Character wheel lock and character wheel zeroing mechanism thereof

Abstract

The invention discloses a character wheel lock and a character wheel zeroing mechanism thereof. The zeroing response time of the character wheel lock in the unlocking process can be prolonged. The character wheel zeroing mechanism comprises a fixed seat and an operation assembly; a return-to-zero driving lever is movably mounted in the fixed seat; a first check block and a first spring are arranged between the operation assembly and the zero-returning driving lever, the first check block is arranged in the fixing base in a sliding fit mode, and the first spring is arranged between the first check block and the fixing base or the character wheel lock shell; a zeroing boss and a linkage boss are arranged on the peripheral surface of the operation assembly; the zeroing boss is arranged opposite to the end part of the zeroing driving lever; when the zeroing boss is propped against the zeroing driving lever, the zeroing driving lever is driven to axially move so as to enable the character wheel lock to enter a zeroing state; the linkage boss and the first stop block are oppositely arranged, and when the linkage boss abuts against the first stop block, the first stop block is driven to compress the first spring. A limiting protruding block is arranged on the side face of the end of the zeroing deflector rod, the first check block is provided with a limiting check block opposite to the limiting protruding block, and the limiting protruding block and the limiting check block are mutually limited.

Description

Technical Field

[0001] The invention relates to the technical field of cipher locks, in particular to a cipher wheel lock and a cipher wheel zeroing mechanism thereof. Background Art

[0002] Combination locks are a branch of locks. Generally, a set of numbers or symbols are used to unlock the lock. Users only need to remember the password without configuring a key, which is more convenient to use. Among mechanical combination locks, wheel locks are more common. Users input the password by turning the wheel. When the password is correct, the limit structure between the wheel and the lock shaft is released. At this time, the user can unlock the lock by turning the knob or handle.

[0003] In the prior art, in order to prevent the password of the wheel lock from being leaked, the user is usually required to manually scramble the password after unlocking or locking, which is cumbersome to operate and has a poor user experience. In subsequent improvements, the wheel lock has added a zeroing mechanism for the wheel, which mainly uses the magnetic force between the wheel and the lock shaft to enable the wheel to rotate when not affected by other parts, thereby achieving automatic zeroing of the wheel (because the numbers displayed on the lock panel are generally automatically reset to 0000, so it is called "zeroing"; in fact, the role of "zeroing" can be to change the numbers displayed on the panel to any set of numbers preset when the lock is assembled).

[0004] However, the technology of using magnetic attraction to reset the word wheel lock is not mature enough. The main reason is that the lock is opened and closed too quickly, and the response time of the word wheel magnetic attraction to reset to zero is too short. It is difficult to ensure that the word wheel is reset to zero within the short response time, resulting in the risk of password leakage in the word wheel lock. Summary of the invention

[0005] The purpose of the present invention is to provide a word wheel lock and a word wheel zeroing mechanism thereof, which can solve the problems existing in the prior art, effectively prolong the zeroing response time of the word wheel lock during the unlocking process, ensure that the word wheel lock can be zeroed, and eliminate the hidden danger of password leakage.

[0006] In order to achieve the above object, one of the solutions of the present invention is: A zeroing mechanism for a word wheel lock comprises a fixing seat and an operating assembly which are installed in parallel in a word wheel lock housing; a zeroing lever for switching the zeroing state of the word wheel lock is movably installed in the fixing seat; a first stopper and a first spring are arranged between the operating assembly and the zeroing lever, the first stopper is slidably fitted in the fixing seat, and the first spring is arranged between the first stopper and the fixing seat or the word wheel lock housing; a zeroing boss and a linkage boss are arranged on the circumferential surface of the operating assembly; the zeroing boss is arranged opposite to the end of the zeroing lever, and when the zeroing boss abuts against the zeroing lever, the zeroing lever is driven to move axially. so that the character wheel lock enters the zeroing state; the linkage boss is arranged opposite to the first block, and when the linkage boss abuts against the first block, it drives the first block to compress the first spring; a limiting protrusion is arranged on the side of the end of the zeroing lever, and the first block is provided with a limiting block opposite to the limiting protrusion, and the limiting protrusion and the limiting block limit each other: in the locked state, the limiting protrusion limits the limiting block so that the first block maintains the state of compressing the first spring; in the unlocked state, the limiting block limits the limiting protrusion to prevent the zeroing lever from resetting, and the character wheel lock maintains the zeroing state.

