Mechanical password lock with dial unlocking reset

Abstract

The application discloses a mechanical password lock with dial wheel unlocking reset, and belongs to the technical field of locks. In the unlocking or locking state, the dial wheels can be freely forward or reverse rotated. When the dial wheel password is incorrect after locking, the lock shell cannot be rotated, and even if external force is knocked, the unlocking cannot be realized. When all the dial wheel passwords are correct, the lock shell is rotated, the unlocking lever is pushed to move rightwards, and the unlocking is realized. Then, the lock shell is reversely rotated, the unlocking lever is extruded and moves downwards, moves upwards again after passing the unlocking lever, and is reset, and the locking is realized. The unlocking process can be operated under any password combination. The correct password is not changed, and the dial wheel is reset to, for example, "xxxx" to prevent the correct password from being leaked. The application is suitable for the application scene that a consumer uses a certain space for a long time, that is, the password can be set once and used multiple times. The dial wheel reset mechanism is adopted to realize the dial wheel reset in the unlocking process, the password is automatically hidden after unlocking, and the risk of password leakage caused by manual dialing forgotten by a user is avoided.

Description

Technical Field

[0001] This application relates to the field of combination lock technology, and in particular to a mechanical combination lock with a digit wheel that unlocks and resets. Background Technology

[0002] Mechanical combination locks with digit-based unlocking and resetting mechanisms combine the convenience of electronic locks with the stability of key-operated mechanical locks, making them widely used in the market. However, some existing mechanical combination locks with digit-based unlocking and resetting mechanisms lack an integrated automatic reset function. In both unlocked and locked states, the digits often remain in the correct combination position, requiring the user to manually scramble the combination to prevent leakage. This operation relies on user habit, and negligence can easily lead to password disclosure, posing a significant security risk.

[0003] Therefore, there is an urgent need for a combination lock that can automatically reset during the unlocking process and allows for multiple uses of a single code. Summary of the Invention

[0004] This application provides a mechanical combination lock with a digit wheel that automatically resets upon unlocking. This solves the problem in the prior art of needing a combination lock that can automatically reset during unlocking and allows for multiple uses of a single combination code. The technical solution is as follows:

[0005] On the one hand, a mechanical combination lock with a digit wheel unlocking and resetting mechanism is provided, the mechanical combination lock with a digit wheel unlocking and resetting mechanism includes: a lock case, a switch locking component, a digit wheel combination mechanism and a digit wheel resetting mechanism;

[0006] The lock housing has a latch, and the inner wall of the lock housing has a lifting sliding position, at which the lock switch can slide up and down;

[0007] The digit combination mechanism is located inside the lock housing and includes: a digit wheel frame, an unlocking lever, an elastic element, at least two splines, and at least two digit wheels that correspond one-to-one with the at least two splines; the digit wheel frame is fastened to the cabinet door; the unlocking lever is horizontally positioned and slidably connected to the digit wheel frame; the first end of the unlocking lever engages with the lock switch; both ends of the elastic element contact the second ends of the digit wheel frame and the unlocking lever, respectively; each spline is slidably fitted onto the unlocking lever and has a keyway; the side of the unlocking lever has a locking protrusion that engages with each keyway;

[0008] The character wheel reset mechanism is connected to each character wheel and the lock housing;

[0009] In the mechanical combination lock with digit wheel unlocking and resetting mechanism, when the lock is in the locked state, the first end of the unlocking lever is located between the lock switch and the unlocking position. When switching from the locked state to the unlocking state, the digit wheel is moved to rotate the spline to the target position so that the keyway is axially aligned with the locking protrusion, releasing the movement restriction of the unlocking lever. The lock case rotates along the first rotation direction, and the lock switch pushes the first end of the unlocking lever to move past the first end of the unlocking lever to reach the unlocking position. At the same time, the digit wheel resetting mechanism drives each digit wheel to rotate. After reaching the unlocking position, multiple digit wheels are in the preset target position. The elastic element pushes the second end of the unlocking lever to move and reset after the lock switch slides past the first end of the unlocking lever. When switching from the unlocking state to the locked state, the lock case rotates along the second direction until the lock switch contacts the first end of the unlocking lever and then slides down. It can also move up to reset after sliding past the first end of the unlocking lever. At the same time, the digit wheel resetting mechanism moves to the initial position, with the first and second rotation directions being opposite.

[0010] Optionally, the switch lock member has an unlocking ramp parallel to the axial direction of the lock housing on the side facing the unlocking position, and the first end of the unlocking rod has a first wedge surface that cooperates with the unlocking ramp; the switch lock member has a locking ramp intersecting with the axial direction of the lock housing on the side away from the lock position, and the locking ramp is inclined toward the unlocking ramp, and the first end of the unlocking rod has a second wedge surface that cooperates with the locking ramp.

[0011] Optionally, the lifting sliding position of the lock housing has a groove, the extension direction of the groove being parallel to the axial direction of the lock housing; the switch lock component includes: a switch lock slider and a first elastic element, the first elastic element being located in the groove and one end being connected to the bottom of the groove, a portion of the switch lock slider extending into the groove and connected to the other end of the first elastic element, and the other portion of the switch lock slider cooperating with the unlocking rod.

[0012] Optionally, the character wheel reset mechanism includes: at least two synchronizing elements, at least two transmission elements, and at least two drive ropes corresponding to at least two character wheels. The synchronizing elements are synchronously rotated and connected to the corresponding character wheels. The transmission elements are driven and connected to the corresponding synchronizing elements. One end of the drive rope is fastened to the lock housing, and the other end is fastened to the corresponding transmission element.

