JP5247414B2 - cushion - Google Patents

Description

  The present invention relates to a cushion, and more particularly to a cushion that is deformed by pressure applied by a user sitting.

Conventionally, cushions filled with air have been used to improve posture comfort and improve sitting comfort. For example, Japanese Patent Application Laid-Open No. 2002-272563 (Patent Document 1) describes an air cushion which has two or more air chambers juxtaposed in the left-right direction and communicates with each other at a communicating portion in which each air chamber is narrowed. . The air cushion disclosed in Patent Document 1 has a symmetrical shape in the left-right direction and the front-rear direction.
JP 2002-272563 A

  The air cushion described in Patent Document 1 describes that the air pressure in the communicating air chamber is balanced and stably supported by air moving from the communicating portion through the air chamber. However, from the shape of the air cushion disclosed in Patent Document 1 and the position of the connecting portion, the present inventor has found that it is difficult to maintain the pelvis standing when sitting on the air cushion.

  Here, it will be described that it is necessary to maintain the pelvis standing. If the pelvis is tilted backwards, the correct S-curvature of the spinal cord is not maintained and a burden is placed on the waist, which is one of the causes of back pain when sitting for a long time. Therefore, it is necessary to keep the pelvis standing in order to sit in a posture with less burden on the waist.

  Then, an object of this invention is to provide the cushion which can maintain the state which the pelvis stood.

  A cushion according to one aspect of the present invention is a cushion that is deformed by pressurization by a user sitting, and includes a left air chamber, a right air chamber, and a communication passage. The left air chamber and the right air chamber can be filled with air. The communication passage allows the left air chamber and the right air chamber to communicate with each other, and allows the air filled in the left air chamber and the right air chamber to move relative to each other. In the left air chamber and the right air chamber, the maximum width behind the center line passing through the center in the front-rear direction and extending in the left-right direction is larger than the maximum width on the front side than the center line.

In the cushion , each of the left air chamber and the right air chamber includes an upper seat, a lower seat, and a connecting portion that connects the upper seat and the lower seat and has flexibility. Each of the connecting portions is arranged so that the center is positioned in front of a center line extending in the front-rear direction of the left air chamber and the right air chamber and extending in the left-right direction.

  The connecting portion may be an internal air chamber that is disposed inside the left air chamber and the right air chamber and that can exchange air inside the left air chamber and the right air chamber.

  In the left air chamber and the right air chamber, the maximum width behind the center line may be larger than the maximum width before the center line.

  Each of the left air chamber and the right air chamber may gradually narrow in width from the maximum width portion toward the front side in the front-rear direction.

The communication path may be positioned between the left air chamber and the right air chamber and may be positioned on the middle line.
The left air chamber and the right air chamber may be symmetrical with respect to an axis orthogonal to the direction in which the communication path extends.

  A connecting portion that connects the left air chamber and the right air chamber may be further provided between the left air chamber and the right air chamber, and a communication path may be provided on the connecting portion.

  You may further provide the cover part which covers the said left air chamber, the right air chamber, and a communicating path.

  In the cushion according to one aspect of the present invention, since the maximum width on the front side is narrower than the maximum width on the rear side, when the user is seated so that the thighs are located on the front side and the buttocks are located on the rear side, The back side rises more than the front side. That is, when the user is seated, the buttock becomes higher than the thigh. Thereby, a user's pelvis can be maintained in the standing state.

If the cushion of the present invention through the longitudinal center of the left air chamber and the right air chamber, and the center to the front than the middle line extending in the lateral direction is provided with a connecting portion which is arranged so as to be located, When the user is seated so that the thighs are located on the front side and the buttocks are located on the rear side, the front side is prevented from rising due to this connecting portion. That is, the rear side is raised more than the front side, and the hips are higher than the thighs. Thereby, a user's pelvis can be maintained in the standing state.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a top view schematically showing a cushion according to Embodiment 1 of the present invention. FIG. 2 is a top view schematically showing an enlarged left air chamber constituting the cushion according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 (A) to 5 (C) are perspective views schematically showing a connecting portion constituting the cushion according to Embodiment 1 of the present invention. With reference to FIGS. 1-5, the cushion 10 in one embodiment of this invention is demonstrated. The cushion 10 in the present embodiment is deformed by pressurization due to the seating of the user.

  As shown in FIGS. 1 and 2, the cushion 10 mainly includes a left air chamber 11, a right air chamber 12, a communication path 13, a connection portion 14, and connection portions 15 and 16.

