JP2020044399A - Posture holder - Google Patents

Abstract

To provide a posture holder on which a sitting person can easily sit with a correct posture.SOLUTION: The posture holder includes a waist support part that supports the waist of a sitting person. It also includes: a base layer 100 having a waist side base part 102 that constitutes the reverse side of the waist support part 2; and a cushion layer 40 that is formed with a low repulsion material and that constitutes the front side of the waist support part 2 by covering the front of the base layer 100. According to this constitution, the base layer 100 regulates deformation of the cushion layer 40 so that, when the sitting person sits on the posture holder, the cushion layer 40 is prevented from deforming excessively. Further, as this posture holder has the cushion layer 100 formed with the low repulsion material, the cushion layer 100 is deformed in accordance with the body type of the sitting person when he or she sits thereon. Consequently, this posture holder can make the sitting person sit thereon with a correct posture.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a posture holder.

  Patent Document 1 discloses a conventional posture holding device. This posture holder includes a buttocks support portion for supporting the buttocks of a seated person, and a waist support portion for supporting the waist of the seated person continuously at one end of the buttocks support portion. This posture holder is made of a foamed resin such as urethane foam. Since this posture holder has elasticity, it can be accurately placed by being deformed in accordance with the angle between the seat surface of the chair and the backrest when it is placed on the chair. In addition, this posture holding tool has a surface shape in which a portion where the buttocks support portion supports the ischium or the like of the seated person is depressed. In addition, that the buttocks support part supports the sciatic bone of the seated person means that the buttocks support part contacts the buttocks of the seated person and supports the sciatic bone and the like via muscles and fats (the same applies hereinafter). In addition, this posture holding device has a surface shape in which a portion where the waist support portion supports the iliac bone or the like of the seated person is depressed. The expression that the lumbar support supports the iliac or the like of the occupant means that the lumbar support abuts the lumbar of the occupant and supports the iliac or the like via muscles or fat (the same applies hereinafter). . This posture holder can support the ischial bone, the iliac bone, and the like so that the occupant can sit in a correct posture.

JP 2014-12130 A

  However, the posture holding device of Patent Literature 1 needs to maintain a surface shape suitable for the seated person to sit in a correct posture when the seated person is seated. In other words, the buttocks support portion and the waist support portion of the posture holding device have hardness that can maintain the surface shape while having a certain elasticity. For this reason, in this posture holding device, when the seated person is seated, the buttocks support portion and the waist support portion may not conform to the body shape of the seated person. If the buttocks support and the waist support do not match the occupant's body shape, the buttocks and the waist of the occupant partially abut, and the weight of the occupant abuts, especially on the buttocks, for a long time. It may not be possible to sit down.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional circumstances, and has as an object to solve the problem of providing a posture holder that allows a seated person to easily sit in a correct posture.

Attitude holder of the present invention,
A posture holder having a waist support portion for supporting a waist of a seated person,
A base layer including a waist side base portion that constitutes the back side of the waist support portion,
A cushion layer formed of a low resilience material and covering the surface of the base layer and constituting the surface side of the waist support portion,
It is characterized by having.

This posture holder has a base layer. For this reason, in this posture holding device, the base layer regulates the deformation of the cushion layer so that the cushion layer is not excessively deformed when the occupant sits on the posture holding device. Further, in this posture holding device, since the cushion layer is formed of a low-rebound material, the cushion layer is deformed according to the body shape of the seated person when the seated person is seated. For this reason, this posture holding tool allows a seated person to sit in a correct posture.

  Note that the front side of the posture holding device is the side where the buttocks and the waist abut when the occupant sits down, and the back side is the opposite side (the same applies hereinafter). The left, right, up, and down are the left, right, up, and down in a state where the posture holder is placed on a chair or the like so that the seated person sits down and the waist support is viewed from the front (the same applies hereinafter). In addition, before and after, in a state where the posture support is placed on a chair or the like so that a seated person sits down and the buttocks support is viewed from above, the end side of the buttocks support where the waist support is not continuous is forward. And the waist support side is later (the same applies hereinafter).

In this posture holding device, the cushion layer is formed of a low-rebound material. For this reason, in this posture holding device, the surface of the cushion layer fits exactly on the waist of the occupant, so that the occupant can easily maintain a correct posture. In addition, when the occupant sits down, the whole of the posture holding device located on the posture holding device side of the waist of the occupant abuts on the surface of the cushion layer, and the body pressure of the occupant is dispersed. For this reason, with this posture holding device, the weight of the occupant does not concentrate on the buttocks, and the occupant can sit for a long time. In addition, the posture holding device can protect a portion where a load of the occupant is likely to be applied by the shock absorbing property of the low resilience material, and can provide a sitting comfort in which the waist is gently wrapped.

