Sickbed capable of automatically replacing isolation bed sheet and method

Abstract

The invention belongs to the technical field of medical apparatus and instruments, and discloses a sickbed capable of automatically replacing an isolation bed sheet, the sickbed comprises a support frame, the top ends of the two sides of the support frame are fixedly connected with a fixing frame, the top end of the fixing frame is fixedly connected with a headboard, the fixing frame is internally provided with a transmission mechanism, and the transmission mechanism is used for automatically replacing the bed sheet. A supporting plate is fixedly connected to the side wall of the inner side of the fixing frame, a bed plate is fixedly connected to the outer end of the supporting plate, a certain gap is formed between the bed plate and the supporting frame, the transmission mechanism comprises a guide rail, a first fixing plate, a second fixing plate, a rolling wheel and two sets of guide rollers, and the guide rail is connected with the fixing frame through a first connecting plate. The bed sheet is automatically replaced through the transmission mechanism and the clamping mechanism, it can be guaranteed that when a patient checks in, the contacted bed sheet is clean and not polluted by accompanying personnel, the situation that the bed sheet of the patient is polluted by the accompanying personnel is avoided, and the sleeping environment of the patient is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a hospital bed and a method for automatically replacing an isolation bed sheet. Background Art

[0002] In hospitals and nursing institutions, cleaning and replacing bed sheets is an important part of daily nursing work. The traditional manual process of changing bed sheets is cumbersome and time-consuming, especially when dealing with infectious diseases or critical care. Frequent bed sheet changes will not only increase the workload of nursing staff, but also increase the risk of cross-infection. At the same time, especially in multi-person wards, it is often the case that when patients temporarily leave the bed, the accompanying person sits or lies on the bed, which can easily lead to the contamination of the bed, thereby affecting the patient's treatment and posing a safety hazard to the patient.

[0003] The existing traditional bed sheet replacement relies on manual operation by nursing staff, and requires frequent replacement when the bed is contaminated, which not only increases the workload, but also consumes a lot of time and energy for nursing staff with high workloads. In addition, most of the existing beds with automatic replacement of isolation sheets need to be purchased separately, and conventional isolation sheets cannot be used for automatic replacement, which greatly increases the limitations of the use of the device. In view of this, we propose a bed and method for automatically replacing isolation sheets. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a hospital bed and method for automatically replacing isolation sheets, which solves the problem that bed sheets cannot be automatically replaced.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A hospital bed for automatically changing isolation sheets, comprising a support frame, the top ends of both sides of the support frame are fixedly connected with a fixing frame, the top end of the fixing frame is fixedly connected with a headboard, a transmission mechanism is arranged inside the fixing frame, the transmission mechanism is used for automatically changing sheets, a support plate is fixedly connected to the inner side wall of the fixing frame, the outer end of the support plate is fixedly connected with a bed board, and the bed board has a certain gap from the support frame; The transmission mechanism includes a guide rail, a first fixed plate, a second fixed plate, a roller and two groups of guide rollers, the guide rail is connected to the fixed frame through a first connecting plate, the support plate is fixedly connected to a guide rack through a second connecting plate, the roller and the two groups of guide rollers are rotatably connected to the side walls of the first fixed plate and the second fixed plate respectively, a gear is meshed on the inner side of the guide rack, the side wall of the first connecting plate is fixedly connected to a driving motor through a connecting rod, the output shaft of the driving motor is fixedly connected to the center of the gear, the outer side of the second fixed plate is fixedly connected to a fixing block, the fixing block is provided with a clamping mechanism, and the clamping mechanism is used to clamp and fix the bed sheet.

[0006] Preferably, the clamping mechanism includes a motor, the motor is fixedly connected to the inner wall of the fixed block, the output shaft of the motor is fixedly connected to a rotating plate, two groups of fixed clamping blocks are fixedly connected to the right side wall of the rotating plate, a threaded rod is rotatably connected to the center of the right side wall of the rotating plate, a threaded block is threadedly connected to the outer wall of the threaded rod, a connecting rod is hinged on the outer wall of the threaded block, and the other end of the connecting rod is hinged to a sliding clamping block.

