JP2012095818A - Air cell and air cell cushion using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cell and an air cell cushion using the same which are adapted to the size of the buttocks of a seated person or the size of a seat surface without an increase in production cost.SOLUTION: In the air cell cushion, at least one pair of air cells 20 of the air cells, are disposed at both ends in a width direction of the seat surface, and the pair of air cells each have at least one inside air storage portion 21b for storing air, and when the air storage portion 21b is mounted to a base member 40, the air storage portion partially projects outward in the width direction of the seat surface relative to a base member 40. Accordingly, the air cells 20 formed to project by an amount corresponding to the width dimension of the buttocks of the seated person or the width dimension of the seat surface, are mounted to both sides in a width direction of the base member 40, so that the contact area between the air cells 10 and 20 and the buttocks of the seated person is increased as much as possible.

Description

  The present invention relates to an air cell that is placed on a seating surface of a wheelchair or chair, for example, and supports a seated person's buttocks, and an air cell cushion using the air cell.

  In general, this type of air cell cushion includes a plate-shaped base member, a lower end side supported by each base member, and extending upward from the upper surface side of the base member, so that they are aligned in a substantially horizontal direction. There is known a cushion body having a plurality of air cells disposed on the surface of the body and mounted on a predetermined seating surface to support a seated person (see, for example, Patent Document 1).

JP 2008-284163 A

  By the way, the air cell cushion is formed so that the width dimension of the base member is slightly smaller than, for example, the width dimension of the seating surface of a standard wheelchair so that it can be placed on most wheelchairs. Each air cell is formed so as to extend almost straight upward from the upper surface side of the base member. For this reason, when the width dimension of a seated person's buttocks is large, a seated person's buttocks protrudes to the outer side of the width direction of a base member, and the part is no longer supported by an air cell. Here, since it is possible to effectively disperse the pressure applied to the seated person's buttocks by increasing the contact area between each air cell and the seated person's buttocks, the seating with a large width of the buttocks on the air cell cushion When a person is seated, there is a problem that the effect of dispersing pressure is reduced by the amount that the collar portion protrudes outward in the width direction of the base member.

  On the other hand, although it is possible to prepare multiple types of air cell cushions with different width dimensions depending on the size of the seated person's buttocks and the size of the seating surface, the base member is generally made of rubber with a molding die. In the case of a type in which the base member and each air cell are integrally molded, it is formed by repeatedly immersing the molding die in rubber in an emulsion state and drying, In any case, a plurality of molding dies are required depending on the type of the width dimension of the base member, and there is a problem that the manufacturing cost increases.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to adapt to the size of a seated person's buttocks and the size of a seating surface without incurring an increase in manufacturing cost. An object is to provide an air cell and an air cell cushion using the air cell.

  In order to achieve the above-mentioned object, the present invention includes a plate-like base member and a plurality of air cells arranged so as to be aligned in a substantially horizontal direction and extending upward from the upper surface side of the base member. An air cell that is attached to an air cell cushion, and is configured to be detachably attached to the width direction end side of the base member, and has at least one bag-like air accommodating portion that can accommodate air therein. When attached to the base member, a part of the air accommodating portion is formed so as to protrude outward in the seating surface width direction with respect to the base member, and downwardly directed to a part of the air accommodating portion protruding outward in the width direction. The lower protrusion part which protrudes is provided.

  The present invention also includes a plate-like base member and a plurality of air cells arranged so as to be aligned in a substantially horizontal direction and extending upward from the upper surface side of the base member. In the air cell cushion that is placed on the seating surface and supports the buttocks of the seated person, at least one pair of air cells respectively disposed at both ends of the seating surface in the seating surface width direction among the air cells is disposed at both ends in the width direction of the base member. Each of the air receiving portions is detachably attached and has at least one air accommodating portion capable of accommodating air therein. When the air accommodating portion is attached to the base member, a part of the air accommodating portion is disposed outwardly in the seating surface width direction. The lower protrusion part which protrudes toward the downward direction is provided in a part of the air accommodating part which is configured to protrude and protrudes outward in the width direction.

