Password unlocking device for door lock and door lock

Abstract

The utility model provides a password unlocking device for a door lock and the door lock, and the password unlocking device for the door lock comprises a mounting bracket; the unlocking knob is rotatably arranged on the mounting bracket; the transmission shaft is rotatably arranged on the mounting bracket and is used for connecting the lock cylinder; the clutch assembly is arranged between the unlocking knob and the transmission shaft and can connect or disconnect the unlocking knob and the transmission shaft; the password disk assembly comprises a plurality of password sheets, and the password sheets can rotate relatively, so that the password disk assembly is switched between an unlocking state and a locking state; when the password disc assembly is in an unlocking state, the clutch assembly is connected with the unlocking knob and the transmission shaft, so that the unlocking knob can drive the transmission shaft to rotate; and when the password disc assembly is in a locked state, the clutch assembly disconnects the unlocking knob and the transmission shaft, so that the unlocking knob can idle relative to the transmission shaft. The unlocking convenience can be improved, and meanwhile the structure is simpler and miniaturized.

Description

Technical Field

[0001] This application relates to the field of lock technology, and more specifically, to a password unlocking device for a door lock and a door lock. Background Technology

[0002] Currently, there are two main mechanical unlocking methods for door locks on the market: pin tumbler lock cylinder unlocking and Morse code unlocking. Pin tumbler lock cylinder unlocking requires a physical key, which is inconvenient to carry and easy to lose. Morse code unlocking is structurally complex and takes up more space. Utility Model Content

[0003] This application provides a password unlocking device and a door lock, which can improve the convenience of unlocking, while also making the structure simpler and smaller.

[0004] In a first aspect, embodiments of this application provide a combination unlocking device for a door lock, comprising: a mounting bracket; an unlocking knob rotatably disposed on the mounting bracket; a drive shaft rotatably disposed on the mounting bracket for connecting a lock cylinder; a clutch assembly disposed between the unlocking knob and the drive shaft, enabling the unlocking knob to connect or disconnect from the drive shaft; and a combination dial assembly comprising a plurality of combination plates, the plurality of combination plates being rotatable relative to each other to switch the combination dial assembly between an unlocked state and a locked state; wherein, when the combination dial assembly is in the unlocked state, the clutch assembly connects the unlocking knob and the drive shaft, enabling the unlocking knob to drive the drive shaft to rotate; when the combination dial assembly is in the locked state, the clutch assembly disconnects the unlocking knob and the drive shaft, enabling the unlocking knob to rotate freely relative to the drive shaft.

[0005] The combination lock assembly switches between unlocked and locked states by rotating multiple key plates relative to each other. When the combination lock assembly is in the unlocked state, the clutch assembly connects the unlock knob and the drive shaft, allowing the unlock knob to drive the drive shaft to rotate. When the combination lock assembly is in the locked state, the clutch assembly disconnects the unlock knob from the drive shaft, allowing the unlock knob to rotate freely relative to the drive shaft. This facilitates unlocking and improves unlocking convenience. Compared to Morse code unlocking, the structure is simpler, more reliable, and more compact.

[0006] In some embodiments, the unlocking knob is provided with a clutch groove; the drive shaft is provided with a clutch through hole, the position of which corresponds to the position of the clutch groove; the clutch assembly includes a clutch ball and a clutch lever, the clutch ball is movably disposed in the clutch through hole, and the clutch lever is rotatably disposed in the mounting bracket; when the keypad assembly is in the unlocked state, the clutch lever is in a first position preventing the clutch ball from exiting the clutch groove, and the unlocking knob can drive the drive shaft to rotate via the clutch ball; when the keypad assembly is in the locked state, the clutch lever is in a second position allowing the clutch ball to exit the clutch groove, and the unlocking knob can rotate freely relative to the drive shaft.

[0007] The unlocking knob drives the drive shaft to rotate and unlock by preventing or allowing the clutch ball to exit the clutch slot through a clutch lever. Alternatively, the unlocking knob can be made to rotate freely without unlocking. This method can prevent forced unlocking, improve security performance, and has a simple and reliable structure.

[0008] In some embodiments, the unlocking knob includes a rotating shaft, and the clutch groove is disposed on the outer peripheral surface of the rotating shaft; the transmission shaft is provided with a shaft hole, and the transmission shaft is sleeved on the rotating shaft through the shaft hole; the outer peripheral surface of the transmission shaft is provided with a clutch through hole, and one end of the clutch through hole extends to the hole wall of the shaft hole.

[0009] In some embodiments, the rotating shaft and the transmission shaft are coaxially arranged; the mounting bracket is sleeved on the rotating shaft and the transmission shaft, the mounting bracket is provided with a clearance hole, the clearance hole penetrates the outer peripheral surface and the inner peripheral surface of the mounting bracket, and the position of the clearance hole corresponds to the position of the clutch through hole; the clutch lever has a limiting end that blocks the clutch ball, and the clearance hole is used to avoid the limiting end.

[0010] By providing clearance holes in the mounting bracket to avoid the limiting end of the clutch lever, it can not only prevent the clutch ball from exiting the clutch groove when the keypad assembly is in the unlocked state, but also prevent the clutch ball from disengaging from the clutch through hole when the keypad assembly is in the locked state, thereby improving reliability.

[0011] In some embodiments, the clutch lever includes a first lever arm and a second lever arm, the fulcrum of the clutch lever is located at the connection between the first lever arm and the second lever arm; the end of the first lever arm away from the second lever arm is the limiting end, and the elastic element is disposed between the second lever arm and the mounting bracket, for driving the clutch lever to rotate from the second position to the first position when the keypad assembly is in the unlocked state.

