JP2006296640A - Cell structure for cushion and cushion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushion capable of preventing the development of compression disorder in the buttocks caused by keeping a sitting posture for a long period of time. <P>SOLUTION: This cushion is provided with a plurality of cell structure bodies 1 as a cushion material. The cell structure body 1 is provided with an inside cell 2 filled with air, and an outside cell storing the inside cell 2 and filled with gel. These cell structures 1 can disperse the body pressure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cell structure used as a cushion material and a cushion using the same.

  A general wheelchair has a seat (cloth) configured so that it can be folded. When sitting on a wheelchair having such a seating surface for a long time, there is a problem that blood circulation in the buttocks is disturbed, numb, or severe, which may cause itching. Such a compression disorder occurs due to excessive body pressure acting particularly on the hip bone portion of the buttocks. Therefore, various cushions that can disperse body pressure when sitting are proposed, and conventionally known ones are as follows. For example, there is a cushion in which one large bag member is filled with air and a cushion in which one large bag member is filled with gel (for example, Patent Document 1). In addition to the seating surface portion of the wheelchair, such a compression disorder may occur in a portion of the bed where a large body pressure acts, such as a waist portion, and a cushion is provided also in such a portion.

JP-A-9-154672 (FIG. 3)

  A conventional cushion filled only with air is strong in resilience, so it does not sink when sitting, and body pressure distribution is not performed well. Furthermore, adjustment of the amount of air is necessary and is troublesome. The cushion filled with only the gel is largely deformed because the gel flows greatly inside the cushion, and the action of returning to the original state is small. As a result, when the buttock is seated in a state where it is tilted to the left and right (incorrect posture), the cushion holds the posture as it is, and there is a problem that the posture is deteriorated. Furthermore, the cushion made of only gel is easy to sink when sitting, and the gel escapes and disappears in the high body pressure part (the part corresponding to the sciatic bone) while sitting, and the part where the body pressure increases directly contacts the seating surface. It will be in a state (bottomed state). There is a problem that the body pressure remains high when the bottom is reached.

  Therefore, the present invention has been made in view of the above-described problems, and can prevent occurrence of a compression disorder in the buttocks due to a sitting posture for a long time, and to obtain a comfortable cushion. The purpose is to provide a new means.

To achieve the above object, the cell structure for cushion of the present invention comprises an internal cell filled with air and an external cell containing the internal cell and filled with gel. It is characterized by.
When the cell structure having such a configuration is used as a cushioning material, the cell structure is deformed by the gel flowing when body pressure acts on the cell structure, and the cell structure disperses the body pressure. Thereby, it can prevent that a big body pressure arises locally. And since the internal cell filled with air exists in the external cell as the core member, the cell structure is prevented from being crushed, and the portion where the body pressure is increased is in direct contact with the seating surface. It is possible to prevent the situation from becoming a state (bottomed state). In other words, this cell structure has a function to disperse body pressure by deforming the external cell so that it conforms to the shape of the body by the flow of the gel, and even if the deformation occurs in the external cell, A shape-retaining function for retaining the shape so that the external cell does not deform too much is provided.

  Further, the outer cell has a deformable outer bag member enclosing the inner cell and the gel, and an outer periphery having a smaller surface friction resistance than the outer bag member on the outer peripheral side of the outer bag member. A member is preferably provided. Since the external cell becomes deformable when subjected to body pressure, when the external bag member enclosing the gel is made of a deformable material such as rubber or resin, the surface of the external bag member is Particularly in the case of rubber, the frictional resistance is increased. If a cushion is configured by arranging a plurality of cell structures, the frictional resistance between the cell structures is large, and the degree of freedom of deformation in the entire cushion may be reduced. However, since the outer peripheral member is provided, the contact between the adjacent cell structures becomes a contact between the outer peripheral members having a small frictional resistance, the mutual sliding is improved and the cushion as a whole is easily deformed, and is supple. It becomes a cushion.

  The gel is preferably filled in the external cell together with the far-infrared emitting material. The gel in the external cell may make you feel cold when sitting, and may also take away the body temperature of the sitting person, but this structure makes the cell structure feel warm by the action of far infrared radiation Can do.