  As described above, the air cells attached to both sides in the width direction of the base member have at least one bag-like air accommodating portion capable of accommodating air therein, and when the air cell is attached to the base member, a part of the air accommodating portion becomes the base. It protrudes outward in the seating surface width direction with respect to the member. For this reason, for example, when the width dimension of the seated person's buttock is large, or when the width dimension of the seating surface is large, it is formed so as to protrude by an amount corresponding to the width dimension of the seated person's buttocks or the width dimension of the seating surface. By attaching the air cells to both sides of the base member in the width direction, the contact area between each air cell and the buttock of the seated person can be maximized.

  Moreover, in each air cell attached to the width direction end side, since the lower side protrusion part which protrudes below is provided in a part of air accommodating part which protruded to the width direction outer side from the base member, the width direction end side When a force toward the outside in the seating surface width direction is applied to each air cell attached to the seat, the lower protrusion prevents the air cell attached to the end in the width direction from falling or tilting outward in the seating surface width direction. A seated person's buttocks are reliably supported by each air cell attached to the width direction end side.

  In addition, since it is detachably attached to the width direction end side of the base member, for example, when the width dimension of the seated person's buttocks is different, or when the width dimension of the seating surface is different, the width dimension of the seated person's buttocks or the seating It is possible to respond by attaching air cells formed so as to protrude by an amount corresponding to the width direction of the surface on both sides of the base member in the width direction, and the width dimension according to the size of the seated person's buttocks and the size of the seating surface There is no need to prepare a plurality of types of base members having different sizes.

  Further, the present invention provides a plate-like base member and an air cell cushion provided with a plurality of air cells that are arranged so as to be aligned in a substantially horizontal direction and extend upward from the upper surface side of the base member. An air cell to be attached, which is configured to be detachably attached to the rear end side of the base member, has at least one bag-like air accommodating portion capable of accommodating air therein, and is attached to the base member. And a part of the air accommodating portion that protrudes outward from the seating surface rearward with respect to the base member, and a lower protruding portion that protrudes downward from a portion of the air accommodating portion that protrudes outward. Provided.

  The present invention also includes a plate-like base member and a plurality of air cells arranged so as to be aligned in a substantially horizontal direction and extending upward from the upper surface side of the base member. In the air cell cushion that is placed on the seating surface of the seat and supports the buttocks of the seated person, at least one air cell arranged at the rear end of the seating surface among the air cells is detachably attached to the rear end side of the base member. And has at least one air accommodating portion capable of accommodating air therein, and a part of the air accommodating portion protrudes to the outside on the rear side of the seating surface when attached to the base member. And the lower side protrusion part which protrudes below is provided in a part of air accommodating part which protruded to the outer side of this seating surface.

  Thus, the air cell attached to the rear end side of the base member has at least one bag-like air accommodating portion capable of accommodating air therein, and when attached to the base member, a part of the air accommodating portion becomes the base. It protrudes outside the seating surface with respect to the member. For this reason, for example, when the seated person's buttocks are large in the front-rear direction or when the seating surface has a large front-rear dimension, only the amount corresponding to the dimensions of the seated person's buttocks and the seating surface in the front-rear direction By attaching the air cell formed so as to protrude to the rear end side of the base member, the contact area between each air cell and the buttocks of the seated person can be maximized.

  Further, in the air cell attached to the rear end side, a part of the air accommodating part that protrudes outward in the width direction from the base member is provided with a lower protruding portion that protrudes downward, so that it is attached to the rear end side. In addition, when the outward force is applied to each air cell with respect to the base member, the lower protrusion prevents the air cell attached to the rear end side from falling or tilting to the rear side of the seating surface, and the rear end side The seated person's buttocks are reliably supported by the attached air cells.

  In addition, since it is detachably attached to the rear end side of the base member, for example, when the size of the seat occupant's buttocks is different, or when the size of the seating surface is different in the longitudinal direction, It is possible to cope by attaching an air cell formed so as to protrude by an amount corresponding to the size in the front-rear direction and the front-rear direction of the seating surface on the rear end side of the base member. There is no need to prepare a plurality of types of base members having different sizes depending on the size of the base member.