[0012] By using an elastic element between the second lever arm and the mounting bracket, the second lever arm can be rotated more smoothly from the second position to the first position, thus improving unlocking reliability.

[0013] In some embodiments, each of the key pieces has an unlocking groove on its edge; when the key plate assembly is in the unlocked state, the unlocking grooves of the plurality of key pieces are aligned, and the elastic element drives the second lever arm into the plurality of unlocking grooves; when the key plate assembly is in the locked state, the unlocking grooves of at least two key pieces are misaligned, and the second lever arm exits the plurality of unlocking grooves.

[0014] In some embodiments, the unlocking groove includes a bottom surface and two side surfaces, wherein at least one side surface is an inclined surface; during the process of the keypad assembly switching from the unlocked state to the locked state, the inclined surface pushes the clutch lever to rotate, so that the clutch lever exits the unlocking groove.

[0015] With at least one groove having a sloping side, rotating the turntable can easily disengage the clutch lever from the unlocking groove, while simultaneously misaligning multiple unlocking grooves, making operation convenient and the structure simple.

[0016] In some embodiments, the cipher chip includes a first cipher chip, a second cipher chip, and a third cipher chip; the first cipher chip is provided with a first actuating element, the second cipher chip is provided with a second actuating element, and the third cipher chip is provided with a third actuating element; the first cipher chip moves the second actuating element through the first actuating element to drive the second cipher chip to rotate; the second cipher chip moves the third actuating element through the second actuating element to drive the third cipher chip to rotate.

[0017] The first PIN chip moves the second PIN chip via the first actuating element, which in turn moves the second PIN chip. The second PIN chip moves the third PIN chip via the second actuating element, which in turn moves the third PIN chip. This design allows the first, second, and third unlocking grooves to be easily aligned or misaligned, thereby achieving unlocking and locking. The structure is simple and reliable.

[0018] In some embodiments, the second cipher plate is provided with a plurality of first mounting holes distributed circumferentially thereon, the plurality of first mounting holes being used to selectively mount the second actuating member, so that the mounting position of the second actuating member on the second cipher plate is adjustable, thereby allowing the cipher of the cipher disk assembly to be changed; and / or, the third cipher plate is provided with a plurality of second mounting holes distributed circumferentially thereon, the plurality of second mounting holes being used to selectively mount the third actuating member, so that the mounting position of the third actuating member on the third cipher plate is adjustable, thereby allowing the cipher of the cipher disk assembly to be changed.

[0019] Therefore, the password disk component has the function of changing passwords, and changing passwords is more convenient and flexible.

[0020] Secondly, embodiments of this application also provide a door lock, including: a lock cylinder; a password unlocking device for the door lock as described in any of the embodiments of the first aspect above, wherein the drive shaft is connected to the lock cylinder. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0022] Figure 1 Exploded view of a password unlocking device for a door lock provided in some embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the mounting bracket provided in some embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the turntable provided in some embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the clutch lever provided in some embodiments of this application;

[0026] Figure 5 The following is a structural cross-section of a password disk assembly in an unlocked state according to some embodiments of this application, wherein the clutch lever is in a first position;

[0027] Figure 6 A cross-sectional view of a keypad assembly in a locked state provided in some embodiments of this application, wherein the clutch lever is in a second position;

[0028] Figure 7 The diagram shows the structure of a door lock provided in some embodiments of this application.

[0029] Figure label:

[0030] 100 - Password unlocking device; 200 - Door lock; 210 - Lock cylinder; 211 - Lock plate; 220 - Front lock; 230 - Rear lock; 240 - Keyhole cover;

[0031] 10-Mounting bracket; 11-Allowing hole; 12-Limiting hole; 13-Second pin hole; 14-First pin hole; 15-Change code hole; 16-Fixing hole;

[0032] 20 - Unlock knob; 21 - Handle; 22 - Rotation shaft; 23 - Clutch groove; 24 - First limit slot;

[0033] 30-Drive shaft; 31-Shaft hole; 32-Clutch through hole; 33-Second limit slot; 34-Limit screw; 35-Locking plate slot;

[0034] 40-Clutch assembly; 41-Clutch ball; 42-Clutch lever; 42a-Limiting end; 43-Elastic element; 44-Second round pin; 421-First lever arm; 422-Second lever arm; 423-Rotating hole;

[0035] 50 - Password disc assembly; 51 - Password piece; 52 - Unlocking groove; 53 - Turntable; 55 - Retaining ring; 511 - First password piece; 512 - Second password piece; 512a - First mounting hole; 513 - Third password piece; 513a - Second mounting hole; 521 - First unlocking groove; 521a - Groove bottom; 521b - Groove side; 522 - Second unlocking groove; 523 - Third unlocking groove; 531 - Turntable body; 531a - Rotation position; 532 - Bushing; 533 - Positioning pin; 534 - Third limiting slot; 541 - First actuating element; 542 - Second actuating element; 543 - Third actuating element;

[0036] 60-Bearing;

[0037] 70 - First round pin;

[0038] 80 - Mounting screws. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] Reference Figures 1 to 7 This application provides a door lock password unlocking device 100, including a mounting bracket 10, an unlocking knob 20, a drive shaft 30, a clutch assembly 40, and a password disk assembly 50. The unlocking knob 20 is rotatably mounted on the mounting bracket 10; the drive shaft 30 is rotatably mounted on the mounting bracket 10 and is used to connect to the lock cylinder 210. Figure 7 (As shown); the clutch assembly 40 is disposed between the unlock knob 20 and the drive shaft 30, which can connect or disconnect the unlock knob 20 and the drive shaft 30; the keypad assembly 50 includes a plurality of keypad pieces 51, which can rotate relative to each other, so that the keypad assembly 50 is in the unlocked state (as shown); Figure 5 (as shown) and locked state ( Figure 6 Switching between (as shown). When the keypad assembly 50 is in the unlocked state, the clutch assembly 40 connects the unlock knob 20 and the drive shaft 30 so that the unlock knob 20 can drive the drive shaft 30 to rotate; when the keypad assembly 50 is in the locked state, the clutch assembly 40 disconnects the unlock knob 20 and the drive shaft 30 so that the unlock knob 20 can rotate freely relative to the drive shaft 30.

