JP2024134227A - Cushion body - Google Patents

Abstract

To provide a cushion body for enabling a user to keep an excellent posture in both of cases where the user is sitting and where the user is lying.SOLUTION: A cushion body 1 includes: a first part 2; and a second part 3 which is integrally molded with the first part 2 and extends from an end of the first part 2 in a first direction D1 to a third direction D3. The first part 2 and the second part 3 are constituted by a flexible base material. The first part 2 includes: a top surface 2a where a hip support part 5 for supporting hips of a user and a first back support part 4 for supporting the back of the user are formed; and a bottom surface 2b positioned on the opposite side of the top surface 2a. The second part 3 includes: a rear surface 3a extending from an end of the bottom surface 2b in the first direction D1 to the third direction D3; and a front surface 3b positioned on the opposite side of the rear surface 3a. A second back support part 7 for supporting the back of the user and a head support part 8 for supporting the head of the user are formed on the front surface 3b.SELECTED DRAWING: Figure 1

Description

This disclosure relates to a cushion body.

Patent Document 1 describes a pillow that includes a pillow body that is rectangular in plan view, and a secondary pillow section that is provided on the central upper surface of the pillow body and bulges out from front to back. The pillow body and secondary pillow section are stuffed with highly fluid tiny polystyrene foam beads. When a user uses the pillow while sleeping, the pillow can support the user's head when the user is lying on their back, side, or stomach.

JP 2022-092844 A

It is generally known that people tend to have poor posture during their off-time, such as when relaxing at home. Places where people often spend their off-time include, for example, the sofa, the floor, or the bed. Possessions that people tend to assume during their off-time include, for example, sleeping on their back, sleeping on their side, sleeping on their stomach, or sitting. When people assume a variety of such postures, it is desirable to maintain good posture.

The present disclosure aims to provide a cushion body that can maintain a good posture of the user both when the user is seated and when the user is lying down.

The cushion body according to the present disclosure includes (1) a first portion that extends in both a first direction and a second direction intersecting the first direction and has a thickness in a third direction intersecting both the first direction and the second direction, and a second portion that is integrally molded with the first portion and extends in the third direction from an end of the first portion in the first direction. The first portion and the second portion are made of a flexible material. The first portion has a top surface on which a buttocks support portion that supports the buttocks of a user and a first back support portion that supports the back of the user are formed, and a bottom surface located opposite the top surface. The second portion has a rear surface that extends in the third direction from an end of the bottom surface in the first direction, and a front surface located opposite the rear surface. The front surface is formed with a second back support portion that supports the back of the user, and a head support portion that supports the head of the user.

In this cushion body, when the user is seated, the buttocks of the user are supported by the buttock support portion, and the back of the user is supported by the second back support portion. When the user is lying on his/her back, the back of the user is supported by the first back support portion, and the head of the user is supported by the head support portion. In addition, since the first and second portions are made of a flexible material, the shape changes to adapt to the user's posture. And, since the second portion is integrally molded with the first portion, the position of the second portion relative to the first portion is unlikely to change significantly. Therefore, when sitting, the buttocks can be supported by the buttock support portion formed in the first portion, and the back can be supported by the second back support portion formed in the second portion, so that the posture when sitting can be maintained in a good state. In addition, when the user lies down, the back can be supported by the first back support portion formed in the first portion, and the head can be supported by the head support portion formed in the second portion, so that the posture when lying down can be maintained in a good state. This allows the user to maintain good posture whether they are sitting or lying down.

(2) In the above (1), the first back support part may be inclined with respect to the bottom surface, and the inclination angle of the tangent line passing through the top of the first back support part with respect to the bottom surface may be 20° or more and 40° or less. Since the inclination angle of the tangent line passing through the top of the first back support part with respect to the bottom surface is 20° or more and 40° or less, the first back support part is inclined with respect to the bottom surface so as to rise as it approaches the second part. When the inclination angle is 20° or more, the angle of the body when lying on the cushion body can be inclined appropriately. When the inclination angle is 40° or less, the body can be prevented from inclining too much. When the inclination angle is 20° or more and 40° or less, the upper body of the user who places his/her back on the first back support part is inclined at an appropriate angle with respect to the bottom surface. As a result, the user's head is easily placed on the head support part, and the inclination of the user's body when sleeping can be brought closer to an appropriate angle, so that the user's posture can be maintained in a good state.

