A multifunctional bed for elderly people with adaptive pressure relief

Abstract

The present invention discloses a multifunctional bed for the elderly with adaptive pressure relief. The mattress is a loofah fiber latex composite mattress, and is specifically placed on an automatically adjustable bed frame. A pressure sensor for sensing the stress conditions at various positions is arranged inside the mattress, and a pressure regulating device is arranged on the bed frame below the mattress; wherein the pressure sensor and the pressure regulating device are respectively connected to a host processor through an information collector, and the host processor is wirelessly connected to a mobile phone; when the host processor detects abnormal pressure at a certain position of the mattress through the pressure sensor, the host processor drives the pressure regulating device to regulate the pressure at the corresponding position. In the present invention, by designing both the mattress and the bed frame of the elderly nursing bed, the elderly's nursing needs such as physiological activity assistance, adaptive pressure relief, and pressure monitoring are met in many aspects, helping assisted elderly people to achieve normal life and healthy sleep.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent beds, and in particular to a multifunctional bed for elderly people that is adaptive to relieve pressure. Background Art

[0002] The aging of the population and the change in the way of elderly care have made the daily life care of the elderly in assisted status (elderly whose daily life behavior depends on the help of handrails, crutches, wheelchairs and lifting facilities, hereinafter referred to as assisted elderly) receive more and more attention and importance from the public, and the design of products to help care for assisted elderly is endless, including the research on nursing beds for the elderly. Studies have shown that if the pressure on the interface between the person and the bed is not relieved in time during sleep, pressure sores are very likely to occur, and relevant literature reports that about 60,000 people die from pressure sore complications each year. Therefore, when people use beds, they will use various sleeping behaviors and posture adjustments such as getting up and turning over to avoid excessive pressure on local parts of the body. However, due to their own inconvenience in movement, assisted elderly people cannot complete the movement and turning over normally. If the care is not timely and the care work is not in place, it will increase the incidence of their pressure sores. At present, domestic nursing beds generally use bed frame design to help the elderly turn over to relieve the pressure on the human-bed interface. Although this method has obvious effects, it is easy to affect the sleep continuity of the elderly, thereby reducing the sleep comfort of the elderly. In addition, long-term manual operation puts great pressure on nursing staff, and unreasonable turning time intervals may also lead to the formation of pressure sores. The pressure relief design of mattresses on the market mostly uses air bags to alternately inflate and deflate to change the pressure part of the person to relieve local pressure. However, frequent inflation and deflation will also affect sleep continuity to a certain extent. In addition, air bag beds have poor air permeability and are hard for long-term use, which can easily cause excessive local pressure on the human body. Therefore, it is particularly important to study and design elderly beds with adaptive pressure relief without interfering with the continuity of sleep.

[0003] In addition, studies have shown that damp skin is five times more likely to develop pressure sores than dry skin. When continuous pressure causes tissue ischemia, any increase in temperature will also increase the susceptibility of tissue to pressure sores. This means that bedding needs good heat and moisture removal performance to promptly remove the moisture and heat emitted by people every night to keep the bed surface comfortable and dry. A good human-bed sleeping microenvironment also avoids the breeding of mites and bacteria, which is beneficial to human sleep comfort. At present, the regulation of sleeping environment temperature and humidity in the market is roughly divided into two directions. One is to rely on external regulation mechanisms, such as adding temperature control and water supply devices to regulate temperature and humidity. This type of regulation mechanism requires large capital investment and is difficult to achieve temperature and humidity regulation without disturbing sleep; the second is to choose high-quality mattress filling materials. Good mattress filling materials can automatically adjust the temperature and humidity inside the mattress to create a good sleeping microenvironment. The common mattress filling materials on the market are palm, jute, latex, memory foam, etc. Among them, palm mattresses and jute mattresses are relatively hard, which is not conducive to pressure relief at the human-bed interface. Although latex, memory foam and other materials have good support or pressure relief properties, they have poor air permeability and permeability, and cannot meet the requirements of temperature and humidity control inside the mattress. Moreover, they are very likely to breed mites and bacteria after a long period of use. Luffa is a kind of abundant, light, natural, environmentally friendly and renewable biomass fiber material with good air permeability, cushioning and moisture absorption and dissipation properties. Studies have found that luffa contains palmitic acid, isopropyl palmitate, squalene and other substances. These substances have bactericidal, anti-inflammatory, anti-allergic and sleep-aiding effects. Pure natural biomass luffa fiber (cellulose) is compounded with latex to prepare a new type of plant fiber latex composite material as a mattress filling material. Not only does the mattress have the excellent characteristics of latex such as strong support and good elasticity, but it also has the high air permeability, high moisture absorption and dissipation, and antibacterial and anti-mite properties of luffa, so that the mattress can provide more reasonable support and the interior of the mattress can automatically adjust the temperature and humidity, creating a good sleeping microenvironment and more effectively preventing the occurrence of pressure sores. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multifunctional bed for the elderly with adaptive pressure relief, which is mainly used for assisted living elderly people. By performing non-interference pressure monitoring and adaptive pressure relief on the pressure at the human-bed interface, it effectively prevents the occurrence of pressure sores in the elderly, and can provide a pressure detection report and make suggestions for the elderly's sleep problems. In addition, the bed can help the elderly adaptively complete functions such as assisting in lifting the back, getting up, and getting out of bed, fully meeting the daily care needs of assisted living elderly people and improving the quality of care.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] An adaptive pressure-relieving multifunctional bed for the elderly, comprising an automatically adjustable bed frame, a mattress, a pressure sensor, an information collector, a host processor and a mobile phone;

[0007] The mattress is a loofah fiber latex composite mattress, and is specifically placed on an automatically adjustable bed frame. A pressure sensor for sensing the stress conditions at various positions is arranged inside the mattress, and a pressure regulating device is arranged on the bed frame below the mattress; wherein the pressure sensor and the pressure regulating device are respectively connected to a host processor through an information collector, and the host processor is wirelessly connected to a mobile phone; when the host processor detects abnormal pressure at a certain position of the mattress through the pressure sensor, the host processor drives the pressure regulating device to adjust the pressure at the corresponding position.

