JP6789366B2 - Posture holder - Google Patents

Description

The present invention relates to a posture holder.

Patent Document 1 discloses a conventional posture holder. This posture holder includes a buttock support portion that supports the buttock portion of the seated person, and a lumbar portion support portion that continuously supports the lumbar region of the seated person at one end of the buttock support portion. This posture holder is made of a foamed resin such as urethane foam. Since this posture holder has elasticity, when it is placed on a chair, it can be deformed according to the angle formed by the seat surface and the backrest portion of the chair and placed accurately. In addition, this posture holder has a surface shape in which the buttock support portion supports the ischial bone of the seated person and the like is recessed. The fact that the buttocks support portion supports the ischium or the like of the seated person means that the buttocks support portion abuts on the buttocks of the seated person and supports the ischial bones or the like via muscles or fat (the same shall apply hereinafter). In addition, this posture holder has a surface shape in which the lumbar support portion supports the ilium of the seated person and the like is recessed. In addition, when the lumbar support portion supports the ilium of the seated person, it means that the lumbar support portion abuts on the lumbar portion of the seated person and supports the ilium or the like via muscles, fat, etc. (the same applies hereinafter). .. This posture-retaining device can support the ischium, the ilium, and the like so that the seated person can sit in the correct posture.

Japanese Unexamined Patent Publication No. 2014-12130

However, the posture holder of Patent Document 1 needs to hold a surface shape suitable for the seated person to sit in the correct posture when the seated person is seated. That is, the buttock support portion and the lumbar portion support portion of this posture holder have a hardness capable of maintaining the surface shape while having a certain elasticity. Therefore, in this posture holder, when the seated person is seated, the buttocks support portion and the waist support portion may not fit the seated person's body shape. If the buttock support and lumbar support do not fit the occupant's body shape, the buttock and lumbar region of the occupant will partially abut, and the weight of the occupant will concentrate on the buttock, especially the buttock, for a long time. You may not be able to sit down.

The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object to be solved to provide a posture holder that allows a seated person to easily sit in a correct posture.

The posture holder of the present invention
A posture holder having a waist support that supports the seated person's waist.
A base layer provided with a lumbar side base portion constituting the back surface side of the lumbar support portion, and
A cushion layer formed of a low-resilience material, which covers the surface of the base layer and constitutes the surface side of the lumbar support portion, and
Equipped with a,
The lumbar-side base portion has a lumbar-side outer shell portion made of hard resin, and has a surface formed by a curved surface whose left and right end sides are located on the front side with respect to the left and right central portions. To do.

This posture holder comprises a base layer. Therefore, in this posture holder, the base layer regulates the deformation of the cushion layer so that the cushion layer is not deformed too much when the seated person sits on the posture holder. Further, since the cushion layer of this posture holder is made of a low-resilience material, the cushion layer is deformed according to the body shape of the seated person when the seated person is seated. Therefore, this posture holder allows the seated person to sit in the correct posture.

The front side of the posture holder is the side on which the buttocks and hips come into contact when the seated person is seated, and the back side is the opposite side (hereinafter, the same applies). Further, the left, right, top and bottom are the left, right, top and bottom when the posture holder is placed on a chair or the like so that the seated person can sit and the waist support portion is viewed from the front (hereinafter, the same applies). In addition, in the front and back, when the posture holder is placed on a chair or the like so that the seated person can sit and the buttock support is viewed from above, the end side of the buttock support where the lumbar support is not continuous is in front. The lumbar support side is later (hereinafter, the same applies).

Further, in this posture holder, the cushion layer is formed of a low-resilience material. Therefore, in this posture holder, the surface of the cushion layer fits snugly to the lumbar region of the seated person, so that the seated person can easily maintain the correct posture. Further, in this posture holder, when the seated person is seated, the entire body of the seated person located on the posture holder side of the waist is in contact with the surface of the cushion layer, and the body pressure of the seated person is dispersed. Therefore, in this posture holder, the weight of the seated person is not concentrated on the buttocks, and the seated person can sit for a long time. In addition, the posture-retaining device protects the part where the load of the occupant is likely to be applied by the shock absorption of the low-resilience material, and can make the sitting comfort so that the waist is gently wrapped.

Therefore, the posture holder of the present invention can be easily seated in the correct posture.

It is a perspective view which shows the posture holder of Example 1. FIG. It is a left-right center sectional view which shows the posture holder of Example 1. FIG. It is an exploded perspective view which shows the posture holder of Example 1. FIG. It is a top view which shows the outer shell member of Example 1. FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. FIG. 4 is a cross-sectional view taken along the line CC of FIG. FIG. 4 is a cross-sectional view taken along the line DD of FIG. It is a perspective view which shows the intermediate layer of Example 1. FIG. It is a top view which shows the cushion layer of Example 1. FIG. FIG. 10 is a cross-sectional view taken along the line AA of FIG. FIG. 10 is a cross-sectional view taken along the line BB of FIG. FIG. 10 is a cross-sectional view taken along the line CC of FIG. FIG. 10 is a cross-sectional view taken along the line DD of FIG. The procedure for assembling the posture holder according to the first embodiment is shown, where (I) is the first step of kicking the first frame member to the outer shell member, (II) the second step of attaching the intermediate layer, and (III) is the action layer. The third step of attaching, (IV) is the fourth step of attaching the exterior sheet, and (V) is the fifth step of attaching the second frame member. FIG. 5 is a cross-sectional view showing a state in which a seated person is seated on the posture holder of the first embodiment. It is a perspective view which shows the posture holder of Example 2. FIG. It is a left-right center sectional view which shows the posture holder of Example 2. FIG. It is a perspective view which shows the intermediate layer of Example 2. FIG. It is a top view which shows the cushion layer of Example 2. FIG. 20 is a cross-sectional view taken along the line AA of FIG. FIG. 20 is a cross-sectional view taken along the line BB of FIG. FIG. 2 is a cross-sectional view taken along the line CC of FIG. 20 is a cross-sectional view taken along the line DD of FIG. FIG. 5 is a cross-sectional view showing a state in which a seated person is seated on the posture holder of the second embodiment.