[0013] Specifically, when the digit wheel reset mechanism is in its initial position, the drive rope is in a bent state. During the unlocking process, the drive rope is tensioned and drives the synchronous component to rotate through the transmission component, thereby driving the corresponding digit wheel to rotate. During the locking process, the drive rope switches from a tensioned state to a bent state, and the digit wheel remains stationary.

[0014] Optionally, the synchronizing element includes a gear fastened to the type wheel, and the transmission element includes a reset gear meshing with the gear, the reset gear being rotatably connected to the type wheel frame; the other end of the drive rope is fastened to the edge of the reset gear.

[0015] When one end of the drive rope moves with the lock case to the unlocked position, the other end of the drive rope rotates to the lowest position of the reset gear.

[0016] Optionally, the transmission component further includes: a first steering pulley and a second steering pulley rotatably connected to the character wheel frame. The first steering pulley is located below the reset gear and its axis is parallel to the axis of the reset gear. The second steering pulley is adjacent to the first steering pulley, and the axis of the second steering pulley is perpendicular to the axis of the first steering pulley.

[0017] Optionally, the mechanical combination lock with digit unlocking and resetting further includes a combination modification mechanism, which includes a limiting boss fixed on the inner wall of the lock housing, a cover plate located inside the lock housing, and a second elastic member. The second elastic member is sleeved on the unlocking rod and close to the second end of the cover plate. The two ends of the second elastic member are respectively in contact with the digit wheel frame and the outermost spline. The cover plate has at least two sleeve portions corresponding to at least two splines and slidably sleeved on the unlocking rod, and through slots corresponding to at least two digit wheels. A portion of each digit wheel extends out from the corresponding through slot.

[0018] In the locked state, each digit wheel is rotated to the target position by driving the spline. The lock case is rotated in the second rotation direction until the cover plate contacts the limiting boss. The limiting boss pushes the first end of the cover plate to move, which in turn drives the spline to move through each socket and separates from the corresponding digit wheel along the axial direction of the unlocking rod. At the same time, the second elastic element is compressed. After changing the password by turning the digit wheel, the lock case is rotated in the first rotation direction until the cover plate separates from the limiting boss. Under the reaction force, the second elastic element pushes the outermost spline and multiple sockets to move in the opposite direction, so as to push each spline to re-engage with the corresponding digit wheel.

[0019] Optionally, the mechanical combination lock with digit unlocking and reset further includes an emergency password finding mechanism, which includes a key, a wafer lock, a bracket, a moving drive component, and at least two locking spline pins. The wafer lock is fixed inside the lock housing. The extension direction of the bracket is parallel to the arrangement direction of the multiple splines. The at least two locking spline pins correspond one-to-one with at least two splines and are slidably connected to the bracket in the vertical direction. The moving drive component is located at the bottom of the bracket and is drivenly connected to the bottom of each locking spline pin.

[0020] Each spline includes: an engaging portion that mates with a number wheel and a sleeve portion that sleeves with an unlocking lever, wherein the circumferential side of the sleeve portion has a notch;

[0021] When searching for the password, the key is inserted into the leaf lock and the key is turned to drive the moving drive component to move horizontally, which in turn drives each locking spline column to move upward until its top abuts against the outer side of the sleeve. As different number wheels are turned in sequence to drive the spline to rotate, if the top of the locking spline column slides into the notch, the correct password is confirmed. After searching for the password, the key is turned in the opposite direction to drive the moving drive component to move horizontally in the opposite direction, which in turn drives each locking spline column to move downward until its top separates from the notch.

[0022] Optionally, the spline post includes: a telescopic rod, a mounting base, a first return spring, and a second return spring. The mounting base is slidably connected to the bracket and has a telescopic space. The mounting base is drively connected to a moving drive component. The bottom of the telescopic rod is slidably connected within the telescopic space, and the top of the telescopic rod extends out of the telescopic space and engages with the sleeve portion. The first return spring is located within the telescopic space, and its two ends contact the bottom of the telescopic rod and the bottom wall of the telescopic space, respectively. The two ends of the second return spring contact the edge portions of the bracket and the mounting base, respectively.

[0023] Optionally, the moving drive component has a first driving ramp, and the bottom of the corresponding spline post has a second driving ramp that cooperates with the first driving ramp; wherein, when the moving drive component moves, the spline post is driven to move upward by the cooperation of the first driving ramp and the second driving ramp.

[0024] The beneficial effects of the technical solutions provided in this application include at least the following:

[0025] (1) The combination lock adopts a pure mechanical structure. It can lock and unlock by simply rotating the lock shell. It does not require external or internal power sources or keys. It truly achieves a keyless and powerless security locking function. The pure mechanical structure has no electronic components, has strong anti-interference ability, and high stability. In the unlocked or locked state, the dial can be freely rotated forward and backward. When the dial is not correct after locking, the lock shell cannot be rotated. Even if it is hit by external force, it cannot be unlocked. In addition, to unlock, the unlocking lever must be moved to the right when multiple dials are correct. During the locking process, the lock shell is rotated in the opposite direction, and the switch lock piece is pressed down by the unlocking lever after contacting the first end of the unlocking lever. After passing the unlocking lever, it moves up to reset and locks. The unlocking lever does not need to move axially to the right. During the unlocking process, the correct password will not change. It only resets the dial to, for example, "xxxx" to prevent the correct password from being leaked. It is suitable for application scenarios where consumers use a certain space for a long time. That is, the password can be set once and used multiple times. The digit wheel reset mechanism enables the digit wheel to be reset during the unlocking process, which means that the password is automatically hidden after unlocking, thus fundamentally avoiding the risk of password leakage caused by users forgetting to manually dial the code.