(3) In the above (1) or (2), the first part may have a humerus support part on the top surface that supports the humerus of a user who sleeps on his/her side, and the humerus support part may have a shoulder support part located at the center of the top surface in the second direction, and an arm support part extending from the shoulder support part toward an end of the top surface in the second direction. Since the shoulder support part is located at the center of the top surface in the second direction, it is easy to place the shoulder of a user who sleeps on his/her side on the shoulder support part, and the shoulder support part can support the shoulder more effectively. Since the arm support part extends from the shoulder support part toward an end of the top surface in the second direction, the user's arm is easily placed on the arm support part with the shoulder supported by the shoulder support part, and the arm support part can support the arm more effectively. As a result, the shoulder of a user who sleeps on his/her side can be supported by the shoulder support part and the arm can be supported by the arm support part, so that the user's posture when sleeping on his/her side can be maintained in a good state.

(4) In the above (3), the first portion may have a pair of arm support parts aligned along the second direction. In this case, regardless of whether the user places their right or left shoulder on the shoulder support parts, the arm extending from the shoulder in contact with the shoulder support parts can be supported by one of the pair of arm support parts extending to the left or right.

(5) In any of (1) to (4) above, the buttocks support portion may be recessed from the top surface to the bottom surface and may have a pair of ischial support portions aligned along the second direction. When the user is seated on the buttocks support portion, the user's ischial bones are supported by the ischial support portions. This reduces the burden on the user's ischial bones.

(6) In any of (1) to (5) above, the second back support portion may have a first constricted portion that is recessed so that the length of the second portion in the first direction is reduced. When a load is applied to the second portion in the third direction, the second portion is more likely to bend via the first constricted portion. Thus, when a user applies a load to the second portion in the third direction, the second portion can be appropriately deformed. The moderate deformation of the second portion allows the user to feel softness.

(7) In any of (1) to (6) above, the rear surface may have a second constricted portion that is recessed so that the length of the second portion in the first direction is reduced. When a load is applied to the second portion in the third direction, the second portion is more likely to bend via the second constricted portion. Thus, when a user applies a load to the second portion in the third direction, the second portion can be appropriately deformed. The moderate deformation of the second portion allows the user to feel softness.

According to the present disclosure, the user's posture can be maintained in a good state both when the user is seated and when the user is lying down.

FIG. 1 is a perspective view showing a cushion body according to the present embodiment. FIG. 2 is a plan view of the cushion body. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a partially enlarged view of FIG. FIG. 5 is a side view of the cushion body. FIG. 6 is a front view of the cushion body. FIG. 7 is a rear view of the cushion body. FIG. 8 is a side view of the cushion body and a user lying on his/her back on the cushion body. FIG. 9 is a side view of the cushion body and a user lying on his/her side on the cushion body.

Below, an embodiment of a cushion body according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions will be omitted as appropriate. The drawings may be partially simplified or exaggerated to facilitate understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

Figure 1 is a perspective view showing a cushion body 1 according to this embodiment. The cushion body 1 can be used both when sitting and when lying down. The cushion body 1 is a cushion body that can maintain a good posture of the user by appropriately supporting the bones of the user based on ergonomics and sleep science. The cushion body 1 is used, for example, during off-time. However, the cushion body 1 can also be used in other than off-time. The cushion body 1 can be used, for example, in four different ways. The four different ways are to sit on the cushion body 1, to sleep on one's back, to sleep on one's side, and to sleep on one's stomach. The cushion body 1 is placed, for example, on a floor or a sofa in a room.

For example, the cushion body 1 is used while being housed in the outer fabric. In this case, the cushion body 1 is used as the core material of the cushion. The outer fabric is, as an example, made of fabric. As shown in FIG. 1, the cushion body 1 has a first portion 2 extending horizontally and a second portion 3 extending upward from the first portion 2.

For example, the first part 2 is a part on which the buttocks of a person sitting on the cushion are placed, and also a part on which the back of a person lying on the cushion are placed. For example, the second part 3 is a part on which the upper body of a person sitting on the cushion are placed, and also a part on which the head of a person lying on the cushion are placed. The first part 2 and the second part 3 are made of a flexible material. The flexible material is a material that maintains its shape appropriately even when weight is applied from the human body, and that deforms to fit the contours of the user's body. The cushion body 1 is made of, for example, a highly resilient urethane foam. The cushion body 1 may be made of EVA (Ethylene Vinyl Acetate) or rubber. The cushion body 1 may be made of a highly durable material.

