Auxiliary structure for replacing bed sheet and lifting and moving mattress backwards

Abstract

The invention discloses an auxiliary structure for lifting and moving a mattress backwards when a bed sheet is replaced. Relates to the technical field of mechanical devices for lifting and backwards moving mattresses when bed sheets of hotel guest rooms are replaced, and fills the blank of application of auxiliary devices when bed sheets of hotel guest rooms are replaced. A rocker arm handle is mounted outside the bed box, and a ratchet wrench assembly, a rocker arm shaft, a linkage shaft, six supporting rocker arm assemblies, a supporting plate correspondingly hinged to the surface of the lower bed body and the like are mounted in the bed box; the mattress is lifted up and moved backwards in a one-time manual pulling and pressing easy mode. The physical burden of a waiter during replacement of the bed sheet is relieved, the frequency of stooping is reduced, the harm to the body caused by long-term stooping work is reduced, and the working comfort and safety are improved; according to the structure, the principle of lever force is utilized, the structure is simple, the mattress is lifted up and moved backwards with small force, and an operation space meeting the standard of textbooks is formed. The system is mainly suitable for guest rooms of star hotels.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical devices for lifting and moving back a mattress, and specifically to an auxiliary structure for lifting and moving back a mattress when changing bed sheets. Background Art

[0002] The present invention relates to a technical application for a bed sheet changing operation in a hotel room. Currently, there is no technical literature report, stay experience or rumors related to hotels, and this is a blank in the application technology of an auxiliary device.

[0003] Changing bed sheets has long relied on manual labor. The demanding physical labor has kept young talent out of the workforce, leading to an aging workforce and a recruitment dilemma for female employees.

[0004] The chain reaction of staff shortage is that aging practitioners have to face an excessive workload every day.

[0005] Due to staff vacancies, a typical housekeeping attendant's daily workload involves changing bed linens for over 20 rooms. This includes rooms with varying sizes of double beds, requiring at least 30 beds to be replaced. This includes cleaning, dusting, vacuuming, cleaning, and replacing supplies, among other tasks.

[0006] Only a few people can complete these jobs in 8 hours, and most people work 10 to 12 hours or more. Such long working hours and physical overdrafts often make them exhausted when they get off work, forming a vicious cycle and causing these older women to suffer from diseases in their waists and other parts of their bodies.

[0007] The higher the hotel star rating, the heavier and softer the mattress.

[0008] Changing sheets takes the longest time and requires the most physical effort. To save energy, the waiter does not follow the standard procedure of dragging the bed box outwards to provide space for wrapping the sheets.

[0009] One less step saves energy, but the cost is that it increases the difficulty of wrapping the sheet at the front end, and the quality standard is also lowered.

[0010] The remaining steps cannot be missed. When changing the sheets, the waiter needs to lift the mattress with one hand and tuck the sheets under the mattress with the other hand to wrap them, or lift the mattress and then use his knees to support it, using a very awkward posture to wrap the sheets with both hands. You can imagine how efficient this is.

[0011] The number of times you need to bend over to lift the three sides of a heavy and soft mattress varies from person to person.

[0012] Because of the rigid standards of star-rated hotels, bed boxes must be installed with bed box covers. This cover makes it difficult to lift the mattress and put in the sheets.

[0013] When lifting the mattress or stuffing in the sheets, the cover of the bed box will be lifted up or stuffed in with the sheets from time to time. If the cover is lifted up, you can only put the mattress back down and lift it again. If the cover is stuffed in with the sheets, you still need to pull it out and stuff it in with the sheets.

[0014] There is no telling how many times this repetitive operation will occur, which only increases the waiter's anxiety. As a result, the waiter's physical exertion and work efficiency are greatly reduced.

[0015] To address this issue, this technical solution incorporates an interconnected rocker-link mechanism within the bed box structure. The mattress can be raised and moved backwards by operating a rocker handle mounted on the front exterior of the bed box. After changing the sheets, the mattress automatically returns to its original position by gently pushing the rear end, leveraging the weight of the mattress.

[0016] With one simple operation, the mattress is lifted and moved back. This provides space for wrapping the sheet at each corner in four two-handed steps. This saves energy, increases efficiency, and improves wrapping quality.