[0045] The password unlocking device 100 can be fixed to the front lock of the door lock by the mounting bracket 10. Figure 7 (As shown). The mounting bracket 10 provides support and fixation for components such as the unlocking knob 20, drive shaft 30, clutch assembly 40, and keypad assembly 50.

[0046] The unlocking knob 20 is used by the user to apply external force to perform the unlocking operation. The drive shaft 30 is used to connect to the lock cylinder 210, for example, the drive shaft 30 is connected to the lock cylinder 210 through the lock plate 211 to perform the unlocking operation.

[0047] The multiple keypads 51 in the keypad assembly 50 can rotate relative to each other. When the multiple keypads 51 have rotated to their respective positions, the keypad assembly 50 is in the unlocked state. Figure 5 As shown), at this time, the clutch assembly 40 can connect the unlocking knob 20 and the drive shaft 30, so that the power of the unlocking knob 20 when it rotates is transmitted to the drive shaft 30, thereby driving the drive shaft 30 to rotate and unlocking; when the multiple key pieces 51 rotate relative to each other until at least one key piece 51 is not in position, the keypad assembly 50 is in the locked state. Figure 6 As shown), at this time, the clutch assembly 40 can disconnect the unlocking knob 20 and the drive shaft 30 so that the power of the unlocking knob 20 when it rotates cannot be transmitted to the drive shaft 30. Thus, the unlocking knob 20 rotates freely relative to the drive shaft 30, while the drive shaft 30 does not rotate and cannot be unlocked.

[0048] The combination lock assembly 50 switches between unlocked and locked states by rotating multiple combination plates 51 relative to each other. When the combination lock assembly 50 is in the unlocked state, the clutch assembly 40 connects the unlocking knob 20 and the drive shaft 30 so that the unlocking knob 20 can drive the drive shaft 30 to rotate. When the combination lock assembly 50 is in the locked state, the clutch assembly 40 disconnects the unlocking knob 20 and the drive shaft 30 so that the unlocking knob 20 can rotate freely relative to the drive shaft 30, thereby facilitating unlocking and improving unlocking convenience. At the same time, compared with the Morse code unlocking method, the structure is simpler, more reliable, and more compact.

[0049] In some embodiments, refer to Figure 1 The unlocking knob 20 includes a rotating shaft 22, and a clutch groove 23 is provided on the outer circumferential surface of the rotating shaft 22. The transmission shaft 30 is provided with a clutch through hole 32, the position of which corresponds to the position of the clutch groove 23. The clutch assembly 40 includes a clutch ball 41 and a clutch lever 42. The clutch ball 41 is movably disposed in the clutch through hole 32, and the clutch lever 42 is rotatably disposed on the mounting bracket 10. When the keypad assembly 50 is in the unlocked state, the clutch lever 42 is in the first position preventing the clutch ball 41 from exiting the clutch groove 23. Figure 5 As shown), the unlocking knob 20 can drive the drive shaft 30 to rotate via the clutch bead 41. When the keypad assembly 50 is in the locked state, the clutch lever 42 is in the second position that allows the clutch bead 41 to disengage from the clutch slot 23. Figure 6 As shown), the unlocking knob 20 can rotate freely relative to the drive shaft 30.

[0050] As an example, the unlocking knob 20 also includes a handle 21, one end of which is connected to the rotating shaft 22. The handle 21 is for the user to hold in order to rotate the unlocking knob 20.

[0051] As an example, the outer peripheral surface of the rotating shaft 22 is also provided with a first limiting groove 24, and a first round pin 70 is provided on both sides of the first limiting groove 24. The first round pin 70 is inserted into the first pin hole 14 of the mounting bracket 10. The first round pin 70 restricts the axial displacement of the rotating shaft 22 and enables the rotating shaft 22 to rotate around its axis.

[0052] As an example, the drive shaft 30 is provided with a shaft hole 31, and the drive shaft 30 is sleeved on the rotating shaft 22 through the shaft hole 31. The outer peripheral surface of the drive shaft 30 is provided with a clutch through hole 32, and one end of the clutch through hole 32 extends to the hole wall of the shaft hole 31.

[0053] As an example, the outer circumferential surface of the drive shaft 30 is also provided with an annular second limiting groove 33. The position of the second limiting groove 33 corresponds to the position of the limiting hole 12 on the mounting bracket 10. A limiting screw 34 is installed in the limiting hole 12, and one end of the limiting screw 34 extends into the second limiting groove 33, thereby preventing the drive shaft 30 from coming off the mounting bracket 10 without restricting the rotation of the drive shaft 30. A locking groove 35 can also be provided at the end of the drive shaft 30 away from the rotating shaft 22. Figure 5 As shown), the drive shaft 30 connects with the locking plate 211 via the locking plate groove 35. Figure 7 (As shown) connection.

[0054] The clutch lever 42 can be rotatably connected by inserting the second round pin 44 into the second pin hole 13 of the mounting bracket 10.

[0055] When the clutch lever 42 is in the first position preventing the clutch ball 41 from exiting the clutch groove 23 ( Figure 5 When the unlocking knob 20 is rotated, the clutch ball 41 is held in the clutch through hole 32 and the clutch groove 23. The clutch ball 41 engages with the clutch groove 23, so that the power of the unlocking knob 20 is transmitted to the transmission shaft 30 through the clutch ball 41, thereby driving the transmission shaft 30 to rotate, so as to drive the lock cylinder 210 to rotate and achieve unlocking.

