cushion
The inflatable cushion with bent shape at the seat-backrest boundary addresses the complexity of setting conventional cushions by enabling easy compact storage and simple chair placement, offering stable support and posture maintenance.
Patent Information
- Application Number
- JP2021012839
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-01-29
- Publication Date
- 2024-12-18
- Estimated Expiration
- 2041-01-29
AI Technical Summary
Conventional cushions with seat and backrest portions are difficult to set on chairs due to their design, which requires complex alignment and hanging mechanisms, making them cumbersome to use.
A cushion with inflatable bags that form a bent shape at the boundary between the seat and backrest portions, allowing easy inflation and deflation to facilitate compact storage and simple chair placement.
The cushion can be easily made compact and set on a chair by inflating or deflating the bags, providing stable support and maintaining the user's posture through adjustable hardness and elastic forces.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a cushion. [Background technology]
[0002] Conventionally, cushions having a seat portion and a backrest portion are known. For example, the cushion described in the following Patent Document 1 is placed on a chair or sofa when used. The seat portion and the backrest portion of this cushion are provided with a plurality of cushion portions filled with cushioning material. The cushion portions are held together by cloth. When the cushion is not in use, it can be rolled up to make it compact. The cushion is provided with a front hanging portion and a rear hanging portion to hold it in a state conforming to the shape of a chair or the like. The front hanging portion hangs down to the front side of the seat of the chair or the like to hold the seat portion in a state conforming to the seat surface. The rear hanging portion hangs down to the rear side of the backrest of the chair or the like to hold the backrest portion in a state conforming to the front surface of the backrest. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Utility Model Registration No. 3194682 Summary of the Invention [Problem to be solved by the invention]
[0004] However, when setting a cushion with the above-mentioned configuration on a chair or the like, it is necessary to hang the front hanging part down on the front side of the seat of the chair or the like, place the seat part on the seat of the chair or the like, align the backrest part along the front side of the backrest of the chair or the like, and hang the rear hanging part down on the rear side of the backrest. Therefore, while it can be easily made compact, there is a problem that it is not easy to set it on a chair or the like.
[0005] The present invention was developed in view of the above circumstances, and an object of the present invention is to provide a cushion which can be easily made compact and can be easily set on a chair or the like. [Means for solving the problem]
[0006] The cushion of the present invention is a cushion having a seat portion and a backrest portion, and is provided with a plurality of bags that can be inflated by pouring a fluid into them, and when the bags are inflated, they assume a bent shape at the boundary between the seat portion and the backrest portion. Effect of the Invention
[0007] According to the present invention, the cushion can be easily made compact by releasing the fluid from the bag. By filling the bag with fluid, the cushion takes on a bent shape at the boundary between the seat and backrest. The cushion in a bent shape at the boundary between the seat and backrest can be set simply by placing it on a chair or the like. Therefore, the cushion can be easily made compact and can be easily set on a chair or the like. [Brief description of the drawings]
[0008] [Figure 1] FIG. 1 is a perspective view showing a cushion according to the present embodiment set on a chair; [Diagram 2] A plan view showing a flat cushion [Diagram 3] A plan view showing a cushion shaped like a seat [Figure 4] A front view showing a cushion like a seat [Diagram 5] Rear view showing the seat cushion [Figure 6] A side view showing a cushion shaped like a seat DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0009] A preferred embodiment of the present invention is described below.
[0010] In the cushion of the present invention, the plurality of bags may include a pair of first bags located at both left and right ends of the boundary, the first bags having an edge on the seat side and an edge on the backrest side, and the edge on the seat side and the edge on the backrest side may extend in a direction approaching each other from both left and right ends of the boundary toward the center. With this configuration, by pouring fluid into the pair of first bags, the seat side and the backrest side automatically bend at the boundary. Therefore, the cushion can easily be made into a chair shape.
