A smart lock

Abstract

This invention claims protection for a smart lock, the key technical point of which includes a lock cylinder body, a lock tongue and a lock body inside the lock cylinder body, a U-shaped lock beam connected to the lock body with one end rotatably connected to the lock body, a control chip and a motor electrically connected to the control chip inside the lock body, a threaded sleeve connected to the motor, and a threaded rod connected to the threaded sleeve for fixed connection with the lock beam to drive the lock beam to move, a first abutting member fixedly connected to the end of the lock beam facing the threaded rod, and an internal gear connected to the side of the threaded rod facing the lock beam. The lock cylinder structure of this invention is similar to a U-lock. In the locked state, both ends can form fixed points by abutting against the lock body. At this time, if the lock beam is forcibly twisted, both fixed points need to be destroyed at the same time. Since one fixed point is the fulcrum when twisted, the force required at the other fixed point will be significantly increased due to the lever principle, thereby greatly increasing the difficulty of forcibly destroying the lock and having a high safety factor.

Description

Technical Field

[0001] This invention relates to a smart lock. Background Technology

[0002] Smart locks are a common type of lock. Smart locks on the market usually connect the mechanical lock cylinder and the bolt together, which allows for quick opening and closing. However, the mechanical lock cylinder, which is directly fixed to the bolt, has a simple structure with only one fixed point. When the bolt is forcibly moved or the lock cylinder is twisted, the fixed point is prone to breakage due to forced twisting, which can lead to the smart lock being violently damaged and has a low security level. Therefore, a smart lock with a higher security level is needed.

[0003] For the reasons mentioned above, improving the safety factor is precisely the issue addressed in this application. Summary of the Invention

[0004] To address the shortcomings of existing technologies, a smart lock is provided, which has a high level of security.

[0005] To achieve the above objectives, the following technical solution is provided: A smart lock includes a lock head body, a lock tongue and a lock body inside the lock head body, a U-shaped lock beam connected to the lock body with one end rotatably connected to the lock body, a control chip and a motor electrically connected to the control chip inside the lock body, a threaded sleeve connected to the motor, a threaded rod connected to the threaded sleeve for fixed connection with the lock beam to drive the lock beam to move, a first abutting member fixedly connected to the end of the lock beam facing the threaded rod, an internal gear connected to the side of the threaded rod facing the lock beam, when the threaded rod moves away from the threaded sleeve, the first abutting member will insert into the teeth of the internal gear, a rotating member fixedly connected to the end of the lock tongue, the rotating member having a square-shaped connecting groove, and a square-shaped connecting block fixedly connected to the side of the lock beam facing the rotating member for abutting the inner wall of the connecting groove;

[0006] When the connecting block abuts against the inner wall of the connecting groove, rotating the lock beam can move the lock tongue.

[0007] In summary, the above technical solution has the following beneficial effects: The control chip controls the forward or reverse rotation of the motor to open and close the lock. When the lock needs to be unlocked, the end of the lock beam not connected to the threaded rod abuts against the lock body, and the motor is started to rotate forward. The motor drives the threaded sleeve to rotate. Since the position of the threaded sleeve does not move, it will drive the threaded rod to move away from the threaded sleeve, thereby driving the lock beam away from the lock body. When the threaded rod moves to the top of the threaded sleeve, the threaded rod no longer moves but rotates with the threaded sleeve. At this time, the first contacting part on the threaded rod has moved into the internal gear, and the internal gear is driven to rotate by the threaded rod. Therefore, only a small angle of rotation is needed to drive the lock beam to rotate by the internal gear contacting the first contacting part, so that the end of the lock beam not connected to the threaded rod moves away from the lock body. The lock beam drives the connecting block to contact the connecting groove and rotate forward, and the lock tongue moves towards the inside of the lock head body, thereby realizing an automatic unlocking process.

