Smart home door lock

Abstract

The intelligent household door lock comprises a lock body, an operation panel is arranged on the front face of the lock body, a protective cover is movably arranged on the front face of the lock body, a fingerprint cleaning mechanism is arranged in the protective cover, and a spraying mechanism used in cooperation with the fingerprint cleaning mechanism is arranged at the position, close to the upper end, of the lock body; orbital transfer mechanisms are arranged on the two sides of the lock body, and the fingerprint cleaning mechanism is controlled by the orbital transfer mechanisms to wipe the operation panel. The wiping plate can make contact with or leave the operation panel through the rail transfer mechanism, when the protective cover descends, the wiping plate makes contact with the operation panel, fingerprints and stains on the operation panel can be erased, when the protective cover ascends, the wiping plate leaves the operation panel, unnecessary friction of the wiping plate to the operation panel is reduced, and the wiping efficiency is improved. The service life of the wiping plate is prolonged; and a cleaning agent is sprayed to the wiping plate through the spraying mechanism, so that the effect of wiping fingerprints and stains on the operation panel can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, and in particular to a smart home door lock. Background Art

[0002] Smart home door lock is a new type of door lock that combines traditional door locks with modern technology. It has multiple unlocking methods, intelligent management and high security performance. Smart door locks include but are not limited to fingerprint, password, Bluetooth and other unlocking methods. When using a password or fingerprint to unlock a smart home door lock, you need to press your finger on the password button or fingerprint sensing window. The user's fingerprint information will remain on the password button and fingerprint sensing window. If the residual fingerprint is not wiped off in time, it will be easily exploited by criminals to create security risks.

[0003] A Chinese utility model patent, publication number CN222716640U, discloses a smart home door lock panel with a fingerprint cleaning function. The panel comprises a lock body panel and a front panel. The lock body panel is provided with a password area and a fingerprint module on its surface. The fingerprint module is located above the password area. A sliding frame is slidably mounted on the front end of the front panel. Slides are vertically formed on both sides of the front panel. Sliders are fixed to the inner surface of the sliding frame and slide in the grooves. A sponge is fixed to the inner surface of the sliding frame. A lower horizontal block is fixed horizontally to the surface of the front panel below the password area, and an upper horizontal block is fixed horizontally to the upper surface of the front panel. This utility model's technical solution utilizes a sliding frame fixed to the front end of the front panel that can slide up and down, and a sponge is fixed to the inner surface of the sliding frame. After each fingerprint recognition or password verification, the sliding frame slides downward, and the sponge wipes the password area and fingerprint module, preventing fingerprints from being collected and leaving them undetected, thus enhancing security. Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: when the sliding frame moves up and down, the sponge must rub against the password area and the fingerprint module for wiping, which reduces the service life of the sponge. In addition, this technology can only perform dry wiping, which cannot effectively remove fingerprints and stains, and the cleaning effect is low. Summary of the Invention

[0004] The object of the present invention is to provide a smart home door lock to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a smart home door lock, comprising a lock body, an operation panel provided on the front of the lock body, a protective cover movably provided on the front of the lock body, a fingerprint cleaning mechanism provided inside the protective cover, and a spray mechanism provided near the upper end of the lock body for use with the fingerprint cleaning mechanism;

[0006] The fingerprint cleaning mechanism includes a wiping plate for wiping the operation panel and a lifting frame for controlling the lifting of the wiping plate, wherein the wiping plate is located inside the protective cover and the lifting frame is located outside the protective cover;

[0007] A track changing mechanism is provided on both sides of the lock body. The lifting frame is controlled to rise and fall by the track changing mechanism so that the wiping plate contacts or leaves the operation panel. After the wiping plate contacts the operation panel, the protective cover is moved to wipe the operation panel.