[0011] The cushion of the present invention may also include a surface member and a back member, and the elasticity of the surface member may be greater than that of the back member. With this configuration, the surface member and the back member stretch elastically when fluid is poured into the bag. The cushion is bent by the elasticity of the surface member so that the surface member is on the inside and the back member is on the outside. This makes it easy to arrange the surface member on the side that contacts the seated person and the back member on the opposite side to the side that contacts the seated person.
[0012] In addition, in the cushion of the present invention, when the bag body is in an inflated state, the left and right ends of the backrest may be arranged to stand forward. With this configuration, the left and right edges of the backrest can support the back of the seated person from both the left and right sides. This makes it easier to stabilize the posture of the seated person.
[0013] In the cushion of the present invention, the left and right ends of the seat portion may be configured to stand up when the bag body is in an inflated state. With this configuration, the left and right edges of the seat portion can support the buttocks of the seated person from both the left and right sides. This makes it easier to stabilize the posture of the seated person.
[0014] In addition, in the cushion of the present invention, the plurality of bags may include a second bag and a third bag provided in the seat portion, the second bag being located at the rear edge of the seat portion, the third bag being located forward of the second bag, and the bag portion may have an upwardly expanding dimension larger than an upwardly expanding dimension of the third bag in an inflated state. With this configuration, the second bag of the seat portion can easily support the pelvis of the seated person from the rear lower side. Therefore, the pelvis of the seated person can be easily maintained in an upright state.
[0015] <Example> An embodiment of the present invention will be described in detail below with reference to Figs. 1 to 6. The cushion 10 in this embodiment includes a plurality of bags 20 that expand and contract by letting air in and out. By letting air into the bags 20, the bags 20 become inflated.
[0016] The cushion 10, with air filled in the bag body 20, is used by setting it on a chair 100 as shown in Fig. 1. The chair 100 is a seat on a bus, a bullet train, or the like. The chair 100 has a seat surface 101, a backrest 102, and left and right armrests 103. Note that Fig. 1 shows only the armrest 103 on one side to make it easier to see the shape of the cushion 10.
[0017] In the following, the positive side of the X axis in Fig. 1 will be referred to as the front side, the negative side of the X axis in Fig. 1 as the rear side, the positive side of the Y axis in Fig. 1 as the upper side, the negative side of the Y axis in Fig. 1 as the lower side, the positive side of the Z axis in Fig. 1 (the right side when facing the cushion 10 in a state where it is set in the chair 100) as the right side, and the negative side of the Z axis in Fig. 1 (the left side when facing the cushion 10 in a state where it is set in the chair 100) as the left side. Also, the side facing the waist and buttocks of a seated person will be referred to as the front side, and the opposite side will be referred to as the back side.
[0018] The cushion 10 has a seat portion 11 and a backrest portion 12. When the bag body 20 is inflated, the cushion 10 is bent at a boundary portion 13 between the seat portion 11 and the backrest portion 12. Hereinafter, the shape in which the seat portion 11 and the backrest portion 12 are bent at the boundary portion 13 will be referred to as a chair shape. A chair is a tool used for sitting, has no legs, and is basically composed of a seat (a surface on which the buttocks are placed) and a backrest. The seat portion 11 is placed on the seat surface 101 of the chair 100. The backrest portion 12 is disposed in front of the backrest 102 of the chair 100. The cushion 10 set in the chair 100 is fitted between the left and right armrests 103. The front end of the seat portion 11 is located behind the front end of the seat surface 101. The backrest portion 12 is located at the lower end of the backrest 102. The upper end of the backrest portion 12 is located at the same height as the armrests 103. The boundary portion 13 is located at the rear end of the seat surface 101.
[0019] The cushion 10 is covered with a cover member (not shown). The cover member is in the shape of a bag that contains the cushion 10. The cover member is detachable from the cushion 10.
