Soft and hard adjustable bed and chair cushion and its adjustment method

Abstract

The present invention belongs to the technical field of bed and chair cushions, and relates to a bed and chair cushion with adjustable hardness and its adjustment method. Contact airbags capable of sensing whether they are flattened are arranged in a row on a support plate, and a comfort layer is laid on the contact airbags to form a mattress body. Each contact airbag is connected to an electromagnetic air valve correspondingly. An air pump is used to inflate the contact airbags, a gas pressure detector is used to detect the air pressure of the contact airbags, and an exhaust solenoid valve is used to exhaust the contact airbags. When a body movement of a human body is detected by a human body physiological detection device, the controller will make the air pressure device work, determine the positions of different regions of the human body, and adjust the air pressure of the contact airbags corresponding to different regions of the human body, so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed. This bed and chair cushion with adjustable hardness can adapt to the sleeping posture curve of the human body, make the supporting forces of different parts of the human body evenly distributed, and keep the lumbar spine in the position of the normal sleeping posture curve of the human body after long-term use. This bed and chair cushion with adjustable hardness has a simple structure, convenient operation and low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of bed and chair cushions, and relates to a bed and chair cushion with adjustable hardness and its adjustment method. Background Art

[0002] With the continuous improvement of people's requirements for the quality of life, the requirements for the comfort of bed and chair products have been further enhanced. The concept and market of private customization have also increased accordingly. The starting point of private customization in the bed and chair field is not only the superficial requirement that customers expect to be different. In fact, it is expected that the products they purchase can change with their height, weight, psychological and living habits. For example, when sleeping in bed, the previous habit was to lie flat, but recently, due to other reasons such as respiratory muscle relaxation causing poor breathing, the sleeping position has changed to lying on the side. If the habit during sleep is to lie flat, the thickness of the comfort layer of the mattress for the human body is mainly the support height at the lumbar arch position. If it is too much greater than this height, the buttocks will drop too much and the legs will instead curl up. An exaggerated description is like sleeping in a wok with a round bottom. In the long run, it will inevitably cause spinal deformation and lumbar spinal convexity lesions. However, if sleeping on the side, if the comfort layer still uses the thickness of the comfort layer for lying flat comfort, then the hip bone will touch the hard support layer inside the mattress due to insufficient thickness of the comfort layer and will be uncomfortable. At the same time, the waist will also not be able to fully support the side of the waist due to insufficient thickness of the comfort layer, causing the spine to bend downwards. In the long run, it will also cause spinal curvature deformation. Therefore, due to the immutable structural factors of the mattress, it is difficult to meet the various changing needs of users. So customers expect to obtain a truly customized private customized product that is really suitable for them. However, because the body structure ratio of each of us also changes over time, and the immutable structure of previous mattresses, even if the products customized at a certain stage cannot meet the real needs and expectations of customers due to their solid immutability.

[0003] Among mattress products, there is a water bed or air mattress. This kind of bed is actually a large soft container with only one cavity, which stores gas or liquid that can adjust the internal pressure. Apparently, when a person lies on it, the supporting force on different areas of the body should be evenly distributed. However, in fact, this kind of mattress only makes the supporting force on each part of the body the same while ignoring the straightness problem of the lumbar spine. This is related to the description above: "When lying flat is the habit, the thickness of the comfort support layer of the mattress for the human body is mainly the supporting height at the lumbar arch position. If it is too much greater than this height, it will cause the buttocks to drop too much and the legs to lift up. An exaggerated description is like sleeping in a round-bottomed pot. In the long run, it will inevitably deform the spine and cause lumbar spine convexity lesions." Therefore, it does not play any role in improving the straightness problem of the lumbar spine. Moreover, since this is a large soft container that needs to withstand a certain pressure, the materials used must ensure that they can withstand the internal and external pressure conditions. Therefore, the materials must have certain characteristics of resisting internal and external pressure. As a result, the surface close-fitting performance and comfort will be greatly reduced. And there is an even more serious problem, that is, if pressure is applied at any position on the mattress, it will quickly cause the person on the mattress to rise and fall and swing. This will cause the instability of the body balance during sleep or when the body turns over, stimulating the human sensory integration system in the resting state to enter the working state of limb balance. Especially when it is filled with liquid inside, it will be in an obvious irregular surging state, not only causing the body to rise and fall but also causing the body to swing irregularly from side to side. This situation is more stimulating to the human sensory integration system and directly affects the perceptual safety psychological state of sleep. That is what we often call sleeping restlessly. Of course, there is also a multi-cavity water bed or air mattress, which uses different pressures applied to the internal of different cavities to overcome the defects of the integral cavity structure. However, these are all pre-pressure settings before use and are not automatic adjustment devices in a slow state that is not perceived by the body's sensory integration system under full intelligence.

[0004] Upon further analysis, assuming that the pressure on the body surface is balanced when a person is suspended and lying in water, someone designed a water bed with a single-piece cavity. However, due to the elastic extension force of the external soft wrapping material, the person is like lying on a liquid surface with a surface tension greater than that of water. Although, on the surface, the supporting force on the body surface is uniform, in reality, the weight distribution of our human body is uneven. As mentioned above, the heavier parts will surely sink, such as the buttocks and shoulders, while the legs will lift up, similar to lying in an arc-shaped depression. Such a result is bound to affect our spinal bones. To prevent the buttocks and back from sinking and the legs from lifting up, the simplest method in this structure is to reduce the elasticity of the external soft wrapping material and install a height-limiting tension device inside to prevent upward deformation, thereby reducing the problem of the legs lifting up. However, due to the influence of the elasticity of the external soft wrapping material, the waist of the human body will still sink along with the sinking of the buttocks and cannot solve the problem of the supporting force of the waist. Therefore, later in the market, a design method with multiple cavities and different pressure controls for each cavity emerged to achieve a basically balanced support on the body surface. However, most of the airbags in this structure adopt a multi-point array grid area distribution combining cylindrical or square and hexagonal shapes. Therefore, there are many distribution points, many pressure sensing elements, complex program control, relatively high software and hardware costs, and it is also necessary to preset different pressures according to different human bodies to meet the actual purpose requirements, so the operation is also rather cumbersome. Summary of the Invention