  According to the present invention, each air cell is formed by attaching an air cell formed so as to protrude by an amount corresponding to the size of the seated person's buttocks and the size of the seating surface to the width direction end side or the rear end side of the base member. And the seated person's buttocks contact area can be increased as much as possible, and the lower protrusion prevents the air cell from being tilted outward or tilted with respect to the base of each air cell attached to the width direction end or rear end. Therefore, when the seated person's buttocks are securely supported by the air cells attached to the width direction end side and the rear end side, and when the seated person's buttocks size is different or the seating surface size is different Can be accommodated by attaching an air cell formed so as to protrude by an amount corresponding to the size of the buttocks of the seated person and the size of the seating surface to the width direction end side or rear end side of the base member. The size of the buttocks It is not necessary to prepare a plurality of types of base members having different sizes depending on the size of and the seating surface. As described above, it is possible to provide an air cell that can be adapted to the size of a seated person's buttocks and the size of a seating surface without causing an increase in manufacturing cost, and an air cell cushion using the air cell.

The top view of the air cell cushion which shows one Embodiment of this invention AA line sectional view in FIG. Plan view of air cell cushion with each second air cell removed BB sectional view in FIG. Cross section of air cell cushion with cushion cover attached Cross section of the main part of the air cell cushion Operation explanatory diagram of the second air cell Operation explanatory diagram of the second air cell Sectional drawing of the 2nd air cell which shows the 1st modification in this embodiment The top view of the air cell cushion which shows the 2nd modification in this embodiment The top view of the air cell cushion which shows the 3rd modification in this embodiment. Sectional drawing of the 2nd air cell which shows the 4th modification in this embodiment. The perspective view of the 2nd air cell which shows the 5th modification in this embodiment. The perspective view of the 2nd air cell which shows the 6th modification in this embodiment.

  An air cell cushion according to an embodiment of the present invention will be described with reference to FIGS. The directions in the following description are based on the directions shown in FIGS.

  This air cell cushion is provided on both sides of the seating surface in the width direction with respect to a plurality of first air cells 10 arranged so as to be able to support the vicinity of the seat bone of the seated person and the vicinity of the tailbone, and the air cell group composed of the first air cells 10. A plurality of pairs of second air cells 20 provided to support both sides of the seated person's buttocks in the width direction, and front ends provided on the front end side of the seating surface with respect to the first air cells 10 and the second air cells 20, respectively. Side support members 30 and plate-like base members 40 that respectively support the first air cells 10, the second air cells 20, and the lower end sides of the front end side support members 30 are provided. The seating surface is, for example, a seating surface of a wheelchair, and this cushion is used by being placed on the seating surface of a wheelchair or a chair in order to softly support a seated person's buttocks.

  Each first air cell 10 has an opening at the lower end and is formed so as to be able to accommodate air therein, and is formed of an air bag having a thickness of about 0.5 mm to 1.0 mm, for example. Each first air cell 10 is made of a flexible material such as rubber or plastic.

  Each second air cell 20 has an air bag 21 whose lower end is open, and a bottom member 22 to which an opening edge 21a of the air bag 21 is attached by adhesion, fitting, or the like. The air bag 21 is made of a flexible material such as rubber or plastic. 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 the horizontal direction. The bottom member 22 is provided with a through hole 22b penetrating from the upper surface thereof to the lower surface of the lower protrusion 22a.

  The thickness of the film constituting each air bladder 21 is, for example, about 0.5 mm to 1.5 mm, and an air accommodating portion 21 b that accommodates air is formed inside each air bladder 21. The air accommodating portion 21b is a portion indicated by hatching in the second air cell 20 on the left side of FIG. Further, as shown in FIG. 4, each air bag 21 is formed such that a part of the air accommodating portion 21 b protrudes outward in the seating surface width direction with respect to the base member 40, and protrudes outward in the width direction. A lower protruding portion 21c that protrudes downward is provided in a part of the air accommodating portion 21b. In the present embodiment, one lower protrusion 21c having a front-rear direction dimension extending substantially in the front-rear direction of the seating surface of the second air cell 21 is formed, but a part of the seating surface front-rear direction of the second air cell 21 is formed. It is also possible to form one lower protrusion 21c only in this range, and it is also possible to form a plurality of lower protrusions 21c at intervals in the front-rear direction of the seating surface of the second air cell 21.