[0020] Each bag body 20 is formed by dividing a front surface member 16 and a back surface member 17, which will be described later, by fastening portions 18. Each bag body 20 has an air vent 15. The bag body 20 in the inflated state has cushioning properties. The thickness dimension (dimension in the front-to-back direction) and hardness of the bag body 20 in the inflated state can be adjusted by adjusting the internal pressure of the bag body 20. The bag body 20 in the inflated state supports the waist and buttocks of a seated person at appropriate positions.
[0021] By releasing the air from the bag body 20, the bag body 20 is put into a contracted state. When the bag body 20 is in a contracted state, the cushion 10 is flattened (see FIG. 2). The flattened cushion 10 is referred to as a cushion sheet 10S. The thickness dimension of the cushion sheet 10S is equal to the thickness dimension of the surface member 16 and the back member 17, which will be described later, stacked together. In the cushion sheet 10S, the entire surfaces of the surface member 16 and the back member 17 are in almost contact with each other. The cushion sheet 10S is easily deformed. The cushion sheet 10S can be made compact by, for example, rolling or folding.
[0022] Cushion 10 in the shape of a seat is bent at boundary 13 between seat surface 11 and backrest 12. The angle between seat surface 11 and backrest 12 on the front side is 180 degrees or less (approximately 120 degrees to 140 degrees). When a person sits on cushion 10 in the shape of a seat, it curves to fit the curved surface of the human body.
[0023] The cushion 10 comprises a surface member 16 and a back member 17. The surface member 16 forms the entire surface (the surface facing the waist and buttocks of a seated person). The back member 17 forms the entire back surface (the surface facing the chair 100). The surface member 16 forms the front surface of the bag body 20. The back member 17 forms the back surface of the bag body 20. Air is placed between the surface member 16 and the back member 17. The back member 17 is provided with an anti-slip surface.
[0024] The front surface member 16 and the back surface member 17 are both in the form of a single sheet. The front surface member 16 and the back surface member 17 have the same outer shape. The area of the back surface member 17 is equal to the area of the back surface member 17. The front surface member 16 and the back surface member 17 are partially fixed and integrated. The fixing is performed by welding. The front surface member 16 and the back surface member 17 are divided into multiple bags 20 by fixing parts 18 that fix the front surface member 16 and the back surface member 17.
[0025] The elastic force of the front surface member 16 is greater than that of the back surface member 17. The front surface member 16 and the back surface member 17 are formed, for example, by laminating an elastomer layer on a fabric. At the fixing portion 18, for example, the elastomer layers can be welded together. For example, polyester, polyurethane, nylon, etc. can be used as the fabric material of the front surface member 16. For example, cotton can be used as the fabric material of the back surface member 17. For example, a urethane-based thermoplastic elastomer (TPU) can be used as the elastomer layer.
[0026] 1, the plurality of bags 20 include a first bag 21, a second bag 22, a third bag 23, a fourth bag 24, a fifth bag 25, a sixth bag 26, and a seventh bag 27. The first bag 21 is provided in the boundary portion 13. The second bag 22, the third bag 23, and the fourth bag 24 are provided in the seat portion 11. The fifth bag 25, the sixth bag 26, and the seventh bag 27 are provided in the backrest portion 12. The bags 20 will be described in detail later.
[0027] As shown in Fig. 2, the cushion sheet 10S is symmetrical with respect to the center in the left-right direction. In the cushion sheet 10S, the backrest portion 12 and the seat portion 11 are arranged on the same plane. The length dimension from a second boundary fixing portion 38B (described later) to the rear end of the cushion sheet 10S is smaller than the length dimension from the second boundary fixing portion 38B (described later) to the front end of the cushion sheet 10S.
[0028] The outer edge 30 of the cushion sheet 10S is curved and has a rear edge 32, left and right side edges 33, and a front edge .