[0005] The purpose of the present invention is to provide a bed chair cushion with adjustable softness and hardness to solve the technical problems that when using an existing mattress, due to the body posture curve of a human body, the supporting forces on different parts of the human body are different, causing discomfort in some areas, or after long-term use, it is difficult for the lumbar spine to maintain the position of the normal body posture curve, or the existing mattress has a complex structure due to a large number of pressure sensing elements.

[0006] An embodiment of the present invention provides a bed chair cushion with adjustable softness and hardness, including:

[0007] A mattress body, which includes a support plate, contact airbags arranged in sequence from the head of the bed to the tail of the bed on the support plate and capable of sensing whether they are flattened, and a comfort layer laid on the contact airbags;

[0008] A pneumatic device, which includes an air pump for providing pressurized gas to the contact airbags, electromagnetic air valves connected to the contact airbags one by one, a gas pressure detector connected to the interfaces of each electromagnetic air valve, and an exhaust solenoid valve connected to the gas pressure detector;

[0009] A human physiological detection device for detecting whether there is body movement of a human lying on the comfort layer; and

[0010] A controller is configured to operate the pneumatic device when the body movement is detected by the human physiological detection device to determine the positions of different regions of the human body and adjust the pressure of the contact airbags corresponding to different regions of the human body, so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed.

[0011] An embodiment of the present invention provides a method for adjusting a soft-hard adjustable bed chair cushion, which uses the above-mentioned soft-hard adjustable bed chair cushion and includes the following steps:

[0012] S10: Inflate all the contact airbags to the lower pressure threshold through the air pump, so that all the contact airbags are in an unflattened state, and close all the electromagnetic air valves;

[0013] S20: When the human physiological detection device detects body movement of a human body, inflate the contact airbags through the air pump, measure the pressure of the contact airbags by the gas pressure detector, and sequentially sense whether the contact airbags are flattened to determine the feet, waist, hips and back of the human body;

[0014] S30: Adjust the pressure of the contact airbags corresponding to different regions of the human body so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed; if the human physiological detection device detects body movement of the human body, perform step S20.

[0015] One or more of the above technical solutions in the soft-hard adjustable bed chair cushion and the method for adjusting the soft-hard adjustable bed chair cushion provided by the present invention have at least one of the following technical effects: The contact airbags capable of sensing whether they are flattened are arranged in the direction from the head of the bed to the end of the bed on the support plate, and a comfortable layer is laid on the contact airbags to form a mattress body. Each contact airbag is connected to an electromagnetic air valve, the air pump is used to inflate the contact airbags, the gas pressure detector is used to detect the air pressure of the contact airbags, and the exhaust solenoid valve is used to exhaust the contact airbags. When the human physiological detection device detects body movement of a human body, the controller will operate the pneumatic device to determine the positions of different regions of the human body and adjust the pressure of the contact airbags corresponding to different regions of the human body, so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed. The soft-hard adjustable bed chair cushion can adapt to the sleeping posture curve of the human body, make the supporting forces of different parts of the human body evenly distributed, and can also keep the lumbar spine in the position of the normal sleeping posture curve of the human body after long-term use, improving the comfort when lying down to sleep. The soft-hard adjustable bed chair cushion has a simple structure, is easy to operate, and has a low cost, avoiding the high cost situation of existing mattresses with more pressure sensing elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the soft-hard adjustable bed and chair cushion provided by the embodiment of the present invention when a person lies down. The dotted line is the air pipe.

[0018] Figure 2 It is a schematic arrangement diagram of the contact airbags applied in the soft-hard adjustable bed and chair cushion provided by the embodiment of the present invention. The solid line is the contact airbags that are not inflated and are arranged in an inclined and overlapping manner. The double-dot dash line is the contact airbag filled with gas.

[0019] Figure 3 For Figure 1 It is a schematic structural diagram of the contact airbag applied in the soft-hard adjustable bed and chair cushion.

[0020] Figure 4 (a), Figure 4 (b) are respectively schematic structural diagrams of the inner upper surface and the inner lower surface of the contact airbag.

[0021] Figure 5 (a), Figure 5 (b) are respectively schematic diagrams of the contact airbag in a flattened state and an unflattened state.

[0022] Figure 6 It is a schematic diagram of the support force partition of the support surface for different regions of the human body when the human body lies flat. In the figure, the main joints of the human body are simulated in a mechanical rotation point manner. Detailed implementation manners

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] Please refer to Figures 1 to 3 , embodiments of the present invention provide a soft and hard adjustable bed chair cushion, which can be applied to bed chair products and can also be used in fields such as spinal correction and body shaping in the medical field. The soft and hard adjustable bed chair cushion includes a mattress body 10, a pneumatic device 20, a human physiological detection device 30, and a controller 40. The mattress body 10 includes a support plate 11, contact airbags 12 arranged in sequence from the head of the bed to the tail of the bed on the support plate 11 and capable of sensing whether they are flattened, and a comfort layer 13 laid on the contact airbags 12. The pneumatic device 20 includes an air pump 21 for supplying pressurized gas to the contact airbags 12, electromagnetic air valves 22 connected to the contact airbags 12 one by one, a gas pressure detector 23 communicating with the interfaces of the respective electromagnetic air valves 22, and an exhaust solenoid valve 24 communicating with the gas pressure detector 23. The human physiological detection device 30 is used to detect whether there is body movement of the human body 1 lying on the comfort layer 13. The controller 40 is used to make the pneumatic device 20 work when the human physiological detection device 30 detects body movement to determine the positions of different regions of the human body 1 and adjust the pressure of the contact airbags 12 corresponding to different regions of the human body 1, so that the supporting forces of the contact airbags 12 on different regions of the human body 1 are evenly distributed.