As an example, the cushion body 1 is formed by urethane molding. When the cushion body 1 is made of urethane foam and formed by urethane molding, the cushion body 1 made of a flexible material can be easily manufactured.

In the following, the forward direction as seen by a user seated on the first part 2 may be referred to as "front", "front side" or "forward", the opposite direction to the forward direction may be referred to as "rear", "rear side" or "rear", and the upward direction as seen by the user may be referred to as "upper", "upper side" or "above". However, these directions are for convenience of explanation and do not limit the position or orientation of each part.

The first part 2 has a rectangular shape in a plan view. The first part 2 extends in a first direction D1 and a second direction D2 intersecting the first direction D1. The first direction D1 is the front-to-back direction when seen by a user seated on the first part 2, and the second direction D2 is the left-to-right direction when seen by a user seated on the first part 2. The first part 2 has a thickness in a third direction D3 that intersects both the first direction D1 and the second direction D2. For example, the third direction D3 is a vertical direction.

For example, the length of the cushion body 1 in the first direction D1 (front-rear direction) is longer than the length of the cushion body 1 in the second direction D2 (left-right direction) and longer than the length of the cushion body 1 in the third direction D3 (vertical direction). The length of the cushion body 1 in the second direction D2 is longer than the length of the cushion body 1 in the third direction D3 (vertical direction). The length of the cushion body 1 in the first direction D1 is, for example, 500 mm or more and 800 mm or less (630 mm as an example). The length of the cushion body 1 in the second direction D2 is, for example, 400 mm or more and 600 mm or less (510 mm as an example). The length of the cushion body 1 in the third direction D3 is, for example, 200 mm or more and 500 mm or less (335 mm, for example).

Figure 2 is a plan view of the cushion body 1. As shown in Figures 1 and 2, the first portion 2 has a top surface 2a facing upward, a bottom surface 2b facing the opposite side of the top surface 2a, a front end 2c that is farther from the second portion 3 among the ends in the first direction D1, and a rear end 2d that is located on the opposite side of the front end 2c. The top surface 2a has a pair of side ends 2e that are ends in the second direction D2.

The first portion 2 has an inclined portion 2f on each side of the top surface 2a in the second direction D2. The first portion 2 has a pair of inclined portions 2f aligned along the second direction D2. The inclined portions 2f extend obliquely with respect to both the first direction D1 and the second direction D2 so as to approach the second portion 3 toward the center of the top surface 2a in the second direction D2.

On the top surface 2a, a first back support section 4 that supports the back of a user lying on his back, a buttock support section 5 that supports the buttocks of a user lying on his seat, and a humerus support section 6 that supports the humerus of a user lying on his side are formed. The first back support section 4 and the buttock support section 5 are arranged in a line along the first direction D1. For example, the first back support section 4 is formed at a position farther away from the second part 3 than the buttock support section 5. The first back support section 4 is formed in an area including the front end section 2c on the top surface 2a. For example, the first back support section 4 has a smooth surface, which supports the back of a user lying on his back and supports the flanks of a user lying on his side. The "smooth surface" refers to a smooth surface that does not have any unevenness that would cause a user to feel uncomfortable when the user places the body on it. The "smooth surface" includes a flat surface and a curved surface.

In plan view (when viewed along the third direction D3), for example, the first back support part 4 has a pentagonal shape. The length of the first back support part 4 in the first direction D1 increases toward the center of the first part 2 in the second direction D2. In this embodiment, the first back support part 4 is defined by a front end part 2c, a pair of side ends 2e, and a pair of arm support parts 62. The front end part 2c is curved outward. More specifically, the front end part 2c is curved so as to move away from the second part 3 as it approaches the center of the second direction D2. The pair of arm support parts 62 are connected to each other via a curved part 63. The curved part 63 protrudes so as to extend toward the second part 3 as it approaches the center of the second direction D2.