[0008] When the lock needs to be locked, the motor is started and rotated in the reverse direction. The motor drives the threaded sleeve to rotate in the reverse direction. Similarly, only a small angle is needed for the internal gear to contact the first contacting part to rotate and reset the lock beam. This causes the end of the lock beam that is not connected to the threaded rod to approach the lock body. Then, the reverse rotation of the threaded sleeve will drive the threaded rod to move towards the threaded sleeve, so that the end of the lock beam that is not connected to the threaded rod will contact the lock body again. The lock beam drives the connecting block to contact the connecting groove and rotate in the reverse direction. The lock tongue moves towards the outside of the lock head body, thus realizing one automatic locking process.

[0009] The lock cylinder structure of this invention is similar to a U-lock. When locked, both ends can form fixed points by contacting the lock body. If the lock beam is to be forcibly twisted, both fixed points need to be destroyed at the same time. Since one of the fixed points is the fulcrum when twisted, the force required at the other fixed point will be significantly increased due to the lever principle, thereby greatly increasing the difficulty of forcibly breaking the lock and providing a high safety factor. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0011] Figure 2 This is an exploded view of the lock body;

[0012] Figure 3 This is a cross-sectional view of the latch;

[0013] Figure 4 This is a cross-sectional view of the first embodiment of the present invention;

[0014] Figure 5 This is a cross-sectional view of the second embodiment of the present invention;

[0015] Figure 6 This is a cross-sectional view of the third embodiment of the present invention;

[0016] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0017] Reference numerals in the attached diagram: 1. Lock body; 2. Lock beam; 3. Control chip; 4. Motor; 5. Threaded sleeve; 6. Threaded rod; 7. Internal gear; 8. Lock head body;

[0018] 11. Second receiving groove; 12. Third receiving groove; 13. Fifth receiving groove; 14. Seventh receiving groove; 15. Eighth receiving groove; 16. Blocking element; 17. Spring;

[0019] 21. First abutting element; 22. Ninth receiving groove; 23. Connecting block;

[0020] 41. First drive shaft; 42. First drive gear; 43. Third drive gear; 44. Reduction gear; 45. Second drive shaft; 46. Fourth contact element;

[0021] 51. Second transmission gear; 52. Abutting block; 53. Fourth receiving groove; 54. Third transmission shaft; 55. Fourth transmission shaft; 56. Mechanical lock cylinder;

[0022] 541. The fifth objection;

[0023] 551. Receiving cavity; 552. Sixth abutment; 553. Seventh abutment; 554. Annular groove;

[0024] 561. Round-headed ball; 562. Sixth receiving groove; 563. Through groove;

[0025] 61. Elastic element; 62. Receiving ring; 63. First receiving groove;

[0026] 71. Second objection;

[0027] 81. Smart lock body; 82. Lock tongue; 83. Abutment pin; 84. Abutment rod;

[0028] 811. Fingerprint recognition device; 812. Password control device;

[0029] 821. Rotating component; 822. Connecting groove. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0031] Reference Figure 1-4 The first embodiment shown describes a smart lock, which includes a lock head body 8, a lock tongue 82 and a lock body 1 inside the lock head body 8, a lock beam 2 that is U-shaped and rotatably connected to the lock body 1 at one end, a control chip 3 and a motor 4 electrically connected to the control chip 3 inside the lock body 1, a threaded sleeve 5 connected to the motor 4, a threaded rod 6 for fixedly connecting to the lock beam 2 to drive the lock beam 2 to move, a first abutment 21 fixedly connected to the end of the lock beam 2 facing the threaded rod 6, an internal gear 7 connected to the side of the threaded rod 6 facing the lock beam 2, and when the threaded rod 6 moves away from the threaded sleeve 5, the first abutment 21 will insert into the teeth of the internal gear 7, a rotating member 821 fixedly connected to the end of the lock tongue 82, the rotating member 821 having a square-shaped connecting groove 822, and a square-shaped connecting block 23 for abutting the inner wall of the connecting groove 822 fixedly connected to the side of the lock beam 2 facing the rotating member 821.

