An automatic sheet changing device and method for shared rest cabin folding chairs and beds

Abstract

This invention relates to the field of shared rest cabin technology, specifically to an automatic sheet changing device and method for folding chairs and beds in shared rest cabins. The device includes a rest cabin main body and a door rotatably mounted on one side of the main body. Through the setting of the sheet adjustment and rolling assembly, the device can automatically roll up and replace disposable sheets after the user leaves, without any manual intervention. This effectively overcomes the shortcomings of existing shared rest cabins where manual sheet replacement is cumbersome and untimely, ensuring that every user can access clean isolation sheets and avoiding hygiene risks from cross-contact in high-frequency public use scenarios. The assembly relies on a single-power drive of an electric telescopic rod to achieve the tensioning and retraction of several support plates and the opening and closing of clamping plates. The structure is compact and reliable, ensuring stable tension and flatness of the sheet roll during rolling, and quickly loosening the sheet roll and releasing the clamping ends when replacing consumables, reducing the operational difficulty for maintenance personnel.

Description

Technical Field

[0001] This invention relates to the field of shared rest cabin technology, specifically to an automatic sheet changing device and method for folding chairs and beds in shared rest cabins. Background Technology

[0002] Shared rest pods are short-term rest facilities deployed in public areas, widely used in densely populated areas such as transportation hubs, commercial complexes, industrial parks, and office buildings. They primarily provide independent and private temporary rest spaces for business travelers, commuters, and office workers. These facilities rely on enclosed pod structures to isolate external noise and visual interference, adapting to various usage scenarios such as short lunch breaks, resting between flights or trains, overtime breaks, and temporary relaxation, effectively filling the supply gap for dedicated rest spaces in public areas. With the continuous expansion of convenient service scenarios, the deployment of shared rest pods is constantly increasing, and their internal functional configurations are continuously being optimized and upgraded. Beyond basic rest functions, they are gradually expanding to include diverse additional services, gradually becoming an indispensable convenient rest carrier in urban public service facilities.

[0003] Multifunctional folding chair beds are the core functional component of shared rest cabins and the main support structure for users' rest needs. They can flexibly switch between seated and reclining positions to accommodate different rest requirements, such as sitting, semi-reclining relaxation, and lying down for sleep, balancing space utilization and user comfort within the limited cabin space. These folding chair beds are typically equipped with armrests, backrests, and leg rests, which can adjust the support angle and posture according to the user's body shape and resting habits, further enhancing the body fit and comfort during rest. As a core component of shared rest cabins, the adaptability of the folding chair bed directly affects the user experience and is a key research and development direction for the optimization and upgrading of current shared rest cabin products.

[0004] Currently, the folding chair beds in shared rest pods still have significant shortcomings in hygiene and maintenance during actual use. Some products do not have disposable isolation sheets on the surface of the chair beds, leading to direct contact between different users and creating potential hygiene hazards due to cross-contamination. This makes it difficult to guarantee cleanliness and safety in high-frequency public use scenarios. While some locations are equipped with disposable sheets, they are often individually packaged and require manual installation and replacement. This not only makes maintenance cumbersome and labor-intensive but also makes it difficult to ensure that sheets are changed promptly after each user leaves. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic sheet changing device and method for folding chairs and beds in shared rest cabins, in order to solve the problems mentioned in the background art. In public high-frequency use scenarios, some existing folding chair beds in shared rest cabins do not have disposable isolation sheets, and different users directly contact the surface of the chairs and beds, posing a hygiene risk of cross-contact. The disposable sheets provided at some locations need to be laid and changed manually, which is cumbersome to maintain, has high labor costs, and makes it difficult to ensure timely replacement after each use. Overall, the cleanliness and user experience are insufficient.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic sheet changing device for a shared rest cabin folding chair and bed, comprising a rest cabin body, a door rotatably installed on one side of the rest cabin body, and a mounting seat installed inside the rest cabin body. An ambient light and a millimeter-wave radar are installed on the top wall of the rest cabin body. A seat cushion is fixedly installed at the top of the mounting seat, armrests are symmetrically installed on both sides of the seat cushion, an electric backrest is rotatably installed on one side of the seat cushion, and an electric leg rest is rotatably installed on the other side of the seat cushion. A massage pillow is installed at the top of the electric backrest. A ring-shaped rotating seat is fixedly installed on the outside of the mounting seat near the bottom of the electric leg rest. A sheet adjustment and winding assembly for winding up used disposable sheets is provided on the ring-shaped rotating seat. A storage tube for storing unused disposable sheets is fixedly installed on the outside of the massage pillow, and a cleaning assembly is provided on the outside of the storage tube. Seat cushion rollers for pressing and limiting the sheets to the surface of the seat cushion are rotatably installed on both sides of the seat cushion via rotating frames.

[0007] Furthermore, a control compartment is provided inside one side of the main body of the rest cabin, and a luggage compartment is provided inside the other side of the main body of the rest cabin. An electrical control box is installed inside the control compartment. An oxygen generator, an air conditioner, and a music player are fixedly installed on the cabin wall of the main body of the rest cabin near the control compartment. A control panel that is electrically connected to the electrical control box is installed on the outside of the handrail.

[0008] Furthermore, a pillow pressure roller is rotatably mounted on the end of the electric backrest near the massage pillow via a rotating frame, and the pillow pressure roller is located on the side of the disposable sheet away from the electric backrest; an auxiliary roller is rotatably mounted on the end of the massage pillow away from the electric backrest via a rotating frame, and the auxiliary roller is located between the disposable sheet and the electric backrest.