[0008] As one of the preferred embodiments of the present invention, the automatically adjustable bed frame includes a foldable bed frame, a front board, left and right side boards, left and right foldable safety guardrails, a cross brace, a bed board and a foot board, wherein the cross brace is arranged between the left and right side boards, and the left and right foldable safety guardrails are fixed to the upper ends of the left and right side boards; the front board, left and right side boards, left and right foldable safety guardrails, the cross brace and the foot board constitute a bed frame, and the bed frame is equipped with a bed board and a foldable bed frame; the bottom of the foldable bed frame is connected to a braking device, and under the drive of the braking device, the foldable bed frame can be folded relative to the bed frame.

[0009] As one of the preferred embodiments of the present invention, the foldable bed slat frame includes a slat frame support frame and a plurality of unit slat frames installed in double rows in parallel on the slat frame support frame, each unit slat frame is 725 mm long and 80 mm wide; each of the unit slat frames includes a round bamboo spring piece, a sleeve for fixing the round bamboo spring piece, and an adjusting pressure device connected to the sleeve; the adjusting pressure device is used for adjusting the pressure when the surface of the round bamboo spring piece is subjected to force.

[0010] As one of the preferred embodiments of the present invention, the round bamboo shrapnel on each of the unit row skeletons is specifically a double-row round bamboo shrapnel with a two-layer or three-layer structure, and the two ends of the double-row round bamboo shrapnel with a two-layer or three-layer structure are matched with a pair of sleeves arranged facing each other; the inner ends of the sleeves are respectively provided with two side-by-side hole grooves, and the opening height of the hole grooves corresponds to the thickness of the three-layer round bamboo shrapnel, and the bottom ends of the two side walls of the hole grooves are respectively formed with a pair of dovetail grooves, and the dovetail grooves are matched with a separately provided pad with a dovetail tenon.

[0011] As one of the preferred embodiments of the present invention, the pressure regulating device comprises a support base, a support rod, a slider, a fixing block and an electric telescopic hydraulic rod;

[0012] The support base is arranged below the round bamboo spring piece, and a fixed block and a sliding block are sleeved on the support base, the fixed block is fixedly connected to the support base, and the sliding block is slidably connected to the support base; four support rods are arranged in groups of two, and are respectively arranged in parallel on both sides of the support base; one end of the support rod is fixed to the connecting body and connected to the sleeve head above it through the connecting body, and the other end of the support rod extends in a direction close to the middle of the support base, and sequentially crosses the circular holes on the sliding block and the fixed block, and is fixedly connected to the fixed block; wherein, the sliding block slides on the support rod and the support base between the connecting body and the fixed block;

[0013] One side of the motor of the electric telescopic hydraulic rod is fixed to the lower part of the fixed block, and one side of the telescopic end of the electric telescopic hydraulic rod is fixed to the lower part of the slider; the slider slides on the support rod and the support base through the electric telescopic hydraulic rod, and the effective size of the support rod is changed by sliding the slider on the support rod.

[0014] As one of the preferred embodiments of the present invention, the foldable bed frame is divided into a back support frame, a hip support frame, a leg support frame and a foot support frame in sequence along its longitudinal direction, and any two adjacent slats among the back support frame, the hip support frame, the leg support frame and the foot support frame are hingedly connected; wherein, a braking device is respectively connected to the bottom of the back support frame and the leg support slat frame, and the two are folded by the braking device.

[0015] As one of the preferred embodiments of the present invention, each of the braking devices comprises an electric metal push-pull rod, two fixing nuts, two arc-shaped slideways, a support sheet, a positioning rod and a motor; wherein the positioning rod is arranged transversely at the bottom of the back support slat frame / leg support slat frame, the middle part of the positioning rod is rotatably connected to the electric metal push-pull rod, and both ends of the positioning rod are respectively fixedly connected to an arc-shaped slideway;

[0016] The arc-shaped slide is bent upward to form a shape, and a support sheet acting upward is connected to the top of one end of the arc-shaped slide, and the support sheet is fixedly connected to the back support row frame / leg support row frame above it; in addition, a slide rail is provided on the side of the arc-shaped slide away from the direction of the positioning rod, and a fixing nut is slidably fitted in the slide rail; wherein the outer end of the fixing nut is fixedly connected to the corresponding bed frame, and the inner end of the fixing nut is movably connected to the slide rail;

[0017] The front part of the electric metal push-pull rod is a telescopic end, which is rotatably connected to the middle part of the positioning rod; the rear part of the electric metal push-pull rod is connected to a motor, which is fixed on a cross brace; wherein, driven by the motor, the electric metal push-pull rod drives the arc-shaped slide to slide on the fixing nut.

[0018] As one of the preferred embodiments of the present invention, it also includes a positioning block, which is a metal groove-shaped block distributed at the intersection of the leg support slat frame and the foot support slat frame of the foldable bed slat frame, one side of the groove is fixed to the edge of the leg support slat frame with screws, and the side close to the foot support slat frame is not fixed.

[0019] Furthermore, the multifunctional bed also includes an insulated silent universal wheel and an insulated silent retractable universal wheel for the bed frame; the insulated silent universal wheel for the bed frame is arranged at the bottom of the left and right side boards, and the insulated silent retractable universal wheel is arranged at the bottom of the foot board.

[0020] As one of the preferred embodiments of the present invention, the mattress comprises, from top to bottom, a fabric composite layer, an upper cushion layer, a bed core, and a lower cushion layer; wherein, the fabric composite layer is made of quilted non-woven fabric, and serves as a mattress wrapping layer, and the pressure sensor is arranged in the fabric composite layer; the bed core is made of hard cut sponge, and serves as a support layer of the mattress; the upper cushion layer and the lower cushion layer are made of loofah fiber latex composite material, and are respectively represented as an upper cushion layer made of loofah fiber latex composite material and a lower cushion layer made of loofah fiber latex composite material; wherein, the thickness of the upper cushion layer made of loofah fiber latex composite material is greater than the thickness of the lower cushion layer made of loofah fiber latex composite material, and the density of the upper cushion layer made of loofah fiber latex composite material is less than the density of the lower cushion layer made of loofah fiber latex composite material.