[0029] The rear edge 32 of the cushion sheet 10S has two rear edge bulges 32A and one rear edge recess 32B. The rear edge recess 32B is located between the rear edge bulges 32A. Both left and right ends of the rear edge 32 of the cushion sheet 10S protrude further rearward than the center. By providing the rear edge recess 32B, both left and right portions of the cushion sheet 10S (portions where the rear edge bulges 32A are provided) are easily bent from the front end (the most recessed portion) of the rear edge recess 32B as a base point.
[0030] Each side edge 33 of the cushion sheet 10S has three side edge bulges 33A and two side edge recesses 33B. Each side edge recess 33B is located between the side edge bulges 33A. By providing the side edge recesses 33B, the front and rear portions of the side edge recess 33B (portions where the side edge bulges 33A are provided) are easily bent with the side edge recess 33B as a base point. Of the three side edge bulges 33A, the side edge bulge 33A located in the center in the front-to-rear direction protrudes more to the left and right than the front and rear side edge bulges 33A.
[0031] The front edge 34 of the cushion sheet 10S has two front edge bulges 34A and one front edge recess 34B. The front edge recess 34B is located between the front edge bulges 34A. The left and right ends of the front edge 34 of the cushion sheet 10S protrude further forward than the center.
[0032] The four corners 31 of the cushion sheet 10S are arc-shaped. The radius of the corners 31 on the front side of the cushion sheet 10S is larger than the radius of the corners 31 on the rear side of the cushion sheet 10S.
[0033] The fixing portion 18 includes an outer edge fixing portion 35, a seat fixing portion 36, a backrest fixing portion 37, and a boundary fixing portion 38. The outer edge fixing portion 35 extends around the entire outer edge 30 of the cushion sheet 10S.
[0034] The seat fixing portion 36 extends in the front-rear direction. The front end of the seat fixing portion 36 is connected to the outer edge fixing portion 35. A plurality of the seat fixing portions 36 are arranged in the left-right direction. Between the seat fixing portions 36 adjacent to each other in the left-right direction, the third bag body 23 is formed. The third bag body 23 has an elongated shape in the front-rear direction. A plurality of the third bag bodies 23 are provided. The plurality of third bag bodies 23 are arranged in the left-right direction. A fourth bag body 24 is formed between the seat fixing portions 36 located at the left and right ends of the plurality of seat fixing portions 36 and the outer edge fixing portion 35. The fourth bag body 24 is provided at both the left and right ends of the seat portion 11. The dimension of the fourth bag body 24 in the left-right direction is larger than the dimension of the third bag body 23 in the left-right direction. At a midpoint in the extending direction of the seat surface fixing portion 36, an air vent 15 is formed which connects adjacent third bags 23 to each other or connects the third bag 23 to the fourth bag 24.
[0035] The backrest fixing portion 37 has a first backrest fixing portion 37A and a second backrest fixing portion 37B. The first backrest fixing portion 37A is curved in the front-rear direction and extends in the left-right direction. The first backrest fixing portion 37A has a shape that expands in the left-right direction from the rear to the front when the cushion sheet 10S is viewed in a plan view. The left-right center of the first backrest fixing portion 37A is close to the outer edge fixing portion 35 of the rear edge recessed portion 32B. A sixth bag body 26 is formed in front of the first backrest fixing portion 37A. A seventh bag body 27 is formed behind the first backrest fixing portion 37A. The seventh bag body 27 is provided between the left and right fifth bags 25. The seventh bag body 27 is divided into one that is long in the front-rear direction and one that is triangular. A ventilation hole 15 that connects the sixth bag body 26 and the seventh bag body 27 is formed in the rear end portion of the first backrest fixing portion 37A.
[0036] The second backrest fixing portion 37B extends in the front-rear direction. The front end of the second backrest fixing portion 37B is connected to the first backrest fixing portion 37A. A plurality of second backrest fixing portions 37B are arranged in the left-right direction. A fifth bag body 25 is formed between the second backrest fixing portions 37B located at the left and right ends of the plurality of second backrest fixing portions 37B and the outer edge fixing portion 35 of the corner portion 31. The fifth bag body 25 is provided at both the left and right ends of the backrest portion 12. The second backrest fixing portion 37B has ventilation holes 15 that communicate between adjacent seventh bag bodies 27 and between the seventh bag body 27 and the fifth bag body 25.