  The left air chamber 11 and the right air chamber 12 can be filled with air. The left air chamber 11 is located on the left hip and the left thigh when the user is seated on the cushion 10, and the right air chamber 12 is located on the right hip and the right thigh when the user is seated on the cushion 10. Is located. Further, in FIG. 1, when the user sits on the cushion 10 so that the thigh is located on the lower side and the buttock is located on the upper side, the direction in which the thigh is located is forward and the buttock is located. The direction is behind.

In the left air chamber 11 and the right air chamber 12, the maximum widths W11b and W12b on the rear side of the middle line X that passes through the center in the front-rear direction and extend in the left-right direction are the maximum widths W11a on the front side of the middle line X. , Larger than W12a. In other words, in the left air chamber 11 and the right air chamber 12, the maximum width W11b, W12 b of the rear end portion, the maximum width W11a of the front end, wider than W12a. In other words, the maximum width W10b of the rear end portion of the cushion 10 is wider than the maximum width W10a of the front end portion.

  Here, as shown in FIG. 1, the front-rear direction and the left-right direction are orthogonal to each other. Further, the “center in the front-rear direction” refers to the midpoint of the maximum length extending in the front-rear direction of the left air chamber 11 and the right air chamber 12. Further, the front end portion of the cushion 10 refers to the front side from the middle line X, and the rear end portion of the cushion 10 refers to the rear side from the middle line X.

Each of the left air chamber 11 and the right air chamber 12 preferably has a width that gradually decreases from the maximum width (width W1 2b , W11b) toward the front side in the front-rear direction. In other words, each of the left air chamber 11 and the right air chamber 12 does not include a portion whose width increases from the rear side toward the maximum width portion in the front-rear direction. In other words, the width of each of the left air chamber 11 and the right air chamber 12 in the front-rear direction monotonously increases from the front side toward the maximum width portion.

  Moreover, it is preferable that the left air chamber 11 and the right air chamber 12 have substantially the same shape. Further, the left air chamber 11 and the right air chamber 12 may have a symmetrical shape with respect to the axis Y orthogonal to the direction in which the communication passage 13 extends. When the communication path 13 is a curve, the direction in which the communication path 13 extends refers to the direction indicating the shortest distance of the communication path 13. In addition, the axis | shaft Y passes through the midpoint in the maximum length extended in the left-right direction of the cushion 10, and is extended in the front-back direction.

  As shown in FIGS. 3 and 4, the left air chamber 11 has a bag shape, for example, and includes an upper sheet 11 a and a lower sheet 11 b. Air can be filled between the upper sheet 11a and the lower sheet 11b. The right air chamber 12 has the same configuration as the left air chamber 11.

  The communication path 13 allows the left air chamber 11 and the right air chamber 12 to communicate with each other, and the air filled in the left air chamber 11 and the right air chamber 12 can move with respect to each other. The communication path 13 is located between the left air chamber 11 and the right air chamber 12. The communication path 13 is located behind the middle line X.

  The communication path 13 is, for example, a tube that connects a region facing the right air chamber 12 in the left air chamber 11 and a region facing the left air chamber 11 in the right air chamber 12. When the communicating path 13 is a tube, the inner diameter of the tube is, for example, 2 mm to 8 mm. When the inner diameter of the tube is 2 mm or more, it is possible to suppress the resistance of the air flowing through the tube from becoming too large. When the inner diameter of the tube is 8 mm or less, it is possible to suppress the resistance of air flowing through the tube from becoming too small. Therefore, by setting the inner diameter of the tube 10 within the above range, an appropriate load can be applied to the muscle while maintaining a sense of stability.

  The communication path 13 is not limited to a tube, and may be a gap provided in the connection portion 14 or the like. Moreover, the communication path 13 may be one and multiple may be provided.

  The connecting portion 14 is located between the left air chamber 11 and the right air chamber 12 and connects the left air chamber 11 and the right air chamber 12. The connection part 14 is thin, for example, is a sheet-like member. For this reason, the left air chamber 11 and the right air chamber 12 can have a clear step.

  The communication path 13 may be provided on the connection portion 14. In the present embodiment, a tube that is a communication path is fixed on the connection portion 14.