A preferred embodiment of the present invention will be described .
The cushion layer in the posture holder of the present invention may have thick portions on both the left and right sides of the center portion on the left and right sides. In this case, in this posture holder, the cushion layer is deformed according to the body shape of the seated person when the seated person is seated, and the surface of the lumbar support part properly supports the lumbar part (iliac bone, lumbar spine, etc.) It can be transformed into the uneven shape of. Even if there is a difference in height between the seated persons, the positions of the bones such as the ilium and the lumbar spine do not change significantly, so that the lumbar support portion can properly support the lumbar region. Therefore, this posture holder allows the seated person to sit in the correct posture.

Next, Examples 1 and 2 embodying the posture holder of the present invention will be described with reference to the drawings.

<Example 1>
As shown in FIGS. 1 and 2, the posture holder of the first embodiment includes a buttock support portion 1 and a lumbar support portion 2 continuous with the rear end portion of the buttock support portion 1. The buttocks support portion 1 and the lumbar portion support portion 2 are integrally formed. The seater H sits on the posture holder while it is placed on the chair C or the like (see FIG. 16).

The buttock support portion 1 is thick and has a substantially quadrangular shape when viewed from above, and the front end edge 1A is recessed rearward from both left and right ends toward the center. The buttock support portion 1 has an overall surface shape in which both left and right end portions bulge upward from the left and right center portions. Further, in the buttock support portion 1, the left and right central portions of the front end portion are slightly bulged upward with respect to the periphery thereof.

The lumbar support portion 2 is thicker than the buttock support portion 1, has a substantially quadrangular shape when viewed from the front, and the upper end edge 2A is recessed downward from both left and right ends toward the center. The surface shape of the lumbar support portion 2 is such that the left and right end portions bulge forward from the left and right center portions as a whole. Further, in this posture holder, the left-right width is the narrowest at the boundary between the buttock support portion 1 and the lumbar support portion 2, and the left-right width is constricted from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2. Further, the posture holder has a central recess 3 whose surface shape is recessed from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2. The seated person H sits so that the ischium fits into the central recess 3. In the posture holder, the buttocks of the seated person H are supported by the buttocks support portion 1, and the lumbar portion of the seated person H is supported by the lumbar region support portion 2 (see FIG. 16).

As shown in FIGS. 2 and 3, this posture holder has an outer shell member 10, a first frame member 20, an intermediate layer 30, a cushion layer 40, an exterior sheet 50, and a second frame member 60. .. This posture holder has a four-layer structure consisting of an outer shell member 10, an intermediate layer 30, a cushion layer 40, and an exterior sheet 50. In this posture holder, the outer shell member 10, the first frame member 20, and the intermediate layer 30 form the base layer 100. The base layer 100 includes a buttock-side base portion 101 and a lumbar-side base portion 102 that is continuous with the rear end portion of the buttock-side base portion 101. The buttock side base portion 101 constitutes the back surface side of the buttock support portion 1, and the lumbar side base portion 102 constitutes the back surface side of the lumbar region support portion 2.

As shown in FIGS. 3 to 8, the outer shell member 10 is a thin plate made of hard resin, and is formed into a specific shape as described later. The outer shell member 10 is continuous with the buttock side outer shell portion 11 forming the lower surface of the buttock side base portion 101 and the rear end portion of the buttock side outer shell portion 11, and is the lumbar side forming the rear surface of the lumbar side base portion 102. It has an outer shell portion 12. As shown in FIG. 4, the buttock-side outer shell portion 11 has a front end edge 11A recessed rearward from both left and right ends toward the center. The front end edge 11A of the buttock-side outer shell portion 11 has a curved shape in which the central portion bulges rearward, and the curved shape bulges forward from the central portion to the left and right end portions. Further, in the lumbar side outer shell portion 12, the upper end edge 12A is recessed downward from the left and right end portions toward the center portion. The upper end edge 12A of the lumbar side outer shell portion 12 has a curved shape in which the central portion bulges downward, and the curved shape bulges upward from both ends of the central portion to the left and right end portions. Further, the outer shell member 10 has a constricted left and right width toward the rear portion of the buttock side outer shell portion 11 and the lower portion of the lumbar side outer shell portion 12. The left and right end edges 10L and 10R of the outer shell member 10 have a curved shape in which the rear end portion of the buttocks side outer shell portion 11 and the lower end portion of the lumbar side outer shell portion 12 are continuous and bulge inward. From both ends 10F and 10B of the bulging and curved portion, the front end side of the buttock side outer shell portion 11 and the upper end side of the lumbar side outer shell portion 12 have a curved shape bulging outward. The outer shell member 10 is formed so that the left and right width of the boundary portion between the buttocks side outer shell portion 11 and the lumbar side outer shell portion 12 is the narrowest.