[0026] (2) An innovative design incorporates multiple (four shown in the figure) independent card spline post assemblies, each corresponding to a different number wheel 35. This means that each number wheel 35 operates independently for finding the password, without interfering with each other. The lock can be opened from any number wheel to find the password, effectively solving the problem of interference between multiple number wheels in traditional password-finding mechanisms and improving the stability of the combination lock. It should be noted that when the correct password is in position, the notch in the sleeve faces vertically downwards for easy engagement with the telescopic rod. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the internal structure of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism in the locked state, provided in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism in the unlocked state, provided in an embodiment of this application.

[0032] Figure 5 This is a partial structural diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of a spline structure provided in an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the structure of an unlocking lever provided in an embodiment of this application;

[0035] Figure 8 yes Figure 7 A structural schematic diagram of the unlocking lever from another perspective is shown;

[0036] Figure 9 This is a schematic diagram of the structure of a switch lock provided in an embodiment of this application;

[0037] Figure 10This is a partial structural diagram of another mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application;

[0038] Figure 11 This is a schematic diagram of the state of a mechanical combination lock with a digit wheel unlocking and resetting mechanism under password change conditions, provided in an embodiment of this application.

[0039] Figure 12 This is a schematic diagram of the structure of a cover plate provided in an embodiment of this application;

[0040] Figure 13 This is a partial structural diagram of another mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in this application embodiment;

[0041] Figure 14 This is a schematic diagram of a structure for finding the password bit provided in an embodiment of this application;

[0042] Figure 15 This is a schematic diagram of the structure of the moving drive provided in the embodiments of this application;

[0043] Figure 16 This is a partial structural diagram of a cryptographic retrieval mechanism provided in an embodiment of this application;

[0044] Figure 17 This is a partial structural diagram of another cryptographic mechanism provided in an embodiment of this application;

[0045] Figure 18 This is a schematic diagram of the structure of a bracket provided in an embodiment of this application;

[0046] Figure 19 This is a partial structural cross-sectional view of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application;

[0047] Figure 20 This is a schematic diagram of the structure of a key lock shell provided in an embodiment of this application.

[0048] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0051] Please refer to Figures 1 to 20 , Figure 1 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application. Figure 2 This is a schematic diagram of the internal structure of a mechanical combination lock with a digit wheel unlocking and resetting mechanism, provided in an embodiment of this application. Figure 3 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism in the locked state, provided in an embodiment of this application. Figure 4 This is a schematic diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism in the unlocked state, provided in an embodiment of this application. Figure 5 This is a partial structural diagram of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application. Figure 6 This is a schematic diagram of a spline structure provided in an embodiment of this application. Figure 7 This is a schematic diagram of the structure of an unlocking lever provided in an embodiment of this application. Figure 8 yes Figure 7 The diagram shows another view of the unlocking lever. Figure 9 This is a schematic diagram of the structure of a switch lock provided in an embodiment of this application. Figure 10 This is a partial structural diagram of another mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application. Figure 11 This is a schematic diagram illustrating the state of a mechanical combination lock with a digit wheel unlocking and resetting mechanism under password change conditions, provided in an embodiment of this application. Figure 12 This is a schematic diagram of the structure of a cover plate provided in an embodiment of this application. Figure 13 This is a partial structural diagram of another mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application. Figure 14 This is a schematic diagram of a structure for finding the password bit provided in an embodiment of this application. Figure 15 This is a schematic diagram of the structure of the moving drive component provided in the embodiments of this application. Figure 16 This is a partial structural diagram of a cryptographic retrieval mechanism provided in an embodiment of this application. Figure 17 This is a partial structural diagram of another cryptographic mechanism provided in an embodiment of this application. Figure 18 This is a schematic diagram of the structure of a bracket provided in an embodiment of this application. Figure 19 This is a partial structural cross-sectional view of a mechanical combination lock with a digit wheel unlocking and resetting mechanism provided in an embodiment of this application. Figure 20 This is a schematic diagram of the structure of a key lock shell provided in an embodiment of this application.

[0052] A mechanical combination lock with a digit wheel unlocking and resetting mechanism may include: a lock housing 10, a switch lock element 20, a digit wheel combination mechanism 30, and a digit wheel reset mechanism 40.

[0053] The lock housing 10 has a latch 11, and the inner wall of the lock housing 10 has a sliding position W, at which the switch lock member 20 can slide up and down. Here, the switch lock member 20 can be slidably connected relative to the lock housing at the sliding position W, and it rotates synchronously with the lock housing 10.

[0054] The digit combination mechanism 30 is located inside the lock housing 10 and includes: a digit wheel frame 31, an unlocking lever 32, an elastic element 33, at least two splines 34, and at least two digit wheels 35 that correspond one-to-one with the at least two splines 34. The digit wheel frame 31 is fastened to the cabinet door. The unlocking lever 32 is horizontally positioned and slidably connected to the digit wheel frame 31. The first end D1 of the unlocking lever 32 engages with the lock switch 20. The two ends of the elastic element 33 are respectively connected to the second end D2 of the digit wheel frame 31 and the unlocking lever 32. Each spline 34 is slidably sleeved on the unlocking lever 32 and has a keyway C1. The side of the unlocking lever 32 has a locking protrusion T1 that engages with each keyway C1.

[0055] The character wheel reset mechanism 40 is connected to each character wheel 35 and the lock housing 10.