Figure 3 is a cross-sectional view taken along line III-III in Figure 2. As shown in Figure 3, the first back support portion 4 is inclined relative to the bottom surface 2b. More specifically, the first back support portion 4 rises away from the bottom surface 2b the further it is from the front end portion 2c. In other words, the first back support portion 4 extends obliquely relative to the bottom surface 2b such that the thickness of the first portion 2 increases the closer it is to the second portion 3. The further it is from the front end portion 2c, the more gently the first back support portion 4 rises.

Figure 4 is a partially enlarged view of Figure 3. The first back support portion 4 has a top portion 4a, which is the region of the first back support portion 4 adjacent to the front end portion 2c. As shown in Figure 4, the angle θ of the tangent line L passing through the top portion 4a with respect to the bottom surface 2b is, for example, 30°. The angle θ of the tangent line L with respect to the bottom surface 2b may be, for example, 20° or more and 40° or less.

1 and 2, the buttocks support part 5 is located in the center of the cushion body 1 in the second direction D2. In the second direction D2, the buttocks support part 5 is sandwiched between a pair of inclined parts 2f of the first part 2. The buttocks support part 5 is recessed with respect to the inclined parts 2f. For example, the length of the buttocks support part 5 in the second direction D2 increases the farther it is from the second part 3. The shape of the buttocks support part 5 is shaped to fit the buttocks of the user. The buttocks support part 5 has a recess into which the buttocks of the user fit. When the user sits down, the buttocks of the user fit into the recess of the buttocks support part 5, and the buttocks of the user are supported by the buttocks support part 5.

The buttock support portion 5 has a pair of ischial support portions 51 that support the ischial bones of a user seated on the first portion 2. The pair of ischial support portions 51 are aligned along the second direction D2. The ischial support portions 51 are recessed from the top surface 2a toward the bottom surface 2b. The ischial support portions 51 may have a through hole 51b that penetrates the first portion 2 from the top surface 2a toward the bottom surface 2b. The ischial support portions 51 have an oval shape (an elliptical shape, for example) in a plan view. The major axes of the ovals of the pair of ischial support portions 51 are farther apart from each other as they approach the second portion 3. For example, when the cushion body 1 is viewed in a plan view with the second portion 3 facing upward, the pair of ischial support portions 51 have an inverted V shape.

The length of the long axis of the ischial support portion 51 in plan view is, for example, 5 cm or more and 10 cm or less. As an example, the length of the long axis is 7 cm. The length of the short axis of the ischial support portion 51 in plan view is, for example, 3 cm or more and 9 cm or less. As an example, the length of the short axis is 5 cm. When each length is within the above value range, the user's ischial bones can be more suitably fitted to each of the pair of ischial support portions 51.

As described above, the ischium support portion 51 is recessed from the upper surface of the buttock support portion 5. For example, the ischium support portion 51 has a through hole 51b and an inclined surface 51c formed to surround the through hole 51b in a plan view. As an example, the ischium support portion 51 has a plurality of inclined surfaces 51c. The plurality of inclined surfaces 51c includes a first annular inclined surface 51d formed to surround the through hole 51b in a plan view, and a second annular inclined surface 51f formed to surround the first inclined surface 51d in a plan view.

The above describes the ischial support part 51 having the through hole 51b and the inclined surface 51c. However, the ischial support part does not have to have at least one of the through hole 51b and the inclined surface 51c. The ischial support part may be a concave non-through hole. The ischial support part may also have a concave non-through hole and a flexible material filled in the non-through hole. In this case as well, the ischial support part can gently support the ischial bones of the user.

The above describes the ischial support portion 51 that has an oval (elliptical) shape in plan view. However, the shape of the ischial support portion in plan view does not have to be oval or elliptical, and may be rectangular, rectangular with rounded corners, diamond, or diamond with rounded corners. In this way, the shape of the ischial support portion can be changed as appropriate.

The humerus support portion 6 is formed so that a portion of the humerus support portion 6 overlaps the buttocks support portion 5 in a plan view. The humerus support portion 6 has a shoulder support portion 61 that supports the shoulder of a user who is sleeping on his/her side, and a pair of arm support portions 62 that support the upper arms of a user who is sleeping on his/her side. For example, the shoulder support portion 61 is disposed between the second portion 3 and the first back support portion 4. The shoulder support portion 61 may be disposed between the second portion 3 and the buttocks support portion 5.

