Self-zeroing public coded lock with state switching function

Abstract

The utility model discloses a self-zeroing public coded lock with a state switching function. The self-zeroing public coded lock comprises a shell, a knob and a code case assembly, the code case assembly is installed in the shell and comprises an installation frame connected with the shell and a rotation stopping frame connected to the installation frame in a swinging mode. A central shaft is arranged on the mounting frame in a penetrating manner, a character wheel and a coupling wheel are rotatably arranged on the central shaft in a sleeving manner, the character wheel is exposed out of the front side of the shell and is in transmission connection with the coupling wheel, and the coupling wheel is in transmission fit with the rotation stopping frame; the coupling wheel can translate relative to the central shaft; the central shaft is sleeved with a retaining spring, and the retaining spring acts on the coupling wheel; a switching assembly is further arranged, the switching assembly comprises a shifting button and a brake part which are in transmission connection, the shifting button is rotatably arranged on the center shaft in a sleeving mode, and the brake part is arranged on the center shaft in a horizontally-moving sleeving mode; switching of connection states between the character wheel and the coupling wheel is achieved through the switching assembly, and a user can operate the switching assembly according to whether a password needs to be reset or not.

Description

Technical Field

[0001] The utility model relates to the field of password locks, in particular to a self-zeroing public password lock with a state switching function. Background Art

[0002] A combination lock is a type of lock that uses a series of numbers or symbols to open. Combination locks can be divided into mechanical combination locks and electronic combination locks. Mechanical combination locks generally rely on turning a combination wheel to enter the password, while electronic combination locks use buttons or touch screens to enter the password.

[0003] Among the existing mechanical combination locks on the market, there is a public combination lock, which has the following characteristics: when the combination wheel is turned to unlock and open the door, the combination wheel will not only automatically return to zero, but also the original combination will immediately become invalid, so that it is convenient for subsequent new users to enter a new combination, so that the combination lock has a new unlocking combination each time it is used, so as to meet the use requirements in a public environment;

[0004] Among them, the Chinese patent application with patent number ZL 202110871904.1 disclosed: "A public mode password lock with emergency function and automatic zeroing, comprising a shell, a password box assembly and a knob on the shell, the password box assembly comprising a mounting frame, the mounting frame is provided with a character wheel assembly and a spring assembly; the mounting frame is provided with a stop frame and a pawl member, the stop frame is against the character wheel assembly through the spring assembly; the character wheel assembly comprises a central shaft, a coupling wheel and a character wheel, the character wheel is integrally formed with a cam, and the knob and the pawl member are driven and matched by a driving structure; the coupling wheel is provided with a positioning hole and a groove, the cam is provided with a positioning column, and the positioning column is coupled with the positioning hole; the stop frame is provided with a protrusion, the stop frame is integrally formed with a stop block, and the knob is provided with a locking block; the central shaft is provided with a reset elastic member and a fixing block, and the knob is provided with an avoidance ring groove. The present invention has the following advantages and effects: The present scheme utilizes a new mechanical structure to achieve automatic zeroing and password resetting, and has the effects of anti-peeping, high security and easy use".

[0005] However, including the solution described in the above patent, there is a problem with the public combination locks in the prior art, that is, the password of the combination lock will be forcibly reset to zero each time it is unlocked. However, the public combination lock may be operated by the same user continuously during use, so there may be a situation where the user does not need to reset the password. In this case, each forced reset of the combination lock will cause inconvenience to the user. Therefore, it is necessary to develop a public combination lock that can decide whether to reset the password according to the user's needs. Summary of the invention

[0006] In order to overcome the disadvantage that the public password lock in the prior art will forcibly reset the password each time it is used, which will cause inconvenience to the user in certain use situations, the utility model provides a self-resetting public password lock with a state switching function.

[0007] The utility model solves the technical problem by providing a self-resetting public password lock with a state switching function, comprising:

[0008] case;

[0009] A knob is inserted into the housing and one end of the knob is exposed at the front side of the housing, and the other end of the knob is connected to a locking rod exposed at the rear side of the housing;

[0010] A password box assembly is installed in the housing and includes a mounting frame connected to the housing and a rotation-stopping frame swingably connected to the mounting frame, wherein the rotation-stopping frame has at least a low position and a high position relative to the mounting frame;

[0011] When the anti-rotation frame is in a low position, the anti-rotation frame forms an interference fit with the knob to prevent the knob from rotating;

[0012] When the anti-rotation frame is in a high position, the cooperation between the anti-rotation frame and the knob is released, and the knob can rotate;

[0013] The mounting frame is provided with a central shaft, and a character wheel and a coupling wheel are rotatably sleeved on the central shaft. The character wheel is exposed at the front side of the housing, and the character wheel and the coupling wheel form a transmission connection, and the coupling wheel and the anti-rotation frame form a transmission match. By turning the character wheel, the coupling wheel can be driven to rotate, thereby driving the anti-rotation frame to swing.

