JP2010063744A - Cushion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushion stabilizing a position of the buttocks of a seated person and effectively preventing the buttocks from being sore. <P>SOLUTION: Each of the first air cells 10 softly, up/down and horizontally supports the close proximity to the hipbones. A protrusive part 41 is provided in the front from the group of the air cells 10 in a longitudinal direction of the seat face. Tilted protrusive parts 42 are provided in both sides to the part 41 in a widthwise direction of the seat face. Thereby move of the thighs to widthways of the seat face is restrained by the part 41 and forward move of the buttocks is restrained by the parts 41 and 42, stabilizing the position of the buttocks of the seated person and effectively preventing the buttocks from being sore. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cushion used by being placed on a seating surface of a wheelchair, for example.

In general, this type of cushion is provided so as to be aligned horizontally with a flat base member and to extend upward from the upper surface side of the base member to support the seated person's buttocks A plurality of air cells and a front end side support member which is provided on the front end side of the seating surface with respect to the air cell group and which is formed of a sponge-like member and supports both thighs of the seated person, and the height dimension of the front side portion of the base member Is formed larger than the height of the other part of the base member, a hollow part is provided below the front part of the base member, and an electric air pump for adjusting the amount of air in each air cell in the hollow part, electromagnetic A device in which an air amount adjusting device such as a valve is arranged is known (for example, see Patent Document 1).
Japanese Patent No. 4010557

  By the way, in the cushion, the pressure in the vicinity of the seat bone in the seated person's buttocks is likely to be high, and pressure ulcers are likely to occur.Therefore, the height dimension of each air cell that supports this part should be sufficiently secured. Since pressure ulcers are less likely to occur on the lower side compared to the buttocks, both thighs are supported by a front-end support member made of a sponge-like member, and the air volume of the electric air pump, solenoid valve, etc. is adjusted below the front-end support member Equipment is arranged. In addition, since both thighs are supported by the front end side support member, an air cell is provided up to the front end side support member, and in the seating surface width direction of both thighs, compared to the case where both thighs are supported by the air cell. Movement is suppressed, and the posture of the seated person can be stabilized.

  However, the seated person who sits on the cushion has various body shapes. For example, when the back muscles are bent at an elderly age, the pelvis tends to tilt backward, and the pelvis tends to shift forward by tilting the pelvis backward. In this case, the seat occupant's buttocks gradually shifts forward and the seat occupant's buttocks shift forward due to vibration or the like applied to the seat occupant by changing the posture on the cushion or moving the wheelchair. Accordingly, there is a problem that the vicinity of the isch bone where pressure ulcer is likely to occur approaches the front side portion of the front end side support member and the base member, which is not preferable in preventing the occurrence of pressure ulcer.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cushion capable of stabilizing the position of a seated person's buttocks and effectively preventing the occurrence of pressure ulcers. There is to do.

  In order to achieve the above object, the present invention provides a cushion that is placed on a predetermined seating surface and supports a seated person so as to extend upward from the upper surface of the base member. A plurality of air cells that support the occupant's buttocks, and the front side of the seating surface in the front-rear direction of the air cell group composed of each air cell, and the upper surface of the base member is formed in a convex shape upward A convex portion that is disposed substantially at the center in the seating surface width direction of the base member and that can contact the inside of both thighs of the seated person, and is provided on the front side in the front-rear direction of the seating surface from the air cell group composed of each air cell. And a pair of inclined convex portions respectively disposed on both sides of the seating surface width direction with respect to the convex portion, and each of the inclined convex portions is directed from the seating surface rear end side to the front end side. Gradually the height dimension is formed so as to be larger me.

  As a result, a plurality of air cells are provided so as to extend upward from the upper surface side of the base member, and the occupant's buttocks are supported by each air cell. For example, each first air cell has a small area in plan view. It is possible to softly support the vicinity of the seat bone in the vertical direction and the horizontal direction. Here, the applicant was able to obtain from experience that the area of the air bag in the plan view of the air cell greatly affects the rigidity in the vertical direction and the horizontal direction of the air cell.

  In addition, since the convex portion is provided on the front side in the front-rear direction of the seating surface than the air cell group, the convex portion is arranged at the approximate center in the seating surface width direction and can contact the inside of both thighs of the seated person. The movement of both thighs in the seating surface width direction is suppressed by the convex part, and even if the seated person's pelvis is inclined backward, the forward movement of the hip part is convex even if the seated person's buttocks are easily displaced forward. It is suppressed by the shape part.

  In addition, since the inclined convex portions are provided on the front side in the front-rear direction of the seating surface and on both sides in the seating surface width direction with respect to the convex portion with respect to the air cell group, both thighs of the seated person are formed by the inclined convex portions. Supported from below. In addition, the sloped convex part is formed so that the height dimension gradually increases from the seating surface rear end side toward the front end side, so that the seated person can change the posture on the cushion or move the wheelchair. When vibration or the like is applied to the seated person, a force toward the back of the seating surface is applied to both thighs on the inclined convex portion, and the forward movement of the buttocks is suppressed.