[0021] As one of the preferred embodiments of the present invention, the method for preparing the upper cushion layer and the lower cushion layer comprises the following steps:

[0022] (1) by water and detergent, loofah is cleaned, dirt and foreign matter on the loofah surface are removed, and then with water, the detergent on the loofah fiber surface is cleaned up; Again the loofah fiber is put into a forced air drying oven, and continuously dried at 100 ℃ until removing wherein volatile, easily decomposable components, and then the loofah fiber is pulverized and then passed through 60 mesh sieves for standby use;

[0023] (2) immersing the sieved loofah fiber after the above treatment in a sodium hydroxide solution, treating it at room temperature for 2 hours, then washing it with distilled water until it is neutral, and drying it at 70° C. for 72 hours to obtain an alkali-treated loofah fiber;

[0024] (3) weighing 2 g of silane coupling agent, diluting the coupling agent with ethanol to 1%, mixing it with the alkali-treated loofah fiber under sufficient stirring, and drying it in a 100° C. oven for 72 h to evaporate the residual solvent to obtain the loofah fiber treated with the coupling agent;

[0025] (4) putting the latex into a barrel and stirring it with an ammonia removal device to volatilize the ammonia, and then discharging the ammonia through an ammonia extraction pipeline until the ammonia content in the natural latex drops below the standard, thereby obtaining ammonia-free latex;

[0026] (5) Preparation of compounding agent:

[0027] 10% casein solution: weigh all ingredients according to the ratio, add water into a container with a stirring device, then add casein, borax and ammonia water in sequence under stirring at 50°C, and heat and stir until completely dissolved to make a casein solution;

[0028] 50% sulfur dispersion: Grind sulfur powder in a mortar for later use, weigh each ingredient according to the ratio; add water to a container with a stirring device, then add casein solution, sodium hydroxide solution, diffusion agent NF, sulfur in sequence under stirring, and stir continuously for 5-8 hours to obtain sulfur dispersion, and adjust the pH value of the dispersion to 10-11, and leave it for more than 12 hours before use;

[0029] The preparation method of 50% foaming agent dispersion, 50% foaming aid dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion, 50% antioxidant DNP dispersion, and 50% talcum powder dispersion is the same as above;

[0030] 20% sodium fluorosilicate dispersion: grind sodium fluorosilicate powder in a mortar, add water, and then adjust the pH value to 6 to obtain sodium fluorosilicate dispersion;

[0031] (6) Add 50% sulfur dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion, and 50% antioxidant dispersion to the latex, stirring while adding, stirring for 20-30 minutes after adding, and letting it stand for use;

[0032] (7) The latex prepared in step (6) is allowed to stand for use and then stirred before use; ① adding 2% of a 50% foaming agent dispersion, then adding 50% of a foaming aid dispersion, and then 50% of a talcum powder dispersion in sequence, and after mixing evenly, adding 20% ​​of a sodium fluorosilicate dispersion and a loofah fiber, and then stirring to the gel point and then rapidly injecting and gelling to obtain a density of 45 kg / m 3 ② Add 3% of 50% foaming agent dispersion, then add 50% foaming aid dispersion, 50% talcum powder dispersion, mix well, add 20% sodium fluorosilicate dispersion and guar fiber, stir to gel point, then quickly inject and gel to obtain a density of 40kg / m 3 The foam material is used as the shoulder part of the pillow;

[0033] (8) The mold is cleaned, preheated, coated with a release agent, and finally demolded to obtain the finished product.

[0034] The advantages of the present invention over the prior art are: (1) In the present invention, by designing the mattress and bed frame of the elderly care bed, the elderly's care needs such as physiological activity assistance, adaptive pressure relief and pressure monitoring are met in many aspects, helping assisted elderly people to achieve normal life and healthy sleep.

[0035] (2) In the present invention, by real-time monitoring of the pressure at the human-bed interface and taking the detection results as a theoretical basis, the electric telescopic hydraulic rod is used to intelligently and automatically move the position of the slider on the support rod, thereby quantitatively adjusting the hardness of the slat frame, and realizing adaptive dynamic relief and adjustment of the pressure at various parts of the human-bed interface, so as to meet the support force needs of different parts of the elderly with different body shapes, and ensure that the human spine is in a natural curved state. In this way, the defect of the existing nursing bed that the hardness of various parts of the mattress cannot be automatically adjusted without interfering with the continuity of the elderly's sleep, resulting in the elderly being prone to bedsores due to long-term static pressure, is overcome.

[0036] (3) In the present invention, the slat frame can quantitatively adjust and control the hardness of each area of ​​the slat frame by grading the density, elastic modulus, and carbonization degree of the round bamboo spring pieces, combined with the control of the number of bamboo spring piece layers, to help meet the support performance requirements of different areas of the bed surface for people of different body shapes and weights. Generally, the greater the density of the bamboo spring piece, the smaller the elastic modulus, the higher the carbonization degree, and the more layers, the greater the hardness of the bamboo spring piece elastic body unit.

[0037] (4) The present invention provides a pressure monitoring technology for assisted living elderly people. The monitoring technology can monitor the pressure changes at the person-bed interface in real time, identify the sleeping behavior and posture of the elderly, provide a sleep pressure monitoring report, and make reasonable suggestions for the elderly's sleep problems.

[0038] (5) In the present invention, natural loofah fiber material and latex are used in combination to prepare a new type of plant fiber latex composite material as a mattress filling material, which can overcome the shortcomings of latex such as poor air permeability and permeability, and give full play to the high air permeability, high moisture absorption and dissipation, antibacterial and anti-mite properties of loofah, as well as the advantages of latex such as good support and good elasticity, thereby helping to create a good human-bed microenvironment and improve people's sleep quality.

[0039] (6) In the present invention, loofah is used as the raw material for latex foaming. By quantitatively sorting the diameter, size and density of the loofah, and quantitatively compressing it, loofah latex composite materials with different densities and hardnesses can be obtained, thereby achieving quantitative support of the material for different parts of different groups of people and better meeting the sleep needs of the elderly.