[0056] In the case of a mechanical combination lock with a digit wheel unlocking and resetting mechanism, when the lock is in the locked state, the first end D1 of the unlocking lever 32 is between the lock switch 20 in the locked position and the unlock position W1 (here, the unlock position and the locked position are two fixed positions of the combination lock itself). When switching from the locked state to the unlocking state, the digit wheel 35 is moved to drive the spline 34 to rotate to the target position so that the keyway C1 and the locking protrusion T1 are aligned along the axial direction of the unlocking lever 32 to release the movement limit of the unlocking lever 32. The lock case 10 rotates along the first rotation direction, pushes the first end D1 of the unlocking lever 32 to move through the lock switch 20, and continues to rotate past the first end D1 of the unlocking lever 32 to reach the unlocking position. During the unlocking process, the digit wheel reset mechanism 40 is driven to drive each digit wheel 35 to rotate. After the lock case rotates to the unlocking position, multiple digit wheels 35 are in the preset target position. After the compressed elastic element 33 slides past the first end of the unlocking lever 32, it pushes the second end D2 of the unlocking lever 32 to move and reset. When switching from the unlocked state to the locked state, the lock case 10 rotates along the second direction until the lock element 20 contacts the first end D1 of the unlocking lever 32 and then slides downward. It can also move upward and reset after sliding past the first end D1 of the unlocking lever 32. At the same time, the digit wheel reset mechanism 40 moves to its initial position. The first rotation direction and the second rotation direction are opposite. It should be noted that the digit wheel 35 will not rotate during the process of the digit wheel reset mechanism 40 moving to its initial position. Here, the first rotation direction can be clockwise, and the second rotation direction can be counterclockwise.

[0057] For example, when a mechanical combination lock with the digits unlocked and resets switches from the locking to the unlocking process, the user rotates each digit wheel 35, causing the digit wheel 35 to rotate the corresponding spline 34 by a certain angle until the key groove C1 in the spline 34 aligns with the locking protrusion T1 on the unlocking lever 32; the lock case 10 is rotated along the first rotation direction, and the switch lock member 20 pushes the unlocking lever 32 to move to the right so that the switch lock member 20 slides past the first end D1 of the unlocking lever 32; under the action of the elastic member 33, the unlocking lever 32 moves in the opposite direction; when the mechanical combination lock with the digits unlocked and resets switches from the unlocking to the locking process, the lock case 10 is rotated along the second rotation direction, and the switch lock member 20 rotates at the same time with the lock case 10 by a certain angle and slides down after contacting the first end D1 of the unlocking lever 32, and can rise to limit the first end D1 of the unlocking lever 32 after sliding past the first end D1 of the unlocking lever 32, thus ensuring that the first end D1 of the unlocking lever 32 can slide past the switch lock member 20 to achieve locking.

[0058] In this embodiment, the combination lock adopts a purely mechanical structure. Locking and unlocking functions can be achieved simply by rotating the lock case. No external or internal power source is required, nor is a key needed for unlocking. This truly achieves a keyless, powerless security locking function. The purely mechanical structure has no electronic components, resulting in strong anti-interference capabilities and high stability. In both locked and unlocked states, the dials can freely rotate forward and backward. When locked, if the combination on the dial 35 is incorrect, the lock case cannot rotate, and even external force cannot unlock it. Furthermore, to unlock, the unlocking lever 32 must move to the right when multiple dials 35 contain the correct combination. During locking, the lock case 10 rotates in the opposite direction, causing the locking switch 20 to contact the first end of the unlocking lever 32. The locking switch 20 is then pressed down by the unlocking lever 32, moves past it, and then moves back up to reset, thus locking. The unlocking lever 32 does not need to move axially to the right. During the unlocking process, the correct password remains unchanged; instead, the dial is reset to a value such as "xxxx" to prevent the correct password from being leaked. This is suitable for applications where consumers use a specific space for extended periods, meaning the password can be set once and used multiple times. The dial reset mechanism allows the dial to be reset during unlocking, automatically hiding the password after unlocking and fundamentally avoiding the risk of password leakage due to users forgetting and manually dialing the code.

[0059] In summary, this application provides a mechanical combination lock with a digit wheel unlocking and resetting mechanism, which may include: a lock shell, a switch locking component, a digit wheel combination mechanism, and a digit wheel resetting mechanism. The lock employs a purely mechanical structure; simply rotating the lock shell is sufficient to achieve locking and unlocking functions. It requires no external or internal power source and no key for unlocking, truly achieving keyless and power-free security locking. The purely mechanical structure has no electronic components, resulting in strong anti-interference capabilities and high stability. In both locked and unlocked states, the digit wheel can freely rotate forward and backward. When the digit wheel combination is incorrect after locking, the lock shell cannot rotate, and even external force cannot unlock it. Furthermore, to unlock, the unlocking lever must move to the right when multiple digit wheel combinations are correct. During locking, the reverse rotation of the lock shell causes the switch locking component to contact the first end of the unlocking lever. The switch locking component is then pressed down by the unlocking lever, moves past the unlocking lever, and then moves back up to reset, thus achieving locking. The unlocking lever does not need to move axially to the right. During the unlocking process, the correct password remains unchanged; instead, the dial is reset to a value such as "xxxx" to prevent the correct password from being leaked. This is suitable for applications where consumers use a specific space for extended periods, meaning the password can be set once and used multiple times. The dial reset mechanism allows the dial to be reset during unlocking, automatically hiding the password after unlocking and fundamentally avoiding the risk of password leakage due to users forgetting and manually dialing the code.

[0060] For example, such as Figure 2As shown, the mechanical combination lock with digit wheel unlocking and resetting may also include: a mounting base 50 for fastening to the cabinet door, the mounting base 50 can be sleeved on the lock tongue 11, the lock tongue 11 can rotate relative to the mounting base 50, and the digit wheel frame 31 can be fixed on the mounting base 50.

