Anti-bedsore nursing bed with independently controlled support points

Abstract

The anti-bedsore nursing bed disclosed in the present invention has independently controllable support points. The translation drive mechanism drives the selected thrust mechanism to translate to the bottom of any support component. When all the through holes are in a closed state, the lifting device drives the thrust member to rise, and uses the rotating members to respectively abut the bottoms of multiple support mechanisms and drive all the support mechanisms to rise, so that the skin of the human body lying on the mattress is massaged; when the through hole under at least one support mechanism is in an open state and the through holes under the remaining support mechanisms are in a closed state, the lifting device drives the thrust member to rise, and the rotating members at the remaining through hole positions respectively abut the bottoms of multiple support mechanisms and drive all the support mechanisms to rise, and the bottom of the support mechanism located at the through hole open state position is inserted into the through hole, and the support mechanism at this position does not move, so that it is at a different height from the pressure pads of other support mechanisms. The purpose of the non-acting pressure pad is to prevent the affected area from being contacted or pressed, so as to improve the use effect.

Description

Technical Field

[0001] The present invention relates to the technical field of nursing beds, in particular to an anti-bedsore nursing bed with independently controllable support points. Background Art

[0002] Bedsores, also known as pressure sores or pressure ulcers, are caused by prolonged pressure on localized skin, which impacts blood circulation and leads to nutrient deficiencies in the skin and subcutaneous tissue, resulting in damage, ulceration, and even necrosis. These sores are common, particularly in bedridden and frail patients. They often develop over bony prominences such as the sacrum, ischial tuberosity, femoral trochanter, lateral malleolus, and heel.

[0003] Pressure sores are caused by the concentration of body pressure on the skin in contact with the bed surface. Therefore, changing body position can help prevent pressure from concentrating on specific skin areas and distributing the pressure. However, chronic diseases such as stroke and diabetes, as well as movement disorders, make it difficult for bedridden patients and elderly people confined to their beds to move spontaneously, making it difficult to change body position. Furthermore, for these high-risk patients, changing their body position at regular intervals on a 24-hour basis with the assistance of a caregiver is burdensome.

[0004] Therefore, the market is in urgent need of a new type of nursing bed, whose pressing units can be controlled to move up and down locally or individually to avoid long-term contact between local skin tissue and the bed surface, so that the pressing units can be separated from the skin tissue without changing the body position, thereby preventing the occurrence of bedsores. However, multiple local pressing units need to be raised and lowered synchronously, which makes the design of the driving structure for driving the pressing units to rise and fall particularly important. Currently, the market usually adopts one lifting unit corresponding to one driving structure to form point-to-point control. Although this achieves the control purpose, the reliability is very poor, the failure rate is very high, and the structure is very complicated, which increases the weight of the entire nursing bed. Therefore, there is an urgent need for a driving structure that can drive multiple pressing units to move synchronously and has a simple, stable and easy-to-implement structure. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned technologies and to design an anti-bedsore nursing bed with independently controllable support points.

[0006] The anti-bedsore nursing bed with independently controllable support points designed by the present invention comprises a bed frame and a mattress installed in the bed frame, the mattress comprising multiple groups of support components, a selected thrust mechanism and a translation drive mechanism for driving the selected thrust mechanism to reciprocate along the length direction of the bed frame; the multiple groups of support components are arranged along the length direction of the bed frame and are arranged parallel to each other; the selected thrust mechanism is located below the multiple groups of support components;

[0007] Each support assembly includes a mounting frame fixed to the bed frame, and a plurality of support mechanisms movably mounted on the mounting frame, wherein the plurality of support mechanisms are arranged along the length direction of the mounting frame;

[0008] The selected thrust mechanism includes a lifting device, a thrust member mounted on the lifting device, and a plurality of selected devices mounted on the thrust member. The plurality of selected devices are arranged along the length direction of the thrust member. Each selected device includes a through hole located below each support mechanism, a rotating member capable of covering the through hole, and a rotation driving device for driving the rotating member to rotate and open or close the through hole. The through hole is formed on the thrust member and corresponds to the position of the support mechanism.

[0009] The translation drive mechanism drives the selected thrust mechanism to translate to the bottom of any support component. When all the through holes are in a closed state, the lifting device drives the thrust piece to rise, and uses the rotating parts to respectively contact the bottoms of multiple support mechanisms and drive all the support mechanisms to rise, so that the skin of a human body lying on the mattress is massaged; when the through holes under at least one support mechanism are in an open state and the through holes under the remaining support mechanisms are in a closed state, the lifting device drives the thrust piece to rise, and the rotating parts at the remaining through hole positions respectively contact the bottoms of multiple support mechanisms and drive the remaining support mechanisms to rise, and the bottom of the support mechanism located at the through hole open state position is inserted into the through hole, and the support mechanism at this position does not move.

[0010] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, the support mechanisms of two adjacent groups of support assemblies are staggered, and two through holes are provided under each support mechanism, namely the first through hole and the second through hole, so that the support mechanism of one support assembly in the two adjacent groups of staggered support assemblies corresponds to the position of the first through hole, and the support mechanism of the other support assembly corresponds to the position of the second through hole. Its structural arrangement enables the pressing units of the two adjacent groups of support assemblies to press and support different parts of the human body, thereby providing a better user experience.

[0011] The cam is provided with a support frame, and the cam is provided with a self-locking assembly, and the self-locking assembly includes a movable block slidably connected to the mounting frame, and a return spring is provided between the movable block and the mounting frame, and the mounting frame is provided with a locking hole between the movable block and the supporting shaft, and a ball is installed in the locking hole. The outer peripheral wall of the supporting shaft is provided with at least two limit grooves for inserting the ball along the sliding direction to limit the sliding of the supporting shaft, and the movable block is provided with a stopping portion and an avoiding portion, and the stopping portion is used to stop the ball in the limit groove to realize the insertion and locking of the ball and the limit groove, and the avoiding portion is used for the ball to be inserted to realize the unlocking and separation of the ball and the limit groove, and the position of the supporting shaft corresponds to the position of the through hole.

[0012] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, a self-lubricating guide bearing is provided between the mounting frame and the sleeve. The setting of the self-lubricating guide bearing reduces the friction coefficient when the sleeve slides, has better wear resistance, makes the sleeve slide smoother, and has a longer service life.