[0014] The coupling wheel is arranged to be translatably movable relative to the central axis;

[0015] A retaining spring is sleeved on the central shaft, and the retaining spring acts on the coupling wheel so that the coupling wheel always has a movement tendency to stay connected with the character wheel;

[0016] A switching assembly is also provided, the switching assembly includes a dial button and a brake member which are transmission-connected with each other, the dial button is rotatably sleeved on the central axis, the brake member is translationally sleeved on the central axis, the housing is also provided with a window for the dial button to extend out, the dial button can have a first gear state and a second gear state by swinging in the window;

[0017] When the dial button is in the first gear state, the dial button drives the brake member to approach the coupling wheel, and the brake member acts on the coupling wheel to make it have a movement tendency to be disconnected from the character wheel;

[0018] When the dial button is in the second gear state, the dial button drives the brake member away from the coupling wheel, the effect of the brake member on the coupling wheel is released, and the coupling wheel remains connected with the character wheel under the action of the retaining spring.

[0019] The specific transmission structure and method between the dial button and the brake member is further that the side wall of the brake member is also convexly provided with a guide rib, and the housing is correspondingly provided with a guide groove, and the guide rib and the guide groove form a plug-in fit to prevent the brake member from rotating relative to the housing, and the rotation of the dial button can drive the brake member to translate and make the guide rib slide along the guide groove;

[0020] A driving block is protruding from the dial button toward the brake member, one end of the brake member is in contact with the dial button, and a relief groove is recessed on the end of the brake member, and the driving block can enter or exit the relief groove as the knob is rotated;

[0021] When the dial button is in the first gear state, the driving block withdraws from the avoidance groove and abuts against the end surface of the brake member;

[0022] When the dial button is in the second gear state, the driving block is plugged into the avoidance groove.

[0023] The specific composition structure of the housing is further that the housing includes an upper shell and a bottom cover connected to each other, and the bottom cover includes a left cover and a right cover;

[0024] The bottom cover is provided with a through hole for the bottom of the knob to pass through, and the through hole is formed by combining a left arc groove on the left cover and a right arc groove on the right cover;

[0025] A limiting column is also protruded from the bottom of the upper shell, and a limiting hole capable of plugging and fitting with the limiting column is provided on the bottom cover. The limiting hole is formed by combining a left half hole on the left cover and a right half hole on the right cover.

[0026] The connection structure between the character wheel and the coupling wheel is further that a plurality of positioning posts are convexly provided on the character wheel, and a plurality of positioning holes are correspondingly opened on the coupling wheel. Transmission is achieved between the character wheel and the coupling wheel through the plug-in cooperation between the positioning posts and the positioning holes, and the positioning posts can enter or exit the positioning holes by translating the coupling wheel relative to the character wheel.

[0027] The retaining structure of the anti-rotation frame in the cipher wheel and the blocking structure of the character wheel are further provided with a spring assembly in the mounting frame, and the spring assembly includes a plurality of elastic sheets and elastic paddles;

[0028] The elastic sheet is against the bottom of the anti-rotation frame and acts on the anti-rotation frame to make it always have a movement tendency to move toward a high position;

[0029] The elastic pick is against the lower side of the character wheel and acts on the character wheel to block its rotation.

[0030] The specific matching mode of the coupling wheel and the anti-rotation frame is further that the coupling wheel is provided with a groove, the anti-rotation frame is provided with a protrusion, and the coupling wheel is rotated so that the groove and the protrusion are aligned or staggered;

[0031] When the grooves on all coupling wheels are aligned with the protrusions, the protrusions can form an inlay fit with the grooves, and the anti-rotation frame is in a high position;

[0032] When the grooves on one or more coupling wheels are staggered from the protrusions, the protrusions and grooves are released from engagement, and the anti-rotation frame is now in a low position.

[0033] The anti-rotation frame has a further blocking structure for the movement of the coupling wheel. The coupling wheel is also provided with a notch connected to the groove. The anti-rotation frame is also provided with a protrusion on the top of the protrusion. When the groove and the protrusion form an interlocking fit, the protrusion can be snap-fitted into the notch.

[0034] The reset structure and method in the combination lock further includes a reset component in the mounting frame, the reset component includes a ratchet member that is swingably connected to the mounting frame, a cam is protrudingly provided on one side of the character wheel, the cam is arranged in a logarithmic spiral wheel, the ratchet member includes a plurality of ratchets that can form a toggle fit with the cam, an extension column is protrudingly provided on one side of the ratchet member, a slope groove is provided on the side wall of the knob, and the extension column passes through the side wall of the mounting frame and is plugged into the slope groove;

[0035] By rotating the knob, the extension column can slide along the slope groove and drive the pawl to swing, so that the pawl drives the cam to make the character wheel rotate back to zero.

