A contactless automatic cowl change toilet cover

Abstract

The application relates to the technical field of bathroom equipment, in particular to a contact-free automatic cover changing toilet lid, which comprises a cover changing assembly, a seat ring and a cover plate, the cover changing assembly comprises a shell, a frequency sensor, a controller, a first clamping plate, a connecting rod, a first motor, a gear, a universal sliding seat, a pulley, a fixed block, a roller shaft, a first electric telescopic rod, a limiting assembly, a baffle, a placing plate and a second clamping plate, the limiting assembly comprises a torsional spring, a first rotating rod and a second rotating rod, the bottom surface of the seat ring is fixedly installed with an arc-shaped rack, the arc-shaped rack is engaged with the gear, the opposite two arc surfaces of the seat ring are fixedly installed with sliding strips, the sliding strips are slidably connected with the sliding grooves arranged on the surface of the pulley, the controller is electrically connected with the frequency sensor, the first motor and the first electric telescopic rod, a new film can be changed, when a roll of film is used up, the device can change a new film without timely film changing by workers, and the convenience of the device is effectively improved.

Description

Technical Field

[0001] This application relates to the field of bathroom equipment technology, and in particular to a contactless automatic toilet seat cover changer. Background Technology

[0002] According to market research data, the global smart toilet seat market continues to expand, with China being one of the largest consumer markets for smart toilet seats. As the global aging population increases and living standards improve, smart toilet seats are becoming increasingly popular among the elderly and consumers who pursue a high-quality lifestyle.

[0003] Most public restrooms now use toilet seats, which are subject to high traffic and are prone to cross-infection of viruses. People usually put tissues on the toilet seat, but they still come into contact with the toilet seat and are more likely to be infected. Some people even step directly on the toilet seat, which is even more unhygienic and increases the risk of viral infection. Therefore, an automatic toilet seat replacement device has been developed.

[0004] There are two types of existing automatic toilet seat covers. One type involves pressing a switch to activate the controller, which causes the two rollers inside the device, which are fitted with protective covers, to rotate and automatically replace the toilet seat cover. The other type uses a sensor. When the sensor detects a person entering the toilet, it sends a signal to the controller inside the device, which then activates the controller and causes the two rollers inside the device, which are fitted with protective covers, to rotate and automatically replace the toilet seat cover.

[0005] However, only one roll of protective cover can be installed in the device. If the roll of protective cover is used up, the staff may not be able to replace it with a new roll in time, which means that people who need to use the toilet later will not be able to use the toilet seat with the protective cover. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this application is to provide a contactless automatic toilet seat cover replacement system, which solves the problem that staff cannot promptly replace a roll of protective covers after it has been used up.

[0007] The above-mentioned objective of this application is achieved through the following technical solution: a contactless automatic toilet seat cover changing device, comprising a cover changing assembly, a seat ring, and a cover plate. The cover changing assembly includes a housing, a frequency sensor fixedly installed inside the housing, and a controller fixedly installed inside the housing. A first retaining plate is placed inside the housing. A first motor is fixedly installed on the top surface of the first retaining plate. The controller is electrically connected to the frequency sensor and the first motor. The output end of the first motor passes through the bottom surface of the first retaining plate and is fixedly connected to a gear. Two universal sliding blocks are fixedly installed on the bottom surface of the first retaining plate. Two pulleys are fixedly installed on the bottom surface of the two universal sliding blocks respectively. The surface of the pulleys is provided with a sliding groove. A fixing block is fixedly installed inside the outer casing. A roller shaft is rotatably connected to one side of the fixing block, and a first electric telescopic rod is fixedly installed thereon. The first electric telescopic rod is electrically connected to a controller. A limit component is fixedly connected to the other end of the roller shaft. The other end of the limit component is rotatably connected to the inner wall of the outer casing. A baffle is fixedly connected to the other end of the first electric telescopic rod. A placement plate is fixedly installed inside the outer casing. A second locking plate is placed on the placement plate and is located directly below the first electric telescopic rod. The second locking plate is directly opposite the baffle. An opening is provided on one side of the baffle. A through hole and a rectangular slot are formed on the surface of the baffle. The outer diameter of the through hole is smaller than the inner diameter of the rectangular slot. An arc-shaped rack is fixedly installed on the bottom surface of the seat ring. The arc-shaped rack meshes with the gear. Sliding strips are fixedly installed on two opposite arc surfaces of the seat ring. The sliding strips are slidably connected to the grooves formed on the surface of the pulley.