  Moreover, it is preferable that two or more of the internal cells are accommodated in the external cell. According to this configuration, since the internal cell easily moves in the external cell, the external cell is easily deformed even if the content ratio of air (internal cell) is increased, and the action of dispersing body pressure is enhanced. And since the gel intervenes between the inner cells, the inner cells that are in contact with each other can be moved smoothly, and the outer cells can be deformed flexibly.

  In addition, a cushion using such a cushion cell structure includes a plurality of the cell structures and a comprehensive member in which the cell structures that are independent from each other are integrated. Can be configured. According to this, the cell structures that are independent of each other are integrated by the covering member, and the cushion becomes easy to handle. Further, the size of the cushion can be freely changed by changing the number of cell structures.

In this cushion, the cell structure is preferably composed of at least two types, and the combination of the cell structures can be freely performed in one cushion.
Specifically, a small cell structure having a small overall shape is provided in a portion where the body pressure increases, and a large cell structure having a larger overall shape than the small cell structure is provided in a portion where the body pressure decreases. Preferably it is provided. As a result, by providing a small cell structure in the part where body pressure is high, the number of cell structures in that part can be increased, and it becomes possible to fit these cell structures along the body, and body pressure dispersion Function increases. On the other hand, by providing a large cell structure in the part where the body pressure is low, it is possible to hold the buttocks that increase the body pressure and stabilize the posture, and the body swings and slips on the cushion Can be suppressed.

  According to the present invention, body pressure distribution is performed well, and it is possible to reduce the burden on the user who spends sitting posture for a long time.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a schematic configuration of a cushion according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a schematic configuration of a cell structure used for the cushion. In addition, FIG. 1 has shown the state which cut | disconnected the bag-shaped cover material 9 which comprises the outermost part of the cushion on the way. This cushion can be applied to a place where a user's body comes into contact with a body support surface such as a chair or a bed to generate body pressure, and the body pressure needs to be dispersed. For example, it can be used by laying on the seat surface of a wheelchair or by laying on the upper surface of a bed. Hereinafter, a case where the cushion is placed on the seat surface will be described.

  First, the cell structure 1 will be described with reference to FIG. 2. The cell structure 1 includes an internal cell 2 filled with air a, and an external that contains the internal cell 2 and is filled with gel g. Cell 3. The internal cell 2 has an internal bag member 10, and the internal bag member 10 encloses (seals) air a. The outer cell 3 has an outer bag member 4, and the outer bag member 4 encloses (seals) the gel g together with the inner cell 2.

  The internal bag member 10 that is the bag portion of the internal cell 2 is made of, for example, a resin film. The shape of the inner bag member 10 may be a prism or a pyramid other than the spherical shape shown in the figure, and may be a three-dimensional shape (triangular pyramid shape) in which four surfaces are formed of triangular surfaces, although not shown. When the inner bag member 10 is a pyramid (particularly a triangular pyramid shape), it is easier to assemble and seal the air a inside than a spherical shape, and the manufacture is simplified.

The outer bag member 4 which is the bag portion of the outer cell 3 can be easily deformed with the flow of the internal gel g when an external force (body pressure) is applied. More specifically, the outer bag member 4 itself is made of a stretchable (for example, rubber) film member, and deforms while increasing the total circumferential surface area of the outer bag member 4 as the gel g flows inside. It is supposed to be possible. In this case, when a person sits on the cushion having the cell structure 1 and the cell structure 1 is deformed, and then changes the posture of the person sitting or standing, the elastic restoring force of the external bag member 4 The cell structure 1 can be automatically restored to the original shape before deformation.
In addition, as the other material of the outer bag member 4, the material itself is poor in elasticity, but when the gel g is filled in the outer bag member 4 with slackness, the shape of the inner bag g flows. The material can be easily changed. That is, it can be made into the bag-shaped thing comprised from the resin-made films.
The shape of the deformable outer bag member 4 can be a cylinder or a prism as well as a sphere as shown.