  The connecting portion 15 connects the upper sheet 11a and the lower sheet 11b in the left air chamber 11 (see FIGS. 3 and 4) and has flexibility. As shown in FIG. 2, the connecting portion 15 is disposed so that the center O is positioned in front of the middle line X that passes through the center of the left air chamber 11 in the front-rear direction and extends in the left-right direction. In other words, the distance R1 from the rear side to the middle line X is smaller than the distance R2 from the front side to the middle line X in the axis line passing through the center O of the connecting portion 15 or the like. The connection part 16 has the same configuration as the connection part 15. That is, the connecting portion 16 connects the upper seat and the lower seat in the right air chamber 12 and has flexibility, and passes through the center in the front-rear direction of the right air chamber 12 and extends in the left-right direction. It is arranged so that the center is located in front of the center line X. The connecting portions 15 and 16 are members that suppress an increase in height on the front side when the user is seated on the cushion 10.

  Here, the center O of the connecting portion 15 is the center when projected onto the upper sheet 11a. The center of the connecting portion 16 is the same as the center O of the connecting portion 15. For example, the center when the connecting portions 15 and 16 are rectangular is a point that intersects when the opposite vertices are connected, the center when circular is the midpoint of the diameter, and in the case of a line, the upper sheet 11a. This is the midpoint of the length when projected onto.

  In the present embodiment, as shown in FIG. 2 and FIGS. 5A to 5C, the connecting portions 15 and 16 are disposed inside the left air chamber 11 and the right air chamber 12, and the left air chamber 11. And an internal air chamber capable of transferring air inside the right air chamber 12. In order to allow the air inside the left air chamber 11 and the right air chamber 12 to be exchanged, the connecting portions 15 and 16 are provided with openings 15a and 16a. That is, the air filled in the left air chamber 11 and the right air chamber 12 can be moved through the openings 15a and 16a to the connecting portions 15 and 16 that are internal air chambers. In addition, the communication part 15 should just be a shape which has the opening part 15a, may be any shape of FIG. 5 (A)-(C), and may be another shape.

  Moreover, since the connection parts 15 and 16 have flexibility, they can deform | transform by pressurization. For example, urethane, PVC, or the like can be used as a material constituting the connecting portions 15 and 16.

  As shown in FIG. 2, the direction in which the connecting portion 15 extends (the direction in which the distances R <b> 1 and R <b> 2 extend) is preferably substantially parallel to the direction in which the region Z facing the connecting portion 15 in the left air chamber 11 extends. . When the connection part 15 and the area | region Z are curves, it is preferable that the tangent of this area | region is mutually parallel. The connection portion 16 is the same as the connection portion 15. In this case, the balance when seated can be improved.

  The injection part 17 is formed in the upper sheet of the right air chamber 12. The injection part 17 serves as an inlet when the air is filled into the right air chamber 12 and serves as an outlet when the air is discharged from the inside of the right air chamber 12 to the outside. In the present embodiment, the right air chamber 12 and the left air chamber 11 communicate with each other through the communication path 13, and therefore, when air is injected from the injection portion 17, the left air chamber 11 also enters the inside of the left air chamber 11 through the communication path 13. Can be filled with air. Further, when air is discharged from the inside of the left air chamber 11 and the right air chamber 12, the air can be discharged from the injection portion 17 to the outside.

  The planar shape of the cushion 10 in the present embodiment is a wedge shape. When the user is seated, the cushion 10 is preferably shaped so that the user's buttocks and thighs do not protrude. Further, the sciatic bone is preferably located on the left air chamber 11 and the right air chamber 12, and more preferably on the connecting portions 15 and 16.

  Next, the operation of the cushion 10 in the present embodiment will be described. First, the left air chamber 11 and the right air chamber 12 are filled with air through the injection portion 17 of the cushion 10.

  In this state, when the user sits on the cushion 10 so that the thighs are located on the front side and the buttocks are located on the back side, the back side is raised more than the front side, as shown in FIG. That is, the rear side is higher than the front side. This is because, in the left air chamber 11 and the right air chamber 12, the maximum widths W11a and W12a on the front side are narrower than the maximum widths W11b and W12b on the rear side, and in the front-rear direction of the left air chamber 11 and the right air chamber 12 This is due to at least one of the connecting portions 15 and 16 being arranged so that the center O is positioned in front of the center line X passing through the center and extending in the left-right direction. For this reason, when the user sits on the cushion 10, the position of the buttocks becomes higher than the thigh. As a result, the seated user's pelvis can be maintained in an upright state. If the pelvis of the seated user can be maintained in a standing state, the seated posture can be kept good. Therefore, as described above, the burden on the waist can be reduced.

  When the user is seated, it is preferable that the upper seat 11a gradually bulges upward from the front side toward the rear side in FIG.