[0007] The operating component is the lock core tail of the wheel lock.

[0008] The zero return boss and the linkage boss are staggered in the circumferential direction of the operating component.

[0009] A guide groove for sliding cooperation of the first stopper is arranged in the fixing seat.

[0010] A linkage slope is arranged below the side surface of the linkage boss, a protrusion is arranged on a side of the first stopper facing the operating component, and the linkage slope movably cooperates with the protrusion to realize the linkage between the linkage boss and the first stopper.

[0011] The upper surface of the fixing seat is covered with a panel, and a movable hole is arranged on the panel; a button is movably fitted in the movable hole; the button is arranged opposite to the first stopper, and the button and the first spring are located at the upper and lower sides of the first stopper, and are used to drive the first stopper to compress the first spring.

[0012] Preferably, the button is hooked on the inner wall edge of the movable hole through a plurality of hooks.

[0013] Preferably, a driving block is arranged between the button and the first stopper; and a return spring is arranged between the driving block and the fixing seat.

[0014] The second solution of the present invention is: A character wheel lock comprises the character wheel zeroing mechanism of the character wheel lock.

[0015] After adopting the above technical solution, the present invention has the following technical effects: The invention provides a first stopper and a first spring between the operating component of the word wheel lock and the zero return lever, and the limit protrusion of the zero return lever and the limit stopper of the first stopper are mutually limited, especially in the unlocking state, when the zero return protrusion pushes the zero return lever to move axially and releases the limit protrusion on the limit stopper, the limit stopper can be bounced up under the action of the first spring so that the limit stopper blocks the limit protrusion to realize the limit of the limit protrusion by the limit stopper, that is, the reset of the zero return lever is realized, at this time, the word wheel lock can be kept in the zero return state for a long time, so that the word wheel of the word wheel lock has a long enough time to perform the function of "word wheel zero return", ensuring that all word wheels of the word wheel lock can be zeroed, eliminating the hidden danger of password leakage; and in the locking process, the linkage protrusion of the operating component can link with the first stopper to make it return to the state of compressing the first spring, that is, the limit stopper releases the limit on the limit protrusion, the zero return lever can be reset and the word wheel lock exits the zero return state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a word wheel lock; Figure 2 This is an exploded view of the word wheel lock; Figure 3 This is an exploded view of the password component; Figure 4 This is an exploded view of the locked shaft; Figure 5 This is an exploded view of the word wheel; Figure 6 This is a schematic diagram of the engagement between the anti-rotation buckle and the character wheel in the locked state; Figure 7 This is a schematic diagram of the anti-rotation buckle being disengaged from the character wheel when in the zeroing state; Figure 8 It is a schematic diagram of the state of the zero return lever and the anti-rotation slide bar in the locked state; Fig. 9 A schematic diagram of the state of the zero return lever and the anti-rotation slide bar when in the zero return state; Fig.10 Schematic diagram of the lock cylinder tail, the first stopper and the reset lever in the locked state; Fig.11 Schematic diagram of the lock cylinder tail, the first stopper and the zero return lever when in the zero return state; Fig.12 A schematic diagram of the state between the button and the zero return lever when in the zero return state; Fig.13 It is a schematic diagram of the process of releasing the zero state by pressing a button; Fig.14 A three-dimensional diagram of a second stopper and a second spring added for setting the character wheel lock to a temporary mode; Fig.15 It is a schematic diagram of the locked state of the character wheel lock with temporary mode; Fig.16 Schematic diagram of the unlocking process of a wheel lock with temporary mode Figure 1 ; Fig.17 Schematic diagram of the unlocking process of a wheel lock with temporary mode Figure 2 ; Fig.18 The locking process of the word wheel lock with temporary mode is shown in FIG. Figure 1 ; Fig.19 The locking process of the wheel lock with temporary mode is shown in FIG. Figure 2 ; Fig. 20 is a three-dimensional diagram of the fixed seat; Description of Figure Numbers: 1-password assembly; 11-holder; 12-lock shaft; 121-locking protrusion; 13-bushing; 131-giving groove; 14-character wheel; 141-stop groove; 15-holder spring; 16-lock shaft spring; 17-first magnet; 18-second magnet; 2-fixed seat; 21-guide groove; 3-knob; 4-panel; 41-movable hole; 5-stop spring; 6-stop slide bar; 61-stop buckle; 7-zero return lever; 71-limiting protrusion; 8-lock cylinder Tail; 81-zeroing boss; 811-zeroing boss inclined surface; 82-linking boss; 821-linking inclined surface; 83-code changing groove; 831-slide; 9-first block; 91-limiting block; 92-protrusion; 10-first spring; 20-button; 201-hook; 30-driving block; 40-reset spring; 50-second block; 501-compression inclined surface; 502-climbing inclined surface; 503-curved surface; 60-second spring; 100-wheel lock housing. DETAILED DESCRIPTION