  Therefore, the posture holding device of the present invention can be easily seated in a correct posture.

FIG. 2 is a perspective view illustrating a posture holding tool according to the first embodiment. FIG. 3 is a left-right center sectional view showing the posture holding tool of the first embodiment. FIG. 2 is an exploded perspective view illustrating the posture holding tool according to the first embodiment. FIG. 3 is a plan view showing an outer shell member of the first embodiment. FIG. 5 is a sectional view taken along the line AA in FIG. 4. FIG. 6 is a sectional view taken along line BB of FIG. 4. FIG. 5 is a sectional view taken along the line CC of FIG. 4. FIG. 5 is a sectional view taken along the line DD in FIG. 4. FIG. 2 is a perspective view illustrating an intermediate layer according to the first embodiment. FIG. 3 is a plan view illustrating a cushion layer according to the first embodiment. It is arrow AA sectional drawing of FIG. It is arrow BB sectional drawing of FIG. It is arrow CC sectional drawing of FIG. It is arrow DD sectional drawing of FIG. 4A and 4B show a procedure for assembling the posture holding device of the first embodiment, wherein (I) is a first step of attaching the first frame member to the outer shell member, (II) a second step of attaching the intermediate layer, and (III) is a cushion layer. A third step of attaching, (IV) is a fourth step of attaching the exterior sheet, and (V) is a fifth step of attaching the second frame member. FIG. 3 is a cross-sectional view illustrating a state in which a seated person is seated on the posture holding device of the first embodiment. FIG. 9 is a perspective view illustrating a posture holding tool according to a second embodiment. FIG. 10 is a left-right center sectional view showing a posture holding tool according to a second embodiment. FIG. 9 is a perspective view illustrating an intermediate layer according to a second embodiment. It is a top view which shows the cushion layer of Example 2. FIG. 21 is a sectional view taken along line AA of FIG. 20. FIG. 21 is a sectional view taken along line BB of FIG. 20. FIG. 21 is a sectional view taken along the line CC of FIG. 20. FIG. 21 is a sectional view taken along the line DD in FIG. 20. FIG. 10 is a cross-sectional view illustrating a state in which a seated person is seated on the posture holding device of the second embodiment.

A preferred embodiment of the present invention will be described .
The waist base portion of the posture holding device of the present invention may have a surface formed by a curved surface that is curved so that the left and right ends are located on the front side compared to the left and right central portions.
Cushioning layer in attitude retainer of the present invention, the thickness on the left and right sides than the right and left central portion may have a thicker portion. In this case, in this posture holding device, when the seated person is seated, the cushion layer is deformed according to the body shape of the seated person, and the surface of the lumbar support portion appropriately supports the lumbar region (iliac bone, lumbar spine, etc.). It can be deformed into a concave and convex shape. Even if the seated person has a difference in height, the positions of the bones such as the iliac bone and the lumbar vertebra do not change significantly, so that the lumbar support portion can properly support the lumbar region. For this reason, this posture holding tool allows a seated person to sit in a correct posture.

  Next, Embodiments 1 and 2 that embody 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 holding device of the first embodiment includes a buttocks support portion 1 and a waist support portion 2 that is continuous with the rear end of the buttocks support portion 1. The buttocks support 1 and the waist support 2 are formed integrally. The occupant H sits in a state where the posture holder is placed on the chair C or the like (see FIG. 16).

  The buttocks support portion 1 is thick, has a substantially square shape when viewed from above, and has a front edge 1A recessed rearward from both left and right ends toward the center. The buttocks support portion 1 has a surface shape bulging upward at both left and right ends as compared to the central portion at the left and right. The buttocks support 1 is slightly bulged upward at the left and right central portions of the front end compared to the periphery.

  The waist support 2 is thicker than the hip support 1, has a substantially square shape when viewed from the front, and has upper end edges 2A recessed downward from both left and right ends toward the center. The waist support portion 2 has a surface shape which bulges forward at both left and right end portions as compared to the left and right central portions. Further, in this posture holding device, the boundary between the hip support 1 and the waist support 2 has the narrowest left-right width, and the width from the rear of the hip support 1 to the lower part of the waist support 2 is narrowed. Further, the posture holding device has a central concave portion 3 whose left and right central portions are depressed from the rear portion of the hip support portion 1 to the lower portion of the waist support portion 2 in surface shape. The occupant H sits so that the ischium fits into the central recess 3. In the posture holding device, the buttocks of the seated person H are supported by the buttocks support portion 1, and the waist of the seated person H is supported by the waist support portions 2 (see FIG. 16).