As shown in FIG. 5, the outer shell member 10 has a curved surface in which the rear end portion of the buttock side outer shell portion 11 and the lower end portion of the lumbar side outer shell portion 12 bulge outward (in the obliquely lower left direction in FIG. 5). Is continuous. The surface 11S extending in the front-rear and left-right directions of the outer shell portion 11 on the buttock side and the surface 12S extending in the up-down and left-right directions of the outer shell portion 12 on the waist side are approximately 90 in the left-right central cross-sectional shape and the cross-sectional shape parallel thereto. It extends in the direction of the angle of degrees.

As shown in FIGS. 5 and 6, the left and right central portions 11F on the front end side of the buttock side outer shell portion 11 bulge upward. That is, the buttock side outer shell portion 11 is formed so that a pair of curved surfaces 11B and 11B bulging downward on both sides of the left and right central portions 11F extend in the front-rear direction at the front end portion. Further, as shown in FIGS. 5 and 7, the buttock-side outer shell portion 11 extends upward while being curved toward both the left and right ends. That is, the buttock-side outer shell portion 11 has a surface formed by a curved surface 11C whose left and right end portions are curved so as to be located above the left and right center portions. As shown in FIGS. 5 and 8, the lumbar-side outer shell portion 12 extends forward while being curved toward both the left and right ends. That is, the lumbar side outer shell portion 12 has a surface formed by a curved surface 12C whose left and right end portions are curved so as to be located on the front side with respect to the left and right center portions.

As shown in FIG. 3, the first frame member 20 has a shape along the outer peripheral edge of the outer shell member 10, and has a band shape having a constant width dimension substantially the same as the thickness of the intermediate layer 30 described later. When the first frame member 20 is attached to the outer shell member 10, it forms an outer peripheral wall surface having a constant height from the outer peripheral edge of the outer shell member 10.

As shown in FIGS. 3 and 9, the intermediate layer 30 is formed of a high-resilience urethane foam having a certain thickness. This high-resilience urethane foam is a material having a higher resilience than the cushion layer 40 described later and a lower resilience than the outer shell member 10. The outer peripheral shape of the intermediate layer 30 is substantially the same as the outer peripheral shape of the outer shell member 10. The back surface shape of the intermediate layer 30 is substantially the same as the front surface shape of the outer shell member 10. Therefore, when the intermediate layer 30 is attached to the outer shell member 10 to which the first frame member 20 is attached, the back surface and the outer peripheral surface are closely aligned with the front surface of the outer shell member 10 and the inner surface of the first frame member 20 without any gap. Can be pasted.

In the intermediate layer 30, the first convex member 33 forming the central convex portion is attached to the central portion of the front end of the buttock side intermediate layer 31 constituting the buttock side base portion 101. That is, the first convex member 33 projects upward from the surface of the central portion of the front end of the buttock side base portion 101. The first convex member 33 is formed of the same high-resilience urethane foam as the intermediate layer 30. The first convex member 33 has a rectangular parallelepiped shape that is long in the front-rear direction. The dimension of the first convex member 33 in the front-rear direction is about 1/5 of the length in the front-rear direction of the buttock-side intermediate layer 31. Further, in the intermediate layer 30, a pair of second convex members 34, 34 forming left and right convex portions are attached to both left and right sides of the buttocks side intermediate layer 31. That is, the second convex members 34, 34 project upward from the left and right side surfaces of the buttock side base portion 101 and extend in the front-rear direction. The second convex members 34, 34 are formed of the same high-resilience urethane foam as the intermediate layer 30. The second convex members 34, 34 have a prismatic shape extending from the vicinity of the front end portion to the vicinity of the rear end portion of the buttocks side intermediate layer 31. The second convex members 34, 34 are attached so as to spread in the left-right direction from the rear to the front of the buttock-side intermediate layer 31.

As shown in FIGS. 3 and 10 to 14, the cushion layer 40 is made of low-resilience urethane foam, which is a low-resilience material having partially different thicknesses, as will be described later. The outer peripheral shape of the cushion layer 40 is substantially the same as the outer peripheral shape of the base layer 100 (outer shell member 10, intermediate layer 30). The back surface shape of the cushion layer 40 is the same as the front surface shape of the base layer 100 (intermediate layer 30). Therefore, when the cushion layer 40 is attached to the base layer 100, the back surface of the cushion layer 40 can be firmly attached to the front surface of the base layer 100 without any gap.

As shown in FIGS. 11 and 12, the cushion layer 40 has thick portions on both the left and right sides of the center of the left and right sides. In the cushion layer 40, the rear end portion of the buttock side cushion layer 41 forming the surface side of the buttock support portion 1 and the lower end portion of the lumbar side cushion layer 42 forming the surface side of the lumbar support portion 2 are continuously integrated. Is formed in. Further, as shown in FIGS. 11 to 14, the cushion layer 40 is generally thicker in the lumbar side cushion layer 42 than in the buttocks side cushion layer 41. When the seated person H is seated, the weight of the seated person H is not applied to the lumbar side cushion layer 42 more than the buttocks side cushion layer 41. Therefore, by increasing the thickness of the lumbar cushion layer 42, the lumbar cushion layer 42 can be greatly deformed even if the weight is small, and the seating comfort can be made so as to gently wrap the lumbar portion of the seater H. ..