  Further, since the communication passage 13 communicates the air inside the left air chamber 11 and the right air chamber 12, the left air chamber 11 and the right air chamber 12 are pressurized when the posture is changed. For this reason, the air inside the left air chamber 11 and the right air chamber 12 moves from one to the other. That is, in the present embodiment, the movement of air between the left air chamber 11 and the right air chamber 12 is always in the left-right direction. Since the left air chamber 11 and the right air chamber 12 communicate with each other only through the communication path 13, the communication path 13 becomes a resistance. For this reason, by moving the pelvis, the muscles around the pelvis can be loosened and the muscles around the pelvis can be trained. Therefore, since the flexibility around the pelvis is increased, the pelvis can be made to stand and the pelvis can be kept in a standing state for a long time. As a result, it is possible to continue a correct posture for a long time. Therefore, as described above, the burden on the waist can be reduced.

  As described above, when sitting on the cushion 10 in the present embodiment, it is possible to obtain a sitting posture that can maintain the pelvis in a standing state, to improve flexibility around the pelvis, and to train muscles around the pelvis at the same time. realizable.

  As described above, the cushion 10 according to the present embodiment has the maximum width behind the middle line X passing through the center in the front-rear direction and extending in the left-right direction in the left air chamber 11 and the right air chamber 12. W11b and W12b are larger than the maximum widths W11a and W12a on the front side of the middle line X.

  Thereby, since the front maximum width W11b, W12b is narrower than the rear maximum width W11a, W12a, when the user is seated so that the thigh is located on the front side and the buttock is located on the rear side, The back side rises (swells). That is, when the user is seated, the buttock becomes higher than the thigh. Thereby, a user's pelvis can be maintained in the standing state.

  In the cushion 10 in the present embodiment, each of the left air chamber 11 and the right air chamber 12 connects the upper seat 11a, the lower seat 11b, the upper seat 11a, and the lower seat 11b, thereby providing flexibility. Connecting portions 15 and 16. Each of the connecting portions 15 and 16 is disposed such that the center O is positioned in front of the middle line X that passes through the center of the left air chamber 11 and the right air chamber 12 in the front-rear direction and extends in the left-right direction. .

  As a result, the connecting portions 15 and 16 that are disposed so that the center O is positioned in front of the middle line X that passes through the centers of the left air chamber 11 and the right air chamber 12 in the front-rear direction and extend in the left-right direction. I have. When the user is seated so that the thigh is located on the front side and the buttock is located on the rear side, the connecting parts 15 and 16 prevent the front side from rising (swelling). That is, the rear side is raised more than the front side, and the hips are higher than the thighs. Thereby, a user's pelvis can be maintained in the standing state.

  Preferably, in the cushion 10, the connecting portions 15, 16 are disposed inside the left air chamber 11 and the right air chamber 12, and are internal air chambers that can exchange air inside the left air chamber 11 and the right air chamber 12. It is.

  Thereby, the height of the front side of the left air chamber 11 and the right air chamber 12 can be suppressed effectively. For this reason, when the user is seated, the cushion 10 in which the rear side rises more than the front side can be realized.

  In the cushion 10, the configuration of the left air chamber 11 and the right air chamber 12 in which the maximum widths W11b, 12b on the rear side of the middle line X are larger than the maximum widths W11a, W12a on the front side of the middle line X, and the connecting portion 15 , 16 is preferable.

  Thereby, the cushion 10 in which the rear side swells more than the front side of the left air chamber 11 and the right air chamber 12 can be realized more effectively.

  In the cushion 10, preferably, each of the left air chamber 11 and the right air chamber 12 gradually decreases in width from the maximum width portion toward the front side in the front-rear direction.

  Thereby, the cushion 10 in which the rear side swells more than the front side of the left air chamber 11 and the right air chamber 12 can be realized more effectively.

  In the cushion 10, the left air chamber 11 and the right air chamber 12 are preferably symmetrical with respect to an axis Y orthogonal to the direction in which the communication passage 13 extends.

  As a result, when the user is seated, the left and right buttocks can be placed uniformly, so that the pelvis can be maintained in a stable state.

  Preferably, the cushion 10 further includes a connection portion 14 that connects the left air chamber 11 and the right air chamber 12 between the left air chamber 11 and the right air chamber 12, and the communication path 13 is provided on the connection portion 14. Provide.

  Thereby, the deformation of the left air chamber 11 and the right air chamber 12 due to the seating of the user can be absorbed on the connection portion 14.

(Embodiment 2)
FIG. 6 is a top view schematically showing a cushion according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. As shown in FIGS. 6 to 8, the cushion 20 in the present embodiment basically has the same configuration as the cushion 10 in the first embodiment, but the left air chamber 11, the right air chamber 12, and The difference is that a cover portion 21 that covers the cushion 10 including the communication path 13 is further provided.