  According to the present invention, it is possible to softly support the vicinity of the scapula in the vertical direction and the horizontal direction by each air cell, and the movement of both thighs in the seating surface width direction is suppressed by the convex portion, and the front of the buttock Therefore, the position of the buttocks of the seated person can be stabilized and the occurrence of pressure ulcer can be effectively prevented.

  1 to 8 show an embodiment of the present invention. FIG. 1 is a plan view of a cushion, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 4 is a bottom view of the cushion with the bottom cover removed, FIG. 5 is a perspective view of the base member, FIG. 6 is a side sectional view of the main part of the cushion, FIG. 7 is a plan view of the second air cell, and FIG. It is the schematic of the skeleton of the vicinity. The description of directions in this specification is based on the directions shown in FIGS. The left-right direction of the seating surface coincides with the width direction of the seating surface. In addition, the plan view in the present specification means that the cushion is viewed from above as shown in FIG. 1. In the following description, the description of the comparison of the area of the air cell in the plan view and the rigidity of the air cell is the air pressure in the air cell. The area and rigidity of the air cell in plan view when the pressure becomes 5 kPa (relative pressure to the external pressure) are assumed.

  The cushion includes a plurality of first air cells 10 provided so as to be able to support the vicinity of the seat bones of the seated person, a second air cell 20 having a large area in plan view with respect to the first air cell 10, and the first air cells 10. A pair of third air cells 30 disposed on both sides in the seating surface width direction with respect to the first air cell group, and the lower ends of the first air cells 10, the second air cells 20, and the third air cells 30 are supported. And a base member 40. The seating surface is, for example, a seating surface of a wheelchair, and this cushion is used by being placed on the seating surface in order to support a seated person.

  Each first air cell 10 has an air bag 11 having an open lower end and a bottom member 12 to which an opening edge of the air bag 11 is attached. The air bag 11 has flexibility such as rubber and plastic. It consists of the material which has. Although the air bag 11 of the present embodiment has a side surface formed in a cylindrical shape, the side surface portion can be formed in a polygonal cylindrical shape, or can be formed in another shape. The bottom member 12 is made of rubber or plastic, and a lower protrusion 12 a having a circular cross section is provided on the lower surface of the bottom member 12. Further, the bottom member 12 is provided with a groove 12b provided on the lower end surface thereof and a through hole 12c penetrating from the upper surface into the groove 12b. While fitting the opening edge part of the air bag 11 to the outer peripheral surface of the upper end side of the bottom member 12, and attaching the fitting ring 13 to the outer peripheral surface of the opening edge part of the air bag 11, the air bag 11 becomes the bottom member 12. Is detachably attached.

Further, in order to softly support the vicinity of the ischbone by each first air cell 10, the area of the air bag 11 in a plan view when the internal air pressure becomes 5 kPa (relative pressure to the external air pressure) is 60 cm ² or less. It is preferably 30 cm ² or less. Each first air cell 10 is provided with a coil spring 14 and a switch type sensor 15 in order to detect the bottom of the air bag 11.

  The second air cell 20 has an air bag 21 whose lower end is open and a bottom member 22 to which an opening edge of the air bag 21 is attached by adhesion or the like. The air bag 21 is a flexible material such as rubber or plastic. It is made of a material having properties. The bottom member 22 is made of rubber or plastic, and the lower surface of the bottom member 22 is provided with a plurality of lower protrusions 22a having a circular cross section. In addition, a groove 22b is provided at the lower end surface of one of the lower protrusions 22a, and, like the bottom member 12 of the first air cell 10, the bottom member 22 has a through hole 22c that penetrates into the groove 22b from the upper surface. Is provided.

  The air bag 21 of the second air cell 20 has an area three times or more as large as that of the air bag 11 of the first air cell 10 in plan view, and has the same thickness as the air bag 11 of the first air cell 10. For this reason, the air bag 21 of the second air cell 20 is likely to have high horizontal rigidity with respect to the air bag 11 of the first air cell 10, and the vertical rigidity is also likely to be high. Note that the thickness of the air bladder 21 of the second air cell 20 can be made slightly thicker than the thickness of the air bladder 11 of the first air cell 10. The size of the air bag 21 in the longitudinal direction of the seating surface is three times or more than the size of the air bag 11 in the first air cell 10 in the longitudinal direction of the seating surface, and is formed to be symmetrical in the seating surface width direction. Yes. Further, as shown in FIG. 7, the maximum dimension WR in the seating surface width direction of the rear half portion RP in the front-rear direction of the seating surface of the air bag 21 of the second air cell 20 is in the seating surface width direction of the front half portion FP in the seating surface front-rear direction. It is 1.5 times or more the maximum dimension WF. Here, the front half part FP and the latter half part RP of the air bag 21 are half the size of the air bag 21 in the longitudinal direction of the seating surface. Moreover, since the air bag 21 of the second air cell 20 fits between the concave portion of the lower surface of the perineum and both thighs as described later, and supports the perineum and the inner sides of both thighs, the maximum dimension of the first half portion FP The WF is preferably 40 mm or more and 80 mm or less, and the dimension in the front-rear direction of the seating surface of the air bag 21 of the second air cell 20 is preferably 100 mm or more.