  As shown in FIGS. 2 and 3, the posture holding device 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 holding device has a four-layer structure of an outer shell member 10, an intermediate layer 30, a cushion layer 40, and an exterior sheet 50. In this posture holding device, 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 buttocks-side base portion 101 and a waist-side base portion 102 that is continuous with the rear end of the buttocks-side base portion 101. The buttocks side base portion 101 forms the back side of the buttocks support portion 1, and the waist side base portion 102 forms the back side of the waist support portion 2.

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

  As shown in FIG. 5, the outer shell member 10 has a curved surface in which the rear end of the buttocks-side outer shell 11 and the lower end of the waist-side outer shell 12 bulge outward (in FIG. 5, diagonally lower left). Is continuous. A surface 11S extending in the front-rear and left-right directions of the buttocks-side outer shell portion 11 and a surface 12S expanding vertically and left-right directions of the waist-side outer shell portion 12 have a substantially right and left central cross-sectional shape and a cross-sectional shape parallel to the same. It extends in a direction at an angle of degrees.

  As shown in FIG. 5 and FIG. 6, the buttocks side outer shell portion 11 has a left and right central portion 11F on the front end side bulging upward. That is, the buttocks-side outer shell portion 11 is formed such that a pair of curved surfaces 11B, 11B swelling downward on both sides of the left and right central portion 11F at the front end portion extend in the front-rear direction. As shown in FIGS. 5 and 7, the buttocks side outer shell 11 extends upward while bending toward the left and right ends. In other words, the buttocks-side outer shell 11 has a surface formed by a curved surface 11C that is curved so that both left and right ends are positioned above the left and right central parts. As shown in FIGS. 5 and 8, the waist-side outer shell 12 extends forward while bending toward both left and right ends. That is, the waist side outer shell portion 12 has a surface formed by a curved surface 12C that is curved such that both left and right end portions are located on the front side as compared to the left and right central 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 substantially equal to the thickness of the intermediate layer 30 described later. When attached to the outer shell member 10, the first frame member 20 forms an outer peripheral wall surface having a certain 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 highly resilient 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 intermediate layer 30 has a rear surface shape substantially the same as the surface shape of the outer shell member 10. For this reason, 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 of the outer shell member 10 and the inner surface of the first frame member 20 are tightly fitted without gaps. Can be pasted.

  The intermediate layer 30 has a first convex member 33 forming a central convex portion adhered to the center of the front end of the hip-side intermediate layer 31 constituting the hip-side base portion 101. That is, the first convex member 33 protrudes upward from the surface of the central portion of the front end of the buttocks 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 elongated in the front-rear direction. The size 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 buttocks-side intermediate layer 31. In the middle layer 30, a pair of second protrusion members 34, 34 forming left and right protrusions are stuck on both left and right sides of the buttocks side middle layer 31. That is, the second convex members 34, 34 protrude upward from the right and left surfaces of the buttocks 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 quadrangular prism shape extending from near the front end of the buttocks side intermediate layer 31 to near the rear end. 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 buttocks-side intermediate layer 31.

  As shown in FIG. 3 and FIGS. 10 to 14, the cushion layer 40 is formed of a low-repulsion urethane foam which is a low-repulsion material having a partially different thickness as 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 (the outer shell member 10 and the intermediate layer 30). The back surface of the cushion layer 40 has the same shape as the front surface of the base layer 100 (middle layer 30). Therefore, when the cushion layer 40 is attached to the base layer 100, the back surface can be stuck to the front surface of the base layer 100 without any gap.

  As shown in FIG. 11 and FIG. 12, the cushion layer 40 has thicker portions on both left and right sides than the left and right central portions. The rear end of the buttocks-side cushion layer 41 forming the front side of the buttocks support portion 1 and the lower end of the waist-side cushion layer 42 forming the front side of the waist support portion 2 are continuously and integrally formed. Is formed. In addition, as shown in FIGS. 11 to 14, the waist-side cushion layer 42 of the cushion layer 40 is generally thicker than the hip-side cushion layer 41. When the occupant H sits, the weight of the occupant H is less applied to the waist-side cushion layer 42 than to the buttocks-side cushion layer 41. For this reason, by increasing the thickness of the waist-side cushion layer 42, even if the weight is small, the waist-side cushion layer 42 is greatly deformed, and a sitting comfort that gently wraps the waist of the seated person H can be obtained. .

  As shown in FIGS. 13 and 14, the buttocks-side cushion layer 41 has a surface formed by a curved surface that is curved so that both left and right ends are located above the left and right central portions. The waist-side cushion layer 42 has a surface formed by a curved surface that is curved such that both left and right end portions are located forward of the left and right center portions. That is, in the cushion layer 40, the left and right center portions are recessed from the left and right end portions.