[0008] Furthermore, connecting rods are fixedly installed on opposite sides of the second card plate, and a second motor is fixedly installed on the side of the fixed block away from the first electric telescopic rod. The second motor is electrically connected to the controller, and a first sleeve is fixedly connected to the output end of the second motor. A second sleeve is rotatably connected to the side of the outer shell away from the first sleeve. The arc surfaces of the first sleeve and the second sleeve are provided with a plurality of slots, which are arranged in a circular array on the arc surfaces of the first sleeve and the second sleeve.

[0009] Furthermore, a second electric telescopic rod is fixedly installed on the bottom surface inside the housing, and a support plate is fixedly connected to the output end of the second electric telescopic rod. The second electric telescopic rod is electrically connected to the controller.

[0010] Furthermore, a third electric telescopic rod is fixedly installed inside the housing near the seat ring and is located above the first sleeve and the second sleeve. The third electric telescopic rod is electrically connected to the controller. A first collection box is placed on the bottom surface inside the housing. The top surface of the first collection box is set as an opening. The first collection box is located below the first sleeve and the second sleeve.

[0011] Furthermore, the limiting assembly includes a torsion spring, a first rotating rod, and a second rotating rod. One end of the torsion spring is fixedly connected to the first rotating rod, and the other end of the torsion spring is fixedly connected to the second rotating rod. The other end of the first rotating rod is rotatably connected to the inner wall of the outer casing. The other end of the second rotating rod is directly opposite the end of the roller shaft away from the fixed block. A second collecting box is placed on the bottom surface inside the outer casing. The top surface of the second collecting box is set as an opening, and the opening of the second collecting box is directly below the torsion spring.

[0012] Furthermore, a fourth electric telescopic rod is fixedly installed on the top surface inside the housing. The output end of the fourth electric telescopic rod is directly opposite the torsion spring, and the fourth electric telescopic rod is electrically connected to the controller.

[0013] Furthermore, the cover plate is rotatably connected to the outer shell, and an arc-shaped ultraviolet disinfection lamp strip is fixedly installed on the top surface inside the cover plate. The controller is electrically connected to the ultraviolet disinfection lamp strip.

[0014] Furthermore, an ultraviolet disinfection lamp is fixedly installed inside the outer casing, and the ultraviolet disinfection lamp is positioned directly opposite the first sleeve and the second sleeve.

[0015] Furthermore, the outer shell is rotatably connected to the seat ring, and an arc-shaped heating tube is fixedly installed on the inner wall of the seat ring.

[0016] Furthermore, a sensor and a display screen are fixedly installed on the side of the housing near the seat ring. The display screen is electrically connected to the frequency sensor, and the sensor is electrically connected to the controller and the arc-shaped heating tube.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] Workers can pre-load multiple rolls of film onto the roller, then open the openings of these films and insert them into the slots of the second clamping plate. When a roll of film is used up and a new roll needs to be replaced, the frequency of the frequency sensor is set to indicate the number of times a roll of film can be used. Once this number of uses is reached, a new roll of film needs to be replaced. At this time, the frequency sensor transmits a signal to the controller, which controls the extension of the first electric telescopic rod and the start of the first motor. The first motor reverses, driving the gears to rotate, causing the pulley to move along the track of the slide bar to the bottom of the roller. The first electric telescopic rod causes the baffle to abut against the side wall of a roll of film and the side wall of the second clamping plate, pushing the roll of film towards the used roll. The second clamping plate slides on the placement plate, pushing the new roll of film forward. The second plate is pushed directly above the first platen, and then the first motor rotates forward, causing the pulley to move along the track of the slide bar. The controller activates the second electric telescopic rod, causing the support plate to abut against the arc surface of the connecting rods on opposite sides of the second platen. The extension and retraction of the second electric telescopic rod pushes the second platen upward, causing the connecting rods on opposite sides of the second platen to engage with the slots on the arc surfaces of the first and second sleeves, respectively. The second electric telescopic rod is then reset, and the second motor is activated again, causing the first sleeve to rotate and the second platen to rotate, thus shrinking the film and completing the film replacement. This allows for the replacement of a new roll of film even when no staff is available to replace it in time, effectively improving the convenience of the device.

