Bodywork cushion

Abstract

To provide a chiropractic cushion for allowing a posture of a seated person to be suitably kept in a correct posture.SOLUTION: A chiropractic cushion 10 includes: a cushion body 11 formed by a cushion material; and a board 12 arranged inside the cushion body 11. The cushion body 11 includes: a support part 13 for supporting hip parts and thigh parts of a seated person; and a swelling part 14 swelled upward from a rear part of the support part 13. The board 12 is arranged to be extended in a front and rear direction and in a right and left direction. Cushion layers 18, 19 by the cushion material are formed on both of upper and lower sides holding the board 12 between them. In the board 12, its front end part is positioned on a lower side of the thigh parts of the seated person supported by the support part 13, and a rear side part 12b including its rear end part enters the swelling part 14 by upward deformation toward a rear side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bodywork cushion. [Background technology]

[0002] Conventionally, there have been known orthopedic cushions that are placed on the seat of a chair or the like to adjust the posture of a seated person. For example, Patent Document 1 discloses such an orthopedic cushion that is entirely made of a cushioning material such as urethane foam. This orthopedic cushion is configured with a seat portion that supports the buttocks of the seated person and a back portion that supports the lower back of the seated person. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-012130 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when a seated person is doing desk work, etc., the seated person may sit with a hunched forward posture. In such a case, the seated person's pelvis may tilt backward, which may result in poor posture. Therefore, in such a case, it is conceivable to use the chiropractic cushion of Patent Document 1 to support the pelvis from behind with the back, thereby maintaining the seated person's posture in a correct position.

[0005] However, the chiropractic cushion of Patent Document 1 is entirely made of a flexible cushioning material, so even if the back tries to support the pelvis, the back may fall backward or collapse, and the pelvis may not be supported in a stable state. Therefore, it is considered difficult for the chiropractic cushion of Patent Document 1 to maintain the correct posture of the seated person.

[0006] The present invention has been made in view of the above circumstances, and has as its main object to provide a manipulative cushion that can appropriately maintain the posture of a seated person in a correct posture. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a bodywork cushion that: A body-correcting cushion that adjusts the posture of a seated person, A cushion body formed of a cushion material, The cushion body includes: a support portion that supports the buttocks and thighs of the seated person from below; a protruding portion that protrudes upward from a rear portion of the support portion and supports the buttocks of the seated occupant from behind; It has A board extending in the left-right and front-rear directions is provided inside the cushion body, Cushion layers made of the cushioning material are formed on both the upper and lower sides of the board, The board has its front end positioned below the thighs of the seated occupant supported by the support portion, and its rear portion including the rear end is displaced upward as it moves rearward, thereby fitting into the raised portion. [Effects of the Invention]

[0008] According to the present invention, when a person sitting on a chiropractic cushion leans forward, the person's center of gravity is positioned forward, and the weight of the person acts from the person's thighs to the front end of the board through the cushion layer. This causes the front portion of the board to tilt downward, and the rear portion of the board rises forward within the raised portion of the cushion body. This allows the rear portion of the board to support the person's buttocks via the raised portion, thereby uprighting the person's pelvis. This allows the person to maintain proper posture. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2(a) is a plan view showing the manipulative cushion, (b) is a front view, and (c) is a side view. [Figure 2] 1(a) is a plan view showing the cushion body, (b) is a front view, and (c) is a side view. [Figure 3] (a) is a plan view showing the board, (b) is a front view, and (c) is a side view. [Figure 4] FIG. 2 is an exploded perspective view showing the manipulative cushion in an exploded state. [Figure 5] FIG. 10 is a side view illustrating the function of the manipulative cushion. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows (a) a plan view of a manipulative cushion 10, (b) a front view, and (c) a side view. Fig. 2 shows (a) a plan view of a cushion main body 11, (b) a front view, and (c) a side view. Fig. 3 shows (a) a plan view of a board 12, (b) a front view, and (c) a side view. Fig. 4 is an exploded perspective view showing the manipulative cushion 10 in an exploded state.

[0011] The chiropractic cushion 10 is used in a state in which it is placed on the seat of a chair, the floor, or the like, and a person sits on the placed chiropractic cushion 10 (see FIG. 5). As shown in FIGS. 1(a) to 1(c), the chiropractic cushion 10 includes a cushion body 11 and a board 12 provided inside the cushion body 11. The cushion body 11 is formed of a cushion material, for example, urethane foam. The cushion body 11 has a bilaterally symmetrical shape. Although not shown in the drawings, the cushion body 11 is covered on the outside with a cushion cover.