  As shown in FIG. 11, the buttocks side cushion layer 41 has a front end portion 41A at the center in the left and right direction slightly inclined upward toward the front. Also, as shown in FIG. 12, the buttocks side cushion layer 41 has a front end portion 41B on each of the left and right sides at the center in the left and right directions, while gradually decreasing its thickness toward the front, and slightly tilting downward toward the front. ing. As shown in FIGS. 11 and 12, the waist-side cushion layer 42 has a thick portion that extends in the left-right direction at a central portion 42 </ b> A in the up-down direction. The waist-side cushion layer 42 has a substantially flat rear surface and a front portion 42A having a central portion 42A in the vertical direction bulging forward. As shown in FIGS. 3, 11, and 12, the cushion layer 40 forms a concave portion 40A formed in the left and right central portion of the surface from the rear part of the buttocks side cushion layer 41 to the lower part of the waist side cushion layer 42. I have. The concave portion 40A forms the central concave portion 3 of the posture holder.

  As shown in FIGS. 2 and 3, the exterior sheet 50 is a sheet made of a soft resin, and is formed in the same uneven shape as the uneven shape of 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 rear surface can be stuck to the front surface of the cushion layer 40 without any gap. When the occupant H sits, 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 cover 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 a first semi-finished product. Next, as shown in FIG. 15 (II), the second semi-finished product is assembled by bonding the back surface of the intermediate layer 30 to the surface of the outer shell member 10 of the first semi-finished product. Next, as shown in FIG. 15 (III), the third semi-finished product is assembled by bonding the back surface of the cushion layer 40 to the surface of the intermediate layer 30 of the second semi-finished product. Next, as shown in FIG. 15 (IV), the back surface of the exterior sheet 50 is adhered to the 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 cover the outer peripheral edge of the outer sheet 50 of the fourth semi-finished product, and the posture holder is completed.

  As shown in FIGS. 2, 3, 15, and 16, the posture holder has a base layer 100 formed of an outer shell member 10, a first frame member 20, and an intermediate layer 30. The base layer 100 includes a buttock-side base portion 101 and a waist-side base portion 102. The buttocks-side base portion 101 has a surface formed by a curved surface that is curved so that the left and right ends are located above the left and right central portions. In addition, the waist side base portion 102 has a surface formed by a curved surface that is curved so that both left and right end portions are located on the front side as compared with the left and right central portions. For this reason, in this posture holding device, when the occupant H sits on the posture holding device, the base layer 100 prevents the cushion layer 40 from being deformed so that the cushion layer 40 formed of the low rebound urethane foam is not excessively deformed. Regulating. In this posture holding device, the cushion layer 40 is formed of a low-rebound urethane foam, and has thicker portions on the left and right sides than at the left and right central portions.

For this reason, as shown in FIG. 16, when the occupant H is seated, the cushion layer 40 is deformed in accordance with the body shape of the occupant H, It can be deformed into a specific uneven shape whose surface properly supports the buttocks (sciatic bone, femur, etc.) and the lumbar region (iliac bone, lumbar spine, etc.). FIG. 16 is based on the assumption that the seated person is an adult having a height of 160 cm. However, even if the seated person has a difference in height, the positions of the bones such as the ischia, the femur, the iliac bone, and the lumbar vertebra do not change significantly. The part and the waist support can properly support the buttocks and the waist.
That is, when the occupant H sits on the posture holding tool, the cushion layer 40 is deformed as described below.

  When the occupant H is seated so that the ischial fits into the central concave portion 3 formed in the left and right central portion from the rear of the buttocks support portion 1 to the lower portion of the waist support portion 2, the posture holding device has a buttocks in the left and right center of the posture holding device. , And the weight of the occupant H is greater on the left and right central portions than on both the left and right sides as a whole. In addition, the cushion layer 40 has thicker portions on both left and right sides than the left and right central portions. For this reason, when the occupant H is seated on the posture holding tool, the cushion layer 40 is recessed downward at the center in the left and right directions more than in the left and right sides, and the unevenness is increased.

  More specifically, when the occupant H is seated, the posture holding device weighs on the central concave portion 3 into which the ischial is fitted. In this posture holding device, a recess 40A is formed in the cushion layer 40 at the left and right central portions of the surface from the rear part of the hip support part 1 to the lower part of the waist support part 2. In addition, a greater pressure on the buttocks (the weight of the occupant H) is applied to the left and right central portions than to the left and right sides. For this reason, when the occupant H sits on the posture holding tool, the central recess 3 is recessed downward to form large unevenness. As described above, the unevenness formed by the deformation of the cushion layer 40 when the seated person H is seated supports the ischium firmly without being shaken left and right, and the buttocks of the seated person H are moved to the left and right sides of the posture holder. The seating posture positioned in the center can be set.