  Further, as shown in FIG. 1, a part of the front end side of the air bag 21 of the second air cell 20 is preferably disposed in the front half portion FA in the front-rear direction of the seating surface of the base member 40. The centroid G is preferably disposed in the rear half portion RA of the base member 40 in the front-rear direction of the seating surface. Note that the front half FA and the rear half RA of the base member 40 are respectively half portions in the front-rear direction of the area of the base member 40 in plan view (including the area of the portion where the attachment holes 21 are provided).

  As shown in FIG. 3, the air bag 21 of the second air cell 20 is formed so that the height dimension gradually increases from the center side in the front-rear direction of the seating surface toward the front end side, and the center in the front-rear direction of the seating surface. The height dimension is gradually increased from the side toward the rear end side.

  As shown in FIG. 1, the air bag 21 has a rear end side in the front-rear direction of the seating surface bifurcated in the seating surface width direction, and two branch portions 21 a are formed on the rear end side of the air bag 21. Further, the respective branch portions 21a are arranged at intervals in the seating surface width direction, and at least one first air cell 10 among the first air cells 10 is arranged between the respective branch portions 21a. That is, the vicinity of the tailbone of the seated person can be supported by the first air cell 10 disposed between the branch portions 21a.

  The third air cell 30 has an air bag 31 whose lower end is open and a bottom member 32 to which the opening edge of the air bag 31 is attached by adhesion or the like. The air bag 31 is a flexible material such as rubber or plastic. It is made of a material having properties. The bottom member 32 is made of rubber or plastic, and a plurality of lower protrusions 32 a having a circular cross section are provided on the lower surface of the bottom member 32. In addition, a groove 32b is provided on the lower end surface of one of the lower protrusions 32a. Like the bottom member 12 of the first air cell 10, the bottom member 32 has a through hole 32c penetrating from the upper surface into the groove 32b. Is provided.

  The air bag 31 of the third air cell 30 has an area three times or more in plan view with respect to the air bag 11 of the first air cell 10 and has the same thickness as the air bag 11 of the first air cell 10. For this reason, the air bag 31 of the third air cell tends to have high horizontal rigidity with respect to the air bag 11 of the first air cell 10, and the vertical rigidity tends to increase. Note that the thickness of the air bladder 31 of the third air cell 30 can be made slightly thicker than the thickness of the air bladder 11 of the first air cell 10. The dimension of the air bag 31 in the front-rear direction of the seating surface is larger than the dimension of the air bag 11 in the first air cell 10 in the front-rear direction. Each third air cell 30 is configured to support both sides in the width direction of the buttocks of the seated person and the outside of both thighs.

  The base member 40 is made of rubber, plastic or the like and is formed in a plate shape. Further, as shown in FIG. 5, a convex portion 41 and a pair of inclined convex portions 42 are provided on the front end side of the base member 40 by forming the upper surface of the base member 40 in a convex shape upward. Yes. Each inclined convex part 42 is arranged on both sides in the seating surface width direction with respect to the convex part 41, and each inclined convex part 42 and the convex part 41 are integrally formed. In addition, it is also possible to form the convex part 41 and each inclination convex part 42 separately. Further, a hollow portion 43 that opens downward is provided below the convex portion 41 and each inclined convex portion 42.

  The convex portion 41 is provided so as to extend in the front-rear direction of the seating surface, and the upper surface is formed by a smooth curved surface. Further, as shown in FIG. 1, the rear end surface of the convex portion 41 in the front-rear direction of the seating surface is formed by a smooth curved surface convex toward the rear end side of the seating surface. The convex portion 41 has a height dimension that allows contact with the inner side in the width direction of both thighs of the seated person. Further, the convex portion 41 as a whole is disposed on the front side in the front-rear direction of the seating surface relative to the air cell group including the first, second, and third air cells 10, 20, and 30, and in the seating surface width direction of the base member 40. It is arranged at the approximate center.

  Each inclined convex part 42 is formed so that the height dimension gradually increases from the seating surface rear end side toward the front end side. The average inclination angle of the top surface of each inclined convex portion 42 with respect to the average extending direction of the bottom surface of the base member 40 is preferably 5 ° or more and 25 ° or less. The average inclination angle is obtained by dividing the height dimension difference between the highest position and the lowest position of the inclined convex portion 42 by the distance in the front-rear direction of the seating surface between the highest position and the lowest position. Further, the highest position of each inclined convex portion 42 is lower than the highest position of the convex portion 41. Each inclined convex portion 42 supports both thighs of the seated person from below.

  As shown in FIG. 5, a plurality of mounting holes 44 are provided in the planar portion of the base member 40, and each mounting hole 44 penetrates the base member 40 in the vertical direction. The lower projecting portions 12a, 22a, 32a of the bottom members 12, 22, 32 of the air cells 10, 20, 30 are inserted into the mounting holes 44 from above and are detachably mounted, whereby the air cells 10, 20, The lower end side of 30 is supported by the base member 40, and the air bags 11, 21, 31 of the air cells 10, 20, 30 are provided so as to extend upward from the upper surface side of the base member 40.

