A mechanical password unlocking device and unlocking method for a door lock

Abstract

The present invention relates to the field of password locks, and more particularly to a mechanical password unlocking device for door locks and an unlocking method thereof. The unlocking device comprises: a housing, a mechanical password lock assembly, a toggle lever drive assembly, a cam unlocking assembly, and an unlocking transmission output assembly. The device can be installed on a smart door lock. By turning the code adjustment wheel on the mechanical password lock assembly to the correct password position, and then toggling the unlocking push button to the right, the shaft core moves upward. The unlocking push button can cause the inclined groove to drive the first shaft head to lift the shaft core, causing the locking plate to disengage from the locking groove and release the rotation restriction of the first cam. Continuing to toggle the toggle lever, the first cam drives the lever and latch to move upward. Finally, the handle is plugged into the first drive connection port and rotated clockwise, driving the unlocking transmission output assembly to rotate the drive transmission assembly to unlock the lock body of the smart door lock. This allows the door to be opened by toggling the mechanical password lock when the user does not have a key and cannot use a password to enter the house.

Description

Technical Field

[0001] The present invention relates to the field of password locks, and in particular to a mechanical password unlocking device and unlocking method for door locks. 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 categorized as mechanical or digital. The combination in a combination lock is usually a permutation, not a true combination. Some combination locks use a single dial that rotates several discs or cams inside the lock, while others use a numbered dial ring to directly activate the lock's internal mechanism.

[0003] At present, most anti-theft doors on the market use electronic password locks, such as a smart door lock disclosed in a Chinese invention patent application (application number 201910632435.0). The smart door lock includes a lock core, an inner component and an outer component. The inner component and the outer component are respectively located on both sides of the lock core. A first information acquisition module, an input module and a second information acquisition module are provided on the outer shell. A storage module, a control module and a power module are provided in the outer shell. The first information acquisition module includes a camera and a processing chip for collecting image information and transmitting the collected image information to the storage module. The input module is electrically connected to the storage module and the control module. The storage module is used to store unlocking information. The control module generates an unlocking signal to control the lock core to unlock. The power module is used to power the first information acquisition module, the input module, the second information acquisition module, the storage module, the control module and the lock core. This smart door lock can be unlocked by password, fingerprint and key, but this smart password lock is battery-powered. If the battery is insufficient, or the internal smart module circuit is damaged due to long-term use, causing the password and fingerprint to become invalid, and people do not have the key with them, they will not be able to enter or exit the door. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a mechanical password unlocking device for a door lock. When people do not have a key and cannot use a password to enter the house, they can unlock the unlocking transmission output assembly by turning the mechanical lock password lock, and the door lock can be opened by the handle.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A mechanical password unlocking device for a door lock, the unlocking device comprising: a housing, a mechanical password lock, a toggle lever driving assembly, a cam unlocking assembly, and an unlocking transmission output assembly; the toggle lever driving assembly, the cam unlocking assembly, and the unlocking transmission output assembly are mounted on the housing;

[0007] The mechanical combination lock comprises a shaft core, a locking ring and a plurality of coding wheels, and the locking ring and the coding wheels cooperate to lock or unlock the axial movement of the shaft core; a mounting notch is provided in the housing, the mechanical combination lock is fixedly provided in the mounting notch, and a plurality of through slots are provided on the front panel of the housing, and the plurality of coding wheels partially protrude outside the through slots;

[0008] The toggle lever driving assembly includes a toggle lever and a first cam, the first cam being sleeved on the upper portion of the shaft core, the first cam being provided with a first cam groove, the toggle lever being fixedly provided on the first cam and capable of toggling the first cam to rotate on the shaft core, and a toggle lever groove being provided on the front panel of the housing at the toggle lever position, with the outer end of the toggle lever exposing the toggle lever groove;

[0009] The cam unlocking assembly includes a locking piece, an unlocking push key and a second spring for resetting the unlocking push key, one side of the locking piece is connected to the end of the shaft core, and a guide groove 1 is provided on the housing, the outer end of the first cam is radially provided with a locking groove, and the other side of the locking piece is located in the guide groove 1 and the locking groove to lock the rotation of the first cam; the unlocking push key is horizontally on the slideway inside the housing, the outer side of the unlocking push key has a push block exposed to the front panel of the housing, and an inclined groove is provided on the inner side, and the end of the shaft core is provided with a first shaft head facing the inclined groove, and the first shaft head is accommodated in the inclined groove; driving the unlocking push key can cause the inclined groove to drive the first shaft head to lift the shaft core so that the locking piece disengages from the locking groove and releases the rotation restriction of the first cam;