[0007] Preferably, two sides of the fixing block are arranged in a through shape for dissipating heat from the motor, and the motor output shaft is located at the center of the rotating plate.

[0008] Preferably, a protrusion is fixedly connected to the top of the sliding clamp block and a matching groove is provided on the fixed clamp block, which are plugged into each other to increase friction with the bed sheet and prevent the bed sheet from falling off.

[0009] Preferably, the sliding clamping block is provided with two groups, upper and lower, which can clamp two groups of bed sheets in cooperation with the fixed clamping block, and the transmission mechanism and the clamping mechanism are provided at the head and foot of the bed.

[0010] Preferably, one end of one group of guide rollers and rollers is rotatably connected to the side wall of the first fixed plate, and the other end of another group of guide rollers and rollers is rotatably connected to the side wall of the second fixed plate.

[0011] Preferably, the upper and lower groups of the first connecting plates are fixedly connected to the upper and lower inner walls of the fixing frame respectively.

[0012] Preferably, a circle of teeth is provided on the inner side of the guide rack, and the teeth are arranged behind the second connecting plate, the roller and the two groups of guide rollers are respectively in contact with the inner and outer sides of the guide rail, and there is a certain gap between the two groups of guide rollers. The roller cooperates with the guide roller to clamp the side wall of the guide rail.

[0013] Preferably, lifting guardrails are provided on both the front and rear sides of the upper end of the support frame, and the lifting guardrails are used to protect both sides of the bed board.

[0014] A method for using a hospital bed with an automatic replacement of isolation sheets is applied to the above-mentioned hospital bed with an automatic replacement of isolation sheets, comprising the following steps: Step 1: Place the top set of sheets flat on the bed board, and place the four sides of the sheets between different fixed clamps and sliding clamps; Step 2: By rotating the threaded rod, the threaded rod drives the threaded block to move inward, and then the threaded block pushes the other end of the connecting rod to move outward, thereby pushing the sliding clamp block to move closer to the fixed clamp block to clamp the edge of the bed sheet; Step 3: Pass another set of clean sheets through the bottom of the bed board and fix them between the sliding clamp and the fixed clamp at the bottom in the same way; Step 4: Start the motor to drive the rotating plate to rotate, wrap the edges and corners of the bed sheet together and tighten them, so as to reduce wrinkles and prevent the bed sheet from falling off; Step 5: When the bed sheet needs to be replaced, the drive motor is started, the drive motor drives the gear to rotate, the gear moves along the guide rack, and then drives the connecting rod, the first fixed plate, the roller and the guide roller to move synchronously along the track of the guide rail; Step 6: The upper and lower sets of sheets are exchanged along the track, so that the clean sheets at the bottom are moved to the upper side, and the sheets that may be contaminated are moved to the lower side; Step 7: Make sure the newly replaced clean sheets are laid flat on the bed board, and check whether the fixed clamps and sliding clamps are firm.

[0015] The present invention provides a hospital bed and method for automatically replacing isolation sheets. It has the following beneficial effects: 1. The present invention realizes automatic replacement of bed sheets through a transmission mechanism and a clamping mechanism, which can ensure that when a patient checks in, the bed sheets in contact with the patient are clean and not contaminated by the accompanying personnel, thereby avoiding the situation where the patient's bed sheets are contaminated by the accompanying personnel and ensuring the patient's sleeping environment.

[0016] 2. The present invention realizes automatic replacement of bed sheets through a transmission mechanism and a clamping mechanism, which greatly reduces the workload of nursing staff when patients are admitted to the hospital and significantly improves the efficiency of bed sheet replacement. Nursing staff can devote the saved time and energy to more important nursing tasks, thereby improving the overall quality of nursing.

[0017] 3. The present invention reduces the chance of direct contact between nursing staff and contaminated bed sheets by cooperating with the transmission mechanism and the clamping mechanism, thereby reducing the risk of cross infection, especially in infectious disease wards and intensive care units, and can effectively protect the health and safety of nursing staff and other patients.

