digit wheel lock and its digit wheel zeroing mechanism

Abstract

This invention discloses a digit lock and its digit reset mechanism, which can extend the reset response time of the digit lock during the unlocking process. The digit reset mechanism includes a fixed base and an operating component; a reset lever is movably installed in the fixed base; a first stop and a first spring are provided between the operating component and the reset lever, the first stop slidingly engaged in the fixed base, and the first spring being disposed between the first stop and the fixed base or the digit lock housing; a reset boss and a linkage boss are provided on the circumferential surface of the operating component; the reset boss is positioned opposite to the end of the reset lever, and when the reset boss abuts against the reset lever, it drives the reset lever to move axially to bring the digit lock into a reset state; the linkage boss is positioned opposite to the first stop, and when the linkage boss abuts against the first stop, it drives the first stop to compress the first spring; a limit protrusion is provided on the side of the end of the reset lever, and the first stop is provided with a limit stop opposite to the limit protrusion, the limit protrusion and the limit stop mutually limiting each other.

Description

Technical Field

[0001] This invention relates to the field of combination lock technology, and in particular to a digit lock and its digit zeroing mechanism. Background Technology

[0002] Combination locks are a type of lock that typically uses a set of numbers or symbols to unlock. Users only need to remember the password and do not need to configure a key, making them more convenient to use. Among mechanical combination locks, wheel locks are quite common. Users input the password by turning the wheel. When the password is correct, the limiting structure between the wheel and the lock shaft is released, and the user can then unlock the lock by turning the knob or handle.

[0003] In existing technologies, to prevent the combination of a digit lock from being leaked, users typically need to manually scramble the combination after unlocking or locking, which is cumbersome and results in a poor user experience. Subsequent improvements have added a zeroing mechanism to the digit lock. This mechanism utilizes the magnetic force between the digit and the lock shaft to allow the digit to rotate automatically when not subjected to force from other parts, thus achieving automatic zeroing (because normally the numbers displayed on the lock panel are automatically reset to 0000, hence the term "zeroing"; in reality, "zeroing" can also change the numbers displayed on the panel to any set of numbers preset during lock assembly).

[0004] However, the technology of using magnetic attraction to reset the digit lock is not yet mature enough. The main reason is that the lock opening and closing speed is too fast, and the response time of the digit lock's magnetic reset is too short. The digit lock cannot be guaranteed to be reset within such a short response time, which means that the digit lock still has the risk of password leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a digit lock and its digit zeroing mechanism, which solves the problems existing in the prior art, can effectively extend the zeroing response time of the digit lock during the unlocking process, ensure that the digit lock can be zeroed, and eliminate the risk of password leakage.

[0006] To achieve the above objectives, one solution of the present invention is:

[0007] A digit lock's digit wheel reset mechanism includes a fixed base and an operating component mounted side-by-side within the digit lock's housing. A reset lever for switching the digit lock's reset state is movably mounted within the fixed base. A first stop and a first spring are disposed between the operating component and the reset lever. The first stop slides within the fixed base, and the first spring is disposed between the first stop and the fixed base or the digit lock's housing. A reset boss and a linkage boss are provided on the circumferential surface of the operating component. The reset boss is positioned opposite to the end of the reset lever, and when the reset boss abuts against the reset lever, it drives the reset lever to move axially. This allows the digit lock to enter a zero-state. The linkage boss is positioned opposite to the first stop block, and when the linkage boss abuts against the first stop block, it drives the first stop block to compress the first spring. A limit protrusion is provided on the side of the end of the zero-state lever, and the first stop block is provided with a limit stop block opposite to the limit protrusion. The limit protrusion and the limit stop block mutually limit each other: In the locked state, the limit protrusion limits the limit stop block to keep the first stop block in the state of compressing the first spring; in the unlocked state, the limit stop block limits the limit protrusion to prevent the zero-state lever from resetting, and the digit lock remains in the zero-state.