[0012] As shown in Figures 2(a) to (c), the cushion main body 11 has a support portion 13 that has a predetermined thickness and extends in a substantially horizontal direction, and a protruding portion 14 that protrudes upward from the rear of the support portion 13. The support portion 13 supports the buttocks and thighs of a seated person from below, and is substantially rectangular in shape in a plan view. The upper surface of the support portion 13 is the seating surface on which the seated person sits. The upper surface of the support portion 13 extends in a substantially horizontal direction, and more specifically, the center portion in the left-right direction at the front end side is slightly raised upward. The lower surface of the support portion 13 is the resting surface that is placed on the seat of a chair, the floor, or the like. The lower surface of the support portion 13 is a flat surface that extends in a horizontal direction. More specifically, the entire lower surface of the support portion 13, and therefore the entire lower surface of the cushion main body 11, is flat.

[0013] The raised portion 14 is a portion that supports the buttocks of a seated person from behind, and protrudes from the entire left-right direction of the support portion 13. The raised portion 14 protrudes from the support portion 13 to a height of approximately 80 to 120 mm. The front surface of the raised portion 14 is an inclined surface that slopes backward, and is continuous with the upper surface of the support portion 13 via a smooth arc surface. The front surface of the raised portion 14 also has a gently curved shape that concaves backward.

[0014] The raised portion 14 has a recessed portion 16 that is recessed downward in the center in the left-right direction. The recessed portion 16 is open on both sides in the front-to-rear direction, thereby ensuring ventilation when a seated person is seated. In addition, the raised portion 14 has a pair of mountain-shaped ridges 17 on both sides of the recessed portion 16.

[0015] The board 12 is made of a hard resin, for example, ABS resin. As shown in FIGS. 1(a) to 1(c), the board 12 is formed with a predetermined (constant) thickness as a whole, and is provided so as to extend in the front-rear and left-right directions inside the cushion main body 11. The board 12 is arranged so as to cover most of the cushion main body 11 in a plan view. The board 12 has a symmetrical shape, and is arranged so that its center in the left-right direction is located at the center of the cushion main body 11 in the left-right direction. The board 12 is also elastically deformable.

[0016] Cushion layers 18 and 19 made of cushioning material are formed on both the upper and lower sides of the cushion body 11, sandwiching the board 12. Of the cushion layers 18 and 19, cushion layer 18 is a lower cushion layer 18 formed on the lower side of the board 12, and cushion layer 19 is an upper cushion layer 19 formed on the upper side of the board 12. Each of the cushion layers 18 and 19 is formed over the entire area of ​​the board 12 in a plan view.

[0017] The lower surface of the lower cushion layer 18 is flat and constitutes part of the lower surface (rear surface) of the cushion main body 11. The upper surface of the lower cushion layer 18 is curved to follow the curved shape of the board 12. As a result, the entire upper surface of the lower cushion layer 18 is superimposed on the lower surface of the board 12. The upper surface of the upper cushion layer 19 constitutes part of the upper surface (front surface) of the cushion main body 11. The lower surface of the upper cushion layer 19 is curved to follow the curved shape of the board 12. As a result, the entire lower surface of the upper cushion layer 19 is superimposed on the upper surface of the board 12.

[0018] In this embodiment, the cushion main body 11 has an upper cushion portion 11a and a lower cushion portion 11b, which are divided into upper and lower portions as shown in FIG. 4. The upper cushion portion 11a and the lower cushion portion 11b are integrated by gluing or heat welding with the board 12 interposed between them. In this manner, in this embodiment, the cushion main body 11 with the board 12 built in, i.e., the manipulative cushion 10, is manufactured. More specifically, a storage recess 21 for storing the board 12 is formed on the upper surface of the lower cushion portion 11b, and the upper cushion portion 11a and the lower cushion portion 11b are integrated with the board 12 stored in the storage recess 21. The storage recess 21 may be formed on the underside of the upper cushion portion 11a instead of the lower cushion portion 11b.

[0019] Incidentally, the manufacturing method of the chiropractic cushion 10 does not necessarily have to be the manufacturing method described above. For example, a manufacturing method may be adopted in which the board 12 is inserted into a mold in advance and then a resin material (cushion material) is injected into the mold, thereby integrally molding the board 12 and the cushion body 11.

[0020] The board 12 has a front portion 12a including its front end and a rear portion 12b including its rear end. The front portion 12a of the board 12 is provided inside the support portion 13 of the cushion main body 11 and extends approximately horizontally in the front-to-rear direction. The front end of the front portion 12a is located below the thighs of the seated occupant supported by the support portion 13 (see also FIG. 5). The rear end of the front portion 12a is located at approximately the same position as the front end of the protruding portion 14 in the front-to-rear direction.