[0018] 4. The present invention can use conventional isolation sheets for automatic replacement, without the need to purchase additional special sheets, thus reducing the use limitations of the equipment, increasing its scope of application, and helping to reduce the hospital's operating costs and procurement pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall stereogram of the present invention; Figure 2 It is a three-dimensional schematic diagram of the fixing frame of the present invention; Figure 3 It is a three-dimensional schematic diagram of the first connecting plate and the second connecting plate of the present invention; Figure 4 It is a three-dimensional schematic diagram of the back side of the transmission mechanism of the present invention; Figure 5 It is a three-dimensional schematic diagram of a connecting rod of the present invention; Figure 6 It is a three-dimensional schematic diagram of the guide roller and the roller of the present invention; Figure 7 It is a three-dimensional schematic diagram of the clamping mechanism of the present invention; Figure 8 It is a side schematic diagram of the bed board of the present invention.

[0020] Among them, 1. support frame; 2. fixed frame; 3. headboard; 4. lifting guardrail; 5. bed board; 6. transmission mechanism; 61. first connecting plate; 62. second connecting plate; 63. guide rail; 64. driving motor; 65. guide rack; 66. gear; 67. connecting rod; 68. first fixed plate; 69. guide roller; 610. roller; 611. second fixed plate; 612. fixed block; 7. support plate; 8. clamping mechanism; 81. motor; 82. rotating plate; 83. fixed clamp block; 84. protrusion; 85. sliding clamp block; 86. threaded rod; 87. connecting rod; 88. threaded block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example

[0023] See also Figure 1-Figure 8The embodiment of the present invention provides a hospital bed with automatic replacement of isolation sheets, including a support frame 1, the support frame 1 provides stability and support force of the overall structure, the top ends of both sides of the support frame 1 are fixedly connected with a fixing frame 2, through which other components can be more firmly installed and supported, the top end of the fixing frame 2 is fixedly connected with a headboard 3, the headboard 3 provides reliable head support and protection, a transmission mechanism 6 is arranged inside the fixing frame 2, the transmission mechanism 6 realizes automatic replacement of sheets, reduces manual intervention, and improves work efficiency, the transmission track of the transmission mechanism 6 is arranged in a rounded rectangular shape, this special track design facilitates the smooth passage of sheets, reduces transmission jams, and the transmission mechanism Structure 6 is used for automatic replacement of bed sheets. A support plate 7 is fixedly connected to the inner side wall of the fixed frame 2. The support plate 7 provides a solid support surface to ensure that the bed board 5 does not shift. The outer end of the support plate 7 is fixedly connected to the bed board 5. The bed board 5 provides the main plane for the patient to lie down to ensure the patient's comfort. The support plate 7 is used to support the bed board 5. Lifting guardrails 4 are provided on both sides of the upper end of the support frame 1. The lifting guardrails 4 provide additional safety protection to prevent the patient from accidentally falling. The lifting guardrails 4 are used to protect both sides of the bed board 5 to prevent the patient from rolling off the bed board 5 when sleeping. The bed board 5 has a certain gap from the support frame 1 to facilitate the passage of bed sheets and improve replacement efficiency.

[0024] A preferred embodiment, such as Figure 3 , 4 As shown, the transmission mechanism 6 includes a guide rail 63, which provides a trajectory for the movement of the bed sheet to ensure the accuracy of the moving path. The upper and lower ends of the guide rail 63 are fixedly connected with a first connecting plate 61, and the first connecting plate 61 is fixedly connected to the inner wall of the fixed frame 2. The first connecting plate 61 provides a solid fixed support to ensure the stability of the structure. The upper and lower groups of first connecting plates 61 are respectively fixedly connected to the upper and lower inner walls of the fixed frame 2. The guide rail 63 is fixed by the first connecting plate 61, and the bed board 5 is located at the center of the guide rail 63, which can facilitate the replacement of bed sheets, optimize the operating space for changing bed sheets, and facilitate quick replacement. The upper and lower side walls of the support plate 7 are fixedly connected with The second connecting plate 62 further enhances the overall structural stability. A guide rack 65 is fixedly connected to the outer wall of the second connecting plate 62. The guide rack 65 provides a meshing path for the gear 66 to ensure the high efficiency and stability of the transmission. The second connecting plate 62 is used to support and fix the guide rack 65. The guide rack 65 is located in the central area of ​​the guide rail 63 and has the same shape. This consistent design ensures smooth transmission. A circle of teeth is provided on the inner side of the guide rack 65, and the teeth are provided at the rear of the second connecting plate 62. A gear 66 is meshed on the inner side of the guide rack 65. The gear 66 realizes transmission by meshing with the rack to ensure the reliability of the mechanism movement.