  Further, on the outer side of the opening edge portion 21a of the air bag 21 in the seating surface width direction, the film constituting the air bag 21 extends upward from the opening edge portion 21a and then extends outward in the seating surface width direction. In addition, after extending downward thereafter, the lower protruding portion 21c is formed by extending outward in the seating surface width direction and extending upward. That is, the lower protruding portion 21c is formed by a portion in which a film at the lower end of the bag-like air accommodating portion 21b protruding outward in the seating surface width direction with respect to the base member 40 extends downward.

  Further, when the second air cell 20 is attached to the base member 40, the difference in the vertical position between the lower end of the lower protruding portion 21c and the lower surface of the base member 40 is ± 5 mm or less. .

  Further, a concave portion 21d is formed at the lower end of the lower projecting portion 21c of the air bag 21 so that a part of the film constituting the lower end is recessed upward, and the concave portion 21d is seated on the lower end portion 21c. It is formed so as to extend over substantially the entire range in the front-rear direction. In addition, it is also possible to form one concave portion 21d only in a partial range of the lower protrusion 21c in the front-rear direction of the seating surface, and form a plurality of concave portions 21d at intervals in the front-rear direction of the seating surface. It is also possible.

  In addition, a concave portion 21e is formed on the upper end side of the side surface of each air bag 21 on the seating surface width direction inner side, in which a part of the film constituting the side surface is formed concave toward the outer side of the seating surface width direction, The concave portion 21e is formed so as to extend over substantially the entire seat surface front-rear direction of the air bag 21.

  The front end side support member 30 is made of a sponge-like member such as urethane foam, and supports the vicinity of the thigh of the seated person.

  The base member 40 is made of rubber or plastic and has a flat plate shape. The base member 40 is formed by bonding an upper base member 40a formed in a flat plate shape and a lower base member 40b formed in a flat plate shape. The upper base member 40a is provided with a plurality of mounting holes 40c that open upward, and the opening edge of the first air cell 10 and the lower protruding portion 22a of the second air cell 20 are detachably attached to the mounting hole 40c. The lower end sides of the air cells 10 and 20 are detachably attached to the base member 40. A groove 40d is provided at a predetermined position on the upper surface of the lower base member 40b, and a through hole 40e penetrating the upper base member 40a in the vertical direction is provided at a position corresponding to the mounting hole 40c of the upper base member 40a. A ventilation passage is formed in the base member 40 by the groove 40d and each through hole 40e. In addition, the lower end surface of the front end side support member 30 is supported by the base member 40 by attaching the lower end surface of the front end side support member 30 to the upper surface of the front end portion 40f of the base member 40 with a surface fastener, an adhesive, or the like. The front end portion 40f of the base member 40 has a larger thickness dimension than the other portions, and the front end portion 40f is provided with a hollow portion 41 that opens downward. That is, the hollow portion 41 is disposed below the front end side support member 30. As described above, the base member 40 is formed in a plate shape as a whole, although the front end portion 40f has a larger thickness dimension than the other portions.

  A thin film portion 40g is formed integrally in a substantially central portion of a part of the mounting holes 40c of the mounting holes 40c to which the first air cells 10 are mounted, and is formed in a cylindrical shape in the first air cell 10. An elastic member 42 that is elastically deformable in the vertical direction and the horizontal direction is provided. The elastic member 42 is made of a known material having rubber-like elasticity such as rubber or urethane, and the lower end is attached to the upper surface of the thin film portion 40g. A cylindrical portion of the elastic member 42 is formed in a bellows shape, and the elastic member 42 is elastically deformed smoothly in the vertical direction.