[0028] When the human body physiological detection device 30 detects body movement of the human body 1, the controller 40 will make the pneumatic device 20 work to determine the positions of different regions of the human body 1 and adjust the pressure of the contact air bags 12 corresponding to different regions of the human body 1, so that the supporting forces of the contact air bags 12 on different regions of the human body 1 are evenly distributed. This adjustable soft-hard bed and chair cushion can adapt to the sleeping posture curve 1a of the human body, make the supporting forces of different parts of the human body 1 evenly distributed, and can also keep the lumbar spine in the position of the normal sleeping posture curve 1a of the human body after long-term use, improving the comfort during lying and sleeping. This adjustable soft-hard bed and chair cushion has a simple structure, convenient operation and low cost, avoiding the high cost caused by the existing mattress being equipped with more pressure sensing elements.

[0029] It should be noted that the human body physiological detection device 30 belongs to the prior art. In addition to detecting the vital signs of the human body 1, the human body physiological detection device 30 can also be used to detect the body movement of the human body 1 during sleep. For example, the existing Body Area Network (abbreviated as BAN in English and named Human Body Central Network in Chinese). According to each body movement of the human body 1, it triggers the automatic operation of the pneumatic device 20. By changing the pressure of each contact air bag 12, it realizes the re-acquisition of balanced and reasonable supporting forces with the change of body movement. Specifically, the human body physiological detection device 30 can be set at the position near the waist C of the comfort layer 13 to detect the vital signs and body movement of the human body 1.

[0030] In another embodiment of the present invention, the air pump 21 includes at least one micro air pump with constant air pressure. In order not to affect sleep, it should be changed as slowly and weakly as possible to avoid the human body 1 perceiving the change of its adjustment process. Therefore, there is no need for too fast inflation speed and flow rate. It is more appropriate to control it below 80L / minute, the pressure is controlled below 55KPA, and the noise value is less than 40 decibels. Specifically, the contact air bag 12, the exhaust solenoid valve 24, and the gas pressure detector 23 can be connected through a trachea 25.

[0031] In another embodiment of the present invention, the outlet of the air pump 21, the inlet of the exhaust solenoid valve 24, and the interface of the gas pressure detector 23 are connected by a tee 26. The air pump 21 is first connected to a port 26a of a tee 26, and then the second port 26b is connected to an exhaust solenoid valve 24, which is a normally closed solenoid valve and is used to open only when exhaust is required. The third port 26c of the tee 26 is connected to an electronic gas pressure detector 23, and then through this gas pressure detector 23, it is respectively connected to each electromagnetic air valve 22. By combining the switch states of any one of the exhaust solenoid valve 24 and the electromagnetic air valve 22, the inflation and deflation of each contact airbag 12 are realized. At the same time, through the gas pressure detector 23 at the outlet of the air pump 21, the internal air pressure in each contact airbag 12 is determined. By controlling the opening state of the exhaust solenoid valve 24, the inflation and pressurization or exhaust and decompression of the contact airbag 12 are adjusted. Thus, the pressure of a certain contact airbag 12 area in the mattress or the internal contact airbags 12 of the whole bed is changed, and functions such as softness and hardness adjustment are realized.

[0032] Please refer to Figure 3 、 Figure 5 In another embodiment of the present invention, the contact airbag 12 includes a strip-shaped airbag body 121, a first conductive part 122 installed on the inner upper surface of the airbag body 121, and a second conductive part 123 installed on the inner lower surface of the airbag body 121. The first conductive part 122 and the second conductive part 123 are used to sense that the airbag body 121 is flattened when the first conductive part 122 abuts against the second conductive part 123. This structure is easy to form and can sense whether the airbag body 121 is flattened. Refer to Figure 1 、 Figure 5 (b), after the air pump 21 inflates the airbag body 121, the airbag body 121 overcomes the external force, and the first conductive part 122 and the second conductive part 123 are separated so that the first conductive part 122 and the second conductive part 123 are not conducted, and the controller 40 obtains a signal indicating whether it has completely turned to the unflattened state. Refer to Figure 5 (a), when a sufficient large external force F acts on the surface of the airbag body 121, the upper and lower inner surfaces of the airbag body 121 will contact, and it is sensed through the contact and conduction of the first conductive part 122 and the second conductive part 123. When the conductive part is only in a single-contact mode, in cooperation with the gas pressure detector 23, it can be used to obtain the internal minimum pressure data acquisition at the moment when the airbag body 121 expands from the originally flattened state to the unflattened state after being filled with gas. Specifically, refer to Figure 3 The airbag body 121 is provided with an air nozzle 124 for connecting with the air pipe 25, which is easy to assemble and can realize the inflation and deflation of the airbag body 121.

[0033] Please refer to Figure 4, in another embodiment of the present invention, the first conductive part 122 is in a planar shape, and the second conductive part 123 includes at least two spaced strip-shaped conductive parts. This solution is easy to form, saves materials, and can reliably conduct electricity between the first conductive part 122 and the second conductive part 123 when the upper and lower inner surfaces of the airbag body 121 come into contact.

[0034] In another embodiment of the present invention, the first conductive part 122 and the second conductive part 123 can be made of conductive ink, conductive silver paste, conductive silver glue, mirror silver ink, graphene material or single-arm carbon nanotube aqueous slurry, and have good electrical conductivity. The inner surface of the airbag body 121 is coated with conductive materials over a large area or at multiple points as needed, or is made by pasting metal conductors on the inner wall of the airbag body 121.