  Further, as shown in FIG. 2, an outer peripheral member 5 is provided on the outer peripheral side of the outer bag member 4. The outer peripheral member 5 is provided so as to cover the entire outer peripheral surface of the outer cell 3 (outer bag member 4). The outer peripheral member 5 is made of a material having a lower surface frictional resistance than the outer bag member 4. This is because when the external bag member 4 enclosing the gel g is made of rubber in order to make the external cell 3 deformable, the surface thereof has a large frictional resistance. If the cushion is formed by arranging a plurality of cell structures 1 having the outermost outer rubber surface 4 arranged side by side, the friction between the adjacent cell structures 1 increases, and the entire cushion is deformed. The degree of freedom may be reduced. However, according to the outer peripheral member 5, the contact between the adjacent external cells 3 becomes a contact between the outer peripheral members 5 having a small frictional resistance, the mutual sliding is improved and the cushion as a whole is easily deformed. it can.

The outer peripheral member 5 is preferably made of a material having better air permeability and a material having better moisture permeability. This can prevent the humidity from becoming high, and can be a cushion that does not easily cause stuffiness. Furthermore, it is preferable that the outer peripheral member 5 is made of a material and a structure that are difficult to permeate the gel g in the outer cell 3 (waterproof). Thereby, even if the outer bag member 4 is torn and the gel g leaks, the outer peripheral member 5 can prevent the gel g from leaking to the outside.
As the outer peripheral member 5 excellent in moisture permeability, breathability and waterproofness, for example, there is a layered combination of a microporous resin film (microporous polyolefin film) and a non-woven fabric (Excelpole). (Registered trademark) manufactured by Mitsubishi Plastics, Inc.

As the gel g in the external cell 3, a known material used as a cushioning material can be adopted. For example, silicon gel or urethane gel can be used to reduce the manufacturing cost and have good body pressure dispersion performance. And can.
Further, the outer cell 3 is filled with a far infrared radiation material together with the gel g. As the far-infrared radiation material, conventionally known materials can be used, and examples thereof include ceramics such as transition metal element oxides, nitrides, and carbides, natural ores, natural carbides, activated water, and the like. .
Examples of the ceramic include titanium oxide (example: TiO, TiO ₂ ), silicon oxide (example: SiO ₂ ), zirconia oxide (example: ZrO ₂ ), aluminum oxide (example: Al ₂ O ₃ ), magnesium. Oxides (eg: MgO), barium oxides (eg: BaO), manganese oxides (eg: MnO ₂ ), iron oxides (eg: FeO, Fe ₂ O ₃ ), zirconia silicates (eg: ZrSiO ₂ ) , Cobalt oxide (example: CoO), copper oxide (example: CuO), chromium oxide (example: CrO ₃ ), titanium nitride (example: TiN), zirconia carbide (example: ZrC), titanium carbide (example) : TiC), tin oxide (e.g., SnO ₂ ) and other metal oxides, fine particles of nitride and carbide, and oxides of rare earth metals such as neodymium, lanthanum and yttrium. Examples of natural ores include mica, trimarine (tourmaline), and aurastone. Examples of natural carbides include those obtained by carbonizing seaweed into fine powder, charcoal represented by Bincho charcoal, carbon black, carbon fiber, and the like. Two or more of these may be used in combination.

  The capacity (volume) of the gel g in one cell structure 1 will be described. The capacity of the gel g is preferably 30% or more of the volume of the outer bag member 4 (the volume in a free state before deformation), more preferably. Is 50% or more. Further, the capacity is preferably 80% or less, and more preferably 70% or less. When the volume of the gel g is less than 30%, it becomes the same state as a cushion made only of air, the resilience is increased, and the body pressure dispersion action may be reduced. Moreover, when the capacity | capacitance of the gel g exceeds 80%, there exists a possibility that a cushion may become heavy.

The shape of the cell structure 1 can be a columnar shape as in the cushion shown in FIGS. 8 and 10 in addition to the spherical shape as shown in FIG. When the cell structure 1 has a spherical shape, the diameter is about 2 cm to 5 cm. When the cell structure 1 is enlarged, the external cell 3 (external bag member 4) in which the gel g is enclosed is enlarged, and at the same time, the internal cell 2 (internal bag member 10) in which the air a is enclosed is enlarged. However, it is preferable to increase the number of the internal cells 2. That is, in FIG. 2, one internal cell 2 is accommodated in one external cell 3, but two or more internal cells 2 are accommodated in one external cell 3 although not shown. Is preferred. This is because a large number of internal cells 2 of one type are manufactured in advance as standard products, and the number of internal cells 2 is changed according to the size of the cell structure 1 to manufacture the cell structure 1. This is because the manufacturing cost can be reduced and the cell structure 1 with abundant variations can be easily obtained.
In addition, the shape of the cell structure 1 can be hemispherical. That is, the outer cell 3 (outer bag member 4) may be configured to be a bag having a circular bottom surface and a hemispherical circumferential surface and top surface. Thereby, since the bottom surface is flat, the cell structure 1 is stable, and a cushion with less deformation can be formed. Even in this case, the shape of the internal cell 2 is arbitrary.