[0036] The specific interference structure and method of the anti-rotation frame for the rotation of the knob is further that a anti-rotation block is convexly provided on one side of the anti-rotation frame, and an avoidance ring groove is provided on the side wall of the knob. The anti-rotation block passes through the mounting frame and extends into the avoidance ring groove. When the knob is rotated, the anti-rotation block can slide in the avoidance ring groove, and a locking block is also provided in the avoidance ring groove;

[0037] When the anti-rotation frame is in a low position, the anti-rotation block overlaps with the locking block, and the anti-rotation block blocks the rotation path of the locking block, and the knob cannot rotate at this time;

[0038] When the anti-rotation frame is in a high position, the anti-rotation block and the locking block are staggered, and the locking block can rotate and pass under the anti-rotation block, and at this time the knob can rotate.

[0039] The emergency unlocking structure and method of the password lock further includes a lock core in the knob, the lock core includes a lock hole located at the top of the knob, the lock core is in transmission connection with the lock block, and can drive the lock block to extend or retract relative to the knob;

[0040] The lock block can be retracted into the knob by rotating the lock core, so that the lock block and the anti-rotation block can be staggered.

[0041] Unlocking method and password resetting method of the utility model:

[0042] Normal unlocking: by turning the character wheel to the correct number, the character wheel can drive the coupling wheel to rotate, and the groove on the coupling wheel is aligned with the protrusion of the anti-rotation frame. When the numbers of all the character wheels are turned correctly, the grooves on all the coupling wheels are aligned with the protrusions. At this time, the protrusion can be embedded in the groove, and the anti-rotation frame will be lifted up by the spring assembly, switching from the low position to the high position. The anti-rotation block on the anti-rotation member is also lifted up and staggered with the lock block. At this time, the knob can be turned to make the lock rod rotate and unlock. In the process of turning the knob, the extension column on the pawl will also slide along the sloped groove on the knob, thereby driving the pawl to turn the cam on the character wheel to make the character wheel rotate back to zero, so as to prevent the password from being peeped by others;

[0043] Emergency unlocking: When encountering an emergency such as forgetting the password, you can also insert the key into the lock hole on the knob and turn the lock core to drive the lock block to retract into the knob. At this time, the anti-rotation block can also be staggered with the lock block, and then turn the knob to drive the lock rod to unlock;

[0044] Locking: The lock rod is rotated and locked by turning the knob, and the extension column on the pawl can also slide along the sloped groove on the knob during the process, and the pawl moves the cam to complete the zeroing of the character wheel. When the character wheel rotates to zero, it will also drive the coupling wheel to rotate. After the coupling wheel rotates, one or more grooves and protrusions on the coupling wheel will be staggered. At this time, the coupling wheel will push the anti-rotation frame to switch from the high position to the low position, so that the anti-rotation block and the lock block are aligned. Therefore, when the locking is completed, the knob cannot be turned without entering the correct password;

[0045] Reset password: When the door is locked, even if the dial button is turned to switch from the second gear state to the first gear state, since one or more grooves on the coupling wheel are staggered with the protrusions, when the brake member pushes the coupling wheel, the protrusion on the anti-rotation frame will form an interference fit with the side wall of the coupling wheel, thereby preventing the translation of the coupling wheel. At this time, the coupling wheel is still connected to the character wheel, and the password cannot be reset;

[0046] When unlocked, because the grooves on all the coupling wheels are aligned with the protrusions, the notches on the coupling wheels are also aligned with the protrusions on the anti-rotation frame. At this time, turning the dial button to switch it from the second gear state to the first gear state can enable the brake member to push the coupling wheel to translate, so that the protrusion snaps into the notch and separates the coupling wheel from the character wheel. Then the password can be adjusted by rotating each character wheel. When the password is determined, the dial button is turned from the first gear state back to the second gear state, so that the coupling wheel is reconnected with the character wheel under the push of the holding spring. At this time, the password is reset. After the password is reset, when locking again, the character wheel will return to zero under the action of the ratchet member, which can prevent the newly set password from being peeped.