[0032] When the connecting block 23 abuts against the inner wall of the connecting groove 822, rotating the lock beam 2 can drive the lock tongue 82 to move.

[0033] The control chip 3 controls the forward or reverse rotation of the motor 4 to open and close the lock. When the lock needs to be unlocked, the end of the lock beam 2 that is not connected to the threaded rod 6 abuts against the lock body 1, and the motor 4 is started to rotate forward. The motor 4 drives the threaded sleeve 5 to rotate. Since the position of the threaded sleeve 5 does not move, it will drive the threaded rod 6 to move away from the threaded sleeve 5, thereby driving the lock beam 2 away from the lock body 1. When the threaded rod 6 moves to the top of the threaded sleeve 5, the threaded rod 6 no longer moves but rotates with the threaded sleeve 5. At this time, the first contact member 21 on the threaded rod 6 has moved into the internal gear 7, and the internal gear 7 is driven to rotate by the threaded rod 6. Therefore, it is only necessary to rotate the lock beam 2 by a small angle through the internal gear 7 contacting the first contact member 21, so that the end of the lock beam 2 that is not connected to the threaded rod 6 moves away from the lock body 1. The lock beam 2 drives the connecting block 23 to contact the connecting groove 822 and rotate forward. The lock tongue 82 moves towards the inside of the lock head body 8, thereby realizing an automatic unlocking process.

[0034] When the lock needs to be locked, the motor 4 is started and rotated in the reverse direction. The motor 4 drives the threaded sleeve 5 to rotate in the reverse direction. Similarly, the internal gear 7 only needs to abut against the first abutting part 21 and rotate by a small angle to drive the lock beam 2 to rotate and reset. This causes the end of the lock beam 2 that is not connected to the threaded rod 6 to approach the lock body 1. Then, the reverse rotation of the threaded sleeve 5 will drive the threaded rod 6 to move towards the threaded sleeve 5, so that the end of the lock beam 2 that is not connected to the threaded rod 6 abuts against the lock body 1 again. The lock beam 2 drives the connecting block 23 to abut against the connecting groove 822 and rotate in the reverse direction. The lock tongue 82 moves towards the outside of the lock head body 8, thereby realizing one automatic locking process.

[0035] The lock cylinder structure of the present invention is similar to a U-lock. When locked, both ends can form fixed points by contacting the lock body 1. If the lock beam 2 is to be forcibly twisted, both fixed points need to be destroyed at the same time. Since one of the fixed points is a fulcrum when twisted, the force required at the other fixed point will be significantly increased due to the lever principle, thereby greatly increasing the difficulty of forcibly destroying the lock and having a high safety factor.

[0036] Furthermore, two abutment posts 83 are fixedly connected inside the lock body 8, located above the rotating member. The two abutment posts 83 are respectively located on both sides of the connecting groove 822. The rotating member 821 is rotatably connected to an abutment rod 84 that connects the inside and outside of the connecting groove 822 on the side facing the abutment posts 83.

[0037] When the abutment rod 84 is in a vertical position, the abutment rod 84 abuts against the abutment post 83 and prevents the rotating member 821 from rotating;

[0038] When the abutment rod 84 is abutted by the connecting block 23, the abutment rod 84 rotates and no longer prevents the rotating part 821 from rotating;

[0039] Since the abutment rod 84 connects the inside and outside of the connecting groove 822, it can be abutted by the connecting block 23 or the abutment post 83. The connecting block 23 can be controlled by the locking beam 2 to abut the abutment rod 84. When the abutment rod 84 is not abutted by the connecting block 23, it is in a vertical state. At this time, the length of the abutment rod 84 extending out of the rotating member 821 is relatively long. When the rotating member 821 rotates, it will abut the abutment post 83, thereby preventing the rotating member 821 from rotating. When the abutment rod 84 is abutted by the connecting block 23, it is in an inclined state. At this time, the height of the abutment rod 84 in the vertical direction is reduced. When the rotating member 821 rotates, it will pass under the abutment post 83 and will not abut the abutment post 83, so that the rotating member 821 can rotate.