  Even when the size of the cell structure 1 is not changed (not increased), two or more internal cells 2 can be accommodated in the external cell 3. In this case, the internal cell 2 is easy to move in the external cell 3. Thereby, the deformation of the external cell 3 is likely to occur, and the body pressure dispersing action is enhanced. Moreover, even if the internal cell 2 moves, the entire cell structure 1 can be prevented from being crushed by the external cell 3. And since the gel g intervenes between the internal cells 2, the internal cells 2 in contact with each other can move smoothly, and the external cells 3 are easily deformed.

Next, a cushion having a plurality of cell structures 1 as described above will be described with reference to FIG. 1. This cushion is composed of a plurality of cell structures 1 that are independent from each other, and these cell structures 1. And a packaging member 6 that is gathered together. And the cushion of this invention is provided with the cell structure 1 in the part corresponding to a collar part at least.
The packaging member 6 includes a base material 8 for fixing the cell structure 1 and a bag-like cover material 9 that wraps the cell structure 1 and the base material 8.

  FIG. 3 is a plan view showing the first embodiment of the cushion, and FIG. 4 is a cross-sectional view of the cushion cut in the front-rear direction. The cover material 9 is indicated by a two-dot chain line. The base material 8 is made of a foamed resin body such as foamed polyurethane and has elasticity, and can function as a cushion material together with the cell structure 1. The base material 8 has a thick portion 13 having a large thickness for receiving a body pressure as a cushion portion and a thin portion 14 having a small thickness for placing the cell structure 1 thereon. The thick portion 13 is a portion having the same thickness as the diameter of the (largest) cell structure 1. The upper surface of the thin portion 14 is a mounting surface on which the cell structure 1 is mounted, and an inclined side wall surface 15 is provided between the mounting surface and the upper surface (body pressure receiving surface) 13a of the thick portion 13. It is said that. And the accommodation part 12 for accommodating the cell structure 1 is comprised by the said mounting surface and the said side wall surface 15. As shown in FIG. In addition, the said inclined side wall surface 15 is a surface which inclines so that the accommodating part 12 may spread upwards. By making the side wall surface 15 in such an inclined shape, it is difficult to feel a difference due to the boundary with the thick portion 13 when sitting.

  In the cushion of FIG. 3, the front portion is a thick portion 13 of the base material 8, and the rear portion is a cell group 11 in which a plurality of cell structures 1 are arranged in a plane. In the present invention, “front” is the side close to the knee when sitting on the cushion, and “rear” is the side corresponding to the buttocks.

  The cover material 9 is a bag-like member having an opening 9a, and the opening 9a is provided on the rear side of the cushion. The opening 9a is provided with a sealing member (not shown) for sealing the opening 9a. Examples of the sealing member include a fastener, a hook-and-loop fastener, and a button. The opening 9a of the cover material 9 can be one side of the rear side of the cushion or a part of the side continuous with the side. Thereby, since the cell structure 1 exists in the vicinity of the opening 9a when the sealing member is opened, the cell structure 1 can be easily replaced or stuffed. The cover material 9 is made of a cloth having good moisture permeability.

  FIG. 5 is a plan view showing a second embodiment of the cushion, in which a plurality of cell structures 1 are provided in the rear central region corresponding to the heel part, and the thick part 13 of the base material 8 is the front part. It is provided on both the left and right sides. The base material 8 can function as a frame material for the cushion. FIG. 6 is a cross-sectional view of the cushion when cut in the left-right direction. According to FIGS. 4 and 6 showing the cross-section of the cushion, the base material 8 has three inclined surfaces on the side. A wall surface 15 is formed, and the accommodating portion 12 is formed between them.