[0035] Please refer to Figure 2 , Figure 3 , in another embodiment of the present invention, the length direction of the contact airbag 12 is perpendicular to the direction from the head of the bed to the foot of the bed, and the contact airbags 12 are arranged in an inclined and overlapping manner when not inflated. This solution is easy to arrange. The contact airbags 12 are arranged in an inclined and overlapping manner. After the contact airbags 12 are inflated, the center distance L between adjacent contact airbags 12 is relatively close, and more fulcrums are applied to the human body 1 within the same length range of the fulcrum of the human body 1, so it is more comfortable to use and can avoid the problem that the comfort is affected due to too large a distance between the airbags when the airbags become round after inflation. Specifically, the internal volumes of all the contact airbags 12 are equal and evenly distributed. After the contact airbags 12 are inflated, they can provide a supporting force for the human body 1 lying on the comfort layer 13. The cross-section of the contact airbag 12 can be square, trapezoidal, circular or other shapes.

[0036] Please refer to Figure 1 , Figure 3 , in another embodiment of the present invention, the first conductive part 122 and the second conductive part 123 are respectively led to the controller 40 by leads 125. This structure is easy to assemble, enabling the airbag body 121 to have the function of sensing whether it is flattened in a non-air-leaking state. When the airbag body 121 is inflated, the airbag body 121 overcomes the external force, and the first conductive part 122 and the second conductive part 123 start to gradually separate. By the on-off signals given to the controller 40 by the leads 125 respectively led from the first conductive part 122 and the second conductive part 123, the signal indicating whether it has been completely changed to the non-flattened state can be obtained.

[0037] Figure 6 It is a schematic diagram of the support force partition of the support surface for different regions of the human body when the human body is lying flat. Different regions of the human body are the head A, back B, waist C, buttocks D, knees E, and feet F respectively. The minimum pressure point between the head A and the back B is at the neck; the minimum pressure point between the back B and the buttocks D is at the waist C; the minimum pressure point between the buttocks D and the feet F is at the feet F, and the second minimum pressure point is at the knees E.

[0038] Please refer to Figure 1 and Figure 6 , in another embodiment of the present invention, a method for adjusting a soft-hard adjustable bed chair cushion is provided. The soft-hard adjustable bed chair cushion as described above is adopted, and the method includes the following steps:

[0039] S10. Inflate all the contact air bags 12 through the air pump 21 to the lower pressure threshold value, so that the contact air bags 12 are all in an unflattened state, and all the electromagnetic air valves 22 are closed. This step is the factory setting, which enables the internal area of the mattress body 10 to truly achieve an equal-pressure state of regional segmentation. At this time, the contact air bags 12 will all contain some gas and the interiors of the contact air bags 12 are all in an unflattened state, and the mattress body 10 is in a very soft state.

[0040] S20. After the mattress enters the family, the user turns on the machine. For example, the head A of the human body 1 is aligned with the head of the bed and the feet F are facing the end of the bed, and the user lies flat on the comfort layer 13. When the human body physiological detection device 30 detects body movement of the human body 1, for example, the action of getting into bed belongs to one kind of body movement. The contact air bags 12 are inflated through the air pump 21, the gas pressure detector 23 measures the pressure of the contact air bags 12, and it is successively sensed whether the contact air bags 12 are flattened, so as to determine the feet F, waist C, buttocks D and back B of the human body 1. After knowing the positions of different regions of the human body 1 corresponding to the contact air bags 12, it is convenient to perform the next step of adjusting the pressure of each contact air bag 12.

[0041] S30. Adjust the pressure of the contact air bags 12 corresponding to different regions of the human body 1, so that the supporting forces of the contact air bags 12 on different regions of the human body 1 are evenly distributed. During the sleep process, if the human body physiological detection device 30 is triggered by the body movement of the human body 1 again, step S20 will be performed again. During the adjustment process, if the human body physiological detection device 30 is triggered by the body movement of the human body 1 again, step S20 will start over until the end, and then the automatic adjustment is completed. At this time, the mattress will be in a static state waiting for the next trigger. Specifically, first exhaust the contact air bags 12 corresponding to the buttocks D and the back B, so that the above-mentioned contact air bags 12 are converted into a flattened state, and then adjust the pressure of the contact air bags 12 corresponding to different regions of the human body 1 respectively.

[0042] When the human body physiological detection device 30 detects body movement of the human body 1, the controller 40 will make the pneumatic device 20 work, determine the positions of different regions of the human body 1 and adjust the pressure of the contact air bags 12 corresponding to different regions of the human body 1, so that the supporting forces of the contact air bags 12 on different regions of the human body 1 are evenly distributed. The soft-hard adjustable bed chair cushion can adapt to the body posture curve 1a of the human body, make the supporting forces of different parts of the human body 1 evenly distributed, and can also keep the lumbar spine in the position of the normal body posture curve 1a of the human body after long-term use, improving the comfort during lying down and sleeping. The soft-hard adjustable bed chair cushion has a simple structure, convenient operation and low cost, avoiding the situation of high cost due to the existing mattress being equipped with more pressure sensing elements.

[0043] Please also refer to Figure 2 , in another embodiment of the present invention, in step S10, the air pump 21 is turned on and all the electromagnetic air valves 22 are opened to inflate all the contact air bags 12 so that all the contact air bags 12 are in an unflattened state. Since there is no interference from the weight of the human body 1 on the mattress body 10 at this time, the pressure that needs to be overcome for inflating the contact air bags 12 mainly comes from the weight of the comfort layer 13 material on the upper side of the contact air bags 12 and the tensile tension of the mattress fabric. Therefore, the influence of the weight of the human body 1 does not need to be considered. When the contact air bag 12 deforms, first, the contact air bag 12 will expand due to the inflow of gas, resulting in the contact air bag 12 turning into an unflattened state and being sensed.