[0013] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, a buffer spring is provided between the sleeve and the support shaft, a spring seat is provided in the sleeve, one end of the buffer spring is against the top of the sleeve, and the other end is against the top of the spring seat, and the top of the support shaft is connected to the bottom end of the spring seat to avoid friction between the buffer spring and the support shaft and the sleeve, and to play a certain limiting and guiding role in the expansion and contraction of the buffer spring, thereby ensuring stable operation of the buffer spring.

[0014] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, a fixed seat is provided at the bottom of the sleeve, and a tension spring is provided between the fixed seat and the mounting frame and along the sliding direction of the sleeve. When the self-locking component is released, the sleeve and the support shaft naturally descend, and at the same time the tension spring pulls the sleeve and the support shaft to accelerate the descent of the sleeve and the support shaft to the extreme position.

[0015] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, the mounting frame includes a base, a first guide hole for guiding the sliding of the support shaft and a second guide hole for guiding the sliding of the moving block are opened in the base, the return spring is located in the second guide hole, one end of the return spring abuts against the inner wall of the second guide hole, and the other end abuts against the top of the moving block, the locking hole is located in the base and one end is connected to the first guide hole, so that the support shaft and the moving block are integrated on the base, which is convenient for loading and unloading and maintenance. The length of the locking hole is smaller than the diameter of the ball, reducing the distance the ball moves in the through hole, making it easier for the ball to be locked and released, and the diameter of the blocking portion (109) is larger than the avoidance portion (110).

[0016] According to the aforementioned anti-bedsore nursing bed with independently controllable support points, a pressing assembly is provided at the top of the sleeve. This pressing assembly comprises a universal connector fixed to the top of the sleeve, a support member movably connected to the universal connector, and a pressing pad mounted on the support member. This allows the pressing pad to rotate in all directions, improving the comfort of the pressing pad. The sleeves of each support mechanism are evenly distributed on the mounting frame. The support shafts, self-locking assemblies, and pressing assemblies all correspond to the sleeves one-to-one, facilitating individual or partial control of the pressing pads, thereby achieving an adjustable range of contact between the local pressing pad and the human body, achieving a more effective effect.

[0017] The anti-bedsore nursing bed with independently controllable support points described above also includes a lifting crossbar extending directly below each moving block and abutting the bottom end of the moving block. The lifting crossbar lifts the moving block to move it upward, thereby simultaneously locking or unlocking the self-locking components on multiple support mechanisms, achieving local control. The base is provided with a plurality of stoppers spaced along the length of the lifting crossbar. Each stopper has a lifting hole for the lifting crossbar to pass through. These stoppers not only position the lifting crossbar to ensure a horizontal arrangement, but also restrict the lifting path of the lifting crossbar, preventing significant deviation during horizontal up and down movement of the lifting crossbar.

[0018] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, the selected thrust mechanism further includes a fixed frame mounted on the translation drive mechanism and an unlocking mechanism, the lifting device is mounted on the fixed frame, the rotation drive device includes a rotating member and a first motor fixed to the thrust member, the rotating member is rotatably connected to the thrust member, the first motor drives the rotating member to rotate, the through hole is located below the rotating member, when the rotating member moves above the through hole, the through hole is blocked; when the rotating member moves to be offset from the through hole, the through hole is opened; when the through hole is blocked, as the selected device rises, the rotating member will reach the bottom end of the pressing unit and lift the pressing unit to achieve the lifting of the pressing unit, when the through hole is opened, the thrust member rises, and the bottom end of the pressing unit is just inserted into the through hole, forming a limit for the pressing unit, so that the bottom of the pressing unit is in a suspended state, thereby achieving the pressing unit being able to be positioned at different heights, and achieving partial separation of the nursing bed from the human body, so that the pressing unit is separated from the bedsore affected area and no longer compresses the bedsore affected area.

[0019] The cam is connected to the second end of the driving member and the control unit is connected to the control unit to control the movement of the cam, and the cam is connected to the control unit to control the movement of the cam.

[0020] According to the aforementioned anti-bedsore nursing bed with independently controllable support points, the lifting mechanism includes a lead screw pair and a third motor. The lead screw pairs are mounted on either side of a fixed frame, and a thrust member is mounted on a movable block of the lead screw pair. The third motor drives the two lead screw pairs to operate synchronously, thereby driving the thrust member to lift and lower. The lead screw pairs not only have extremely high transmission accuracy but also provide smooth transmission. The lead screws of the two lead screw pairs and the output ends of the third motor are each equipped with pulleys, and the three pulleys are connected by a belt. The pulley on the output end of the third motor drives the other two pulleys to rotate synchronously via the belt, achieving synchronous operation of the two lead screw pairs, thereby ensuring that the thrust member is raised and lowered in a horizontal position.

[0021] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, the rotating member includes a rotating part and a shielding part connected to the rotating part. The rotating part is installed on the thrust member through a wheel axle. The rotating part is provided with gear teeth. The first motor output shaft is provided with a gear that meshes with the gear teeth of the rotating part. The shielding part covers or opens the two through holes as the rotating part rotates, and the rotating member is driven to rotate by gear transmission. This rotation method has a simple structure, is stable and easy to implement.

[0022] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, the thrust member is provided with a limiter for limiting the rotation angle of the rotating member, so as to limit the rotation angle of the rotating member so that it can more accurately cover or open the through hole and avoid excessive rotation of the rotating member.

[0023] According to the above-mentioned anti-bedsore nursing bed with independently controllable support points, a metal gasket is provided between the thrust member, the rotating member and the limit member. The limit member is arranged on the metal gasket to prevent the thrust member from being worn due to long-term rotation of the rotating member. By replacing the metal gasket to ensure the horizontality of the thrust member, the selection device can finally accurately select the corresponding pressing unit.

[0024] The anti-bedsore nursing bed with independently controllable support points designed by the present invention has the following beneficial effects:

[0025] 1. A set of support components is selected by using a translation drive mechanism to drive a selected thrust mechanism to translate and lift each pressure pad on the support component. Therefore, the present invention has only one mechanism to drive the pressure pad to lift, which greatly reduces the weight of the entire nursing bed.

[0026] 2. The unlocking mechanism of the selected thrust mechanism can unlock the self-locking component to control the descent of the pressure pad of the support mechanism. The descent motion of the pressure pad is controlled to prevent the human skin from being compressed for a long time and developing bedsores.