The shoulder support portion 61 is located at the center of the top surface 2a in the second direction D2. The shoulder support portion 61 is recessed from the top surface 2a toward the bottom surface 2b. The size of the shoulder support portion 61 is set to a size that allows the user's shoulder to fit within the shoulder support portion 61. For example, the shape of the shoulder support portion 61 is set to a shape that easily accommodates the user's shoulder. In this embodiment, the contour of the shoulder support portion 61 is smoothly connected to the contour of the buttock support portion 5. The shoulder support portion 61 may overlap with a part of the second portion 3 in a plan view. The shoulder support portion 61 is located at a position where the user's shoulder is likely to be placed when the user is sleeping on his/her side and placing his/her head on the second portion 3. The shoulder support portion 61 may overlap with a part of the head support portion 8 in a plan view.

The arm support portion 62 extends from the shoulder support portion 61 toward each of a pair of side ends 2e of the top surface 2a. The arm support portion 62 is a groove provided in the top surface 2a. In this embodiment, a part of the arm support portion 62 overlaps with the buttocks support portion 5 in a plan view. The arm support portion 62 is connected to the shoulder support portion 61 via the buttocks support portion 5. The arm support portion 62 extends obliquely with respect to both the first direction D1 and the second direction D2. The pair of arm support portions 62 are arranged to form a V shape. The pair of arm support portions 62 extend so as to move away from each other as they move away from the second portion 3. In this embodiment, the contour of the arm support portion 62 is smoothly connected to the contour of the buttocks support portion 5.

The first part 2 is provided with a support portion 2g on which the hands of a user U lying on his/her side can be placed. The support portion 2g is arranged to sandwich the second part 3 in the second direction D2. For example, the first part 2 has a pair of support portions 2g. The pair of support portions 2g are arranged to be aligned along the second direction D2. The first part 2 having the support portions 2g can gently support the hands of a user U lying on his/her side (see FIG. 9).

As shown in FIG. 2, in a plan view, the pair of support portions 2g are arranged to sandwich the second portion 3. The support portions 2g are arranged on one side and the other side of the second direction D2 when viewed from the second portion 3, so that the user U can place his/her hands on the support portions 2g when he/she is lying on his/her side facing to the right, and when he/she is lying on his/her side facing to the left. For example, the support portions 2g are flat. A protrusion extending along the inclined portion 2f is formed between the inclined portion 2f and the support portions 2g, and the support portions 2g extend from the protrusion to the rear end portion 2d of the first portion 2.

Next, the second portion 3 will be described in detail with reference to Figures 5, 6, and 7. Figure 5 is a side view of the cushion body 1. Figure 6 is a front view of the cushion body 1. Figure 7 is a rear view of the cushion body 1. The second portion 3 extends from the rear end 2d of the first portion 2 in the first direction D1 along the third direction D3. For example, the second portion 3 is located at the center of the first portion 2 in the second direction D2. The second portion 3 has a rear surface 3a extending upward from the rear end 2h of the bottom surface 2b, and a front surface 3b located opposite the rear surface 3a.

The front surface 3b is formed with a second back support section 7 that supports the back of a seated user, and a head support section 8 that supports the head of a user who is sleeping on his/her back or side. For example, the second back support section 7 is located diagonally below the head support section 8. The head support section 8 is located diagonally above and diagonally behind the second back support section 7 as seen from the seated user. The second back support section 7 and the head support section 8 may also be arranged to be aligned along the third direction D3. More specifically, the second back support section 7 is connected to the first section 2, and the head support section 8 is connected to a section of the second back support section 7 on the opposite side to the first section 2.

The second back support section 7 has a central section 71 located in the center of the second direction D2 of the second back support section 7, and a pair of side sections 72 arranged to sandwich the central section 71 along the second direction D2. The central section 71 is recessed more toward the inside of the second part 3 than the side sections 72. For example, the shape of the central section 71 is shaped to match the shape of the user's back. The central section 71 supports the center of the back of a seated user. The side sections 72 support the sides of the back of a seated user. The side sections 72 are smoothly connected to the inclined sections 2f located below it.

The second back support portion 7 has a first constricted portion 73 that is recessed so that the length of the second portion 3 in the first direction D1 becomes smaller (so that the second portion 3 becomes thinner). The first constricted portion 73 is curved toward the inside of the second portion 3. The first constricted portion 73 may be formed over the entire area of the second portion 3 in the second direction D2.