[0047] The beneficial effects of the utility model are:

[0048] 1. A switching component is provided, and the switching component is used to switch the connection state between the character wheel and the coupling wheel. Therefore, when the password lock is unlocked, the user can operate the switching component according to whether the password needs to be reset. Compared with the existing public password locks on the market that automatically reset the password, the user of this password lock can choose according to the situation, which makes the user experience of the password lock better and can also make the password lock applicable to more different scenarios;

[0049] 2. The housing of the password lock is composed of an upper housing and a bottom cover, and the bottom cover is composed of a left cover and a right cover, so that the housing can fix the inner knob and the password box assembly, making the assembly process of the entire password lock faster and more convenient;

[0050] 3. A zeroing component is provided, which can automatically return the character wheel to zero during the unlocking and locking process, preventing the password from being peeped by others during the use of the password lock;

[0051] 4. A protrusion is also provided on the anti-rotation frame. When the combination lock is in a locked state, the protrusion can prevent the coupling wheel from moving, thereby ensuring that when the combination lock is locked, the password cannot be reset even if the switching component is operated;

[0052] 5. There is also a lock core inside the knob. When encountering an emergency such as forgetting the password, the key can also be used to unlock the password lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of the utility model.

[0054] Figure 2 It is an exploded view of the utility model.

[0055] Figure 3 It is an exploded view of the password box assembly in the utility model.

[0056] Figure 4 It is a schematic diagram of the state change of the coupling wheel being separated from the character wheel by the switching component in the utility model.

[0057] Figure 5 It is a disassembly schematic diagram of the switching component in the utility model.

[0058] Figure 6 It is a structural schematic diagram of the upper shell in the utility model.

[0059] Figure 7 It is a schematic diagram of the disassembly of the bottom cover in the utility model.

[0060] Figure 8 It is a schematic diagram of the cooperation between the character wheel, the coupling wheel and the anti-rotation frame in the utility model.

[0061] Fig. 9 It is a schematic diagram of the cooperation between the pawl and the knob in the utility model.

[0062] Fig.10 It is a structural schematic diagram of the character wheel in the utility model.

[0063] Fig.11 It is a schematic diagram of the cooperation between the stop rotating part and the knob of the utility model.

[0064] Fig.12 It is a cross-sectional view of the knob in the utility model.

[0065] Numbers in the figure: 1, housing; 2, knob; 3, lock rod; 4, password box assembly; 5, mounting frame; 6, anti-rotation frame; 7, central axis; 8, character wheel; 9, coupling wheel; 10, holding spring; 11, switching assembly; 12, dial button; 13, brake; 14, guide rib; 15, guide groove; 16, drive block; 17, avoidance groove; 18, upper shell; 19, bottom cover; 20, left cover; 21, right cover; 22, through hole; 23, left arc groove; 24, right arc groove; 25, limit column; 26, limit Position hole; 27, left half hole; 28, right half hole; 29, positioning column; 30, positioning hole; 31, spring assembly; 32, elastic sheet; 33, elastic pick; 34, groove; 35, protrusion; 36, notch; 37, bump; 38, zeroing assembly; 39, pawl; 40, cam; 41, pawl; 42, extension column; 43, sloped groove; 44, stop block; 45, avoidance ring groove; 46, lock block; 47, lock core; 48, lock hole; a, first gear state; b, second gear state. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0067] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0068] Example

[0069] Combination Figures 1 to 12 A self-reset public password lock with a state switching function is shown, comprising a shell 1, a knob 2 and a password box assembly 4; the knob 2 is inserted into the shell 1 and one end is exposed at the front side of the shell 1, and the other end of the knob 2 is connected to a lock rod 3 exposed at the rear side of the shell 1; the password box assembly 4 is installed in the shell 1, and comprises a mounting frame 5 connected to the shell 1, and a rotation-stopping frame 6 swingably connected to the mounting frame 5, and the rotation-stopping frame 6 has at least a low position and a high position relative to the mounting frame 5; when the rotation-stopping frame 6 is in the low position, the rotation-stopping frame 6 forms an interference fit with the knob 2 to prevent the knob 2 from rotating; when the rotation-stopping frame 6 is in the high position, the fit between the rotation-stopping frame 6 and the knob 2 is released, and the knob 2 can rotate; a central shaft 7 is inserted through the mounting frame 5, and a character wheel 8 and a coupling wheel are rotatably sleeved on the central shaft 7 9, the character wheel 8 is exposed at the front side of the housing 1, the character wheel 8 is connected with the coupling wheel 9 in a transmission manner, and the coupling wheel 9 is matched with the anti-rotation frame 6 in a transmission manner, and the coupling wheel 9 can be driven to rotate by turning the character wheel 8, thereby driving the anti-rotation frame 6 to swing; the coupling wheel 9 can be arranged to be translated relative to the central axis 7; a retaining spring 10 is sleeved on the central axis 7, and the retaining spring 10 acts on the coupling wheel 9, so that the coupling wheel 9 always has a movement tendency to maintain connection with the character wheel 8; a switching component 11 is also provided, and the switching component 11 includes a dial button 12 and a brake member 13 connected to each other in a transmission manner, the dial button 12 can be rotatably sleeved on the central axis 7, and the brake member 13 can be translated sleeved on the central axis 7, and a window for the dial button 12 to extend is also provided on the housing 1, and the dial button 12 can have a first gear state a and a second gear state b by swinging in the window; wherein as Figure 4As shown, when the dial button 12 is in the first gear state a, the dial button 12 drives the brake member 13 to approach the coupling wheel 9, and the brake member 13 acts on the coupling wheel 9 to make it have a movement tendency to be disconnected from the character wheel 8; Figure 4 As shown, when the dial button 12 is in the second gear state b, the dial button 12 drives the brake member 13 away from the coupling wheel 9, the effect of the brake member 13 on the coupling wheel 9 is released, and the coupling wheel 9 remains connected to the character wheel 8 under the action of the retaining spring 10.