[0008] The operating component is the lock cylinder tail of the digit lock.

[0009] The zeroing boss and the linkage boss are offset in the circumferential direction of the operating component.

[0010] The fixed base is provided with a guide groove for the first stop block to slide and engage.

[0011] A linkage ramp is provided on the lower side of the linkage boss, and a protrusion is provided on the side of the first stop block facing the operating component. The linkage ramp and the protrusion are movably engaged to realize the linkage between the linkage boss and the first stop block.

[0012] The upper surface of the fixed base is covered with a panel, and the panel is provided with a movable hole; a button is movably fitted in the movable hole; the button is disposed opposite to the first stop block, and the button and the first spring are located on the upper and lower sides of the first stop block, for driving the first stop block to compress the first spring.

[0013] Preferably, the button is hooked onto the inner wall edge of the movable hole by a number of hooks.

[0014] Preferably, a driving block is provided between the button and the first stop block; a return spring is provided between the driving block and the fixed base.

[0015] The second solution of the present invention is:

[0016] A digit wheel lock, including a digit wheel zeroing mechanism.

[0017] After adopting the above technical solution, the present invention has the following technical effects:

[0018] This invention establishes a first stop and a first spring between the operating component of the digit lock and its zeroing lever. The zeroing lever's limiting protrusion and the first stop's limiting block mutually limit each other. Specifically, in the unlocked state, when the zeroing protrusion pushes the zeroing lever axially and releases the limiting protrusion's restriction on the limiting stop, the limiting stop springs up, blocking the limiting protrusion and thus preventing the zeroing lever from resetting. This allows the digit lock to remain in the zeroed state for a longer period, ensuring the digits have sufficient time to perform the "digit zeroing" function, guaranteeing all digits are zeroed and eliminating the risk of password leakage. During locking, the operating component's linkage protrusion links with the first stop, restoring it to the state of compressing the first spring. This releases the limiting block's restriction on the limiting protrusion, allowing the zeroing lever to reset and the digit lock to exit the zeroed state. Attached Figure Description

[0019] Figure 1 A 3D diagram of a tumbler lock;

[0020] Figure 2 An exploded view of a digit lock;

[0021] Figure 3 An exploded view of the cryptographic components;

[0022] Figure 4 This is an exploded view of the locking shaft;

[0023] Figure 5 An exploded view of the character wheel;

[0024] Figure 6 This is a schematic diagram showing the engagement of the anti-rotation latch with the number wheel in the locked state;

[0025] Figure 7 A schematic diagram showing the stop-rotation latch disengaging from the number wheel when in the zero-reset state;

[0026] Figure 8 This is a schematic diagram showing the state of the zeroing lever and the anti-rotation slide when locked.

[0027] Figure 9 A schematic diagram showing the state of the zeroing lever and the anti-rotation slide when the device is in the zeroing state.

[0028] Figure 10 This is a schematic diagram showing the state of the lock cylinder tail, the first stop block, and the zeroing lever when locked.

[0029] Figure 11 A schematic diagram showing the state of the lock cylinder tail, the first stop block, and the zeroing lever when in the zeroing state;

[0030] Figure 12 A schematic diagram showing the state between the button and the reset lever when in the reset state;

[0031] Figure 13 This is a schematic diagram illustrating the process of releasing the reset state via a button.

[0032] Figure 14 A 3D view of the second stop and the second spring added when the digit lock is set to temporary mode;

[0033] Figure 15 This is a schematic diagram of the locked state of a tumbler lock with a temporary mode.