[0056] When the clutch lever 42 is in the second position that allows the clutch ball 41 to exit the clutch groove 23 ( Figure 6 When the unlocking knob 20 is rotated, the rotating shaft 22 forces the clutch ball 41 to disengage from the clutch groove 23. The clutch ball 41 and the clutch groove 23 cannot engage, causing the unlocking knob 20 to rotate freely relative to the drive shaft 30. The drive shaft 30 cannot rotate and cannot be unlocked.

[0057] The unlocking knob 20 drives the transmission shaft 30 to rotate and unlock by preventing or allowing the clutch ball 41 to exit the clutch groove 23 through the clutch lever 42, and also makes the unlocking knob 20 spin freely and unable to unlock. This can avoid forced unlocking, improve protection performance, and the structure is simple and reliable.

[0058] In some embodiments, the rotating shaft 22 and the transmission shaft 30 are coaxially arranged; the mounting bracket 10 is sleeved on the rotating shaft 22 and the transmission shaft 30, and the mounting bracket 10 is provided with a clearance hole 11, which penetrates the outer and inner peripheral surfaces of the mounting bracket 10, and the position of the clearance hole 11 corresponds to the position of the clutch through hole 32; the clutch lever 42 has a limiting end 42a that blocks the clutch ball 41. Figure 4 As shown), the clearance hole 11 is used to avoid the limiting end 42a.

[0059] As an example, when the combination lock assembly 50 is in the unlocked state, the limiting end 42a of the clutch lever 42 can extend into the clearance hole 11 to hold the clutch ball 41 in the clutch through hole 32 and the clutch groove 23, so that the unlocking knob 20 can drive the drive shaft 30 to rotate through the clutch ball 41. When the combination lock assembly 50 is in the locked state, the limiting end 42a of the clutch lever 42 prevents the clutch ball 41 from disengaging from the clutch through hole 32. When the unlocking knob 20 is rotated, it forces the clutch ball 41 out of the clutch groove 23, for example, so that part of the clutch ball 41 is in the clearance hole 11 and part is in the clutch groove 23, so that the unlocking knob 20 can rotate freely relative to the drive shaft 30.

[0060] By providing a clearance hole 11 on the mounting bracket 10 to avoid the limiting end 42a of the clutch lever 42, it can not only prevent the clutch ball 41 from exiting the clutch groove 23 when the keypad assembly 50 is in the unlocked state, but also prevent the clutch ball 41 from disengaging from the clutch through hole 32 when the keypad assembly 50 is in the locked state, thereby improving reliability.

[0061] In some embodiments, refer to Figure 1 and Figure 4 The clutch lever 42 includes a first lever arm 421 and a second lever arm 422. The fulcrum of the clutch lever 42 is located at the connection between the first lever arm 421 and the second lever arm 422. The end of the first lever arm 421 away from the second lever arm 422 is a limiting end 42a. The clutch assembly 40 also includes an elastic element 43, which is disposed between the second lever arm 422 and the mounting bracket 10. When the keypad assembly 50 is in the unlocked state, the elastic element 43 drives the clutch lever 42 to rotate from the second position to the first position.

[0062] By using the elastic element 43 between the second lever arm 422 and the mounting bracket 10, the second lever arm 422 can be rotated more smoothly from the second position to the first position, thus improving the reliability of unlocking.

[0063] In some embodiments, the clutch assembly 40 further includes an elastic element 43 disposed between the mounting bracket 10 and the clutch lever 42, for driving the clutch lever 42 to rotate from the second position to the first position when the keypad assembly 50 is in the unlocked state.

[0064] The elastic element 43 can drive the clutch lever 42 from the second position to the first position by elastic force. Alternatively, it can drive the clutch lever 42 from the second position to the first position by elastic restoring force. An embodiment of this application illustrates an example of the elastic element 43 driving the clutch lever 42 from the second position to the first position by elastic force. The elastic element 43 can be a spring.

[0065] By using the elastic element 43 to drive the clutch lever 42 to rotate from the second position to the first position, the clutch lever 42 can rotate flexibly, improving the reliability of unlocking.

[0066] In some embodiments, each keypad 51 has an unlocking groove 52 on its edge; when the keypad assembly 50 is in the unlocked state, the unlocking grooves 52 of the multiple keypads 51 are aligned, and the elastic member 43 drives the second lever arm 422 into the multiple unlocking grooves 52; when the keypad assembly 50 is in the locked state, the unlocking grooves 52 of at least two keypads 51 are misaligned, and the second lever arm 422 exits from the multiple unlocking grooves 52.

[0067] When unlocking is required, the multiple key pieces 51 rotate relative to each other until their respective unlocking grooves 52 are aligned. At this point, the elastic element 43 drives the second lever arm 422 into the multiple unlocking grooves 52, and the limiting end 42a of the first lever arm 421 tilts up, preventing the clutch ball 41 from exiting the clutch groove 23. That is, the clutch lever 42 is in the first position preventing the clutch ball 41 from exiting the clutch groove 23. Figure 5 As shown, the power of rotating the unlocking knob 20 is transmitted to the drive shaft 30 through the clutch ball 41, thereby driving the drive shaft 30 to rotate, which in turn drives the lock cylinder 210 to rotate and unlock.

