CN117794425A - Buffer body - Google Patents

Abstract

The buffer body according to one embodiment of the present invention has a long side extending in the 1 st direction and a short side extending in the 2 nd direction intersecting the 1 st direction, and has a front surface facing vertically upward and a rear surface facing vertically downward. The buffer body has: a plurality of protruding portions arranged in a lattice shape in the front face so as to be arranged along the 1 st direction and the 2 nd direction, respectively; a 1 st front side slit extending in the 1 st direction between two convex portions arranged along the 2 nd direction; and a 2 nd front side slit extending in the 2 nd direction between two convex portions arranged along the 1 st direction. The buffer body has: a plurality of convex groups formed by a plurality of convex parts surrounded by two 1 st front side slits arranged along the 2 nd direction and two 2 nd front side slits arranged along the 1 st direction. The depth of the 2 nd front slit is equal to or less than the depth of the 1 st front slit.

Description

Buffer body

Technical Field

The present invention relates to a cushion body (cushionbody).

The present application claims priority based on japanese application No. 2021-133944 at 2021, 8, and 19, and refers to all the contents described in the above japanese application.

Background

As a cushioning material, various products have been known. JP-A2002-306885 discloses a cushion body in which a front-side elastic foam and a back-side elastic foam are integrally formed. The buffer body has a concave-convex shape with a protrusion formed on the front side and a planar shape formed on the back side.

The front side elastic foam body has a plurality of 1 st plate-like bodies facing the front side. The back side elastic foam body has a plurality of 2 nd plate-like bodies facing the back side. The 1 st plate-like body has three rows of projections arranged in a lateral direction of the buffer body in a plan view. A gap extending in the vertical direction of the cushioning body in a plan view is formed between the two 1 st plate-like bodies arranged in the horizontal direction of the cushioning body in a plan view. The innermost part of the gap formed in the front side elastic foam body is set as a conduit part having a diameter larger than the width of the gap.

A plurality of 2 nd plate-like bodies are arranged along the vertical direction of the buffer body in a plan view. A gap extending in the lateral direction of the buffer body in plan view is formed between the two 2 nd plate-like bodies arranged in the vertical direction in plan view. The innermost portion of the gap formed in the back surface side elastic foam body is set to have a larger diameter than the width of the gap as in the above.

The cushion body has a plurality of gaps extending in a vertical direction of the cushion body in a plan view on a front side and a plurality of gaps extending in a lateral direction of the cushion body in a plan view on a rear side. The front-side gap and the back-side gap intersect with each other. By providing the gaps crossing each other on the front surface side and the rear surface side in this manner, the air permeability and the cushioning property can be improved.

Patent literature

Patent document 1: japanese patent laid-open No. 2002-306885

Disclosure of Invention

The cushion body includes a plurality of gaps extending in a vertical direction of the cushion body in a plan view on a front side and a plurality of gaps extending in a lateral direction of the cushion body in a plan view on a rear side. However, the front side of the cushion body is a portion to carry the body of the user or the like, and further body pressure dispersion is required.

It is known that the body pressure to the cushion body in the supine position and the body pressure to the cushion body in the lateral position are different from each other. However, in the above-described buffer body, only a plurality of gaps extending in the up-down direction in a plan view are formed on the front side. Therefore, there is room for improvement in terms of body pressure dispersion and turning-over properties corresponding to both supine and lateral situations. Therefore, there is a need to develop a cushion body that has higher versatility to be suitable for more users while improving body pressure dispersion and turn-over properties.

The invention aims to provide a buffer body with high body pressure dispersibility, turning-over property and universality.

The buffer body according to one embodiment of the present invention has (1) a long side extending in the 1 st direction and a short side extending in the 2 nd direction intersecting the 1 st direction, and has a front surface facing vertically upward and a rear surface facing vertically downward. The buffer body has: a plurality of protruding portions, a 1 st front side slit, and a 2 nd front side slit, the plurality of protruding portions being arranged in a lattice shape in the front side so as to be aligned along the 1 st direction and the 2 nd direction, respectively; the 1 st front slit extends in the 1 st direction between two convex parts arranged along the 2 nd direction; the 2 nd front slit extends in the 2 nd direction between two convex portions arranged along the 1 st direction. The buffer body has a plurality of protruding portions, and is configured by a plurality of protruding portions surrounded by two 1 st front side slits arranged along the 2 nd direction and two 2 nd front side slits arranged along the 1 st direction. The depth of the 2 nd front slit is equal to or less than the depth of the 1 st front slit.