The head support part 8 is formed, for example, over the entire area of the second part 3 in the second direction D2. The head support part 8 is curved toward the inside of the second part 3 when viewed from the second direction D2. The shape of the head support part 8 is, for example, a shape that conforms to the shape of the head of a user sleeping on his/her back or side. The head support part 8 has a concave shape that is recessed downward. The head support part 8 and the central part 71 are smoothly connected, and the head support part 8 is inclined with respect to the central part 71. Therefore, when a user sleeping on his/her back places his/her head on the head support part 8, the user's cervical vertebrae are supported by the central part 71.

The rear surface 3a has a middle portion 31 that bulges out so that the length of the second portion 3 in the first direction D1 is large, a second constricted portion 32 that is recessed so that the length of the second portion 3 in the first direction D1 is small, and a straight portion 33 that connects the bottom surface 2b and the second constricted portion 32 to each other. The middle portion 31, the second constricted portion 32, and the straight portion 33 are arranged to be aligned along the third direction D3. The middle portion 31 is located above the second constricted portion 32, and the second constricted portion 32 is located above the straight portion 33.

The second constricted portion 32 curves toward the inside of the second portion 3. That is, at the second constricted portion 32, the second portion 3 is recessed in the first direction D1 (forward). The second constricted portion 32 is disposed at a position closer (lower) to the first portion 2 than the first constricted portion 73. As shown in FIG. 7, the second constricted portion 32 is formed over the entire area of the second portion 3 in the second direction D2. The straight portion 33 is inclined so that the further it is from the bottom surface 2b, the further it is from the second portion 3.

Next, the effects obtained from the cushion body 1 will be explained. In the cushion body 1, when the user U is seated, the buttocks of the user U are supported by the buttocks support portion 5, and the back of the user U is supported by the second back support portion 7. Furthermore, the cushion body 1 is capable of gently supporting the body of the user U even when the user U lies down on the cushion body 1.

The effects of the cushion body 1 when the user U lies down on the cushion body 1 will be described with reference to Figs. 8 and 9. Fig. 8 is a side view of the cushion body 1 and the user U lying on his back on the cushion body 1. Fig. 9 is a side view of the cushion body 1 and the user U lying on his side on the cushion body 1.

As shown in FIG. 8, when the user U is lying on his/her back, the first back support section 4 supports the user U's back, and the head support section 8 supports the back of the user U's head. Therefore, the first back support section 4 and the head support section 8 can gently support the back and head of the user U lying on his/her back, respectively, so that the user U can maintain a good posture when lying on his/her back.

As shown in FIG. 9, when the user U is lying on his/her side, the first back support section 4 supports the user U's waist and sides, while the head support section 8 supports the side of the user U's head. Therefore, the first back support section 4 and the head support section 8 can gently support the user U's waist, sides, and head when lying on his/her side, respectively, so that the user U can maintain a good posture when lying on his/her side.

The first part 2 and the second part 3 are made of a flexible material. The flexible material is a material that maintains its shape appropriately even when a load is applied, and deforms to fit the lines of the user's body. Therefore, the shape changes to accommodate the posture of the user U. Specifically, when the back of the user U is placed on the first back support part 4, the first back support part 4 deforms appropriately to fit the shape of the back of the user U. When the head of the user U is placed on the head support part 8, the head support part 8 deforms appropriately to fit the shape of the head of the user U. Since the second part 3 is integrally molded with the first part 2, the position of the second part 3 relative to the first part 2 is unlikely to change significantly. Therefore, when sitting, the buttocks are supported by the buttocks support part 5 formed on the first part 2, and the back is supported by the second back support part 7 formed on the second part 3, so that a good posture can be maintained when sitting.

As described above, when the user U lies down, the first back support section 4 formed in the first section 2 supports the back, waist or sides, while the head support section 8 formed in the second section 3 supports the head, so that the user U can maintain a good posture when lying down. Furthermore, when lying face down, the user U can maintain a good posture by, for example, placing the abdomen on the first back support section 4 and the chin on the head support section 8. Therefore, the user U can maintain a good posture both when sitting and when lying down, and the user U can maintain a good posture when the cushion body 1 is used for any of the four purposes.