[0070] Combination Figure 5 and Figure 6 As shown, in this embodiment, the side wall of the brake member 13 is also convexly provided with a guide rib 14, and the housing 1 is correspondingly provided with a guide groove 15, the guide rib 14 and the guide groove 15 are plugged together to prevent the brake member 13 from rotating relative to the housing 1, and the rotation of the dial button 12 can drive the brake member 13 to translate, and make the guide rib 14 slide along the guide groove 15; the dial button 12 is also convexly provided with a driving block 16 toward the brake member 13, one end of the brake member 13 is in contact with the dial button 12, and the brake member 13 is located on the end and is recessed with an avoidance groove 17, and the driving block 16 can enter or exit the avoidance groove 17 with the rotation of the knob 2; when the dial button 12 is in the first gear state a, the driving block 16 withdraws from the avoidance groove 17 and abuts on the end face of the brake member 13; when the dial button 12 is in the second gear state b, the driving block 16 is plugged in and fits in the avoidance groove 17.

[0071] Combination Figure 2 , Figure 6 and Figure 7 As shown, in this embodiment, the shell 1 includes an upper shell 18 and a bottom cover 19 connected to each other, and the bottom cover 19 includes a left cover 20 and a right cover 21; the bottom cover 19 is provided with a through hole 22 for the bottom of the knob 2 to pass through, and the through hole 22 is formed by a left arc groove 23 on the left cover 20 and a right arc groove 24 on the right cover 21; a limiting column 25 is also protruding from the bottom of the upper shell 18, and a limiting hole 26 that can be plug-fitted with the limiting column 25 is provided on the bottom cover 19, and the limiting hole 26 is formed by a left half hole 27 on the left cover 20 and a right half hole 28 on the right cover 21.

[0072] Combination Figure 8 and Fig.10 As shown, in this embodiment, a plurality of positioning posts 29 are protruding from the character wheel 8, and a plurality of positioning holes 30 are correspondingly opened on the coupling wheel 9. The character wheel 8 and the coupling wheel 9 realize transmission through the plug-in cooperation between the positioning posts 29 and the positioning holes 30, and the positioning posts 29 can enter or exit the positioning holes 30 by translating the coupling wheel 9 relative to the character wheel 8.

[0073] Among them Figure 3 As shown, a spring assembly 31 is also provided in the mounting frame 5 described in this embodiment, and the spring assembly 31 includes a plurality of elastic sheets 32 and an elastic paddle 33; the elastic sheet 32 ​​is pressed against the bottom of the anti-rotation frame 6, and acts on the anti-rotation frame 6 to make it always have a movement tendency to move toward a high position; the elastic paddle 33 is pressed against the bottom of the character wheel 8, and acts on the character wheel 8 to block its rotation.

[0074] Among them Figure 8 As shown, in this embodiment, a groove 34 is provided on the coupling wheel 9, and a protrusion 35 is convexly provided on the anti-rotation frame 6. The coupling wheel 9 is rotated so that the groove 34 and the protrusion 35 are aligned or staggered. When the grooves 34 on all coupling wheels 9 are aligned with the protrusions 35, the protrusions 35 can form an embedded fit with the grooves 34, and the anti-rotation frame 6 is in a high position. When the grooves 34 and the protrusions 35 on one or more coupling wheels 9 are staggered, the protrusions 35 are released from the grooves 34, and the anti-rotation frame 6 is in a low position.

[0075] Among them Figure 8 As shown, in this embodiment, the coupling wheel 9 is further provided with a notch 36 connected to the groove 34, and the anti-rotation frame 6 is further provided with a protrusion 37 at the top of the protrusion 35. When the groove 34 and the protrusion 35 form an interlocking fit, the protrusion 37 can be snap-fitted into the notch 36.