Further, as shown in FIGS. 13 and 14, the surface of the buttock side cushion layer 41 is formed by a curved surface curved so that the left and right end portions are located above the left and right center portions. Further, the surface of the lumbar cushion layer 42 is formed by a curved surface curved so that both left and right ends are located on the front side of the left and right center portions. That is, the left and right central portions of the cushion layer 40 are recessed from the left and right end portions.

As shown in FIG. 11, in the buttocks side cushion layer 41, the front end portions 41A of the left and right central portions are slightly inclined upward toward the front direction. Further, as shown in FIG. 12, in the buttock side cushion layer 41, the front end portions 41B on both the left and right sides of the left and right central portions are slightly inclined downward toward the front while gradually reducing the thickness toward the front. ing. As shown in FIGS. 11 and 12, the lumbar cushion layer 42 extends in the left-right direction to form a thick portion in the central portion 42A in the vertical direction. The back surface of the lumbar side cushion layer 42 is a substantially flat surface, and the central portion 42A whose front surface is in the vertical direction bulges forward. As shown in FIGS. 3, 11, and 12, the cushion layer 40 forms recesses 40A formed in the left and right central portions of the surface from the rear portion of the buttock side cushion layer 41 to the lower portion of the lumbar side cushion layer 42. There is. The recess 40A forms the central recess 3 of the posture holder.

As shown in FIGS. 2 and 3, the exterior sheet 50 is a sheet made of soft resin, and is formed into the same uneven shape as the surface of the cushion layer 40. Therefore, when the exterior sheet 50 is attached to the front surface of the cushion layer 40, the back surface can be closely attached to the front surface of the cushion layer 40 without any gap. When the seater H is seated, the exterior sheet 50 is deformed along with the deformation of the cushion layer 40. The second frame member 60 has a shape along the outer peripheral edge of the outer shell member 10, and has a band shape having a certain width. The second frame member 60 is attached so as to hide the outer peripheral edge of the exterior sheet 50.

The posture holder is assembled as shown in FIG.
First, as shown in FIG. 15 (I), the first frame member 20 is attached to the outer peripheral edge of the outer shell member 10 to assemble the first semi-finished product. Next, as shown in FIG. 15 (II), the back surface of the intermediate layer 30 is adhered to the front surface of the outer shell member 10 of the first semi-finished product to assemble the second semi-finished product. Next, as shown in FIG. 15 (III), the back surface of the cushion layer 40 is adhered to the front surface of the intermediate layer 30 of the second semi-finished product to assemble the third semi-finished product. Next, as shown in FIG. 15 (IV), the back surface of the exterior sheet 50 is adhered to the front surface of the cushion layer 40 of the third semi-finished product to assemble the fourth semi-finished product. Finally, as shown in FIG. 15 (V), the second frame member 60 is attached so as to hide the outer peripheral edge of the exterior sheet 50 of the fourth semi-finished product, and the posture holder is completed.

In this posture holder, as shown in FIGS. 2, 3, 15 and 16, the base layer 100 is formed by the outer shell member 10, the first frame member 20, and the intermediate layer 30. The base layer 100 includes a buttock side base portion 101 and a lumbar side base portion 102. The buttock side base portion 101 has a surface formed by a curved surface whose left and right ends are curved so as to be located above the left and right center portions. Further, the lumbar side base portion 102 has a surface formed by a curved surface whose left and right ends are curved so as to be located on the front side with respect to the left and right center portions. Therefore, in this posture holder, the base layer 100 deforms the cushion layer 40 so that the cushion layer 40 formed of the low-resilience urethane foam does not deform too much when the seater H sits on the posture holder. It is regulated. Further, in this posture holder, the cushion layer 40 is formed of low-resilience urethane foam, and has thick portions on both the left and right sides of the left and right central portions.

Therefore, as shown in FIG. 16, in this posture holder, the cushion layer 40 is deformed according to the body shape of the occupant H when the occupant H is seated, and the buttock support portion 1 and the lumbar support portion 2 are formed. The surface can be transformed into a specific uneven shape that appropriately supports the buttocks (ischium, femur, etc.) and lumbar region (ilium, lumbar spine, etc.). FIG. 16 assumes that the seated person is an adult with a height of 160 cm. However, even if the seated person has a height difference, the positions of the bones such as the ischium, femur, ilium, and lumbar spine do not change significantly, so that the lumbar region is supported. The portion and the lumbar support portion can properly support the buttocks and the lumbar region.
That is, in this posture holder, when the seated person H is seated, the cushion layer 40 is deformed as described below.

When the seater H sits on the posture holder so that the ischium fits into the central recess 3 formed in the left and right central portions from the rear part of the buttock support portion 1 to the lower part of the lumbar support portion 2, the buttock portions are located in the center of the left and right sides of the posture holder. Is located, and the weight of the seated person H is heavier on the left and right central parts than on the left and right sides as a whole. Further, the cushion layer 40 has thicker portions on both the left and right sides than the central left and right portions. Therefore, in this posture holder, when the seated person H is seated, the cushion layer 40 is recessed downward in the center portion on the left and right sides more than on both the left and right sides, and the unevenness becomes large.