The buffer body has a plurality of protrusions arranged in a lattice shape on the front surface so as to be aligned along the 1 st and 2 nd directions, respectively. A plurality of 1 st front side slits extending in the 1 st direction and a plurality of 2 nd front side slits extending in the 2 nd direction are formed in the front side. A protrusion group composed of a plurality of protrusions is provided in a region surrounded by two 1 st front slits arranged along the 2 nd direction and two 2 nd front slits arranged along the 1 st direction. The buffer body includes a plurality of convex portions formed by a plurality of convex portions. Since the convex portions are provided in the region surrounded by the 1 st front slit and the 2 nd front slit, the entire cushion body can be deformed in accordance with the convex portions when the body of the user is carried on the front surface. That is, only the convex portion group to which the body pressure is applied in the cushion body may be deformed. The cushion body can be deformed along the body of the user, and the contact area of the body with respect to the cushion body can be increased, so that the body pressure dispersibility can be improved. The depth of the 2 nd front slit is equal to or less than the depth of the 1 st front slit. Since the depth of the 2 nd front slit extending in the 2 nd direction is equal to or less than the depth of the 1 st front slit extending in the 1 st direction, the body pressure dispersion and turning-over property can be improved for both supine and lateral situations. As a result, versatility can be improved so as to be adaptable to more users.

(2) In the above (1), the cushion body may have a lower layer constituting the back surface, and the lower layer may be made of a harder material than the layers other than the lower layer. In this case, the body of the user can be more firmly supported by the lower layer, and the higher pressure from the shoulders when the user lies on his side can be dispersed by the lower layer. Therefore, the sleeping posture of the user can be maintained by the lower layer, and the sleeping comfort in the lateral lying can be further improved.

(3) In the above (2), the lower layer may be made of a lighter material than the layers other than the lower layer. In this case, since the lower layer is made of a harder and lighter material than the other layers, the entire buffer body can be made lighter.

(4) In any one of the above (1) to (3), the cushion body may have an upper layer including a top portion of the convex portion, and the upper layer may be made of a material having higher elasticity than a layer other than the upper layer. In this case, since the upper layer is made of a highly elastic material, the touch feeling when the user contacts the front surface of the cushion body can be further improved.

(5) The method according to any one of (1) to (4), wherein at least one of the number of the convex portions arranged in the 1 st direction in the convex portion group and the number of the convex portions arranged in the 2 nd direction in the convex portion group is 3 or more. In this case, 3 or more protrusions arranged in the 1 st direction or 3 or more protrusions arranged in the 2 nd direction may be depressed simultaneously by body pressure.

According to the present invention, a cushioning material having high body pressure dispersibility, turning-over property and versatility can be provided.

Drawings

Fig. 1 is a perspective view showing a buffer according to an embodiment.

Fig. 2 is an enlarged perspective view of a part of the buffer body of fig. 1.

Fig. 3 is a plan view schematically showing the front surface of the buffer body of fig. 1.

Fig. 4 is a bottom view schematically showing the back surface of the buffer body of fig. 1.

Fig. 5 is a side view showing a layer structure of the buffer body of fig. 1 as viewed from the 2 nd direction.

Fig. 6 is a side view showing a layer structure of the buffer body of fig. 1 as viewed from the 1 st direction.

Fig. 7 (a) is a graph showing measured data of body pressure of the buffer according to the comparative example in the supine position. (b) To show the measured data of the body pressure of the buffer body in the supine position according to the example.

Fig. 8 (a) is a graph showing actual measurement data of body pressure when the cushion body according to the comparative example is lying on its side. (b) To show the actual measurement data of the body pressure of the cushion body according to the example, the cushion body was used for lateral lying.

Fig. 9 (a) is a diagram showing actual measurement data of the shape of a body lying on a cushion body according to a comparative example. (b) To show the measured data of the shape of the body lying on the buffer body according to the embodiment.

Fig. 10 is a graph showing experimental results for verifying the sagging degree of the buffer body according to the examples and comparative examples.

Fig. 11 (a), (b) and (c) are graphs showing the results of ball rotation tests performed on the shock absorbers according to examples and comparative examples.

Detailed Description

Hereinafter, embodiments of the cushion body according to the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and repetitive description thereof will be omitted as appropriate. For ease of understanding, some of the drawings may be simplified or exaggerated, and the dimensional proportions and the like are not limited to those shown in the drawings.