  The hollow portion 43 includes a pump 50 including a known electric air pump for supplying air to each of the air cells 10, 20, and 30, a plurality of electromagnetic valves 60 having a known structure, and a known microcomputer. A control device 70 is attached. The pump 50, each solenoid valve 60, and the control device 70 are fixed in the housing 51 whose lower end is opened, and the housing 51 is fitted into the lower position of the convex portion 41 in the hollow portion 43. A solenoid valve 60 and a control device 70 are mounted in the hollow portion 43. That is, the pump 50, each electromagnetic valve 60, and the control device 70 are disposed below the convex portion 41. The opening of the hollow portion 43 is closed by a plate-shaped bottom cover 43a made of plastic or the like. A battery 80 for supplying electric power to the pump 50, each electromagnetic valve 60 and the control device 70 is provided in the hollow portion 43, and the battery 80 is attached to a position below the inclined convex portion 42 in the hollow portion 43. It has been.

  Each air cell 10, 20, 30 communicates with the pump 50 and each electromagnetic valve 60 through a flexible communication pipe (not shown), and the pump 50 and each electromagnetic valve 60 provide the inside of each air cell 10, 20, 30. The amount of air is adjusted arbitrarily. The communication pipe is connected to the through holes 12c, 22c, 32c of the bottom members 12, 22, 32 of the air cells 10, 20, 30. That is, the pump 50 and each electromagnetic valve 60 function as an air amount adjusting device for adjusting the air amount in each air cell 10, 20, 30, and other air amount adjustments in addition to the pump 50 and each electromagnetic valve 60. It is also possible to provide equipment. The pump 50 and each electromagnetic valve 60 are controlled by a control device 70.

  The cushion configured as described above is covered with, for example, a cloth cushion cover (not shown), and used to support a seated person's buttocks and both thighs. In addition, the amount of air in each of the air cells 10, 20, 30 is automatically adjusted by the control of the control device 70 when the occupant is seated, for example.

Here, the cushion is provided with a plurality of first air cells 10 arranged in a substantially horizontal direction, and each first air cell 10 is provided so as to extend upward from the upper surface side of the base member 40, and is seated. It is arrange | positioned in the range AR where a person's seat bone is arrange | positioned (refer FIG. 1). The range AR is a range that can be specified to some extent according to the body type, symptom, and the like of the target seated person and can be obtained from experience. The range AR also coincides with the range in which the seat bone assumed when the cushion is designed is arranged. Each first air cell 10 is formed so that the area of the air bag 11 in a plan view is preferably 60 cm ² or less, and more preferably 30 cm ² or less. It can be softly supported in the horizontal direction.

  Further, a convex portion 41 is provided on the front side in the front-rear direction of the seating surface with respect to the air cell group including the air cells 10, 20, and 30, and the convex portion 41 is disposed substantially at the center in the width direction of the seating surface. Since the inner surface of the thigh can be contacted, movement of both thighs in the seating surface width direction is suppressed by the convex portion 41, and the seated person's pelvis is inclined backward, and the seated person's buttocks are displaced forward. Even if it is easy, the forward movement of the collar portion is suppressed by the convex portion 41.

  In addition, since the inclined convex portions 42 are provided on the front side in the front-rear direction of the seating surface relative to the air cell group and on both sides in the seating surface width direction with respect to the convex portion 41, the thighs of the seated person are respectively provided with the inclined convex shapes. It is supported from below by the portion 42. In addition, each inclined convex portion 42 is formed so that the height dimension gradually increases from the seating surface rear end side toward the front end side, so that the seated person can change the posture on the cushion, When vibration or the like is applied to the seated person due to the movement, a force toward the back of the seating surface is applied to both thighs on each inclined convex portion 42, and the forward movement of the buttocks is suppressed.

  Thus, according to the present embodiment, each first air cell 10 can softly support the vicinity of the isch bone in the vertical direction and the horizontal direction, and the movement of both thighs in the seating surface width direction is convex. 41, and the forward movement of the buttocks is restrained by the convex portions 41 and the inclined convex portions 42, so that the position of the seated person's buttocks can be stabilized and the occurrence of pressure sores can be effectively prevented. Can be prevented.

  Further, since the convex portion 41 is provided by forming the upper surface of the base member 40 so as to protrude upward, the convex portion 41 is formed separately from the base member 40 and attached to the base member 40. Compared to the case, productivity can be improved and manufacturing costs can be reduced.

  In addition, since each inclined convex portion 42 is also provided by forming the upper surface of the base member 40 so as to protrude upward, each inclined convex portion 42 is formed separately from the base member 40 to form a base. Compared with the case of attaching to the member 40, the productivity can be improved and the manufacturing cost can be reduced.

  In addition, since the average inclination angle of the upper surface of each inclined convex portion 42 with respect to the bottom surface of the base member 40 is 5 ° or more and 25 ° or less, the seat occupant changes his / her posture on the cushion or moves the wheelchair. When vibration or the like is applied to the occupant, a force toward the back of the seating surface is effectively applied to both occupants' thighs, which is extremely advantageous in stabilizing the position of the occupant's buttocks. Here, when the average inclination angle is larger than 25 °, both thighs of the seated person are inclined unnecessarily, and when the average inclination angle is smaller than 5 °, the seating person faces both thighs toward the rear of the seating surface. It is difficult to add power.