[0061] Optional, such as Figures 3 to 9 As shown, the lock switch 20 has an unlocking ramp m1 parallel to the axial direction of the lock housing 10 on the side facing the unlock position W1, and the first end D1 of the unlocking rod 32 has a first wedge surface m2 that engages with the unlocking ramp m1; the lock switch 20 has a locking ramp m3 intersecting the axial direction of the lock housing 10 on the side away from the lock position W1, and the locking ramp m3 is inclined towards the unlocking ramp m1, and the first end D1 of the unlocking rod 32 has a second wedge surface m4 that engages with the locking ramp m3. In this case, during the process of switching from locking to unlocking, the lock housing 10 is rotated in the first rotation direction, and the first wedge surface m2 of the unlocking rod 32 contacts the unlocking ramp m1 of the lock switch 20, and moves to the right to unlock after being squeezed. It should be noted that the unlocking rod 32 can only move to the right and the lock switch 20 can only slide past the first end D1 of the unlocking rod 32 if the locking protrusion T1 on the unlocking rod 32 is fully aligned with the keyway C1 on each spline 34. When transitioning from the unlocked state to the locked state, the lock housing 10 rotates in the second rotation direction. After the second wedge surface m4 of the unlocking rod 32 contacts the locking inclined surface m3 of the switch lock 20, the switch lock 20 is pressed down. In this way, the unlocking rod 32 can return to the locked position without moving to the right to achieve locking.

[0062] In this application, as Figure 4 and Figure 9 As shown, the lifting sliding position W of the lock housing 10 has a groove C2, and the extending direction of the groove C2 is parallel to the axial direction of the lock housing 10. The switch lock component 20 includes: a switch lock slider 21 and a first elastic member 22. The first elastic member 22 is located in the groove C2 and one end is connected to the bottom of the groove C2. A portion of the switch lock slider 21 extends into the groove C2 and is connected to the other end of the first elastic member 22. The other portion of the switch lock slider 21 cooperates with the unlocking rod 32. Here, the switch lock slider 21 may be provided with an unlocking ramp m1 and a locking ramp m3. For example, the switch lock slider 21 can slide up and down along the extending direction of the groove C2, and after the first end of the unlocking rod 32 presses down on the switch lock slider 21, the switch lock slider 21 can move upward to the initial position under the reaction action of the compressed first elastic member 22. For example, the first elastic member 22 can be a spring or a spring sheet, etc.

[0063] Optional, such as Figures 2 to 10As shown, the digit wheel reset mechanism 40 includes: at least two synchronizing members 41 corresponding to at least two digit wheels 35, at least two transmission members 42, and at least two drive ropes 43. The synchronizing members 41 are synchronously rotated and connected to the corresponding digit wheels 35, the transmission members 42 are drively connected to the corresponding synchronizing members 41, one end of the drive rope 43 is securely connected to the lock housing 10, and the other end of the drive rope 43 is securely connected to the corresponding transmission member 42. When the digit wheel reset mechanism 40 is in its initial position, the drive rope 43 is in a bent state. During the unlocking process, the drive rope 43 is tensioned and drives the synchronizing members 41 to rotate via the transmission members 42, thereby rotating the corresponding digit wheels 35. During the locking process, the drive rope 43 switches from a tensioned state to a bent state, and the digit wheels 35 remain stationary. In this case, a transmission method combining the flexible rope 43 with the rigid transmission members 42 and synchronizing members 41 is used. The rope traction drives the synchronizing members, ultimately driving the digit wheels to accurately reset. This design utilizes the flexibility of the rope to adapt to complex paths and limited space.

[0064] In the embodiments of this application, such as Figures 2 to 10 As shown, the synchronizing element 41 includes a gear K1 that is fastened to the digit wheel 35, and the transmission element 42 includes a reset gear K2 that meshes with the gear K1. The reset gear K2 is rotatably connected to the digit wheel frame 31. The other end of the drive rope 43 is fastened to the edge of the reset gear K2. When one end of the drive rope 43 moves with the lock housing 10 to the unlocked position, it drives the reset gear K2 to rotate, and the connection between the other end of the drive rope 43 and the reset gear K2 is at its lowest position. This utilizes a transmission method combining a flexible rope and a rigid gear. By traction of the rope to drive the gear system, the digit wheel is ultimately driven to precisely reset. This design utilizes the flexibility of the rope to adapt to complex paths and limited space, while using gear transmission to ensure the accuracy and reliability of the action, achieving a stable and precise automatic reset function. For example, the edge of the reset gear K2 is fixed with a rope-binding post Z1 connecting to the other end of the drive rope 43, and the bottom of the lock housing is fixed with a rope-looping post Z2 connecting to one end of the drive rope 43.

[0065] In this application, the mechanical combination lock with digit unlocking and resetting shown in this application is provided with four digit wheels 35. The reset gear K2 and drive rope 43 corresponding to the adjacent first and second digit wheels 35 are located in one side area of ​​the digit wheel combination mechanism 30 in the lock case 10, and the reset gear K2 and drive rope 43 corresponding to the adjacent third and fourth digit wheels 35 are located in the other side area of ​​the digit wheel combination mechanism 30 in the lock case 10.