[0034] Figure 16 A diagram illustrating the unlocking process of a coin lock with a temporary mode. Figure 1 ;

[0035] Figure 17 A diagram illustrating the unlocking process of a coin lock with a temporary mode. Figure 2 ;

[0036] Figure 18 A diagram illustrating the locking process of a tumbler lock with a temporary mode. Figure 1 ;

[0037] Figure 19 A diagram illustrating the locking process of a tumbler lock with a temporary mode. Figure 2 ;

[0038] Figure 20 This is a three-dimensional view of the mounting base;

[0039] Explanation of icon numbers:

[0040] 1-Keypad assembly; 11-Retainer; 12-Lock shaft; 121-Locking protrusion; 13-Bushing; 131-Relief groove; 14-Pin wheel; 141-Anti-rotation groove; 15-Retainer spring; 16-Lock shaft spring; 17-First magnet; 18-Second magnet; 2-Fixing base; 21-Guide groove; 3-Knob; 4-Panel; 41-Moving hole; 5-Anti-rotation spring; 6-Anti-rotation slide bar; 61-Anti-rotation latch; 7-Reset lever; 71-Limiting protrusion; 8-Lock cylinder Tail; 81-Zeroing boss; 811-Zeroing boss inclined surface; 82-Linkage boss; 821-Linkage inclined surface; 83-Code changing groove; 831-Slide groove; 9-First stop block; 91-Limit stop block; 92-Protrusion; 10-First spring; 20-Button; 201-Hook; 30-Drive block; 40-Reset spring; 50-Second stop block; 501-Compression inclined surface; 502-Climbing inclined surface; 503-Curved surface; 60-Second spring; 100-Character wheel lock housing. Detailed Implementation

[0041] The following section first explains some working principles of conventional swivel locks in order to provide a clearer understanding of the technical solution of this invention.

[0042] (1) Basic structure

[0043] See Figure 2-4 The housing of a digit lock typically includes a mounting base 2 for securing the combination component 1. The combination component 1 consists of a retainer 11 slidably fitted onto the mounting base 2, a lock shaft 12 passing through the retainer 11, several bushings 13 sleeved on the lock shaft 12, and digit wheels 14 sleeved on each bushing 13. The retainer 11 restricts the digit wheel 14's axial position on the lock shaft 12, ensuring that the digit wheel 14 rotates synchronously with its corresponding bushing 13 during both the lock opening and closing states. In the combination changing state (in the industry, this mainly refers to the state where the lock can change the combination), the digit wheel 14... The retainer 11 is disengaged from the bushing 13 so that the dial wheel 14 can rotate relative to the bushing 13, thereby changing the password. Therefore, whether the retainer 11 moves or not determines whether the lock switches to the password changing state. When the locking protrusion 121 on the lock shaft 12 is aligned with the relief groove 131 in the bushing 13 (i.e., the user has entered the correct password / the panel 4 displays the correct password), the locking protrusion 121 can be inserted into the relief groove 131 to achieve axial movement of the lock shaft 12 within the fixed seat 2. At this time, the user will not be interfered with when rotating the lock knob 3 or handle, and can unlock normally. In addition, the retainer 11 and the lock shaft 12 are reset by the retainer spring 15 and the lock shaft spring 16, respectively.

[0044] (2) How to reset to zero

[0045] See Figure 4 , 5 The lock shaft 12 and the dial 14 are respectively equipped with a first magnet 17 and a second magnet 18. When the dial 14 is not subjected to the force of other parts, it can rotate under the action of magnetic force through the magnetic attraction between the first magnet 17 and the second magnet 18 without the user having to manually rotate the dial. The dial 14 stops rotating when the magnetic force reaches equilibrium. In a typical lock design, when the magnetic force reaches equilibrium, the number displayed on the outside of the panel 4 for all dials 14 is "0" (0 is the industry standard setting). Therefore, this function is commonly referred to as "diagram zeroing".