[0019] When a roll of film is used up and a new roll of film needs to be replaced, the frequency sensor transmits a signal to the controller, which then sends a signal to the fourth electric telescopic rod. This causes the fourth electric telescopic rod to activate, extending towards the torsion spring and contacting the curved surface of the used roll of film. This causes the paper tube to press down, which in turn causes the torsion spring to press down, causing the second rotating rod to tilt downwards. As a result, the paper tube slides along the tilt direction of the second rotating rod and falls into the second collection box, effectively improving the practicality of the device.

[0020] After using the device, the seat ring is replaced with a new layer of film. The second clamping plate rotates between the first and second sleeves to collect the film, rolling up the used film. Since the used film is still inside the device, it may breed bacteria. Therefore, the controller sends a signal to the power supply of the ultraviolet disinfection lamp to start the ultraviolet disinfection lamp and disinfect the used film, effectively preventing the growth of bacteria and improving the hygiene of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in the embodiment;

[0022] Figure 2 This is a bottom view in the embodiment;

[0023] Figure 3 This is a schematic diagram of the internal structure of an embodiment;

[0024] Figure 4 yes Figure 3 Sectional view along line AA.

[0025] Reference numerals: 1. Replacement assembly; 11. Housing; 12. Frequency sensor; 13. Controller; 14. First clamping plate; 15. Fixing block; 16. Limiting assembly; 17. Placement plate; 18. Second electric telescopic rod; 19. Third electric telescopic rod; 101. First collection box; 102. Second collection box; 103. Fourth electric telescopic rod; 104. Ultraviolet disinfection lamp; 105. Sensor; 106. Display screen; 141. First motor; 142. Gear; 143. Universal joint. 144. Slide seat; 151. Pulley; 152. Roller shaft; 153. First electric telescopic rod; 154. Baffle; 155. Second motor; 156. First sleeve; 157. Second sleeve; 161. Slot; 162. Torsion spring; 163. First rotating rod; 171. Second rotating rod; 172. Connecting rod; 181. Support plate; 2. Seat ring; 21. Arc-shaped rack; 22. Slide bar; 23. Arc-shaped heating tube; 3. Cover plate; 31. Arc-shaped ultraviolet disinfection lamp strip. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] Example, refer to Figures 1-4A contactless automatic toilet seat cover changing device includes a cover changing assembly 1, a seat ring 2, and a cover plate 3. The cover changing assembly 1 includes a housing 11, a frequency sensor 12 fixedly installed inside the housing 11, and a controller 13 fixedly installed inside the housing 11. A first card plate 14 is placed inside the housing 11. A first motor 141 is fixedly installed on the top surface of the first card plate 14. The controller 13 is electrically connected to the frequency sensor 12 and the first motor 141. The output end of the first motor 141 passes through the bottom surface of the first card plate 14 and is fixedly connected to a gear 142. Two universal slides 143 are fixedly installed on the bottom surface of the first card plate 14. Two pulleys 144 are fixedly installed on the bottom surface of the two universal slides 143 respectively. The surface of the pulleys 144 is provided with a sliding groove. A fixing block 15 is fixedly installed inside the outer casing 11. A roller shaft 151 is rotatably connected to one side of the fixing block 15, and a first electric telescopic rod 152 is fixedly installed thereon. The first electric telescopic rod 152 is electrically connected to the controller 13. A limit component 16 is fixedly connected to the other end of the roller shaft 151. The other end of the limit component 16 is rotatably connected to the inner wall of the outer casing 11. A baffle 153 is fixedly connected to the other end of the first electric telescopic rod 152. A placement plate 17 is fixedly installed inside the outer casing 11. A second clamping plate 171 is placed on the placement plate 17 and is located directly below the first electric telescopic rod 152. The second clamping plate 171 is directly opposite the baffle 153. An opening is provided on one side of the baffle 153. A through hole and a rectangular slot are provided on the surface of the baffle 153. The outer diameter of the through hole is smaller than the inner diameter of the rectangular slot. An arc-shaped rack 21 is fixedly installed on the bottom surface of the seat ring 2. The arc-shaped rack 21 meshes with the gear 142. Slide strips 22 are fixedly installed on the two opposite arc surfaces of the seat ring 2. The slide strips 22 are slidably connected to the slide groove opened on the surface of the pulley 144.