[0027] 3. When each pressure pad is lifted, the through hole below the support mechanism can be opened, so that after the thrust piece is lifted, the bottom of the support mechanism at the position where the through hole is opened is still in a suspended state and is at a different height from the pressure pads of other support mechanisms. In addition, the pressure pads of other support mechanisms are lifted to push the human skin, and the purpose of the non-action pressure pads is to prevent pressure on parts of the human body with bedsores, wounds, or parts that are not suitable for pressing from being pressed, so as to improve the use effect.

[0028] 4. The sleeve in each supporting mechanism rises by the jacking of the supporting shaft and falls by its own gravity, thereby realizing the up and down movement of the sleeve. The bottom end of the sleeve is connected to the supporting shaft, and a buffer spring is provided between the sleeve and the supporting shaft. The buffer spring enables the pressure pad to have an up and down buffering function to reduce the pressure of the pressure pad on the skin; when the supporting shaft drives the sleeve to move up and down, the self-locking component can lock the supporting shaft at different upper and lower positions. When multiple such support structures are distributed on the nursing bed, individual or partial support structures can be controlled to make the pressure pads on the nursing bed at different heights, thereby avoiding long-term contact between the human body and the pressure pad. Therefore, even if the patient does not change his or her body position or does not seek help from a caregiver, he or she can effectively prevent the occurrence of bedsores, which is very flexible and free. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the structure in which the thrust mechanism is selected to be located under the mattress;

[0030] Figure 2 This is a schematic diagram of the overall structure of the nursing bed;

[0031] Figure 3 It is the overall structural diagram of the supporting mechanism;

[0032] Figure 4 It is an overall cross-sectional view of the support mechanism;

[0033] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 It is a structural diagram when multiple support mechanisms are combined;

[0035] Figure 7 It is a top view of the overall structure of the selected thrust mechanism;

[0036] Figure 8 It is the selected mechanism structure diagram of the selected thrust mechanism;

[0037] Figure 9 It is a bottom view of the selected thrust mechanism;

[0038] Figure 10 It is the rear view of the selected thrust mechanism;

[0039] Figure 11It is a structural diagram when multiple support structures are combined;

[0040] Figure 12 It is a side view of the holistic nursing bed;

[0041] Figure 13 1 is a schematic diagram of the three-dimensional structure of a nursing bed (I);

[0042] Figure 14 1. It is a schematic diagram of the three-dimensional structure of the nursing bed (II);

[0043] Figure 15 1. It is a schematic diagram of the three-dimensional structure of the nursing bed (3);

[0044] Figure 16 1. It is a schematic diagram of the three-dimensional structure of a nursing bed (IV);

[0045] Figure 17 1. It is a schematic diagram of the three-dimensional structure of a nursing bed (V);

[0046] Figure 18 1. It is a schematic diagram of the three-dimensional structure of a nursing bed (six).

[0047] In the picture:

[0048] 1. Bed frame; 2. Mattress; 21. Support assembly; 22. Support mechanism; 3. Translation drive mechanism; 31. Double-head motor; 32. Reducer; 33. Active synchronous pulley; 34. Driven synchronous pulley; 35. Synchronous drive belt; 36. Linear guide; 30. Synchronous belt drive group; 38. Drive shaft; 4. Selected thrust mechanism; 41. Selected device; 42. Lifting device;

[0049] 100. Mounting frame; 101. Sleeve; 102. Support shaft; 103. Buffer spring; 104. Moving block; 105. Return spring; 106. Through hole; 107. Ball bearing; 108. Limiting groove; 109. Stopper; 110. Avoidance portion; 111. Self-lubricating guide bearing; 112. Spring seat; 113. Fixed seat; 114. Tension spring; 115. Base; 116. First guide hole; 117. Second guide hole; 118. Universal connector; 119. Support member; 120. Press pad; 121. Lifting crossbar; 122. Limiting member; 123. Lifting hole; 124. Protective cover; 125. Boosting wheel;

[0050] 200, fixed frame; 201, rotating member; 2011, rotating part; 2012, shielding part; 2013, gear teeth; 202, first motor; 203, positioning hole; 204, rotating shaft; 205, second motor; 206, swinging member; 207, eccentric wheel; 208, first rocker; 209, second rocker; 210, screw pair; 211, third motor; 212, pulley; 213, belt; 214, bearing seat; 215, gear; 216, limit member; 217, metal gasket; 218, thrust member. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0052] Example 1:

[0053] like Figure 1 and Figure 2 As shown, the anti-bedsore nursing bed with independently controllable support points described in this embodiment includes a bed frame 1 and a mattress 2 installed in the bed frame 1, the mattress 2 includes multiple groups of support components 21, and the bed frame 1 is provided with a selected thrust mechanism 4 and a translation drive mechanism 3 that drives the selected thrust mechanism 4 to reciprocate and translate along the length direction of the bed frame 1; the multiple groups of support components 21 are arranged along the length direction of the bed frame 1 and are arranged parallel to each other; the selected thrust mechanism 4 is located below the multiple groups of support components 21; the pressing units on the multiple groups of support components 21 are arranged to form a mattress 2 that contacts the human body, and the selected thrust mechanism 4 drives the pressing units to perform lifting actions, thereby realizing the positioning of the pressing units to different heights, that is, realizing the up and down switching of the local position of the mattress 2, so that the bedsore-affected area does not need to be compressed and the human skin is also prevented from being compressed for a long time.

[0054] Specifically, each support assembly 21 includes a mounting frame 100 fixed to the bed frame 1, and a plurality of support mechanisms 22 movably mounted on the mounting frame 100, and the plurality of support mechanisms 22 are arranged along the length direction of the mounting frame; a hole is opened on the mounting frame 100, and a sleeve 101 is placed vertically in the hole and can slide axially along the hole. A pressing pad 120 is provided on the top of the sleeve 101, and a supporting shaft 102 is connected to the bottom. The supporting shaft 102 is sleeved in the sleeve 101 and can slide axially along the sleeve 101. A buffer spring 103 is provided between the sleeve 101 and the supporting shaft 102, and the buffer spring 103 is located inside the sleeve 101 One end of the spring seat 112 abuts against the top of the sleeve 101, and the other end abuts against the top of the support shaft 102. A spring seat 112 is provided inside the sleeve 101 between the sleeve 101 and the support shaft 102. The spring seat 112 can slide axially inside the sleeve 101. The top of the spring seat 112 abuts against the buffer spring 103, and the bottom end is connected to the support shaft 102. The support shaft 102 is driven to rise, and the support shaft 102 drives the spring seat 112 to rise. The spring seat 112 drives the buffer spring 103 to compress, and the buffer spring 103 drives the sleeve 101 to rise. The sleeve 101 then drives the pressing pad 120 to rise, realizing the lifting action of the pressing pad 120. A connecting hole is opened at the top of the support shaft 102, and a fastener is fixed in the connecting hole. The spring seat 112 and the top of the support shaft 102 are connected by the fastener to realize the detachable connection between the support shaft 102 and the sleeve 101.