[0046] (3) Stopping the rotation of the type wheel

[0047] See Figure 6 , 7An anti-rotation slide rod 6 driven by an anti-rotation spring 5 is provided in the fixed base 2. The anti-rotation slide rod 6 is provided with anti-rotation buckles 61 corresponding to the number of character wheels 14. Under normal conditions, the elastic force of the anti-rotation spring 5 causes the anti-rotation slide rod 6 to move towards the character wheel 14, so that the anti-rotation buckles 61 are embedded in the anti-rotation grooves 141 on the circumference of the character wheel 14. This allows the character wheel 14 to stay when it is no longer subjected to external force after the user moves it, and it will not rotate due to the magnetic force. It can be understood that the force of the user moving the character wheel 14 is greater than the elastic force of the anti-rotation buckle 61, while the magnetic force is less than the elastic force of the anti-rotation buckle 61.

[0048] (4) How to switch to zero state

[0049] First, the zero-state is defined as the state where the lock's dial automatically resets to a preset set of numbers (such as 0000) when not moved by the user. See also Figure 2 , 6 -9. A zeroing lever 7 is provided in the fixed base 2, which is opposite to the anti-rotation slide rod 6. The anti-rotation slide rod 6 and the zeroing lever 7 are engaged by a bevel. At the same time, the zeroing lever 7 abuts against the circumferential surface of the lock's operating component (the component that rotates synchronously with the knob 3 or handle) (generally the circumferential surface of the lock cylinder tail 8). A zeroing boss 81 is provided on this circumferential surface. When the correct password is entered and the operating component is rotated to unlock, the zeroing boss 81 contacts the zeroing lever 7 and pushes the zeroing lever 7 to move. The zeroing lever 7, through the bevel linkage with the anti-rotation slide rod 6, causes its anti-rotation latch 61 to disengage from the anti-rotation groove 141 of the dial wheel 14. At this time, the dial wheel 14 automatically returns to zero under the action of magnetic force. When the operating component is rotated so that the zeroing boss 81 disengages from the zeroing lever 7, the anti-rotation slide rod 6 is reset under the action of the anti-rotation spring 5 and resets through the bevel linkage with the zeroing lever 7. After the anti-rotation slide rod 6 is reset, the dial wheel 14 no longer automatically returns to zero. In other words, by rotating the operating component to a certain angle, the lock can be switched to the zero state.

[0050] The above are all technical means that have been disclosed in the prior art and are not the focus of the improvement of this invention. The main improvement of this invention lies in the related structure between the operating components of the digit lock and the zeroing lever. Therefore, the specific structure of the password component is not limited. In other words, in practical applications, this invention can also be applied to digit locks that realize the digit zeroing function in a non-magnetic way.

[0051] Based on this, refer to Figure 1-20 As shown, the present invention discloses a digit wheel zeroing mechanism for a digit wheel lock, including a fixed base 2 and an operating component installed side by side within the digit wheel lock housing 100;

[0052] A zeroing lever 7 for switching the zeroing state of the digit lock is movably installed inside the fixed base 2; when the zeroing lever 7 moves axially relative to the fixed base 2, the digit lock enters the zeroing state; after the zeroing lever 7 is reset, the digit lock exits the zeroing state; in the zeroing state, the digit wheel 14 of the digit lock rotates to reset.

[0053] A first stop 9 and a first spring 10 are provided between the operating component and the zeroing lever 7. The first stop 9 is slidably fitted in the fixed seat 2 along a direction perpendicular to the axis of the zeroing lever 7. The first spring 10 is provided between the first stop 9 and the fixed seat 2 or the number wheel lock housing 100.

[0054] The operating component has a zeroing boss 81 and a linkage boss 82 on its peripheral surface; the zeroing boss 81 is positioned opposite to the end of the zeroing lever 7, and when the zeroing boss 81 abuts against the zeroing lever 7, it drives the zeroing lever 7 to move axially so that the digit lock enters the zeroing state; the linkage boss 82 is positioned opposite to the first stop block 9, and when the linkage boss 82 abuts against the first stop block 9, it drives the first stop block 9 to compress the first spring 10;

[0055] The end side of the zeroing lever 7 is provided with a limiting protrusion 71, and the first stop 9 is provided with a limiting stop 91 opposite to the limiting protrusion 71. The limiting protrusion 71 and the limiting stop 91 mutually limit each other: see Figure 10 In the locked state, the limiting protrusion 71 limits the limiting stop 91 to keep the first stop 9 in a state of compressing the first spring 10; see also Figure 11 When the lock is in the unlocked state, the limit block 91 limits the limit protrusion 71 to prevent the zeroing lever 7 from resetting, and the digit lock remains in the zeroing state.