[0025] A preferred embodiment, such as Figure 5 , 6 As shown, the transmission mechanism 6 also includes a roller 610 and two groups of guide rollers 69. The roller 610 and the guide roller 69 can effectively reduce friction and noise and improve transmission stability. The roller 610 and the two groups of guide rollers 69 are in contact with the inner and outer sides of the guide rail 63 respectively. There is a certain gap between the two groups of guide rollers 69 to facilitate the passage of the first connecting plate 61 to avoid interference during movement. This design avoids jamming between components during transmission and improves the overall movement efficiency. One end of one group of guide rollers 69 and the roller 610 is rotatably connected to the side wall of the first fixed plate 68, and the other end of the other group of guide rollers 69 and the roller 610 is rotatably connected to the side wall of the second fixed plate 611. The design of the first fixed plate 68 and the second fixed plate 611 ensures the stable operation of the guide roller 69 and the roller 610. The roller 610 cooperates with the guide roller 69 to clamp the side wall of the guide rail 63, so that It can move along the track of the guide rail 63, ensuring that the transmission system moves stably along the predetermined track. The side wall of the first connecting plate 61 is fixedly connected with a connecting rod 67, and the other end of the connecting rod 67 is fixedly connected with a driving motor 64. The connecting rod 67 is connected to the driving motor 64 to realize power transmission. The output shaft of the driving motor 64 is fixedly connected to the center of the gear 66, and the gear 66 is driven by the driving motor 64 to rotate, so that it can move along the track of the guide rack 65. The use of the driving motor 64 simplifies the operation steps and realizes automatic control. The outer side of the second fixed plate 611 is fixedly connected with a fixing block 612, and the fixing block 612 is provided with a clamping mechanism 8. The setting of the fixing block 612 and the clamping mechanism 8 ensures that the bed sheet is firmly fixed and smoothly replaced. The clamping mechanism 8 is used to clamp and fix the bed sheet. The clamping mechanism 8 can effectively prevent the bed sheet from slipping and improve the replacement accuracy and efficiency.

[0026] A preferred embodiment, such as Figure 7 As shown, the clamping mechanism 8 includes a motor 81, which is fixedly connected to the inner wall of the fixed block 612, and the two sides of the fixed block 612 are arranged in a through shape to facilitate the heat dissipation of the motor 81. The output shaft of the motor 81 is fixedly connected to the rotating plate 82, and the output shaft of the motor 81 is located at the center of the rotating plate 82. Two groups of fixed clamping blocks 83 are fixedly connected to the right side wall of the rotating plate 82. A threaded rod 86 is rotatably connected to the center of the right side wall of the rotating plate 82, and a threaded rod 86 is threadedly connected to the outer wall of the threaded rod 86. It is connected to a threaded block 88, a connecting rod 87 is hinged on the outer wall of the threaded block 88, and a sliding clamp 85 is hinged on the other end of the connecting rod 87. The top of the sliding clamp 85 is fixedly connected to a protrusion 84 and a matching groove is provided on the fixed clamp 83 to facilitate mutual insertion between them to increase the friction with the bed sheet and prevent the bed sheet from falling off. The sliding clamp 85 is provided with two groups, upper and lower, which can clamp two sheets in cooperation with the fixed clamp 83. The transmission mechanism 6 and the clamping mechanism 8 are both provided at the head and foot of the bed.