[0037] The boundary fixing portion 38 has a first boundary fixing portion 38A and a second boundary fixing portion 38B. The first boundary fixing portion 38A is provided in a front-rear pair at both the left and right ends of the boundary portion 13. The first boundary fixing portion 38A is connected to the outer edge fixing portion 35 of the side edge recessed portion 33B. The first bag body 21 is formed inside the pair of front-rear first boundary fixing portions 38A. The front first boundary fixing portion 38A forms an edge 40 of the first bag body 21 on the seat surface portion 11 side. The rear first boundary fixing portion 38A forms an edge 41 of the first bag body 21 on the backrest portion 12 side.
[0038] The first bag body 21 has a triangular shape. The first bag body 21 is disposed between the fourth bag body 24 and the fifth bag body 25. The edge 40 on the seat surface portion 11 side and the edge 41 on the backrest portion 12 side extend in a direction approaching each other from both left and right ends of the boundary portion 13 toward the center. An air vent 15 is formed between the tip of the edge 40 on the seat surface portion 11 side and the tip of the edge 41 on the backrest portion 12 side.
[0039] The second boundary fixing portion 38B extends linearly in the left-right direction. The left and right ends of the second boundary fixing portion 38B are located between the pair of front and rear first boundary fixing portions 38A. The second bag body 22 is formed between the second boundary fixing portion 38B and the rear end of the seat fixing portion 36. The second bag body 22 is provided in the left-right central portion of the rear edge portion of the seat portion 11. The second bag body 22 extends long in the left-right direction. The left-right length dimension of the second bag body 22 is greater than the front-back length dimension of the second bag body 22. The front-back dimension of the left-right central portion of the second bag body 22 is greater than the front-back dimension of both left-right ends of the second bag body 22.
[0040] Between the second boundary fixing portion 38B and the first backrest fixing portion 37A, a sixth bag body 26 is formed. The sixth bag body 26 is provided in the left-right center of the backrest portion 12. The sixth bag body 26 has a triangular shape.
[0041] The cushion 10 includes a pump 42 and a plug 43. The pump 42 and the plug 43 are provided in the bag body 20. The pump 42 is provided in the first bag body 21 on the left side. The plug 43 is provided in the first bag body 21 on the right side. The pump 42 and the plug 43 are fixed to the surface member 16. The pump 42 sends gas into the bag body 20 when pressed. Bag bodies 20 not provided with a pump 42 communicate with the pump 42 via the ventilation hole 15. Air is sent to all the bags 20 by one pump 42. The plug 43 closes the air vent hole so that air does not escape from the bag body 20. Air can be vented from the bag body 20 by opening the plug 43.
[0042] Next, the shape of the cushion 10, which is shaped like a seat chair by filling the bag body 20 with air, will be described. As shown in FIG. 1, the end side in the left-right direction of the backrest portion 12 stands forward. The fifth bag body 25 is inflated more than the seventh bag body 27. The surface of the fifth bag body 25 is located forward of the surface of the seventh bag body 27. The left end of the fifth bag body 25 on the left side is located forward of the right end. The right end of the fifth bag body 25 on the right side is located forward of the left end. The surface of the fifth bag body 25 faces diagonally inward (toward the center in the left-right direction) forward. The surface of the sixth bag body 26 is located forward of the surface of the seventh bag body 27. The first bag body 21 stands up. The surface of the first bag body 21 faces inward in the left-right direction. The upward expansion dimension of the second bag body 22 is greater than the upward expansion dimension of the third bag body 23.