[0076] Combination Figure 3 , Fig. 9 and Fig.10 As shown, in this embodiment, a zeroing component 38 is also provided in the mounting frame 5, and the zeroing component 38 includes a pawl member 39 that is swingably connected to the mounting frame 5. A cam 40 is also protrudingly provided on one side of the character wheel 8. The cam 40 is arranged in a logarithmic spiral wheel. The pawl member 39 includes a plurality of pawls 41 that can form a toggle fit with the cam 40. An extension column 42 is also protrudingly provided on one side of the pawl member 39. A sloped groove 43 is provided on the side wall of the knob 2. The extension column 42 passes through the side wall of the mounting frame 5 and is plugged into the sloped groove 43. Rotating the knob 2 can make the extension column 42 slide along the sloped groove 43 and drive the pawl member 39 to swing, so that the character wheel 8 rotates to zero by toggling the cam 40 through the pawl 41.

[0077] Combination Figure 3 and Fig.11As shown, in this embodiment, a stop block 44 is protruding from one side of the stop frame 6, and an avoidance ring groove 45 is opened on the side wall of the knob 2. The stop block 44 passes through the mounting frame 5 and extends into the avoidance ring groove 45. When the knob 2 rotates, the stop block 44 can slide in the avoidance ring groove 45, and a locking block 46 is also provided in the avoidance ring groove 45; when the stop frame 6 is in a low position, the stop block 44 coincides with the locking block 46, and the stop block 44 blocks the rotation path of the locking block 46, and the knob 2 cannot rotate at this time; when the stop frame 6 is in a high position, the stop block 44 is staggered with the locking block 46, and the locking block 46 can rotate through from under the stop block 44, and the knob 2 can rotate at this time.

[0078] Among them Fig.12 As shown, in this embodiment, the knob 2 also includes a lock core 47, and the lock core 47 includes a lock hole 48 located at the top of the knob 2. The lock core 47 forms a transmission connection with the lock block 46, and can drive the lock block 46 to extend or retract relative to the knob 2; by rotating the lock core 47 to retract the lock block 46 into the knob 2, the lock block 46 can also be staggered with the stop block 44.

[0079] Unlocking method and password resetting method of this embodiment:

[0080] Normal unlocking: by dialing the character wheel 8 to the correct number, the character wheel 8 can drive the coupling wheel 9 to rotate, and the groove 34 on the coupling wheel 9 is aligned with the protrusion 35 of the anti-rotation frame 6. When all the numbers of the character wheel 8 are dialed correctly, the grooves 34 on all the coupling wheels 9 are aligned with the protrusion 35. At this time, the protrusion 35 can be embedded in the groove 34, and the anti-rotation frame 6 will be lifted up under the action of the spring assembly 31, switching from the low position to the high position, and the anti-rotation block 44 on the anti-rotation member is also lifted up and staggered with the lock block 46. At this time, the knob 2 can be turned to make the lock rod 3 rotate and unlock, and in the process of turning the knob 2, the extension column 42 on the pawl member 39 will also slide along the sloped groove 43 on the knob 2, thereby driving the pawl 41 to dial the cam 40 on the character wheel 8, so that the character wheel 8 rotates back to zero, so as to prevent the password from being peeped by others;

[0081] Emergency unlocking: When encountering an emergency such as forgetting the password, you can also insert the key into the lock hole 48 on the knob 2 and rotate the lock core 47 to drive the lock block 46 to retract into the knob 2. At this time, the anti-rotation block 44 can also be staggered with the lock block 46. Then, turn the knob 2 to drive the lock rod 3 to unlock;

[0082] Locking: The locking rod 3 is rotated and locked by rotating the knob 2. In the process, the extension column 42 on the pawl 39 can also slide along the slope groove 43 on the knob 2, and the pawl 41 moves the cam 40 to complete the zeroing of the character wheel 8. When the character wheel 8 rotates to zero, it will also drive the coupling wheel 9 to rotate. After the coupling wheel 9 rotates, one or more grooves 34 on the coupling wheel 9 will be staggered with the protrusion 35. At this time, the coupling wheel 9 will push the anti-rotation frame 6 to switch from the high position to the low position, so that the anti-rotation block 44 is aligned with the lock block 46. Therefore, when the locking is completed, the knob 2 cannot be rotated without entering the correct password;

[0083] Resetting the password: In the locked state, even if the dial button 12 is turned to switch from the second gear state b to the first gear state a, since at this time one or more grooves 34 on the coupling wheel 9 are staggered with the protrusions 35, when the brake member 13 pushes the coupling wheel 9, the protrusion 37 on the anti-rotation frame 6 will form an interference fit with the side wall of the coupling wheel 9, thereby preventing the translation of the coupling wheel 9. At this time, the coupling wheel 9 is still connected to the character wheel 8, and the password cannot be reset;