[0027] Working principle: Place the upper set of sheets on the bed board, and place the four sides of the sheets between different fixed clamps and sliding clamps respectively. At this time, by rotating the threaded rod, the threaded rod drives the threaded block to move inward, so that the threaded block drives the other end of the connecting rod to move outward, thereby pushing the sliding clamp close to the fixed clamp, so as to clamp the edge of the sheet. At this time, pass another set of sheets under the bed board and fix them between the sliding clamp and the fixed clamp below in the same way. At this time, the upper sheets can be used for accompanying personnel to sit on, and can be made to move by starting the motor. The rotating plate rotates, so that the corners of the sheets are entangled together to tighten the sheets, reduce wrinkles and prevent the sheets from falling off. When the patient needs to rest, the drive motor is started to drive the gear to rotate. The gear rotates along the guide rack to drive the connecting rod and the first fixed plate, the roller, and the guide roller to move synchronously along the track of the guide rail. The upper and lower sets of sheets are exchanged along the track at this time, so that the clean sheets at the bottom are switched to the upper ones, and the sheets that may be contaminated are switched to the lower ones, so as to ensure that the sheets are clean and will not contaminate the patients.

[0028] In another embodiment, a method for using a hospital bed with automatically changing isolation sheets comprises the following steps: Step 1: Place the upper set of bed sheets flatly on the bed board 5 , and place the four sides of the bed sheets between different fixed clamps 83 and sliding clamps 85 .

[0029] Step 2: By rotating the threaded rod 86, the threaded rod 86 drives the threaded block 88 to move inward, and then the threaded block 88 pushes the other end of the connecting rod 87 to move outward, thereby pushing the sliding clamp 85 to move closer to the fixed clamp 83 to clamp the edge of the sheet.

[0030] Step 3: Pass another set of clean sheets through the bottom of the bed board 5 and fix them between the sliding clamp block 85 and the fixed clamp block 83 below in the same way.

[0031] Step 4: Start the motor 81 to drive the rotating plate 82 to rotate, so as to wrap and tighten the edges and corners of the bed sheet together, thereby reducing wrinkles and preventing the bed sheet from falling off.

[0032] Step 5: When the bed sheet needs to be changed, start the drive motor 64, which drives the gear 66 to rotate, and the gear 66 moves along the guide rack 65, thereby driving the connecting rod 67, the first fixed plate 68, the roller 610 and the guide roller 69 to move synchronously along the track of the guide rail 63.

[0033] Step 6: The upper and lower sets of sheets are exchanged along the trajectory, so that the clean sheets at the bottom are moved to the upper side, and the sheets that may be contaminated are moved to the lower side.

[0034] Step 7: Ensure that the newly replaced clean bed sheet is laid flat on the bed board 5, and check whether the fixed clamp block 83 and the sliding clamp block 85 are firm.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hospital bed with automatic replacement of isolation sheets, comprising a support frame (1), characterized in that: The top ends of both sides of the support frame (1) are fixedly connected to a fixed frame (2), the top ends of the fixed frame (2) are fixedly connected to a headboard (3), a transmission mechanism (6) is arranged inside the fixed frame (2), the transmission mechanism (6) is used for automatically changing bed sheets, a support plate (7) is fixedly connected to the inner side wall of the fixed frame (2), the outer end of the support plate (7) is fixedly connected to a bed board (5), and the bed board (5) has a certain gap from the support frame (1); The transmission mechanism (6) comprises a guide rail (63), a first fixed plate (68), a second fixed plate (611), a roller (610) and two groups of guide rollers (69); the guide rail (63) is connected to the fixed frame (2) via a first connecting plate (61); the support plate (7) is fixedly connected to a guide rack (65) via a second connecting plate (62); the roller (610) and the two groups of guide rollers (69) are rotatably connected to the first fixed plate (68) and the second fixed plate (611) respectively. ), a gear (66) is meshed on the inner side of the guide rack (65), the side wall of the first connecting plate (61) is fixedly connected to a drive motor (64) via a connecting rod (67), the output shaft of the drive motor (64) is fixedly connected to the center of the gear (66), and the outer side of the second fixing plate (611) is fixedly connected to a fixing block (612), and a clamping mechanism (8) is provided on the fixing block (612), and the clamping mechanism (8) is used to clamp and fix the bed sheet.