[0010] The unlocking transmission output assembly includes a driving lever, a latch, an unlocking rotating shaft and a third spring for resetting the latch; the middle part of the driving lever is hingedly arranged on the right side of the first cam, the latch is vertically arranged on the slide inside the shell, and the unlocking rotating shaft is arranged below the latch, the front end of the unlocking rotating shaft is exposed to the front panel of the shell and is provided with a first driving connection port for connecting the handle, and the rear end of the unlocking rotating shaft is exposed to the rear panel of the shell and is provided with a second connection port for driving the door lock to unlock; one end of the driving lever is provided with a second shaft head, the second shaft head is accommodated in the first cam groove, the other end of the driving lever is located in the connecting groove on the upper part of the latch, and the lower part of the latch can be inserted into the locking hole on the unlocking rotating shaft to lock the rotation of the unlocking rotating shaft; the driving lever can drive the first cam to rotate, and drive the second shaft head through the first cam groove to cause the driving lever to lift the latch to release the rotation restriction of the unlocking rotating shaft.

[0011] Preferably, the unlocking device also includes a password reset assembly, which includes a second cam, which is sleeved on the shaft core and located below the first cam, and the lower part of the second cam is against the lock ring; the first spring is provided at the bottom of the mechanical password lock, and one end thereof is against the mechanical password lock, and the other end is against the shell; the second cam is provided with a second cam groove on the side facing the first cam, and a driving block is provided on the first cam, and the driving block is located on the second cam groove; after the lever is moved to release the rotation restriction of the unlocking rotation shaft, the lever is continued to be moved, and the driving block of the first cam presses the second cam down through the second cam groove to press the lock ring down to achieve password reset, and after the password is reset, the mechanical password lock is reset by the first spring.

[0012] Preferably, a positioning block is provided on the outer ring surface of the second cam, and a second guide groove for locking the second cam from rotating is provided on the housing, and the positioning block is slidably connected in the second guide groove.

[0013] Preferably, a positioning plate is further provided on the outer annular surface of the second cam, and the positioning plate is located on one side of the second cam groove; a threaded screw is provided on the housing, and the screw is located below the positioning plate.

[0014] Preferably, a protrusion is provided on the shaft core, a C-shaped ring is provided on the inner surface of the locking ring, and the protrusion is provided at the lower part of the C-shaped ring; when the lever is turned, the shaft core will move axially and the protrusion will be engaged in the notch of the C-shaped ring to determine the password.

[0015] Preferably, a buckle is provided on the outer surface of the locking ring, a rack is provided on the inner surface of the coding wheel, and the buckle is snapped onto the rack.

[0016] Preferably, the buckle includes a small buckle for fixing the coding wheel on the locking ring and a large buckle for adjusting the password positioning function, and the large buckle is slidably connected in the gap between the two racks; the length of the large buckle is longer than the small buckle, and the tops of the large buckle and the small buckle are at the same level.

[0017] Preferably, the connecting notch includes a protruding structure for fixing the lever and a recessed structure for steering the lever, the protruding structure is arranged on the left side of the connecting notch, and the recessed structure is arranged on the right side of the connecting notch.

[0018] Preferably, the first drive connection port is a hexagonal groove.

[0019] A second object of the present invention is to provide a method for using a mechanical combination lock, comprising the following steps:

[0020] (S1) First, turn the code adjustment wheel on the mechanical combination lock to the correct code position to unlock the axial movement of the shaft core;

[0021] (S2) Then, slide the unlocking push key to the right to make the inclined slot drive the first shaft head to lift the shaft core, so that the locking piece disengages from the locking slot and releases the rotation limit of the first cam;

[0022] (S3) Then, turn the lever to the left, and drive the second shaft head through the first cam groove to lift the driving lever and release the rotation limit of the unlocking rotating shaft;

[0023] (S4) Finally, insert the handle into the first driving connection port and rotate it clockwise. Drive the lock core to rotate through the connecting shaft arranged on the first driving connection port. At this time, the door lock can be opened.