[0084] In the unlocked state, because the grooves 34 on all the coupling wheels 9 are aligned with the protrusions 35, the notches 36 on the coupling wheels 9 are also aligned with the protrusions 37 on the anti-rotation frame 6. At this time, the dial button 12 is turned to switch it from the second gear state b to the first gear state a, which can enable the brake member 13 to push the coupling wheel 9 to translate, so that the protrusion 37 is snap-fitted into the notch 36, and the coupling wheel 9 is separated from the character wheel 8. Then the password can be adjusted by rotating each character wheel 8. After the password is determined, the dial button 12 is turned from the first gear state a back to the second gear state b, so that the coupling wheel 9 is reconnected with the character wheel 8 under the push of the retaining spring 10. At this time, the password is reset. After the password is reset, when the door is locked again, the character wheel 8 will return to zero under the action of the pawl member 39, which can prevent the newly set password from being peeped.

[0085] The advantage of this embodiment is that a switching component is provided, and the user can decide whether to reset the password according to needs after unlocking, so that the combination lock can be applied to more usage scenarios and improve the user experience.

[0086] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A self-resetting public password lock with state switching function, comprising: Housing (1); A knob (2) is inserted into the housing (1) and one end of which is exposed at the front side of the housing (1); the other end of the knob (2) is connected to a locking rod (3) exposed at the rear side of the housing (1); A password box assembly (4) is installed in a housing (1) and comprises a mounting frame (5) connected to the housing (1) and a rotation-stopping frame (6) swingably connected to the mounting frame (5), wherein the rotation-stopping frame (6) has at least a low position and a high position relative to the mounting frame (5); When the anti-rotation frame (6) is in a low position, the anti-rotation frame (6) forms an interference fit with the knob (2) to prevent the knob (2) from rotating; When the anti-rotation frame (6) is in a high position, the cooperation between the anti-rotation frame (6) and the knob (2) is released, and the knob (2) can rotate; The mounting frame (5) is provided with a central shaft (7), and a character wheel (8) and a coupling wheel (9) are rotatably sleeved on the central shaft (7), the character wheel (8) is exposed at the front side of the housing (1), the character wheel (8) and the coupling wheel (9) form a transmission connection, and the coupling wheel (9) and the anti-rotation frame (6) form a transmission match, and the coupling wheel (9) can be driven to rotate by turning the character wheel (8), thereby driving the anti-rotation frame (6) to swing; Features: The coupling wheel (9) is arranged to be translatably movable relative to the central axis (7); A retaining spring (10) is sleeved on the central shaft (7), and the retaining spring (10) acts on the coupling wheel (9) so that the coupling wheel (9) always has a movement tendency to maintain connection with the character wheel (8); A switching assembly (11) is also provided, the switching assembly (11) comprising a dial button (12) and a brake member (13) which are transmission-connected to each other, the dial button (12) being rotatably sleeved on the central shaft (7), the brake member (13) being translationally sleeved on the central shaft (7), the housing (1) also being provided with a window for the dial button (12) to extend out, the dial button (12) being able to have a first gear position state (a) and a second gear position state (b) by swinging in the window; When the dial button (12) is in the first gear state (a), the dial button (12) drives the brake member (13) to approach the coupling wheel (9), and the brake member (13) acts on the coupling wheel (9) to make it have a movement tendency to be disconnected from the character wheel (8); When the dial button (12) is in the second gear state (b), the dial button (12) drives the brake member (13) away from the coupling wheel (9), the effect of the brake member (13) on the coupling wheel (9) is released, and the coupling wheel (9) remains connected to the character wheel (8) under the action of the retaining spring (10).

2. A self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: The side wall of the brake member (13) is also provided with a guide rib (14), and the housing (1) is provided with a guide groove (15) correspondingly, the guide rib (14) and the guide groove (15) are plug-fitted to prevent the brake member (13) from rotating relative to the housing (1), and the rotation of the dial button (12) can drive the brake member (13) to translate and cause the guide rib (14) to slide along the guide groove (15); A driving block (16) is also protruded on the dial button (12) toward the brake member (13), one end of the brake member (13) is in contact with the dial button (12), and a relief groove (17) is recessed on the end of the brake member (13), and the driving block (16) can enter or exit the relief groove (17) as the knob (2) rotates; When the dial button (12) is in the first gear state (a), the driving block (16) withdraws from the avoidance groove (17) and abuts against the end surface of the brake member (13); When the dial button (12) is in the second gear state (b), the driving block (16) is inserted and fitted in the avoidance groove (17).