[0017] Hereinafter, some working principles of the conventional wheel lock are first explained so as to more clearly understand the technical solution of the present invention.

[0018] (1) Infrastructure See also Figure 2-4The housing of the wheel lock is generally provided with a fixing seat 2 for fixing the password component 1. The password component 1 is composed of a retaining frame 11 slidingly fitted on the fixing seat 2, a lock shaft 12 passing through the retaining frame 11, a plurality of bushings 13 sleeved on the lock shaft 12, and a wheel 14 sleeved on each bushing 13; wherein the retaining frame 11 is used to limit the position of the wheel 14 in the axial direction of the lock shaft 12, so that the wheel 14 and its corresponding bushing 13 are kept rotating synchronously in the switch lock state, and the wheel 14 is kept rotating synchronously in the code change state (mainly referring to the state in the industry where the lock can change the password). The lock is separated from the bushing 13 so that the character wheel 14 can rotate relative to the bushing 13, thereby achieving the purpose of changing the password. Therefore, whether the retainer 11 moves or not determines whether the lock is switched to the code-changing state; and when the locking protrusion 121 on the lock shaft 12 is opposite to the clearance groove 131 in the bushing 13 (that is, the user enters the correct password / the panel 4 displays the correct password), the locking protrusion 121 can be embedded in the clearance groove 131 to achieve the axial movement of the lock shaft 12 in the fixed seat 2. At this time, when the user rotates the knob 3 or handle of the lock, there will be no interference and the lock can be opened 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.

[0019] (2) How to reset to zero See also Figure 4 , 5 The lock shaft 12 and the character wheel 14 are respectively equipped with the corresponding first magnet 17 and second magnet 18. When the character wheel 14 is not subjected to the force of other parts, the character wheel 14 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 operate the character wheel, until the magnetic force reaches a balance and the character wheel 14 stops rotating. The general lock design is that when the magnetic force reaches a balanced state, the number displayed on the outside of the panel 4 of all the character wheels 14 is "0" (0 is the commonly set number in the industry), so it is customary to call this function "character wheel zeroing".

[0020] (3) Stopping the rotation of the character wheel See also Figure 6 , 7 A stop slide 6 driven by a stop spring 5 is arranged in the fixing seat 2; the stop slide 6 is provided with stop buckles 61 corresponding to the number of the character wheels 14. In a normal state, the elastic force of the stop spring 5 makes the stop slide 6 move toward the character wheel 14 and the stop buckle 61 is embedded in the stop groove 141 on the circumferential surface of the character wheel 14, so that after the user turns the character wheel 14, when the character wheel 14 is no longer subjected to external force, it can stay and will not rotate due to the action of magnetic force. It can be understood that the force of the user turning the character wheel 14 is greater than the elastic force of the stop buckle 61 and the magnetic force is less than the elastic force of the stop buckle 61.