  A hole 40h having a rectangular cross section is provided below each thin film portion 40g in the base member 40, and each hole 40h is formed to extend in the vertical direction. Each hole 40h opens to the lower surface of the base member 40, and a well-known switch type sensor 43 is mounted in each hole 40h. When a downward force of a predetermined size or more is applied to the button 43a provided so as to be movable in the vertical direction, the sensor 43 is energized in the circuit provided therein by the downward movement of the button 43a. For this reason, when the amount of collapse of the first air cell 10 in the vertical direction in the mounting hole 40c provided with the thin film portion 40g exceeds a predetermined amount, a downward force is applied to the elastic member 42, and the elastic member 42 moves in the vertical direction. The thin film portion 40g is elastically deformed downward by the reaction force of the elastic member 42, and the deformation is detected by the sensor 43. That is, it is detected that the amount of collapse of the first air cell 10 in the vertical direction is equal to or greater than a predetermined amount (for example, an amount that is not preferable for softly supporting a seated person's buttocks).

  In the hollow portion 41, a pump 50 including a known electric air pump for supplying air to the air cells 10 and 20, and a known air path for switching the air passage from the air cells 10 and 20 to the air cells 10 and 20, respectively. There are provided a plurality of solenoid valves EV having the structure described above, a control device (not shown) composed of a well-known microcomputer for controlling the operation of the pump 50 and each solenoid valve EV, and the like. The opening of the hollow portion 41 is closed by a plate-like bottom cover 41a made of plastic.

  The air cell cushion configured as described above is covered with, for example, a cloth cushion cover 100 and is used by being placed on a seating surface of a wheelchair. The air cell cushion is configured such that, for example, when a seated person is seated, the amount of air in each air cell 10, 20 is automatically adjusted by the control device, the pump 50, and each electromagnetic valve EV.

  In addition, the air cell cushion is configured such that, for example, the first air cell 10 supports the lower surface of the occupant's buttocks, and the second air cells 20 support both sides of the seat occupant in the width direction. When the seated person sits on the air bag 10, the air bags 11, 21 of the air cells 10, 20 are softly deformed in the vertical direction and the horizontal direction.

  Here, each 2nd air cell 20 attached to the width direction both sides of the base member 40 has the air accommodating part 21b which can accommodate air inside, and if it attaches to the base member 40, a part of air accommodating part 21b will be It protrudes outward in the seating surface width direction with respect to the base member 40. For this reason, for example, when the width dimension of the seated person's buttock is large, or when the width dimension of the seating surface is large, it is formed so as to protrude by an amount corresponding to the width dimension of the seated person's buttocks or the width dimension of the seating surface. By attaching the second air cell 20 to both sides of the base member 40 in the width direction, the contact area between the air cells 10 and 20 and the seated person's buttocks can be maximized.

  Moreover, in each 2nd air cell 20 attached to the width direction both sides of the base member 40, the lower side protrusion part 21c which protrudes below on a part of air accommodating part 21b protruded from the base member 40 in the width direction outer side is provided. Is provided. For this reason, when a force toward the outside in the seating surface width direction is applied to each second air cell 20, the air cell attached to both sides in the width direction by the lower protrusions 21c is tilted or inclined outward in the seating surface width direction. The second air cell 20 is surely supported and the seated person's buttocks are reliably supported. In particular, in the present embodiment, each second air cell 20 is provided so as to support both sides of the seat occupant's buttocks in the width direction, and each second air cell 20 can support the vicinity of the seat bone of the seat occupant's buttocks and the vicinity of the coccyx. Each of the first air cells 10 is formed to have a larger area in plan view. Each second air cell 20 is higher in rigidity in the seating surface width direction and in the front-rear direction than each first air cell 10 and suppresses the movement of the seated person's buttocks in the seating surface width direction and in the front-rear direction, thereby changing the posture of the seated person. In order to contribute to stabilization, the lower protrusions 21b prevent the air cells attached to both sides in the width direction from falling or tilting to the outside in the seating surface width direction, thereby stabilizing the posture of the seated person. Very advantageous.

  In addition, since each second air cell 20 is detachably attached to both ends in the width direction of the base member 40, for example, when the width dimension of the seated person's buttocks or the width dimension of the seating surface is different, the seated person The second air cell 20 formed so as to protrude by an amount corresponding to the width dimension of the buttocks and the width of the seating surface can be accommodated by mounting on both sides in the width direction of the base member 40, and the size of the seated person's buttocks There is no need to prepare a plurality of types of base members 40 having different width dimensions according to the size of the sheath surface.