[0044] After all the contact air bags 12 are sensed to be in an unflattened state, the measured pressure value is obtained by the gas pressure detector 23. When the measured pressure value is greater than or equal to the upper pressure threshold, the air pump 21 is turned off. Specifically, in the mattress industry, generally this upper pressure threshold will not be greater than 20 KPA. The reason is that the comfort layer 13 cannot use heavy materials. Therefore, the upper pressure threshold for all the contact air bags 12 can be set within 20 KPA.

[0045] The exhaust solenoid valve 24 is opened and closed once every predetermined time for exhaust and pressure measurement respectively until the measured pressure value is less than or equal to the lower pressure threshold, so that all the contact air bags 12 are in an unflattened state, all the electromagnetic air valves 22 are closed to stop exhaust, and a predetermined pressure is maintained. The exhaust solenoid valve 24 is in an open state for exhaust, and the exhaust solenoid valve 24 is in a closed state for detecting the internal pressure of the contact air bag 12 through the gas pressure detector 23 in a closed state. Specifically, the above-mentioned predetermined time can be 1 second to facilitate rapid and small-scale exhaust. The lower pressure threshold can be 0.3 KPA. This pressure value can make all the contact air bags 12 contain some gas and the interiors of all the contact air bags 12 are in an unflattened state, and the mattress body 10 is in a very soft state.

[0046] In another embodiment of the present invention, since there is still gas in the contact air bag 12 and the pressures of all the contact air bags 12 are in a state of being less than or equal to the lower pressure threshold, the feet F of the human body 1 will definitely be in a lifted state after lying down as Figure 6 the F point in. Step S20 includes the following steps:

[0047] S21. Determination of the position of the foot F: Perform the following pressure test steps on each contact airbag 12 from the foot of the bed towards the head of the bed until the measured pressure value of one of the contact airbags 12 remains greater than the lower pressure threshold. Then, this contact airbag 12 is the position of the foot F of the human body 1. The lower pressure threshold can be 0.3 KPA. For example, if the pressure of a certain contact airbag 12 is greater than the lower pressure threshold, it indicates that the contact airbag 12 here is under external pressure and should be at the position of the foot F. At this time, the pressure here needs to be recorded. Here, the measured pressure value of one of the contact airbags 12 remaining greater than the lower pressure threshold means that the measurement results of two or more times are that the measured pressure value is greater than the lower pressure threshold.

[0048] Among them, the pressure test steps include: opening the electromagnetic air valve 22 corresponding to a contact airbag 12, and detecting the measured pressure value of the corresponding contact airbag 12 by the gas pressure detector 23; opening and closing the exhaust solenoid valve 24 once every predetermined time for exhaust and pressure measurement respectively until the measured pressure value of this contact airbag 12 is less than the lower pressure threshold, to know that the foot F of the human body 1 does not press on this contact airbag 12. The pressure of the contact airbag 12 here is not recorded because it is less than the lower pressure threshold, and perform the pressure test steps on the next contact airbag 12 closer to the head of the bed. Specifically, the above-mentioned predetermined time can be 1 second, which is convenient for rapid and small-scale exhaust.

[0049] S22. Determination of the positions of the waist C, buttocks D and back B: Obtain the positions of the flattened contact airbags 12, and record the number of all contact airbags 12 in the flattened state. According to the human body sleeping posture curve 1a, the flattened contact airbags 12 are usually the buttocks D and the back B. The positions of different regions of the human body 1 on the comfort layer 13 can be analyzed based on the positions of the flattened contact airbags 12.

[0050] This solution is applicable to the situation where the back B, waist C and buttocks D of the human body 1 are all pressed on the comfort layer 13. If the flattened contact airbags 12 are arranged in sequence, open the electromagnetic air valves 22 corresponding to the flattened contact airbags 12, and simultaneously inflate the flattened contact airbags 12 by the air pump 21. When the contact airbags 12 turn into the non-flattened state, close the corresponding electromagnetic air valves 22 until all the contact airbags 12 turn into the non-flattened state; the first contact airbag 12 that turns into the non-flattened state is the position of the waist C, such as Figure 6 the middle area C between BD. Because whether the human waist C is lying flat, lying on the side or close to the comfort layer 13, the pressure on the comfort layer 13 is the smallest compared to the buttocks D and the back B. It can also be seen from the human body sleeping posture curve 1a that the position of the waist C is in a concave position with the smallest pressure. The penultimate contact airbag 12 that turns into the non-flattened state is the position of the buttocks D, such as Figure 6 point D. The last contact airbag 12 that turns into the non-flattened state is the position of the back B, such as Figure 6Point B. According to the mass distribution of different regions of the human body 1 and the body sleeping posture curve 1a, the region with the largest mass of the human body 1 is at the back B. The back B is one of the positions against the comfort layer 13 and is also the position with the greatest supporting force. The region with the second largest mass of the human body 1 is the buttocks D. The buttocks D is another position against the comfort layer 13 and is also the position with the second greatest supporting force.

[0051] This solution is applicable to the situation where the back B and the buttocks D of the human body 1 are pressed against the comfort layer 13, while the waist C is not pressed against the comfort layer 13. If the flattened contact airbags 12 are arranged in sequence and divided into two flattened regions, and there are non-flattened contact airbags 12 between the two flattened regions, then the non-flattened contact airbag 12 is at the position of the waist C; open the electromagnetic air valve 22 corresponding to the flattened contact airbag 12, and simultaneously inflate the flattened contact airbags 12 by the air pump 21. When the contact airbag 12 turns into a non-flattened state, close the corresponding electromagnetic air valve 22; the penultimate contact airbag 12 that turns into a non-flattened state is at the position of the buttocks D; the last contact airbag 12 that turns into a non-flattened state is at the position of the back B.