[0021] (4) How to switch to zero state First, the definition of zero reset is the state when the lock wheel is automatically reset to a preset set of numbers (such as 0000) when it is not turned by the user. Figure 2 , 6 -9, a zeroing lever 7 is arranged in the fixed seat 2 opposite to the anti-rotation slide bar 6; the anti-rotation slide bar 6 and the zeroing lever 7 are matched through an inclined surface, and the zeroing lever 7 abuts against the circumference of the operating component of the lock (the component that rotates synchronously with the knob 3 or the handle) (generally the circumference of the lock core tail 8), and a zeroing boss 81 is arranged on the circumference: when the correct password is entered and the operating component is rotated to unlock the lock, the zeroing boss 81 contacts the zeroing lever 7 and pushes the zeroing lever 7 to move, and the zeroing lever 7 is linked to the anti-rotation slide bar 6 through the inclined surface to make its anti-rotation buckle 61 disengage from the anti-rotation groove 141 of the character wheel 14, and at this time the character wheel 14 automatically returns to zero under the action of magnetic force; when the operating component is rotated to make the zeroing boss 81 disengage from the zeroing lever 7, the anti-rotation slide bar 6 is reset under the action of the anti-rotation spring 5 and reset through the inclined surface linkage zeroing lever 7, and the character wheel 14 no longer automatically returns to zero after the anti-rotation slide bar 6 is reset. That is to say, by rotating the operating component to a certain angle, the lock can be switched to the zero state.

[0022] The above are all technical means that have been disclosed in the prior art, and are not the focus of improvement of the present invention. The main improvement of the present invention lies in the related structure between the operating component of the word wheel lock and the zeroing lever, and therefore the specific structure of the password component is not limited. That is, in actual applications, the present invention can also be applied to the word wheel lock that realizes the word wheel zeroing function in a non-magnetic way.

[0023] On this basis, reference Figure 1-20 As shown, the present invention discloses a zeroing mechanism for a character wheel lock, comprising a fixing seat 2 and an operating assembly which are installed in parallel in a character wheel lock housing 100; A zeroing lever 7 for switching the zeroing state of the character wheel lock is movably installed in the fixing seat 2; when the zeroing lever 7 moves axially relative to the fixing seat 2, the character wheel lock enters the zeroing state, and after the zeroing lever 7 is reset, the character wheel lock exits the zeroing state, and the character wheel 14 of the character wheel lock rotates to reset in the zeroing state; A first stopper 9 and a first spring 10 are provided between the operating assembly and the return-to-zero lever 7. The first stopper 9 is slidably fitted in the fixing seat 2 along a direction perpendicular to the axis of the return-to-zero lever 7. The first spring 10 is provided between the first stopper 9 and the fixing seat 2 or the wheel lock housing 100. The circumferential surface of the operating assembly is provided with a zeroing boss 81 and a linkage boss 82; the zeroing boss 81 is arranged opposite to the end of the zeroing lever 7, and when the zeroing boss 81 abuts against the zeroing lever 7, the zeroing lever 7 is driven to move axially so that the character wheel lock enters the zeroing state; the linkage boss 82 is arranged opposite to the first stopper 9, and when the linkage boss 82 abuts against the first stopper 9, the first stopper 9 is driven to compress the first spring 10; A limiting protrusion 71 is disposed on the side surface of the end of the return-to-zero lever 7, and the first stopper 9 is provided with a limiting stopper 91 opposite to the limiting protrusion 71, and the limiting protrusion 71 and the limiting stopper 91 limit each other: see Fig.10 In the locked state, the limiting protrusion 71 limits the limiting block 91 so that the first block 9 remains in the state of compressing the first spring 10; see Fig.11 In the unlocked state, the limit stopper 91 limits the limit projection 71 to prevent the zeroing lever 7 from resetting, and the character wheel lock remains in the zeroing state.