More specifically, when the seated person H is seated, the posture holder puts weight on the central recess 3 in which the ischial bone is fitted. In this posture holder, recesses 40A are formed in the left and right central portions of the surface of the cushion layer 40 from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2. In addition, greater pressure on the buttocks (weight of the seated person H) is applied to the central portion of the left and right than to the left and right sides. Therefore, when the seater H sits on the posture holder, the central recess 3 is recessed downward to form a large unevenness. In this way, the unevenness formed by deforming the cushion layer 40 when the seated person H is seated firmly supports the ischium without shaking to the left or right, and the buttocks of the seated person H are placed on the left and right sides of the posture holder. It can be in a sitting position located in the center.

Further, the buttock support portion 1 bears weight on the portion where both thighs abut on the front side of the central recess 3. In the buttock support portion 1, the central convex portion of the base layer 100 is formed by the first convex member 33 attached to the buttock side intermediate layer 31, and the second convex members 34, 34 attached to the buttock side intermediate layer 31. The left and right convex portions of the base layer 100 are formed by the above. Further, in the buttock support portion 1, at the front end portion of the buttock side outer shell portion 11, the left and right central portions bulge upward, and a pair of curved surfaces 11B and 11B bulging downward on both sides of the left and right central portions extend in the front-rear direction. It is formed to stretch. Therefore, when the seated person H is seated on the buttocks support portion 1, the surfaces of the portion where the first convex member 33 (central convex portion) is located and the portion where the second convex members 34 and 34 (left and right convex portions) are located are surfaced. It protrudes upward, and the portion where both thighs located between them abut is recessed to form a large unevenness. Further, the buttock support portion 1 has a forward downward inclination on the front side of the central concave portion 3, and has an overall forward downward inclination.

In this way, the left and right central portions bulge upward at the front end portion of the buttock side outer shell portion 11, and the central convex portion is formed on the base layer 100, so that the posture holder can be used when the seater H is seated. The surface of the cushion layer 40 at the portion where the first convex member 33 (central convex portion) is located protrudes upward, and the pelvis of the seater H can be prevented from slipping forward at this protruding portion. Further, both sides of the left and right central portions of the buttock side outer shell portion 11 are formed by a pair of curved surfaces 11B and 11B bulging downward, and the left and right convex portions are formed on the base layer 100, whereby the posture holder is formed. When the seated person H is seated, the surface of the cushion layer 40 at the portion where the second convex members 34, 34 (left and right convex portions) are located protrudes upward to form unevenness. The buttock support portion 1 on which the unevenness is formed can support the left and right femurs so as to extend straight forward. As a result, the posture holder can support the pelvis without shifting in the left-right direction.

Further, the waist support portion 2 bears weight on the left and right central portions with which the waist portion abuts, above the central recess 3. Since the lumbar side cushion layer 42 is thicker than the buttock side cushion layer 41 as a whole, when the seated person H sits on the lumbar support portion 2, the left and right central portions are recessed to form large irregularities even if the weight is small. In this way, the unevenness formed by deforming the cushion layer 40 when the seated person H is seated supports the ilium and the lumbar spine, and the lumbar region of the seated person H is positioned at the center of the left and right sides of the posture holder. Can be.

As described above, in this posture holder, when the seated person H is seated, the surfaces of the buttocks support portion 1 and the lumbar portion support portion 2 can be deformed into a specific uneven shape. The specific uneven shape is an uneven shape formed from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2 with the central concave portion 3 recessed downward, and is a portion where the first convex member 33 (central convex portion) is located. The surface of the portion where the second convex members 34, 34 (left and right convex portions) are located protrudes upward, and the portion where the two thighs located between them abut is recessed to form the unevenness formed on the buttock support portion 1. There is an unevenness formed in the lumbar support portion 2 with the left and right central portions recessed.

In this posture holder, when the seater H is seated, the central recess 3 is recessed downward and the ischium is fitted into the unevenness formed from the rear part of the buttock support portion 1 to the lower part of the lumbar support portion 2 to firmly hold the ischium. Easy to support. Therefore, even if the lumbar region (near the ilium) of the seated person H is pushed forward by the lumbar support portion 2, the pelvis is unlikely to shift forward. Further, since the lumbar support portion 2 pushes the lumbar region (near the ilium) of the seated person forward and the buttocks support portion 1 is inclined forward as a whole, the pelvis is easily tilted forward, and the seated person H Can be seated in the correct posture with an S-shaped spine when viewed from the side.

At this time, since the surface of the portion where the first convex member 33 (central convex portion) is located protrudes upward in this posture holder, the pelvis of the seater H slides forward at this protruding portion. It can be suppressed, and the buttock support portion 1 can appropriately support the ischium that supports the pelvis. Further, in this posture holder, the surfaces of the portion where the first convex member 33 (central convex portion) is located and the portion where the second convex members 34, 34 (left and right convex portions) are located project upward, and the position is between them. The unevenness formed in the buttocks support portion 1 by denting the portion where the two thighs abut with each other allows the left and right femurs of the seated person to be supported so as to extend straight forward, and the pelvis does not shift in the left-right direction. Can be supported. Further, in this posture holder, since the lumbar side cushion layer 42 is thicker than the buttock side cushion layer 41 as a whole, the lumbar support portion 2 is greatly deformed to make the seating comfort so as to gently wrap the lumbar portion of the seater H. be able to.
In this way, the posture holder allows the seater H to sit in the correct posture.