[0009] Furthermore, the bed sheet adjustment and winding assembly includes a turntable and a stepper motor. The turntable is rotatably engaged inside the annular rotating seat, and the stepper motor is fixedly mounted outside the annular rotating seat. A limit gear is fixedly mounted on the output end of the stepper motor, and a toothed ring is fixedly sleeved on the outside of the turntable. The toothed ring meshes with the limit gear.

[0010] Furthermore, a number of support plates are arranged around the outer edge of the turntable, and a limiting groove corresponding to each of the support plates is opened on the turntable. The limiting groove extends radially along the turntable, and a limiting slider is slidably engaged inside each limiting groove. Each limiting slider is fixedly connected to one end of a corresponding support plate.

[0011] Furthermore, a limit rod is provided between several of the support plates. A pull rod is rotatably installed on the side of each support plate near the limit rod. The end of the pull rod away from the support plate is rotatably installed outside the limit rod. An electric telescopic rod is fixedly installed in the middle of the side of the turntable away from the limit rod. The output end of the electric telescopic rod is fixedly connected to one end of the limit rod. When the electric telescopic rod extends, it drives the limit rod away from the turntable, and pulls the support plate inward along the limit groove through the pull rod. When the electric telescopic rod retracts, it drives the limit rod closer to the turntable, and pushes the support plate outward along the limit groove through the pull rod.

[0012] Furthermore, a connecting frame is fixedly connected to the middle of one of the support plates. The connecting frame is located on the side of the support plate away from the limiting rod. Two movable frames are symmetrically and rotatably installed on the end of the connecting frame away from the support plate. An arc-shaped frame is rotatably connected to the end of each movable frame away from the connecting frame. The end of the arc-shaped frame near the support plate is rotatably installed on the outside of the turntable. A clamping plate is fixedly installed on the end of the arc-shaped frame away from the support plate. The two clamping plates are arranged opposite each other to clamp the ends of the disposable bed sheet.

[0013] Furthermore, the cleaning assembly includes a collection box and a brush roller. The collection box is fixed to the outside of the placement cylinder, and the brush roller is rotatably mounted on the outside of the top of the collection box via a bracket. The placement cylinder has a sheet insertion opening on the side near the brush roller, and the collection box has a collection opening on the top of the brush roller.

[0014] Furthermore, a scraper is fixedly installed on one side of the inner wall of the collection port, one side of the scraper is in contact with one side of the brush roller, and a threaded cap is threadedly installed on one end of the placement cylinder.

[0015] The present invention also provides a method for automatically changing the sheets of a shared rest cabin folding chair and bed, comprising the following steps: S1: Upon receiving the bed sheet replacement trigger command, the bed sheet adjustment and winding component starts to operate, pulling the used disposable bed sheet laid on the surface of the seat cushion, electric leg rest, electric backrest and massage pillow towards the bed sheet adjustment and winding component. S2: During the roll-up of used disposable sheets, unused disposable sheets stored in the placement tube are pulled outward by the roll-up traction force, and after being pressed and limited by the auxiliary roller, pillow pressure roller and seat cushion pressure roller in sequence, they are spread out along the surface of the seat cushion, electric leg rest, electric backrest and massage pillow. S3: During the process of unused disposable sheets being pulled out of the storage tube, the cleaning component scrapes the surface of the unused disposable sheets, sweeping the lint attached to the surface of the sheets into the cleaning component for collection. S4: After the entire section of the bed sheet is laid out without using a disposable bed sheet, the bed sheet adjustment and rewinding component stops operating, completing the automatic bed sheet replacement operation for a single time.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the setting of the bed sheet adjustment and rolling component, can automatically complete the rolling and laying of disposable bed sheets after the user leaves, without any manual intervention. This effectively makes up for the shortcomings of existing shared rest cabins where manual bed sheet replacement is cumbersome and untimely, ensuring that every user can access clean isolation bed sheets and avoiding the hygiene risks of cross-contact in high-frequency public use scenarios. The component relies on the single power drive of the electric telescopic rod, and through the transmission linkage of the limit rod and the pull rod, it simultaneously realizes the tensioning and retraction of several support plates and the opening and closing of the clamping plates. There is no need to add multiple sets of drive structures. The overall structure is compact and reliable. It can stably tension the bed sheet roll during the rolling process and ensure the flatness of the roll. It can also quickly loosen the bed sheet roll and release the clamping end when replacing consumables, greatly reducing the operation difficulty for maintenance personnel.

[0017] 2. This invention, through the setting of the cleaning component, can simultaneously complete the surface cleaning of new bed sheets during the automatic bed sheet laying process, eliminating the need for a separate cleaning step and not extending the overall operation time of bed sheet changing. It effectively removes lint and dust adhering to the bed sheets during production, storage, and filling, further improving the cleanliness of disposable bed sheets and enhancing the hygiene protection effect in public use scenarios. In conjunction with the toothed scraper, it can simultaneously scrape off impurities adhering to the surface of the brush roller, allowing lint and impurities to fall into the collection box for centralized storage through the collection port, preventing impurities from being dispersed and falling back. The threaded cap at the end of the placement cylinder facilitates maintenance personnel to quickly change the bed sheet roll, while simultaneously cleaning the accumulated impurities in the box. The operation is simple and quick, comprehensively improving the user's sense of security and the overall service quality of the shared rest cabin. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional perspective view of the three-dimensional structure of the rest cabin body and the luggage compartment of the present invention; Figure 3 This is a three-dimensional structural diagram of the seat cushion and electric leg rest of the present invention; Figure 4 This is a side view of the electric backrest and massage pillow of the present invention. Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a partial cross-sectional three-dimensional structural schematic diagram of the limiting rod and the support plate of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram demonstrating how the movement of the support plate drives the rotation of the arc-shaped frame according to the present invention. Figure 9 This is a three-dimensional structural diagram of the placement tube and collection box of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C.