  In addition, the buttocks support portion 1 weighs on the portion in front of the central concave portion 3 where the thighs abut. The buttocks support portion 1 has a central protruding portion of the base layer 100 formed by the first protruding member 33 attached to the buttocks side intermediate layer 31, and the second convex members 34 and 34 attached to the buttocks side intermediate layer 31. Thereby, left and right convex portions of the base layer 100 are formed. In addition, the buttocks support portion 1 has a pair of curved surfaces 11B, 11B that are bulged downward at both sides of the left and right central portions at the front end of the buttocks-side outer shell portion 11 in the front-rear direction. It is formed to extend. Therefore, when the occupant H sits on the buttocks support portion 1, the surfaces of the portion where the first convex member 33 (the central convex portion) is located and the surface where the second convex members 34 and 34 (the left and right convex portions) are located are positioned. A portion protruding upward and abutting between the thighs located therebetween is concave to form large irregularities. In addition, the buttocks support portion 1 is inclined forward and downward on the front side with respect to the central concave portion 3, and is entirely inclined forward and downward.

  As described above, the left and right central portions bulge upward at the front end of the buttocks-side outer shell portion 11 and the central convex portion is formed on the base layer 100. The surface of the cushion layer 40 where the first convex member 33 (central convex portion) is located protrudes upward, and the pelvis of the seated person H can be prevented from sliding forward at the protruding portion. Further, the left and right central portions of the buttocks side outer shell 11 are formed by a pair of curved surfaces 11B, 11B swelling downward, and the left and right convex portions are formed on the base layer 100. When the occupant H sits, the surface of the cushion layer 40 where the second convex members 34, 34 (left and right convex portions) are located protrudes upward to form irregularities. The buttocks support portion 1 having the irregularities can support the left and right femurs to extend straight forward. This allows the posture holder to support the pelvis without shifting in the left-right direction.

  In addition, the waist support portion 2 weighs the right and left central portions where the waist abuts above the central concave portion 3. Since the waist-side cushion layer 42 is generally thicker than the buttocks-side cushion layer 41, when the occupant H sits down, the waist support portion 2 is recessed at the left and right central portions to form large irregularities even if the weight is small. In this manner, the unevenness formed by the deformation of the cushion layer 40 when the seated person H is seated supports the iliac bones and the lumbar spine, and the waist of the seated person H is positioned at the left and right center of the position holder. Can be

  As described above, when the occupant H sits on the posture holding device, the surfaces of the buttocks support portion 1 and the waist support portion 2 can be deformed into a specific uneven shape. The specific concavo-convex shape is a concavity and convexity formed from the rear part of the hip support part 1 to the lower part of the waist support part 2 with the central concave part 3 depressed downward, and the part where the first convex member 33 (central convex part) is located. The surface of the portion where the second convex members 34 and 34 (left and right convex portions) are located protrudes upward, and the portion where the thighs located between them protrudes is recessed and is formed by unevenness formed on the buttocks support portion 1. There are concave and convex portions formed on the waist support portion 2 with the left and right central portions depressed.

  When the occupant H is seated, the central recess 3 is depressed downward, and the sciatic fits into the unevenness formed from the rear part of the hip support part 1 to the lower part of the lumbar support part 2. And easy to support. For this reason, even if the waist (the vicinity of the iliac) of the seated person H is pushed forward by the waist support 2, the pelvis is unlikely to shift forward. In addition, the waist (the vicinity of the iliac) of the seated person is pushed forward by the waist support portion 2 and the buttocks support portion 1 is inclined forward and downward as a whole, so that the pelvis is easily inclined forward and the seated person H Can be seated in a correct posture in which the spine is S-shaped 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, the posture holding tool prevents the pelvis of the seated person H from sliding forward at the protruding portion. The buttock supporting portion 1 can appropriately support the sciatic supporting the pelvis. In this posture holding device, the surface of the portion where the first convex member 33 (central convex portion) is located and the surface of the portion where the second convex members 34 and 34 (left and right convex portions) are located project upward, and the position between Due to the unevenness formed on the buttocks support portion 1 with the portion where the two thighs abut contacting each other, the left and right femurs of the seated person can be supported so as to extend straight forward, and the pelvis does not shift in the left and right direction Can be supported. Further, in this posture holding device, since the waist side cushion layer 42 is generally thicker than the buttocks side cushion layer 41, the waist support part 2 is greatly deformed, and the sitting comfort is such that the waist of the occupant H is gently wrapped. be able to.
As described above, this posture holding tool allows the occupant H to sit in a correct posture.

  In this posture holding device, the cushion layer 40 is formed of a low-rebound urethane foam. For this reason, in this posture holding device, the surface of the cushion layer 40 fits exactly on the buttocks and the waist of the seated person H, so that the seated person H can easily maintain a correct posture. In addition, when the occupant H is seated, the whole body located on the buttocks and the waist of the occupant H on the posture holder side abuts on the surface of the cushion layer 40, and the body pressure of the occupant H is dispersed. Is done. For this reason, with this posture holding device, the weight of the occupant H does not concentrate on the buttocks, and the occupant H can sit for a long time. In addition, the posture holding device can protect a portion where the load of the occupant H is likely to be applied by the shock absorbing property of the low-repulsion urethane foam, and can provide a sitting comfort in which the buttocks and the waist are gently wrapped.