[0028] Reference Figure 3Workers can pre-load multiple rolls of film onto roller 151, then open the openings of these films and insert them into the slots of the second clamping plate 171. When a roll of film is used up and a new roll needs to be replaced, the frequency of the frequency sensor 12 is set. This frequency represents the number of times a roll of film can be used. Once this number of uses is reached, a new roll of film needs to be replaced. At this time, the frequency sensor 12 transmits a signal to the controller 13. The controller 13 controls the extension of the first electric telescopic rod 152 and the start of the first motor 141, causing the first motor 141 to reverse, driving the rotation of the gear 142, and causing the pulley 144 to move along the slide bar. The track of 22 moves to the bottom of the roller 151. The first electric telescopic rod 152 causes the baffle 153 to abut against the side wall of a roll of film and the side wall of the second clamping plate 171, pushing the roll of film towards the used roll of film. The second clamping plate 171 slides on the placement plate 17, pushing the new film directly above the first clamping plate 14. The second clamping plate 171 is pushed to the surface of the first clamping plate 14. Then, through the forward rotation of the first motor 141, the pulley 144 moves along the track of the slide bar 22. This enables the replacement of a roll of film with a new roll even when a roll of film is used up and there is no staff to replace it in time, effectively improving the convenience of the device.

[0029] Reference Figure 3 Connecting rods 172 are fixedly installed on opposite sides of the second card plate 171. A second motor 154 is fixedly installed on the side of the fixing block 15 away from the first electric telescopic rod 152. The second motor 154 is electrically connected to the controller 13. The output end of the second motor 154 is fixedly connected to the first sleeve 155. A second sleeve 156 is rotatably connected inside the outer shell 11 on the side away from the first sleeve 155. The arc surfaces of the first sleeve 155 and the second sleeve 156 are provided with a plurality of slots 157, which are arranged in a circular array on the arc surfaces of the first sleeve 155 and the second sleeve 156. A second electric telescopic rod 18 is fixedly installed on the bottom surface inside the outer shell 11. The output end of the second electric telescopic rod 18 is fixedly connected to the support plate 181. The second electric telescopic rod 18 is electrically connected to the controller 13. When replacing the film, the controller 13 activates the second electric telescopic rod 18, causing the support plate 181 to abut against the arc surfaces of the connecting rods 172 on opposite sides of the second clamping plate 171. The extension and retraction of the second electric telescopic rod 18 then pushes the second clamping plate 171 upward, causing the connecting rods 172 on opposite sides of the second clamping plate 171 to respectively engage in the slots 157 on the arc surfaces of the first sleeve 155 and the second sleeve 156. The second electric telescopic rod 18 is then reset, and the second motor 154 is activated, causing the first sleeve 155 to rotate, which in turn rotates the second clamping plate 171 to shrink the film, effectively improving the convenience of the device.

[0030] Reference Figure 3A third electric telescopic rod 19 is fixedly installed inside the outer casing 11 on one side near the seat ring 2. The third electric telescopic rod 19 is located above the first sleeve 155 and the second sleeve 156. The third electric telescopic rod 19 is electrically connected to the controller 13. A first collection box 101 is placed on the bottom surface inside the outer casing 11. The top surface of the first collection box 101 is set as an opening. The first collection box 101 is located below the first sleeve 155 and the second sleeve 156. When a roll of film is used up and a new roll of film needs to be replaced, the frequency sensor 12 transmits a signal to the controller 13. The controller 13 then sends a signal to activate the third electric telescopic rod 19, causing it to extend between the first sleeve 155 and the second sleeve 156. When the third electric telescopic rod 19 comes into contact with the used roll of film, it is pushed by the third electric telescopic rod 19, causing the connecting rods 172 on both sides of the second clamping plate 171 to come into contact with the grooves 157 on the arc surfaces of the first sleeve 155 and the second sleeve 156, pushing it outward and causing it to fall into the first collection box 101 inside the outer casing 11, effectively improving the practicality of the device.