[0019] The attached diagram lists the components represented by each number as follows: 1. Main body of the rest cabin; 2. Cabin door; 3. Mounting base; 4. Luggage compartment; 5. Control cabin; 6. Electrical control box; 7. Oxygen generator; 8. Air conditioner; 9. Music player; 10. Millimeter-wave radar; 11. Ambient lighting; 12. Seat cushion; 13. Control panel; 14. Electric leg rest; 15. Electric backrest; 16. Massage pillow; 17. Armrest; 18. Seat cushion roller; 19. Pillow roller; 2 0. Placement cylinder; 21. Auxiliary roller; 22. Annular rotating seat; 23. Turntable; 24. Stepper motor; 25. Limiting gear; 26. Gear ring; 27. Electric telescopic rod; 28. Limiting slide groove; 29. ​​Limiting slider; 30. Limiting rod; 31. Support plate; 32. Pull rod; 33. Connecting frame; 34. Arc frame; 35. Movable frame; 36. Clamping plate; 37. Collection box; 38. Threaded cover; 39. Brush roller; 40. Collection port; 41. Scraper plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 - Figure 9An automatic sheet changing device for a shared rest cabin folding chair and bed includes a rest cabin body 1, a door 2 rotatably mounted on one side of the rest cabin body 1, and a mounting base 3 installed inside the rest cabin body 1. An ambient light 11 and a millimeter-wave radar 10 are installed on the top wall of the rest cabin body 1. A seat cushion 12 is fixedly mounted on the top of the mounting base 3. Armrests 17 are symmetrically mounted on both sides of the seat cushion 12. An electric backrest 15 is rotatably mounted on one side of the seat cushion 12, and an electric leg rest 14 is rotatably mounted on the other side of the seat cushion 12. A massage pillow 16 is mounted on the top of the electric backrest 15. A ring-shaped... The rotating seat 22, annular rotating seat 22 is equipped with a sheet adjustment and winding assembly for winding up used disposable sheets; both sides of the seat cushion 12 are rotatably mounted with cushion rollers 18 for pressing and limiting the sheets to the surface of the seat cushion 12 via rotating frames. To eliminate the discomfort caused by the protrusion of the rollers, the cushion rollers 18 have a circular cross-section with rounded edges, and the outer surface of the rollers is covered with a flexible material such as a silicone sleeve. The roller diameter is set to 5-8mm. While ensuring the function of pressing and limiting the disposable sheets, the contact feel of the hard protrusions is weakened, effectively improving the comfort of use. The inner bottom plate of the rest cabin body 1 is close to the electric motor. A shoe rack is provided on one side of the leg rest 14. Several sets of physiological sensors are embedded in the electric leg rest 14 and the electric backrest 15. Massage components are built into both the electric leg rest 14 and the electric backrest 15. Both the physiological sensors and the massage components are electrically connected to the control box 6. The physiological sensors are used to collect real-time physiological data such as the user's heart rate and respiratory rate and feed it back to the control box 6. The massage components are used to receive control commands from the control box 6 to provide a soothing massage to the user's torso and legs. The physiological sensors can be piezoelectric thin-film sensors, photoplethysmography (PPG) sensors, or electrocardiogram (ECG) electrodes. The piezoelectric thin-film sensor collects corresponding physiological signals by sensing vibrations in the human chest cavity. The capacitive pulse wave sensor collects corresponding physiological signals by sensing changes in human blood flow. Each physiological sensor establishes a stable signal transmission connection with the electrical control box 6 and is configured with an appropriate data sampling frequency. The physiological state data such as heart rate and respiratory rate collected by the physiological sensors are transmitted to the electrical control box 6 in real time. The electrical control box 6 analyzes and judges the user's real-time rest state based on the received physiological data, and then sends corresponding control commands to the massage components inside the electric leg rest 14 and electric backrest 15 to adjust the operation mode and intensity of the massage components, so as to realize the linkage and adaptation between the human physiological state and the massage soothing function, effectively improving the adaptability and overall comfort of rest and relaxation.

[0022] A control cabin 5 is located inside one side of the main body 1 of the rest cabin, and a luggage compartment 4 is located inside the other side of the main body 1 of the rest cabin. An electrical control box 6 is installed inside the control cabin 5. An oxygen generator 7, an air conditioner 8, and a music player 9 are fixedly installed on the cabin wall of the main body 1 of the rest cabin near the control cabin 5. A control panel 13 that is electrically connected to the electrical control box 6 is installed on the outside of the handrail 17.

[0023] The end of the electric backrest 15 near the massage pillow 16 is rotatably mounted with a pillow pressure roller 19 via a rotating frame. The pillow pressure roller 19 is located on the side of the disposable sheet away from the electric backrest 15. The end of the massage pillow 16 away from the electric backrest 15 is rotatably mounted with an auxiliary roller 21 via a rotating frame. The auxiliary roller 21 is located between the disposable sheet and the electric backrest 15.