Further, in this posture holder, the cushion layer 40 is formed of low-resilience urethane foam. Therefore, in this posture holder, the surface of the cushion layer 40 fits snugly on the buttocks and the waist of the seated person H, so that the seated person H can easily maintain the correct posture. Further, in this posture holder, when the seater H is seated, the entire body located on the posture holder side of the buttocks and the waist of the seater H comes into contact with the surface of the cushion layer 40, and the body pressure of the seater H is dispersed. Will be done. Therefore, in this posture holder, the weight of the seated person H is not concentrated on the buttocks, and the seated person H can sit for a long time. In addition, the posture-retaining tool protects the part where the load of the seater H is likely to be applied due to the shock absorption of the low-resilience urethane foam, and can make the sitting comfort so that the buttocks and the waist are gently wrapped.

Therefore, the posture holder of the first embodiment can be easily seated in the correct posture.

<Example 2>
As shown in FIGS. 17 to 25, the posture holder of the second embodiment has a cushion in which the second convex member is not attached to the intermediate layer 230 and only the first convex member 33 is attached. The layer 240 is different from the first embodiment in that the thickness of the layer 240 is thinner than that of the first embodiment and that the pattern is formed by a plurality of curved lines 250A in which the surface of the exterior sheet 250 is recessed in a groove shape. Other configurations are the same as those in the first embodiment, and the same configurations are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIG. 19, the intermediate layer 230 is formed of a high-resilience urethane foam having a certain thickness. The outer peripheral shape of the intermediate layer 230 is substantially the same as the outer peripheral shape of the outer shell member 10. The back surface shape of the intermediate layer 230 is substantially the same as the front surface shape of the outer shell member 10. Therefore, when the intermediate layer 230 is attached to the outer shell member 10 to which the first frame member 20 is attached, the back surface and the outer peripheral surface are closely aligned with the front surface of the outer shell member 10 and the inner surface of the first frame member 20 without any gap. Can be pasted.

In the intermediate layer 230, the first convex member 33 forming the central convex portion is attached to the central portion of the front end of the buttock side intermediate layer 231 forming the buttock side base portion 101. That is, the first convex member 33 projects upward from the surface of the central portion of the front end of the buttock side base portion 101. The first convex member 33 is made of high-resilience urethane foam. The first convex member 33 has a rectangular parallelepiped shape that is long in the front-rear direction. The dimension of the first convex member 33 in the front-rear direction is about 1/5 of the length in the front-rear direction of the buttock-side intermediate layer 231.

As shown in FIGS. 20 to 24, the cushion layer 240 is generally thinner than the cushion layer 40 of the first embodiment, and the difference in unevenness on the surface side is larger than that of the cushion layer 40 of the first embodiment. The back surface shape of the cushion layer 40 is the same as that of the action layer of Example 1, and is the same as the surface shape of the base layer 100 (intermediate layer 230). Therefore, when the cushion layer 240 is attached to the base layer 100, the back surface can be closely attached to the front surface of the base layer 100 without any gap.

As shown in FIGS. 21 and 22, the cushion layer 240 has portions that are thicker on both the left and right sides than the left and right central portions. In the cushion layer 240, the rear end portion of the buttock side cushion layer 241 forming the surface side of the buttock support portion 1 and the lower end portion of the lumbar side cushion layer 242 forming the surface side of the lumbar support portion 2 are continuously integrated. Is formed in. Further, as shown in FIGS. 21 to 24, the cushion layer 240 has a thickness of the lumbar side cushion layer 242 as a whole thicker than that of the buttocks side cushion layer 241. Further, as shown in FIGS. 23 and 24, the surface of the buttock side cushion layer 241 is formed by a curved surface curved so that the left and right end portions are located above the left and right center portions. Further, the surface of the lumbar cushion layer 242 is formed by a curved surface curved so that both left and right ends are located on the front side of the left and right center portions. That is, the left and right central portions of the cushion layer 240 are recessed from the left and right end portions.

As shown in FIG. 21, the front end portion 241A of the left and right central portions of the buttock side cushion layer 241 is slightly inclined upward toward the front direction. Further, as shown in FIG. 22, in the buttock side cushion layer 41, the front end portions 241B on both the left and right sides of the left and right central portions are slightly inclined downward toward the front while gradually reducing the thickness toward the front. ing. As shown in FIGS. 21 and 22, the lumbar cushion layer 242 extends in the left-right direction to form a thick portion in the central portion 242A in the vertical direction. The back surface of the lumbar side cushion layer 42 is a substantially flat surface, and the central portion 242A in the vertical direction of the front surface bulges forward. As shown in FIGS. 21 to 24, the cushion layer 240 forms recesses 240A formed in the left and right central portions of the surface from the rear portion of the buttock side cushion layer 241 to the lower portion of the lumbar side cushion layer 242. The recess 240A forms the central recess 3 of the posture holder.

As shown in FIGS. 17 and 18, the exterior sheet 50 is a sheet made of soft resin, and is formed into the same uneven shape as the surface of the cushion layer 40. Therefore, when the exterior sheet 50 is attached to the front surface of the cushion layer 40, the back surface can be closely attached to the front surface of the cushion layer 40 without any gap. Further, the exterior sheet 50 has a pattern formed by a plurality of curved lines 250A having a groove-shaped surface. When the seater H is seated, the exterior sheet 50 is deformed along with the deformation of the cushion layer 40.