  Further, a hollow portion 43 is provided below the convex portion 41 provided on the base member 40, and the pump 50 and each electromagnetic valve 60 capable of adjusting the air amount of each air cell 10, 20, 30 are placed in the hollow portion 43. Is provided. For this reason, for example, when the pump 50 and each electromagnetic valve 60 are not attached to the base member 40, a storage box that separately stores the pump 50 and each electromagnetic valve 60, and the storage box and each air cell 10, 20, 30 are communicated. Although a communication pipe is required, since the pump 50 and each electromagnetic valve 60 are provided in the hollow portion 43, a storage box or the like is not required, and space saving of the cushion can be achieved. Moreover, the convex part 41 is provided in order to contact the inner side of both thighs and suppress movement in the seating surface width direction of both thighs, and needs to have a height dimension enough to contact the inner side of both thighs. Therefore, a sufficient space can be secured below the convex portion 41, which is suitable for disposing the pump 50 and each electromagnetic valve 60. Further, since the pump 50 and each electromagnetic valve 60 have a larger specific gravity and harder than the base member 40 in many cases, the pump 50 and each electromagnetic valve 60 are anchored on the seating surface when the cushion is placed on the seating surface. Thus, the cushion can be reliably positioned on the seating surface.

  In addition, a second air cell 20 having an area three times or more in plan view with respect to each first air cell 10 is provided, and the air bag 21 of the second air cell 20 has a dimension in the longitudinal direction of the seating surface of the first air cell 10. The bag 11 is formed to be larger than the dimension in the front-rear direction of the seating surface, and is disposed substantially at the center in the seating surface width direction, and a part thereof is disposed in the front half portion FA of the base member 40 in the front-rear direction. The centroid G as viewed is disposed in the rear half portion RA of the base member 60 in the front-rear direction of the seating surface. For this reason, although there are variations depending on the body shape of the seated person, at least a part of the perineum of the seated person and a part of the inside of both thighs are often supported by the second air cell 20.

  Here, as shown in FIG. 8, the inner area on the lower end side of the bone constituting the pelvis (the inner area on the lower end side of the sciatic bone, pubic bone, iliac bone, coccyx, sacrum, etc.) is called the perineum. The perineum has no bone and is composed only of soft tissues such as muscle, fat, and rectum. In addition, there is a pubic joint on the front side of the perineum in the pelvis, and the lower end side of the pelvis is concave in the vicinity of the pubic joint. On the other hand, since the second air cell 20 is provided so as to support the perineum of the seated person and the inner sides of both thighs, the second air cell 20 is located below the perineum, the soft tissues of both thighs, and the pubic joint. Be placed. For this reason, since the air bag 21 of the second air cell 20 has an area three times or more in plan view with respect to the air bag 11 of the first air cell 10, the vertical rigidity of the second air cell 20 is increased. There is no particular problem in effectively preventing the occurrence of pressure sores even when the rigidity is higher than the vertical direction.

  In addition, the sciatic bone is arranged on both sides in the seating surface width direction with respect to the pubic bone connection, and the shape of the lower end surface of the perineum part is concave on the center side in the seating surface width direction. The second air cell 20 fits between the lower end surface and both thighs, and the second air cell 20 is deformed in the seating surface width direction with the movement of the perineum and both thighs. Here, since the air bag 21 of the second air cell 20 has an area three times or more in plan view with respect to the air bag 11 of the first air cell 10, the rigidity in the seating surface width direction of the second air cell 20 is the first. It becomes higher than the air cell 10, and the movement in the seating surface width direction of the buttocks is suppressed by the second air cell 20.

Accordingly, each first air cell 10 can softly support the vicinity of the spine in the vertical direction and the horizontal direction, and the air bag 21 of the second air cell 20 is planarly viewed with respect to the air bag 11 of each first air cell 10. In order to effectively prevent the occurrence of pressure sores even when the vertical rigidity of the second air cell 20 is higher than the vertical rigidity of each first air cell 10, There is no particular problem, and the second air cell 20 is fitted between the peritoneum, the lower end surface of the perineum and both thighs, and the movement of the buttocks in the width direction of the seating surface is suppressed by the second air cell 20, and both thighs are seated. Since movement in the surface width direction and movement of the buttocks forward are suppressed by the convex portion 41, pressure sores can be effectively prevented, and it is advantageous for stabilizing the posture of the seated person. When the air bag 21 of the second air cell 20 has an area that is twice or more as large as that of the air bag 11 of the first air cell 10 in plan view, the rigidity of the second air cell 20 in the seating surface width direction is the first air cell. The air bag 21 of the second air cell 20 is replaced by the air bag 11 of the first air cell 10 in order to stabilize the posture of the seated person. On the other hand, it is preferably 3 times or more in plan view. In order to stabilize the posture of the seated person, the air bag 21 of the second air cell 20 preferably has an area of 100 cm ² or more and 300 cm ² or less in plan view.

  Moreover, since the air bag 21 of the second air cell 20 is formed symmetrically in the seating surface width direction, it is advantageous in stabilizing the posture of the seated person. In addition, if the second air cell 20 is formed substantially symmetrically in the seating surface width direction, it is possible to achieve the same operational effects as when symmetrical.