2. A hospital bed with automatic replacement of isolation sheets according to claim 1, characterized in that: The clamping mechanism (8) comprises a motor (81), the motor (81) being fixedly connected to the inner wall of the fixed block (612), the output shaft of the motor (81) being fixedly connected to a rotating plate (82), the right side wall of the rotating plate (82) being fixedly connected to two groups of fixed clamping blocks (83), a threaded rod (86) being rotatably connected to the center of the right side wall of the rotating plate (82), a threaded block (88) being threadedly connected to the outer wall of the threaded rod (86), a connecting rod (87) being hingedly connected to the outer wall of the threaded block (88), and the other end of the connecting rod (87) being hingedly connected to a sliding clamping block (85).

3. A hospital bed with automatic replacement of isolation sheets according to claim 2, characterized in that: Both sides of the fixed block (612) are arranged in a through-connection shape, and are used to dissipate heat for the motor (81); the output shaft of the motor (81) is located at the center of the rotating plate (82).

4. The hospital bed with automatic replacement of isolation sheets according to claim 2, characterized in that: A protrusion (84) is fixedly connected to the top of the sliding clamp block (85), and a matching groove is provided on the fixed clamp block (83), and the protrusion (84) and the groove are plugged into each other.

5. The hospital bed with automatic replacement of isolation sheets according to claim 2, characterized in that: The sliding clamping blocks (85) are provided in two groups, one above the other, and can be used together with the fixed clamping blocks (83) to clamp two groups of bed sheets. The head and foot of the bed are both provided with a transmission mechanism (6) and a clamping mechanism (8).

6. The hospital bed with automatic replacement of isolation sheets according to claim 1, characterized in that: One end of one group of guide rollers (69) and rollers (610) is rotatably connected to the side wall of the first fixed plate (68), and the other end of another group of guide rollers (69) and rollers (610) is rotatably connected to the side wall of the second fixed plate (611).

7. The hospital bed with automatic replacement of isolation sheets according to claim 1, characterized in that: The upper and lower groups of the first connecting plates (61) are respectively fixedly connected to the upper and lower inner walls of the fixing frame (2).

8. The hospital bed with automatic replacement of isolation sheets according to claim 1, characterized in that: A circle of teeth is arranged on the inner side of the guide rack (65), and the teeth are arranged behind the second connecting plate (62). The roller (610) and the two groups of guide rollers (69) are in contact with the inner and outer sides of the guide rail (63) respectively. There is a certain gap between the two groups of guide rollers (69). The roller (610) and the guide roller (69) cooperate to clamp the side wall of the guide rail (63).

9. The hospital bed with automatic replacement of isolation sheets according to claim 1, characterized in that: Lifting guardrails (4) are provided on both the front and rear sides of the upper end of the support frame (1), and the lifting guardrails (4) are used to protect both sides of the bed board (5).

10. A method for replacing a hospital bed with an automatic replacement of an isolation sheet, applied to the hospital bed with an automatic replacement of an isolation sheet as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the upper set of bed sheets flatly on the bed board (5), and place the four sides of the bed sheets between different fixed clamps (83) and sliding clamps (85); Step 2: By rotating the threaded rod (86), the threaded rod (86) drives the threaded block (88) to move inward, and then the threaded block (88) pushes the other end of the connecting rod (87) to move outward, thereby pushing the sliding clamping block (85) to move closer to the fixed clamping block (83) to clamp the edge of the bed sheet; Step 3: Pass another set of clean sheets through the bottom of the bed board (5) and fix them between the sliding clamp block (85) and the fixed clamp block (83) below in the same way; Step 4: starting the motor (81) so that the motor (81) drives the rotating plate (82) to rotate, thereby wrapping and tightening the edges and corners of the bed sheet together, thereby reducing wrinkles and preventing the bed sheet from falling off; Step 5: When the bed sheet needs to be replaced, the drive motor (64) is started, the drive motor (64) drives the gear (66) to rotate, the gear (66) moves along the guide rack (65), and then drives the connecting rod (67), the first fixed plate (68), the roller (610) and the guide roller (69) to move synchronously along the track of the guide rail (63); Step 6: The upper and lower sets of sheets are exchanged along the track, so that the clean sheets at the bottom are moved to the upper side, and the sheets that may be contaminated are moved to the lower side; Step 7: Ensure that the newly replaced clean bed sheet is laid flat on the bed board (5), and check whether the fixed clamp block (83) and the sliding clamp block (85) are secure.

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