  Thus, according to the present embodiment, the second air cells 20 formed so as to protrude by an amount corresponding to the width dimension of the seated person's buttocks and the width dimension of the seating surface are attached to both sides of the base member 40 in the width direction. Thereby, the contact area of each air cell 10 and 20 and a seated person's buttocks can be enlarged as much as possible. In addition, since the lower protrusions 21c prevent the second air cells 20 from falling or tilting outward in the seating surface width direction, the second air cells 20 reliably support the seated person's buttocks. Furthermore, when the width dimension of the seated person's buttocks is different, or when the width dimension of the seating surface is different, it is formed so as to protrude by an amount corresponding to the width dimension of the seated person's buttocks and the width dimension of the seating surface. 2 It is possible to cope by attaching the air cell 20 to both sides of the base member 40 in the width direction, and it is necessary to prepare a plurality of types of base members 40 having different width dimensions according to the size of the seated person's buttocks and the size of the seating surface. Absent. Thus, the second air cell 20 that can be adapted to the size of the seated person's buttocks and the size of the seating surface and the air cell cushion using the same can be provided without increasing the manufacturing cost.

  Further, a portion of the air accommodating portion 21 b that protrudes outward in the seating surface width direction with respect to the base member 40 is formed by a film made of a flexible material, and the lower protrusion 21 c is formed with respect to the base member 40. A film at the lower end of the air accommodating portion 21b protruding outward in the direction is formed by a portion extending downward. For this reason, as shown in FIG. 7, when a force is applied to each second air cell 20 from the outside in the seating surface width direction, the size of the lower protrusion 21 c decreases in the seating surface width direction. That is, even when the width dimension of the seating surface is slightly smaller than the air cell cushion of the present embodiment and the second air cells 20 on both sides in the width direction are in contact with the armrests of the wheelchair, the lower protruding portion of each second air cell 20 By reducing the dimension of 21c in the seating surface width direction, the width dimension of the air cell cushion is adapted to the seating surface. That is, it is possible to flexibly cope with the size of the seating surface.

  Moreover, the concave part 21d is provided in the lower end of the lower side protrusion part 21c of the 2nd air cell 20 by forming a part of film | membrane which comprises the lower end of the lower side protrusion part 21c concavely upwards. Therefore, as shown in FIG. 7, when a force is applied to each second air cell 20 from the outside in the seating surface width direction, the lower end of the lower protruding portion 21c is easily folded starting from the recessed portion 21d, and the lower side The dimension of the protrusion 21c is smoothly reduced in the seating surface width direction.

  Further, a concave portion 21e is provided on the upper end side of the side surface in the seating surface width direction in the air accommodating portion 21b by forming a part of the film constituting the side surface in a concave shape toward the outer side in the seating surface width direction. Yes. As a result, as shown in FIG. 8, when a downward force is applied to the upper surface of the second air cell 20, the second air cell 20 is compared with the case where no concave portion is provided on the upper end side of the air accommodating portion 21 b. The air bag 21 is softly crushed in the vertical direction starting from the concave portion 21e, which is extremely advantageous for softly supporting the seated person's buttocks.

  In the present embodiment, the lower protruding portion 21c is formed in a hollow shape, but as shown in FIG. 9, the lower protruding portion 21c can be formed in a solid shape.

  In the present embodiment, the air accommodating portions 21b of the pair of second air cells 20 attached to the rear end side of the seating surface among the second air cells 20 are only on the outer side in the seating surface width direction with respect to the base member 40. What formed so that it might protrude was shown. On the other hand, as shown in FIG. 10, the air accommodating portions 21 c of the pair of second air cells 20 attached to the rear end side of the seating surface protrude outward in the seating surface width direction with respect to the base member 40. It is also possible to form it so that it protrudes also outside the seating surface. Even in this case, the air accommodating portions 21 c of the pair of second air cells 20 attached to the rear end side of the seating surface protrude outward in the seating surface width direction with respect to the base member 40.