  Further, the air bag 21 of the second air cell 20 has a maximum dimension WR in the seating surface width direction of the rear half part RP in the seating surface longitudinal direction relative to the maximum dimension WF in the seating surface width direction of the front half part FP in the seating surface longitudinal direction. It is formed to be 1.5 times or more. For this reason, when the seat bone of the seated person is arranged in the range AR, the vicinity of the back side of the iliac in the seated person's buttocks is often supported by the rear half portion RP of the second air cell 20 in the longitudinal direction of the seating surface. This is advantageous in stabilizing the posture of the seated person.

  Further, since the size of the air bag 21 of the second air cell 20 in the front-rear direction of the seating surface is three times or more than the size of the air bag 11 of the first air cell 10 in the front-rear direction, the air bag 21 of the second air cell 20 Therefore, it is possible to reliably support from the perineum to the inside of both thighs, which is extremely advantageous for stabilizing the posture of the seated person. In order to support the air bag 21 of the second air cell 20 from the perineum to the inner side of both thighs, the size of the air bag 21 of the second air cell 20 in the longitudinal direction of the seating surface is the air of the first air cell 10. It is preferable that it is twice or more with respect to the dimension of the bag 11 in the front-rear direction.

  In addition, since the air bag 21 of the second air cell 20 is formed so that the dimension in the longitudinal direction of the seating surface is 100 mm or more, the air bag 21 of the second air cell 20 is reliably supported from the perineum to the inside of both thighs. This is extremely advantageous in stabilizing the posture of the seated person. The size of the air bag 21 in the longitudinal direction of the seating surface varies depending on the body shape of the seated person. In order to accommodate seats of various body types, the size of the air bag 21 in the longitudinal direction of the seating surface is 150 mm or more. More preferably, it is formed.

  Further, since the maximum dimension WF in the seating surface width direction in the front half portion FP in the front-rear direction of the seating surface of the air bag 21 of the second air cell 20 is 40 mm or more and 80 mm or less, the air bag 21 has a concave portion on the lower surface of the perineum part and It is easy to fit between both thighs, and is extremely advantageous in stabilizing the posture of the seated person.

  As shown in FIG. 1, the air bag 21 of the second air cell 20 has a rear end side in the front-rear direction of the seating surface branched in the seating surface width direction, and two branch portions 21a are formed on the rear end side of the air bag 21. Since each branch portion 21a is arranged at an interval in the seating surface width direction, the first air cell 10 can be provided between each branch portion 21a. That is, when the seated person's bone is disposed in the range AR, the seated person's bone is often disposed between the branch portions 21a, and the vicinity of the seated bone is supported by the first air cell 10. Therefore, it is possible to softly support the vicinity of the isch bone where the pressure ulcer is easily generated, which is extremely advantageous in effectively preventing the pressure ulcer from occurring.

Further, the third air cells 30 are provided on both sides in the width direction with respect to the first air cell group, and the third air cells 30 support both sides in the width direction of the seated person's buttocks and the outer sides of both thighs. Furthermore, since the air bag 31 of each third air cell 30 has an area three times or more in plan view with respect to the air bag 11 of the first air cell 10, each third air cell 30 is more than the first air cell 10. The horizontal rigidity of the seating surface tends to increase. For this reason, the movement of the seated person's buttocks in the horizontal direction is suppressed by each third air cell 30, and the seated person's posture can be further stabilized. In addition, when the air bag 31 of each 3rd air cell 30 has an area of 2 times or more with planar view with respect to the air bag 11 of the 1st air cell 10, the rigidity of the seating surface width direction of the 3rd air cell 30 is 1st. The air cell 10 is higher than the air cell 10 and can achieve the same effect as described above. However, in order to stabilize the posture of the seated person, the air bag 31 of the third air cell 30 is replaced with the air bag 11 of the first air cell 10. However, it is preferably 3 times or more in plan view. In order to stabilize the posture of the seated person, it is preferable that the air bag 31 of the third air cell 30 has an area of 100 cm ² or more and 300 cm ² or less in plan view.

  Further, since the air bag 21 of the second air cell 20 is formed so that the height dimension gradually increases from the center side in the front-rear direction of the seating surface toward the front end side, movement of the seated person's buttocks forward is prevented. This is extremely advantageous in stabilizing the posture of the seated person.

  Further, since the air bag 21 of the second air cell 20 is formed so that the height dimension gradually increases from the center side in the front-rear direction of the seating surface toward the rear end side, the iliac bone in the buttocks by each branch portion 21a. It is possible to reliably support the vicinity of the back side of the seat, which is extremely advantageous in stabilizing the posture of the seated person.

  In the present embodiment, a configuration in which a pair of third air cells 30 in the width direction is provided is shown, but a plurality of third air cells 30 can be provided on both sides in the seating surface width direction with respect to the first air cell group. Even in this case, the same effect as described above can be achieved.

  Moreover, in this embodiment, the convex part 41 is provided by forming the upper surface of the base member 40 convex upward, and the upper surface of the convex part 41 can contact the inside of both thighs of the seated person. Showed things. On the other hand, a buffer member made of a well-known sponge-like member, cloth member or the like can be attached to the upper surface of the convex portion 41.