[0024] Since the above technical solution is adopted in the present invention, the device can be set on an intelligent door lock. By turning the code adjustment wheel on the mechanical password lock to the correct password position, then sliding the unlocking push key to the right. At this time, the shaft core moves upward. The unlocking push key can make the inclined slot drive the first shaft head to lift the shaft core, so that the locking piece disengages from the locking slot and releases the rotation limit of the first cam. Continue to slide the lever, and the first cam drives the lever and the bolt to move upward. Finally, insert the handle into the first driving connection port and rotate it clockwise to drive the unlocking transmission output component to rotate and drive the transmission component to unlock the lock body of the intelligent door lock. It realizes that when you don't bring the key and can't enter the house with the password, by sliding this component of the mechanical lock password lock, the unlocking transmission output component rotates, and the door lock can be opened through the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 、 Figure 2 is an exploded structural schematic diagram of the novel intelligent door lock of the present invention.

[0026] Figure 3 is a structural schematic diagram of the mechanical unlocking component.

[0027] Figure 4 is a structural schematic diagram of the transmission component.

[0028] Figure 5 is an installation structural schematic diagram of the transmission component on the outer fixed sheet metal.

[0029] Figure 6 is a structural schematic diagram of the manual unlocking component.

[0030] Figure 7 is a structural schematic diagram of the mechanical password lock.

[0031] Figure 8 is a rear structural schematic diagram of the mechanical password lock.

[0032] Figure 9 、 Figure 10 is an internal structural schematic diagram of the mechanical password lock.

[0033] Figure 11 and 12 is a schematic structural view of a toggle lever drive assembly.

[0034] Figure 13 is a schematic structural view of a mechanical password lock.

[0035] Figure 14 and Figure 15 is a schematic structural view of a housing.

[0036] Figure 16 is a schematic structural view of a code adjustment wheel. Specific embodiments

[0037] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners are given, but the protection scope of the present invention is not limited to the following embodiments.

[0038] As Figure 1 and Figure 2 shown, a new type of intelligent door lock for mechanically assisted password unlocking of a door, the intelligent door lock includes a base 101, an inner fixed sheet metal 102, a lock body 103, an outer fixed sheet metal 104, an outer end cover 105, an intelligent unlocking component 106, a manual unlocking component 107 and a handle 113. The base 101 and the inner fixed sheet metal 102 are located inside the door, the outer end cover 105 and the outer fixed sheet metal 104 are located outside the door, the lock body 103 is arranged between the outer fixed sheet metal 104 and the inner fixed sheet metal 102, and the intelligent unlocking component 106 and the manual unlocking component 107 are arranged on the base 101 for unlocking the lock body 103. As Figure 3 shown, the door lock further includes a mechanical unlocking component 108 and a handle 109. The mechanical unlocking component 108 includes a mechanical password lock 110 and a transmission component 111 for driving the lock body 103 to unlock. The mechanical password lock 110 is fixedly arranged outside the outer fixed sheet metal 104, the transmission component 111 is arranged inside the inner fixed sheet metal 102, and the outer end cover 105 covers and is arranged outside the outer fixed sheet metal 104, and an opening cover 112 is opened at the position of the mechanical password lock 110 so that the mechanical password lock 110 can be exposed outside the outer end cover 105. As Figure 7 and Figure 8As shown in the figure, the mechanical password lock 110 includes a housing 1, a mechanical password lock 2, a toggle lever drive assembly 3, a cam unlocking assembly 4, and an unlocking transmission output assembly 5. The housing 1 is fixedly arranged on the outer fixed sheet metal 104, and the toggle lever drive assembly 3, the cam unlocking assembly 4, and the unlocking transmission output assembly 5 are installed on the housing 1. The mechanical password lock 2 is connected to the unlocking transmission output assembly 5. The mechanical password lock 2 locks or unlocks the rotation of the unlocking transmission output assembly 5. A first drive connection port 53 for driving by the handle 109 is arranged at the outer side end of the unlocking transmission output assembly 5, and a second connection port 54 is arranged at the inner side end. The second connection port 54 is in transmission connection with the transmission assembly 111. By driving the unlocking transmission output assembly 5 to rotate by the handle 109, the transmission assembly 111 is driven to unlock the lock body 103. The handle of the present invention can adopt a hex wrench, and the hex wrench can be stored in the opening cover 112 or can be arranged at other positions of the handle 113, which is convenient for the user to find.