[0040] (7) In the present invention, the design of the bed braking device can help assisted elderly people to achieve activities such as assisted back lifting, assisted standing up, and assisted getting out of bed, fully meeting the daily care needs of assisted elderly people, improving the quality of care, and reducing the pressure of care. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the overall functional structure of the bed in this embodiment;

[0042] Figure 2 This is an overall schematic diagram of a bed frame (in a flat state) of the bed in this embodiment;

[0043] Figure 3 This is an overall schematic diagram of the bed frame (in the back-lifting state) of the bed in this embodiment;

[0044] Figure 4 This is an overall schematic diagram of the bed frame (in the standing state) of the bed in this embodiment;

[0045] Figure 5 This is a schematic diagram of the overall disassembly of the bed frame (in a flat state) of the bed in this embodiment;

[0046] Figure 6 This is a schematic diagram of a braking device for a bed in this embodiment;

[0047] Figure 7 This is a schematic diagram of a motor of a bed in this embodiment;

[0048] Figure 8 This is an overall schematic diagram of the bed frame of the bed in this embodiment;

[0049] Fig. 9 This is a schematic diagram of the partitioning of the bed frame of the bed in this embodiment;

[0050] Fig.10 This is a schematic diagram of a bed unit frame (with three layers of bamboo springs) of the bed in this embodiment;

[0051] Fig.11 This is a schematic diagram of the disassembly of a bed unit frame (with three layers of bamboo springs) of the bed in this embodiment;

[0052] Fig.12 This is a schematic diagram of a bed unit frame (with two layers of bamboo springs) of the bed in this embodiment;

[0053] Fig.13 This is a schematic diagram of the disassembly of a bed unit frame (with two layers of bamboo springs) of the bed in this embodiment;

[0054] Fig.14 is an overall schematic diagram of the metal sleeve and the bamboo insert in this embodiment;

[0055] Fig.15 This is a schematic diagram A of the adaptive hardness adjustment process of the bed unit frame structure (with 3 layers of bamboo shrapnel) in this embodiment;

[0056] Fig.16 This is a schematic diagram B of the adaptive hardness adjustment process of the bed unit frame structure (with 3 layers of bamboo shrapnel) in this embodiment;

[0057] Fig.17 This is a schematic diagram C of the adaptive hardness adjustment process of the bed unit frame structure (with 3 layers of bamboo shrapnel) in this embodiment;

[0058] Fig.18 This is a partial enlarged view A of the softness and hardness adjustment of the electric telescopic hydraulic rod of the bed unit frame structure (with 3 layers of bamboo shrapnel) in this embodiment;

[0059] Fig.19 This is a partial enlarged view B of the softness and hardness adjustment of the electric telescopic hydraulic rod of the bed unit frame structure (with 3 layers of bamboo shrapnel) in this embodiment;

[0060] Fig. 20 This is a schematic diagram of the electric telescopic hydraulic rod of the bed unit frame in this embodiment;

[0061] Fig.21 This is a schematic diagram of the layered structure of a bed mattress in this embodiment;

[0062] Fig. 22 This is a schematic cross-sectional view of the mattress layer in this embodiment, that is, a horizontal distribution diagram of the pressure sensors. DETAILED DESCRIPTION

[0063] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0064] Example 1

[0065] like Figure 1-22 As shown, an adaptive pressure-relieving multifunctional bed for the elderly in this embodiment includes an automatically adjustable bed frame 1, a mattress 2, a pressure sensor 3, an information collector 4, a host processor 5 and a mobile phone 6.

[0066] The mattress 2 is a loofah fiber latex composite mattress, and is specifically placed on the automatically adjustable bed frame 1. A pressure sensor 3 for sensing the stress conditions at various positions is provided in the mattress 2, and a pressure regulating device is provided on the bed frame below the mattress 2; wherein the pressure sensor 3 and the pressure regulating device are respectively connected to the host processor 5 through the information collector 4, and the host processor 5 is wirelessly connected to the mobile phone 6. When the host processor 5 detects abnormal pressure at a certain position of the mattress 2 through the pressure sensor 3, the host processor 5 drives the pressure regulating device to adjust the pressure at the corresponding position.

[0067] See also Figure 2-5 In a specific embodiment, the automatically adjustable bed frame 1 includes a foldable bed frame 12, a front board 13, left and right side boards 14, two left and right foldable safety guardrails 15, a cross brace 16, a bed board 112 and a foot board 18, wherein the cross brace 16 is arranged between the left and right side boards 14, and the left and right two foldable safety guardrails 15 are fixed to the upper ends of the left and right side boards 14; the front board 13, the left and right side boards 14, the left and right two foldable safety guardrails 15, the cross brace 16 and the foot board 18 constitute a bed frame 11, and the bed frame 11 is installed with a bed board 112 and a foldable bed frame 12; the bottom of the foldable bed frame 12 is connected to a braking device 17, and under the drive of the braking device 17, the foldable bed frame 12 can be folded relative to the bed frame 11.

[0068] See also Figure 5 , Figure 8-10 Specifically, the foldable bed slat frame 12 includes a slat frame support frame 122 and a plurality of unit slat frames 121 installed in double rows in parallel on the slat frame support frame 122, each unit slat frame 121 is 725 mm long and 80 mm wide; each unit slat frame 121 includes a round bamboo spring piece 1211, a sleeve 1212 for fixing the round bamboo spring piece 1211, and an adjusting pressure device connected to the sleeve 1212; the adjusting pressure device is used for adjusting the pressure when the surface of the round bamboo spring piece 1211 is subjected to force.

[0069] For further information, see Figure 11-13The round bamboo shrapnel 1211 on each unit row frame 121 is specifically a double-row round bamboo shrapnel 1211 with a two-layer or three-layer structure. The two ends of the double-row round bamboo shrapnel 1211 with a two-layer or three-layer structure are matched with a pair of sleeves 1212 arranged opposite to each other; the inner side ends of the sleeves 1212 are respectively provided with two parallel hole grooves, and the opening height of the hole grooves corresponds to the thickness of the three-layer round bamboo shrapnel 1211, and the bottom ends of the two side walls of the hole grooves are also respectively formed with A pair of dovetail grooves, the dovetail grooves cooperate with a separately provided pad 1212a with a dovetail tenon (when only two-layer double-row round bamboo shrapnel 1211 is needed, first install the pad 1212a with a dovetail tenon at the dovetail groove of the hole groove, and then place the two-layer double-row round bamboo shrapnel 1211 on the pad 1212a with a dovetail tenon; when three-layer double-row round bamboo shrapnel 1211 is needed, the pad 1212a with a dovetail tenon is not required). In this embodiment, the round bamboo shrapnel 1211 has a length of 700mm, a width of 30mm, and a thickness of 5mm. It is an ecological material with abundant resources, renewable, degradable, low energy consumption, no pollution, good elasticity, etc. This embodiment can achieve the hardness and softness adjustment of the slat frame by controlling the number of layers of the round bamboo shrapnel; the more layers of the round bamboo shrapnel, the greater the hardness of the slat frame.