[0052] In another embodiment of the present invention, step S30 includes the step of adjusting the pressure of the contact airbags 12 corresponding to the region from the back B to the buttocks D:

[0053] Simultaneously inflate the contact airbags 12 corresponding to the region between the back B and the buttocks D and the first contact airbag 12 starting from the buttocks D towards the foot F, excluding the contact airbags 12 corresponding to the back B and the buttocks D, until the first contact airbag 12 starting from the buttocks D towards the foot F turns into a non-flattened state, and record the first pressure value of this contact airbag 12 when it turns into a non-flattened state;

[0054] Open the electromagnetic air valve 22 of the contact airbag 12 corresponding to the buttocks D, and simultaneously inflate the contact airbags 12 corresponding to the region between the back B and the buttocks D, the first contact airbag 12 starting from the buttocks D towards the foot F, and the contact airbag 12 corresponding to the buttocks D until the contact airbag 12 corresponding to the buttocks D turns into a non-flattened state, and close the electromagnetic air valve 22 of the contact airbag 12 corresponding to the buttocks D to maintain the pressure of the said contact airbag 12;

[0055] Exhaust the contact airbags 12 corresponding to the region between the back B and the buttocks D and the first contact airbag 12 starting from the buttocks D towards the foot F until the measured pressure value of this contact airbag 12 is equal to the first pressure value. Specifically, during the process of exhausting and measuring the pressure, it is necessary to close the air pump 21, and open and close the electromagnetic air valve 22 once every predetermined time for the alternating work of exhausting and measuring the pressure. The open state is used for exhausting, and the closed state is used for static measurement of the internal pressure of the contact airbag 12 by the gas pressure detector 23 in a sealed state; the above-mentioned predetermined time can be 1 second, which is convenient for exhausting a small amount of gas quickly.

[0056] Open the electromagnetic air valve 22 of the contact airbag 12 corresponding to the hip D for a predetermined time to instantaneously balance the pressure regulation; since the pressures of the respective contact airbags 12 are relatively close and the diameter of the air pipe 25 connected to the contact airbag 12 is small, true pressure balance of the respective contact airbags 12 cannot be achieved. The instantaneous pressure balance regulation is to allow the local high-pressure area to appropriately and smoothly balance the pressure to the low-pressure area in an appropriate amount, thereby increasing the comfort of the human body 1. Specifically, the above-mentioned predetermined time can be 0.5 seconds to facilitate quick and less exhaust.

[0057] Close the electromagnetic air valves 22 of the contact airbags 12 corresponding to the area between the back B and the hip D, the first contact airbag 12 where the hip D faces the foot F, and the contact airbag 12 corresponding to the hip D to maintain the pressure of each contact airbag 12. At this time, the adjustment of the support forces of the back B and the hip D is completed.

[0058] In another embodiment of the present invention, step S30 includes the step of regulating the pressure of the contact airbag 12 corresponding to the area from the head A to the back B:

[0059] Inflate the contact airbags 12 corresponding to the area between the head A and the back B simultaneously, excluding the contact airbag 12 corresponding to the back B, until all the contact airbags 12 corresponding to the area between the head A and the back B are converted to the non-flattened state, and record the second pressure value of the contact airbag 12 when it is converted to the non-flattened state;

[0060] Open the electromagnetic air valve 22 of the contact airbag 12 corresponding to the back B, and inflate the contact airbags 12 corresponding to the area between the head A and the back B and the contact airbag 12 corresponding to the back B simultaneously until the contact airbag 12 corresponding to the back B is converted to the non-flattened state, and then close the electromagnetic air valve 22 of the contact airbag 12 corresponding to the back B;

[0061] Exhaust the contact airbags 12 corresponding to the area between the head A and the back B until the measured pressure value of the contact airbag 12 is equal to the second pressure value;

[0062] Open the electromagnetic air valve 22 of the contact airbag 12 corresponding to the back B for a predetermined time to instantaneously balance the pressure regulation; the effect of the instantaneous pressure balance regulation is similar to that of the foregoing embodiment. Specifically, the above-mentioned predetermined time can be 0.5 seconds to facilitate quick and less exhaust.

[0063] Close the electromagnetic air valves 22 of the contact airbags 12 corresponding to the area between the head A and the back B and the contact airbag 12 corresponding to the back B to maintain the pressure of each contact airbag 12. At this time, the adjustment of the support forces from the head A to the back B is completed.

[0064] In another embodiment of the present invention, step S30 includes the step of regulating the pressure of the contact airbag 12 corresponding to the area from the hip D to the foot F:

[0065] Inflate the first contact airbag 12 from the hip D towards the foot F to the contact airbag 12 corresponding to the knee E until one of the contact airbags 12 changes to an uncompressed state, and record the third pressure value of the contact airbag 12 when it changes to the uncompressed state; wherein, the position of the knee E is approximately in the middle position between the foot F and the hip D, and the position of the knee E can be obtained by taking the average of the number of corresponding contact airbags 12 between the foot F and the hip D and then rounding. Inflate the first contact airbag 12 from the hip D towards the foot F to the contact airbag 12 corresponding to the knee E, and exhaust the air after the measured pressure value of the contact airbag 12 is greater than the third pressure value by a predetermined value until the measured pressure value of the contact airbag 12 is equal to the third pressure value; specifically, the predetermined value can be 10 KPA.