[0039] As Figure 13 shown, the mechanical password lock 2 includes a shaft core 21, a lock machine ring 22, a plurality of code wheels 23, and a first spring for resetting the lock machine ring 22. The axial movement of the shaft core 21 is locked or unlocked through the cooperation of the lock machine ring 22 and the code wheels 23. An installation notch 11 is arranged in the housing 1, and the mechanical password lock 2 is fixedly arranged in the installation notch 11. A plurality of through slots 12 are arranged on the front panel of the housing 1, and a plurality of code wheels 23 are partially exposed outside the through slots 12 through the through slots 12. A convex block 26 is arranged on the shaft core 21, a C-shaped ring 25 is arranged on the inner surface of the lock machine ring 22, and the convex block 26 is arranged at the lower part of the C-shaped ring 25. When the toggle lever 32 is toggled, the shaft core 21 will perform axial movement, and the convex block 26 will be clamped in the notch of the C-shaped ring 25 to determine the password. A buckle 27 is arranged on the outer surface of the lock machine ring 22, and a rack 28 is arranged on the inner surface of the code wheel 23. The buckle 27 is clamped on the rack. The buckle 27 includes a small buckle 271 for fixing the code wheel 23 on the lock machine ring 22 and a large buckle 272 for adjusting the password positioning function. The large buckle 272 is slidably connected in the gap between the two racks 28. The length of the large buckle 272 is longer than that of the small buckle 271, and the tops of the large buckle 272 and the small buckle 271 are at the same horizontal level.

[0040] In the present invention, since the code wheel 23 is clamped on the buckle 27 through the rack 28 on its inner surface, when the code wheel 23 is rotated, the lock machine ring 22 will be driven to rotate together, so that the notch part of the C-shaped ring 25 is in the same vertical position. When the shaft core 21 moves upward later, the convex block 26 can be clamped in the notch of the C-shaped ring 25. When it is necessary to change the password of the mechanical password lock 2, since the length of the large buckle 272 is longer than that of the small buckle 271, it can perform a sliding movement in the gap between the two racks 28. At this time, the large buckle 272 replaces the small buckle 271 to perform the function of password positioning.

[0041] like Figures 9 - 10 As shown, the toggle lever drive assembly 3 includes a toggle lever 32 and a first cam 31. The first cam 31 is sleeved on the upper part of the shaft core 21. The first cam 31 is provided with a first cam groove 34. The toggle lever 32 is fixedly provided on the first cam 31 and can toggle the first cam 31 to rotate on the shaft core 21. A toggle lever groove 13 is provided on the front panel of the shell 1 at the position of the toggle lever 32, and the outer end of the toggle lever 32 is exposed from the toggle lever groove 13.

[0042] like Figures 9 - 10 As shown, the cam unlocking assembly 4 includes a locking piece 41, an unlocking push key 42 and a second spring 7 for resetting the unlocking push key 42. One side of the locking piece 41 is connected to the end of the shaft core 21 and is provided with a guide groove 14 on the housing 1. The outer end of the first cam 31 is radially provided with a locking groove 43. The other side of the locking piece 41 is located in the guide groove 14 and the locking groove 43 to lock the rotation of the first cam 31. The unlocking push key 42 is horizontally on the slideway inside the housing 1, and the outer side of the unlocking push key 42 has a protruding portion exposed from the housing. The push block 44 of the front panel is provided with an inclined groove 45 on its inner side. The end of the shaft core 21 is provided with a first shaft head facing the inclined groove 45, and the first shaft head is accommodated in the inclined groove 45. One end of the second spring 7 abuts the right end of the unlocking push key 42, and the other end of the second spring 7 abuts the housing 1. Driving the unlocking push key 42 can cause the inclined groove 45 to drive the first shaft head to lift the shaft core 21, so that the locking piece 41 disengages from the locking groove 43, releasing the rotation restriction of the first cam 31, and then the cam unlocking assembly 4 is reset by the second spring 7.