3. A self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: The housing (1) comprises an upper shell (18) and a bottom cover (19) which are connected to each other, and the bottom cover (19) comprises a left cover (20) and a right cover (21); The bottom cover (19) is provided with a through hole (22) for the bottom of the knob (2) to pass through, and the through hole (22) is formed by combining a left arc groove (23) on the left cover (20) and a right arc groove (24) on the right cover (21); The bottom of the upper shell (18) is also provided with a limiting column (25), and the bottom cover (19) is provided with a limiting hole (26) that can be plugged into and fit with the limiting column (25). The limiting hole (26) is formed by combining a left half hole (27) on the left cover (20) and a right half hole (28) on the right cover (21).

4. A self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: The character wheel (8) is provided with a plurality of positioning posts (29), and the coupling wheel (9) is provided with a plurality of positioning holes (30) correspondingly. The character wheel (8) and the coupling wheel (9) are connected to each other through the plug-in cooperation between the positioning posts (29) and the positioning holes (30), and the positioning posts (29) can enter or exit the positioning holes (30) by translating the coupling wheel (9) relative to the character wheel (8).

5. The self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: A spring assembly (31) is also provided in the mounting frame (5), and the spring assembly (31) includes a plurality of elastic sheets (32) and elastic paddles (33); The elastic sheet (32) is against the bottom of the anti-rotation frame (6) and acts on the anti-rotation frame (6) to make it always have a movement tendency to move towards a high position; The elastic paddle (33) abuts against the lower side of the character wheel (8) and acts on the character wheel (8) to block its rotation.

6. A self-reset-to-zero public password lock with state switching function according to claim 5, characterized in that: The coupling wheel (9) is provided with a groove (34), the anti-rotation frame (6) is provided with a protrusion (35), and the coupling wheel (9) is rotated so that the groove (34) and the protrusion (35) are aligned or staggered. When the grooves (34) on all coupling wheels (9) are aligned with the protrusions (35), the protrusions (35) can form an inlay fit with the grooves (34), and at this time the anti-rotation frame (6) is in a high position; When the grooves (34) and the protrusions (35) on one or more coupling wheels (9) are offset from each other, the protrusions (35) and the grooves (34) are released from engagement, and the anti-rotation frame (6) is now in a low position.

7. A self-reset-to-zero public password lock with state switching function according to claim 6, characterized in that: The coupling wheel (9) is also provided with a notch (36) connected to the groove (34); the anti-rotation frame (6) is also provided with a protrusion (37) at the top of the protrusion (35); when the groove (34) and the protrusion (35) form an embedded fit, the protrusion (37) can be snap-fitted into the notch (36).

8. The self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: A zeroing assembly (38) is also provided in the mounting frame (5), and the zeroing assembly (38) includes a pawl member (39) which is swingably connected to the mounting frame (5). A cam (40) is also protrudingly provided on one side of the character wheel (8), and the cam (40) is arranged in a logarithmic spiral wheel. The pawl member (39) includes a plurality of pawls (41) which can form a toggle fit with the cam (40). An extension column (42) is also protrudingly provided on one side of the pawl member (39). A sloped groove (43) is provided on the side wall of the knob (2), and the extension column (42) passes through the side wall of the mounting frame (5) and is plugged into and fits in the sloped groove (43). By rotating the knob (2), the extension column (42) can slide along the slope groove (43) and drive the pawl member (39) to swing, thereby causing the pawl (41) to move the cam (40) to rotate the character wheel (8) back to zero.

9. The self-reset-to-zero public password lock with state switching function according to claim 1, characterized in that: A stop block (44) is convexly provided on one side of the stop frame (6), and an escape ring groove (45) is provided on the side wall of the knob (2). The stop block (44) passes through the mounting frame (5) and extends into the escape ring groove (45). When the knob (2) is rotated, the stop block (44) can slide in the escape ring groove (45), and a locking block (46) is also provided in the escape ring groove (45); When the anti-rotation frame (6) is in a low position, the anti-rotation block (44) overlaps with the locking block (46), and the anti-rotation block (44) blocks the rotation path of the locking block (46), and the knob (2) cannot rotate at this time; When the anti-rotation frame (6) is in a high position, the anti-rotation block (44) and the locking block (46) are staggered, and the locking block (46) can rotate and pass under the anti-rotation block (44), and at this time, the knob (2) can rotate.

10. A self-reset-to-zero public password lock with state switching function according to claim 9, characterized in that: The knob (2) further includes a lock core (47), the lock core (47) including a lock hole (48) located at the top of the knob (2), the lock core (47) and the lock block (46) forming a transmission connection, and being able to drive the lock block (46) to extend or retract relative to the knob (2); By rotating the lock core (47) to retract the lock block (46) into the knob (2), the lock block (46) can also be staggered with the anti-rotation block (44).

Images