[0024] The bed sheet adjustment and winding assembly includes a turntable 23 and a stepper motor 24. The turntable 23 is rotatably engaged inside the annular rotating seat 22, and the stepper motor 24 is fixedly mounted outside the annular rotating seat 22. A limit gear 25 is fixedly mounted on the output end of the stepper motor 24. A toothed ring 26 is fixedly sleeved on the outside of the turntable 23, and the toothed ring 26 is meshed with the limit gear 25.

[0025] A number of support plates 31 are arranged around the outer edge of the turntable 23. The turntable 23 has limiting grooves 28 that correspond one-to-one with the support plates 31. The limiting grooves 28 extend radially along the turntable 23. Each limiting groove 28 has a limiting slider 29 that is slidably engaged inside it. Each limiting slider 29 is fixedly connected to one end of a corresponding support plate 31. The limiting grooves 28 on the turntable 23 can adopt a T-slot, dovetail groove, or linear guide pair mating section. The corresponding slidingly engaged limiting sliders 29 are made of POM, nylon, or aluminum alloy. The limiting sliders 29 and the ends of the corresponding support plates 31 are fixedly connected by screw locking or quick-release buckles. This mating structure can ensure the guiding stability and assembly convenience of the limiting sliders 29 during the sliding process along the limiting grooves 28, and ensure that the radial tensioning and retraction of the support plates 31 are smooth and reliable.

[0026] Limiting rods 30 are provided between several support plates 31. Each support plate 31 has a pull rod 32 rotatably installed on the side near the limiting rod 30. The end of the pull rod 32 away from the support plate 31 is rotatably installed on the outside of the limiting rod 30. An electric telescopic rod 27 is fixedly installed in the middle of the side of the turntable 23 away from the limiting rod 30. The output end of the electric telescopic rod 27 is fixedly connected to one end of the limiting rod 30. When the electric telescopic rod 27 extends, it drives the limiting rod 30 away from the turntable 23 and pulls the support plate 31 inward along the limiting groove 28 through the pull rod 32. When the electric telescopic rod 27 retracts, it drives the limiting rod 30 closer to the turntable 23 and pushes the support plate 31 outward along the limiting groove 28 through the pull rod 32.

[0027] The electric telescopic rod 27 is fixedly installed at the center of the side of the turntable 23 away from the support plate 31 and rotates synchronously with the turntable 23. The conductive slip ring is coaxially set at the middle of the end of the electric telescopic rod 27 away from the turntable 23. The rotor end of the conductive slip ring is fixedly connected to the corresponding end of the electric telescopic rod 27 and rotates synchronously. The stator end of the conductive slip ring is fixed to the outside of the annular rotating seat 22 by a fixed bracket and remains stationary. The power supply line and signal line on the rotor side of the conductive slip ring are connected to the drive control end of the electric telescopic rod 27. The power supply line and signal line on the stator side of the conductive slip ring are connected to the electrical control box 6 in the control compartment 5. In this way, the power and control signals are stably transmitted when the turntable 23 and the electric telescopic rod 27 rotate synchronously, which completely avoids the problem of the lines getting tangled and broken during rotation, and will not interfere with the telescopic movement and installation position of the electric telescopic rod 27, ensuring the operational stability and reliability of the bed sheet adjustment and winding assembly.

[0028] A connecting frame 33 is fixedly connected to the middle of one of the support plates 31. The connecting frame 33 is located on the side of the support plate 31 away from the limiting rod 30. Two movable frames 35 are symmetrically and rotatably installed on the end of the connecting frame 33 away from the support plate 31. An arc-shaped frame 34 is rotatably connected to the end of each movable frame 35 away from the connecting frame 33. The end of the arc-shaped frame 34 near the support plate 31 is rotatably installed on the outside of the turntable 23. A clamping plate 36 is fixedly installed on the end of the arc-shaped frame 34 away from the support plate 31. The two clamping plates 36 are arranged opposite each other to clamp the ends of the disposable bed sheet. When the support plate 31 opens outward, the connecting frame 33 pushes the movable frame 35 to drive the arc-shaped frame 34 to retract inward, so that the two clamping plates 36 close and clamp. When the support plate 31 retracts inward, the connecting frame 33 pulls the movable frame 35 to drive the arc-shaped frame 34 to unfold outward, so that the two clamping plates 36 open and release.

[0029] Specifically, the turntable 23 has radially extending limiting grooves 28 that correspond one-to-one with several support plates 31. Each limiting groove 28 has a limiting slider 29 that is fixedly connected to the end of the corresponding support plate 31, so that each support plate 31 can only slide back and forth in the radial direction of the turntable 23 under the constraint of the limiting groove 28, and cannot move circumferentially. On this basis, a limiting rod 30 is provided in the middle area of ​​several support plates 31. Each support plate 31 is rotatably connected to a pull rod 32 on the side facing the limiting rod 30, and the other end of each pull rod 32 is rotatably connected to the limiting rod 30, thereby forming a radial linkage structure between the limiting rod 30 and each support plate 31. At the same time, an electric telescopic rod 27 is fixedly installed in the middle of the side of the turntable 23 away from the limiting rod 30. The output end of the electric telescopic rod 27 passes through the center of the turntable 23 and is fixedly connected to one end of the limiting rod 30, thereby forming an active drive for the axial position of the limiting rod 30.