[0043] Next, the shape of the cushion 10 in the shape of a seat chair will be described in plan view. As shown in Fig. 3, the left-right dimension of the cushion 10 decreases from the rear side to the front side. The left-right dimension of the cushion 10 is smaller than the left-right dimension of the cushion sheet 10S. The outer edge 30 of the cushion 10 is pleated with multiple creases.
[0044] Next, the shape of the cushion 10 in the form of a seat chair will be described when viewed from the front. As shown in FIG. 4, the vertical dimension of the cushion 10 is smaller than the horizontal dimension of the cushion 10. The horizontal dimension of the cushion 10 increases from the top to the bottom. The backrest portion 12, the left and right first bags 21, and the left and right fourth bags 24 rise upward with respect to the central region of the seat portion 11. The backrest portion 12, the left and right first bags 21, and the left and right fourth bags 24 form a wall surrounding the central region of the seat portion 11. The rear corners 31 of the cushion 10 protrude upward from the left and right first bags 21. The height dimension gradually decreases from the rear corners 31 toward the rear edge recessed portion 32B.
[0045] Both ends of the seat portion 11 in the left-right direction stand upward. The fourth bag body 24 stands upward relative to the third bag body 23. The fourth bag body 24 and the third bag body 23 are bent at the seat fixing portion 36. The surface of the fourth bag body 24 faces diagonally inward (toward the center in the left-right direction). The front edge 34 of the seat portion 11 is curved in a bow shape so that the center in the left-right direction is located higher than the ends.
[0046] Next, the shape of the cushion 10 in the form of a seat will be described when viewed from the back. As shown in Fig. 5, the back surfaces of the first bag bodies 21 on the left and right sides are inclined outward in the left-right direction from the bottom to the top. The bottom surface of the second bag body 22 extends approximately horizontally.
[0047] Next, the shape of the cushion 10 in the form of a seat chair will be described in a side view. As shown in FIG. 6, the side edge 33 of the cushion 10 rises from the front corner 31 to the rear corner 31. The rear corner 31 is located at the highest position. The underside of the cushion 10 is bent at the boundary portion 13. The underside of the backrest portion 12 is inclined upward toward the rear. The underside of the backrest portion 12 and the underside of the seat portion 11 form an angle smaller than 180 degrees (approximately 120 degrees to 140 degrees). The underside of the sixth bag body 26 protrudes rearward beyond the underside of the fifth bag body 25.
[0048] Next, an example of how the cushion 10 is used will be described. First, the bag body 20 is inflated. The pump 42 is pressed to put air into the bag body 20. Each time the pump 42 is pressed, air is put into the bag body 20. As the bag body 20 inflates, the first bag body 21, the fifth bag body 25, and the fourth bag body 24 rise up so as to face the center in the left-right direction. The seventh bag body 27 and the fifth bag body 25 bend forward and toward the center in the left-right direction with the first backrest fixing portion 37A as a base point. Due to the presence of the rear edge recessed portion 32B, both the left and right sides of the backrest portion 12 are easily bent forward. The fifth bag body 25 and the fourth bag body 24 are displaced in a direction approaching each other with the first boundary fixing portion 38A as a base point. Due to the presence of the side edge recessed portion 33B, the backrest portion 12 and the seat portion 11 are easily bent. The backrest portion 12 and the seat portion 11 bend at the boundary portion 13. In this way, the cushion 10 naturally bends into a chair shape. At this time, the front surface member 16 is on the inside and the back surface member 17 is on the outside. The amount of air in the bag body 20 is adjusted to adjust the hardness of the bag body 20. If the bag body 20 is not hard enough, the pump 42 is pressed to send air into the bag body 20. If the bag body 20 is too hard, the plug 43 is opened to release the air from the bag body 20.
[0049] Next, the cushion 10 in the shape of a seat is set on the chair 100. Setting of the cushion 10 on the chair 100 is completed simply by placing the cushion 10 on the seat surface 101. The cushion 10 is held on the chair 100 in an appropriate posture.