[0055] The mounting frame 100 is provided with a self-locking component, which includes a moving block 104. The moving block 104 is slidably connected to the mounting frame 100. The moving block 104 is similar to a small shaft structure, which is installed on the mounting frame 100 near the bottom of the supporting shaft 102. A hole is opened on the mounting frame 100, and the moving block 104 is installed in the hole. A return spring 105 is provided between the moving block 104 and the mounting frame 100. One end of the return spring 105 rests on the inner wall of the hole, and the other end rests on the bottom of the moving block 104, so that the moving block 104 can perform reciprocating lifting and lowering movements along the hole, with the top of the moving block 104 facing downward and extending out of the hole.

[0056] like Figure 3-Figure 6As shown, the mounting frame 100 is provided with a locking hole 106 between the moving block 104 and the supporting shaft 102, and the two ends of the locking hole 106 are connected to the holes where the moving block 104 and the supporting shaft 102 are located, and a movable ball 107 is installed in the locking hole 106, wherein the length of the locking hole 106 is smaller than the diameter of the ball 107, and the outer peripheral wall of the supporting shaft 102 is provided with a limiting groove 108 at the locking hole 106, and the limiting groove 108 can be inserted into the ball 107, thereby locking the supporting shaft 102 and limiting the lifting of the supporting shaft 102, and the moving block 104 is located at the other end of the locking hole 106, and the moving block 104 is provided with a stopping portion 109 and an avoiding portion 110, which are arranged on the outer wall of the moving block 104 along the sliding direction of the moving block 104. In this embodiment, the outer periphery of the moving block 104 protrudes outward, and its protruding part forms the stopping portion 109, and its outer periphery is concave inward, and its inner concave portion The avoidance portion 110 is formed, and as the moving block 104 rises and falls, when the moving block 104 moves to the stopper 109 to align with the ball 107, the stopper 109 slowly pushes the ball 107 toward the support shaft 102, and when one end or part of the ball 107 is inserted into the limit groove 108 of the support shaft 102, it forms a card position with the limit groove 108, thereby locking the support shaft 102; when the moving block 104 moves to the avoidance portion 110 to align with the ball 107, the support shaft 102 is locked. Driven by external force, the bearing shaft 102 is lifted slightly, causing looseness between the limit groove 108 and the ball 107 of the supporting shaft 102. The supporting shaft 102 continues to lift, driving the limit groove 108 and the ball 107 to be offset. The outer peripheral wall of the supporting shaft 102 pushes the ball 107 toward the moving block 104, and the ball 107 retreats to the avoidance portion 110. Finally, the ball 107 separates from the limit groove 108, thereby unlocking the supporting shaft 102.

[0057] In this embodiment, there are two limit slots 108 , which are arranged up and down along the sliding direction, so that the support shaft 102 can be locked in two levels, that is, the pressing pad 120 can be locked both after rising and after falling.

[0058] Preferably, the limiting groove 108 is in an arc shape, so that when the supporting shaft 102 is lifted, the balls 107 slowly separate along the limiting groove 108 and the balls 107 will not be stuck in the limiting groove 108.

[0059] In this embodiment, the mounting frame 100 includes a base 115, which is detachably connected to the mounting frame 100. A first guide hole 116 and a second guide hole 117 are formed in the base 115. The lock hole 106 is located in the base 115 and one end is connected to the first guide hole 116. The top of the support shaft 102 is sleeved with the sleeve 101, and the bottom passes through the first guide hole 116 and slides up and down along the first guide hole 116. The moving block 104 is installed from bottom to top in the second guide hole 117. The return spring 105 is located in the second guide hole 117, and one end of the return spring 105 is against the inner wall of the second guide hole 117. , the other end is against the top of the moving block 104, and the top of the moving block 104 extends out of the bottom end of the second guide hole 117, so that the external force drives the moving block 104, so that the moving block 104 performs a lifting action in the second guide hole 117. When the external force is removed, the moving block 104 is always in a natural descending position under the action of the return spring 105. When the moving block 104 is in the descending position, the stopping portion 109 is opposite to one end of the lock hole 106, so that the stopping portion 109 constrains the ball 107 in the lock hole 106. Only when the external force drives the moving block 104 to move, the stopping portion 109 will be staggered and separated from the lock hole 106.

[0060] Preferably, a self-lubricating guide bearing 111 is provided between the mounting frame 100 and the sleeve 101 to ensure that the sleeve 101 slides smoothly without wear.

[0061] Preferably, a fixing seat 113 is detachably installed at the bottom of the sleeve 101, and the fixing seat 113 moves with the sleeve 101. A tension spring 114 is provided between the fixing seat 113 and the mounting frame 100 and along the sliding direction of the sleeve 101. There are two tension springs 114, which are located on both sides of the fixing seat 113 respectively.

[0062] Preferably, a pressing assembly is provided at the top of the sleeve 101, and the pressing assembly includes a universal connector 118 and a support member 119. The fixed end of the universal connector 118 is fixed to the top of the sleeve 101, and a spherical groove is provided in the center of the support member 119. The spherical movable end of the universal connector 118 is adapted to the spherical groove, so that the support member 119 can rotate freely along the top of the sleeve 101. The support member 119 has a number of holes distributed in a ring with the spherical groove as the center, and a pressing pad 120 is installed in the hole to form a complete pressing head.

[0063] Preferably, if Figure 4 As shown, when there are multiple sleeves 101, they are usually evenly distributed on the mounting frame 100. The supporting shafts 102, self-locking components and pressing components all correspond to the sleeves 101 one by one, forming a free combination of multiple support mechanisms 22.