[0040] Furthermore, the motor 4 is rotatably connected to the first transmission shaft 41, the first transmission shaft 41 is fixedly connected to the first transmission gear 42, and the threaded sleeve 5 is connected to the second transmission gear 51 that meshes with the first transmission gear 42. When the motor 4 starts, the first transmission shaft 41 drives the second transmission gear 51 to rotate through the first transmission gear 42, and then the second transmission gear 51 drives the threaded sleeve 5 to rotate.

[0041] Furthermore, an elastic element 61 is provided at the fixed connection between the threaded rod 6 and the locking beam 2. When the locking beam 2 moves away from the lock body 1, it will gradually compress the elastic element 61. The internal gear 7 is fixedly connected to a second abutting element 71 arranged in the direction of the threaded rod 6. The threaded rod 6 is fixedly connected to a receiving ring 62 arranged in the direction of the internal gear 7. The receiving ring 62 is provided with a first receiving groove 63 for receiving the second abutting element 71. The inner diameter of the receiving ring 62 is larger than the outer diameter of the elastic element 61.

[0042] To prevent the threads of the threaded rod 6 and threaded sleeve 5 from being damaged by the pressure when the locking beam 2 is compressed, an elastic element 61 is set to buffer the movement. In addition, during the automatic unlocking process, the elastic element 61 will be gradually compressed. During the automatic locking, the elastic element 61 will be reset first, so that the locking beam 2 will not move for a short period of time, providing enough time for the locking beam 2 to rotate. This prevents the locking beam 2 from moving too much before it comes into contact with the top surface of the lock body 1, which would cause the locking beam 2 to only come into contact with the side of the lock body 1 and fail to lock properly.

[0043] During the movement of the threaded rod 6, the second abutment 71 is always contained within the first receiving groove 63, together with the receiving ring 62, to prevent the locking beam 2 from tilting or misaligning. When the threaded rod 6 rotates, it will drive the receiving ring 62 to rotate, thereby abutting the second abutment 71 through the side wall of the first receiving groove 63, and then driving the internal gear 7 to rotate. In addition, in order to avoid the receiving ring 62 affecting the compression of the elastic element 61, the inner diameter of the receiving ring 62 needs to be larger than the outer diameter of the elastic element 61.

[0044] Furthermore, the tip circle diameter of the internal gear 7 is larger than the outer diameter of the portion of the lock beam 2 located inside the lock body 1, and the straight length from the tip to the root of the internal gear 7 is longer than the width of the portion with the first contact member 21.

[0045] In this way, the tooth tip of the internal gear 7 can always be in contact with the lock beam 2, thereby maintaining the smooth movement of the lock beam 2. The first contact member 21 can be easily inserted between the teeth without contacting the tooth root, preventing jamming due to excessive friction. When the lock beam 2 moves upward to its limit, the first contact member 21 can be fully inserted between the teeth. At this time, the internal gear 7 can drive the lock beam 2 to rotate, which can prevent the lock beam 2 from continuing to rotate after moving towards the lock body 1.

[0046] Furthermore, the lock body 1 is also provided with a second receiving groove 11. When the lock is locked, the end of the lock beam 2 away from the threaded rod 6 is received in the second receiving groove 11, which can prevent the lock beam 2 from being forcibly twisted open when the lock is locked.