[0017] The technical development and application of auxiliary devices for changing bed sheets will fill the gap in the application of auxiliary device technology in the hotel room service industry.

[0018] Saving physical effort, improving work efficiency, and enhancing product quality indirectly increase the hotel's operating profitability. Improved service quality earns guest recognition and boosts room occupancy rates. Perhaps expanding the scope of professionals will attract new talent and alleviate the recruitment dilemma. Summary of the Invention

[0019] In response to the gap in the application of auxiliary devices in hotel guest rooms, the present invention provides an auxiliary structure for lifting and moving the mattress backward when changing bed sheets, reducing the physical output of manual labor and conforming to the trend of technological development.

[0020] To achieve the above objectives, the present invention is implemented through the following technical solutions: an auxiliary structure for lifting and moving the mattress backward when changing sheets, with corresponding components arranged inside and outside the bed box for combined linkage. The linkage components installed inside and outside the bed box are composed of a rocker handle, a ratchet wrench assembly, a rocker shaft, a linkage shaft, and six support rocker assemblies and six corresponding support plates connected by hinges; the pulling and pressing force of the rocker handle is output to the rocker shaft through the ratchet wrench for synchronous rotation; the rocker shaft drives the linkage shaft to rotate through the rotating tension of the rocker assembly; the rotation of the linkage shaft drives the support rocker assemblies fixed at both ends to rotate synchronously; the two rotating support rocker assemblies are linked by steel wires to the two support rocker assemblies in the vertical row behind them to form synchronization; the upper ends of the support rocker assemblies are respectively connected to support plates by hinges; the support plates are attached to the surface of the bed box and form surface contact with the bottom surface of the mattress through the connection with the support rocker assembly; the rotation of the support rocker assembly causes the six support plates connected by the hinges to have a synchronous planar rotation trajectory. The movement reflected in this running trajectory on the mattress is the process of the mattress lifting and moving backward; the two support plates near the tail of the bed box are connected to the synchronized tail plate through a thin metal sheet; an adjusting arm is installed on the linkage shaft and connected to the buffer, and the other end of the buffer is fixed to the lower bed body, so that the mattress returns to its original position slowly and steadily.

[0021] This structure utilizes interconnected components inside and outside the lower bed box. With a simple pull-and-press operation, leveraging the principle of leverage, it generates an amplified lifting force on the support plate, lifting and moving the mattress backward. This avoids the aforementioned drawbacks, saving effort, avoiding repetitive operations, improving efficiency, reducing the risk of injury, and enhancing product quality.

[0022] Preferred

[0023] The ratchet wrench assembly utilizes the characteristics of a ratchet wrench and automatically switches the load direction by installing a spring positioner on each side [one of which is fixed and the other rotates synchronously with the shaft], realizing the operation process of pushing for no load and pulling for load, providing smooth operation of lifting and moving the mattress backward.

[0024] Preferred

[0025] The six support rocker arm assemblies and the support plate combination composed of the support rocker arm and the tension rocker arm, wherein the connection point between the support rocker arm and the support plate rotates a quarter of a circle, and the rotation trajectory formed by this point is reflected on the six support plates as the process of lifting and moving the mattress backward.

[0026] The preferred support plate is connected to the tail plate at the rear end. Since the connection is made of a thin metal plate, the tail plate can only move forward and backward in a plane. The sheet is wrapped between the mattress and the tail plate, and there is a relatively constant speed movement when returning to its position, ensuring the integrity of the sheet wrapped after the mattress returns to its position.

[0027] Preferred

[0028] The buffer absorbs the impact force generated by the mattress's own weight as it returns to its original position. One end of the buffer is connected to an adjustment arm fixed to the linkage shaft, and the other end is fixed to the bed frame. This absorbs the impact force, allowing the mattress to return to its original position slowly and smoothly.

[0029] Priority,

[0030] The support rocker arm assembly consists of a tension rocker arm and a support rocker arm, each at a 135° angle to the other, secured by a support fixing plate. A positioning stop is installed on the support fixing plate to limit the rotational position of the tension rocker arm, maintaining a stable state using the weight of the mattress.