[0064] In this embodiment, it also includes a lifting cross bar 121, which is placed horizontally below the moving block 104. When there are multiple supporting mechanisms 22, the lifting cross bar 121 extends to the bottom of each moving block 104 and abuts against the bottom end of the moving block 104. The moving block 104 is lifted by the lifting cross bar 121 to achieve synchronous upward movement of all moving blocks 104.

[0065] Preferably, the base 115 is provided with a plurality of limiting members 122 at intervals along the length direction of the lifting cross bar 121 , and each limiting member 122 is provided with a lifting hole 123 for the lifting cross bar 121 to pass through.

[0066] Preferably, the lifting crossbar 121 is a straight rod, and in this case, multiple support mechanisms 22 are arranged in a horizontal straight line, that is, the sleeves 101 are distributed in a straight line on the mounting frame 100, each sleeve 101 corresponds to a support shaft 102 and a self-locking component, and the lifting crossbar 121 is placed horizontally at the bottom of the moving block 104.

[0067] In this embodiment, a protective cover 124 is provided on the outside of the sleeve 101 to prevent dust and protect the outer wall of the sleeve 101 .

[0068] like Figure 7-11 As shown, specifically, the selected thrust mechanism 4 includes a lifting device 42, a thrust piece 218 installed on the lifting device 42, and a plurality of selected devices 41 installed on the thrust piece 218. The plurality of selected devices 41 are arranged along the length direction of the thrust piece 218. Each selected device 41 includes a through hole located below each support mechanism 22, a rotating member 201 that can cover the through hole, and a rotation driving device that drives the rotating member to rotate and open or close the through hole 203. The through hole is formed on the thrust piece 218. Corresponding to the position of the support mechanism 22; the selected thrust mechanism 4 also includes a fixed frame 200 mounted on the translation drive mechanism 3, and an unlocking mechanism, a lifting device 42 is mounted on the fixed frame, and the fixed frame 200 is driven by the transmission mechanism to perform lifting and lowering movements, a selection device 41 is provided on the thrust member 218, and the rotation drive device includes a rotating member 201, a first motor 202 and two through holes 203, the rotating member 201 is rotatably connected to the thrust member 218, and the first motor 202 drives the rotating member 201 to rotate, such as Figure 2 As shown, through hole 203 is provided in thrust member 218 and is located below rotating member 201. By rotating member 201 to different angles, through hole 203 can be covered or opened. When through hole 203 is covered, as thrust member 200 rises, rotating member 201 will reach the bottom end of the support shaft and lift the support shaft, causing the support shaft to rise. When through hole 203 is opened, thrust member 200 rises, and the bottom end of the support shaft is inserted into through hole 203, leaving the bottom of the support shaft suspended. The number of selection devices 41 is linearly distributed, and can simultaneously correspond to multiple pressing units, forming a local selection.

[0069] like Figure 7 and Figure 10 As shown, the unlocking mechanism includes a rotating shaft 204, a second motor 205 and a swinging member 206. The rotating shaft 204 is connected to the fixed frame 200 and is driven by the second motor 205 to rotate axially. One end of the swinging member 206 is connected to the shaft body of the rotating shaft 204, and the other end extends to the top of the rotating member 201 and abuts against the shaft of the lifting crossbar 121. The swinging member (206) is correspondingly located below the lifting crossbar 121. The swinging member 206 is driven by the rotating shaft 204 and rotates around the shaft body of the rotating shaft 204. Since the shaft of the lifting crossbar 121 is cylindrical, the top of the swinging member 206 is horizontal at this time, and the horizontal surface abuts against the bottom of the lifting crossbar 121. When the swinging member 206 rotates, its horizontal surface rotates accordingly and will lift the lifting crossbar 121 a short distance. The lifting crossbar then lifts the moving block, so that the self-locking component unlocks the support shaft; the swinging member 206 has a curved structure.

[0070] Further optimization is that there are multiple swing members 206 distributed along the axial direction of the rotation shaft, so that the swing members can synchronously push the pressing unit.

[0071] In addition, a booster wheel 125 is provided on the position of the lifting cross bar corresponding to the swinging member 206. The swinging member 206 is tightly against the booster wheel 125. The swinging member 206 directly applies force to the booster wheel 125, indirectly lifting the lifting cross bar 121, avoiding direct contact between the swinging member 206 and the lifting cross bar, and reducing the risk of bending of the lifting cross bar.

[0072] In this embodiment, an eccentric rocker mechanism is provided between the second motor 205 and the rotating shaft 204. The eccentric rocker mechanism includes an eccentric 207, a first rocker 208 and a second rocker 209. The eccentric 207 is installed on the output shaft of the second motor 205. The output shaft of the second motor 205 drives the eccentric 207 to rotate. One end of the first rocker 208 is hinged to the protruding part of the eccentric 207, and the other end is hinged to one end of the second rocker 209. The other end of the second rocker 209 is fixed to the rotating shaft 204. The second motor 205 drives the eccentric 207 to rotate, and the eccentric 207 drives the first rocker 208 and the second rocker 209 to work together. The second rocker 209 drives the rotating shaft 204 to rotate, and the rotating shaft 204 then drives the swinging member 206 to swing.

[0073] Preferably, the bottom of the swing member 206 is similar to a hoop structure, which is mounted on the rotating shaft 204. The top of the swing member 206 extends to below the lifting cross bar, and a horizontal surface for lifting the lifting cross bar is provided on the top.

[0074] Preferably, there are multiple swinging members 206, which are distributed axially or evenly and equidistantly along the rotating shaft 204. There are also multiple booster wheels 125 on the lifting cross bar, and they correspond one-to-one to the swinging members 206, so that multiple swinging members 206 can push the lifting cross bar at the same time, so that the lifting cross bar can lift multiple moving blocks evenly and stably at the same time.

[0075] Preferably, the unlocking mechanism also includes a bearing seat 214, which is fixed on the fixing frame 200. The bearing seat 214 is sleeved on the rotating shaft 204 to support the rotation of the rotating shaft 204. Several bearing seats 214 correspond one-to-one to the swinging member 206 and rest against one side of the swinging member 206, thereby strengthening the bottom strength of the swinging member 206 and preventing the swinging member 206 from bending and deforming.