[0056] Through the above solution, the present invention sets a first stop 9 and a first spring 10 between the operating component of the tumbler lock and its zeroing lever 7, and mutually limits the zeroing lever 7's limiting protrusion 71 and the first stop 9's limiting block 91. Especially in the unlocked state, when the zeroing protrusion 81 pushes the zeroing lever 7 to move axially and releases the limiting protrusion 71 from limiting the limiting block 91, the limiting block 91 can spring up under the action of the first spring 10, so that the limiting block 91 blocks the limiting protrusion 71, thereby achieving the limiting effect of the limiting block 91. The limiting position of the protrusion 71 prevents the reset lever 7 from being reset. At this time, the digit lock can remain in the reset state, so that the digit wheel 14 of the digit lock has a long enough time to perform the "digit wheel reset" function, ensuring that all digit wheels 14 of the digit lock can be reset to zero, eliminating the risk of password leakage. During the locking process, the linkage protrusion 82 of the operating component can link the first stop 9 to restore it to the state of compressing the first spring 10. That is, the limiting stop 91 releases the limiting protrusion 71, the reset lever 7 can be reset and the digit lock exits the reset state.

[0057] The following shows a specific implementation of the digit wheel zeroing mechanism of the aforementioned digit wheel lock.

[0058] The aforementioned operating component is the lock cylinder tail 8 of the digit lock, which is linked with the knob 3 of the digit lock to achieve synchronous rotation.

[0059] The aforementioned zeroing boss 81 and linkage boss 82 are offset in the circumferential direction of the operating component, that is, the angles of the two are different, so that the contact time of the two pairs of structures, namely the zeroing boss 81 and the zeroing lever 7, and the linkage boss 82 and the first stop block 9, is sequential, thus avoiding mutual interference between functions.

[0060] See Figure 20 The aforementioned fixed base 2 is provided with a guide groove 21 for sliding engagement of the first stop block 9, which is used to install the first stop block 9 and guide the sliding direction of the first stop block 9.

[0061] A linkage ramp 821 is provided on the lower side of the aforementioned linkage boss 82. A protrusion 92 is provided on the side of the first stop block 9 facing the operating component. The linkage ramp 821 and the protrusion 92 are movably engaged to realize the linkage between the linkage boss 82 and the first stop block 9. When the operating component rotates and the protrusion 92 contacts the linkage ramp 821, the linkage ramp 821 presses down the protrusion 92 to compress the first stop block 9 and the first spring 10.

[0062] See Figure 2 , 12 13. The upper surface of the aforementioned fixing base 2 is covered with a panel 4, and the panel 4 is provided with a movable hole 41; a button 20 is movably fitted inside the movable hole 41; the button 20 is disposed opposite to the first stop block 9, and the button 20 and the first spring 10 are located on the upper and lower sides of the first stop block 9, used to drive the first stop block 9 to compress the first spring 10. See Figure 13 By actively pressing button 20, the user can actively release the first stop 9 from limiting the zeroing lever 7, thereby allowing the digit lock to quickly exit the zeroing state.

[0063] Furthermore, the button 20 is hooked onto the inner edge of the movable hole 41 by several hooks 201 to prevent the button 20 from detaching from the panel 4.