[0031] Reference Figure 3 as well as Figure 4 The limiting component 16 includes a torsion spring 161, a first rotating rod 162, and a second rotating rod 163. One end of the torsion spring 161 is fixedly connected to the first rotating rod 162, and the other end of the torsion spring 161 is fixedly connected to the second rotating rod 163. The other end of the first rotating rod 162 is rotatably connected to the inner wall of the outer casing 11. The other end of the second rotating rod 163 is directly opposite the end of the roller shaft 151 away from the fixed block 15. A fourth electric telescopic rod 103 is fixedly installed on the top surface inside the outer casing 11. The output end of the fourth electric telescopic rod 103 is directly opposite the torsion spring 161. The fourth electric telescopic rod 103 is electrically connected to the controller 13. A second collection box 102 is placed on the bottom surface inside the outer casing 11. The top surface of the collection box is set as an opening, and the opening of the second collection box 102 is directly below the torsion spring 161. When a roll of film is used up and a new roll of film needs to be replaced, the frequency sensor 12 transmits a signal to the controller 13. The controller 13 then sends a signal to the fourth electric telescopic rod 103, causing the fourth electric telescopic rod 103 to start. The fourth electric telescopic rod 103 extends towards the torsion spring 161 and contacts the arc surface of the used roll of film, causing the paper tube to press down. This causes the torsion spring 161 to press down, causing the second rotating rod to tilt downwards. As a result, the paper tube slides along the tilt direction of the second rotating rod and falls into the second collection box 102, effectively improving the convenience of the device.

[0032] Reference Figure 1 as well as Figure 3The cover plate 3 is rotatably connected to the outer shell 11. An arc-shaped ultraviolet disinfection lamp strip 31 is fixedly installed on the top surface inside the cover plate 3. The controller 13 is electrically connected to the arc-shaped ultraviolet disinfection lamp strip 31. When the cover plate 3 needs to be closed, the controller 13 sends a power supply signal to the arc-shaped ultraviolet disinfection lamp strip 31, activating the arc-shaped ultraviolet disinfection lamp strip 31 to disinfect the surface of the seat ring 2, effectively preventing the growth of bacteria and improving the hygiene of the device.

[0033] Reference Figure 3 An ultraviolet disinfection lamp 104 is fixedly installed inside the outer casing 11, directly facing the first sleeve 155 and the second sleeve 156. After use, the film on the seat ring 2 is replaced. The second clamping plate 171 rotates between the first sleeve 155 and the second sleeve 156 to collect the used film. Since the used film is still inside the device, it may breed bacteria. Therefore, the controller 13 sends a signal to the power supply of the ultraviolet disinfection lamp 104 to start the ultraviolet disinfection lamp 104, which disinfects the used film, effectively preventing bacterial growth and improving the hygiene of the device.

[0034] Reference Figure 1 , Figure 2 as well as Figure 3 An arc-shaped heating tube 23 is fixedly installed on the inner wall of the seat ring 2. A sensor 105 and a display screen 106 are fixedly installed on the side of the outer shell 11 near the seat ring 2. The display screen 106 is electrically connected to the frequency sensor 12, and the sensor 105 is electrically connected to the controller 13 and the arc-shaped heating tube 23. When the device is needed, sensor 105 detects the presence of a user. The user can observe the display screen 106. When a new roll of film is needed inside the device, the display screen 106 will remind the user. If a new roll of film is not needed, sensor 105 sends a signal to controller 13. Controller 13 activates the arc-shaped heating tube 23 to maintain the temperature of seat ring 2, providing a better user experience. After the user finishes using the device, sensor 105 detects the user's departure and sends a signal to controller 13. Controller 13 then sends a signal to the second motor 154 to activate it, causing the second clamping plate 171 to rotate. This retracts the film used on seat ring 2, causing the roll of film on the second rotating rod to rotate and place a new film on seat ring 2, effectively improving the convenience of the device.