[0068] After unlocking, the multiple key pieces 51 rotate relative to each other, causing the unlocking grooves 52 of at least two key pieces 51 to misalign. At this time, the second lever arm 422 disengages from the unlocking groove 52. For example, the second lever arm 422 can abut against the edge of the key piece 51. The limiting end 42a of the first lever arm 421 retracts, allowing the clutch bead 41 to exit the clutch groove 23. That is, the clutch lever 42 is in the second position that allows the clutch bead 41 to exit the clutch groove 23. Figure 6As shown, when the unlocking knob 20 is rotated, the rotating shaft 22 forces the clutch ball 41 to disengage from the clutch groove 23. The clutch ball 41 and the clutch groove 23 cannot engage, so the power of the unlocking knob 20 cannot be transmitted to the transmission shaft 30. As a result, the unlocking knob 20 rotates freely relative to the transmission shaft 30, while the transmission shaft 30 cannot rotate and cannot drive the lock cylinder 210 to unlock.

[0069] In some embodiments, the combination disk assembly 50 further includes a turntable 53, which includes a turntable body 531 and a bushing 532. The bushing 532 is rotatably fitted onto the rotating shaft 22, and one end of the bushing 532 is connected to the turntable body 531. A plurality of combination pieces 51 include a first combination piece 511 and a second combination piece 512. The first combination piece 511 is fixedly fitted onto the bushing 532, and the second combination piece 512 is rotatably fitted onto the bushing 532. The first combination piece 511 is located on the side of the turntable body 531 opposite to the handle 21, and the second combination piece 512 is located on the side of the first combination piece 511 opposite to the turntable body 531. The first combination piece 511 can rotate with the turntable 53 and drive the second combination piece 512 to rotate, so that the first unlocking groove 521 of the first combination piece 511 and the second unlocking groove 522 of the second combination piece 512 are aligned or misaligned.

[0070] The bushing 532 is rotatably fitted onto the rotating shaft 22 so that the turntable 53 can rotate relative to the unlocking knob 20, that is, the turntable 53 and the unlocking knob 20 can rotate independently.

[0071] As an example, refer to Figure 1 A protruding rotating part 531a can be provided on the side of the turntable body 531 near the handle 21 to facilitate the user to rotate the turntable 53.

[0072] Reference Figure 3 A positioning post 533 may be provided on the side of the turntable body 531 away from the handle 21, and the first password piece 511 is fixedly sleeved on the bushing 532 through the positioning post 533.

[0073] As an example, when unlocking is required, the turntable 53 can be rotated (e.g., clockwise). The first password piece 511 rotates with the turntable 53 and drives the second password piece 512 to rotate. When the second unlocking groove 522 of the second password piece 512 is in place, the turntable 53 is rotated in the opposite direction (e.g., counterclockwise). The first password piece 511 rotates with the turntable 53. When the first unlocking groove 521 of the first password piece 511 is in place, the turntable 53 stops rotating. At this time, the first unlocking groove 521 and the second unlocking groove 522 are aligned. The elastic element 43 drives the clutch lever 42 into the first unlocking groove 521 and the second unlocking groove 522. The clutch lever 42 is in the first position that prevents the clutch ball 41 from exiting the clutch groove 23. Figure 5As shown, the power of rotating the unlocking knob 20 is transmitted to the drive shaft 30 through the clutch ball 41, thereby driving the drive shaft 30 to rotate, which in turn drives the lock cylinder 210 to rotate and unlock.

[0074] After unlocking, the first unlocking groove 521 and the second unlocking groove 522 can be misaligned by rotating the turntable 53 (e.g., rotating it one full turn), that is, the positions of the first unlocking groove 521 and the second unlocking groove 522 are disrupted, and the clutch lever 42 is in the second position that allows the clutch ball 41 to exit the clutch groove 23. Figure 6 As shown, when the unlocking knob 20 is rotated, the rotating shaft 22 forces the clutch ball 41 to disengage from the clutch groove 23. The clutch ball 41 and the clutch groove 23 cannot engage, so the power of the unlocking knob 20 cannot be transmitted to the transmission shaft 30. As a result, the unlocking knob 20 rotates freely relative to the transmission shaft 30, while the transmission shaft 30 cannot rotate and cannot drive the lock cylinder 210 to unlock.

[0075] The first key plate 511 rotates with the turntable 53 and drives the second key plate 512 to rotate, so that the first unlocking groove 521 of the first key plate 511 and the second unlocking groove 522 of the second key plate 512 are aligned or misaligned. This makes it easy to unlock and lock the key plate assembly 50. The operation is convenient, the structure is simple, and the structure is more compact.

[0076] In some embodiments, the turntable 53 can be mounted on the rotating shaft 22 via a bearing 60.

[0077] As an example, a bearing hole is formed on the side of the turntable 53 facing the handle 21, and a bearing 60 is mounted on the rotating shaft 22, with the bearing 60 installed in the bearing hole.

[0078] Therefore, the turntable 53 and the unlocking knob 20 can rotate independently, while also making the structure more compact and thus smaller.

[0079] In some embodiments, the plurality of cipher pieces 51 further includes a third cipher piece 513, which is rotatably sleeved on the bushing 532 and is located on the side of the second cipher piece 512 opposite to the first cipher piece 511. The second cipher piece 512 can drive the third cipher piece 513 to rotate so that the third unlocking groove 523 of the third cipher piece 513 and the second unlocking groove 522 of the second cipher piece 512 are aligned or misaligned.