  Therefore, the posture holding device of the first embodiment can easily sit in a correct posture.

<Example 2>
As shown in FIGS. 17 to 25, the posture holding device of the second embodiment is different from the cushion in that the second convex member is not attached to the intermediate layer 230 and only the first convex member 33 is attached. The difference from the first embodiment is that the thickness of the layer 240 is smaller than that of the first embodiment, and that the pattern is formed by a plurality of curves 250A obtained by recessing the surface of the exterior sheet 250 in a groove shape. Other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIG. 19, the intermediate layer 230 is formed of a high-repulsion 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 intermediate layer 230 has a rear surface shape substantially the same as the 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 of the intermediate layer 230 are tightly fitted to the surface of the outer shell member 10 and the inner surface of the first frame member 20 without gaps. Can be pasted.

  In the middle layer 230, the first convex member 33 forming the central convex portion is attached to the center of the front end of the buttocks side intermediate layer 231 constituting the buttocks side base portion 101. That is, the first convex member 33 protrudes upward from the surface of the central portion of the front end of the buttocks side base portion 101. The first convex member 33 is formed of a high resilience urethane foam. The first convex member 33 has a rectangular parallelepiped shape elongated in the front-rear direction. The size of the first convex member 33 in the front-rear direction is about １ ／ of the length in the front-rear direction of the buttocks-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 has a larger difference in surface irregularities than the cushion layer 40 of the first embodiment. The back surface of the cushion layer 40 has the same shape as the cushion layer of the first embodiment, and has the same shape as the surface 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 stuck to the front surface of the base layer 100 without any gap.

  As shown in FIGS. 21 and 22, the cushion layer 240 has thicker portions on both the left and right sides than the left and right central portions. In the cushion layer 240, the rear end of the buttocks side cushion layer 241 forming the front side of the buttocks support portion 1 and the lower end of the waist side cushion layer 242 forming the front side of the waist support portion 2 are continuously and integrally formed. Is formed. As shown in FIGS. 21 to 24, the waist side cushion layer 242 of the cushion layer 240 is generally thicker than the buttocks side cushion layer 241. As shown in FIGS. 23 and 24, the buttocks side cushion layer 241 has a surface formed with a curved surface that is curved such that both left and right ends are located above the left and right central portions. The waist-side cushion layer 242 has a surface formed by a curved surface that is curved such that both left and right end portions are located forward of the left and right center portions. That is, the cushion layer 240 is recessed at the left and right central portions from the left and right end portions.

  As shown in FIG. 21, the buttocks side cushion layer 241 has a front end portion 241A at the center in the left and right direction and is slightly upwardly inclined toward the front. In addition, as shown in FIG. 22, the buttocks side cushion layer 41 has a front end portion 241B on each of the left and right sides at the center in the left and right directions, while gradually decreasing its thickness toward the front, and slightly tilting downward toward the front. ing. As shown in FIGS. 21 and 22, the waist-side cushion layer 242 has a thicker portion extending in the left-right direction at the center 242A in the up-down direction. The waist-side cushion layer 42 has a substantially flat rear surface and a front portion 242A in the vertical direction bulging forward at the front surface. As shown in FIGS. 21 to 24, the cushion layer 240 has a concave portion 240 </ b> A formed in the left and right central portion of the surface from the rear part of the buttocks side cushion layer 241 to the lower part of the waist side cushion layer 242. The concave portion 240A forms the central concave portion 3 of the posture holder.

  As shown in FIGS. 17 and 18, the exterior sheet 50 is a sheet made of a soft resin, and is formed into the same irregularities as the irregularities on 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 rear surface can be stuck to the front surface of the cushion layer 40 without any gap. Further, the pattern of the exterior sheet 50 is formed by a plurality of curves 250 </ b> A whose surface is recessed in a groove shape. When the occupant H sits, the exterior sheet 50 is deformed along with the deformation of the cushion layer 40.

The procedure for assembling this posture holder is the same as in the first embodiment.
Also in this posture holding device, 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 waist-side base portion 102. The buttocks-side base portion 101 has a surface formed by a curved surface that is curved so that the left and right ends are located above the left and right central portions. In addition, the waist side base portion 102 has a surface formed by a curved surface that is curved so that both left and right end portions are located on the front side as compared with the left and right central portions. For this reason, in this posture holding device, when the occupant H sits on the posture holding device, the base layer 100 prevents the cushion layer 40 from being deformed so that the cushion layer 40 formed of the low rebound urethane foam is not excessively deformed. Regulating. In this posture holding device, the cushion layer 40 is formed of a low-rebound urethane foam, and has thicker portions on the left and right sides than at the left and right central portions.