[0076] Furthermore, the rotating member 201 includes a rotating portion 2011 and a shielding portion 2012 connected to the rotating portion 2011. The rotating portion 2011 is mounted on the thrust member 218 via a wheel shaft. The rotating portion 2011 is provided with gear teeth 2013, that is, the gear teeth 2013 are arranged along the edge of the rotating portion 2011. The output shaft of the first motor 202 is provided with a gear 215 that meshes with the gear teeth 2013 of the rotating portion 2011. The first motor 202 drives the gear 215 to rotate, and the gear 215 then drives the rotating member 201 to rotate. The shielding portion 2012 rotates with the rotating portion 2011 to above the through hole 203, shielding the through hole 203. The shielding portion 2012 rotates to be offset from the through hole 203, so that the through hole 203 is open. At this time, the supporting shaft is inserted into the through hole 203 and cannot be lifted. In this embodiment, the edge of the rotating portion 2011 is divided into two sections, one section is used to distribute the gear teeth 2013, and the other section is provided with the shielding portion 2012. The shielding portion 2012 is integrated with the rotating portion 2011 or the shielding portion 2012 extends from the edge of the rotating portion 2011.

[0077] Preferably, a limit member 216 is provided on the thrust member 218 for limiting the rotation angle of the rotating member 201, so that the rotating member 201 rotates within the range of the shielded or open through hole 203 to prevent it from excessive rotation. In this embodiment, the limit member 216 is a bolt-like structure fixed on both sides of the rotating member 201.

[0078] Preferably, a metal gasket 217 is provided between the thrust piece 218 and the rotating piece 201 and the limiting piece 216. The metal gasket 217 usually corresponds one-to-one to the selected device 41. The metal gasket 217 is fitted and fixed on the thrust piece 218. The rotating piece 201 and the limiting piece 216 are fixed on the thrust piece 218 through the metal gasket 217, so that the rotating piece 201 avoids scratching the surface of the thrust piece 218.

[0079] In this embodiment, the lifting device 42 includes a screw pair 210 and a third motor 211. The screw pair 210 includes a screw and a nut slidably connected to the screw. The screws are located on both sides of the fixed frame 200. The nuts are connected to the thrust piece 218. As the screws rotate, the nuts drive the thrust piece 218 to move up and down. The output ends of the two screws and the third motor 211 are both provided with pulleys 212. Figure 9 As shown, the three pulleys 212 are connected by a belt 213. The pulley 212 on the output end of the third motor 211 drives the other two pulleys 212 to rotate synchronously through the belt 213, so that the two screws can rotate synchronously, thereby realizing the smooth lifting and lowering movement of the thrust piece 218.

[0080] like Figure 2 As shown, in this embodiment, the support mechanisms 22 of two adjacent groups of support assemblies 21 are staggered, and two through holes are provided under each support mechanism 22, which are the first through hole and the second through hole respectively, so that the support mechanism 22 of one support assembly 21 in the two adjacent groups of staggered support assemblies 21 corresponds to the position of the first through hole, and the support mechanism 22 of the other support assembly 21 corresponds to the position of the second through hole. The number of through holes can be set according to actual conditions.

[0081] In this embodiment, Figures 12-18 As shown, the bed frame 1 is composed of two short side panels and two long side panels. The translation drive mechanism 3 includes two sets of synchronous belt transmission groups 30, two speed reducers 32, a double-headed motor 31 and two linear guide rails 36. The two sets of synchronous belt transmission groups 30 are respectively installed on the inner walls of the two long side panels of the bed frame 1, and the two linear guide rails 36 are also respectively fixed to the inner walls of the two long side panels. The synchronous belt transmission group 30 includes a driving synchronous pulley 33 and two driven synchronous pulleys 34. The two driven synchronous pulleys 34 are respectively rotatably installed at the two ends of the long side panels through rotating shafts, and the driving synchronous pulley 33 is rotatably installed at one end of the long side panel. The two speed reducers 32 are arranged opposite to each other and are respectively fixed to the inner walls of the two long side panels. A double-headed motor 31 is installed on the rotating shaft of a speed reducer 32. The rotating shaft of a reducer 32 is connected to the rotating shaft of the double-headed motor 31 through a transmission shaft 38. The driving synchronous pulley 33 and the two driven synchronous pulleys 34 are tensioned with a synchronous transmission belt 35. The fixed frame 200 is fixed on the slider of the linear guide 36 and the synchronous transmission belt 35. The reciprocating movement of the synchronous transmission belt 35 is used to drive the reciprocating translation of the selected thrust mechanism 44. The movement of the synchronous transmission belt 35 is realized by the double-headed motor 31 driving the reducer 32, the driving synchronous pulley 33, and the two driven synchronous pulleys 34. The synchronous transmission belt and the linear guide are arranged parallel to each other; or the two sets of synchronous belt drive groups can be replaced by a screw slide, and the fixed frame is connected to the slider of the screw slide. The screw slide is an existing well-known technology, so it will not be described in detail here.

[0082] The working principle of the nursing bed:

[0083] When there are two limiting grooves 108 on the supporting shaft 102, the moving block 104 is acted upon by the reset spring 105 and is in a descending state. At this time, the stopping portion 109 of the moving block 104 is facing one end of the locking hole 106 of the base 115 and is against the ball 107, constraining the ball 107 in the locking hole 106. The ball 107 is partially inserted into the limiting groove 108 on the supporting shaft 102 toward the supporting shaft 102. At this time, the supporting shaft 102 is in a locked state, and the ball is generally locked in any one of the limiting grooves 108.

[0084] The translation drive mechanism 3 drives the selected thrust mechanism 4 to translate to the bottom of any support component 21, and the swing member 206 swings to lift the lifting cross bar 121, so that the moving block 104 is lifted under the drive of the lifting cross bar 121, and the moving block 104 moves up, and the stopping portion 109 of the moving block 104 is staggered with the lock hole 106, and the avoidance portion 110 of the moving block 104 is opposite to the lock hole 106, so that the moving block 104 no longer constrains the ball 107. At this time, the external force drives the supporting shaft 102 to lift, and looseness occurs between the ball 107 and the limiting groove 108. The limiting groove 108 gradually staggers with the ball 107, and the ball 107 moves toward the avoidance groove until the ball 107 is completely staggered with the limiting groove 108, and the supporting shaft 102 is in the unlocked state, and then the supporting shafts 102, sleeves 101 and pressing pads of all supporting mechanisms are unlocked. 120 all move downward under the action of the tension spring. At this time, all rotating parts 201 rotate at the same time to cover all through holes 203. The lifting device 42 drives the thrust member 218 to rise according to the preset lifting force, and uses each rotating part to respectively resist the bottom of the support shaft of multiple support mechanisms 22 and drive all support shafts 102 to rise, so that the pressing pad 120 on the top of the sleeve 101 is lifted, and the human skin lying on the mattress 2 is pressed and massaged by the pressing pad 120, and a limiting groove 108 corresponds to the position of the lock hole 106, and then the swing member 206 swings back to its original position, and the moving block 104 descends under the action of the reset spring 105 and resists the ball 107, so that the inner side of the ball 107 is limited in the limiting groove 108, and the lifting device 42 drives the thrust member 218 and the rotating member 201 to move downward, canceling the action on the support shaft 102.