Fig. 1 is a perspective view showing a cushioning material 1 according to the present embodiment. As shown in fig. 1, the buffer body 1 has a rectangular shape having a plurality of long sides 1b extending in the 1 st direction D1 and a plurality of short sides 1c extending in the 2 nd direction D2 intersecting the 1 st direction D1. The cushioning material 1 has a thickness in a 3 rd direction D3 intersecting with both the 1 st direction D1 and the 2 nd direction D2.

The 1 st direction D1 corresponds to the longitudinal direction of the cushion body 1, and the 2 nd direction D2 corresponds to the width direction of the cushion body 1. The 3 rd direction D3 corresponds to the height direction (thickness direction) of the cushioning body 1. The 1 st direction D1, the 2 nd direction D2 and the 3 rd direction D3 are, for example, orthogonal to each other. As an example, the cushion body 1 is a core material of a mattress. For example, the cushion body 1 is accommodated in a bed cover for preventing contamination.

The cushion body 1 is in contact with the back of the user, for example, as a cushion. The cushion body 1 is used as a cushion pad or bedding in contact with the body of a user, and is used to improve the cushioning property and to improve sitting comfort and sleeping comfort. The entire cushioning material 1 is made of a material having high flexibility.

Therefore, when the body of the user is carried on the cushion body 1, the cushion body 1 deforms according to the load of the body. For example, the cushion body 1 is made of urethane foam (urethane foam). The buffer body 1 has a front surface 2 facing vertically upward and a rear surface 3 facing vertically downward.

The cushion body 1 includes a plurality of protruding portions 4 formed on the front surface 2. The plurality of convex portions 4 are formed to be aligned along the 1 st direction D1 and to be aligned along the 2 nd direction D2. The plurality of projections 4 are arranged in a lattice shape in the front face 2. The convex portion 4 has, for example, a square shape when viewed from the 3 rd direction D3 (in plan view).

The length of one side of the protruding portion 4 is, for example, 2cm or more and 5cm or less (for example, 3.0cm or more and 3.5cm or less) when viewed from the 3 rd direction D3. The portion between the pair of projections 4 is provided as a recess 9 recessed relative to the pair of projections 4. The cushion body 1 has a plurality of concave portions 9, and the plurality of concave portions 9 are arranged in a lattice shape in the front face 2.

Fig. 2 is an enlarged perspective view of a corner portion of the buffer 1. As shown in fig. 1 and 2, the cushion body 1 has a 1 st side surface 5 located at an end portion in the 1 st direction D1, and a 2 nd side surface 6 located at an end portion in the 2 nd direction D2. The cushion body 1 has a pair of 1 st side surfaces 5 and a pair of 2 nd side surfaces 6. The 1 st side surface 5 extends in two directions, namely, the 2 nd direction D2 and the 3 rd direction D3, and the 2 nd side surface 6 extends in two directions, namely, the 1 st direction D1 and the 3 rd direction D3.

The cushion body 1 has a 1 st concave portion 7 formed on the 1 st side surface 5 and a 2 nd concave portion 8 formed on the 2 nd side surface 6. The 1 st concave portion 7 is recessed toward the inside of the cushion body 1 (the center side of the cushion body 1 in plan view) in the 1 st side surface 5, and the 2 nd concave portion 8 is recessed toward the inside of the cushion body 1 in the 2 nd side surface 6. For example, the 1 st concave portion 7 and the 2 nd concave portion 8 are each formed as a curved surface.

The thickness T (length in the 3 rd direction D3) of the cushioning material 1 is, for example, 4cm to 14 cm. In this case, the cushion body 1 exhibits more suitable cushioning properties. However, the thickness T may be 5cm or more, 7cm or more, or 9cm or more, or 13cm or less, 12cm or less, or 10cm or less. The thickness T may be a value other than the above, and is not particularly limited.

Fig. 3 is a plan view of the cushion body 1 showing the front face 2. In fig. 3, the protruding portion 4 is schematically shown. As shown in fig. 2 and 3, the cushion body 1 has a 1 st front slit 11 and a 2 nd front slit 12. The 1 st front slit 11 extends in the 1 st direction D1 between the two convex portions 4 arranged along the 2 nd direction D2. The 2 nd front side slit 12 extends in the 2 nd direction D2 between the two convex portions 4 arranged along the 1 st direction D1.

The cushion body 1 has a plurality of 1 st front side slits 11 and a plurality of 2 nd front side slits 12. The buffer 1 has a plurality of protruding portions G. The convex portion group G is composed of a plurality of convex portions 4 surrounded by two 1 st front side slits 11 aligned along the 2 nd direction D2 and two 2 nd front side slits 12 aligned along the 1 st direction D1. In the convex group G, the convex portions 4 and the concave portions 9 are arranged in a lattice shape.