FIG. 7 is a plan view showing a third embodiment of the cushion, and the base material 8 has the same configuration as that of the first embodiment, but the cell group 11 has two types of large and small sizes as a whole. A cell structure 1 is provided.
More specifically, a large cell structure 1 having a large overall shape is provided on both the left and right sides of the cell group 11, and a small cell structure 1 having a smaller overall shape is provided at the central portion therebetween. Is provided. In this case, the small cell structure 1 is provided in the central portion where the body pressure increases when sitting, and the large cell structure 1 is provided on both the left and right sides where the body pressure decreases. According to this configuration, in the portion where the body pressure becomes high, the cell aggregate composed of the small cell structures 1 can be complicatedly deformed along the body shape (buttock), and the body pressure dispersion action is enhanced. And by providing the large cell structure 1 in the part where the body pressure is low, it becomes possible for the large cell structure 1 to hold the buttocks from both sides, to stabilize the posture, to shake the body, Slip in can be suppressed.

As the case where the cell structure 1 is composed of at least two types, the case where the size of the cell structure 1 itself is different has been described in FIG. 7, but although not shown, the size of the internal cell 2 is set to 2 It may be one or more types or two or more types with different numbers of internal cells 2. In this case, the size of the cell structure 1 is made the same and the ratio of the gel g to the air a is made different. The size of the cell structure 1 is also made different so that the ratio of the gel g to the air a is changed. What was made the same, what made the size of the cell structure 1 different, and made the ratio of the gel g and the air a each differ may be used.
By changing the size or number of internal cells 2, that is, the content of air a in one cell structure 1, the characteristics of the cell structure 1 can be changed to correspond to the magnitude of the acting body pressure. be able to. For example, when cell structures 1 having large internal cells 2 are disposed on both left and right sides of the cushion, it becomes easy for the cell structure 1 to hold the buttocks from both sides, stabilize the posture, shake the body, cushion Slip on the top can be suppressed.
In addition, the ratio of the gel g to the air a (g / a) is increased at a portion where the body pressure is high, and the portion where the body pressure is low is decreased, thereby providing a cushion with a high body pressure dispersion action by the gel g. Is obtained.

  FIG. 8 is a plan view showing a fourth embodiment of the cushion. The base material 8 of this cushion is not made of the foamed resin body having the thick portion 13 as described above, but the thin portion 14. It is set as the base material 8 which consists only of. And instead of the thick part 13 of the base material 8 which functioned as a frame member in 2nd Embodiment (FIG. 5), it is set as the cell structure 1 comprised in the column shape in FIG. In other words, this cushion has a columnar cell structure 1 disposed on each of the left and right sides and the front part to form a U-shape as a whole, and a plurality of spherical cell structures 1 are arranged with a storage portion 12 therebetween. Has been established. The columnar cell structure 1 and the spherical cell structure 1 are mounted and fixed on the base material 8 including only the thin portion 14. Further, as shown in FIG. 8, the columnar cell structure 1 includes two to three internal cells 2 in one external cell 3.

FIG. 9 is a plan view showing a fifth embodiment of the cushion, and the base material 8 of this cushion is a base material 8 consisting of only a thin portion 14 as in the fourth embodiment (FIG. 8). . The cell structure 1, which is entirely spherical, is placed and fixed on the base material 8. This cushion has a large cell structure 1 on both the left and right sides, and a small cell structure 1 between them.
Further, FIG. 10 is a plan view showing a sixth embodiment of the cushion. Instead of the spherical cell structure 1 of FIG. 9, all the column-shaped cell structures 1 are arranged, and the cell structures 1 are arranged. The rectangular cushion is comprised by arrange | positioning. In the fourth to sixth embodiments (FIGS. 8 to 10), the cell structure 1 is disposed on the entire surface of the cushion.