[0008] Preferably, the track changing mechanism comprises a fixing plate fixed on both sides of the lifting frame, a through slot penetrating the fixing plate is provided in the middle of the fixing plate, and a sliding member is slidably connected in the through slot;

[0009] The lock body is provided with a low track and a high track arranged side by side on both sides, and the low track is close to one side of the lock body;

[0010] The lower end of the low track is provided with a downward slope, and the low track is connected to the high track through the downward slope;

[0011] The lower end of the high track is provided with a lower triangular block for driving the sliding member to change from the low track to the high track;

[0012] An upper slope is provided at the upper end of the high track, and the high track is connected to the low track via the upper slope;

[0013] An upper triangular block is provided at the upper end of the low track for driving the sliding member to change from the high track to the low track.

[0014] Preferably, the fingerprint cleaning mechanism further comprises two guide posts located on the inner side of the lifting frame, and the lifting frame is slidably connected to the protective cover via the guide posts, the end faces of the guide posts are provided with limit covers, and the limit covers are located inside the protective cover, and the exteriors of the two guide posts are each sleeved with a return spring, and the return spring is located between the inner wall of the protective cover and the limit covers;

[0015] The lower end of the limiting cover is provided with an opening, and the wiping plate is detachably mounted on the lower end opening of the limiting cover.

[0016] Preferably, the sliding member comprises a sliding square shaft, and the sliding square shaft is slidably connected to the through slot, a round block is provided at the lower end of the sliding square shaft, and a ball is movably provided at the lower end of the round block;

[0017] A limit block is provided at the upper end of the sliding square shaft, and magnetic blocks 1 are provided on both sides of the limit block. Magnetic blocks 2 and 3 matching the magnetic block 1 are provided at both ends of the fixed plate. When the magnetic block 1 and the magnetic block 2 are attracted to each other, the sliding part is located on the low track, and the ball bearing is in rolling connection with the low track. When the magnetic block 1 and the magnetic block 3 are attracted to each other, the sliding part is located on the high track, and the ball bearing is in rolling connection with the high track.

[0018] Preferably, the spraying mechanism includes a spraying bin, which is opened or closed by an upper cover, and is provided inside the spraying bin with a spraying pipe and a liquid storage cylinder for providing cleaning agent to the spraying pipe, and a plurality of spraying heads are provided in the radial direction of the spraying pipe, and a spraying port penetrating the spraying bin is provided on the front of the lock body, and the spraying head is located inside the spraying port.

[0019] Preferably, a position sensor for detecting the position of the fingerprint cleaning mechanism is provided on one side of the upper triangular block, and when the fingerprint cleaning mechanism moves to the spray port position, the spray mechanism sprays the cleaning agent on the wiping plate.

[0020] Preferably, slide grooves are provided on both sides of the lock body, and sliders matching the slide grooves are provided on both sides of the protective cover, and the sliders are slidably connected to the slide grooves.

[0021] Preferably, a damping block for increasing the friction force of the slider is provided on one side of the inner portion of the slide groove near the upper end.

[0022] Preferably, a handle for driving the protective cover to rise and fall is provided on the front side of the protective cover.

[0023] Preferably, the wiping plate is composed of an elastic material and a dust-free cotton cloth, and the dust-free cotton cloth is attached to the end surface of the elastic material;

[0024] The wiping plate wipes the operation panel with a dust-free cotton cloth.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can make the wiping plate contact or leave the operating panel through the track changing mechanism. When the protective cover is lowered, the wiping plate contacts the operating panel and can wipe fingerprints and stains on the operating panel. When the protective cover is raised, the wiping plate leaves the operating panel, reducing unnecessary friction between the wiping plate and the operating panel and improving the service life of the wiping plate.