[0024] According to the above scheme, the present invention sets a first stopper 9 and a first spring 10 between the operating assembly of the word wheel lock and the zero return lever 7, and the limit protrusion 71 of the zero return lever 7 and the limit stopper 91 of the first stopper 9 are mutually limited. In particular, in the unlocked state, when the zero return boss 81 pushes the zero return lever 7 to move axially and releases the limit protrusion 71 from limiting the limit stopper 91, the limit stopper 91 can be bounced up under the action of the first spring 10 so that the limit stopper 91 blocks the limit protrusion 71 to achieve the limit stopper 91 on the limit The limiting of the protrusion 71 can prevent the reset of the zeroing lever 7. At this time, the word wheel lock can be kept in the zeroing state, so that the word wheel 14 of the word wheel lock has a long enough time to perform the "word wheel zeroing" function, ensuring that all word wheels 14 of the word wheel lock can be reset to zero, eliminating the hidden danger of password leakage; and in the locking process, the linkage boss 82 of the operating component can be linked with the first stopper 9 to restore it to the state of compressing the first spring 10, that is, the limiting stopper 91 releases the limiting of the limiting protrusion 71, and the zeroing lever 7 can be reset and the word wheel lock exits the zeroing state.

[0025] The specific implementation of the character wheel zeroing mechanism of the character wheel lock is shown below.

[0026] The above-mentioned operating component is the lock core tail 8 of the word wheel lock, and the lock core tail 8 is linked with the knob 3 of the word wheel lock to achieve synchronous rotation.

[0027] The zeroing boss 81 and the linkage boss 82 are staggered in the circumferential direction of the operating assembly, that is, the angles of the two are different, so that the contact time of the two pairs of structures, the zeroing boss 81 and the zeroing lever 7, and the linkage boss 82 and the first stopper 9, are different, avoiding mutual interference between the functions.

[0028] See also Fig. 20The fixing seat 2 is provided with a guide groove 21 for slidingly engaging with the first stopper 9 , which is used to install the first stopper 9 and guide the sliding direction of the first stopper 9 .

[0029] A linkage inclined surface 821 is provided below the side surface of the linkage boss 82, and a protrusion 92 is provided on the side of the first stopper 9 facing the operating component. The linkage inclined surface 821 and the protrusion 92 are movably matched to realize the linkage between the linkage boss 82 and the first stopper 9. When the operating component rotates and the protrusion 92 contacts the linkage inclined surface 821, the linkage inclined surface 821 presses the protrusion 92 downward so that the first stopper 9 compresses the first spring 10.

[0030] See also Figure 2 , 12 13. The upper surface of the fixing seat 2 is covered with a panel 4, and a movable hole 41 is provided on the panel 4; a button 20 is movably fitted in the movable hole 41; the button 20 is arranged opposite to the first stopper 9, and the button 20 and the first spring 10 are located at the upper and lower sides of the first stopper 9, and are used to drive the first stopper 9 to compress the first spring 10. Fig.13 By actively pressing the button 20, the user can actively release the limit of the first stop block 9 on the zeroing lever 7, so that the character wheel lock can quickly exit the zeroing state.

[0031] Furthermore, the button 20 is hooked on the inner wall edge of the movable hole 41 through a plurality of hooks 201 to prevent the button 20 from being separated from the panel 4 .

[0032] At the same time, a driving block 30 is arranged between the above-mentioned 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 seat 2, mainly to achieve the linkage between the two; a reset spring 40 is arranged between the driving block 9 and the fixed seat 2, which is used to drive the driving block 9 and link the button 20 for reset.

[0033] See also Figure 1 The present invention also discloses a character wheel lock, including the character wheel zeroing mechanism of the character wheel lock, and thus also has the corresponding technical effect of the character wheel zeroing mechanism.