[0043] like Figures 9 - 10As shown, the unlocking transmission output assembly 5 includes a driving lever 50, a latch 51, an unlocking rotation shaft 52 and a third spring 8 for resetting the unlocking rotation shaft 52; the middle part of the driving lever 50 is hingedly arranged on the right side of the first cam 31, the latch 51 is vertically arranged on the slide inside the shell 1, and the unlocking rotation shaft 52 is arranged below the latch 51. The front end of the unlocking rotation shaft 52 is exposed to the front panel of the shell 1 and is provided with a first driving connection port 53 for connecting to the handle 109, and the rear end of the unlocking rotation shaft 52 is exposed to the rear panel of the shell 1 and is provided with a second connection port 54 for connecting to the transmission assembly 111; one end of the driving lever 50 is provided with a second shaft head 55, and the second shaft head 55 is accommodated in the first cam groove 34. The other end of the driving lever 50 is located in the connecting notch 56 on the upper part of the latch 51, and the lower part of the latch 51 can be inserted into the locking hole on the unlocking rotation shaft 52 to lock the rotation of the unlocking rotation shaft 52. A third spring 8 is provided in the unlocking rotating shaft 52, one end of the third spring 8 abuts against the latch 51, and the other end abuts against the inner wall of the unlocking rotating shaft 52; the driving lever 32 can drive the first cam 31 to rotate, and drive the second shaft head 55 through the first cam groove 34 to make the driving lever 50 lift the latch 51 to release the rotation restriction of the unlocking rotating shaft 52. After the unlocking device unlocks the lock cylinder, the unlocking transmission output assembly 5 is reset by the third spring 8.

[0044] like Figure 10 As shown, the connecting notch 56 includes a raised structure 57 for securing the lever 50 and a recessed structure 58 for steering the lever 50. The raised structure 57 is located on the left side of the connecting notch 56, and the recessed structure 58 is located on the right side of the connecting notch 56. After driving the toggle lever drive assembly 3 and the cam unlocking assembly 4, the lever 50 moves from the left end of the first cam groove 34 to the right end. Since the middle portion of the lever 50 is fixed to the housing, the lever 50 simultaneously performs a counterclockwise lifting motion and moves from the lower recessed structure 58 of the connecting notch 56 to the upper recessed structure 58, thereby driving the unlocking transmission output assembly 5, opening the lock cylinder and completing the unlocking. The first drive connection 53 is a hexagonal groove, and the lock cylinder can only be opened with a hexagonal wrench, ensuring the safety of the device.

[0045] To unlock the present invention, the code wheel 23 is turned until the correct number is directly above the housing 1. The protrusion 26 on the shaft core 21 is now directly below the notch in the C-shaped ring 25. Once the number is determined, the unlock push button 42 is moved rightward, causing the locking plate 41 to move axially. Because the slot 315 is arranged obliquely upward, moving the unlock push button 42 causes the shaft core 21 to move upward. As the shaft core 21 moves upward, the protrusion 26 on the shaft core 21 engages with the notch in the C-shaped ring 25.

[0046] At this time, the locking piece 41 clamped on the shaft core 21 will move upward from the first guiding groove 14, so that it completely disengages from the first guiding groove 14. When it is clamped in the first guiding groove 14, the toggle lever driving assembly 3 is stuck under its influence, thus affecting the rotation of the toggle lever 32. When the locking piece 41 is no longer clamped, the toggle lever 32 can rotate freely. At this time, the rotation angle of the toggle lever 32 is 60 - 70°, and at this moment, the state of the toggle lever 32 is the open state.

[0047] When the toggle lever 32 is in the open state, the lever 50 will move from the left end of the first cam groove 34 to the right end of the first cam groove 34. Since there is a slope 9 in the middle of the first cam groove 34, and the plane height at the left end is higher than the plane height at the right end, the lever 50 will perform a small-range counterclockwise lifting movement at one end.

[0048] After the movement of the lever 50 is completed, the rotation restriction of the unlocking rotating shaft 52 by the bolt 51 is released. The handle is inserted into the first driving connection port 53 of the unlocking rotating shaft 52, and the handle is rotated clockwise. At this time, the bolt 51 will rotate counterclockwise.