[0080] When unlocking is required, the turntable 53 can be rotated (e.g., clockwise). The first cipher piece 511 rotates with the turntable 53, causing the second cipher piece 512 to rotate. The second cipher piece 512 then causes the third cipher piece 513 to rotate. When the third unlocking groove 523 of the third cipher piece 513 is in place, the turntable 53 can be rotated in the opposite direction (e.g., counterclockwise). The first cipher piece 511 rotates with the turntable 53, causing the second cipher piece 512 to rotate in the opposite direction. When the second unlocking groove 523 of the second cipher piece 512 is in place, the turntable 53 can be rotated in the opposite direction. After 22 is in place, turntable 53 is rotated again (e.g., clockwise). The first key plate 511 rotates with turntable 53. When the first unlocking groove 521 of the first key plate 511 is in place, turntable 53 stops rotating. At this time, the first unlocking groove 521, the second unlocking groove 522, and the third unlocking groove 523 are aligned. The elastic element 43 drives the clutch lever 42 into the first unlocking groove 521, the second unlocking groove 522, and the third unlocking groove 523. The clutch lever 42 is in the first position that prevents the clutch ball 41 from exiting the clutch groove 23. Figure 5 As shown, the power of rotating the unlocking knob 20 is transmitted to the drive shaft 30 through the clutch ball 41, thereby driving the drive shaft 30 to rotate, which in turn drives the lock cylinder 210 to rotate and unlock.

[0081] By rotating the three cipher chips in sequence to align and misalign the three unlocking grooves, the difficulty of being illegally cracked is increased, further enhancing security.

[0082] The above scheme shows the cases where two or three cipher chips are rotated relative to each other to unlock the device. However, it is understandable that the number of cipher chips is unlimited, and four, five, six or more can be set if needed.

[0083] In some embodiments, the first unlocking groove 521 includes a groove bottom surface 521a and two groove side surfaces 521b, wherein at least one groove side surface 521b is an inclined surface; during the process of the password disk assembly 50 switching from the unlocked state to the locked state, the inclined surface pushes the clutch lever 42 to rotate, so that the clutch lever 42 exits the unlocking groove 52, thereby causing the clutch lever 42 to rotate from the second position to the first position.

[0084] As an example, the clutch lever 42 can disengage from the unlocking groove 52 by pressing against the edge of the password piece 51 under the elastic force of the elastic element 43.

[0085] With at least one groove side 521b being an inclined surface, rotating the turntable 53 can easily disengage the clutch lever 42 from the unlocking groove 52, while simultaneously misaligning multiple unlocking grooves 52, making operation convenient and the structure simple.

[0086] In some embodiments, the first cipher chip 511 is provided with a first actuating member 541, the second cipher chip 512 is provided with a second actuating member 542, and the third cipher chip 513 is provided with a third actuating member 543; the first cipher chip 511 actuates the second actuating member 542 through the first actuating member 541 to drive the second cipher chip 512 to rotate; the second cipher chip 512 actuates the third actuating member 543 through the second actuating member 542 to drive the third cipher chip 513 to rotate.

[0087] The first cipher chip 511 rotates with the turntable 53. When the first cipher chip 511 rotates to the point where the first actuating element 541 interferes with the second actuating element 542, the first cipher chip 511 actuates the second actuating element 542 through the first actuating element 541, thereby causing the second cipher chip 512 to rotate. Similarly, when the second cipher chip 512 rotates and the second actuating element 542 interferes with the third actuating element 543, the second cipher chip 512 actuates the third actuating element 543 through the second actuating element 542, thereby causing the third cipher chip 513 to rotate.

[0088] As an example, the second actuating member 542 can pass through the second cipher piece 512, so that the second actuating member 542 extends to both sides in the thickness direction of the second cipher piece 512. The third actuating member 543 can pass through the third cipher piece 513, so that the third actuating member 543 extends to both sides in the thickness direction of the third cipher piece 513. A collar can be respectively provided between the second cipher piece 512 and the first cipher piece 511, and between the second cipher piece 512 and the third cipher piece 513, with the collar fitted onto the bushing 532.

[0089] The first key piece 511 moves the second key piece 542 via the first actuating member 541, thereby causing the second key piece 512 to rotate; the second key piece 512 moves the third key piece 543 via the second actuating member 542, thereby causing the third key piece 513 to rotate. This allows the first unlocking groove 521, the second unlocking groove 522, and the third unlocking groove 523 to be easily aligned and misaligned, thus achieving unlocking and locking. The structure is simple and reliable.

[0090] In some embodiments, the second cipher plate 512 is provided with a plurality of first mounting holes 512a distributed circumferentially thereon. The plurality of first mounting holes 512a are used to selectively mount a second toggle member 542, so that the mounting position of the second toggle member 542 on the second cipher plate 512 is adjustable, thereby allowing the cipher of the cipher disk assembly 50 to be changed. And / or, the third cipher plate 513 is provided with a plurality of second mounting holes 513a distributed circumferentially thereon. The plurality of second mounting holes 513a are used to selectively mount a third toggle member 543, so that the mounting position of the third toggle member 543 on the third cipher plate 513 is adjustable, thereby allowing the cipher of the cipher disk assembly 50 to be changed.

[0091] When the password needs to be changed, the installation position of the third toggle 543 on the third password piece 513 or the installation position of the second toggle 542 on the second password piece 512 can be adjusted to change the password. After the password is changed, the changed password can be confirmed by rotating the turntable 53 to record the turntable scale when multiple password pieces 51 are in position.

[0092] As an example, the mounting bracket 10 can also be provided with a code-changing hole 15, through which the third toggle 543 can be easily installed and removed, thereby quickly changing the unlocking code.

[0093] Therefore, the password disk component 50 has a password change function, and the password change is more convenient and flexible.

[0094] This application embodiment also provides a door lock 200, including a lock cylinder 210 and the door lock password unlocking device 100 mentioned above, with a drive shaft 30 connected to the lock cylinder 210.

[0095] As an example, refer to Figure 7 The door lock 200 may include a front lock 220 and a rear lock 230, with a lock cylinder 210 installed between the front lock 220 and the rear lock 230, and the drive shaft 30 connected to the lock cylinder 210 via a lock plate 211.