The procedure for assembling the posture holder is the same as that in the first embodiment.
In this posture holder, the base layer 100 is formed by the outer shell member 10, the first frame member 20, and the intermediate layer 230. The base layer 100 includes a buttock side base portion 101 and a lumbar side base portion 102. The buttock side base portion 101 has a surface formed by a curved surface whose left and right ends are curved so as to be located above the left and right center portions. Further, the lumbar side base portion 102 has a surface formed by a curved surface whose left and right ends are curved so as to be located on the front side with respect to the left and right center portions. Therefore, in this posture holder, the base layer 100 deforms the cushion layer 40 so that the cushion layer 40 formed of the low-resilience urethane foam does not deform too much when the seater H sits on the posture holder. It is regulated. Further, in this posture holder, the cushion layer 40 is formed of low-resilience urethane foam, and has thick portions on both the left and right sides of the left and right central portions.

Therefore, as shown in FIG. 25, in this posture holder, the cushion layer 240 is deformed according to the body shape of the occupant H when the occupant H is seated, and the buttock support portion 1 and the lumbar support portion 2 are formed. The surface can be deformed into an uneven shape that appropriately supports the buttocks (ischium, femur, etc.) and lumbar region (ilium, lumbar spine, etc.). FIG. 25 also assumes that the seated person is an adult with a height of 160 cm, but since the positions of bones such as the ischium, femur, ilium, and lumbar spine do not change significantly even if the seated person has a height difference, the lumbar region is supported. The portion and the lumbar support portion can properly support the buttocks and the lumbar region.
That is, in this posture holder, when the seated person H is seated, the cushion layer 240 is deformed as described below.

When the seater H sits on the posture holder so that the ischium fits into the central recess 3 formed in the left and right central portions from the rear part of the buttock support portion 1 to the lower part of the lumbar support portion 2, the buttock portions are located in the center of the left and right sides of the posture holder. Is located, and the weight of the seated person H is heavier on the left and right central parts than on the left and right sides as a whole. Further, the cushion layer 240 has thick portions on both the left and right sides rather than the central left and right portions. Therefore, in this posture holder, when the seated person H is seated, the cushion layer 240 is recessed downward in the center portion on the left and right sides more than on both the left and right sides, and the unevenness becomes large.

More specifically, when the seated person H is seated, the posture holder puts weight on the central recess 3 in which the ischial bone is fitted. In this posture holder, recesses 240A are formed in the left and right central portions of the surface of the cushion layer 240 from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2. In addition, greater pressure on the buttocks (weight of the seated person H) is applied to the central portion of the left and right than to the left and right sides. Therefore, when the seater H sits on the posture holder, the central recess 3 is recessed downward to form a large unevenness. In this way, the unevenness formed by deforming the cushion layer 240 when the seated person H is seated firmly supports the ischium without shaking to the left or right, and the buttocks of the seated person H are held on the left and right sides of the posture holder. It can be in a sitting position located in the center.

Further, the buttock support portion 1 bears weight on the portion where both thighs abut on the front side of the central recess 3. In the buttock support portion 1, the central convex portion of the base layer 100 is formed by the first convex member 33 attached to the buttock side intermediate layer 31. Further, in the buttock support portion 1, at the front end portion of the buttock side outer shell portion 11, the left and right central portions bulge upward, and a pair of curved surfaces 11B and 11B bulging downward on both sides of the left and right central portions extend in the front-rear direction. It is formed to stretch. Therefore, when the seated person H sits on the buttocks support portion 1, the surface of the portion where the first convex member 33 (central convex portion) is located protrudes upward, and the portion where both thighs abut is recessed and large. Form irregularities. This is because the pressure of both thighs is applied in addition to the presence of the first convex member 33. Further, the buttock support portion 1 has a forward downward inclination on the front side of the central recess 3, and has an overall forward downward inclination.

In this way, the left and right central portions bulge upward at the front end portion of the buttock side outer shell portion 11, and the central convex portion is formed on the base layer 100, so that the posture holder can be used when the seater H is seated. The surface of the cushion layer 40 at the portion where the first convex member 33 (central convex portion) is located protrudes upward, and the pelvis of the seater H can be prevented from slipping forward at this protruding portion. Further, since both sides of the left and right central portions of the buttock side outer shell portion 11 are formed by a pair of curved surfaces bulging downward, the posture holder is large on the left and right sides of the seated person H when the seated person H is seated. The outer surface of the thigh protrudes upward to form irregularities. The buttock support portion 1 on which the unevenness is formed can support the left and right femurs so as to extend straight forward. As a result, the posture holder can support the pelvis without shifting in the left-right direction.

Further, the waist support portion 2 bears weight on the left and right central portions with which the waist portion abuts, above the central recess 3. Since the lumbar side cushion layer 242 is thicker than the buttock side cushion layer 241 as a whole, when the seated person H is seated, the lumbar support portion 2 is recessed in the left and right central portions to form large irregularities even if the weight is small. In this way, the unevenness formed by deforming the cushion layer 240 when the seated person H is seated supports the ilium and the lumbar spine, and the lumbar region of the seated person H is positioned at the center of the left and right sides of the posture holder. Can be.

As described above, in this posture holder, when the seated person H is seated, the surfaces of the buttocks support portion 1 and the lumbar portion support portion 2 can be deformed into a specific uneven shape. The specific uneven shape is an uneven shape formed from the rear portion of the buttock support portion 1 to the lower portion of the lumbar support portion 2 with the central concave portion 3 recessed downward, and is a portion where the first convex member 33 (central convex portion) is located. The surface of the buttock protrudes upward, and the portion where both thighs located on both sides of the buttock abuts is recessed to form the buttock support portion 1, and the left and right central portions are recessed to form the lumbar support portion 2. It is uneven.