The plurality of protruding portions G are arranged in a lattice shape on the front surface 2. The plurality of protruding portions G are arranged along the 1 st direction D1 and along the 2 nd direction D2. At least one of the number of projections 4 arranged in the 1 st direction D1 in the projection group G and the number of projections 4 arranged in the 2 nd direction D2 in the projection group G is 3 or more.

Fig. 3 shows an example in which the number of projections 4 arranged in the 1 st direction D1 in the projection group G and the number of projections 4 arranged in the 2 nd direction D2 in the projection group G are 3. In this case, 3×3 (=9) projections 4 are arranged in each projection group G. However, the number of the projections 4 in the projection group G is not limited to the above example, and for example, 3×2 (=6), 4×3 (=12), or 4×4 (=16) projections 4 may be arranged in the projection group G.

Each protruding portion group G is provided inside a rectangular region defined by two 1 st front side slits 11 extending in the 1 st direction D1 and two 2 nd front side slits 12 extending in the 2 nd direction D2. Therefore, the cushion body 1 can be deformed at each of the convex groups G according to the body pressure of the user carried on the front face 2. Therefore, the contact area of the body of the user with the cushion body 1 can be increased, and the body pressure dispersion of the body can be improved.

Fig. 4 is a bottom view of the cushion body 1 showing the back surface 3. As shown in fig. 2 and 4, the cushion body 1 has a rear slit 13. For example, the cushion body 1 has a plurality of back side slits 13. The back side slit 13 extends along the 2 nd direction D2. The plurality of back-side slits 13 are arranged in a line along the 1 st direction D1.

Fig. 5 is a side view of the cushion body 1 as seen from the 2 nd direction D2 (the width direction of the cushion body 1, the lateral direction of the cushion body 1 in a plan view). Fig. 6 is a side view of the cushion body 1 when viewed from the 1 st direction D1 (the longitudinal direction of the cushion body 1, the vertical direction of the cushion body 1 in a plan view). As shown in fig. 5 and 6, the cushioning material 1 includes an upper layer 21, a 1 st intermediate layer 22, a 2 nd intermediate layer 23, and a lower layer 24. The upper layer 21 includes the top 4b of the protrusion 4. The 1 st intermediate layer 22 is located below the upper layer 21. The 2 nd intermediate layer 23 is located below the 1 st intermediate layer 22. The lower layer 24 constitutes the back surface 3.

The cushioning material 1 has a four-layer structure including an upper layer 21, a 1 st intermediate layer 22, a 2 nd intermediate layer 23, and a lower layer 24. For example, the material of the upper layer 21 is different from the material of the layers (the 1 st intermediate layer 22, the 2 nd intermediate layer 23, and the lower layer 24) other than the upper layer 21. The material of the lower layer 24 is different from the material of the layers (the upper layer 21, the 1 st intermediate layer 22, and the 2 nd intermediate layer 23) other than the lower layer 24. The material of the 1 st intermediate layer 22 may be the same as or different from the material of the 2 nd intermediate layer 23. The 1 st intermediate layer 22 and the 2 nd intermediate layer 23 are made of, for example, foam urethane (polyurethane foam).

The upper layer 21 is a layer including the top 4b of the convex portion 4. For example, the shape of the upper layer 21 (in plan view) as viewed along the 3 rd direction D3 is a rectangular shape (square, for example). The shape of the upper layer 21 when viewed along the 1 st direction D1 or the 2 nd direction D2 is, for example, a curved shape (parabolic or circular arc, as an example). The shape of the upper layer 21 as viewed along the 1 st direction D1 or the 2 nd direction D2 may be an elliptical shape, and is not particularly limited.

The cushioning material 1 has a plurality of upper layers 21, and the plurality of upper layers 21 are arranged along two directions, i.e., a 1 st direction D1 and a 2 nd direction D2. In the buffer 1, the upper layers 21 are arranged in a lattice shape. The upper layer 21 is made of a material having higher elasticity than the layers other than the upper layer 21.