[0030] During operation, when the electric telescopic rod 27 retracts, its output end drives the limiting rod 30 to move closer to the turntable 23. The limiting rod 30 pushes the corresponding support plate 31 outward through each pull rod 32, so that each limiting slider 29 slides synchronously along the limiting slide groove 28 towards the edge of the turntable 23, thereby driving each support plate 31 to open radially outward, so that the old bed sheet roll sleeved on the outside of the support plate 31 is tensioned and fixed. At the same time, the clamping plate 36 clamps the end of the bed sheet in conjunction to carry out the winding operation. Conversely, when the electric telescopic rod 27 extends, its output end pushes the limiting rod 30 to move away from the turntable 23. The limiting rod 30 simultaneously pulls the corresponding support plate 31 inward through each pull rod 32, causing each limiting slider 29 to slide synchronously towards the center of the turntable 23 along the limiting groove 28. This drives each support plate 31 to retract radially inward, loosening the old bed sheet roll so that it can be pulled out and unloaded from the side of the support plate 31. At the same time, the clamping plate 36 opens in conjunction to release the end of the bed sheet. With the above structure, only the extension and retraction of the electric telescopic rod 27 needs to be controlled to achieve synchronous radial tensioning or retraction of all support plates 31. The structure is compact and the linkage is reliable.

[0031] In this embodiment, the user scans the QR code corresponding to the main body 1 of the rest cabin using a mobile terminal, selects the rest duration, and completes the pre-deduction. The control command is then transmitted to the electrical control box 6 inside the control cabin 5. The electrical control box 6 automatically unlocks and opens the cabin door 2. Simultaneously, the ambient light 11 on the top wall of the main body 1 of the rest cabin illuminates, and the oxygen generator 7 and air conditioner 8 start operating synchronously to adjust and optimize the air environment inside the cabin. At this time, the multi-functional folding chair bed above the mounting seat 3 is in a folded seat state. The mounting seat 3 is fixedly installed on the inner bottom wall of the main body 1 of the rest cabin, providing a stable mounting support base for the seat cushion 12 and the annular rotating seat 22 at the end. The user enters the interior of the main body 1 of the rest cabin through the cabin door 2, and personal belongings can be placed in the luggage compartment 4 on the side of the main body 1 of the rest cabin.

[0032] After the user sits on the seat cushion 12, they can issue a posture adjustment command through the control panel 13 on the armrest 17. After receiving the command, the electric control box 6 controls the electric leg rest 14 and the electric backrest 15 to rotate and adjust synchronously, driving the massage pillow 16 to move synchronously, gradually switching the seat mode to a flat bed state to meet the user's lying and resting needs. During the posture adjustment process, the cabin door 2 closes automatically, forming a closed and independent private rest space. During rest, the millimeter-wave radar 10 on the top wall of the rest chamber 1 continuously collects the user's body position data. Based on the detected neck position, it automatically adjusts the massage points of the existing massage pillow 16 to provide precise massage and relaxation for the user's neck. The body position data output by the millimeter-wave radar 10 includes raw distance and angle measurements, human target point cloud data, and real-time contour trajectory data. All types of data are uniformly transmitted to the electrical control box 6 for analysis and processing. The electrical control box 6 uses a preset human contour recognition algorithm to calculate and identify the neck position based on the geometric boundary features of the head and torso in the echo signal. In the cabin space rectangular coordinate system with the millimeter-wave radar 10 installation center as the origin, the neck position is defined as the center coordinate point where the lower end of the head contour and the upper end of the torso contour connect. The massage pillow 16 has multiple longitudinal and transverse partitions arranged inside. Each unit has an independent massage point. The control box 6, based on the identified neck position coordinates, selectively activates the corresponding massage unit to operate, thereby achieving precise adaptation between the massage area and the user's neck position. In practice, after the user lies down and adjusts their resting posture, the millimeter-wave radar 10 continuously collects human body echo data inside the cabin and transmits it to the control box 6 in real time. The control box 6 analyzes the point cloud data to generate a complete human body contour trajectory. By determining the head boundary position through the contour curvature change point, the center coordinates of the neck are calculated. These coordinates are then matched with the preset coordinates of each massage unit zone within the massage pillow 16, and a start control command is sent to the corresponding massage unit to control it to operate according to the set mode. This completes the automatic adaptation and adjustment of the massage point, ensuring the accuracy and comfort of neck massage relaxation.

[0033] Meanwhile, the millimeter-wave radar 10 and the physiological sensors embedded in the electric leg rest 14 and electric backrest 15 collect and transmit human body status data to the control box 6. This data consists of a combination of multiple parameters, including body position, posture, respiratory rate, and heart rate. The control box 6 executes the linkage control based on the comprehensive determination of the user's real-time rest stage according to the human body status data. Specifically, the volume of the music player 9 is adjusted according to the heart rate and respiratory rate, the color and brightness of the ambient light 11 are adjusted according to the body position and rest stage, the oxygen concentration of the oxygen concentrator 7 is adjusted according to the respiratory rate, and the operating temperature and fan speed of the air conditioner 8 are adjusted according to the body position and heart rate. The parameters of each device are adjusted to a collaborative operation mode, rather than responding to control conditions independently. Instead, the control box 6 uniformly switches according to the preset scene mode of soothing relaxation, deep rest, and gradual awakening. After matching the corresponding scene mode based on the human body status data, the control box 6 synchronously adjusts the operating parameters of each device to achieve collaborative linkage and adaptation of multiple devices, thereby comprehensively improving the user's rest experience.