[0066] Open the electromagnetic air valve 22 of the first contact airbag 12 from the hip D towards the foot F to the contact airbag 12 corresponding to the foot F for a predetermined time to instantaneously balance the pressure regulation;

[0067] Close the electromagnetic air valve 22 of the first contact airbag 12 from the hip D towards the foot F to the contact airbag 12 corresponding to the foot F, and maintain the pressure of each contact airbag 12. At this time, the support force adjustment from the hip D to the foot F is completed.

[0068] As can be seen from the above principle, with the above adjustment method, it is not affected by the sleeping postures of the human body 1 such as lying flat, lying on the side, or curling up. Therefore, it is not necessary to detect the sleeping posture of the human body 1, and at the same time, it is not necessary to distinguish the grid areas of different levels of pressure of the human body 1 and the pressure sensing elements configured for each airbag. Only a few simple contact airbags 12, electromagnetic air valves 22, gas pressure detectors 23, and exhaust solenoid valves 24 have automatically analyzed and adjusted the pressure of the weight distribution area of the human body 1 on the bed surface, which is simpler. It is also not necessary to manually input relevant area control instructions and human body characteristic data.

[0069] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bed-chair cushion with adjustable softness and hardness, characterized in that, it includes: A mattress body, which includes a support plate, contact airbags arranged in sequence from the head of the bed to the tail of the bed on the support plate and capable of sensing whether they are flattened, and a comfort layer laid on the contact airbags; A pneumatic device, which includes an air pump for supplying pressurized gas to the contact airbags, electromagnetic air valves connected to the contact airbags one by one, a gas pressure detector connected to the interfaces of each electromagnetic air valve, and an exhaust solenoid valve connected to the gas pressure detector; A human physiological detection device for detecting whether there is body movement of a human lying on the comfort layer; and A controller for, when the human physiological detection device detects body movement, making the pneumatic device work to determine the positions of different regions of the human body and adjusting the pressure of the contact airbags corresponding to different regions of the human body, so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed; S10: Inflate all the contact airbags to the lower pressure threshold through the air pump, make all the contact airbags in an unflattened state, and close all the electromagnetic air valves; S20: When the human physiological detection device detects body movement of the human body, inflate the contact airbags through the air pump, the gas pressure detector measures the pressure of the contact airbags, and sequentially senses whether the contact airbags are flattened to determine the feet, waist, hips and back of the human body; S30: Adjust the pressure of the contact airbags corresponding to different regions of the human body so that the supporting forces of the contact airbags on different regions of the human body are evenly distributed; if the human physiological detection device detects body movement of the human body, then perform step S20; The step S20 includes the following steps: S21: Determination of the foot position: Perform the following pressure test steps on the contact airbags from the tail of the bed to the head of the bed one by one until the measured pressure value of one of the contact airbags remains greater than the lower pressure threshold, then the contact airbag is the foot position of the human body; Wherein, the pressure test step includes: opening the electromagnetic air valve corresponding to one contact airbag, and the gas pressure detector detects the measured pressure value of the corresponding contact airbag; opening and closing the exhaust solenoid valve once every predetermined time for exhaust and pressure measurement respectively until the measured pressure value of the contact airbag is less than the lower pressure threshold, knowing that the feet of the human body do not press on the contact airbag, and performing the pressure test step on the next contact airbag closer to the head of the bed; S22: Determination of the waist, hip and back positions: Know the positions of the flattened contact airbags; If the flattened contact airbags are arranged in sequence, open the electromagnetic air valves corresponding to the flattened contact airbags, and inflate the flattened contact airbags simultaneously by the air pump, and close the corresponding electromagnetic air valves when the contact airbags turn into an unflattened state; the first contact airbag to turn into an unflattened state is the waist position; the penultimate contact airbag to turn into an unflattened state is the hip position; the last contact airbag to turn into an unflattened state is the back position; If the compressed contact airbags are arranged in sequence and divided into two compressed areas, and there are uncompressed contact airbags between the two compressed areas, then the uncompressed contact airbag is in the waist position; open the electromagnetic air valve corresponding to the compressed contact airbag, and inflate the compressed contact airbag simultaneously by the air pump. When the contact airbag turns to the uncompressed state, close the corresponding electromagnetic air valve; the penultimate contact airbag that turns to the uncompressed state is in the hip position; the last contact airbag that turns to the uncompressed state is in the back position.

2. The soft-hard adjustable bed chair cushion according to claim 1, characterized in that the contact airbag includes an airbag body in a strip shape, a first conductive part installed on the inner upper surface of the airbag body, and a second conductive part installed on the inner lower surface of the airbag body. The first conductive part and the second conductive part are used to sense that the airbag body is compressed when the first conductive part abuts against the second conductive part.

3. The soft-hard adjustable bed chair cushion according to claim 2, characterized in that the length direction of the contact airbag is perpendicular to the direction from the head of the bed to the end of the bed, and the contact airbags are arranged in an inclined overlapping manner when not inflated.

4. The soft-hard adjustable bed chair cushion according to claim 1, characterized in that the outlet of the air pump, the inlet of the exhaust solenoid valve and the interface of the gas pressure detector are connected by a tee.