[0047] Furthermore, such as Figure 5 In the second embodiment shown, based on the first embodiment, the first transmission shaft 41 is also fixedly connected to a third transmission gear 43 located away from the first transmission gear 42. The third transmission gear 43 is meshed with a reduction gear 44. The reduction gear 44 is fixedly connected to a second transmission shaft 45. A fourth abutment 46 is fixedly connected to one end of the second transmission shaft 45 away from the reduction gear 44. The lock body 1 is also provided with a third receiving groove 12 for the fourth abutment 46 to rotate and communicate with the second receiving groove 11. A ninth receiving groove 22 is provided at one end of the lock beam 2 away from the threaded rod 6. When the lock is locked, the fourth abutment 46 is received in the ninth receiving groove 22. In this way, the fourth abutment 46 can abut against the inner walls of the third receiving groove 12 and the ninth receiving groove 22 to prevent the lock beam 2 from being forcibly pulled out.

[0048] Furthermore, such as Figure 6-7 In the third embodiment shown, based on the first embodiment, a contact block 52 is fixedly connected to the second transmission gear 51 on the side facing the threaded sleeve 5. The threaded sleeve 5 is provided with a fourth receiving groove 53 for accommodating the contact block 52. A third transmission shaft 54 ​​is fixedly connected to the threaded sleeve 5 on the side facing the second transmission gear 51. A fifth contact member 541 is fixedly connected to the end of the third transmission shaft 54 ​​away from the threaded sleeve 5. A fourth transmission shaft 55 is fixedly connected to the side of the second transmission gear 51 away from the threaded sleeve 5. The fourth transmission shaft 55 is provided with a receiving cavity 551 for accommodating the third transmission shaft 54. A sixth contact member 552 for abutting against the fifth contact member 541 is fixedly connected to the inner wall of the receiving cavity 551. When the fourth transmission shaft 55 moves in a direction away from the third transmission shaft 54... Then, the sixth abutment 552 moves to the same horizontal plane as the fifth abutment 541, and the fourth drive shaft 55 rotates to drive the sixth abutment 552 to rotate. The sixth abutment 552 abuts against the fifth abutment 541, which in turn drives the third drive shaft 54 ​​to rotate. The end of the fourth drive shaft 55 away from the threaded sleeve 5 is fixedly connected to a mechanical lock core 56. The fourth drive shaft 55 is also provided with an annular groove 554. The annular groove 554 is slidably connected to a seventh abutment 553. The seventh abutment 553 extends out of the lock body 1. The lock body 1 is also provided with a fifth receiving groove 13 for the seventh abutment 553 to slide. When the seventh abutment 553 slides in the fifth receiving groove 13, the seventh abutment 553 drives the fourth drive shaft 55 to move by abutting against the inner wall of the annular groove 554.

[0049] When the fourth drive shaft 55 rotates, part of the seventh abutment 553 will slide in the annular groove 554 and always remain in vertical direction abutting against the inner wall of the annular groove 554. The fourth drive shaft 55 can control whether the second drive gear 51 meshes with the first drive gear 42 by moving, and can also control whether the fifth abutment 541 and the sixth abutment 552 abut. When the fourth drive shaft 55 is moved down by moving the seventh abutment 553, the second drive gear 51 does not mesh with the first drive gear 42, and the fifth abutment 541 and the sixth abutment 552 abut. At this time, the unlocking and locking cannot be achieved automatically by the motor 4. It is necessary to insert the key into the mechanical lock cylinder 56 and unlock it, and then control the rotation of the fourth drive shaft 55 by turning the key, thereby realizing manual control of unlocking and locking.

[0050] Furthermore, the mechanical lock cylinder 56 includes a round-headed pin 561. The fourth drive shaft 55 is provided with a sixth receiving groove 562 for matching the key and a through groove 563 for the round-headed pin 561 to pass through. When the round-headed pin 561 passes through the through groove 563 and is in the sixth receiving groove 562, the mechanical lock cylinder 56 can be rotated by turning the key and the fourth drive shaft 55 can be rotated. The lock body 1 is also provided with a seventh receiving groove 14 for accommodating the fourth drive shaft 55 and an eighth receiving groove 15 communicating with the seventh receiving groove 14. The eighth receiving groove 15 is slidably connected to a trapezoidal blocking member 16. The blocking member 16 is fixedly connected to a spring 17 fixedly connected to the inner wall of the eighth receiving groove 15.