In this posture holder, when the seater H is seated, the central recess 3 is recessed downward and the ischium is fitted into the unevenness formed from the rear part of the buttock support portion 1 to the lower part of the lumbar support portion 2 to firmly hold the ischium. Easy to support. Therefore, even if the lumbar region (near the ilium) of the seated person H is pushed forward by the lumbar support portion 2, the pelvis is unlikely to shift forward. Further, since the lumbar support portion 2 pushes the lumbar region (near the ilium) of the seated person forward and the buttocks support portion 1 is inclined forward as a whole, the pelvis is easily tilted forward, and the seated person H Can be seated in the correct posture with an S-shaped spine when viewed from the side.

At this time, since the surface of the portion where the first convex member 33 (central convex portion) is located protrudes upward in this posture holder, the pelvis of the seater H slides forward at this protruding portion. It can be suppressed, and the buttock support portion 1 can appropriately support the ischium that supports the pelvis. In addition, this posture holder can support the left and right femurs of the seated person so as to extend straight forward by the unevenness formed on the buttocks support portion 1 by denting the portion where both thighs abut. Can be supported without shifting in the left-right direction. Further, in this posture holder, since the lumbar side cushion layer 42 is thicker than the buttock side cushion layer 41 as a whole, the lumbar support portion 2 is greatly deformed to make the seating comfort so as to gently wrap the lumbar portion of the seater H. be able to.
In this way, the posture holder allows the seater H to sit in the correct posture.

Further, in this posture holder, the cushion layer 240 is formed of low-resilience urethane foam. Therefore, in this posture holder, the surface of the cushion layer 240 fits snugly on the buttocks and waist of the seated person H, so that the seated person H can easily maintain the correct posture. Further, in this posture holder, when the seater H is seated, the entire body located on the posture holder side of the buttocks and the waist of the seater H comes into contact with the surface of the cushion layer 240, and the body pressure of the seater H is dispersed. Will be done. Therefore, in this posture holder, the weight of the seated person H is not concentrated on the buttocks, and the seated person H can sit for a long time. In addition, the posture-retaining tool protects the part where the load of the seater H is likely to be applied due to the shock absorption of the low-resilience urethane foam, and can make the sitting comfort so that the buttocks and the waist are gently wrapped.

Therefore, the posture holder of the second embodiment can be easily seated in the correct posture.

The present invention is not limited to Examples 1 and 2 described with reference to the above description and drawings, and for example, the following examples are also included in the technical scope of the present invention.
(1) In Examples 1 and 2, a plurality of specific uneven shapes formed by deforming the surfaces of the buttocks support portion and the lumbar support portion when the seated person is seated are provided on the surfaces of the buttocks support portion and the lumbar support portion. However, at least one specific uneven shape formed by deforming the surfaces of the buttocks support portion and the lumbar support portion when the seated person is seated may be provided without providing all of these unevenness.
(2) In Examples 1 and 2, the cushion layer is formed of low-resilience urethane foam, but the cushion layer may be formed of another material as long as it is a low-resilience material.
(3) In Examples 1 and 2, the intermediate layer is formed of high-resilience urethane foam, but other materials as long as they are materials having higher resilience than the cushion layer and lower resilience than the outer shell member. May form an intermediate layer with.
(4) In Examples 1 and 2, an intermediate layer is provided between the outer shell member and the cushion layer, but the intermediate layer may not be provided.
(5) In Examples 1 and 2, the base portion has a central convex portion protruding upward from the surface of the central portion of the front end of the base portion, but the base portion does not have to have the central convex portion.
(6) In Examples 1 and 2, the first convex member is attached to the intermediate layer to form the central convex portion, but the central convex portion may be formed integrally with the intermediate layer.
(7) In the second embodiment, the second convex member is attached to the intermediate layer to form the left and right convex portions, but the central convex portion may be formed integrally with the intermediate layer.
(8) In Examples 1 and 2, the intermediate layer has a constant thickness, but the intermediate layer does not have to have a constant thickness.
(9) The base layer has a surface formed by a curved surface so that the left and right end portions of the buttock side base portion are located above the left and right center portions, and the left and right end sides of the lumbar side base portion are left and right. The outer shape of the base layer does not have to be the outer shape shown in Examples 1 and 2 as long as it has a surface formed by a curved surface that is curved so as to be located on the front side with respect to the central portion.
(10) The outer shape of the cushion layer does not have to be the outer shape shown in Examples 1 and 2 as long as the cushion layer has thicker portions on both the left and right sides than the central left and right portions.

2 ... Lumbar support
12 ... Lumbar side outer shell 40, 240 ... Cushion layer 100 ... Base layer 102 ... Lumbar side base

Claims (2)

A posture holder having a waist support that supports the seated person's waist.
A base layer provided with a lumbar side base portion constituting the back surface side of the lumbar support portion, and
A cushion layer formed of a low-resilience material, which covers the surface of the base layer and constitutes the surface side of the lumbar support portion, and
Equipped with a,
The lumbar-side base portion has a lumbar-side outer shell portion made of hard resin, and has a surface formed by a curved surface whose left and right end sides are located on the front side with respect to the left and right central portions. Posture holder to do. The posture holder according to claim 1 , wherein the cushion layer has portions thicker on both the left and right sides than the central left and right portions .

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