[0027] Spraying the cleaning agent on the wiping plate by the spraying mechanism can improve the wiping effect of fingerprints and stains on the operation panel, and after wiping is completed, the wiping plate leaves the operation panel, and both the wiping plate and the operation panel can quickly dry the water stains. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 3 It is a front view of the present invention;

[0031] Figure 4 is a side sectional view of the present invention;

[0032] Figure 5 This is a schematic structural diagram of the protective cover of the present invention when it is opened;

[0033] Figure 6 A bottom view of the fingerprint cleaning mechanism of the present invention;

[0034] Figure 7 It is an exploded view of part of the structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the lifting frame structure of the present invention;

[0036] Figure 9 It is a schematic diagram of the sliding part structure of the present invention.

[0037] In the figure: 1. Lock body; 11. Operation panel; 12. Slide; 2. Protective cover; 21. Slider; 3. Fingerprint cleaning mechanism; 31. Lifting frame; 32. Guide column; 33. Limit cover; 34. Return spring; 35. Wiping plate; 4. Spraying mechanism; 41. Spraying chamber; 42. Upper cover; 43. Spraying pipe; 44. Liquid storage cylinder; 45. Spraying head; 46. Spraying port; 5. Track changing mechanism; 51. Fixed Fixed plate; 52, through slot; 53, sliding part; 531, sliding square shaft; 532, round block; 533, ball bearing; 534, limit block; 54, low track; 55, high track; 56, lower inclined surface; 57, lower triangular block; 58, upper inclined surface; 59, upper triangular block; 510, magnetic block one; 511, magnetic block two; 512, magnetic block three; 6, position sensor; 7, damping block; 8, handle. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-9 The present invention provides a technical solution: a smart home door lock, comprising a lock body 1, an operation panel 11 being provided on the front of the lock body 1, a protective cover 2 being movably provided on the front of the lock body 1, a handle 8 being provided on the front of the protective cover 2 for driving the protective cover 2 to rise and fall, a fingerprint cleaning mechanism 3 being provided inside the protective cover 2, and track changing mechanisms 5 being provided on both sides of the lock body 1, the fingerprint cleaning mechanism 3 being controlled by the track changing mechanism 5 to wipe the operation panel 11;

[0040] The fingerprint cleaning mechanism 3 includes a lifting frame 31 located outside the protective cover 2, two guide posts 32 are provided on the inner side of the lifting frame 31, and the lifting frame 31 is slidably connected to the protective cover 2 through the guide posts 32, and a limit cover 33 is provided on the end face of the guide post 32, and the limit cover 33 is located inside the protective cover 2. A reset spring 34 is sleeved on the outside of the two guide posts 32, and the reset spring 34 is located between the inner wall of the protective cover 2 and the limit cover 33. A wiping plate 35 for wiping the operation panel 11 is provided inside the limit cover 33, and the wiping plate 35 is detachably installed inside the limit cover 33. The wiping plate 35 is composed of an elastic material and a dust-free cotton cloth, and the dust-free cotton cloth is attached to the end face of the elastic material. The wiping plate 35 wipes the operation panel 11 with the dust-free cotton cloth;

[0041] The wiping plate 35 is controlled to contact or move away from the operation panel 11 by the track changing mechanism 5. After the wiping plate 35 contacts the operation panel 11, the protective cover 2 is moved to wipe the operation panel 11. The track changing mechanism 5 includes a fixed plate 51 fixed on both sides of the lifting frame 31. The middle part of the fixed plate 51 is provided with a through groove 52 running through the fixed plate 51. A sliding member 53 is slidably connected in the through groove 52. A low track 54 and a high track 55 arranged side by side are provided on both sides of the lock body 1. The low track 54 is close to one side of the lock body 1. The lower end of the low track 54 is provided with a lower inclined surface 56, and the low track 54 is connected to the high track 55 through the lower inclined surface 56. The lower end of the high track 55 is provided with a lower triangular block 57 for driving the sliding member 53 from the low track 54 to the high track 55. The upper end of the high track 55 is provided with an upper inclined surface 58, and the high track 55 is connected to the low track 54 through the upper inclined surface 58. The upper end of the low track 54 is provided with an upper triangular block 59 for driving the sliding member 53 from the high track 55 to the low track 54.