  In this embodiment, each inclined convex portion 42 is provided by forming the upper surface of the base member 40 so as to protrude upward, and the upper surface of each inclined convex portion 42 lowers both thighs of the seated person. Supported from the side. On the other hand, a buffer member made of a well-known sponge-like member, cloth member, or the like can be attached to the upper surface of each inclined convex portion 42.

  Moreover, in this embodiment, each inclined convex part 42 is provided by forming the upper surface of the base member 40 in convex shape toward upper direction. On the other hand, each inclined convex portion 42 can be formed by attaching a known sponge-like member, or can be formed by attaching an air bag made of a flexible material such as plastic or rubber. Is possible. Even in these cases, the first air cell 10 can softly support the vicinity of the isch bone in the vertical direction and the horizontal direction, and the movement of both thighs in the seating surface width direction is suppressed by the convex portion 41, so that the front of the buttocks Is suppressed by the convex portion 41 and each inclined convex portion 42, and the same effect as described above can be achieved.

  In the present embodiment, the highest position of each inclined convex portion 42 is lower than the highest position of the convex portion 41. On the other hand, even when the highest position of each inclined convex portion 42 is equal to or slightly higher than the highest position of the convex portion 41, each first air cell 10 softly supports the vicinity of the spine in the vertical and horizontal directions. The movement of both thighs in the seating surface width direction is suppressed by the convex portion 41, and the forward movement of the buttock is suppressed by the convex portion 41 and each inclined convex portion 42. It is possible to achieve the operational effects.

  In the present embodiment, the air cells 10, 20, and 30 communicate with the pump 50 and the electromagnetic valves 60 through flexible communication pipes. On the other hand, it is also possible to provide an air passage in the base member 40 so that the air cells 10, 20, and 30 communicate with the pump 50 and the electromagnetic valves 60 through the air passage.

  In the present embodiment, the pump 50 and each electromagnetic valve 60 are provided to adjust the air amount of each air cell 10, 20, 30. However, instead of the pump 50 and each electromagnetic valve 60, it is well known. It is also possible to provide a manual pump.

  In the present embodiment, the bottom members 12, 22, and 32 of the air cells 10, 20, and 30 are removably attached to the base member 40. On the other hand, the air bags 11, 21, 31 of the air cells 10, 20, 30 can be directly attached to the base member 40, and the air cells 10, 20, 30 are integrated with part or all of the base member 40. The air cells 10, 20, and 30 can be provided on the base member 40 in other known manners.

  In the present embodiment, the three types of air cells 10, 20, and 30 are provided on the base member 40, but it is also possible to provide only the plurality of first air cells 10 on the base member 40. Even in this case, the first air cell 10 can softly support the vicinity of the isch in the vertical direction and the horizontal direction, and the movement of both thighs in the seating surface width direction is suppressed by the convex portion 41, and the front of the buttock Is restrained by the convex portion 41 and the inclined convex portions 42, so that the same effect as described above can be achieved.

  9 to 11, the shape of the air bag 21 of the second air cell 20 can be changed. That is, as shown in FIG. 9, it is possible not to provide a branch portion on the rear end side of the air bag 21, and as shown in FIG. 10, the air bag 21 is moved from the center side in the front-rear direction of the seating surface to the front end side. It is also possible to form the air bag 21 so that the height dimension gradually becomes smaller. As shown in FIG. 11, the height dimension of the air bag 21 gradually increases from the seating surface rear end side toward the front end side. It is also possible to form it. Even in these cases, each first air cell 10 can softly support the vicinity of the isch bone in the vertical direction and the horizontal direction, and the second air cell 20 fits between each isch, between the lower end surface of the perineum and both thighs. The movement of the buttocks in the seating surface width direction is suppressed by the second air cell 20, and the movement of both thighs in the seating surface width direction and the forward movement of the buttocks are suppressed by the convex portion 41. It is possible to achieve the operational effects.

  In the present embodiment, the first air cells 10 are all formed in the same shape. However, the shapes of the first air cells 10 may be different from each other. For example, the first air cells 10 may have different shapes. It is also possible to configure the areas in plan view to be different from each other, and it is also possible to configure the first air cells 10 to have different height dimensions.

The top view of the cushion which shows one Embodiment in this invention AA line sectional view in FIG. BB sectional view in FIG. Bottom view of cushion with bottom cover removed Perspective view of base member Side sectional view of the main part of the cushion Plan view of the second air cell Schematic view of the skeleton near the pelvis The perspective view of the air bag of the 2nd air cell which shows the 1st modification of this embodiment. The perspective view of the air bag of the 2nd air cell which shows the 2nd modification of this embodiment. The perspective view of the air bag of the 2nd air cell which shows the 3rd modification of this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... 1st air cell, 11 ... Air bag, 20 ... 2nd air cell, 21 ... Air bag, 30 ... 3rd air cell, 31 ... Air bag, 40 ... Base member, 41 ... Convex part, 42 ... Inclined convex part , 43 ... Hollow part, 50 ... Pump, 60 ... Solenoid valve, 70 ... Control device, G ... Centroid, FA ... First half part, RA ... Second half part, FP ... First half part, RP ... Second half part.