The manufacturing method of the cushion in each of the above embodiments will be described. A plurality of the cell structures 1 are attached to the base material 8 and the cell structure 1 and the base material 8 are integrated, and then the cell structure 1 and the base material are combined. 8 is put into the cover material 9 from the opening 9a of the bag-like cover material 9, and the cushion is obtained by closing the opening 9a. According to this manufacturing method, the plurality of cell structures 1 can be prevented from being separated, and the manufacturing is simplified.
Although a method for integrating the base material 8 and the cell structure 1 is not shown, for example, a first member of the surface fastener is provided at a predetermined position of the base material 8, and the first member is provided in each cell structure 1. The cell structure 1 can be fixed to the base material 8 by providing the second member of the hook-and-loop fastener corresponding to the above. This facilitates the replacement of the cell structure 1 later.

  As another method for manufacturing the cushion, the body pressure distribution state of the user is measured, and a cell structure having appropriate characteristics is selected according to the body pressure distribution, and is provided in combination while being adjusted. There is a way. That is, various types of cell structures having different sizes depending on the body pressure distribution from the opening 9a of the cover material 9 to the bag-shaped cover material 9 in which the base material 8 is put in advance. In this method, an arbitrary cell structure 1 is selected from 1. According to this method, the cell structure 1 can be incorporated while being exchanged, and a cushion suitable for each user can be manufactured. In the case of this manufacturing method, as shown in FIG. 4, in the cushion in which the thick portion 13 of the base material 8 is present at the front portion and the cell group 11 is disposed at the rear portion, the rear portion is the opening portion 9 a of the cover material 9. By doing so, the replacement | exchange operation | work of the cell structure 1 becomes easy.

In each embodiment of the cushion of the present invention, for example, as shown in FIGS. 1, 4 and 6, a surface having far infrared radiation performance on the body pressure receiving surface side (upper surface side) of the cell group 11 A pad 7 is provided. The planar pad 7 is a thin sheet having a contour substantially the same as the contour of the cushion, and also functions as a lid member for the cell structure 1 accommodated in the accommodating portion 12.
The planar pad 7 includes a fiber containing a far infrared radiation material. The far-infrared radiation material can be the same as that enclosed with the gel g in the outer cell 3 of the cell structure 1. For example, the planar pad 7 is made of a fiber containing natural stone (sansengoku powder). It can be used (Yumeron Kurokawa Co., Ltd., Patent No. 2990689).
As a result, the gel in the outer cell 3 of the cell structure 1 may feel cold when sitting or take the body temperature of the sitting person, but by the far infrared radiation action of the planar pad 7, The cushion can be kept at a comfortable temperature. Moreover, since the planar pad 7 having such fibers is interposed on the upper surface of the cell group 11, an air layer is formed and moisture permeability is improved.

  The thickness dimension of the planar pad 7 is preferably set so that the minimum thickness when sitting on the planar pad 7 is 5 mm or less. If the thick planar pad 7 having a minimum thickness of more than 5 mm when sitting is used, the body pressure dispersion action by the cell structure 1 may be weakened.

As described above, when the cell structure 1 shown in FIG. 2 is used as a cushioning material, the cell structure 1 is easily deformed by the gel g flowing when body pressure acts on the cell structure 1. Then, the body pressure can be dispersed, and a large body pressure can be prevented from being generated locally. Therefore, even when sitting for a long time, it is possible to suppress the occurrence of compression disorders such as inhibition of blood circulation in the buttocks and numbness. And, since the internal cell 2 as the core member exists in the external cell 3, it has a shape retaining function to hold the shape so that the whole does not deform too much even if the external cell 3 is deformed, Furthermore, it is possible to provide a restoring function for restoring the entire shape of the cell structure 1 by the elastic force of the internal cell 2.
Furthermore, since the outer peripheral member 5 having excellent moisture permeability, breathability and waterproofness and low frictional resistance is present on the outer periphery of the cell structure 1, it is difficult to cause stuffiness in the cushion and is comfortable even if sitting for a long time. You can do it.

In addition, the cushion of the present invention has a multi-cell structure in which a plurality of independent cell structures 1 are arranged in the front-rear and left-right directions to form the cell group 11, so that the conventional cushion (a part corresponding to the buttocks or the entire surface) is formed. The performance is better than that of one or two large bag members filled with gel. That is, the gel filled in one conventional large bag member flows greatly inside the entire cushion, and when the gel escapes and sits down, it becomes a bottomed state or sits with the buttocks tilted left and right Even if an attempt is made to change the posture from a bad posture to a correct posture, the conventional cushion does not have a restoration function, and thus there is a possibility that the posture is held in a bad posture.
However, since the cushion has a multi-cell structure as in the present invention and each cell structure 1 has an internal cell 2 filled with air a, the gel g flows freely in each cell structure 1. Thus, the body pressure can be dispersed, and the cushion can be prevented from being crushed and the bottom of the cushion can be prevented. In addition, the restoring function by the elastic force of the internal cell 2 makes it easy to change the posture after sitting once.