[0031] Beneficial effects

[0032] This invention provides an auxiliary structure for lifting and shifting a mattress when changing sheets. This auxiliary structure eliminates repeated bending and single-handed operation with a simple, one-time manual pull and press. This simple, one-time pull and press frees both hands, improving efficiency and quality. It reduces the physical burden on workers when changing sheets, reduces the risk of injuries to the waist, arms, and other areas, and enhances work comfort. This design is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention creates an auxiliary structure for lifting and moving the mattress backward when changing bed sheets, and a schematic diagram of the main structure of the bed box when the mattress is in a non-working state.

[0034] Figure 2 The present invention creates an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and a main structural diagram of the working process of lifting and moving the mattress backward.

[0035] Figure 3 This is a schematic diagram of the main structure of the auxiliary structure for lifting and moving the mattress backward when changing bed sheets, and the rocker handle returns to its original position during operation.

[0036] Figure 4 The present invention creates an auxiliary structure for lifting and moving the mattress backward when changing bed sheets, and a schematic diagram of the structure of the support plate on the bed box from a top view.

[0037] Figure 5The present invention provides an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and a schematic top-view cross-sectional structure diagram of the linkage relationship between the various components.

[0038] Figure 6 The present invention provides an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and a schematic diagram of the main cross-sectional structure of the linkage mechanism in a non-working state.

[0039] Figure 7 The present invention creates an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and is a schematic diagram of the main cross-sectional structure of the linkage mechanism in the working state.

[0040] Figure 8 The present invention creates an auxiliary structure for lifting and moving the mattress backward when changing sheets, and a main structural diagram of the relative positions of the tension rocker arm, the support rocker arm, the support fixing plate, and the positioning block in the support rocker arm assembly.

[0041] Figure 9 The present invention creates an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and a schematic diagram of the main structure of a ratchet wrench assembly.

[0042] Figure 10 The present invention provides an auxiliary structure for lifting and moving a mattress backward when changing bed sheets, and a schematic diagram of the top view of the ratchet wrench assembly.

[0043] Figure: 1. Rocker handle; 2. Ratchet wrench assembly; 3. Rocker shaft; 4. Rocker arm; 5. Linkage shaft; 6. Connecting rod; 7. Adjusting arm; 8. Tension rocker arm; 9. Support rocker arm; 10. Wire rope; 11. Buffer; 12. Support plate; 13. Support plate; 14. Tail plate; 15. Lower bed; 16. Upper mattress; a. Spring positioner; b. Spring positioner; DETAILED DESCRIPTION

[0044] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The detailed description is as follows.

[0045] See also Figure 1-10The present invention provides a technical solution: an auxiliary structure for lifting and moving the mattress backward when changing the bed sheets, which is arranged inside and outside the bed box 15. A rocker handle 1 is installed on the outside of the bed box 15. It is connected to the rocker shaft 3 through the ratchet wrench assembly 2. The force of the rocker handle 1 is converted into a rotational tension by the rocker 4 on the rocker shaft 3 transmitted by the ratchet wrench. This tension is transferred to the rocker 4 on the linkage shaft 5 through the connecting rod 6, and the linkage shaft 5 rotates. The rotational force of the linkage shaft 5 acts on the supporting rocker assemblies at both ends of the linkage shaft 5, as shown in Figure [5].

[0046] The ratchet wrench assembly 2 utilizes the characteristics of the ratchet wrench that pulling is loaded and pushing is unloaded or vice versa. The left spring positioner a is fixed and the right spring positioner b is synchronized with the rocker shaft 3 by the spring returners installed on both sides of the circumferential track of the ratchet teeth of the ratchet wrench [the opposite is true when the rocker handle is installed on the right side in front of the bed]. The spring force is used to bounce the raised ratchet teeth into the ratchet cavity to automatically switch the load of the ratchet wrench, simplifying the operation process, as shown in Figures [9] and

[10] .

[0047] The six support rocker arm assemblies are composed of tension rocker arms 8 (slightly larger than 40 mm) and support rocker arms 9 (preferably 40 mm in length) with an angle of 135° to each other, and are evenly distributed and fixed on one side of the bed box 15 in groups of three via support fixing plates 12. The tension rocker arms 8 of the support rocker arm assemblies are connected in series via steel wire ropes in the longitudinal arrangement, and the horizontal angle of the tension rocker arms 8 in the non-working state is 45°. The two support rocker arm assemblies at the front end of the bed box are synchronized with the linkage shaft 5. The rotational force of the linkage shaft 5 is converted into the rotation of the tension rocker arm 8 in the support rocker arm assembly, and the two support rocker arm assemblies at the rear of the linkage are synchronized. The support fixing plate 12 limits the positioning of the tension rocker arm 8 when it rotates 90°, as shown in Figure [8].