As shown in FIG. 4, the first back support portion 4 is inclined with respect to the bottom surface 2b, and the angle θ, which is the inclination angle of the tangent L passing through the top 4a of the first back support portion 4 with respect to the bottom surface 2b, is 20° or more and 40° or less. Since the angle θ is 20° or more and 40° or less, the first back support portion 4 is inclined with respect to the bottom surface so as to rise as it approaches the second portion 3.

When the angle θ is 20° or more, the angle of the body when lying on the cushion body can be tilted appropriately. When the angle θ is 40° or less, the body can be prevented from tilting too much. When the angle θ is 20° or more and 40° or less, the upper body of the user U tilts so as to extend diagonally upward toward the head relative to the bottom surface 2b, as shown in Figures 8 and 9. When the angle θ is 20° or more and 40° or less, the upper body of the user U tilts at about 30° relative to the bottom surface 2b. This makes it easier for the head of the user U to be positioned on the head support part 8, and the inclination of the user U's body when sleeping can be brought closer to an appropriate angle, so that the user U's posture can be maintained in a good state.

In addition, by tilting the upper body of the user U toward the bottom surface 2b, the esophagus of the user U is positioned higher than the stomach and intestines, thereby suppressing reflux esophagitis.

As shown in FIG. 6, the first portion 2 has a humerus support portion 6, which has a shoulder support portion 61 and an arm support portion 62. The shoulder support portion 61 is located in the center of the top surface 2a in the second direction D2, so that the shoulder of the user U who is sleeping on his/her side can be easily placed on the shoulder support portion 61, and the shoulder can be more effectively supported by the shoulder support portion 61. The arm support portion 62 extends toward the end of the top surface 2a in the second direction D2, so that the arm of the user U is easily placed on the arm support portion 62 with the shoulder supported by the shoulder support portion 61, and the arm can be more effectively supported by the arm support portion 62. As a result, the shoulder of the user U who is sleeping on his/her side can be supported by the shoulder support portion 61 and the arm can be supported by the arm support portion 62, so that the user's posture when sleeping on his/her side can be maintained in a good state.

The first portion 2 has a pair of arm support parts 62 aligned along the second direction D2. In this case, regardless of whether the user U places his/her right or left shoulder on the shoulder support parts 61, the arm extending from the shoulder in contact with the shoulder support parts 61 can be supported by one of the pair of arm support parts 62 extending to the left or right.

The hip support section 5 has a pair of ischial support sections 51. When the user is seated on the hip support section 5, the user's ischial bones are supported by the ischial support sections 51. This reduces the burden on the user's ischial bones.

As shown in FIG. 5, the second back support section 7 has a first constricted section 73. For example, when a user U who sleeps on his/her back or side places his/her head on the head support section 8, a load is applied to the second section 3 in the third direction D3. As shown in FIG. 8, when the load is applied, the second section 3 is easily bent via the first constricted section 73. Therefore, when the user U applies a load in the third direction D3 to the second section 3, the second section 3 can be appropriately deformed. The moderate deformation of the second section 3 allows the user U to feel softness. In addition, as in this embodiment, the head support section 8 is located above the first constricted section 73, so that when the first constricted section 73 is bent, the position of the head support section 8 is adapted to the height of the user U's head to the extent that the user U feels comfortable.

The rear surface 3a has a second constriction 32 that is recessed so that the length of the second part 3 in the first direction D1 is reduced. For example, when the weight of the back of a seated user is applied to the second back support part 7, or when the weight of the head of a user U lying on his back or side is applied to the head support part 8, a load in the third direction D3 is applied to the second part 3. As shown in Figs. 8 and 9, when this load is applied, the second part 3 is easily bent via the second constriction 32. Therefore, when the user U applies a load in the third direction D3 to the second part 3, the second part 3 can be appropriately deformed. The moderate deformation of the second part 3 allows the user U to feel softness.

Also, as in this embodiment, by positioning the head support part 8 above the second waist part 32, when the second waist part 32 is bent, the position of the head support part 8 adapts to the height of the head of the user U to an extent that the user U feels comfortable. Also, as in this embodiment, by positioning the second back support part 7 above the second waist part 32, when the second waist part 32 is bent, the inclination of the second back support part 7 adapts to the inclination of the back of the user U to an extent that the user U feels comfortable.