[0070] For further information, see Fig.11 , Figure 13-20 : The pressure adjusting device includes a supporting base 1216, a supporting rod 1213, a sliding block 1214, a fixing block 1215 and an electric telescopic hydraulic rod 1217.

[0071] The support base 1216 is arranged below the round bamboo shrapnel 1211, and two fixed blocks 1215 and two sliding blocks 1214 are sleeved on the support base 1216. The two fixed blocks 1215 are fixedly connected to the support base 1216, and the two sliding blocks 1214 are slidably connected to the support base 1216, and the two sliding blocks 1214 are respectively arranged on the outside of the two fixed blocks 1215; four support rods 1213 are arranged, two by two in a group, and are respectively arranged in parallel on both sides of the support base 1216; One end of the support rod 1213 is fixed to the connecting body 1212b and connected to the sleeve 1212 above it through the connecting body 1212b. The other end of the support rod 1213 extends in the direction close to the middle of the support base 1216, and crosses the circular holes on the slider 1214 and the fixed block 1215 in turn, and is fixedly connected to the fixed block 1215; wherein the slider 1214 slides on the support rod 1213 and the support base 1216 between the connecting body 1212b and the fixed block 1215. When the slider 1214 slides to both ends of the unit slat frame 121, the functional size of the support rod 1213 is zero. At this time, a vertical downward force is applied to the round bamboo shrapnel 1211, and the physical adjustment of the hardness and softness in the unit slat frame 121 is invalid. When the slider 1214 is pushed to gradually move toward the center of the unit slat frame 121, the closer the slider is to the center, the greater the bending arc of the support rod 1213 after being compressed, the longer the functional size of the support rod 1213, and the softer the slat frame. The sleeve 1212 can directly fix the three-layer round bamboo shrapnel 1211, or a pad 1212a with a dovetail tenon made of the same material should be inserted into the sleeve to fix the double-layer round bamboo shrapnel.

[0072] One side of the motor of the electric telescopic hydraulic rod 1217 is fixed to the lower part of the fixed block 1215, and one side of the telescopic end of the electric telescopic hydraulic rod 1217 is fixed to the lower part of the slider 1214; the slider 1214 slides on the support rod 1213 and the support base 1216 through the electric telescopic hydraulic rod 1217, and the sliding of the slider 1214 on the support rod 1213 changes the effective size of the support rod 1213.

[0073] The dimensions of the bed in this embodiment are 2000 mm in length and 1500 mm in width; among them, the sleeve 1212, the slider 1214, and the fixing block 1215 are made of high-strength metal materials, and the support base 1216 is made of reconstructed bamboo to ensure the stability of the unit rib frame 121 during the process of adjusting the softness and hardness, and the support rod 1213 is made of elastic metal material.

[0074] Furthermore, the slider 1214 is also provided with a nut mounting hole and a tensioning nut matching the nut mounting hole. When the electric telescopic rod of the pressure adjustment device fails, the tensioning nut can also be used as a manual tension adjustment device when sliding the slider 1214 left and right.

[0075] For further information, see Figure 8 The foldable bed slat frame 12 is divided into a back support slat frame 12a, a hip support slat frame 12b, a leg support slat frame 12c and a foot support slat frame 12d in sequence along its longitudinal direction, and the back support slat frame 12a, the hip support slat frame 12b, the leg support slat frame 12c and the foot support slat frame 12d are hingedly connected to each other in pairs; wherein, the bottom of the back support slat frame 12a and the leg support slat frame 12c are respectively connected to a braking device 17, and the two are folded by the braking device 17.

[0076] In this embodiment, the size of the back support rib frame 12a is 800mm*1500mm, the size of the hip support rib frame 12b is 300mm*1500mm, the size of the leg support rib frame 12c is 350mm*1500mm, and the size of the foot support rib frame 12d is 550mm*1500mm.

[0077] For details, see Figure 6-7 : Each of the braking devices 17 comprises an electric metal push-pull rod 171, two fixing nuts 172, two arc-shaped slideways 173, a support sheet 1731, a positioning rod 174, a motor 175, a power supply 176 and a controller 177; wherein the positioning rod 174 is arranged transversely at the bottom of the back support slat frame 12a / leg support slat frame 12c, the middle part of the positioning rod 174 is rotatably connected to the electric metal push-pull rod 171, and both ends of the positioning rod 174 are respectively fixedly connected to an arc-shaped slideway 173;

[0078] The arc-shaped slide 173 is bent upward to form a shape, and a support sheet 1731 acting upward is connected to the top of one end of the arc-shaped slide 173, and the support sheet 1731 is fixedly connected to the back support row frame 12a / leg support row frame 12c above it; in addition, a slide rail is provided on the side of the arc-shaped slide 173 away from the positioning rod 174, and a fixing nut 172 is slidably fitted in the slide rail; wherein the outer end of the fixing nut 172 is fixedly connected to the corresponding bed frame 11, and the inner end of the fixing nut 172 is movably connected to the slide rail;

[0079] The front part of the electric metal push-pull rod 171 is a telescopic end, and the telescopic end is rotatably connected to the middle part of the positioning rod 174; the rear part of the electric metal push-pull rod 171 is connected to the motor 175, and the motor 175 is fixed on the cross brace 16; wherein, under the drive of the motor 175, the electric metal push-pull rod 171 drives the arc slide 173 to slide on the fixing nut 172;

[0080] The power supply 176 is connected to the electric metal push-pull rod 171 to provide a power source therefor; the controller 177 is used to control the electric metal push-pull rod 171, allowing the user to manually control the flip angle of the back support slat frame 12a and the leg support slat frame 12c of the nursing bed.

[0081] It should be noted that the back support slat frame 12a can be flipped 0-60°, and the leg support slat frame 12c can be flipped 0-80°; the support plate 1731 on the arc slide 173 pushes the back support slat frame 12a to lift the back and pulls the leg support slat frame 12c to bend downward to provide leg space, thereby completing the folding function of the bed frame.

[0082] For further information, see Fig. 9 : It also includes a positioning block 111, which is a metal groove-shaped block distributed at the intersection of the leg support slat frame 12c and the foot support slat frame 12d of the foldable bed slat frame 12. One side of the groove is fixed to the edge of the leg support slat frame 12c with screws, and the side close to the foot support slat frame 12d is not fixed.