For this reason, as shown in FIG. 25, when the occupant H is seated, the cushion layer 240 is deformed in accordance with the body shape of the occupant H, The surface can be deformed into a concavo-convex shape that properly supports the buttocks (sciatic bones, femurs, etc.) and the lumbar region (iliac bones, lumbar spine, etc.) FIG. 25 also assumes that the occupant is an adult having a height of 160 cm. However, even if there is a difference in height between the occupants, the positions of the bones such as the ischia, the femur, the iliac, and the lumbar vertebra do not change so much. The part and the waist support can properly support the buttocks and the waist.
That is, when the occupant H sits on the posture holding tool, the cushion layer 240 is deformed as described below.

  When the occupant H is seated so that the ischial fits into the central concave portion 3 formed in the left and right central portion from the rear of the buttocks support portion 1 to the lower portion of the waist support portion 2, the posture holding device has a buttocks in the left and right center of the posture holding device. , And the weight of the occupant H is greater on the left and right central portions than on both the left and right sides as a whole. In addition, the cushion layer 240 has thicker portions on both left and right sides than the left and right central portions. For this reason, when the occupant H sits on this posture holding tool, the cushion layer 240 is recessed downward at the left and right central portions more than at the left and right sides, and the unevenness becomes large.

  More specifically, when the occupant H is seated, the posture holding device weighs on the central concave portion 3 into which the ischial is fitted. In this posture holder, a recess 240A is formed in the cushion layer 240 from the rear part of the hip support part 1 to the lower part of the waist support part 2 at the center on the left and right sides of the surface. In addition, a greater pressure on the buttocks (the weight of the occupant H) is applied to the left and right central portions than to the left and right sides. For this reason, when the occupant H sits on the posture holding tool, the central recess 3 is recessed downward to form large unevenness. As described above, the unevenness formed by the deformation of the cushion layer 240 when the seated person H is seated supports the ischium firmly without shifting to the left and right, and the buttocks of the seated person H are moved to the left and right of the posture holder. The seating posture positioned in the center can be set.

  In addition, the buttocks support portion 1 weighs on the portion in front of the central concave portion 3 where the thighs abut. The buttocks support portion 1 has a central protruding portion of the base layer 100 formed by the first protruding member 33 attached to the buttocks side intermediate layer 31. In addition, the buttocks support portion 1 has a pair of curved surfaces 11B, 11B that are bulged downward at both sides of the left and right central portions at the front end of the buttocks-side outer shell portion 11 in the front-rear direction. It is formed to extend. For this reason, when the occupant 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 come into contact is concave 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. In addition, the buttocks support portion 1 is inclined forward and downward on the front side with respect to the central concave portion 3, and is entirely inclined forward and downward.

  As described above, the left and right central portions bulge upward at the front end of the buttocks-side outer shell portion 11 and the central convex portion is formed on the base layer 100. The surface of the cushion layer 40 where the first convex member 33 (central convex portion) is located protrudes upward, and the pelvis of the seated person H can be prevented from sliding forward at the protruding portion. Also, since the left and right central portions of the buttocks-side outer shell 11 are formed by a pair of curved surfaces swelling downward, the posture holding device allows the occupant H to be large when the occupant H is seated. The outer surface of the thigh protrudes upward to form irregularities. The buttocks support portion 1 having the irregularities can support the left and right femurs to extend straight forward. This allows the posture holder to support the pelvis without shifting in the left-right direction.

  In addition, the waist support portion 2 weighs the right and left central portions where the waist abuts above the central concave portion 3. Since the waist-side cushion layer 242 is generally thicker than the buttocks-side cushion layer 241, when the occupant H sits down, the waist support portion 2 is recessed at the left and right central portions to form large irregularities even if the weight is small. As described above, the unevenness formed by the deformation of the cushion layer 240 when the seated person H is seated supports the iliac bone and the lumbar spine, and the waist of the seated person H is positioned at the left and right center of the position holder. Can be

  As described above, when the occupant H sits on the posture holding device, the surfaces of the buttocks support portion 1 and the waist support portion 2 can be deformed into a specific uneven shape. The specific concavo-convex shape is a concavity and convexity formed from the rear part of the hip support part 1 to the lower part of the waist support part 2 with the central concave part 3 depressed downward, and the part where the first convex member 33 (central convex part) is located. The upper surface protrudes upward, the portions where the thighs located on both sides of the upper surface abut are recessed and are irregularities formed on the hip support portion 1, and the left and right central portions are recessed and formed on the waist support portion 2. It is uneven.