Claims (14)

In a cushion that is placed on a predetermined seating surface and supports a seated person,
A plate-like base member;
A plurality of air cells each provided to extend upward from the upper surface side of the base member and supporting the seated person's buttocks;
It is provided on the front side in the front-rear direction of the seating surface than the air cell group consisting of each air cell, and is provided by forming the upper surface of the base member in a convex shape upward, at the approximate center of the base member in the seating surface width direction. A convex part that is arranged and can contact the inside of both thighs of the seated person;
Provided on the front side of the seating surface longitudinal direction than the air cell group consisting of each air cell, and a pair of inclined convex portions disposed on both sides of the seating surface width direction with respect to the convex portion,
Each of the inclined convex portions is formed so that the height dimension gradually increases from the seating surface rear end side toward the front end side. The hollow part is formed in the lower side of the convex part provided in the said base member, The air quantity adjusting device which can adjust the air quantity of each air cell was provided in the hollow part. cushion. The cushion according to any one of claims 1 and 2, wherein each of the inclined convex portions is provided by forming the upper surface of the base member so as to protrude upward. The cushion according to any one of claims 1, 2, and 3, wherein an average inclination angle of an upper surface of each inclined convex portion with respect to a bottom surface of the base member is 5 ° or more and 25 ° or less. Each of the air cells has a plurality of first air cells that support the vicinity of the seat bones of the seated person, and has an area that is more than twice as large as each first air cell in plan view, and the dimensions in the front-rear direction of the seating surface are the first dimensions. The air cell is formed to be larger than the dimension in the front-rear direction of the seating surface, and is disposed substantially at the center in the width direction of the seating surface, and includes a second air cell that supports at least a part of the perineum of the seated person and the inner sides of both thighs. The cushion according to any one of claims 1, 2, 3 and 4. Each air cell has a plurality of first air cells that support the vicinity of the seat bones of the seated person and an area of 100 cm ² or more and 300 cm ² or less in plan view, and the dimension of the seating surface longitudinal direction is the seating surface of each first air cell. It is formed larger than the dimension in the front-rear direction, and is arranged at the approximate center in the seating surface width direction, and is provided with a second air cell that supports at least a part of the perineum of the seated person and the inner sides of both thighs. The cushion according to any one of claims 1, 2, 3, and 4. Each of the air cells has a plurality of first air cells that support the vicinity of the seat bones of the seated person, and has an area that is more than twice as large as each first air cell in plan view, and the dimensions in the front-rear direction of the seating surface are the first dimensions. It is formed larger than the dimension of the seating surface in the front-rear direction of the air cell, and is disposed at the approximate center of the seating surface width direction, and a part thereof is disposed in the front half of the seating surface front-rear direction of the base member. The cushion according to any one of claims 1, 2, 3, and 4, wherein a second air cell having a center disposed in a rear half portion in the front-rear direction of the seating surface of the base member is provided. Each air cell has a plurality of first air cells that support the vicinity of the seat bones of the seated person and an area of 100 cm ² or more and 300 cm ² or less in plan view, and the dimension of the seating surface longitudinal direction is the seating surface of each first air cell. It is formed to be larger than the dimension in the front-rear direction, and is disposed substantially at the center in the seating surface width direction. The cushion according to claim 1, further comprising a second air cell disposed in a rear half portion of the seating surface in the front-rear direction. The cushion according to any one of claims 5, 6, 7 and 8, wherein the second air cell is formed so as to be substantially symmetrical in the seating surface width direction. The second air cell is formed so that the maximum dimension in the seating surface width direction of the rear half part of the seating surface longitudinal direction is 1.5 times or more than the maximum dimension in the seating surface width direction of the front half part of the seating surface longitudinal direction. The cushion according to any one of claims 5, 6, 7, 8, and 9. The said 2nd air cell was formed so that height dimension might become large gradually toward the front-end side from the center side of the seating surface front-back direction, The Claim 5, 6, 7, 8, 9 or 10 characterized by the above-mentioned. A cushion according to any one of the above. The said 2nd air cell was comprised so that the rear-end side of a seating surface front-back direction might be bifurcated into the seating surface width direction, The any one of Claim 5, 6, 7, 8, 9, 10, or 11 characterized by the above-mentioned. Cushion as described in. Each air cell is disposed on both sides in the seating surface width direction with respect to the first air cell group composed of each first air cell, and has an area that is twice or more in plan view with respect to each first air cell, A plurality of third air cells having a dimension in the front-rear direction of the seating surface that is larger than each first air cell are provided. The claim according to any one of claims 5, 6, 7, 8, 9, 10, 11 or 12. cushion. The air cells are arranged on both sides in the seating surface width direction with respect to the first air cell group composed of each first air cell, and have an area of 100 cm ² or more and 300 cm ² or less in plan view, and the seating surface longitudinal direction The cushion according to any one of claims 5, 6, 7, 8, 9, 10, 11, or 12, wherein a plurality of third air cells having a larger dimension than each of the first air cells are provided.