[0034] When the user's rest period ends or the user actively triggers the end command and leaves the rest cabin body 1, the cabin door 2 closes, and the electrical control box 6 issues a bed sheet changing command to the bed sheet adjustment and rewinding assembly. Before the bed sheet changing process begins, the electric telescopic rod 27 is in the retracted state, the limiting rod 30 at the end of the electric telescopic rod 27 is located near the turntable 23, and each pull rod 32 is in the outward-opening state, pushing the limiting slider 29 on the inner side of the corresponding support plate 31 to slide outward along the limiting slide groove 28, so that the several support plates 31 arranged around it are in the outward-opening tensioned state; at the same time, the connecting frame 33 on the side of the support plate 31 is in the outward-extending position with the support plate 31, driving the movable frames 35 on both sides to push the arc frame 34 inward, so that the clamping plates 36 at the ends of the two sets of arc frames 34 are in the closed clamping state, firmly clamping the ends of the disposable bed sheet.

[0035] Subsequently, the stepper motor 24 starts running, driving the limiting gear 25 at the output end to rotate synchronously. Through the meshing transmission between the limiting gear 25 and the gear ring 26, the turntable 23 is driven to rotate at a constant speed inside the annular rotating seat 22. During the rotation of the turntable 23, the support plate 31, which is in an open state, rotates synchronously with the turntable 23. Through the clamping plate 36, the used disposable sheets are pulled and rolled up at a constant speed, gradually rolling up the old sheets laid on the surface of the seat cushion 12, electric leg rest 14, electric backrest 15 and massage pillow 16 to the outside of the support plate 31. During the rolling up of the old sheets, the unused disposable sheets stored inside the placement cylinder 20 are pulled out from the sheet insertion opening on the side of the placement cylinder 20 under the action of traction force.

[0036] The new sheet then passes sequentially over the auxiliary roller 21, the pillow pressure roller 19, and the seat cushion pressure rollers 18 on both sides of the seat cushion 12. Under the pressure and restraint of each roller, it is laid flat on the surface of the massage pillow 16, the electric backrest 15, the seat cushion 12, and the electric leg rest 14. The auxiliary roller 21 guides and tensions the sheet output from the placement cylinder 20. The pillow pressure roller 19 presses and restrains the sheet at the junction of the electric backrest 15 and the massage pillow 16. The seat cushion pressure rollers 18 on both sides press and restrain the sheet at the junctions of the seat cushion 12 and the electric backrest 15, and the seat cushion 12 and the electric leg rest 14, respectively. The multi-point pressure and restraint effectively prevents the sheet from sliding or shifting during roll-up, chair / bed mode switching, or when the user lies down, ensuring that the sheet always remains flat and conforms to the chair / bed surface, greatly improving the stability and reliability of the sheet installation. Once the new sheet has been fully laid out and the old sheet has been rolled up to the corresponding length, the stepper motor 24 stops operating, completing the automatic sheet replacement process for a single use. The entire process requires no manual intervention and the sheets can be replaced automatically after each user leaves, significantly reducing the manual maintenance costs of the shared rest cabins. At the same time, it ensures that every user can use clean disposable sheets, effectively avoiding the hygiene risks of cross-contact.

[0037] When all the disposable bed sheet rolls inside the placement cylinder 20 are used up, or when the old bed sheet rolls have reached their capacity limit and need to be cleaned up, maintenance personnel can open the hatch 2 to replace the consumables. Maintenance personnel issue a consumable replacement command via control panel 13. Control box 6 extends the electric telescopic rod 27 outwards, pushing the limit rod 30 away from the turntable 23. During this movement, the limit rod 30 drives the pull rods 32 to rotate synchronously, pulling the limit slider 29 on the inner side of the corresponding support plate 31 along the limit groove 28 inwards. This causes the surrounding support plates 31 to retract inwards simultaneously, loosening the old bed sheet roll that was originally taut on the outside of the support plates 31. Simultaneously, as the support plates 31 retract inwards, the connecting frame 33 moves inwards synchronously. The two movable frames 35 at the ends of the connecting frame 33 rotate synchronously with the movement of the connecting frame 33, pulling the two arc-shaped frames 34 outwards. This causes the clamping plates 36 at the ends of the two sets of arc-shaped frames 34 to open outwards synchronously, releasing the clamp on the end of the bed sheet. At this point, maintenance personnel can easily pull the rolled-up old bed sheet from the side of the support plate 31, completing the old bed sheet recycling and cleaning.

[0038] The maintenance personnel then unscrewed the threaded cap 38 at the end of the placement cylinder 20, placed the new disposable bed sheet roll inside the placement cylinder 20, and passed the end of the new bed sheet through the bed sheet insertion opening on the side of the placement cylinder 20. After passing through the auxiliary roller 21, the pillow pressure roller 19, and the two side cushion pressure rollers 18 in sequence, the end of the bed sheet was placed between the two sets of clamping plates 36. After placement, the electric telescopic rod 27 was retracted inward, and the limit rod 30 was pulled to move closer to the turntable 23. The pull rod 32 pushed each support plate 31 to open outward simultaneously, while the connecting frame 33 extended outward, driving the movable frame 35 to push the arc frame 34 inward, so that the clamping plate 36 re-clamped the end of the bed sheet, and the support plate 31 simultaneously tightened and fixed the bed sheet roll. Finally, the threaded cap 38 was screwed back into place, and the entire consumable replacement operation was completed. This structure, driven by a single electric telescopic rod 27, simultaneously achieves the tensioning and retraction of the support plate 31 and the opening and closing of the clamping plate 36. It eliminates the need for multiple additional drive structures, resulting in a compact and reliable overall structure. Maintenance personnel can quickly complete the recycling of old bed sheets and the filling of new bed sheets, significantly shortening the operation time for replacing consumables and effectively improving the maintenance efficiency of shared rest cabins.