[0034] As mentioned above, the wheel lock has a "wheel reset" function and can keep the wheel lock in a reset state for a long time during the unlocking process. In addition, when some applications have more functional requirements for wheel lock products, such as wheel locks used in public lockers, each password set by the user is a one-time use, so the merchant hopes that the lock can automatically "reset the password" after unlocking, that is, the lock can automatically change the password to a preset password to initialize the lock without the user's operation. To this end, the present invention can also be improved on the basis of the above technical solution so that the wheel lock has a temporary mode, that is, each password set is a one-time use, and is automatically reset to the initial password after unlocking.

[0035] See also Figure 14-19 The word wheel lock with temporary mode also includes a retaining frame 11, a second stopper 50 and a second spring 60; a code-changing groove 83 for the end of the retaining frame 11 to flexibly cooperate is arranged on the circumferential surface of the operating assembly; the second stopper 50 is arranged in the code-changing groove 83 to block the movement of the end of the retaining frame 11, and the second spring 60 is located between the second stopper 50 and the side wall of the code-changing groove 83; a compression inclined surface 501 is arranged on one side of the second stopper 50, so that the end of the retaining frame 11 can push the second stopper 50 to compress the second spring 60 when the end of the retaining frame 11 contacts the second stopper 50 on this side, so that when the operating assembly rotates, the retaining frame 11 will not be blocked by the second stopper 50 to avoid interfering with the rotation of the operating assembly; in the circumferential direction of the operating assembly, the two ends of the zeroing boss 81 are respectively located on the inner sides of the two ends of the code-changing groove 83.

[0036] The unlocking principle of temporary mode is: ① When the operating assembly rotates in the unlocking direction, the end of the retainer 11 first enters the code changing groove 83 to make the word wheel lock enter the code changing state (see Fig.16 ); ② The operating assembly continues to rotate, and the zeroing lever 7 contacts the zeroing boss 81 to put the character wheel lock into the zeroing state (see Fig.17 ), the superposition of the code change state and the zero return state makes the password of the word wheel lock automatically reset to the preset password (generally referred to as the initial password), completing the initialization of the password; ③ The operating assembly continues to rotate, and the end of the retaining frame 11 squeezes the second stopper 50 to compress the second spring 60 until the unlocking is completed. If the user needs to change the password, the operation can be performed at this time (if not, the lock will keep the preset password): the user presses the button 20 on the panel 4, and the button 20 pushes the driving block 30 to act on the first stopper 9. The first stopper 9 compresses the first spring 10 to release the limit on the zeroing lever 7. The zeroing lever 7 is ejected, and the anti-rotation buckle 61 falls into the anti-rotation groove 141 of the character wheel 14. The character wheel 14 no longer rotates, and the user can change the password by turning the character wheel 14.

[0037] The locking principle of temporary mode is as follows (this is mainly explained on the premise that the user has changed the password of the lock after resetting the password): When the operating assembly rotates in the locking direction, the end of the retainer 11 first passes through the climbing slope 502 of the second stopper 50 when returning; when the end of the retainer 11 abuts against the curved surface 503 of the second stopper 50, the number displayed on the outside of the panel 4 is still the password set by the user; when the retainer 11 climbs to the curved surface 503, the zeroing boss 81 contacts the zeroing lever 7 again (see Fig.19 ), the wheel lock starts to enter the zeroing state again, and the anti-rotation buckle 61 is separated from the anti-rotation groove 141 of the wheel 14; with the rotation of the operating component, when the zeroing lever 7 completely passes through the zeroing boss inclined surface 811, the wheel lock completes the wheel zeroing, that is, the wheel zeroing function after the user changes the password is realized. Since the number displayed by the wheel lock after zeroing is different from the password changed by the user, the yielding groove 131 of the bushing 13 and the locking protrusion 121 of the lock shaft 12 are misaligned, so that the retainer 11 of the wheel lock cannot fall into the code changing groove 83, that is, the wheel lock will not enter the code changing state.

[0038] Of course, if the user does not change the password after resetting the password, the above locking principle still holds true, except that the character wheel 14 will no longer rotate because it is already in a state of magnetic balance.