The above describes an embodiment of the cushion body according to the present disclosure. However, the present invention is not limited to the above-described embodiment, and may be modified or applied to other things without changing the gist of the claims. In other words, the shape, size, material, number and arrangement of each part of the cushion body according to the present disclosure can be modified in various ways without changing the gist of the claims.

The first part 2 may not have a humerus support portion 6. In this case, the first part 2 has only the hip support portion 5 as a recessed portion. The first part 2 may not have a humerus support portion 6, and the hip support portion 5 may not be recessed. In this case, the first part 2 does not have a recessed portion and smoothly rises toward the second part 3.

The buttock support part 5 does not have to have a ischial support part 51. In this case, the buttock support part 5 does not have a recess or a through hole, and is configured with a smoothly curved surface.

The humerus support portion 6 may have one arm support portion 62 and not the other arm support portion 62. The humerus support portion 6 may also have a pair of shoulder support portions 61 aligned in the second direction D2, and may have an arm support portion 62 extending from each of the pair of shoulder support portions 61 toward the end of the top surface 2a in the second direction D2. In this case, two sets of humerus support portions 6 are formed, each set consisting of one shoulder support portion 61 and one arm support portion 62. The two sets of humerus support portions 6 may be spaced apart from each other.

At least one of the first constriction portion 73 and the second constriction portion 32 does not have to be provided.

In the above embodiment, an example was described in which the side fabric that houses the cushion body 1 was made of fabric. However, the side fabric may be made of, for example, a cooling material or polyester, and the material of the side fabric is not particularly limited. Furthermore, an internal space may be formed between the cushion body 1 and the side fabric, and beads or polyester batting may be housed in the internal space.

DESCRIPTION OF SYMBOLS 1... Cushion body, 2... First part, 2a... Top surface, 2b... Bottom surface, 2c... Front end, 2d... Rear end, 2e... Side end, 2f... Inclined part, 2g... Placement part, 2h... Posterior end portion, 3... Second portion, 3a... Rear surface, 3b... Front surface, 4... First back support portion, 4a... Top portion, 5... Buttock support portion, 6... Humerus support portion, 7... Second back support portion , 8...Head support part, 31...Middle abdomen, 32...Second constriction part, 33...Straight line part, 51...Ichial bone support part, 51b...Through hole, 51c...Slope surface, 51d...First slope surface, 51f... Second inclined surface, 61...Shoulder support part, 62...Arm support part, 63...Curved part, 71...Central part, 72...Side part, 73...First constriction part, L...Tangential line, U...User, θ …angle.

Claims (7)

a first portion extending in both a first direction and a second direction intersecting the first direction and having a thickness in a third direction intersecting both the first direction and the second direction;
a second portion that is integrally molded with the first portion and extends in the third direction from an end of the first portion in the first direction;
Equipped with
The first portion and the second portion are made of a flexible material,
The first portion is
A top surface on which a buttocks support portion for supporting the buttocks of a user and a first back support portion for supporting the back of a user are formed;
A bottom surface located opposite the top surface;
having
The second portion is
a rear surface extending in the third direction from an end of the bottom surface in the first direction;
a front surface opposite the rear surface;
having
The front surface is provided with a second back support portion for supporting the user's back and a head support portion for supporting the user's head.
Cushion body. The first back support portion is inclined with respect to the bottom surface,
The cushion body according to claim 1 , wherein an inclination angle of a tangent line passing through the top of the first back support portion with respect to the bottom surface is greater than or equal to 20° and less than or equal to 40°. The first portion has a humerus support portion on the top surface for supporting the humerus of a user who is lying on his/her side,
The humeral support portion is
A shoulder support portion located at a center of the top surface in the second direction;
3. The cushion body according to claim 1, further comprising: an arm support portion extending from the shoulder support portion toward an end portion in the second direction on the top surface. The cushion body according to claim 3, wherein the first portion has a pair of the arm support portions aligned along the second direction. The cushion body according to claim 1 or 2, wherein the buttocks support portion is recessed from the top surface toward the bottom surface and has a pair of ischial support portions aligned along the second direction. The cushion body according to claim 1 or 2, wherein the second back support portion has a first constricted portion that is recessed so that the length of the second portion in the first direction is reduced. The cushion body according to claim 1 or 2, wherein the rear surface has a second constricted portion that is recessed so that the length of the second portion in the first direction is reduced.

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