The upper layer 21 is a pressure-receiving layer that receives body pressure of the body of the user. The upper layer 21 is made of, for example, a highly elastic material. As an example, the upper layer 21 is made of polyurethane foam (high resilience foam or high elastic foam) having high resilience (restoration). For example, the rebound resilience of the upper layer 21 is 45% or more. However, the rebound resilience of the upper layer 21 is more preferably 50% or more or 55% or more. The upper layer 21 is made of a material having higher rebound elasticity (high rebound) than the layers other than the upper layer 21. The upper layer 21 may also be composed of Somnifoam (registered trademark). The hardness of the upper layer 21 is, for example, 100N or more and 210N or less (150N, as an example). The upper layer 21 has a 40% hardness of, for example, 80N to 200N, more preferably 100N to 180N.

The upper layer 21 may be made of a softer material than the layers other than the upper layer 21. The upper layer 21 may also be composed of film-free (film less) polyurethane. In this case, the air permeability in the upper layer 21 can be improved. However, from the viewpoint of reducing odor, the upper layer 21 made of a highly elastic material is more advantageous than the upper layer 21 made of a film-free polyurethane. Further, the upper layer 21 gives a good touch feeling.

The 1 st intermediate layer 22 is a layer located below the upper layer 21. The 1 st intermediate layer 22 is a dispersion layer that disperses the body pressure of the user. For example, the 1 st intermediate layer 22 has a 40% hardness of 160N or more and 330N or less. However, the hardness of the 1 st intermediate layer 22 may be 190N or more and 240N or more and may be 250N or less and 280N or less. The rebound resilience of the 1 st intermediate layer 22 is, for example, 35% or more. The rebound resilience of the 1 st intermediate layer 22 is more preferably 45% or more. However, the hardness and rebound resilience of the 1 st intermediate layer 22 are not limited to the above examples. The 1 st intermediate layer 22 has a recess 9, a 1 st front slit 11, and a 2 nd front slit 12. The 1 st intermediate layer 22 has, in addition to the recess 9, a 1 st front side slit 11 extending in the 1 st direction D1, and a 2 nd front side slit 12 extending in the 2 nd direction D2.

The buffer body 1 includes a plurality of 1 st intermediate layers 22, and a convex group G is formed on an upper portion of each 1 st intermediate layer 22. The position of the 1 st intermediate layer 22 in plan view is the same as the position of the protruding portion group G in plan view. The 1 st intermediate layer 22 is arranged in a lattice shape in the buffer body 1 so as to be aligned along the 1 st direction D1 and the 2 nd direction D2, respectively, as in the convex portion group G. Therefore, the plurality of×a plurality (for example, 3×3) of projections 4 (projection group G) are deformed independently. As a result, the body pressure of the body can be dispersed more effectively in each of the convex groups G.

The depth H1 from the top 4b of the convex portion 4 to the bottom of the concave portion 9 is shallower than the depth H2 from the top 4b to the bottom of the 1 st front side slit 11 and the depth H3 from the top 4b to the bottom of the 2 nd front side slit 12. The depth H3 of the 2 nd front slit 12 is equal to or less than the depth H2 of the 1 st front slit 11.

The concave portion 9 is formed in an arc shape between the lower ends of the pair of convex portions 4, for example. The 1 st front slit 11 has a 1 st portion 11b and an expansion portion 11c. The 1 st portion 11b extends in a straight line in the 3 rd direction D3. The expansion portion 11c expands such that the width of the 1 st front slit 11 becomes wider from the lower end of the 1 st portion 11 b. The expansion portion 11c is curved in an arc shape, for example. The expansion portion 11c can further easily locally deform the protruding portion group G.

The 2 nd front slit 12 has, for example, the 1 st portion 12b extending in a straight line in the 3 rd direction D3 and the expansion portion 12c expanding so that the width of the 2 nd front slit 12 becomes wider from the lower end of the 1 st portion 12b, as in the 1 st front slit 11. As described above, the depth of the 1 st front side slit 11 and the depth of the 2 nd front side slit 12 are not the same as each other. The lower end of the 2 nd front side slit 12 reaches the 1 st intermediate layer 22. The lower end of the 1 st front slit 11 reaches the 2 nd intermediate layer 23 below the 1 st intermediate layer 22.

For example, the hardness of the lower layer 24 may be higher than the hardness of the 1 st intermediate layer 22 and the hardness of the 2 nd intermediate layer 23. The lower layer 24 has a 40% hardness of, for example, 200N to 350N. The lower layer 24 may have a 40% hardness of 230N or more and 260N or more and 320N or less and 290N or less. The rebound resilience of the lower layer 24 is, for example, 20% or more. Among these, the rebound resilience of the lower layer 24 is more preferably 25% or more. However, the values of the hardness and rebound resilience of the lower layer 24 are not limited to the above examples.