[0083] For further information, see Figure 4 The multifunctional bed also includes an insulating and silent universal wheel 19 for the bed frame and an insulating and silent retractable universal wheel 110; the insulating and silent universal wheel 19 for the bed frame is arranged at the bottom of the left and right side boards 14, and the insulating and silent retractable universal wheel 110 is arranged at the bottom of the foot board 18, and the insulating and silent retractable universal wheel 110 can be retracted according to the downward bending of the leg support slat frame 12c. The insulating and silent universal wheel 19 and the insulating and silent retractable universal wheel 110 are both made of plastic.

[0084] In a specific implementation, when the leg support slat frame 12c and the foot support slat frame 12d return to a horizontal state, the blocking effect of the positioning block 111 is used to realize the positioning of the bed frame reset, thereby completing the entire workflow of the foldable bed slat frame 12.

[0085] For further information, see Fig.21:The mattress 2 includes a fabric composite layer 21, an upper cushion layer 22, a bed core 23, and a lower cushion layer 24 from top to bottom; wherein the fabric composite layer 21 is made of quilted non-woven fabric, and serves as a wrapping layer of the mattress 2; the bed core 23 is made of hard flower-cut sponge, and serves as a support layer of the mattress; the upper cushion layer 22 and the lower cushion layer 24 are made of loofah fiber latex composite material, and are respectively represented as an upper cushion layer 221 made of loofah fiber latex composite material and a lower cushion layer 241 made of loofah fiber latex composite material; wherein the upper cushion layer 22 and the lower cushion layer 24 are composed of loofah fiber latex composite materials of different densities, hardnesses, and thicknesses. The upper cushion layer 22 is thicker, has a lower density, and is softer, which can improve the comfort of the elderly care bed; the lower cushion layer 24 is thinner, has a higher density than the upper cushion layer 22, has a higher hardness, and has good air permeability, which improves the stability of the mattress 2.

[0086] See also Fig. 22 : The pressure sensor 3 is fixed in the fabric composite layer 21 of the cushioning layer, and the information collector 4 synchronously collects the local pressure information of each area and the overall bed surface pressure information, and transmits the collected human-bed interface pressure distribution value to the host processor 5 through the information collector 4. After the host processor 5 processes and judges the information, it issues an instruction to the electric telescopic hydraulic rod 1217, and uses the slider 1214 to realize the intelligent adaptive pressure relief adjustment of the bed. At the same time, it realizes real-time monitoring of the pressure during sleep, provides a pressure detection report, issues sleep suggestions, and feedbacks to the smart terminal mobile phone 6, so as to complete the real-time monitoring of the sleep condition of the elderly.

[0087] Furthermore, the preparation method of the upper cushion layer 22 and the lower cushion layer 24 includes the following steps:

[0088] 1. Clean the loofah with water and detergent to remove dirt and debris on the surface of the loofah, and then clean the detergent on the surface of the loofah fiber with water; then put the loofah fiber into a blast drying oven, and continuously dry it at 100° C. until the volatile and easily decomposable components are removed, and then the loofah fiber is crushed and passed through a 60-mesh sieve for standby use;

[0089] 2. Immerse the sieved loofah fibers after the above treatment in a NaOH solution, treat at room temperature for 2 hours, then wash with distilled water until neutral, and dry at 70° C. for 72 hours to obtain alkali-treated loofah fibers;

[0090] 3. Weigh 2 g of silane coupling agent KH550, dilute the coupling agent with ethanol to 1% by mass, mix it evenly with the alkali-treated loofah fiber under sufficient stirring, put it in a 100° C. oven and dry it for 72 h to evaporate the residual solvent, and obtain the loofah fiber treated with the coupling agent;

[0091] 4. Put the latex into a barrel and stir it with ammonia removal equipment to volatilize the ammonia, and then discharge the ammonia through the ammonia extraction pipeline until the ammonia content in the natural latex drops below the standard to obtain ammonia-free latex;

[0092] 5. Preparation of compounding agent:

[0093] 10% casein solution: weigh all ingredients according to the ratio, add water into a container with a stirring device, then add casein, borax and ammonia water in sequence under stirring at 50°C, heat and stir until completely dissolved, and then prepare casein solution;

[0094] 50% sulfur dispersion: Grind sulfur powder in a mortar for later use, weigh each ingredient according to the ratio; add water to a container with a stirring device, then add casein solution, sodium hydroxide solution, diffusion agent NF, sulfur in sequence under stirring, and stir continuously for 5-8 hours to obtain sulfur dispersion, and adjust the pH value of the dispersion to 10-11, and leave it for more than 12 hours before use;

[0095] The preparation method of 50% foaming agent dispersion, 50% foaming aid dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion, 50% antioxidant DNP dispersion, and 50% talcum powder dispersion is the same as above;

[0096] 20% sodium fluorosilicate dispersion: Grind the sodium fluorosilicate powder in a mortar, add water, and then adjust the pH value to about 6 to obtain a sodium fluorosilicate dispersion;

[0097] 6. Add 50% sulfur dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion and 50% antioxidant dispersion to the latex, stirring while adding, stirring for 20-30 minutes after adding, and let it stand for use;

[0098] 7. Stir the latex in step 6 before use; ① add 2% of 50% foaming agent dispersion, then add 50% foaming aid dispersion, 50% talcum powder dispersion in sequence, mix well, add 20% sodium fluorosilicate dispersion and luffa fiber with different contents, stir to gel point and then quickly inject and gel to obtain a density of 45kg / m 3 ② Add 3% of 50% foaming agent dispersion, then add 50% foaming aid dispersion, 50% talcum powder dispersion, mix well, add 20% sodium fluorosilicate dispersion and loofah fiber with different contents, stir until the gel point, then quickly inject and gel to obtain a density of 40kg / m 3 The foam material is used as the shoulder part of the pillow;

[0099] 8. Finally, clean the mold, preheat it, apply a release agent, and then demould it to get the finished product.

[0100] During the preparation process, loofah is used as the raw material for latex foaming. Through quantitative sorting of the diameter, size and density of the loofah, as well as quantitative compression treatment, loofah latex composite materials with different densities and hardnesses can be obtained.