[0049] As Figures 3 - 5 shown, the transmission assembly 111 includes a connecting square shaft 114, a steering assembly 115 and a transmission rod 116; the steering assembly 115 includes a connecting shaft 117 and a connecting piece 118. The connecting shaft 117 is rotatably connected to the inner fixed sheet metal 102 directly behind the second connection port 54. One end of the connecting square shaft 114 is connected and arranged in the second connection port 54, and the other end passes through the outer fixed sheet metal 104 and is connected to the connecting shaft 117. The connecting shaft 117 passes through the inner fixed sheet metal 102 and is connected to the connecting piece 118; the transmission rod 116 is vertically arranged in the chute of the inner fixed sheet metal 102. The upper end of the transmission rod 116 is drivingly connected to the outer side end of the connecting piece 118. A hook portion 119 is arranged at the bottom of the transmission rod 116, and a convex strip 120 for connecting the hook portion 119 is arranged on the driving rotating shaft of the manual unlocking member 107; when the connecting square shaft 114 rotates, the transmission rod 116 can be lifted upward, and the hook portion 119 drives the convex strip 120 to rotate the driving rotating shaft 121 of the manual unlocking member 107 to unlock the lock body 103. As Figure 5 shown, a plurality of L-shaped limiting plates 124 are arranged on the inner fixed sheet metal 102. A notch is arranged on the L-shaped limiting plate 124. The transmission rod 116 is slidably arranged in the notch, and a vertical groove 125 is arranged at the lower part of the transmission rod 116. A sliding rod 126 is arranged on the inner fixed sheet metal 102, and the vertical groove 125 is arranged on the sliding rod 126; a horizontal groove 127 is arranged at the top of the transmission rod 116. A pull rod 128 is arranged at the outer side end of the connecting piece 118, and the pull rod 128 is located in the horizontal groove 127.

[0050] As Figure 4 、 Figure 5The bottom of the transmission rod 116 is provided with two left and right hooks 119; the left hook 119 is formed at the bottom of the transmission rod 116, and an L-shaped connector 122 is fixedly provided at the lower portion of the transmission rod 116, and the right hook 119 is formed at the right bottom of the L-shaped connector 122. Figure 6 As shown, a prismatic plate 123 is provided on the driving shaft 121 of the manual unlocking component 107, and the protrusion 120 is fixedly provided on one side of the prismatic plate 123. When changing the installation direction of the lock, the protrusion 120 of the prismatic plate 123 is turned in the other direction, and the right hook portion 119 hooks the protrusion 120 to conveniently change the installation direction of the lock.

[0051] like Figure 11 As shown, the mechanical combination lock 110 also includes a password resetting device, which includes a second cam 33 and a first spring. The second cam 33 is sleeved on the shaft core 21 and is located below the first cam 31. The lower part of the second cam 33 abuts against the lock ring 22. The first spring is provided at the bottom of the mechanical combination lock 2, and one end thereof abuts against the mechanical combination lock 2, and the other end abuts against the housing 1. The second cam 33 is provided with a second cam groove 35 on the side facing the first cam 31. A driving block 36 is provided on the first cam 31, and the driving block 36 is located on the second cam groove 35. After the lever 32 is moved to release the rotation restriction of the unlocking rotating shaft 52, the lever 32 is continued to be moved. The driving block 36 of the first cam 31 presses down the second cam 33 through the second cam groove 35 to press down the lock ring 22 to achieve password reset. After the password is reset, the mechanical combination lock 2 is reset by the first spring. According to Figure 2 and Figure 7 As shown, a positioning block 38 is provided on the outer ring surface of the second cam 33, and a second guide groove 39 is provided on the housing 1 to lock the rotation of the second cam 33. The second cam 33 is slidably connected to the second guide groove 39 of the housing 1 through the positioning block 38, which can effectively move the driving block 36 from the second cam groove 35 to the side where the second cam 33 abuts against the first cam 31. At this time, the second cam 33 will only move axially, which can ensure the stability of the device and make password reset more convenient. Figure 1 and Figure 2 As shown, a positioning plate 331 is further provided on the outer ring surface of the second cam 33, and the positioning plate 331 is located on one side of the second cam groove 35; a threaded screw 15 is provided on the housing 1, and the screw 15 is located below the positioning plate 331; when the lever 32 drives the second cam 33 to reset the password, the second cam 33 will perform axial movement, and at this time the positioning plate 331 will abut against the screw 15 to prevent the password from being changed.

[0052] By adding a password reset device to the unlocking device, customers can set their desired passwords according to their own needs. By toggling the lever 32, the driving block 36 on the first cam 31 moves from the right end to the left end of the second cam groove 35. When the rotation restriction of the unlocking rotating shaft 52 is removed, continue to toggle the lever 32, and the driving block 36 will move out of the second cam groove 35, thereby pressing down the second cam 33. Since the second cam 33 abuts against the locking ring 22, when the second cam 33 moves axially, the locking ring 22 will also perform the same axial movement, so that the mechanical password lock 2 can be driven to perform the password reset work.