[0066] Optional, please refer to Figure 10The transmission component 42 further includes a first directional pulley K3 and a second directional pulley K4 rotatably connected to the digit wheel frame 31. The first directional pulley K3 is located below the reset gear K2, and its axis is parallel to the axis of the reset gear K2. The second directional pulley K4 is adjacent to the first directional pulley K3, and its axis is perpendicular to the axis of the first directional pulley K3. In this way, by presetting the winding direction of the drive ropes through the two directional pulleys, it is ensured that the various drive ropes 43 will not interfere with each other, and a stable drive is achieved for the reset gear K2. In addition, after the user completes the password input and rotates the lock case 10 to unlock, the drive ropes inside the lock drive the reset gear, gears and digit wheels in sequence, realizing the reset of all digit wheels (the four digit wheels display 0000). The operation is simple and does not require the user to manually shuffle the digit wheels to prevent password leakage.

[0067] In this application, as Figure 2 , Figure 11 and Figure 12 As shown, the mechanical combination lock with digit wheel unlocking and resetting also includes a combination mechanism 60, which may include: a limiting boss 61 fixed on the inner wall of the lock housing 10, a cover plate 62 located inside the lock housing 10, and a second elastic member 63. The second elastic member 63 is sleeved on the unlocking lever 32 and close to the second end of the cover plate 62. The two ends of the second elastic member 63 respectively contact the digit wheel frame 31 and the outermost spline 34. The cover plate 62 has at least two sleeve portions 621 corresponding to at least two splines 34 and slidably sleeved on the unlocking lever 32, and through slots 622 corresponding one-to-one with at least two digit wheels 35. A portion of each digit wheel 35 protrudes from the corresponding through slot 622. In the locked state, multiple number wheels 35 drive the splines 34 to rotate to the target position. The lock case 10 is rotated along the second rotation direction until the cover plate 62 contacts the limiting boss 61. The limiting boss 61 pushes the first end of the cover plate 62 to move, which in turn drives the splines 34 to move and separate from the corresponding number wheels 35 along the axial direction of the unlocking rod 32 through each sleeve part 621. At the same time, the second elastic member 63 is compressed. After changing the password by turning the number wheels 35, the lock case 10 is rotated along the first rotation direction until the cover plate 62 separates from the limiting boss 61. Under the reaction force, the second elastic member 63 pushes the outermost spline 34 and multiple sleeve parts 621 to move in the opposite direction so that the multiple splines 34 and the number wheels 35 re-engage.

[0068] In this configuration, with the lock in the locked position, each dial 35 descends to the correct combination position. The lock case 10 rotates slightly in the opposite direction, causing the limiting boss 61 on the lock case 10 to drive the cover plate 62 to move, simultaneously disengaging each spline 34 from the dial 35. After setting the combination, rotating the lock case 10 in the first rotational direction separates the limiting boss 61 from the first end of the cover plate 62. Simultaneously, under the action of the compressed second elastic element 63, the splines 34 and cover plate 62 are pushed to move in the opposite direction until the splines 34 engage with the dial 35. In other words, the entire lock is composed entirely of mechanical components and does not rely on electricity or other external energy sources. In the locked position, the user does not need a key; after entering the correct combination, simply rotating the lock case slightly in the opposite direction resets the combination. Returning to the locked position in the forward direction completes the combination change, making the operation simple.

[0069] Optional, such as Figures 13 to 17 As shown, the mechanical combination lock with digit wheel unlocking and reset also includes an emergency combination finding mechanism 70. This mechanism 70 includes a key 71, a wafer lock 72, a bracket 73, a moving drive component 74, and at least two locking spline pins 75. The wafer lock 72 is fixed inside the lock housing 10. The extending direction of the bracket 73 is parallel to the arrangement direction of the multiple splines 34. Each of the at least two locking spline pins 75 corresponds one-to-one with at least two splines 34 and is slidably connected to the bracket in a vertical direction. The moving drive component 74 is located at the bottom of the bracket 73 and is drively connected to the bottom of each locking spline pin 75. Each spline 34 includes a meshing portion 341 that engages with the digit wheel 35 and a sleeve portion 342 that sleeves onto the unlocking lever 32. The sleeve portion 342 has a notch k.

[0070] When searching for the password, the key 71 is inserted into the leaf lock 72. As the key 71 is turned, the moving drive 74 moves horizontally, driving each locking spline post 75 upward until its top abuts against the outer side of the sleeve part 342. As different number wheels 35 are rotated in sequence, driving the spline 34 to rotate, if the top of the locking spline post 75 slides into the notch k, the correct password is confirmed. After searching for the password, the key 71 is turned in the opposite direction, driving the moving drive 74 to move horizontally in the opposite direction, driving each locking spline post 75 downward until its top separates from the notch k.

[0071] For example, an emergency password-finding mechanism 70 is provided in a mechanical combination lock with a digit wheel unlocking and resetting mechanism. When finding the password, the key 71 is inserted into the leaf lock 72, and the key 71 is turned, driving the moving drive 74 to move horizontally. This drives each locking spline post 75 upwards until its top abuts against the outer side of the sleeve portion 342 of the spline 34. Then, different digit wheels 35 can be rotated. If the top of the locking spline post 75 slides into the notch k, creating a noticeable clicking sensation, the topmost number on the digit wheel is the correct password. After finding the password, the key 71 is turned in the opposite direction, driving the moving drive 74 to move horizontally in the opposite direction. This drives each locking spline post 75 downwards until its top separates from the notch k. Thus, an innovative design incorporates multiple (four shown in the diagram) independent spline post assemblies, each corresponding to a different number wheel 35. This means that each number wheel 35 operates independently, without interference from others. The combination search can begin from any number wheel, effectively solving the problem of interference between multiple number wheels in traditional combination search mechanisms and improving the stability of the combination lock. It should be noted that when the correct combination is selected, the notch in the sleeve faces vertically downwards for easy engagement with the telescopic rod.