[0085] The translation drive mechanism 3 drives the selected thrust mechanism 4 to translate to the bottom of any support assembly 21, that is, above the position of the support assembly 21, where the patient has a non-pressable part, a bedsore or a wound. The swing member 206 swings and lifts the lifting cross bar 121, so that the moving block 104 is lifted under the drive of the lifting cross bar 121. The moving block 104 moves upward, and the stop portion 109 of the moving block 104 is staggered with the lock hole 106. The avoidance portion 110 of the moving block 104 is opposite to the lock hole 106, so that the moving block 104 cannot Then the ball 107 is constrained. At this time, the external force drives the support shaft 102 to lift up, and looseness occurs between the ball 107 and the limiting groove 108. The limiting groove 108 gradually misaligns with the ball 107, and the ball 107 moves toward the avoidance groove until the ball 107 and the limiting groove 108 are completely offset. The support shaft 102 is in the unlocked state, and then the support shaft 102, sleeve and pressing pad of all the support mechanisms 22 move down under the action of the tension spring. At this time, each rotating member 201 partially rotates to cover the through hole 203 at a part of the position, so that At least one through hole under the support mechanism 22 is in an open state, and the through holes under the remaining support mechanisms 22 are in a closed state. The lifting device 42 drives the thrust member 218 to rise according to the preset lifting force, and the rotating members 201 at the positions of the remaining through holes 203 respectively contact the bottom of the support shafts of multiple support mechanisms 22 and drive all the remaining support mechanisms 22 to rise, so that the top of the sleeve of the support mechanism 22 in the lifting position presses the pad 120 to lift, and the skin of the human body lying on the mattress 2 is pressed and massaged by the pressing pad 120 The bottom of the support mechanism 22 located in the open state of the through hole is inserted into the through hole, and the support mechanism 22 at this position does not move, so that the pressure pads on the support assembly 21 are at different heights, and the limit grooves on the support shaft at the remaining lifting position correspond to the position of the lock hole. Then the swing member swings back to its original position, and the moving block 104 descends under the action of the reset spring and contacts the ball, so that the inner side of the ball is limited in the limit groove, and the lifting device 42 drives the thrust member 218 and the rotating member to move downward, canceling the action on the support shaft.

[0086] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. An anti-bedsore nursing bed with independently controllable support points, comprising a bed frame (1) and a mattress (2) installed in the bed frame (1), characterized in that: The mattress (2) includes a plurality of support components (21), a selected thrust mechanism (4) and a translation drive mechanism (3) for driving the selected thrust mechanism (4) to reciprocate and translate along the length direction of the bed frame (1) are provided in the bed frame (1); the plurality of support components (21) are arranged along the length direction of the bed frame (1) and are arranged parallel to each other; the selected thrust mechanism (4) is located below the plurality of support components (21); Each support assembly (21) includes a mounting frame (100) fixed on the bed frame (1), and a plurality of support mechanisms (22) movably mounted on the mounting frame (100), wherein the plurality of support mechanisms (22) are arranged along the length direction of the mounting frame (100); The selected thrust mechanism (4) includes a lifting device (42), a thrust piece (218) mounted on the lifting device (42), and a plurality of selected devices (41) mounted on the thrust piece (218), wherein the plurality of selected devices (41) are arranged along the length direction of the thrust piece (218), and each selected device (41) includes a through hole located below each support mechanism (22), a rotating member (201) capable of covering the through hole (203), and a rotation driving device for driving the rotating member (201) to rotate and open or close the through hole (203), wherein the through hole (203) is formed on the thrust piece (218), and the through hole (203) corresponds to the position of the support mechanism (22); The translation drive mechanism (3) drives the selected thrust mechanism (4) to translate to the bottom of any support assembly (21). When all the through holes (203) are in a closed state, the lifting device (42) drives the thrust member (218) to rise, and uses the rotating members (201) to respectively contact the bottoms of multiple support mechanisms (22) and drive all the support mechanisms (22) to rise, so that the skin of a person lying on the mattress (2) is pressed; when the through holes (203) below at least one support mechanism (22) are in an open state, the remaining When the through hole (203) below the lower support mechanism (22) is in a closed state, the lifting device (42) drives the thrust member (218) to rise, and the rotating members (201) at the positions of the remaining through holes (203) respectively contact the bottoms of the plurality of support mechanisms (22) and drive the remaining support mechanisms (22) to rise, and the bottoms of the support mechanisms (22) at the positions where the through holes (203) are in an open state are inserted into the through holes (203), and the support mechanisms (22) at the positions where the through holes (203) are in an open state do not move.

2. The anti-bedsore nursing bed with independently controllable support points according to claim 1, characterized in that: The support mechanisms (22) of two adjacent groups of support assemblies (21) are arranged in a staggered manner, and two through holes (203) are provided below each support mechanism (22), which are respectively a first through hole and a second through hole, so that the support mechanism (22) of one support assembly (21) of the two adjacent groups of staggered support assemblies (21) corresponds to the position of the first through hole, and the support mechanism (22) of the other support assembly (21) corresponds to the position of the second through hole.