[0042] The sliding member 53 includes a sliding square shaft 531, and the sliding square shaft 531 is slidably connected to the through slot 52. A round block 532 is provided at the lower end of the sliding square shaft 531, and a ball 533 is movably provided at the lower end of the round block 532. A limit block 534 is provided at the upper end of the sliding square shaft 531, and a magnetic block 1 510 is provided on both sides of the limit block 534. A magnetic block 2 511 and a magnetic block 3 512 are respectively provided at both ends of the fixed plate 51, which match the magnetic block 1 510. When the magnetic block 1 510 and the magnetic block 2 511 are attracted to each other, the sliding member 53 is located on the low track 54, and the ball 533 is rollingly connected to the low track 54. When the magnetic block 1 510 and the magnetic block 3 512 are attracted to each other, the sliding member 53 is located on the high track 55, and the ball 533 is rollingly connected to the high track 55.

[0043] Slide grooves 12 are provided on both sides of the lock body 1, and sliders 21 matching the slide grooves 12 are provided on both sides of the protective cover 2. The sliders 21 are slidably connected to the slide grooves 12. A damping block 7 is provided near the upper end of the slide groove 12 to increase the friction of the slider 21.

[0044] Among them, in the normal state, the protective cover 2 is located in front of the operation panel 11 to protect the operation panel 11. At this time, the return spring 34 is in a compressed state, and there is a gap between the wiping plate 35 and the operation panel 11. The sliding member 53 is on the high track 55. When the door lock needs to be opened, the handle 8 is pushed upward, and the slider 21 slides in the sliding groove 12 on both sides of the lock body 1 to move the protective cover 2 upward, so that the lifting frame 31 and the fixed plates 51 on both sides move upward with the protective cover 2, so that the sliding member 53 moves upward on the high track 55. At this time, the magnetic block 1 510 on one side of the limit block 534 is attracted to the magnetic block 3 512, so that the sliding member 53 will not leave the high track 55, and the sliding member 53 will roll during the movement of the sliding member 53. The ball 533 and the high track 55 produce rolling friction, making the protective cover 2 move more smoothly. When the ball 533 moves to the uppermost end of the high track 55 and continues to rise, it will move to the low track 54 through the upper inclined surface 58. When the ball 533 just moves to the low track 54 and continues to rise, the round block 532 of the sliding member 53 will come into contact with one side of the upper triangular block 59, and the round block 532 is moved to the low track 54 close to the side of the lock body 1 through the guidance of the upper triangular block 59. At this time, the magnetic block 1 510 on one side of the limit block 534 leaves the magnetic block 3 512, so that the magnetic block 1 510 on the other side of the limit block 534 is attracted to the magnetic block 2 511, thereby realizing the complete conversion of the sliding member 53 from the high track 55 to the low track The return spring 34 rebounds and the lifting frame 31 moves toward the operation panel 11, so that the limit cover 33 and the wiping plate 35 move toward the operation panel 11, so that the wiping plate 35 contacts the operation panel 11. At this time, the slider 21 also moves from the lower end of the slide groove 12 to the upper end. Since the damping block 7 is provided on the inner side of the upper end of the slide groove 12, the friction force of the slider 21 becomes larger. Therefore, after the handle 8 is released, the protective cover 2 will not fall easily. At this time, the lock can be unlocked through the operation panel 11. When the unlocking is completed, the handle 8 is pulled downward, and the ball 533 moves downward on the low track 54. At the same time, the wiping plate 35 wipes the fingerprints and stains on the operation panel 11. When the ball 533 drops to the low track 54, the ball 533 moves downward on the low track 54. At the same time, the wiping plate 35 wipes the fingerprints and stains on the operation panel 11. 4, the wiping of the operation panel 11 is completed, and the ball 533 is moved from the low track 54 to the high track 55 by the lower inclined surface 56. Then, the round block 532 is completely moved to the high track 55 by the guidance of the lower triangular block 57, so that the sliding member 53 is completely moved to the high track 55, so that the magnetic block 1 510 and the magnetic block 2 511 on the limit block 534 are separated, and the magnetic block 1 510 and the magnetic block 3 512 on the other side of the limit block 534 are attracted. After the ball 533 moves from the low track 54 to the high track 55, the lifting frame 31 is away from the operation panel 11, so that the wiping plate 35 leaves the operation panel 11, and the return spring 34 is compressed again. At this time, the slider 21 also moves to the bottom of the slide groove 12;