[0048] The other end of the support rocker arm 9, which is at an angle of 135° to the tension rocker arm 8, is connected to the pallet 13 on the bed box [depending on the strength of the pallet, the thickness should not exceed 5 mm, and the four sides should be 200 mm long]. The connection axis point is 3 to 5 mm above the vertical line of gravity. The pallet 13 itself is always in a horizontal state under the gravity of the mattress 16. The 90° rotation of the support rocker arm 9 and the running trajectory of the pallet 13 connected to it are a 90° plane rotation. The six horizontally rotating pallets 13 lift and move the mattress. After the mattress 16 is lifted, it remains stable under the action of gravity. When the center of gravity of the mattress 16 is at the working position, the distance between the center of gravity of the mattress 16 and the support center of gravity is small, so it does not require much force to push it back, as shown in Figures [7] and [8].

[0049] The tail plate 14 is connected to the bed box rear end support plate 13 by a metal sheet. Because the metal sheet is characterized in that the tail plate 14 cannot be lifted, the tail plate 14 can only be attached to the surface of the bed box 15 and move forward and backward, as shown in Figure [7].

[0050] The mattress 16 automatically returns to its original position and generates an impact force under the action of gravity. The buffer 11 is connected to the adjustment arm 7 on the linkage shaft 5, and the other end of the buffer 11 is fixed to the bed box 15. The action of the buffer 11 makes the automatic return process of the mattress 16 slow and smooth, as shown in Figure [5].

[0051] The waiter only needs to pull and press the rocker handle 1, which is no longer than 400 mm, once. Through the principle of lever force, a force that matches a woman's arm is converted into a uniform lifting force on the six support plates 13, thereby lifting and moving back the mattress 13 weighing 40 kg.

[0052] Through a one-time operation, with minimal effort, both hands are freed, a convenient operating space is provided, the operation process is simplified, and some repetitive operations are avoided, thereby improving work efficiency and reducing the risk of physical injury caused by overwork.

[0053] This embodiment further provides that the ratchet wrench assembly utilizes the characteristics of the ratchet wrench and, through the combined use of a spring positioner, achieves a state in which the spring is contacted during the push-pull process, automatically switching the load direction of the ratchet wrench under the action of the spring force. When the rocker handle is pulled, it is a loaded state. The force of the rocker handle is transmitted to the rocker shaft through the ratchet wrench and converted into a pulling force through the rocker rotation. This pulling force drives the subsequent linkage assembly to achieve the working purpose.

[0054] This facility example is further configured as follows: the six support rocker arm assemblies. Each support rocker arm assembly is fixed by a tension rocker arm and a support rocker arm with an angle of 135 degrees to each other through a support fixing plate. A [positioning block] is installed on the fixing plate to limit the rotation angle of the tension rocker arm. The length of the support rocker arm should be 40 mm, and the tension rocker arm can be slightly longer. The six support rocker arm assemblies are arranged in a row of three, connected in series by steel wire ropes, and divided into two groups and evenly distributed near the bedside in the bed box. The two support rocker arm assemblies at the front end are connected and synchronized by a linkage shaft.

[0055] This embodiment further configures the six support rocker arm assemblies to correspond to hinged support plates. The tension rocker arm in the support rocker arm assembly rotates 90° under tension, and the synchronized support rocker arm moves 40 mm backward and 40 mm upward. The lifting force of the support rocker arm is transmitted to the support plates. The uniform lifting force of the six support plates lifts the mattress, moves it backward, and maintains its stability. This process achieves the primary purpose of this auxiliary structure.

[0056] This embodiment further features a tailboard at the rear of the bed box, connected to the two rear support plates via a thin metal plate. The properties of the connecting metal plate ensure that the tailboard can move synchronously with the support plates and cannot be lifted, but can only move forward and backward attached to the bed box surface. This ensures that the wrapped sheet returns to its original position at the same relative speed as the mattress.