[0101] Next, the adaptive pressure relief and pressure monitoring of the nursing bed are further explained:

[0102] ① The human body lies on the bed, and the mattress frame 12 is longitudinally divided into four areas: a back support frame 12a, a hip support frame 12b, a leg support frame 12c and a foot support frame 12d;

[0103] ② Under the weight of the person, the fabric composite layer 21 is compressed and deformed, and the pressure sensor 3 placed in the fabric composite layer synchronously obtains an output electrical signal;

[0104] ③ The information collector 4 collects the change in the electrical signal output by the pressure sensor 3 and transmits it to the host processor 5;

[0105] ④ The host processor 5 processes and analyzes the information, and determines the hardness of the slat frame that is suitable for the supporting performance of each part by judging the pressure of each part. When the user's local pressure is too large (over 6.6kpa) and the time is long (over 10min), the host processor 5 sends an adjustment command to the electric telescopic hydraulic rod 1217 in a certain area, so that the electric telescopic hydraulic rod 1217 pushes the slider 1214 to move left and right, so as to adjust the hardness of the unit slat frame 121 in a certain area, and finally realize the intelligent adaptive pressure relief in this area.

[0106] ⑤ The host processor 5 can compile and provide a pressure detection report based on the pressure changes of the human-bed interface monitored at night, and feedback to the smart terminal mobile phone 6, and combine ergonomic theory and healthy sleep research to provide suggestions for sleep problems of the elderly.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive pressure relief multifunctional bed for the elderly, characterized in that: It comprises an automatically adjustable bed frame (1), a mattress (2), a pressure sensor (3), an information collector (4), a host processor (5) and a mobile phone (6); The mattress (2) is a loofah fiber latex composite mattress and is specifically placed on an automatically adjustable bed frame (1). A pressure sensor (3) for sensing the stress conditions at various positions is arranged inside the mattress (2), and a pressure regulating device is arranged on the bed frame below the mattress (2); wherein the pressure sensor (3) and the pressure regulating device are respectively connected to a host processor (5) via an information collector (4), and the host processor (5) is wirelessly connected to a mobile phone (6); when the host processor (5) detects the pressure at a certain position of the mattress (2) via the pressure sensor (3), the pressure sensor (3) and the pressure regulating device are automatically adjusted. When an abnormality occurs, the host processor (5) drives the pressure regulating device to regulate the pressure at the corresponding position. The automatically adjustable bed frame (1) comprises a foldable bed frame (12), a front bed board (13), left and right side boards (14), two left and right foldable safety guardrails (15), a cross brace (16), a bed board (112) and a foot board (18), wherein the cross brace (16) is arranged between the left and right side boards (14), and the two left and right foldable safety guardrails (15) are fixed to the upper ends of the left and right side boards (14); the front bed board (13), the left and right side boards (14), the left and right side boards (15) and the foot board (18) are A bed frame (11) is formed between two foldable safety guardrails (15), a cross brace (16) and a footboard (18), and a bed board (112) and a foldable bed row frame (12) are installed on the bed frame (11); a brake device (17) is connected to the bottom of the foldable bed row frame (12); under the drive of the brake device (17), the foldable bed row frame (12) can be folded relative to the bed frame (11); the foldable bed row frame (12) comprises a row frame support frame (122) and two rows of row frame support frames (122) and two rows of row frame support frames (122) are installed in parallel on the row frame support frame (122). 122); each of the unit row frames (121) comprises a round bamboo spring piece (1211), a sleeve (1212) for fixing the round bamboo spring piece (1211), and a pressure regulating device connected to the sleeve (1212); the pressure regulating device is used for regulating the pressure when the surface of the round bamboo spring piece (1211) is subjected to force, and the pressure regulating device comprises a supporting base (1216), a supporting rod (1213), a sliding block (1214), a fixing block (1215), and an electric telescopic hydraulic rod (1217); The support base (1216) is arranged below the round bamboo shrapnel (1211); a fixed block (1215) and a sliding block (1214) are sleeved on the support base (1216); the fixed block (1215) is fixedly connected to the support base (1216); the sliding block (1214) is slidably connected to the support base (1216); four support rods (1213) are arranged in pairs and are arranged in parallel on both sides of the support base (1216); one end of the support rod (1213) is fixed to the connector (1211); 2b), and connected to the sleeve (1212) above it through the connecting body (1212b), the other end of the support rod (1213) extends in the direction close to the middle of the support base (1216), and sequentially crosses the circular holes on the slider (1214) and the fixed block (1215), and is fixedly connected to the fixed block (1215); wherein the slider (1214) slides on the support rod (1213) and the support base (1216) between the connecting body (1212b) and the fixed block (1215); One side of the motor of the electric telescopic hydraulic rod (1217) is fixed to the lower part of the fixed block (1215), and one side of the telescopic end of the electric telescopic hydraulic rod (1217) is fixed to the lower part of the slider (1214); the slider (1214) slides on the support rod (1213) and the support base (1216) through the electric telescopic hydraulic rod (1217), and the sliding of the slider (1214) on the support rod (1213) changes the effective size of the support rod (1213); the mattress (2) comprises, from top to bottom, a fabric composite layer (21), an upper cushion layer (22), a bed core (23), and a lower cushion layer (24); wherein the fabric composite layer (21) is made of quilted non-woven fabric and serves as a wrapping layer of the mattress (2), and a fabric composite layer (21) is provided inside the fabric composite layer (21). The pressure sensor (3); the bed core (23) is made of hard flower-cut sponge as the support layer of the mattress; the upper cushion layer (22) and the lower cushion layer (24) are made of loofah fiber latex composite material, and are respectively represented as the upper cushion layer (221) made of loofah fiber latex composite material and the lower cushion layer (241) made of loofah fiber latex composite material; wherein the thickness of the upper cushion layer (221) made of loofah fiber latex composite material is greater than the thickness of the lower cushion layer (241) made of loofah fiber latex composite material, and the density of the upper cushion layer (221) made of loofah fiber latex composite material is less than the density of the lower cushion layer (241) made of loofah fiber latex composite material, and the preparation method of the upper cushion layer (22) and the lower cushion layer (24) comprises the following steps: (1) by water and detergent, loofah is cleaned, dirt and foreign matter on the loofah surface are removed, and then with water, the detergent on the loofah fiber surface is cleaned up; Again the loofah fiber is put into a forced air drying oven, and continuously dried at 100 ℃ until removing wherein volatile, easily decomposable components, and then the loofah fiber is pulverized and then passed through 60 mesh sieves for standby use; (2) immersing the sieved loofah fiber after the above treatment in a sodium hydroxide solution, treating it at room temperature for 2 hours, then washing it with distilled water until it is neutral, and drying it at 70° C. for 72 hours to obtain an alkali-treated loofah fiber; (3) weighing 2 g of silane coupling agent, diluting the coupling agent with ethanol to 1%, mixing it with the alkali-treated loofah fiber under sufficient stirring, and drying it in a 100° C. oven for 72 h to evaporate the residual solvent to obtain the loofah fiber treated with the coupling agent; (4) putting the latex into a barrel and stirring it with an ammonia removal device to volatilize the ammonia, and then discharging the ammonia through an ammonia extraction pipeline until the ammonia content in the natural latex drops below the standard, thereby obtaining ammonia-free latex; (5) Preparation of compounding agent: 10% casein solution: weigh all ingredients according to the ratio, add water into a container with a stirring device, then add casein, borax and ammonia water in sequence under stirring at 50°C, and heat and stir until completely dissolved to make a casein solution; 50% sulfur dispersion: Grind sulfur powder in a mortar for later use, weigh each ingredient according to the ratio; add water to a container with a stirring device, then add casein solution, sodium hydroxide solution, diffusion agent NF, sulfur in sequence under stirring, and stir continuously for 5-8 hours to obtain sulfur dispersion, and adjust the pH value of the dispersion to 10-11, and leave it for more than 12 hours before use; The preparation method of 50% foaming agent dispersion, 50% foaming aid dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion, 50% antioxidant DNP dispersion, and 50% talcum powder dispersion is the same as above; 20% sodium fluorosilicate dispersion: grind sodium fluorosilicate powder in a mortar, add water, and then adjust the pH value to 6 to obtain sodium fluorosilicate dispersion; (6) Add 50% sulfur dispersion, 50% accelerator dispersion, 50% zinc oxide dispersion, and 50% antioxidant dispersion to the latex, stirring while adding, stirring for 20-30 minutes after adding, and letting it stand for use; (7) The latex prepared in step (6) is allowed to stand for use and then stirred before use; ① adding 2% of a 50% foaming agent dispersion, then adding 50% of a foaming aid dispersion, and then 50% of a talcum powder dispersion in sequence, and after mixing evenly, adding 20% ​​of a sodium fluorosilicate dispersion and a loofah fiber, and then stirring to the gel point and then rapidly injecting and gelling to obtain a density of 45 kg / m 3 ② Add 3% of 50% foaming agent dispersion, then add 50% foaming aid dispersion, 50% talcum powder dispersion, mix well, add 20% sodium fluorosilicate dispersion and guar fiber, stir to gel point, then quickly inject and gel to obtain a density of 40kg / m 3 The foam material is used as the shoulder part of the pillow; (8) The mold is cleaned, preheated, coated with a release agent, and finally demolded to obtain the finished product.