[0039] Example 2: Please refer to Figure 9 - Figure 10 This embodiment further illustrates Example 1. The massage pillow 16 is fixed with a storage tube 20 for storing unused disposable sheets, and a cleaning component is provided on the outside of the storage tube 20.

[0040] The cleaning assembly includes a collection box 37 and a brush roller 39. The collection box 37 is fixed to the outside of the placement cylinder 20. The brush roller 39 is rotatably mounted on the top of the collection box 37 via a bracket. A sheet insertion opening is provided on the side of the placement cylinder 20 near the brush roller 39. A collection opening 40 is provided on the top of the collection box 37 near the brush roller 39. During manufacturing, a detachable mandrel and a damping structure can be added inside the placement cylinder 20 to ensure that the sheet roll is rolled up smoothly and at a uniform speed.

[0041] A scraper plate 41 is fixedly installed on one side of the inner wall of the collection port 40. One side of the scraper plate 41 is in contact with one side of the brush roller 39. A threaded cap 38 is threadedly installed on one end of the placement cylinder 20.

[0042] In this embodiment, during the entire process of the disposable bed sheet being pulled out of the placement tube 20 and laid out, the cleaning component simultaneously cleans the surface of the bed sheet. The specific working principle is as follows: the unused disposable bed sheet roll is stored inside the placement tube 20, and the end of the bed sheet is led out through the bed sheet through the bed sheet through the side wall of the placement tube 20. The upper surface of the bed sheet after being led out is directly and tightly attached to the outer peripheral surface of the brush roller 39 at the top of the collection box 37. When the sheet adjustment and winding assembly pulls the sheet outward at a uniform speed, the friction between the sheet and the brush roller 39 causes the brush roller 39 to rotate synchronously and passively around its own support. During the rotation, the fine bristles on the surface of the brush roller 39 continuously sweep across the corresponding surface of the sheet, removing lint, dust, and fine fibers that have adhered to the sheet during production, processing, storage, transportation, and manual filling. This achieves surface pretreatment before the sheet is laid. To avoid slippage and stoppage of the brush roller 39 due to fluctuations in sheet traction force, resulting in unstable cleaning performance, a micro-drive motor can be fixedly installed on the support on the corresponding side of the brush roller 39. The output shaft of the micro-drive motor is coaxially and fixedly connected to the roller shaft of the brush roller 39. When the sheet changing operation starts, the micro-drive motor and the sheet adjustment and winding assembly start synchronously, actively driving the brush roller 39 to rotate at a constant speed. This ensures that the bristles can sweep across the sheet surface evenly and continuously, unaffected by changes in sheet tension or surface friction coefficient, guaranteeing a stable and reliable cleaning effect for lint and dust, and further improving the fault tolerance and operational stability of the cleaning process.

[0043] As the brush roller 39 continues to rotate, the toothed scraper 41 fixed to the inner wall of the collection port 40 always keeps its tooth surface in close contact with the root area of ​​the brush bristles of the brush roller 39. As the brush roller 39 rotates circumferentially, the toothed edges of the scraper 41 comb through the gaps in the brush bristles one by one, thoroughly scraping off the lint and dust embedded inside the bristles. The scraped-off impurities fall into the internal cavity of the collection box 37 through the collection port 40 directly opposite the top of the collection box 37 and are stored in a concentrated manner, effectively preventing the swept-off lint from drifting back onto the bed sheet surface and ensuring the stability of the bed sheet cleaning effect.

[0044] When the sheet roll in the placement cylinder 20 is used up, maintenance personnel can unscrew the threaded cap 38 at the end of the placement cylinder 20 to replace it with a new sheet roll. At the same time, they can directly empty and clean the accumulated impurities inside the collection box 37, making the operation simple and quick. Combined with the fully automatic replacement function of disposable sheets, this cleaning structure can enhance hygiene protection capabilities from two dimensions: sheet body isolation and surface deep cleaning. This further reduces the risk of contact hygiene in high-frequency public use scenarios, effectively improving the safety and overall service quality of the shared rest cabin.

[0045] The present invention also provides a method for automatically changing the sheets of a shared rest cabin folding chair and bed, comprising the following steps: S1: After receiving the bed sheet replacement trigger command, the bed sheet adjustment and winding component starts to operate, pulling the used disposable bed sheet laid on the surface of the seat cushion 12, electric leg support 14, electric backrest 15 and massage pillow 16 to the side of the bed sheet adjustment and winding component. S2: During the roll-up of used disposable sheets, unused disposable sheets stored in the placement tube 20 are pulled outward by the roll-up traction force, and after being pressed and limited by the auxiliary roller 21, pillow pressure roller 19 and seat cushion pressure roller 18 in sequence, they are spread out along the surface of the seat cushion 12, electric leg support 14, electric backrest 15 and massage pillow 16. S3: During the process of unused disposable sheets being pulled out of the storage tube 20, the cleaning component scrapes the surface of the unused disposable sheets, sweeping the lint attached to the surface of the sheets into the cleaning component for collection. S4: After the entire section of the bed sheet is laid out without using a disposable bed sheet, the bed sheet adjustment and rewinding component stops operating, completing the automatic bed sheet replacement operation for a single time.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic sheet changing device for a shared rest cabin folding chair and bed, comprising a rest cabin body, a door rotatably installed on one side of the rest cabin body, and a mounting base installed inside the rest cabin body, characterized in that: The main body of the rest cabin is equipped with ambient lighting and millimeter-wave radar on its top wall; A seat cushion is fixedly installed at the top of the mounting base. Armrests are symmetrically installed on both sides of the seat cushion. An electric backrest is rotatably installed on one side of the seat cushion. An electric leg rest is rotatably installed on the other side of the seat cushion. A massage pillow is installed at the top of the electric backrest. An annular rotating seat is fixedly installed on the outside of the mounting base near the bottom end of the electric leg support. The annular rotating seat is provided with a bed sheet adjustment and winding component for winding up the used disposable bed sheet. The massage pillow has a storage tube fixed to its exterior for storing unused disposable sheets, and the storage tube is equipped with a cleaning component on its exterior. Both sides of the cushion are rotatably mounted with cushion rollers for pressing and confining the bed sheet to the surface of the cushion via a rotating frame.

2. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 1, characterized in that: A control cabin is located inside one side of the main body of the rest cabin, and a luggage compartment is located inside the other side of the main body of the rest cabin. An electrical control box is installed inside the control cabin, and an oxygen generator, an air conditioner, and a music player are fixedly installed on the cabin wall of the main body of the rest cabin near the control cabin. A control panel electrically connected to the electrical control box is installed on the outside of the handrail.

3. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 1, characterized in that: The electric backrest has a pillow pressure roller rotatably mounted on one end near the massage pillow via a rotating frame. The pillow pressure roller is located on the side of the disposable bed sheet away from the electric backrest. An auxiliary roller is rotatably mounted on the end of the massage pillow away from the electric backrest via a rotating frame. The auxiliary roller is located between the disposable bed sheet and the electric backrest.

4. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 1, characterized in that: The bed sheet adjustment and winding assembly includes a turntable and a stepper motor. The turntable is rotatably engaged inside the annular rotating seat, and the stepper motor is fixedly mounted outside the annular rotating seat. A limit gear is fixedly mounted on the output end of the stepper motor, and a toothed ring is fixedly sleeved on the outside of the turntable. The toothed ring meshes with the limit gear.

5. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 4, characterized in that: A plurality of support plates are arranged around the outer edge of the turntable. The turntable has limiting grooves that correspond one-to-one with the support plates. The limiting grooves extend radially along the turntable. A limiting slider is slidably engaged inside each limiting groove. Each limiting slider is fixedly connected to one end of a corresponding support plate.

6. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 5, characterized in that: Limiting rods are provided between several of the support plates. A pull rod is rotatably installed on the side of each support plate near the limiting rod. The end of the pull rod away from the support plate is rotatably installed outside the limiting rod. An electric telescopic rod is fixedly installed in the middle of the side of the turntable away from the limiting rod. The output end of the electric telescopic rod is fixedly connected to one end of the limiting rod. When the electric telescopic rod extends, it drives the limiting rod away from the turntable, and pulls the support plate inward along the limiting groove via the pull rod; when the electric telescopic rod retracts, it drives the limiting rod closer to the turntable, and pushes the support plate outward along the limiting groove via the pull rod.

7. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 6, characterized in that: A connecting frame is fixedly connected to the middle of one of the support plates. The connecting frame is located on the side of the support plate away from the limiting rod. Two movable frames are symmetrically and rotatably installed on the end of the connecting frame away from the support plate. An arc-shaped frame is rotatably connected to the end of each movable frame away from the connecting frame. The end of the arc-shaped frame near the support plate is rotatably installed on the outside of the turntable. A clamping plate is fixedly installed on the end of the arc-shaped frame away from the support plate. The two clamping plates are arranged opposite each other to clamp the ends of the disposable bed sheet.

8. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 1, characterized in that: The cleaning assembly includes a collection box and a brush roller. The collection box is fixed to the outside of the placement cylinder. The brush roller is rotatably mounted on the outside of the top of the collection box via a bracket. A sheet insertion opening is provided through the side of the placement cylinder near the brush roller. A collection port is provided through the top of the collection box near the brush roller.

9. The automatic sheet changing device for a shared rest cabin folding chair and bed according to claim 8, characterized in that: A scraper is fixedly installed on one side of the inner wall of the collection port, and one side of the scraper is in contact with one side of the brush roller. A threaded cap is threadedly installed on one end of the placement cylinder.

10. A method for automatically changing the sheets of a shared rest cabin folding chair and bed, and an automatic sheet changing device for a shared rest cabin folding chair and bed according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Upon receiving the bed sheet replacement trigger command, the bed sheet adjustment and winding component starts to operate, pulling the used disposable bed sheet laid on the surface of the seat cushion, electric leg rest, electric backrest and massage pillow towards the bed sheet adjustment and winding component. S2: During the roll-up of used disposable sheets, unused disposable sheets stored in the placement tube are pulled outward by the roll-up traction force, and after being pressed and limited by the auxiliary roller, pillow pressure roller and seat cushion pressure roller in sequence, they are spread out along the surface of the seat cushion, electric leg rest, electric backrest and massage pillow. S3: During the process of unused disposable sheets being pulled out of the storage tube, the cleaning component scrapes the surface of the unused disposable sheets, sweeping the lint attached to the surface of the sheets into the cleaning component for collection. S4: After the entire section of the bed sheet is laid out without using a disposable bed sheet, the bed sheet adjustment and rewinding component stops operating, completing the automatic bed sheet replacement operation for a single time.

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