[0050] Next, the seated person sits on the cushion 10. The second bag body 22 can support the lower part of the seated person's sacrum from below. This keeps the seated person's pelvis in an upright position. The left and right fifth bag bodies 25 can support the left and right sides of the seated person's lower back from behind. The first backrest fixing part 37A prevents sudden air movement in the left and right direction in the backrest part 12, so the seated person's lower back is stably supported. In addition, the backrest part 12 has a portion that is easily bent determined by the first backrest fixing part 37A, so that differences in the feeling of use due to differences in the surface shape of the chair and the displacement of the cushion 10 when installed on the chair can be eliminated. The left and right fourth bag bodies 24 can support the left and right sides of the seated person's buttocks from below. This keeps the seated person's lower back and buttocks in a correct position. The third bag body 23 is aligned with the direction in which the seated person's legs extend. In addition, a plurality of third bags 23 are provided. This distributes body pressure (pressure transmitted from the seat surface portion 11 to the buttocks and thighs), improving the sitting comfort of the seated person.
[0051] When the use of the cushion 10 is finished, the plug 43 is opened to release the air from the bag body 20. This makes it possible to easily crush the bag body 20. By crushing the bag body 20, the cushion 10 becomes a sheet. The cushion sheet 10S can be easily folded or rolled up to make it compact. The cushion sheet 10S, which has been folded up into a compact size, can be easily carried or stored.
[0052] Next, the operation and effect of the embodiment configured as described above will be described. The cushion 10 of this embodiment has a seat portion 11 and a backrest portion 12. The cushion 10 is provided with a plurality of bags 20 that can be inflated by introducing air. When the bags 20 are in an inflated state, the cushion 10 is bent at the boundary portion 13 between the seat portion 11 and the backrest portion 12.
[0053] According to this configuration, the cushion 10 can be easily made compact by releasing air from the bag body 20. The cushion 10 becomes like a seat chair by putting fluid into the bag body 20. The seat chair-shaped cushion 10 can be set simply by placing it on a chair 100 or the like. Therefore, the cushion 10 can be easily made compact, and can be easily set on a chair 100 or the like.
[0054] The plurality of bags 20 include a pair of first bags 21 located at both left and right ends of the boundary portion 13. The first bag 21 has an edge 40 on the seating surface 11 side and an edge 41 on the backrest 12 side. The edge 40 on the seating surface 11 side and the edge 41 on the backrest 12 side extend in a direction approaching each other from both left and right ends of the boundary portion 13 toward the center. With this configuration, by introducing air into the pair of first bags 21, the seating surface 11 and the backrest 12 automatically bend at the boundary portion 13. Therefore, the cushion 10 can easily be shaped like a seat chair.
[0055] The cushion 10 includes a surface member 16 and a back member 17. The elasticity of the surface member 16 is greater than that of the back member 17. With this configuration, the surface member 16 and the back member 17 stretch elastically by putting air into the bag body 20. The cushion 10 bends due to the elasticity of the surface member 16 so that the surface member 16 is on the inside and the back member 17 is on the outside. This makes it easy to arrange the surface member 16 on the side that contacts the seated person and the back member 17 on the opposite side to the side that contacts the seated person.
[0056] When the bag body 20 is inflated, the left and right ends of the backrest 12 stand forward. With this configuration, the left and right edges of the backrest 12 can support the back of the seated person from both the left and right sides. This makes it easier to stabilize the posture of the seated person.
[0057] When the bag body 20 is inflated, the left and right ends of the seating surface portion 11 stand on the upper side. With this configuration, the left and right edges of the seating surface portion 11 can support the buttocks of the seated person from both the left and right sides. This makes it easier to stabilize the posture of the seated person.
[0058] The plurality of bags 20 include a second bag 22 and a third bag 23 provided in the seat portion 11. The second bag 22 is located at the rear edge of the seat portion 11. The third bag 23 is located forward of the second bag 22. When the bag 20 is inflated, the upward bulging dimension of the second bag 22 is larger than the upward bulging dimension of the third bag 23. With this configuration, the second bag 22 of the seat portion 11 can easily support the pelvis of the seated person from the lower rear side. Therefore, the pelvis of the seated person can easily be kept in an upright position.