  When the occupant H is seated, the central recess 3 is depressed downward, and the sciatic fits into the unevenness formed from the rear part of the hip support part 1 to the lower part of the lumbar support part 2. And easy to support. For this reason, even if the waist (the vicinity of the iliac) of the seated person H is pushed forward by the waist support 2, the pelvis is unlikely to shift forward. In addition, the waist (the vicinity of the iliac) of the seated person is pushed forward by the waist support portion 2 and the buttocks support portion 1 is inclined forward and downward as a whole, so that the pelvis is easily inclined forward and the seated person H Can be seated in a correct posture in which the spine is S-shaped 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, the posture holding tool prevents the pelvis of the seated person H from sliding forward at the protruding portion. The buttock supporting portion 1 can appropriately support the sciatic supporting the pelvis. In addition, the posture holding device can support the left and right femurs of the seated person to extend straight forward by the unevenness formed in the buttocks support portion 1 with the portion where both thighs come into contact is depressed. Can be supported without shifting in the left-right direction. Further, in this posture holding device, since the waist side cushion layer 42 is generally thicker than the buttocks side cushion layer 41, the waist support part 2 is greatly deformed, and the sitting comfort is such that the waist of the occupant H is gently wrapped. be able to.
As described above, this posture holding tool allows the occupant H to sit in a correct posture.

  Also in this posture holding device, the cushion layer 240 is formed of a low-rebound urethane foam. For this reason, in this posture holding device, the surface of the cushion layer 240 fits exactly on the buttocks and the waist of the seated person H, so that the seated person H can easily maintain a correct posture. In addition, when the occupant H is seated, the whole body located on the buttocks and the waist of the occupant H on the side of the posture holder comes into contact with the surface of the cushion layer 240 and the body pressure of the occupant H is dispersed. Is done. For this reason, with this posture holding device, the weight of the occupant H does not concentrate on the buttocks, and the occupant H can sit for a long time. In addition, the posture holding device can protect a portion where the load of the occupant H is likely to be applied by the shock absorbing property of the low-repulsion urethane foam, and can provide a sitting comfort in which the buttocks and the waist are gently wrapped.

  Therefore, the posture holding device of the second embodiment can be easily seated in a correct posture.

The present invention is not limited to the first and second embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first and second embodiments, a plurality of specific irregularities formed by deforming the surfaces of the buttocks support portion and the waist support portion when the seated person is seated are provided on the surfaces of the buttocks support portion and the waist support portion. However, when the occupant sits down, at least one specific uneven shape formed by deforming the surfaces of the buttocks support portion and the waist support portion may be provided without providing all of these unevenness.
(2) In the first and second embodiments, the cushion layer is formed of a low-rebound urethane foam. However, the cushion layer may be formed of another material as long as it is a low-repulsion material.
(3) In Examples 1 and 2, the intermediate layer is formed of a high resilience urethane foam. However, any other material that has a higher resilience than the cushion layer and a lower resilience than the outer shell member can be used. May form an intermediate layer.
(4) In the first and second embodiments, the intermediate layer is provided between the outer shell member and the cushion layer. However, the intermediate layer may not be provided.
(5) In the first and second embodiments, the base portion has the central convex portion protruding upward from the surface of the front end central portion, but the base portion may not have the central convex portion.
(6) In the first and second embodiments, the first convex member is attached to the intermediate layer to form the central convex portion. However, the central convex portion may be formed integrally with the intermediate layer.
(7) In the second embodiment, the left and right convex portions are formed by attaching the second convex member to the intermediate layer. However, 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 of a curved surface that is curved so that the right and left ends of the buttocks-side base portion are located above the left and right center portions, and the right and left ends of the waist base portion are left and right. The outer shape of the base layer may not be the outer shape shown in the first and second embodiments, as long as the base layer has a surface formed by a curved surface that is curved so as to be located on the front side relative to the central portion.
(10) The outer shape of the cushion layer need not be the outer shape shown in the first and second embodiments as long as the cushion layer has thicker portions on both the left and right sides than the left and right central portions.

2. Lumbar support parts 40, 240 Cushion layer 100 Base layer 102 Lumbar base part

Claims (3)

  A posture holder having a waist support portion for supporting a waist of a seated person,
  A base layer including a waist side base portion that constitutes the back side of the waist support portion,
  A cushion layer formed of a low resilience material and covering the surface of the base layer and constituting the surface side of the waist support portion,
  A posture holder comprising:   The posture holding device according to claim 1, wherein the waist side base portion has a surface formed by a curved surface that is curved so that left and right ends are located on the front side as compared with the left and right central portions.   The posture holding device according to claim 1, wherein the cushion layer has thicker portions on both left and right sides than the left and right central portions.

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