3. The anti-bedsore nursing bed with independently controllable support points according to claim 1 or 2, characterized in that: Each support mechanism (22) includes a sleeve (101) slidably connected to the mounting frame (100), the sleeve (101) is axially slidably connected to the support shaft (102), the mounting frame (100) is provided with a self-locking component, the self-locking component includes a moving block (104) slidably connected to the mounting frame (100), a return spring (105) is provided between the moving block (104) and the mounting frame (100), the mounting frame (100) is provided with a locking hole (106) between the moving block (104) and the support shaft (102), a ball (107) is installed in the locking hole (106), and the support The outer peripheral wall of the bearing shaft (102) is provided with at least two limiting grooves (108) for inserting balls (107) along the sliding direction to limit the sliding of the supporting shaft (102); the moving block (104) is provided with a stopping portion (109) and an avoiding portion (110); the stopping portion (109) is used to stop the balls (107) in the limiting grooves (108) to achieve the insertion and locking of the balls (107) and the limiting grooves (108); the avoiding portion (110) is used to allow the balls (107) to be inserted to achieve the unlocking and separation of the balls (107) and the limiting grooves (108); the position of the supporting shaft (102) corresponds to the position of the through hole.

4. The anti-bedsore nursing bed with independently controllable support points according to claim 3, characterized in that: A self-lubricating guide bearing (111) is provided between the mounting frame (100) and the sleeve (101), a buffer spring (103) is provided between the sleeve (101) and the support shaft (102), a spring seat (112) is provided in the sleeve (101), one end of the buffer spring (103) abuts against the top of the sleeve (101), and the other end abuts against the top of the spring seat (112), and the top of the support shaft (102) is connected to the bottom of the spring seat (112); A fixing seat (113) is provided at the bottom of the sleeve (101), and a tension spring (114) is provided between the fixing seat (113) and the mounting frame (100) and along the sliding direction of the sleeve (101).

5. The anti-bedsore nursing bed with independently controllable support points according to claim 3, characterized in that: The mounting frame (100) includes a base (115), a first guide hole (116) for guiding the sliding of the support shaft (102) and a second guide hole (117) for guiding the sliding of the moving block (104) are opened in the base (115), the return spring (105) is located in the second guide hole (117), one end of the return spring (105) abuts against the inner wall of the second guide hole (117), and the other end abuts against the top of the moving block (104), the locking hole (106) is located in the base (115) and one end is connected to the first guide hole (116); the length of the locking hole (106) is smaller than the diameter of the ball (107), and the diameter of the stop portion (109) is larger than the diameter of the avoidance portion (110).

6. The anti-bedsore nursing bed with independently controllable support points according to claim 3, characterized in that: A pressing assembly is provided at the top of the sleeve (101), and the pressing assembly includes a universal connector (118) fixed to the top of the sleeve (101), a support member (119) movably connected to the universal connector (118), and a pressing pad (120) installed on the support member (119); the sleeves (101) of each supporting mechanism (22) are evenly distributed on the mounting frame (100), and the supporting shaft (102), the self-locking assembly and the pressing assembly all correspond to the sleeves (101) one by one.

7. The anti-bedsore nursing bed with independently controllable support points according to claim 5, characterized in that: The invention also includes a lifting crossbar (121), wherein the lifting crossbar (121) extends to the bottom of each moving block (104) and contacts the bottom end of the moving block (104). The moving block (104) is lifted by the lifting crossbar (121) to achieve upward movement of the moving block (104); the base (115) is provided with a plurality of limiting members (122) at intervals along the length direction of the lifting crossbar (121), and each limiting member (122) is provided with a lifting hole (123) for the lifting crossbar (121) to penetrate.

8. The anti-bedsore nursing bed with independently controllable support points according to claim 7, characterized in that: The selected thrust mechanism (4) further includes a fixed frame mounted on the translation drive mechanism (3) and an unlocking mechanism, the lifting device (42) is mounted on the fixed frame, the rotation drive device includes a rotating member (201) and a first motor (202) fixed on the thrust member (218), the rotating member (201) is rotatably connected to the thrust member (218), the first motor (202) drives the rotating member (201) to rotate, the through hole (203) is located below the rotating member (201), when the rotating member (201) moves to above the through hole (203), the through hole (203) is shielded; when the rotating member (201) moves to be offset from the through hole (203), the through hole (203) is opened; The unlocking mechanism comprises a rotating shaft (204), a second motor (205) and a swinging member (206), wherein the rotating shaft (204) is connected to the fixing frame (200) and driven by the second motor (205) to rotate axially, one end of the swinging member (206) is connected to the shaft body of the rotating shaft (204), and the other end extends to the top of the rotating member (201); an eccentric wheel rocker mechanism is provided between the second motor (205) and the rotating shaft (204), and the eccentric wheel rocker mechanism comprises an eccentric wheel (207), a first rocker (208) and a second rocker (209), wherein the eccentric wheel (207) is connected to the output shaft of the second motor (205), one end of the first rocker (208) is connected to the eccentric wheel (207), and the other end is hinged to one end of the second rocker (209), and the other end of the second rocker (209) is connected to the rotating shaft (204). The unlocking mechanism further includes a bearing seat (214) for assisting the rotation of the supporting shaft (204), and a plurality of bearing seats (214) correspond to the swing members (206) one by one and are arranged against the swing members (206), and the swing members (206) are correspondingly located below the lifting crossbar.

9. The anti-bedsore nursing bed with independently controllable support points according to claim 8, characterized in that: The lifting device (42) includes a screw pair (210) and a third motor (211), wherein the screw pairs (210) are respectively mounted on both sides of the fixed frame (200), and the thrust piece (218) is mounted on the movable block of the screw pair (210). The third motor (211) drives the two screw pairs (210) to operate synchronously to drive the thrust piece (218) to perform lifting and lowering movements. The screws of the two screw pairs (210) and the output ends of the third motor (211) are both provided with pulleys (212), and the three pulleys (212) are connected by a belt (213). The pulley (212) on the output end of the third motor (211) drives the other two pulleys (212) to rotate synchronously through the belt (213).

10. The anti-bedsore nursing bed with independently controllable support points according to claim 8, characterized in that: The rotating member (201) comprises a rotating portion (2011) and a shielding portion (2012) connected to the rotating portion (2011); the rotating portion (2011) is mounted on a thrust member (218) via a wheel shaft; the rotating portion (2011) is provided with gear teeth (2013); the output shaft of the first motor (202) is provided with a gear (215) meshing with the gear teeth (2013) of the rotating portion (2011); the shielding portion (2012) rotates with the rotating portion (2011) to shield or open the two through holes (203); The thrust member (218) is provided with a limiting member (216) for limiting the rotation angle of the rotating member (201); A metal gasket (217) is provided between the thrust member (218), the rotating member (201) and the limiting member (216), and the limiting member (216) is provided on the metal gasket (217).

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