  FIG. 11 is a distribution diagram showing the body pressure distribution in the buttocks when sitting, and FIG. 11 (a) is when sitting on a cushion provided with the cell structure 1 (shown in FIG. 3) according to the present invention. FIG. 11 (b) shows a case where a conventional large bag member is seated on a cushion filled with gel, and FIG. 11 (c) is directly on the seat surface of the wheelchair without the cushion. It is a body pressure distribution map when sitting down. In these figures, regions are divided in stages from the higher body pressure side to the lower side, and the symbols p, q, r, s, and t are designated from the region on the higher body pressure side. In FIGS. 11A, 11B, and 11C, regions having the same reference sign indicate that the same body pressure is acting.

In FIG. 11 (c) sitting without a cushion, the highest body pressure acts on the left and right portions (region p) of the buttocks, and the body pressure decreases toward the outside. Further, it can be seen that the body pressure is not dispersed with the narrow interval between the regions.
In FIG. 11 (b), which is a case where the cushion of the conventional example is used, there is no region p having the highest body pressure, which is generated without the cushion, and the interval between the regions is slightly widened and the body pressure is increased. It can be seen that they are distributed. However, FIG. 11A, which is a case where the cushion of the example is used, does not include a region q having the next highest body pressure, and the interval between the regions is further widened. It can be seen that the body pressure distribution is well performed. According to the cushion of this embodiment, the weight of the upper body can be dispersed over a wide range from the buttocks to the thighs, and the occurrence of a compression disorder due to an increase in body pressure can be prevented.

  Further, the cushion of the present invention is not limited to the illustrated form, and may be other forms within the scope of the present invention, and the cushion may have a circular shape other than a rectangular shape. Moreover, although the kind about the form of the cell structure 1 in one cushion was demonstrated by 1 type or 2 types, it is good also as 3 types or more.

It is a perspective view showing the outline of the cushion concerning one embodiment of the present invention. It is sectional drawing which shows the outline of the cell structure for cushions. It is a top view which shows the outline of 1st Embodiment of a cushion. It is sectional drawing at the time of cut | disconnecting a cushion to the front-back direction. It is a top view which shows the outline of 2nd Embodiment of a cushion. It is sectional drawing at the time of cut | disconnecting a cushion in the left-right direction. It is a top view which shows the outline of 3rd Embodiment of a cushion. It is a top view which shows the outline of 4th Embodiment of a cushion. It is a top view which shows the outline of 5th Embodiment of a cushion. It is a top view which shows the outline of 6th Embodiment of a cushion. It is a distribution map which shows the body pressure distribution in the buttocks at the time of sitting, (a) is a cushion of an example, (b) is a cushion of a conventional example, (c) is a case without a cushion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cell structure 2 Internal cell 3 External cell 4 External bag member 5 Outer peripheral member 6 Comprehensive member 7 Planar pad 8 Base material 9 Cover material 9a Opening part 10 Internal bag member 11 Cell group a Air g Gel

Claims (6)

  A cell structure for cushioning, comprising: an internal cell filled with air; and an external cell containing the internal cell and filled with gel.   The outer cell has a deformable outer bag member enclosing the inner cell and the gel, and an outer peripheral member having a smaller surface friction resistance than the outer bag member is provided on the outer peripheral side of the outer bag member. The cell structure for cushions according to claim 1 provided.   The cell structure for cushion according to claim 1 or 2, wherein the gel is filled in the external cell together with a far-infrared emitting material.   The cell structure for cushions according to any one of claims 1 to 3, wherein two or more of the internal cells are accommodated in the external cell.   A plurality of cell structures according to any one of claims 1 to 4, and a packaging member that bundles the cell structures that are independent of each other so as to be integrated. Characteristic cushion.   The cushion according to claim 5, wherein the cell structure includes at least two types.

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