[0064] Meanwhile, a driving block 30 is provided between the button 20 and the first stop block 9. The driving block 30 can be designed into different shapes according to the installation positions of the button 20 and the first stop block 9 in the panel 4 and the fixed base 2, so as to realize the linkage between the two. A reset spring 40 is provided between the driving block 9 and the fixed base 2, which is used to drive the driving block 9 and link the button 20 to reset.

[0065] See Figure 1The present invention also discloses a character wheel lock, which includes the character wheel zeroing mechanism of the above-mentioned character wheel lock, and therefore also has the corresponding technical effects of the character wheel zeroing mechanism.

[0066] The above describes a digit lock with a "digit reset" function that can maintain the digit lock in a reset state for an extended period during unlocking. Furthermore, when applications require more functionality from digit locks, such as those used in public lockers where each user-set password is one-time, manufacturers desire automatic password reset after unlocking. This means the lock should automatically revert to the preset password without user intervention. Therefore, this invention, building upon the above technical solution, can be further improved to include a temporary mode where each password set is one-time and automatically resets to the initial password after unlocking.

[0067] See Figure 14-19 The temporary mode digit lock also includes a retainer 11, a second stop 50, and a second spring 60; the circumferential surface of the operating component is provided with a digit-changing groove 83 for the end of the retainer 11 to move and engage; the second stop 50 is disposed in the digit-changing groove 83 to block the movement of the end of the retainer 11, and the second spring 60 is located between the second stop 50 and the side wall of the digit-changing groove 83; a compression ramp 501 is provided on one side of the second stop 50 so that when the end of the retainer 11 contacts the second stop 50 on this side, it can push the second stop 50 to compress the second spring 60, so that the retainer 11 will not be blocked by the second stop 50 when the operating component rotates, thus avoiding interference with the rotation of the operating component; in the circumferential direction of the operating component, the two ends of the zeroing boss 81 are respectively located inside the two ends of the digit-changing groove 83.

[0068] The unlocking principle of temporary mode is as follows:

[0069] ① When the operating component rotates in the unlocking direction, the end of the retainer 11 first enters the digit changing groove 83 to put the digit lock into the digit changing state (see...). Figure 16 );

[0070] ② The operating component continues to rotate, and the zeroing lever 7 contacts the zeroing boss 81 to put the digit lock into the zeroing state (see...). Figure 17 The superposition of the code-changing state and the zeroing state causes the digit lock's password to be automatically reset to the preset password (generally referred to as the initial password), thus completing the password initialization.

[0071] ③ The operating component continues to rotate, and the end of the retainer 11 presses the second stop 50 to compress the second spring 60 until the lock is unlocked. If the user needs to change the password, the operation can be performed at this time (if not, the lock will retain the preset password): The user presses the button 20 on the panel 4, and the button 20 pushes the drive block 30 to act on the first stop 9. The first stop 9 compresses the first spring 10 to release the limit on the zeroing lever 7. The zeroing lever 7 is popped out, and the anti-rotation buckle 61 falls into the anti-rotation groove 141 of the number wheel 14. The number wheel 14 no longer rotates. The user can change the password by moving the number wheel 14.

[0072] The locking principle in temporary mode is as follows (this explanation is based on the premise that the user has changed the lock's password after the password reset):

[0073] When the operating component rotates in the locking direction, the end of the retainer 11 first passes over the ramp 502 of the second stop 50 during its return stroke; when the end of the retainer 11 abuts against the curved surface 503 of the second stop 50, the numbers displayed on the outside of the panel 4 are still the user-set password; when the retainer 11 climbs to the curved surface 503, the zeroing boss 81 contacts the zeroing lever 7 again (see...). Figure 19 The digit lock then enters the zeroing state again, and the anti-rotation latch 61 separates from the anti-rotation groove 141 of the digit wheel 14. As the operating components rotate, when the zeroing lever 7 has completely passed the zeroing boss inclined surface 811, the digit lock completes the digit wheel zeroing, thus realizing the digit wheel zeroing function after the user changes the password. Since the numbers displayed by the digit lock after zeroing are different from the user's changed password, the clearance groove 131 of the bushing 13 and the locking protrusion 121 of the lock shaft 12 are misaligned, preventing the digit lock retainer 11 from falling into the code-changing groove 83, meaning the digit lock will not enter the code-changing state.