[0051] When the fourth drive shaft 55 moves down, the round-headed pin 561 can enter the sixth receiving groove 562. At this time, the key can be inserted to match the mechanical lock cylinder 56 and rotate the fourth drive shaft 55.

[0052] When the fourth drive shaft 55 is accommodated in the seventh receiving groove 14, the blocking member 16 will close the seventh receiving groove 14. When the fourth drive shaft 55 moves down, it will abut against the inclined surface of the blocking member 16, thereby continuously moving the blocking member 16 toward the eighth receiving groove 15 and compressing the spring 17. When the fourth drive shaft 55 is reset, the blocking member 16 will re-close the seventh receiving groove 14 under the action of the spring 17.

[0053] Furthermore, the lock body 8 is also fixedly connected to the smart lock body 81, which is equipped with a fingerprint recognition device 811 and a password control device 812 that are electrically connected to the control chip 3.

[0054] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A smart lock, characterized in that, The lock includes a lock head body (8), which contains a lock tongue (82) and a lock body (1). The lock body (1) is connected to a U-shaped lock beam (2) with one end rotatably connected to the lock body (1). The lock body (1) contains a control chip (3) and a motor (4) electrically connected to the control chip (3). The motor (4) is connected to a threaded sleeve (5). The threaded sleeve (5) is connected to a threaded rod (6) for fixedly connecting to the lock beam (2) to drive the lock beam (2) to move. The lock beam (2) is fixedly connected to a first abutment at the end facing the threaded rod (6). The threaded rod (6) is connected to an internal gear (7) on the side facing the lock beam (2). When the threaded rod (6) moves away from the threaded sleeve (5), the first contacting part (21) will be inserted between the teeth of the internal gear (7). The end of the lock tongue (82) is fixedly connected to a rotating part (821). The rotating part (821) is provided with a square-shaped connecting groove (822). The lock beam (2) is fixedly connected to a square-shaped connecting block (23) on the side facing the rotating part (821) to abut against the inner wall of the connecting groove (822). When the connecting block (23) abuts against the inner wall of the connecting groove (822), rotating the lock beam (2) can drive the lock tongue (82) to move; An elastic element (61) is provided at the fixed connection between the threaded rod (6) and the locking beam (2). The internal gear (7) is fixedly connected to a second abutting element (71) arranged in the direction of the threaded rod (6). The threaded rod (6) is fixedly connected to a receiving ring (62) arranged in the direction of the internal gear (7). The receiving ring (62) is provided with a first receiving groove (63) for receiving the second abutting element (71). The inner diameter of the receiving ring (62) is larger than the outer diameter of the elastic element (61). The tip circle diameter of the internal gear (7) is greater than the outer diameter of the portion of the lock beam (2) located inside the lock body (1), and the straight length from the tip to the root of the internal gear (7) is longer than the width of the first abutting member (21).

2. The smart lock according to claim 1, characterized in that, The lock body (8) is also fixedly connected to two abutting posts (83) located above the rotating part. The two abutting posts (83) are respectively located on both sides of the connecting groove (822). The rotating part (821) is rotatably connected to the abutting rod (84) that connects the inside and outside of the connecting groove (822) on the side facing the abutting posts (83). When the abutment rod (84) is in a vertical position, the abutment rod (84) abuts against the abutment post (83) and prevents the rotating part (821) from rotating; When the abutment rod (84) is abutted by the connecting block (23), the abutment rod (84) rotates and no longer prevents the rotating part (821) from rotating.

3. The smart lock according to claim 1, characterized in that, The lock body (1) is also provided with a second receiving groove (11). When the lock is locked, the end of the lock beam (2) away from the threaded rod (6) is received in the second receiving groove (11).