[0045] The track-changing mechanism 5 can make the wiping plate 35 contact or leave the operation panel 11. When the protective cover 2 is lowered, the wiping plate 35 contacts the operation panel 11, and can wipe fingerprints and stains on the operation panel 11. When the protective cover 2 is raised, the wiping plate 35 leaves the operation panel 11, reducing unnecessary friction of the wiping plate 35 on the operation panel 11 and improving the service life of the wiping plate 35. When the wiping plate 35 needs to be replaced or cleaned, the protective cover 2 is lifted, and then the wiping plate 35 can be removed from the lower end of the protective cover 2. Then, the dust-free cotton cloth on the wiping plate 35 can be cleaned and recycled.

[0046] A spray mechanism 4 is provided near the upper end of the lock body 1 for use with the fingerprint cleaning mechanism 3. The spray mechanism 4 includes a spray chamber 41, which is opened or closed by an upper cover 42. A spray pipe 43 and a liquid storage cylinder 44 for supplying cleaning agent to the spray pipe 43 are provided inside the spray chamber 41. The spray pipe 43 is provided with multiple spray heads 45 in the radial direction. A spray port 46 is provided on the front of the lock body 1 and passes through the spray chamber 41. The spray head 45 is located inside the spray port 46.

[0047] A position sensor 6 for detecting the position of the fingerprint cleaning mechanism 3 is provided on one side of the upper triangular block 59 . When the fingerprint cleaning mechanism 3 moves to the position of the spray port 46 , the spray mechanism 4 sprays the cleaning agent onto the wiping plate 35 .

[0048] Among them, the spraying mechanism 4 sprays the cleaning agent on the wiping plate 35, which can improve the wiping effect of the wiping plate 35 on the operation panel 11. When the protective cover 2 is opened, the fingerprint cleaning mechanism 3 also moves to the upper end near the lock body 1. At this time, the wiping plate 35 is located at the spray port 46 position, and the position sensor 6 sends a signal to enable multiple spray heads 45 to spray the cleaning agent on the wiping plate 35 at the same time. When the handle 8 is pushed down, the wiping plate 35 with the cleaning agent can wipe the operation panel 11 well. After wiping is completed, the wiping plate 35 leaves the operation panel 11 and can quickly dry the water stains.