2. The adaptive pressure relief multifunctional bed for the elderly according to claim 1, characterized in that: The round bamboo shrapnel (1211) on each of the unit row skeletons (121) is specifically a double-row round bamboo shrapnel (1211) with a two-layer or three-layer structure, and the two ends of the double-row round bamboo shrapnel (1211) with a two-layer or three-layer structure are matched with a pair of sleeves (1212) arranged opposite to each other; the inner side ends of the sleeves (1212) are respectively provided with two parallel hole grooves, and the opening height of the hole grooves corresponds to the thickness of the three-layer round bamboo shrapnel (1211), and the bottom ends of the two side walls of the hole grooves are respectively formed with a pair of dovetail grooves, and the dovetail grooves are matched with a separately provided pad (1212a) with a dovetail tenon.

3. The adaptive pressure relief multifunctional bed for the elderly according to claim 1, characterized in that: The foldable bed slat frame (12) is divided into a back support slat frame (12a), a hip support slat frame (12b), a leg support slat frame (12c) and a foot support slat frame (12d) in sequence along its longitudinal direction, and the back support slat frame (12a), the hip support slat frame (12b), the leg support slat frame (12c) and the foot support slat frame (12d) are hingedly connected to each other in pairs; wherein the bottom of the back support slat frame (12a) and the bottom of the leg support slat frame (12c) are respectively connected to a braking device, and the two are folded by the braking device (17).

4. The adaptive pressure relief multifunctional bed for the elderly according to claim 3, characterized in that: Each of the braking devices (17) comprises an electric metal push-pull rod (171), two fixing nuts (172), two arc-shaped slideways (173), a support plate (1731), a positioning rod (174) and a motor (175); wherein the positioning rod (174) is arranged transversely at the bottom of the back support row frame (12a) / leg support row frame (12c), the middle part of the positioning rod (174) is rotatably connected to the electric metal push-pull rod (171), and both ends of the positioning rod (174) are respectively fixedly connected to an arc-shaped slideway (173); The arc-shaped slideway (173) is bent upward to form a shape, and a support plate (1731) acting upward is connected to the top of one end of the arc-shaped slideway (173), and the support plate (1731) is fixedly connected to the back support row frame (12a) / leg support row frame (12c) above it; in addition, a slide rail is provided on the side of the arc-shaped slideway (173) away from the direction of the positioning rod (174), and a fixing nut (172) is slidably fitted in the slide rail; wherein the outer end of the fixing nut (172) is fixedly connected to the corresponding bed frame (11), and the inner end of the fixing nut (172) is movably connected to the slide rail; The front part of the electric metal push-pull rod (171) is a telescopic end, and the telescopic end is rotatably connected to the middle part of the positioning rod (174); the rear part of the electric metal push-pull rod (171) is connected to a motor (175), and the motor (175) is fixed on the cross brace (16); wherein, driven by the motor (175), the electric metal push-pull rod (171) drives the arc-shaped slideway (173) to slide on the fixing nut (172).

5. The adaptive pressure relief multifunctional bed for the elderly according to claim 3, characterized in that: The foldable bed also includes a positioning block (111), which is a metal groove-shaped block distributed at the intersection of the leg support slat frame (12c) and the foot support slat frame (12d) of the foldable bed slat frame (12), one side of the groove is fixed to the edge of the leg support slat frame (12c) by screws, and the side close to the foot support slat frame (12d) is not fixed.

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