5. A method for adjusting a soft-hard adjustable bed chair cushion, characterized in that it uses the soft-hard adjustable bed chair cushion according to any one of claims 1 to 4, and includes the following steps: S10. Inflate all the contact airbags to the lower pressure threshold by the air pump, so that all the contact airbags are in an uncompressed state, and close all the electromagnetic air valves; S20. When the human body physiological detection device detects human body movement, inflate the contact airbags by the air pump, the gas pressure detector measures the pressure of the contact airbags, and sequentially senses whether the contact airbags are compressed to determine the feet, waist, hips and back of the human body; S30. Adjust the pressure of the contact airbags corresponding to different areas of the human body so that the supporting forces of the contact airbags on different areas of the human body are evenly distributed; if the human body physiological detection device detects human body movement, then perform step S20; The step S20 includes the following steps: S21. Determination of the foot position: Perform the following pressure test steps on the contact airbags from the end of the bed to the head of the bed one by one until the measured pressure value of one of the contact airbags remains greater than the lower pressure threshold, then the contact airbag is the foot position of the human body; Wherein, the pressure test step includes: opening the electromagnetic air valve corresponding to one contact airbag, and the gas pressure detector detects the measured pressure value of the corresponding contact airbag; open and close the exhaust solenoid valve once every predetermined time for exhaust and pressure measurement respectively until the measured pressure value of the contact airbag is less than the lower pressure threshold, and it is known that the human foot does not press on the contact airbag, and perform the pressure test step on the next contact airbag close to the head of the bed; S22. Determination of the positions of the waist, hip and back: Obtain the positions of the flattened contact airbags; If the flattened contact airbags are arranged in sequence, open the electromagnetic air valves corresponding to the flattened contact airbags, and simultaneously inflate the flattened contact airbags by the air pump. When the contact airbags turn to the non-flattened state, close the corresponding electromagnetic air valves; The first contact airbag to turn to the non-flattened state is the waist position; The second last contact airbag to turn to the non-flattened state is the hip position; The last contact airbag to turn to the non-flattened state is the back position; If the flattened contact airbags are arranged in sequence and divided into two flattened areas, and there are non-flattened contact airbags between the two flattened areas, then the non-flattened contact airbag is the waist position; Open the electromagnetic air valves corresponding to the flattened contact airbags, and simultaneously inflate the flattened contact airbags by the air pump. When the contact airbags turn to the non-flattened state, close the corresponding electromagnetic air valves; The second last contact airbag to turn to the non-flattened state is the hip position; The last contact airbag to turn to the non-flattened state is the back position.

6. The adjustable soft and hard bed chair cushion adjusting method according to claim 5, characterized in that In step S10, inflate all the contact airbags so that all the contact airbags are in the non-flattened state, and obtain the measured pressure value by the gas pressure detector; When the measured pressure value is greater than or equal to the upper pressure threshold, close the air pump, open and close the exhaust solenoid valve at a predetermined time interval for exhaust and pressure measurement respectively until the measured pressure value is less than or equal to the lower pressure threshold, so that all the contact airbags are in the non-flattened state, and close all the electromagnetic air valves to stop exhaust.

7. The adjustable soft and hard bed chair cushion adjusting method according to claim 5, characterized in that The step S30 includes the step of adjusting the pressure of the contact airbags corresponding to the back to hip region: Simultaneously inflate the contact airbags corresponding to the region between the back and the hip and the first contact airbag starting from the hip towards the foot until the first contact airbag starting from the hip towards the foot turns to the non-flattened state, and record the first pressure value when the contact airbag turns to the non-flattened state; Open the electromagnetic air valve of the contact airbag corresponding to the hip, and simultaneously inflate the contact airbags corresponding to the region between the back and the hip, the first contact airbag starting from the hip towards the foot and the contact airbag corresponding to the hip until the contact airbag corresponding to the hip turns to the non-flattened state, and close the electromagnetic air valve of the contact airbag corresponding to the hip; Exhaust the contact airbags corresponding to the region between the back and the hip and the first contact airbag starting from the hip towards the foot until the measured pressure value of the contact airbag is equal to the first pressure value; Open the electromagnetic air valve of the contact airbag corresponding to the hip for a predetermined time to instantaneously balance the pressure regulation; Close the electromagnetic air valves of the contact airbag corresponding to the area between the back and the buttocks, the first contact airbag starting from the buttocks towards the feet, and the contact airbag corresponding to the buttocks.

8. The adjustable soft and hard bed cushion adjusting method according to claim 5, characterized in that, the step S30 includes the step of adjusting the pressure of the contact airbag corresponding to the area from the head to the back: Inflate the contact airbags corresponding to the area between the head and the back simultaneously until all the contact airbags corresponding to the area between the head and the back are converted to the non-flattened state, and record the second pressure value of the contact airbags when they are converted to the non-flattened state; Open the electromagnetic air valve of the contact airbag corresponding to the back, and inflate the contact airbags corresponding to the area between the head and the back and the contact airbag corresponding to the back simultaneously until the contact airbag corresponding to the back is converted to the non-flattened state, and then close the electromagnetic air valve of the contact airbag corresponding to the back; Exhaust the contact airbags corresponding to the area between the head and the back until the measured pressure value of the contact airbags is equal to the second pressure value; Open the electromagnetic air valve of the contact airbag corresponding to the back for a predetermined time to instantaneously balance the pressure adjustment; Close the electromagnetic air valves of the contact airbags corresponding to the area between the head and the back and the contact airbag corresponding to the back.

9. The adjustable soft and hard bed cushion adjusting method according to claim 5, characterized in that, the step S30 includes the step of adjusting the pressure of the contact airbag corresponding to the area from the buttocks to the feet: Inflate the first contact airbag starting from the buttocks towards the feet to the contact airbag corresponding to the knee until one of the contact airbags is converted to the non-flattened state, and record the third pressure value of the contact airbag when it is converted to the non-flattened state; Inflate the first contact airbag starting from the buttocks towards the feet to the contact airbag corresponding to the knee, and exhaust the air after the measured pressure value of the contact airbag is greater than the third pressure value by a predetermined value until the measured pressure value of the contact airbag is equal to the third pressure value; Open the electromagnetic air valves of the first contact airbag starting from the buttocks towards the feet to the contact airbag corresponding to the feet for a predetermined time to instantaneously balance the pressure adjustment; Close the electromagnetic air valves of the first contact airbag starting from the buttocks towards the feet to the contact airbag corresponding to the feet.

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