[0049] The working principle and usage process of the present invention are as follows: Under normal conditions, the protective cover 2 is located in front of the operating panel 11 to protect the operating panel 11. At this time, the return spring 34 is in a compressed state, and there is a gap between the wiping plate 35 and the operating panel 11. The sliding member 53 is on the high track 55. When the door lock needs to be opened, the handle 8 is pushed upward, so that the lifting frame 31 and the fixed plates 51 on both sides move upward with the protective cover 2, so that the sliding member 53 moves upward on the high track 55. At this time, the magnetic block 1 510 and the magnetic block 3 512 on one side of the limit block 534 are attracted to each other, so that the sliding member 53 will not leave the high track 55. During the movement of the sliding member 53, rolling friction occurs between the ball 533 and the high track 55, making the protective cover 2 move more smoothly. When the ball bearing 533 moves to the uppermost end of the high track 55 and continues to rise, it will move to the low track 54 through the upper inclined surface 58. When the ball bearing 533 just moves to the low track 54 and continues to rise, the round block 532 of the sliding member 53 will come into contact with one side of the upper triangular block 59, and the round block 532 is guided by the upper triangular block 59 to move to the low track 54 close to the lock body 1 side. At this time, the magnetic block 1 510 on one side of the limit block 534 leaves the magnetic block 3 512, so that the magnetic block 1 510 on the other side of the limit block 534 is attracted to the magnetic block 2 511, so that the sliding member 53 is completely transferred from the high track 55 to the low track 54, so that the return spring 34 rebounds, so that the lifting frame 31 moves toward the operation panel 11, so that the limit cover 33 and the wiping plate 35 move toward the operating panel 11, so that the wiping plate 35 contacts the operating panel 11. At this time, the slider 21 also moves from the lower end of the slide groove 12 to the upper end. Since the damping block 7 is provided on the inner side of the upper end of the slide groove 12, the friction force of the slider 21 becomes larger. Therefore, after the handle 8 is released, the protective cover 2 will not fall easily. When the protective cover 2 is opened, the wiping plate 35 is located at the spray port 46. The position sensor 6 sends a signal to make multiple spray heads 45 spray cleaning agent on the wiping plate 35 at the same time. At the same time, the lock can be unlocked through the operating panel 11. When the unlocking is completed, the handle 8 is pulled downward, and the ball 533 moves downward on the low track 54. At the same time, the wiping plate 35 with cleaning agent cleans the fingerprints and dirt on the operating panel 11. The wiping of stains can improve the wiping effect of the wiping plate 35 on the operation panel 11. When the ball 533 descends to the lower end of the low track 54, the wiping of the operation panel 11 is completed. The ball 533 is moved from the low track 54 to the high track 55 through the lower inclined surface 56. Then, the round block 532 is completely moved to the high track 55 through the guidance of the lower triangular block 57, so that the sliding member 53 is completely moved to the high track 55, so that the magnetic block 1 510 on the limit block 534 is separated from the magnetic block 2 511, and the magnetic block 1 510 on the other side of the limit block 534 is attracted to the magnetic block 3 512. After the ball 533 moves from the low track 54 to the high track 55, the lifting frame 31 moves away from the operation panel 11, so that the wiping plate 35 leaves the operation panel 11.After the wiping plate 35 leaves the operating panel 11, the water stains can be quickly dried, and the return spring 34 is compressed again. At this time, the slider 21 also moves to the bottom of the slide groove 12, continuing to protect the operating panel 11 and completing the wiping of fingerprints and stains on the operating panel 11.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A smart home door lock, comprising a lock body (1), wherein an operation panel (11) is provided on the front of the lock body (1), characterized in that: The front of the lock body (1) is provided with a protective cover (2) which is movable, a fingerprint cleaning mechanism (3) is provided inside the protective cover (2), and a spraying mechanism (4) used in conjunction with the fingerprint cleaning mechanism (3) is provided near the upper end of the lock body (1); The fingerprint cleaning mechanism (3) comprises a wiping plate (35) for wiping the operation panel (11) and a lifting frame (31) for controlling the lifting of the wiping plate (35), wherein the wiping plate (35) is located inside the protective cover (2), and the lifting frame (31) is located outside the protective cover (2); Track changing mechanisms (5) are provided on both sides of the lock body (1). The lifting frame (31) is controlled to rise and fall by the track changing mechanism (5) so that the wiping plate (35) contacts or leaves the operating panel (11). After the wiping plate (35) contacts the operating panel (11), the protective cover (2) is moved to wipe the operating panel (11).