[0072] For example, such as Figure 13 As shown, the wafer lock 72 has a lever 721, and the moving drive member 74 has a pawl 741 that cooperates with the lever 721. When the key 71 rotates, driving the lever 721 to rotate, it drives the pawl 741 to rotate, thereby moving the moving drive member 74. To further improve the convenience of finding the combination, a ball groove 771 is provided on the inner wall of the key housing 77 of the wafer lock, and a ball 722 is provided on the side of the wafer lock 72. When the key 71 drives the wafer lock 72 to rotate until the ball 722 enters the ball groove 771, the current position of the key 71 and the wafer lock 72 can be maintained, allowing the user to release the key 71 to find the combination. Here, the key housing 77 can be fixed to one side of the top cover of the combination lock.

[0073] In this application, as Figure 16 As shown, the spline post 75 includes: a telescopic rod 751, a mounting base 752, a first return spring 753, and a second return spring 754. The mounting base 752 is slidably connected to the bracket 73 and has a telescopic space q. The mounting base 752 is drively connected to the moving drive component 74. The bottom of the telescopic rod 751 is slidably connected within the telescopic space q, and the top of the telescopic rod 751 extends out of the telescopic space q and engages with the sleeve portion 342. The first return spring 753 is located within the telescopic space q, and its two ends contact the bottom of the telescopic rod 751 and the bottom wall of the telescopic space q, respectively. The two ends of the second return spring 754 contact the edge portions of the bracket 73 and the mounting base 752, respectively.

[0074] In this way, after the moving drive component 74 moves and contacts the bottom of the mounting base 752, the moving drive component 74 moves and drives the mounting base 752 and the telescopic rod 751 to move upward as a whole. During this process, the second return spring 754 can be compressed. After the top of the telescopic rod 751 contacts the sleeve portion 342, the moving mounting base 752 can compress the first return spring 753, so that the first return spring 753 can apply pressure to the telescopic rod 751, maintaining a large contact force between the telescopic rod 751 and the sleeve portion 342. Thus, when the spline 34 rotates to the notch k and engages with the telescopic rod 751, there is a noticeable locking feature, improving the efficiency of finding the combination lock. In addition, the structures of each spline post 75 are independent of each other, and they are also independent when finding the combination lock for each number wheel. They do not interfere with each other, and the combination lock can start from any number wheel to find the combination lock. This effectively solves the problem of interference between multiple number wheels in traditional combination lock mechanisms and improves the stability of the combination lock.

[0075] Optional, such as Figure 14 and Figure 15 As shown, the movable drive component 74 may have a first drive ramp m5, and the bottom of the corresponding splined column 75 has a second drive ramp m6 that mates with the first drive ramp m5. When the movable drive component 74 moves, the splined column 75 is driven to move upwards through the engagement of the first drive ramp m5 and the second drive ramp m6. Thus, the bottom of the movable drive component 74 and the splined column 75 can convert the horizontal movement of the movable drive component into the vertical movement of the splined column through the engagement of the two drive ramps. It should be noted that when the splined column 75 is provided with a mounting base 752, the bottom of the mounting base 752 is provided with the second drive ramp m6.

[0076] In this embodiment, the emergency password retrieval mechanism 70 may further include a reset spring 76, which may be located between the moving drive member 74 and the bracket 73. When the moving drive member 74 drives the spline post 75 upward, the reset spring 76 can be compressed; after the driving force on the moving drive member 74 is released, the moving drive member 74 is driven back to its initial position under the action of the reset spring 76.

[0077] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0078] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mechanical combination lock with a digit wheel unlocking and resetting mechanism, characterized in that, include: Lock case, switch and lock components, digit wheel combination mechanism and digit wheel reset mechanism; The lock housing has a latch, and the inner wall of the lock housing has a lifting sliding position, at which the lock switch can slide up and down; The digit combination mechanism is located inside the lock housing and includes: a digit wheel frame, an unlocking lever, an elastic element, at least two splines, and at least two digit wheels that correspond one-to-one with the at least two splines; the digit wheel frame is fastened to the cabinet door, the unlocking lever is slidably connected to the digit wheel frame, and the first end of the unlocking lever engages with the lock switch; both ends of the elastic element contact the second ends of the digit wheel frame and the unlocking lever, respectively; each spline is slidably sleeved on the unlocking lever and has a keyway; the side of the unlocking lever has a locking protrusion that engages with each keyway; The digit wheel reset mechanism is connected to each digit wheel and the lock housing. The digit wheel reset mechanism includes at least two synchronizing elements, at least two transmission elements, and at least two drive ropes, each corresponding to one of at least two digit wheels. The synchronizing elements are synchronously connected to the corresponding digit wheels, and the transmission elements are drively connected to the corresponding synchronizing elements. One end of each drive rope is securely connected to the lock housing, and the other end is securely connected to the corresponding transmission element. When the digit wheel reset mechanism is in its initial position, the drive rope is in a bent state. During the unlocking process, the drive rope is tensioned and drives the synchronizing elements to rotate via the transmission elements, thereby rotating the corresponding digit wheels. During the locking process, the drive rope switches from a tensioned state to a bent state, and the digit wheels remain stationary. In the case of a mechanical combination lock with a digit wheel unlocking and resetting mechanism, when the lock is in the locked state, the first end of the unlocking lever is between the lock position and the unlock position. When switching from the locked state to the unlocking state, the digit wheel is moved to rotate the spline to the target position so that the keyway is axially aligned with the locking protrusion. The lock case rotates along the first rotation direction, and the lock is pushed by the lock switch to move the first end of the unlocking lever past the first end of the unlocking lever to reach the unlocking position. At the same time, the digit wheel resetting mechanism drives each digit wheel to rotate. After reaching the unlocking position, multiple digit wheels are in the preset target position. The elastic element pushes the second end of the unlocking lever to move and reset after the lock switch slides past the first end of the unlocking lever. When switching from the unlocking state to the locked state, the lock case rotates along the second direction until the lock switch contacts the first end of the unlocking lever and then slides down. It can also move up and reset after sliding past the first end of the unlocking lever. At the same time, the digit wheel resetting mechanism moves to the initial position, with the first and second rotation directions being opposite.

2. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 1, characterized in that, The switch lock has an unlocking ramp on the side facing the unlock position that is parallel to the axial direction of the lock housing, and the first end of the unlocking rod has a first wedge surface that cooperates with the unlocking ramp; the switch lock has a locking ramp on the side away from the lock position that intersects with the axial direction of the lock housing, and the locking ramp is inclined toward the unlocking ramp, and the first end of the unlocking rod has a second wedge surface that cooperates with the locking ramp.

3. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 2, characterized in that, The lock housing has a sliding groove at its lifting and sliding position, and the extension direction of the sliding groove is parallel to the axial direction of the lock housing; the switch lock component includes: a switch lock slider and a first elastic element, the first elastic element is located in the sliding groove and one end is connected to the bottom of the sliding groove, a part of the switch lock slider extends into the sliding groove and is connected to the other end of the first elastic element, and the other part of the switch lock slider cooperates with the unlocking rod.

4. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 1, characterized in that, The synchronizing element includes a gear that is fastened to the type wheel, and the transmission element includes a reset gear that meshes with the gear. The reset gear is rotatably connected to the type wheel frame. The other end of the drive rope is fastened to the edge of the reset gear. When one end of the drive rope moves with the lock case to the unlocked position, the other end of the drive rope rotates to the lowest position of the reset gear.

5. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 4, characterized in that, The transmission component further includes: a first steering pulley and a second steering pulley rotatably connected to the character wheel frame. The first steering pulley is located below the reset gear and its axis is parallel to the axis of the reset gear. The second steering pulley is adjacent to the first steering pulley, and the axis of the second steering pulley is perpendicular to the axis of the first steering pulley.

6. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 1, characterized in that, The mechanical combination lock with digit wheel unlocking and resetting further includes a combination modification mechanism, which includes a limiting boss fixed on the inner wall of the lock housing, a cover plate located inside the lock housing, and a second elastic member. The second elastic member is sleeved on the unlocking rod and close to the second end of the cover plate. The two ends of the second elastic member are respectively in contact with the digit wheel frame and the outermost spline. The cover plate has at least two sleeve portions corresponding to at least two splines and slidably sleeved on the unlocking rod, and through slots corresponding to at least two digit wheels. A portion of each digit wheel extends out from the corresponding through slot. In the locked state, each digit wheel is rotated to the target position by driving the spline. The lock case is rotated in the second rotation direction until the cover plate contacts the limiting boss. The limiting boss pushes the first end of the cover plate to move, which in turn drives the spline to move through each socket and separates from the corresponding digit wheel along the axial direction of the unlocking rod. At the same time, the second elastic element is compressed. After changing the password by turning the digit wheel, the lock case is rotated in the first rotation direction until the cover plate separates from the limiting boss. Under the reaction force, the second elastic element pushes the outermost spline and multiple sockets to move in the opposite direction, so as to push each spline to re-engage with the corresponding digit wheel.

7. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 1, characterized in that, The mechanical combination lock with digit unlocking and reset also includes an emergency password finding mechanism, which includes a key, a wafer lock, a bracket, a moving drive component, and at least two locking spline pins. The wafer lock is fixed inside the lock housing. The bracket is fixed inside the lock housing and its extension direction is parallel to the arrangement direction of the multiple splines. The at least two locking spline pins correspond one-to-one with at least two splines and are slidably connected to the bracket in the vertical direction. The moving drive component is located at the bottom of the bracket and is drivenly connected to the bottom of each locking spline pin. Each spline includes: an engaging portion that mates with a number wheel and a sleeve portion that sleeves with an unlocking lever, wherein the circumferential side of the sleeve portion has a notch; When searching for the password, the key is inserted into the leaf lock and the key is turned to drive the moving drive component to move horizontally, which in turn drives each locking spline column to move upward until its top abuts against the outer side of the sleeve. As different number wheels are turned in sequence to drive the spline to rotate, if the top of the locking spline column slides into the notch, the correct password is confirmed. After searching for the password, the key is turned in the opposite direction to drive the moving drive component to move horizontally in the opposite direction, which in turn drives each locking spline column to move downward until its top separates from the notch.

8. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 7, characterized in that, The spline post includes: a telescopic rod, a mounting base, a first return spring, and a second return spring. The mounting base is slidably connected to the bracket and has a telescopic space. The mounting base is drively connected to a moving drive component. The bottom of the telescopic rod is slidably connected within the telescopic space, and the top of the telescopic rod extends out of the telescopic space and engages with the sleeve portion. The first return spring is located within the telescopic space, and its two ends contact the bottom of the telescopic rod and the bottom wall of the telescopic space, respectively. The two ends of the second return spring contact the edge portions of the bracket and the mounting base, respectively.

9. The mechanical combination lock with digit unlocking and resetting mechanism according to claim 7, characterized in that, The moving drive component has a first driving slope, and the bottom of the corresponding spline post has a second driving slope that cooperates with the first driving slope; wherein, when the moving drive component moves, the spline post is driven to move upward by the cooperation of the first driving slope and the second driving slope.

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