  Further, in the present embodiment, the second air cells 20 are provided on both sides in the seating surface width direction, and a part of the air accommodating portion 21b of the second air cell 20 protrudes outward with respect to the base member 40 in the seating surface width direction. I showed what I did. In contrast, as shown in FIG. 11, the third air cell 60 is detachably attached to the rear end side of the base member 40, and a part of the air accommodating portion of the third air cell is seated in the seating surface width direction. It is also possible to provide a lower projecting portion projecting downward in a part of the air accommodating portion projecting outward from the outside.

  In this case, the third air cell 60 is formed on the rear end side of the base member 40 with the third air cell 30 formed so as to protrude by an amount corresponding to the front-rear dimension of the seated person's buttocks and the front-rear dimension of the seating surface. By attaching, the contact area of each air cell 10, 20, 60 and the seated person's buttocks can be maximized. In addition, since the lower protrusion prevents the third air cell 60 from falling or tilting to the outside of the seating surface, the third air cell 60 reliably supports the seated person's buttocks. Furthermore, when the front and rear dimensions of the seated person's buttocks are different, or when the front and rear dimensions of the seating surface are different, only the amount according to the front and rear dimensions of the seated person's buttocks and the front and rear dimensions of the seating surface The third air cell 60 formed so as to protrude can be attached to the rear end side of the base member 40, and a plurality of types of base members having different dimensions depending on the size of the seated person's buttocks and the size of the seating surface There is no need to prepare 40. In this way, it is possible to provide a third air cell 60 that can be adapted to the size of the seated person's buttocks and the size of the seating surface without causing an increase in manufacturing cost, and an air cell cushion using the third air cell 60.

  In the present embodiment, each second air cell 20 is formed from an air bag 21 and a bottom member 22 to which an opening edge 21a of the air bag 21 is attached. On the other hand, it is also possible to configure each second air cell 20 only from the air bag 21 so that the opening edge portion 21a of the air bag 21 is detachably attached to the base member 40 by fitting or the like.

  Moreover, in this embodiment, what provided the recessed part 21d in the lower end of the lower side protrusion part 21c was shown. On the other hand, as shown in FIG. 12, it is also possible to provide a convex portion 21i instead of the concave portion 21d. Even in this case, when a force is applied to each second air cell 20 from the outside in the seating surface width direction. The lower end of the lower projection 21c is easily folded starting from the convex portion 21i, and the dimension of the lower projection 21c is smoothly reduced in the seating surface width direction.

  In the present embodiment, the concave portion 21e is formed so as to extend over substantially the entire seating surface in the air bag 21 in the front-rear direction. On the other hand, as shown in FIG. 13, it is also possible to provide the concave portion 21 e in a part of the air bag 21 in the front-rear direction of the seating surface. Even in this case, the downward force is applied to the upper surface of the second air cell 20. Since the air bag 21 of the second air cell 20 is softly crushed in the vertical direction starting from the concave portion 21e, compared to the case where the concave portion is not provided on the upper end side of the air accommodating portion 21b, It is extremely advantageous for softly supporting the film.

  Moreover, in this embodiment, what showed only one air accommodating part 21b which accommodates air inside each air bag 21 was shown. On the other hand, as shown in FIG. 14, two air accommodating portions 21 b are formed inside each air bag 21, and a part of the air accommodating portion 21 b located outside the seating surface width direction is part of the base member 40. It is also possible to form it so as to protrude outward in the seating surface width direction, and even in this case, the same effect as described above can be achieved.

  DESCRIPTION OF SYMBOLS 10 ... 1st air cell, 20 ... 2nd air cell, 21 ... Air bag, 21a ... Opening edge part, 21b ... Air accommodating part, 21c ... Lower side protrusion part, 21d ... Recessed part, 21e ... Recessed part, 22 ... Bottom member , 21a ... lower projection, 21b ... through hole, 30 ... front end side support member, 40 ... base member, 40a ... upper base member, b ... lower base member, c ... mounting hole, 41 ... hollow part, 42 ... Elastic member, 43 ... sensor, 50 ... pump, 60 ... third air cell, 100 ... cushion cover.