[0053] By adding a screw 15 to the lower part of the lever 32 and setting it near the lower part of the positioning plate 331, the movement of the positioning plate 331 is restricted; when the password needs to be changed, remove the screw 15. When the lever 32 is rotated, the driving block 36 will slide from the right end to the left end of the second cam groove 35 and move out of the second cam groove 35 through the inclined slope 37. At this time, the rotation angle of the lever 32 is 90°-110°.

[0054] Since the bottom end of the second ring portion abuts against the locking ring 22, when the driving block 36 moves out of the second cam groove 35, the locking ring 22 will also move downward, and at this time, the password can be freely rotated and changed.

[0055] The above is the description of the embodiments of the present invention. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel points disclosed herein.

Claims

1. A mechanical password unlocking device for a door lock, characterized in that, The unlocking device comprises: a housing (1), a mechanical password lock (2), a toggle lever driving assembly (3), a cam unlocking assembly (4), and an unlocking transmission output assembly (5); the toggle lever driving assembly (3), the cam unlocking assembly (4), and the unlocking transmission output assembly (5) are mounted on the housing (1); The mechanical combination lock (2) comprises a shaft core (21), a locking ring (22) and a plurality of code adjustment wheels (23), and the axial movement of the shaft core (21) is locked or unlocked by cooperating with the locking ring (22) and the code adjustment wheel (23); a mounting notch (11) is provided in the housing (1), the mechanical combination lock (2) is fixedly provided in the mounting notch (11), and a plurality of through slots (12) are provided on the front panel of the housing (1), and the plurality of code adjustment wheels (23) are partially exposed outside the through slots (12) through the through slots (12); The toggle lever driving assembly (3) includes a toggle lever (32) and a first cam (31), wherein the first cam (31) is sleeved on the upper portion of the shaft core (21), and a first cam groove (34) is provided on the first cam (31). The toggle lever (32) is fixedly provided on the first cam (31) and can toggle the first cam (31) to rotate on the shaft core (21), and a toggle lever groove (13) is provided on the front panel of the housing (1) at the position of the toggle lever (32), and the outer end of the toggle lever (32) is exposed from the toggle lever groove (13); The cam unlocking assembly (4) includes a locking piece (41), an unlocking push key (42) and a second spring (7) for resetting the unlocking push key (42). One side of the locking piece (41) is connected to the end of the shaft core (21), and a guide groove (14) is provided on the housing (1). The outer end of the first cam (31) is radially provided with a locking groove (43). The other side of the locking piece (41) is located in the guide groove (14) and the locking groove (43) to lock the rotation of the first cam (31); the unlocking push key ( 42) is disposed transversely on the slideway inside the housing (1), and the outer side of the unlocking push key (42) has a push block (44) exposed from the front panel of the housing (1), and an inclined groove (45) is provided on the inner side. The end of the shaft core (21) is provided with a first shaft head facing the inclined groove (45), and the first shaft head is accommodated in the inclined groove (45); driving the unlocking push key (42) can cause the inclined groove (45) to drive the first shaft head to lift the shaft core (21), so that the locking piece (41) is disengaged from the locking groove (43), and the rotation restriction of the first cam (31) is released; The unlocking transmission output assembly (5) includes a driving lever (50), a latch (51), an unlocking rotating shaft (52) and a third spring (8) for resetting the latch (51); the middle part of the driving lever (50) is hingedly arranged on the right side of the first cam (31), the latch (51) is vertically arranged on a slideway inside the housing (1), the unlocking rotating shaft (52) is arranged below the latch (51), the front end of the unlocking rotating shaft (52) is exposed from the front panel of the housing (1) and is provided with a first driving connection port (53) for connecting to a handle, and the rear end of the unlocking rotating shaft (52) is exposed from the rear panel of the housing (1) and is provided with a second connection port (54) for driving the door lock to unlock; ... A second shaft head (55) is provided at one end of the rod (50), and the second shaft head (55) is accommodated in the first cam groove (34). The other end of the driving lever (50) is located in the connecting notch (56) at the upper part of the latch (51), and the lower part of the latch (51) can be inserted into the locking hole on the unlocking rotating shaft (52) to lock the rotation of the unlocking rotating shaft (52); the other end of the unlocking rotating shaft (52) abuts against the inner wall of the unlocking rotating shaft (52); the driving lever (32) can shift the first cam (31) to rotate, and drive the second shaft head (55) through the first cam groove (34) to make the driving lever (50) lift the latch (51) and release the rotation restriction of the unlocking rotating shaft (52).