[0096] A lock hole cover 240 can also be provided on the outer side of the front lock 220. The lock hole cover 240 can open or cover the unlocking knob 20, so that the unlocking knob 20 can be hidden in the front lock 220, making the appearance more beautiful and reducing the risk of being damaged.

[0097] Below, refer to Figures 1 to 7 A specific example of the embodiment itself will be described below.

[0098] This invention provides a door lock combination unlocking device 100, specifically a door lock knob mechanical combination disc unlocking device, comprising: an unlocking knob 20, a bearing 60, a first round pin 70, a turntable 53, a first combination plate 511, a second combination plate 512, a third combination plate 513, a collar, an elastic element 43 (spring), a second round pin 44, a clutch lever 42, a mounting bracket 10, a mounting screw 80, a limit screw 34, a drive shaft 30, a retaining ring 55, a third actuating element 543, a second actuating element 542, a first actuating element 541, and a clutch ball 41.

[0099] The unlocking knob 20 is used by the user to apply external force to perform the unlocking operation. The unlocking knob 20 is connected to the turntable 53 via a bearing 60, enabling coaxial independent rotation. The rotating shaft 22 of the unlocking knob 20 passes through the central through-hole of the turntable 53 and the through-hole of the mounting bracket 10, and finally enters the first pin hole 14 of the mounting bracket 10 via the first round pin 70. Figure 2The components are assembled by first limiting slot 24 on rotating shaft 22 (as shown). Furthermore, the clutch slot 23 of unlocking knob 20 is used to cooperate with clutch ball 41, allowing unlocking knob 20 to further drive transmission shaft 30 via clutch ball 41 to achieve unlocking operation.

[0100] The turntable 53 is provided with a rotation position 531a, allowing the user to rotate the turntable 53. A bearing 60 is installed in the bearing groove of the turntable 53 to enable independent rotation of the turntable 53. A positioning pin 533 is provided inside the turntable 53. Figure 3 As shown, the first cipher plate 511 is installed in conjunction with the positioning hole on the first cipher plate 511, enabling synchronous rotation of the turntable 53 and the first cipher plate 511. The first cipher plate 511, the second cipher plate 512, and the third cipher plate 513, along with the collar, are sequentially inserted into the bushing 532 of the turntable 53, and finally fixed by the retaining ring 55 into the third limiting groove 534 of the bushing. At the same time, the first cipher plate 511, the second cipher plate 512, and the third cipher plate 513 have mounting holes. The first actuating element 541, the second actuating element 542, and the third actuating element 543 can be transmission screws, which can be installed in different mounting holes to achieve transmission between the first cipher plate 511, the second cipher plate 512, and the third cipher plate 513. The different positions of the first actuating element 541, the second actuating element 542, and the third actuating element 543 on their respective cipher plates will result in different unlocking rotation codes.

[0101] Furthermore, the clutch lever 42 is fixed by the second round pin 44 passing through the second pin hole 13 and its rotation hole 423 of the mounting bracket 10. At the same time, a spring (elastic element 43) needs to be installed in the reset hole of the clutch lever 42 to provide the power required for the clutch lever to flip and unlock.

[0102] Next, the mounting bracket 10 is used to install parts such as the clutch lever 42, clutch ball 41, drive shaft 30, and unlocking knob 20. The drive shaft 30 passes through the mounting bracket 10 and is locked in place by the limiting screw 34 in the limiting hole 12 on the mounting bracket 10, which engages the second limiting slot 33, preventing it from detaching from the mounting bracket 10. The clutch ball 41 is installed in the clutch through hole 32 of the drive shaft 30 and can move within the clutch through hole 32.

[0103] Explanation of the principle of the password disk component 50:

[0104] The user rotates the turntable 53 to rotate the first cipher chip 511. As the first cipher chip 511 rotates, the first actuating element 541 mounted on it rotates accordingly, and through the second actuating element 542 on the second cipher chip 512, it drives the second cipher chip 512 to rotate. Similarly, this drives the subsequent third cipher chip 513 to rotate. Once one layer of cipher chips is in position, the next layer must be rotated in the opposite direction to ensure that the upper layer is not driven. Therefore, during unlocking, the cipher chips can be rotated from the inside out to ensure that the unlocking grooves 52 of the three cipher chips are all in the unlocking position, i.e., aligned. Since the three layers of cipher chips are unlocked by the turntable 53, the different positions of the actuating elements on each cipher chip will result in different unlocking rotation codes.

[0105] Once the unlocking grooves 52 on the multiple key pieces 51 are in place (aligned), the clutch lever 42 will spring into the unlocking groove 52 under the action of the spring (elastic element 43), and as the clutch lever 42 rotates, the limiting end 42a of the clutch lever 42 ( Figure 4 (As shown) Raise it to push the clutch ball 41 into the clutch groove 23, so as to realize the linkage between the unlocking knob 20 and the drive shaft 30. The drive shaft 30 and the lock plate 211 on the lock cylinder 210 can be rotated by rotating the unlocking knob 20.

[0106] After unlocking, the turntable 53 can be rotated to rotate the first password plate 511. The first unlocking groove 521 on the first password plate 511 can drive the clutch lever 42 to lift and reset. Then, rotating the turntable 53 one revolution can complete the password scrambling operation of the password disk assembly 50. At this time, the limiting end 42a of the clutch lever 42 retracts, and the clutch ball 41 is in an active state in the clutch through hole 32 of the transmission shaft 30. Rotating the unlocking knob 20 will force the clutch ball 41 to move outward and into the clearance hole 11 of the mounting bracket 10, and it cannot drive the transmission shaft 30, so it can only rotate freely.

