot 342 corresponds to the code search lever 610, the holding force on the end of the code search lever 610 disappears. When the code search knob 630 is rotated again, the code search lever 610 can be pushed into the code search slot 342.

[0151] Preferably, in this embodiment, the code-finding slot 342 is disposed on the core sleeve 340.

[0152] Specifically, refer to Figure 21 As shown, the inner end face of the code-finding knob 630 is configured as a push surface 631, and the push surface 631 is a spiral end face;

[0153] The code-finding rod 610 is mounted on the code-finding plate 640, and the back of the code-finding plate 640 is provided with a protrusion 643 that contacts the push surface 631.

[0154] Preferably, the end face of the protrusion 643 is also configured as a spiral end face that cooperates with the push surface 631. When the code-finding knob 630 is rotated, the push surface 631 climbs along the end face of the protrusion 643, pushing the protrusion 643 toward the character wheel 350.

[0155] In this embodiment, the code-finding plate 640 includes a movably disposed cover 641 and a base plate 642. A protrusion 643 is located on the base plate 642, and a spring 644 is provided between the cover 641 and the base plate 642. The number of springs 644 is the same as the number of code-finding rods 610, which are used to hold the code-finding rods 610. During the code-finding process, when the code-finding knob 630 is rotated to the correct position, the character wheel group is in a random code position. At this time, the end of the code-finding rod 610 is held against the circumferential surface of the core sleeve 340 and partially retracted into the code-finding plate 640, and the spring 644 is in a compressed state. When the character wheel 350 rotates to the correct number, the position of the code-finding slot 342 corresponds to the code-finding rod 610. The code-finding rod 610 is pushed out by the action of the spring 644 and inserted into the code-finding slot 342. At this time, the character wheel group cannot be rotated, that is, the code-finding is completed.

[0156] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A combination lock, comprising, The outer casing has an inner cavity, and the panel is provided with a lock cylinder hole and a dial groove; A mechanical lock includes a lock cylinder and a lock housing that are interlocked by a blade, wherein a lock plate is connected to the tail of the lock cylinder and is located on the back of the housing, and is locked to an external door or cabinet; A combination lock includes a set of digit wheels and a spindle passing through the center of the set of digit wheels, wherein the spindle is driven by the mechanical lock and is capable of moving along an axial direction; Its features are: It also includes, A zeroing mechanism is located between the mechanical lock and the combination lock. It is driven by the mechanical lock to automatically return the dials on the combination lock to zero. A locking assembly is located on the side of the character wheel assembly. The mechanical lock has a locking part. The locking assembly is driven by the combination lock and can be connected to the locking part to lock the mechanical lock. The zeroing mechanism is located between the spindle and the character wheel assembly. The spindle is driven by a mechanical lock and moves toward the side away from the mechanical lock, and during the movement, it drives the character wheel assembly to rotate back to zero. The spindle is provided with an end block that can be connected to a mechanical lock. When the mechanical lock rotates, it pushes the end block toward one side of the spindle, thereby causing the end block to push the spindle backward. The character wheel assembly includes at least a character wheel core sleeved on a spindle, and the zero-return mechanism is a drive part set on the spindle. The character wheel core is provided with a cooperating part that cooperates with the drive part and is driven by the drive part. The driving part is a protrusion provided on the outer periphery of the spindle; the mating part is a guide wall provided on the inner wall of the character wheel core, and the end face of the guide wall facing the mechanical lock is formed as a guide surface; The protrusion contacts the guide surface and drives the guide surface.

2. The combination lock according to claim 1, characterized in that: The end block is provided with an arc-shaped surface, which matches the shape of the mechanical lock; The mechanical lock is provided with a drive block, and the arc-shaped surface is provided with a drive groove that can accommodate the drive block; when the mechanical lock rotates, it drives the drive block to rotate, and pushes the end block linearly.

3. The combination lock according to claim 1, characterized in that: The head of the driving part is set as a pointed tip, the guide surface is two symmetrically arranged logarithmic spiral arc surfaces, and the guide wall is provided with a through groove at the junction of the two arc surfaces to accommodate the passage of the driving part.

4. The combination lock according to claim 1, characterized in that: The locking assembly includes a lever drive component and a locking rod. The first end of the lever drive component has a retracted and extended position relative to the number wheel assembly, thereby causing the second end to have a position away from and close to the lock housing. When the second end approaches the lock housing, push the locking lever toward the lock housing to connect it with the locking part; A locking block is provided at one end of the locking rod that is connected to the locking part, and the locking part is a locking groove.

5. The combination lock according to claim 4, characterized in that: The first end of the lever drive component is configured as a pawl, and the character wheel assembly is provided with a positive code groove that can accommodate the pawl to engage. The second end is configured as a pushing part; The lever drive component is also provided with a first torsion spring, the two torsion feet of the first torsion spring abutting against the push part and the outer shell respectively, so that the push part has a tendency to move away from the lock shell.

6. The combination lock according to claim 4, characterized in that: The locking rod has a stop bar extending from one end of the locking block toward the lever drive component, and the pushing part of the lever drive component is located between the stop bar and the lock housing; A second torsion spring is located at the other end of the locking rod.

7. The combination lock according to claim 6, characterized in that: A spring post is provided on the other end of the locking rod, and the second torsion spring is sleeved on the spring post; Furthermore, a stop block is provided on the locking rod on the same side as the second torsion spring, and the two torsion feet of the second torsion spring abut against the stop block and the inner wall of the outer casing, respectively.

8. The combination lock according to claim 1, characterized in that: It also includes a spring stop assembly, which includes a spring stop pawl, a movable plate for pushing the spring stop pawl toward one side of the number wheel assembly, and a connecting shaft disposed on the mechanical lock; When the mechanical lock rotates, the connecting shaft rotates accordingly. The connecting shaft drives the movable plate to move along the axis of the character wheel assembly, creating displacement between it and the spring stop pawl. This results in two positional states between the movable plate and the spring stop pawl: abutment and misalignment.

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