2. The smart home door lock according to claim 1, characterized in that: The track changing mechanism (5) comprises a fixing plate (51) fixed on both sides of the lifting frame (31), a through slot (52) penetrating the fixing plate (51) is provided in the middle thereof, and a sliding member (53) is slidably connected in the through slot (52); The lock body (1) is provided with a low track (54) and a high track (55) arranged side by side on both sides, and the low track (54) is close to one side of the lock body (1); The lower end of the low track (54) is provided with a lower slope (56), and the low track (54) is connected to the high track (55) through the lower slope (56); The lower end of the high track (55) is provided with a lower triangular block (57) for driving the sliding member (53) to change from the low track (54) to the high track (55); An upper slope (58) is provided at the upper end of the high track (55), and the high track (55) is connected to the low track (54) via the upper slope (58); An upper triangular block (59) is provided at the upper end of the low track (54) for driving the sliding member (53) to change from the high track (55) to the low track (54).

3. The smart home door lock according to claim 1, characterized in that: The fingerprint cleaning mechanism (3) further comprises two guide posts (32) located inside the lifting frame (31), and the lifting frame (31) is slidably connected to the protective cover (2) through the guide posts (32), and the end faces of the guide posts (32) are provided with limit covers (33), and the limit covers (33) are located inside the protective cover (2), and the exteriors of the two guide posts (32) are both sleeved with reset springs (34), and the reset springs (34) are located between the inner wall of the protective cover (2) and the limit covers (33); The lower end of the limiting cover (33) is provided with an opening, and the wiping plate (35) is detachably mounted on the lower end opening of the limiting cover (33).

4. The smart home door lock according to claim 2, characterized in that: The sliding member (53) includes a sliding square shaft (531), and the sliding square shaft (531) is slidably connected to the through groove (52). A round block (532) is provided at the lower end of the sliding square shaft (531), and a ball (533) is movably provided at the lower end of the round block (532). A limit block (534) is provided at the upper end of the sliding square shaft (531), and magnetic blocks (510) are provided on both sides of the limit block (534). Magnetic blocks (511) and (512) that match the magnetic block (510) are provided at both ends of the fixed plate (51). When the magnetic block (510) and the magnetic block (511) are attracted to each other, the sliding member (53) is located on the low track (54), and the ball (533) is connected to the low track (54) in a rolling manner. When the magnetic block (510) and the magnetic block (512) are attracted to each other, the sliding member (53) is located on the high track (55), and the ball (533) is connected to the high track (55) in a rolling manner.

5. The smart home door lock according to claim 2, characterized in that: The spraying mechanism (4) comprises a spraying bin (41), the spraying bin (41) being opened or closed by an upper cover (42), a spraying pipe (43) and a liquid storage cylinder (44) for supplying cleaning agent to the spraying pipe (43) being provided inside the spraying bin (41), a plurality of spraying heads (45) being provided in a radial direction of the spraying pipe (43), a spraying port (46) penetrating the spraying bin (41) being provided on the front face of the lock body (1), and the spraying head (45) being located inside the spraying port (46).

6. The smart home door lock according to claim 5, characterized in that: A position sensor (6) for detecting the position of the fingerprint cleaning mechanism (3) is provided on one side of the upper triangular block (59); when the fingerprint cleaning mechanism (3) moves to the spray port (46) position, the spray mechanism (4) sprays the cleaning agent on the wiping plate (35).

7. The smart home door lock according to claim 1, characterized in that: Slide grooves (12) are provided on both sides of the lock body (1), and sliders (21) matching the slide grooves (12) are provided on both sides of the protective cover (2), and the sliders (21) are slidably connected to the slide grooves (12).

8. The smart home door lock according to claim 7, characterized in that: A damping block (7) for increasing the friction force of the slider (21) is provided on one side of the inner portion of the slide groove (12) near the upper end.

9. The smart home door lock according to claim 1, characterized in that: A handle (8) for driving the protective cover (2) to rise and fall is provided on the front side of the protective cover (2).

10. The smart home door lock according to claim 1, characterized in that: The wiping plate (35) is composed of an elastic material and a dust-free cotton cloth, and the dust-free cotton cloth is attached to the end surface of the elastic material; The wiping plate (35) wipes the operation panel (11) with a dust-free cotton cloth.

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