2. The mechanical password unlocking device for a door lock according to claim 1, wherein, The unlocking device further includes a password resetting component, which includes a second cam (33), which is sleeved on the shaft core (21) and located below the first cam (31), and the lower part of the second cam (33) abuts against the lock ring (22); a first spring (6) is provided at the bottom of the mechanical password lock (2), one end of the first spring (6) abuts against the mechanical password lock (2), and the other end abuts against the housing (1); a second cam groove (35) is provided on the side of the second cam (33) facing the first cam (31), and a driving block (36) is provided on the first cam (31), and the driving block (36) is located on the second cam groove (35); after the lever (32) is moved to release the rotation restriction of the unlocking rotating shaft (52), the lever (32) is continued to be moved, and the driving block (36) of the first cam (31) presses down the second cam (33) through the second cam groove (35), so that the lock ring (22) is pressed down to achieve password resetting.

3. The mechanical password unlocking device for a door lock according to claim 2, characterized in that A positioning block (38) is provided on the outer ring surface of the second cam (33), and a second guide groove (39) for locking the second cam (33) from rotating is provided on the housing (1), and the positioning block (38) is slidably connected in the second guide groove (39).

4. A mechanical password unlocking device for a door lock according to claim 2 or 3, characterized in that A positioning plate (331) is further provided on the outer ring surface of the second cam (33), and the positioning plate (331) is located on one side of the second cam groove (35); a screw (15) connected by a thread is provided on the housing (1), and the screw (15) is located below the positioning plate (331).

5. The mechanical password unlocking device for a door lock according to claim 1, characterized in that, The shaft core (21) is provided with a protrusion (26), the inner surface of the locking ring (22) is provided with a C-shaped ring (25), and the protrusion (26) is provided at the lower part of the C-shaped ring (25); when the lever (32) is toggled, the shaft core (21) moves axially and engages the protrusion (26) in the notch of the C-shaped ring (25) for determining the password.

6. The mechanical password unlocking device for a door lock according to claim 1, wherein A buckle (27) is provided on the outer surface of the locking ring (22), a rack (28) is provided on the inner surface of the coding wheel (23), and the buckle (27) is clamped on the rack.

7. The mechanical password unlocking device for a door lock according to claim 6, characterized in that, The buckle (27) comprises a small buckle (271) for fixing the code adjustment wheel (23) on the locking ring (22) and a large buckle (272) for adjusting the password positioning function, wherein the large buckle (272) is slidably connected in the gap between the two racks (28); wherein the length of the large buckle (272) is longer than the small buckle (271), and the tops of the large buckle (272) and the small buckle (271) are at the same level.

8. A mechanical password unlocking device for a door lock according to claim 1, characterized in that, The connecting notch (56) comprises a protruding structure (57) for fixing the lever (50) and a recessed structure (58) for turning the lever (50), wherein the protruding structure (57) is arranged on the left side of the connecting notch (56), and the recessed structure (58) is arranged on the right side of the connecting notch (56).

9. A mechanical password unlocking device for a door lock according to claim 1, characterized in that, The first drive connection port (53) is a hexagonal groove.

10. A method for using a mechanical password unlocking device for a door lock, characterized in that, The method adopts a mechanical password unlocking device for a door lock according to any one of claims 1 to 9, and the method comprises the following steps: (S1) First, the code adjustment wheel (23) on the mechanical code lock (2) is turned to the position of the correct code, thereby unlocking the axial movement of the shaft core (21); (S2) Then, the unlocking push key (42) is toggled to the right, so that the inclined groove (45) drives the first shaft head to lift the shaft core (21) so that the locking piece (41) is disengaged from the locking groove (43) and the rotation restriction of the first cam (31) is released; (S3) rotating the lever (32) to the left again, driving the second shaft head (55) through the first cam groove (34) to cause the driving lever (50) to lift the latch (51) and release the rotation restriction of the unlocking rotation shaft (52); (S4) Finally, the handle is inserted into the first drive connection port (53), and is rotated clockwise. The lock core is driven to rotate by the connecting shaft provided on the first drive connection port (53), and the door lock can be opened.

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