[0107] The password unlocking device 100 can be installed on the front lock 220 of the door lock through the mounting bracket 10. The external lock hole cover 240 can be added for concealment. The password unlocking device 100 is installed externally and then fixed to the mounting bracket 10 by screws on the rear sealing plate side of the front lock 220 through the fixing holes 16.

[0108] When a user needs to change the password, they simply need to loosen four screws on the back of the front lock 220 to remove the password unlocking device 100 from the lock hole cover 240. Then, adjust the position of the third toggle member 543 so that it is fixed in the other second mounting holes 513a on the third password piece 513 to complete the password change. After the change, the user can confirm the unlocking password by rotating the dial 53 to record the scale of the dial 53 when the multiple password pieces are in position. Then, the password unlocking device 100 can be reinstalled in the front lock 220.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 password unlocking device for a door lock, characterized in that, include: Mounting bracket; An unlocking knob is rotatably mounted on the mounting bracket; A drive shaft, rotatably mounted on the mounting bracket, is used to connect the lock cylinder; A clutch assembly is disposed between the unlocking knob and the drive shaft, which allows the unlocking knob to be connected to or disconnected from the drive shaft; The combination disk assembly includes multiple combination plates, which are rotatable relative to each other to switch the combination disk assembly between an unlocked state and a locked state. When the keypad assembly is in the unlocked state, the clutch assembly connects the unlock knob and the drive shaft so that the unlock knob can drive the drive shaft to rotate. When the keypad assembly is in the locked state, the clutch assembly disconnects the unlock knob and the drive shaft, allowing the unlock knob to rotate freely relative to the drive shaft.

2. The door lock password unlocking device according to claim 1, characterized in that, The unlocking knob is provided with a clutch groove; The drive shaft is provided with a clutch through hole, and the position of the clutch through hole corresponds to the position of the clutch groove. The clutch assembly includes a clutch ball and a clutch lever. The clutch ball is movably disposed in the clutch through hole, and the clutch lever is rotatably disposed in the mounting bracket. When the keypad assembly is in the unlocked state, the clutch lever is in the first position preventing the clutch ball from exiting the clutch slot, and the unlocking knob can drive the drive shaft to rotate through the clutch ball; When the keypad assembly is in the locked state, the clutch lever is in a second position that allows the clutch ball to exit the clutch slot, and the unlocking knob can rotate freely relative to the drive shaft.

3. The door lock password unlocking device according to claim 2, characterized in that, The unlocking knob includes a rotating shaft, and the clutch groove is disposed on the outer peripheral surface of the rotating shaft; The drive shaft is provided with a shaft hole, and the drive shaft is sleeved on the rotating shaft through the shaft hole. The outer circumferential surface of the drive shaft is provided with a clutch through hole, and one end of the clutch through hole extends to the hole wall of the shaft hole.

4. The door lock password unlocking device according to claim 3, characterized in that, The rotating shaft and the transmission shaft are coaxially arranged; The mounting bracket is sleeved on the rotating shaft and the transmission shaft. The mounting bracket is provided with a clearance hole that penetrates the outer and inner circumferential surfaces of the mounting bracket. The position of the clearance hole corresponds to the position of the clutch through hole. The clutch lever has a limiting end that blocks the clutch ball, and the clearance hole is used to avoid the limiting end.

5. The door lock password unlocking device according to claim 4, characterized in that, The clutch lever includes a first lever arm and a second lever arm, and the fulcrum of the clutch lever is located at the connection between the first lever arm and the second lever arm; The end of the first lever arm furthest from the second lever arm is the limiting end; The clutch assembly further includes an elastic element disposed between the second lever arm and the mounting bracket, which is used to drive the clutch lever to rotate from the second position to the first position when the keypad assembly is in the unlocked state.

6. The door lock password unlocking device according to claim 5, characterized in that, Each of the password pieces has an unlocking groove on its edge; When the keypad assembly is in the unlocked state, the unlocking grooves of the plurality of keypads are aligned, and the elastic element drives the second lever arm into the plurality of unlocking grooves; When the keypad assembly is in the locked state, the unlocking grooves of at least two of the keypad pieces are misaligned, and the second lever arm disengages from multiple unlocking grooves.

7. The door lock password unlocking device according to claim 6, characterized in that, The unlocking groove includes a bottom surface and two side surfaces, wherein at least one side surface is an inclined surface. During the transition of the keypad assembly from the unlocked state to the locked state, the inclined surface pushes the clutch lever to rotate, causing the second lever arm to disengage from the unlocking groove.

8. The door lock password unlocking device according to claim 6, characterized in that, The cipher chip includes a first cipher chip, a second cipher chip, and a third cipher chip; The first cipher chip is provided with a first toggle element, the second cipher chip is provided with a second toggle element, and the third cipher chip is provided with a third toggle element; The first cipher chip moves the second toggle via the first toggle to rotate the second cipher chip; The second cipher chip moves the third toggle via the second toggle to rotate the third cipher chip.

9. The door lock password unlocking device according to claim 8, characterized in that, The second cipher plate is provided with a plurality of first mounting holes distributed circumferentially thereon. These first mounting holes are used to selectively mount the second actuating member, so that the mounting position of the second actuating member on the second cipher plate is adjustable, thereby allowing the cipher of the cipher disk assembly to be changed; and / or, The third cipher plate is provided with a plurality of second mounting holes distributed circumferentially thereon. The plurality of second mounting holes are used to selectively mount the third actuating member, so that the mounting position of the third actuating member on the third cipher plate is adjustable, thereby allowing the cipher plate assembly to be changed.

10. A door lock, characterized in that, include: Lock cylinder; The door lock password unlocking device as described in any one of claims 1-9, wherein the drive shaft is connected to the lock cylinder.

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