[0039] In the temporary mode, a climbing slope 502 is provided on the other side of the second stopper 50 for pushing the retaining frame 11 to reset so that the code wheel lock exits the code changing state.

[0040] In the temporary mode, a sliding groove 831 is provided in the code changing groove 83 for the second stopper 50 to slide with.

[0041] The usage scenarios of the above temporary mode can be: (1) After the previous user unlocks the lock, the lock automatically resets the password to the initial password, and the user uses the initial password to unlock the lock; (2) The cabinet door is open. If the current user needs to use the cabinet, he can change the password to a new one by pressing button 20 and then close the door. If the user does not change the password, the password will remain the initial password when the door is closed. (3) Afterwards, the user needs to use the correct password to unlock the door and reset the password again. If the user changes the password by mistake and closes the door (that is, the user does not know what password he changed) or forgets the password, the administrator key can be used to unlock the door or find the code.

[0042] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A character wheel zeroing mechanism of a character wheel lock, characterized in that: It includes a fixing seat and an operating assembly which are installed in parallel in the housing of the wheel lock; A zeroing lever for switching the zeroing state of the character wheel lock is movably installed in the fixing seat; A first stopper and a first spring are arranged between the operating assembly and the return-to-zero lever, the first stopper is slidably fitted in the fixing seat, and the first spring is arranged between the first stopper and the fixing seat or the wheel lock housing; The circumferential surface of the operating assembly is provided with a zeroing boss and a linkage boss; the zeroing boss is arranged opposite to the end of the zeroing lever, and when the zeroing boss abuts against the zeroing lever, the zeroing lever is driven to move axially so that the character wheel lock enters the zeroing state; the linkage boss is arranged opposite to the first stop block, and when the linkage boss abuts against the first stop block, the first stop block is driven to compress the first spring; A limiting protrusion is provided on the side surface of the end of the return-to-zero lever, and the first stop block is provided with a limiting stop block opposite to the limiting protrusion, and the limiting protrusion and the limiting stop block limit each other: in the locked state, the limiting protrusion limits the limiting stop block so that the first stop block keeps the first spring in a compressed state; in the unlocked state, the limiting stop block limits the limiting protrusion to prevent the return-to-zero lever from resetting, and the word wheel lock keeps the return-to-zero state.

2. The character wheel zeroing mechanism of the character wheel lock according to claim 1, characterized in that: The operating component is the lock core tail of the wheel lock.

3. The character wheel zeroing mechanism of the character wheel lock according to claim 1, characterized in that: The zero return boss and the linkage boss are staggered in the circumferential direction of the operating component.

4. The character wheel zeroing mechanism of the character wheel lock according to claim 1, characterized in that: A guide groove for sliding cooperation of the first stopper is arranged in the fixing seat.

5. The character wheel zeroing mechanism of the character wheel lock according to claim 1, characterized in that: A linkage inclined surface is arranged below the side surface of the linkage boss, a protrusion is arranged on a side of the first stopper facing the operating component, and the linkage inclined surface and the protrusion are movably matched to realize the linkage between the linkage boss and the first stopper.

6. The character wheel zeroing mechanism of the character wheel lock according to claim 1, characterized in that: The upper surface of the fixing seat is covered with a panel, and a movable hole is arranged on the panel; a button is movably fitted in the movable hole; the button is arranged opposite to the first stopper, and the button and the first spring are located at the upper and lower sides of the first stopper, and are used to drive the first stopper to compress the first spring.

7. The character wheel zeroing mechanism of the character wheel lock according to claim 6, characterized in that: The button is hooked on the inner wall edge of the movable hole through a plurality of hooks.

8. The character wheel zeroing mechanism of the character wheel lock according to claim 6, characterized in that: A driving block is arranged between the button and the first stop block; and a return spring is arranged between the driving block and the fixing seat.

9. A character wheel lock, comprising the character wheel zeroing mechanism of the character wheel lock as claimed in any one of claims 1 to 8.

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