[0057] This embodiment further provides that the mattress requires minimal push or pull during return. After the center of gravity of the mattress passes the support point, the mattress's weight generates an impact force that adversely affects the bed and auxiliary devices. The impact force is absorbed by the buffer mounted on the linkage shaft, allowing the mattress to return slowly and smoothly.

[0058] The detailed connection means are well known in the art; Figure 1-10 As shown, a mattress 16 is placed on a bed frame 15, with the rocker handle 1 in a vertical position in its non-operating state. After initial work is completed, the rocker handle 1 returns to its original position, contacting the raised ratchet teeth of the ratchet wrench and being ejected into the ratchet cavity by spring positioner a. At this point, the rocker handle is unloaded. As the mattress returns, spring positioner b, synchronized with the rocker shaft 3, approaches the raised ratchet teeth at the other end, which have already been ejected into the cavity by spring positioner a. Pulling the rocker handle 1 returns it to unloaded operation. Continued pulling causes the raised ratchet teeth to contact spring positioner b and be ejected into the cavity, converting it into a load. The tension of the rocker handle 1 is transmitted through the ratchet wrench to the rocker shaft 3. This force is converted into a rotational tension by the rocker arm 4 on the rocker shaft 3, which is then transferred to the rocker arm 4 on the linkage shaft 5 via the connecting rod 6. The rotational tension of the rocker arm 4 on the linkage shaft 5 is then transmitted through the linkage shaft 5 to the support rocker arm 9 and the tension rocker arm 8 on the supporting rocker arm assembly at its ends. The rotational force of the support rocker arm 9 lifts and moves the pallet 13 backward. The tension rocker arm 8 is linked to the two tension rocker arms 8 in the rear longitudinal row by a steel wire rope, and the support rocker arm 9 lifts and moves back the corresponding supporting plates 13 to achieve synchronization. The purpose of the auxiliary device is to lift and move the six supporting plates 13 synchronously to stabilize the mattress 16.

[0059] The sheet wrapped at the tail end of the mattress 16 can only be stuffed between the mattress 16 and the support plate 14, so that the wrapped sheet is kept in maximum synchronization with the mattress 16. The buffer is to dissolve the impact force of the mattress returning to its original position.

[0060] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0061] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An auxiliary structure for lifting and moving a mattress backward for changing bed sheets, comprising a bed box 15 and a mattress 16, characterized in that. The bed box 15 is installed with a rocker handle on the outside and a ratchet wrench assembly and a linkage assembly inside, including a rocker shaft, a linkage shaft, a support rocker assembly consisting of six support rockers 9 and a tension rocker arm 8, and six support plates 13 and a tail plate 14 corresponding to each other on the bed box 15, etc., and a built-in buffer 11.

2. An auxiliary structure for lifting and moving the mattress backward when changing bed sheets according to claim 1, characterized in that: The force applied to the rocker handle 1, rotating 90°, is transmitted through the ratchet wrench assembly 2 to the linkage rocker shaft 3, which is converted into a rotational tension through the rotating rocker arm 4. This rotational tension, transferred through the connecting rod 6, pulls the rocker arm 4 on the linkage shaft 5. The rotational force of the linkage shaft 5 rotates the support rocker arm 9 and the tension rocker arm 8 in the support rocker arm assemblies at its ends. The support rocker arm 9 rotates the hinged support plate 13 in a planar rotational trajectory. This planar rotational trajectory of the support plate 13 represents the process of lifting and moving the mattress 16 backward.

3. An auxiliary structure for lifting and moving the mattress backward when changing bed sheets according to claim 1, characterized in that: The ratchet wrench assembly 2 is arranged on the front side of the bed box 15, and consists of a ratchet wrench, a fixed left spring positioner a, and a right spring positioner b synchronized with the rocker shaft 3 [the left and right positions are opposite when the rocker handle is installed on the right side of the bed box 15]; the spring positioner a or b is to bounce the corresponding ratchet teeth from the tilted outside into the tooth cavity to achieve load switching; one end of the ratchet wrench assembly is axially connected to the rocker handle 1, and the other end is axially connected to the rocker shaft 3; the rocker handle 1 is in a vertical state when it is not working. Through the pulling and pressing operation, the loaded ratchet wrench is linked to the subsequent components; after the rocker handle 1 is completed through a pulling and pressing operation, it needs to be immediately pushed back to the original position; the operation process of pushing the rocker handle 1 back to the original position is to automatically switch the load direction through the spring force of the spring positioner a, and reserve the no-load rotation direction for the return of the mattress 16; after the mattress 16 returns, the spring positioner [b] rotates synchronously with the rocker shaft [3], approaching the ratchet teeth of the ratchet wrench, providing the conditions for the next working load switching; the ratchet wrench load force is converted into a rotational tension by driving the rocker [4] through the rocker shaft [3]. Under the transition of the connecting rod [6], this tension is transmitted to the supporting rocker arm components at both ends through the connecting shaft [5], and the six supporting rocker arm components rotate synchronously.