[0021] The rear portion 12b of the board 12 is curved so that it displaces upward as it moves rearward. Specifically, the rear portion 12b has a curved shape that convexly extends diagonally downward toward the rear. The rear portion 12b extends from the support portion 13 of the cushion body 11 into the raised portion 14, and its upper end is located above the center of the raised portion 14 in the height direction.

[0022] The board 12 has a curved shape that convex downward so that both left and right ends are located higher than the center in the left and right direction. More specifically, the board 12 has the above-mentioned curved shape over its entire front-to-rear direction. The board 12 also has a length in the left and right direction (i.e., width) that increases toward the front, and more specifically, the length in the left and right direction continuously increases toward the front.

[0023] The rear portion 12b of the board 12 has a cutout 23 formed at its rear end (i.e., upper end) that is open. The cutout 23 is formed in the center of the board 12 in the left-right direction, at a position that faces the tailbone of a seated person. The cutout 23 has a generally elliptical shape that extends in the front-to-rear direction (i.e., up-to-down direction). Therefore, the width (length in the left-to-right direction) of the cutout 23 is smaller at the rear end side of the cutout 23, i.e., the open side of the cutout 23, than at the center side of the cutout 23 in the front-to-rear direction.

[0024] The left and right portions of rear portion 12b sandwiching cutout portion 23 are recessed into the respective peaks 17 of protrusion 14. The upper edges of the left and right portions of rear portion 12b are inclined downward in the left-right direction toward cutout portion 23.

[0025] Next, the operation of the above-mentioned manipulative cushion 10 will be explained with reference to Fig. 5. Fig. 5 is a side view for explaining the operation of the manipulative cushion 10. It is assumed here that the manipulative cushion 10 is used when a person sits in a chair and does desk work.

[0026] As shown in FIGS. 5(a) and 5(b), when using the chiropractic cushion 10, the chiropractic cushion 10 is placed on the seat of a chair S. Then, in this placed state, a seated person H sits on the chiropractic cushion 10. In this case, the seated person H sits with his / her buttocks and thighs placed on the support parts 13. In addition, at this time, the seated person H sits with his / her buttocks touching the protruding parts 14 from the front.

[0027] When the seated person H performs desk work, it is expected that the seated person H will sit in a slouched position. In this case, the seated person H's pelvis may tilt backward, potentially resulting in poor posture. With the above-described chiropractic cushion 10, when the seated person H leans forward and their center of gravity is positioned forward, as shown in FIG. 5( a), the weight of the seated person H acts from their thighs to the front end of the board 12 via the upper cushion layer 19. As a result, the front portion 12a of the board 12 tilts downward within the support portion 13, and the rear portion 12b of the board 12 rises forward (stands up) within the raised portion 14. This allows the rear portion 12b of the board 12 to support the seated person H's buttocks via the raised portion 14, thereby enabling the seated person H's pelvis to stand upright. This allows the seated person H to maintain a proper posture.

[0028] Furthermore, it is also conceivable that the seated person H's pelvis may tilt backward as a result of the seated person H being in a backward tilted state. In this case, there is a risk of strain being placed on the lower back of the seated person H. In this regard, with the above-described chiropractic cushion 10, as shown in FIG. 5(b), the rearward load from the buttocks of the seated person H can be received by the rear portion 12b of the board 12 via the raised portion 14. Therefore, it is possible to suppress strain being placed on the lower back of the seated person H.

[0029] According to the configuration of this embodiment described above in detail, the following excellent effects can be obtained.

[0030] The rear portion 12b of the board 12 is displaced upward as it moves rearward, while the front portion 12a of the board 12 extends approximately horizontally in the front-to-rear direction. In this case, the above-mentioned effect of the rear portion 12b of the board 12 rising forward as the front portion 12a of the board 12 tilts downward can be preferably exerted.

[0031] The rear portion 12b of the board 12 has a cutout 23 formed at the rear end, in the center in the left-right direction and at a position facing the tailbone of the seated person H. In this case, when the rear portion 12b of the board 12 supports the buttocks (pelvis) of the seated person H, the tailbone of the seated person H can be prevented from being compressed by the board 12. Furthermore, by forming the cutout 23 in the rear portion 12b of the board 12, the support force acting on the buttocks from the rear portion 12b can be prevented from becoming excessive. This makes it possible to maintain a comfortable posture for the seated person H.