4. The smart lock according to claim 1, characterized in that, The motor (4) is rotatably connected to a first transmission shaft (41), and the first transmission shaft (41) is fixedly connected to a first transmission gear (42). The threaded sleeve (5) is connected to a second transmission gear (51) that meshes with the first transmission gear (42). When the motor (4) starts, the first transmission shaft (41) drives the second transmission gear (51) to rotate through the first transmission gear (42), and then the second transmission gear (51) drives the threaded sleeve (5) to rotate.

5. A smart lock according to claim 4, characterized in that, The first drive shaft (41) is also fixedly connected to a third drive gear (43) located away from the first drive gear (42). The third drive gear (43) is meshed with a reduction gear (44). The reduction gear (44) is fixedly connected to a second drive shaft (45). The end of the second drive shaft (45) away from the reduction gear (44) is fixedly connected to a fourth abutment (46). The lock body (1) is also provided with a third receiving groove (12) for the fourth abutment (46) to rotate and communicate with the second receiving cavity. The lock beam (2) is provided with a ninth receiving groove (22) at the end away from the threaded rod (6). When the lock is locked, the fourth abutment (46) is received in the ninth receiving groove (22).

6. A smart lock according to claim 4, characterized in that, The second transmission gear (51) is fixedly connected to an abutment block (52) on the side facing the threaded sleeve (5). The threaded sleeve (5) is provided with a fourth receiving groove (53) for accommodating the abutment block (52). The threaded sleeve (5) is fixedly connected to a third transmission shaft (54) on the side facing the second transmission gear (51). A fifth abutment (541) is fixedly connected to the end of the third transmission shaft (54) away from the threaded sleeve (5). The second transmission gear (51) is fixedly connected to a fourth transmission shaft (55) on the side away from the threaded sleeve (5). The fourth transmission shaft (55) is provided with a receiving cavity (551) for accommodating the third transmission shaft (54). A sixth abutment (552) for abutting the fifth abutment (541) is fixedly connected to the inner wall of the receiving cavity (551). When the fourth transmission shaft (55) moves in a direction away from the third transmission shaft (54), the sixth abutment (552)... 2) Move to the same horizontal plane as the fifth abutment (541), rotate the fourth drive shaft (55) to drive the sixth abutment (552) to rotate, and drive the third drive shaft (54) to rotate through the sixth abutment (552) against the fifth abutment (541). The end of the fourth drive shaft (55) away from the threaded sleeve (5) is fixedly connected to a mechanical lock core (56). The fourth drive shaft (55) is also provided with an annular groove (554). The annular groove (554) is slidably connected to a seventh abutment (553). The seventh abutment (553) extends out of the lock body (1). The lock body (1) is also provided with a fifth receiving groove (13) for the seventh abutment (553) to slide. When the seventh abutment (553) slides in the fifth receiving groove (13), the seventh abutment (553) drives the fourth drive shaft (55) to move by abutting the inner wall of the annular groove (554).

7. A smart lock according to claim 6, characterized in that, The mechanical lock cylinder (56) includes a round-headed pin (561). The fourth drive shaft (55) is provided with a sixth receiving groove (562) for matching the key and a through groove (563) for the round-headed pin (561) to pass through. When the round-headed pin (561) passes through the through groove (563) and is in the sixth receiving groove (562), the mechanical lock cylinder (56) can be rotated by turning the key and the fourth drive shaft (55) can be rotated. The lock body (1) is also provided with a seventh receiving groove (14) for accommodating the fourth drive shaft (55) and an eighth receiving groove (15) communicating with the seventh receiving groove (14). The eighth receiving groove (15) is slidably connected to a blocking member (16) with a trapezoidal cross section. The blocking member (16) is fixedly connected to a spring (17) fixedly connected to the inner wall of the eighth receiving groove (15).

8. A smart lock according to claim 1, characterized in that, The lock body (8) is also fixedly connected to the smart lock body (81), which is equipped with a fingerprint recognition device (811) and a password control device (812) that are electrically connected to the control chip (3).

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