[0074] Of course, if the user does not change the password after the password reset, the above locking principle still applies, but the number wheel 14 will no longer rotate because it is already in a state of magnetic equilibrium.

[0075] In the temporary mode, the other side of the second stop 50 is provided with a ramp 502, which is used to push the retainer 11 to reset, so that the digit lock exits the code-changing state.

[0076] In the temporary mode, the aforementioned code-changing groove 83 is provided with a sliding groove 831 for the second stop block 50 to slide and engage.

[0077] The above temporary mode can be used in the following scenarios:

[0078] (1) After the previous user unlocks the lock, the lock automatically resets the password to the initial password, and the user unlocks the lock using the initial password;

[0079] (2) When the cabinet door is open, if the current user needs to use the cabinet, they can press button 20 to change the password and then close the door; if the user does not change the password, the password will still be the initial password when the door is closed.

[0080] (3) After that, the user needs to use the correct password to unlock the door and reset the password again. If the user accidentally changes the password and closes the door (i.e., the user does not know what password he changed) or forgets the password, the administrator key can be used to unlock the door or retrieve the code.

[0081] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A digit wheel zeroing mechanism for a digit wheel lock, characterized in that: Includes a mounting base and operating components mounted side-by-side inside the digit lock housing; A zeroing lever for switching the zeroing state of the digit lock is movably installed inside the fixed base; A first stop and a first spring are provided between the operating component and the zeroing lever. The first stop is slidably fitted in the fixed base, and the first spring is disposed between the first stop and the fixed base or the character wheel lock housing. The operating component has a zeroing boss and a linkage boss on its peripheral surface; the zeroing boss is disposed opposite to the end of the zeroing lever, and when the zeroing boss abuts against the zeroing lever, it drives the zeroing lever to move axially so that the digit lock enters the zeroing state; the linkage boss is disposed opposite to the first stop block, and when the linkage boss abuts against the first stop block, it drives the first stop block to compress the first spring. The end side of the zeroing lever is provided with a limiting protrusion, and the first stop is provided with a limiting stop opposite to the limiting protrusion. The limiting protrusion and the limiting stop mutually limit each other: in the locked state, the limiting protrusion limits the limiting stop so that the first stop remains in the state of compressing the first spring; in the unlocked state, the limiting stop limits the limiting protrusion to prevent the zeroing lever from resetting, and the digit lock remains in the zeroing state.

2. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 1, characterized in that: The operating component is the lock cylinder tail of the digit lock.

3. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 1, characterized in that: The zeroing boss and the linkage boss are offset in the circumferential direction of the operating component.

4. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 1, characterized in that: The fixed base is provided with a guide groove for the first stop block to slide and engage.

5. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 1, characterized in that: A linkage ramp is provided on the lower side of the linkage boss, and a protrusion is provided on the side of the first stop block facing the operating component. The linkage ramp and the protrusion are movably engaged to realize the linkage between the linkage boss and the first stop block.

6. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 1, characterized in that: The upper surface of the fixed base is covered with a panel, and the panel is provided with a movable hole; a button is movably fitted in the movable hole; the button is disposed opposite to the first stop block, and the button and the first spring are located on the upper and lower sides of the first stop block, for driving the first stop block to compress the first spring.

7. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 6, characterized in that: The button is hooked onto the inner edge of the movable hole by several hooks.

8. The digit wheel zeroing mechanism of the digit wheel lock as described in claim 6, characterized in that: A drive block is provided between the button and the first stop block; a return spring is provided between the drive block and the fixed base.

9. A digit lock, comprising a digit wheel zeroing mechanism as described in any one of claims 1 to 8.

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