[0032] In addition, since the rear portion 12b of the board 12 is separated into left and right sides sandwiching the notch 23, when the seated person H turns their body left or right, the separated both sides will shift forward or backward accordingly. Therefore, the buttocks of the seated person H are supported from behind by the board 12, making it easy for the seated person H to turn their body left or right.

[0033] The raised portion 14 has a recess 16 that is recessed downward in the center in the left-right direction, making it easier for the seated person H to turn their body to the left or right.

[0034] The board 12 has a lateral length (width) that increases toward the front, so even if the occupant H sits with their legs apart or leans to the side, when the occupant H leans forward, the weight from their thighs can be easily applied to the board 12. Therefore, regardless of how the occupant H sits, the rear portion 12b of the board 12 can be raised, allowing the occupant H's pelvis to stand upright.

[0035] The front portion 12a of the board 12 is curved downward so that both left and right ends are positioned higher than the center. In this case, the left and right ends of the board 12 can support the thighs of the seated person H from both sides. This allows the seated person H to adjust their posture so that they are facing forward.

[0036] Furthermore, the surface of the lower cushion layer 18 provided on the underside of the board 12 that faces the front portion 12a of the board 12 is curved to follow the curved shape of the front portion 12a, so that the curved front portion 12a can be stably supported from below.

[0037] The width of the cutout 23 is smaller at the open side (upper end side) of the cutout 23 than at the center side in the vertical direction of the cutout 23. In this case, even if the cutout 23 is provided in the rear part 12b of the board 12, it is easy to ensure the left-right length at the upper edge of the rear part 12b, and the pelvis of the seated person H can be properly erected.

[0038] The present invention is not limited to the above-described embodiment, and may be implemented, for example, as follows.

[0039] The shape of the cushion body 11 is not necessarily limited to that of the above embodiment. For example, the raised portion 14 may not be provided with the recessed portion 16. Also, instead of the raised portion 14 having the recessed portion 16, a pair of raised portions may be provided spaced apart on the left and right.

[0040] The cushion material forming the cushion body 11 does not necessarily have to be urethane foam, and other cushion materials such as polyethylene foam may be used.

[0041] The shape of the board 12 is not necessarily limited to that of the above embodiment. For example, in the above embodiment, the board 12 has a curved shape that is curved in the left-right direction so that both ends in the left-right direction are positioned higher than the center in the left-right direction. However, this may be changed so that the board 12 is not curved in the left-right direction, that is, the board 12 may have a shape that is positioned at the same height across the entire left-right area.

[0042] In the above embodiment, the notch 23 is formed in the rear portion 12b of the board 12, but in order to reduce pressure on the tailbone, a hole may be formed instead of the notch 23.

[0043] The board 12 does not necessarily have to be made of ABS resin, but may be made of other hard resin materials such as PP resin. Also, the board 12 may be made of a metal material instead of a hard resin material. [Explanation of symbols]

[0044] 10...chiropractic cushion, 11...cushion body, 12...board, 13...support portion, 14...raised portion, 16...recess, 18, 19...cushion layer, 23...cutout portion.

Claims

1. A body-correcting cushion that adjusts the posture of a seated person, A cushion body formed of a cushion material, The cushion body includes: a support portion that supports the buttocks and thighs of the seated person from below; a protruding portion that protrudes upward from a rear portion of the support portion and supports the buttocks of the seated occupant from behind; It has A board extending in the left-right and front-rear directions is provided inside the cushion body, Cushion layers made of the cushioning material are formed on both the upper and lower sides of the board, a front end of the board is positioned below the thighs of the seated occupant supported by the support portion, and a rear portion including a rear end thereof is displaced upward as it moves rearward, thereby fitting into the raised portion; When a load acts on the front end of the board via the upper cushion layer, a front portion of the board that is forward of the rear portion tilts downward inside the support portion, The board is formed so that its length in the left-right direction increases toward the front of the board.

2. The orthopedic cushion according to claim 1 , wherein the front portion of the board extends substantially horizontally in the front-to-rear direction.

3. 3. The bodywork cushion according to claim 1, wherein the rear portion has a cutout portion that is open at the rear end in the center in the left-right direction and at a position facing the tailbone of the seated person.

4. 4. The orthopedic cushion according to claim 3, wherein the raised portion has a recessed portion recessed downward in a central portion in the left-right direction, or a pair of raised portions are provided spaced apart in the left-right direction.

5. The front portion of the board has a curved shape that is convex downward so that both ends in the left-right direction are located higher than the center in the left-right direction, The bodywork cushion according to any one of claims 1 to 4, wherein the opposing surface of the cushion layer below the board that faces the front portion is a curved surface that follows the curved shape of the front portion.

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