  Specifically, the cover part 21 includes a main body part 22, an opening part 23, and a fixing part 24. The main body 22 accommodates the cushion 10 therein. The opening 23 is formed at the end of the main body 22 and is provided to accommodate or take out the cushion 10 of the first embodiment to the outside. The main body 22 preferably further includes a fastener for closing the opening 23 in order to maintain the state in which the cushion 10 is accommodated therein. As the fastener, for example, a button, a chuck, or the like can be used.

  The fixing part 24 is connected to the main body part 22. The fixing part 24 is a member for fixing to a chair or the like, and for example, a string or the like can be used. The fixing part 24 may be integrally formed with the main body part 22.

  FIG. 9 is a top view schematically showing a modification of the cushion according to Embodiment 2 of the present invention. In FIG. 9, cross-sectional views taken along lines VII-VII and VIII-VIII correspond to FIGS. 7 and 8, respectively.

  As shown in FIG. 9, the cushion 30 in the modification has basically the same configuration as the cushion 20 shown in FIG. 7, but the cover portion 21 holds the main body portion 22 and the fixing portion 24. It differs in that it further has a portion 25.

  Specifically, a holding unit 25 is connected to the main body unit 22. The fixing portion 24 is passed through an opening formed by the holding portion 25 and the main body portion 22. That is, the main body portion 22 and the fixed portion 24 are connected via the holding portion 25.

  As described above, the cushions 20 and 30 in the present embodiment and its modifications further include the cover portion 21 that covers the cushion 10 including the left air chamber 11, the right air chamber 12, and the communication passage 13. Thereby, while being able to make the external appearance of a cushion favorable, the convenience can be improved more.

  Although the embodiment of the present invention has been described above, the above-described embodiment can be variously modified. The scope of the present invention is not limited to the above-described embodiment. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a top view which shows schematically the cushion in Embodiment 1 of this invention. It is a top view which expands and shows schematically the left air chamber which comprises the cushion in Embodiment 1 of this invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. It is a perspective view which shows roughly the connection part which comprises the cushion in Embodiment 1 of this invention. It is a top view which shows schematically the cushion in Embodiment 2 of this invention. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6. It is a top view which shows roughly the modification of the cushion in Embodiment 2 of this invention.

Explanation of symbols

  10, 20, 30 Cushion, 11 Left air chamber, 11a Upper seat, 11b Lower seat, 12 Right air chamber, 13 Communication path, 14 Connection portion, 15, 16 Connection portion, 15a, 16a, 22, 23 Opening portion, 17 injection part, 21 cover part, 22 body part, 24 fixing part, 25 holding part, O center, R1, R2 distance, W10a, W10b, W11a, W11b, W12a, W2b maximum width, X center line, Y axis, Z region.

Claims (4)

A cushion that is deformed by the pressure applied by the user sitting,
Independent left and right air chambers that can be filled with air,
A communication path that communicates the left air chamber and the right air chamber and that can move the air filled in the left air chamber and the right air chamber to each other;
In the left-air chamber and the right air chamber, through the longitudinal center of the cushion, and the maximum width of the rear side of the middle line extending in the lateral direction, than the maximum width of the front than the midline Make it bigger
Wherein each of the left air chamber and the right air chamber, gradually narrowing the width from the portion of the maximum width of the rear side of the midline toward the front side,
The left air chamber and the right air chamber, and symmetrical with respect to the axis perpendicular to the direction of extension of said communication passage,
And between the left air chamber and the right air chamber, said connect the left air chamber and said right air chamber, the said left air chamber right with separating the said right air chamber and the left air chamber By forming a step between the air chamber and providing a connection part composed of a sheet-like member, it becomes possible to maintain the user's pelvis upright when in use,
The cushion which provided the said communicating path extended in the left-right direction on the said connection part. Each of the left air chamber and the right air chamber includes an upper sheet, a lower sheet, a coupling part that couples the upper sheet and the lower sheet, and has flexibility,
Each said connection part is arrange | positioned so that a center may be located ahead of the center line which passes through the center of the front-back direction of the said left air chamber and the said right air chamber, and is extended in the left-right direction. Cushion as described in.   The said connection part is an internal air chamber which is arrange | positioned inside the said left air chamber and the said right air chamber, and is an internal air chamber which can transfer the air inside the said left air chamber and the said right air chamber. cushion. The cushion according to any one of claims 1 to 3 , further comprising a cover portion that covers the left air chamber, the right air chamber, and the communication path.

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