4. An auxiliary structure for lifting and moving the mattress backward when changing bed sheets according to claims 1 and 2, characterized in that. The six support rocker arm assemblies composed of the support rocker arm 9 and the tension rocker arm 8 arranged in the bed box are fixed by the support fixing plate 12, three in a group, and evenly distributed along the edge of the bed box 16; the two front end components of the support rocker arm assemblies are connected synchronously by the connecting shaft 5, and the two rear end components are connected by a wire rope to realize the synchronization of the six rocker arm assemblies; the rocker arm assembly is fixed in position by the tension rocker arm 8 and the support rocker arm 9 at an angle of 135° to each other through the support fixing plate 12; the length of the support rocker arm 9 is preferably 40 mm, and the tension rocker arm 8 can be greater than 40 mm; the support rocker arm 9 in the vertical working state is connected The point exceeds the lower axis point by 3 to 5 mm; the support fixing plate 12 is installed with a [positioning block], and the tension rocker arm [8] is stabilized at a horizontal angle of 45° through the [positioning block]; the tension rocker arm 8 is stabilized at a horizontal angle of 45°, and the support rocker arm 9 is vertical. After the mattress 16 is lifted, the gravity passes over the rotation center point of the tension rocker arm 8 and the support rocker arm 9, maintaining a stable state; after the mattress 16 is lifted, the center of gravity of the support rocker arm 9 is slightly offset, and the thrust is not large when the mattress returns to its original position; after the center of gravity of the support rocker arm 9 is pushed across the support center of gravity line, it automatically returns to its original position under the action of the gravity of the mattress 16.

5. The auxiliary structure for lifting and moving the mattress backward when changing bed sheets according to claim 1, characterized in that. The six support rocker arm assemblies, consisting of the support rocker arm 9 and the tension rocker arm 8, are connected to six corresponding support plates 13 via hinges. The lower surfaces of the six support plates align with the upper surface of the bed box 15 and the lower surface of the mattress. Under the weight of the mattress 16, the support plates 13 can only move in a two-dimensional plane. Under the rotational force of the support rocker arm 9, the six support plates 13 follow a two-dimensional trajectory, which represents the process of lifting and moving the mattress backward. The tail plate 14 is connected to the two support plates 13 at the rear of the bed box via a thin metal plate. Due to the characteristics of the thin metal plate, the tail plate 14 cannot be lifted and can only move horizontally while attached to the surface of the bed box 15. Its function is to maintain the synchronization of the wrapped sheet and the return of the mattress 16.

6. An auxiliary structure for lifting and moving the mattress backward when changing the bed according to claim 4, characterized in that: After being lifted, the mattress 16 automatically returns to its original position under the force of a force. The weight of the mattress 16 generates an impact force. The buffer 11, connected to the linkage shaft 5 via the adjustment arm 7 and fixed to the bed frame 15, absorbs the impact force and ensures that the mattress 16 returns to its original position slowly and smoothly.

7. The auxiliary structure for lifting and moving the mattress backward when changing bed sheets according to any one of claims 1 to 6, characterized in that When changing the bed sheet, pull the rocker arm handle (1) to raise the mattress. After raising it, push the handle back to the starting position so that the ratchet handle touches the spring to change the direction of force. After laying the bed sheet, gently push the mattress. Under the action of the buffer 11, the mattress slowly returns to the starting position, completing a working cycle. The tail plate 14 wraps the bed sheet between the mattress 16, and the wrapped bed sheet and the mattress 16 return to their original position synchronously.

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