Claims (10)

An air cell attached to a plate-like base member and an air cell cushion provided with a plurality of air cells arranged so as to be aligned in a substantially horizontal direction and extending upward from the upper surface side of the base member. ,
The base member is configured to be detachably attached to the end in the width direction, and has at least one bag-like air accommodating portion capable of accommodating air therein. And a lower projecting portion projecting downward is provided in a part of the air accommodating portion projecting outward in the width direction with respect to the base member. Characteristic air cell. An air cell attached to a plate-like base member and an air cell cushion provided with a plurality of air cells arranged so as to be aligned in a substantially horizontal direction and extending upward from the upper surface side of the base member. ,
The base member is configured to be detachably attached to the rear end side of the base member, and has at least one bag-like air accommodating portion capable of accommodating air therein, and a part of the air accommodating portion when attached to the base member Is formed so as to protrude outwardly behind the seating surface with respect to the base member, and a lower protruding portion protruding downward is provided in a part of the air accommodating portion protruding outward. Air cell. Forming a portion projecting outward with respect to the base member in the air accommodating portion using a film made of a flexible material;
The said lower side protrusion part was formed by the part which the film | membrane of the lower end of the air accommodating part protruded on the said outer side with respect to the base member extended below. The Claim 1 or 2 characterized by the above-mentioned. Air cell. A part of the film constituting the lower end of the lower protruding part is formed in a concave shape at the lower end of the lower protruding part, or a part of the film constituting the lower end of the lower protruding part is directed downward. The air cell according to claim 3, wherein a concave portion or a convex portion is provided by forming a convex shape. Forming the air accommodating part using a film made of a flexible material;
A concave portion is provided on the upper end side of the air receiving portion on the inner side in the seating surface width direction by forming a part of the film constituting the side surface in a concave shape toward the outer side in the seating surface width direction. The air cell according to claim 1. A plate-like base member and a plurality of air cells arranged so as to be aligned in the substantially horizontal direction and extending upward from the upper surface side of the base member, and placed on a predetermined seating surface In the air cell cushion that supports the buttocks of the seated person,
At least one pair of air cells respectively disposed at both ends in the seating surface width direction among the air cells is detachably attached to both ends in the width direction of the base member, and at least one air capable of containing air therein. Each of the accommodating portions has a configuration in which a part of the air accommodating portion protrudes outwardly in the seating surface width direction with respect to the base member when attached to the base member.
An air cell cushion, wherein a part of the air accommodating portion protruding outward in the width direction is provided with a lower protruding portion protruding downward. A plate-like base member and a plurality of air cells arranged so as to be aligned in the substantially horizontal direction and extending upward from the upper surface side of the base member, and placed on a predetermined seating surface In the air cell cushion that supports the buttocks of the seated person,
Among the air cells, at least one air cell disposed at the rear end of the seating surface is detachably attached to the rear end side of the base member, and has at least one air accommodating portion capable of accommodating air therein. And when it is attached to the base member, a part of the air accommodating portion is configured to protrude outward from the seating surface to the base member,
An air cell cushion, characterized in that a lower projecting portion projecting downward is provided in a part of the air accommodating portion projecting outward on the rear side of the seating surface. Forming a portion projecting outward with respect to the base member in the air accommodating portion using a film made of a flexible material;
The said lower side protrusion part was formed by the part which the film | membrane of the lower end of the air accommodating part protruded on the said outer side with respect to the base member extended below. 8 or 7 characterized by the above-mentioned. Air cell cushion. A part of the film constituting the lower end of the lower protruding part is formed in a concave shape at the lower end of the lower protruding part, or a part of the film constituting the lower end of the lower protruding part is directed downward. The air cell cushion according to claim 8, wherein a concave portion or a convex portion is provided by forming a convex shape. Forming the air accommodating part using a film made of a flexible material;
A concave portion is provided on the upper end side of the air receiving portion on the inner side in the seating surface width direction by forming a part of the film constituting the side surface in a concave shape toward the outer side in the seating surface width direction. The air cell cushion according to claim 6.