[0059] <Other Examples> The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments are also included within the technical scope of the present invention. (1) In the above embodiment, the cushion 10 is set on the chair 100. However, the present invention is not limited to this, and the cushion may be placed on the floor of a room, a sofa, or the like. (2) The chair 100 in the above embodiment is a seat in a bus, a bullet train, etc. The chair is not limited to this, and may be a seat in a stadium, etc. (3) In the above embodiment, the specific configuration (size, shape, number, etc.) of the bag body 20 is exemplified, but the configuration of the bag body can be changed. (4) In the above embodiment, the pump 42 is provided in the first bag 20. However, the present invention is not limited to this and the position of the pump can be changed. (5) In the above embodiment, the pump 42 is provided on the surface of the cushion 10. However, the present invention is not limited to this, and the pump may be provided on the back surface of the cushion. (6) In the above embodiment, one pump 42 is provided, but the present invention is not limited to this, and two or more pumps may be provided. (7) In the above embodiment, air is let in and out of the bag 20. However, this is not limiting, and gas, liquid, beads, etc. may be let in and out of the bag. (8) In the above embodiment, the fixing is performed by welding, but the fixing is not limited to this and may be performed by other means such as adhesion. (9) In the above embodiment, the pump 42 is a hand pump. However, the pump is not limited to this, and may be an electric fan or may be integrated with a stopper. The pump may also be an air pump separate from the main body. (10) In the above embodiment, the front surface and the back surface of the cushion 10 are formed by the front surface member 16 and the back surface member 17. This is not limiting, and the front surface and the back surface of the cushion may be formed, for example, by folding a single piece of fabric. The front surface and the back surface of the cushion may also be formed by a seamless member such as a balloon (such as an air cell manufactured by blow molding, etc.). In this case, multiple bags may be formed by partially bonding the opposing surfaces of the front surface and the back surface to each other. (11) In the above embodiment, each bag 20 is formed by dividing the front surface member 16 and the back surface member 17 by the fastening portion 18. However, the bag may be manufactured separately and connected to form a single cushion. The connection method may be, for example, by fastening the bag to each other or by collectively fixing a plurality of bags to a single piece of fabric. [Explanation of symbols]
[0060] 10. Cushion 11... Seat part 12…Backrest 13...Border 16…Surface material 17…Back material 20...Bag body 21...First bag body 22...Second bag body 23…Third bag body 40…Edge of seat side 41…Backrest side edge
Claims
1. A cushion having a seat portion and a backrest portion, The device includes a plurality of bags that can be inflated by introducing a fluid thereinto, When the bag body is inflated, the boundary between the seat portion and the backrest portion is bent, The plurality of bags include a pair of first bags located at both left and right ends of the boundary portion, The first bag body has an edge on the seat surface portion side and an edge on the backrest portion side, The edge of the cushion on the seat side and the edge of the cushion on the backrest side extend in a direction approaching each other from both left and right ends of the boundary portion toward the center.
2. A front surface member and a back surface member are provided, The cushion according to claim 1 , wherein the elasticity of the surface member is greater than the elasticity of the back member.
3. 3. The cushion according to claim 1, wherein, when the bag body is inflated, a left-right end of the backrest portion stands forward.
4. The cushion according to claim 1 , wherein, when the bag body is inflated, the left-right ends of the seat portion stand upright.
5. The plurality of bags include a second bag and a third bag provided on the seat portion, The second bag is located at a rear edge of the seat portion, The third bag body is located forward of the second bag body, The cushion according to claim 1 , wherein, in an inflated state of the bag body, an upward expansion dimension of the second bag body is larger than an upward expansion dimension of the third bag body.
Citation Information
Patent Citations
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