[0035] Working principle: Operators can pre-load multiple rolls of film onto roller 151, then open the openings of these films and insert them into the slots of the second clamping plate 171. When a roll of film is used up and a new roll needs to be replaced, the frequency of the frequency sensor 12 is set. This frequency represents the number of times a roll of film can be used. When this number of uses is reached, a new roll of film needs to be replaced. At this time, the frequency sensor 12 transmits a signal to the controller 13. The controller 13 then sends a signal to activate the third electric telescopic rod 19, causing it to extend between the first sleeve 155 and the second sleeve 156. When the third electric telescopic rod 19 comes into contact with the used roll of film, it is subjected to the third electric telescopic... The thrust of rod 19 causes the connecting rods 172 on both sides of the second clamping plate 171 to abut against the grooves 157 on the arc surfaces of the first sleeve 155 and the second sleeve 156, pushing them outward and causing them to fall into the first collection box 101 inside the outer casing 11. The controller 13 sends a signal to the fourth electric telescopic rod 103, causing the fourth electric telescopic rod 103 to start and extend towards the torsion spring 161, abutting against the arc surface of the used roll of film, causing the paper roll to press down, which in turn causes the torsion spring 161 to press down, causing the second rotating rod to tilt downward, causing the paper roll to slide along the tilt direction of the second rotating rod and fall into the second collection box 102. The frequency sensor 12 transmits a signal to the controller 13. The controller 13 controls the extension of the first electric telescopic rod 152 and the start of the first motor 141, causing the first motor 141 to reverse, driving the rotation of the gear 142, so that the pulley 144 moves along the track of the slide bar 22 to below the roller 151. The first electric telescopic rod 152 causes the baffle 153 to abut against the side wall of a roll of film and the side wall of the second clamping plate 171, pushing the roll of film towards the used roll of film, causing the second clamping plate 171 to slide on the placement plate 17, pushing the new film directly above the first clamping plate 14, and pushing the second clamping plate 171 to the surface of the first clamping plate 14. Then, through the forward rotation of the first motor 141, the pulley 144 moves along the track of the slide bar 22, and the controller 13 controls the extension of the first electric telescopic rod 152. 3. Activate the second electric telescopic rod 18, causing the support plate 181 to abut against the arc surfaces of the connecting rods 172 on opposite sides of the second clamping plate 171. Then, through the extension and retraction of the second electric telescopic rod 18, the second clamping plate 171 is pushed upward, causing the connecting rods 172 on opposite sides of the second clamping plate 171 to respectively engage in the slots 157 on the arc surfaces of the first sleeve 155 and the second sleeve 156. Then, reset the second electric telescopic rod 18, and then activate the second motor 154 to rotate the first sleeve 155, causing the second clamping plate 171 to rotate and shrink the film. This allows for the replacement of a new roll of film even when a roll is used up and there is no staff to replace it in time, effectively improving the convenience of the device.

[0036] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A contactless automatic toilet seat cover changer, comprising a cover changer assembly (1), a seat ring (2), and a cover plate (3), characterized in that: The replacement assembly (1) includes a housing (11), a frequency sensor (12) fixedly installed inside the housing (11), and a controller (13) fixedly installed inside the housing (11). A first card plate (14) is placed inside the housing (11). A first motor (141) is fixedly installed on the top surface of the first card plate (14). The controller (13) is electrically connected to the frequency sensor (12) and the first motor (141). The output end of the first motor (141) passes through the bottom surface of the first card plate (14) and is fixedly connected to a gear (142). Two universal slides (143) are fixedly installed on the bottom surface of the first card plate (14). Two pulleys (144) are fixedly installed on the bottom surface of the two universal slides (143). The surface of the pulleys (144) is provided with a sliding groove. A fixing block (15) is fixedly installed inside the outer shell (11). A roller shaft (151) is rotatably connected to one side of the fixing block (15) and a first electric telescopic rod (152) is fixedly installed. The first electric telescopic rod (152) is electrically connected to the controller (13). A limit component (16) is fixedly connected to the other end of the roller shaft (151). The other end of the limit component (16) is rotatably connected to the inner wall of the outer shell (11). A baffle (153) is fixedly connected to the other end of the first electric telescopic rod (152). A placement plate (17) is fixedly installed inside the outer shell (11). A second card plate (171) is placed on the placement plate (17) and is located directly below the first electric telescopic rod (152). The second card plate (171) is directly opposite the baffle (153). An opening is provided on one side of the baffle (153). A through hole and a rectangular slot are provided on the surface of the baffle (153). The outer diameter of the through hole is smaller than the inner diameter of the rectangular slot. An arc-shaped rack (21) is fixedly installed on the bottom surface of the seat ring (2), the arc-shaped rack (21) meshes with the gear (142), and two opposite arc surfaces of the seat ring (2) are fixedly installed with slide bars (22), the slide bars (22) are slidably connected to the groove opened on the surface of the pulley (144).

2. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: Connecting rods (172) are fixedly installed on opposite sides of the second card plate (171). A second motor (154) is fixedly installed on the side of the fixed block (15) away from the first electric telescopic rod (152). The second motor (154) is electrically connected to the controller (13). The output end of the second motor (154) is fixedly connected to the first sleeve (155). A second sleeve (156) is rotatably connected to the side of the outer shell (11) away from the first sleeve (155). The arc surfaces of the first sleeve (155) and the second sleeve (156) are provided with a number of slots (157), which are arranged in a circular array on the arc surfaces of the first sleeve (155) and the second sleeve (156).

3. The contactless automatic toilet seat cover changing device according to claim 2, characterized in that: A second electric telescopic rod (18) is fixedly installed on the bottom surface inside the outer casing (11). The output end of the second electric telescopic rod (18) is fixedly connected to a support plate (181). The second electric telescopic rod (18) is electrically connected to the controller (13).

4. The contactless automatic toilet seat cover changing device according to claim 2, characterized in that: A third electric telescopic rod (19) is fixedly installed inside the outer casing (11) on the side near the seat ring (2), and is located above the first sleeve (155) and the second sleeve (156). The third electric telescopic rod (19) is electrically connected to the controller (13). A first collection box (101) is placed on the bottom surface inside the outer casing (11). The top surface of the first collection box (101) is set as an opening. The first collection box (101) is located below the first sleeve (155) and the second sleeve (156).

5. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: The limiting component (16) includes a torsion spring (161), a first rotating rod (162), and a second rotating rod (163). One end of the torsion spring (161) is fixedly connected to the first rotating rod (162), and the other end of the torsion spring (161) is fixedly connected to the second rotating rod (163). The other end of the first rotating rod (162) is rotatably connected to the inner wall of the outer shell (11). The other end of the second rotating rod (163) is directly opposite the end of the roller shaft (151) away from the fixed block (15). A second collection box (102) is placed on the bottom surface inside the outer shell (11). The top surface of the second collection box (102) is set as an opening, and the opening of the second collection box (102) is directly below the torsion spring (161).

6. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: A fourth electric telescopic rod (103) is fixedly installed on the top surface inside the outer casing (11). The output end of the fourth electric telescopic rod (103) is directly opposite the torsion spring (161). The fourth electric telescopic rod (103) is electrically connected to the controller (13).

7. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: The cover plate (3) is rotatably connected to the outer shell (11). An arc-shaped ultraviolet disinfection lamp (104) is fixedly installed on the top surface inside the cover plate (3). The controller (13) is electrically connected to the ultraviolet disinfection lamp (104).

8. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: An ultraviolet disinfection lamp (104) is fixedly installed inside the outer casing (11), and the ultraviolet disinfection lamp (104) is directly opposite the first sleeve (155) and the second sleeve (156).

9. The contactless automatic toilet seat cover changing device according to claim 1, characterized in that: The outer shell (11) is rotatably connected to the seat ring (2), and an arc-shaped heating tube (23) is fixedly installed on the inner wall of the seat ring (2).

10. A contactless automatic toilet seat cover changing device according to claim 1, characterized in that: A sensor (105) and a display screen (106) are fixedly installed on the side of the housing (11) near the seat ring (2). The display screen (106) is electrically connected to the frequency sensor (12), and the sensor (105) is electrically connected to the controller (13) and the arc-shaped heating tube (23).

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