The lower layer 24 is a holding layer that holds the upper layer 21, the 1 st intermediate layer 22, and the 2 nd intermediate layer 23. The 2 nd intermediate layer 23 is an adjustment layer for adjusting the functions of the upper layer 21 and the 1 st intermediate layer 22 as the body pressure dispersion layer and the function of the lower layer 24 as the holding layer. The 2 nd intermediate layer 23 and the lower layer 24 are formed with backside slits 13.

The position of the back-side slit 13 in the 1 st direction D1 is different from the position of the 2 nd front-side slit 12 in the 1 st direction D1. The rear side slits 13 and the 2 nd front side slits 12 are alternately arranged along the 1 st direction D1. For example, the rear side slit 13 is provided at the middle portion of the two 2 nd front side slits 12 aligned along the 1 st direction D1.

The back side slit 13 extends from the back surface 3 through the lower layer 24 to the 2 nd intermediate layer 23. The back-side slit 13 has a linear 1 st portion 13b located in the lower layer 24, and an expansion portion 13c that expands so that the width of the back-side slit 13 becomes wider from the upper end of the 1 st portion 13 b. For example, the expansion portion 13c is formed in the 2 nd intermediate layer 23. As an example, the expansion portion 13c is curved in an arc shape.

For example, the lower layer 24 is composed of a harder material than the layers other than the lower layer 24. For example, the lower layer 24 is made of high-hardness polyurethane foam. The lower layer 24 may also be constructed of lighter materials than layers other than the lower layer 24. More specifically, the lower layer 24 may also be constructed of a lightweight polyurethane foam. The lower layer 24 may be made of a material that is lighter in weight and harder than the layers other than the lower layer 24. More specifically, the lower layer 24 may also be constructed of a lightweight high-durometer polyurethane foam. When the lower layer 24 is made of a light polyurethane foam or a light high-hardness polyurethane foam, the cushioning body 1 can be reduced by about 300 to 400g as compared with a case where the lower layer 24 is made of a material other than the light polyurethane foam or the light high-hardness polyurethane foam.

The operational effects obtained from the cushion body 1 according to the present embodiment will be described. The cushion body 1 includes a plurality of protruding portions 4 arranged in a lattice shape in the front surface 2 so as to be aligned along the 1 st direction D1 and the 2 nd direction D2, respectively. A plurality of 1 st front side slits 11 extending in the 1 st direction D1 and a plurality of 2 nd front side slits 12 extending in the 2 nd direction D2 are formed in the front side 2.

A protrusion group G including a plurality of protrusions 4 is provided in a region surrounded by the two 1 st front slits 11 aligned in the 2 nd direction D2 and the two 2 nd front slits 12 aligned in the 1 st direction D1. The cushion body 1 includes a plurality of protruding portions G including a plurality of protruding portions 4. Each of the protruding portions G is provided in a region surrounded by the 1 st front slit 11 and the 2 nd front slit 12. Therefore, when the body of the user is supported on the front surface 2, the entire cushion body 1 can be deformed in accordance with the convex group G.

Only the protruding portion group G to which the body pressure is applied in the cushion body 1 can be deformed. Therefore, the cushion body 1 can be deformed along the body of the user, and the contact area of the body with respect to the cushion body 1 can be increased, so that the body pressure dispersion can be improved. The depth H3 of the 2 nd front slit 12 is equal to or less than the depth H2 of the 1 st front slit 11. In the present embodiment, the depth H3 of the 2 nd front slit 12 is shallower than the depth H2 of the 1 st front slit 11. The depth H3 of the 2 nd front slit 12 extending in the 2 nd direction D2 is equal to or less than the depth H2 of the 1 st front slit 11 extending in the 1 st direction D1. Therefore, the body pressure dispersion and the turning-over property can be improved for both the supine condition and the lateral condition, and the versatility can be improved so as to be suitable for more users.

The cushion body 1 according to the present embodiment has the lower layer 24 constituting the back surface 3, and the lower layer 24 may be made of a harder material than the layers other than the lower layer 24. In this case, the body of the user can be firmly supported by the lower layer 24, and the higher pressure from the shoulders when the user lies on his side can be dispersed by the lower layer 24. Therefore, the sleeping posture of the user can be maintained by the lower layer 24, and the sleeping comfort when lying on the side can be further improved.

In the present embodiment, the lower layer 24 may be made of a lighter material than the layers other than the lower layer 24. In this case, since the lower layer 24 is made of a harder and lighter material than the other layers, the entire cushioning body 1 can be made lighter.

The cushioning material 1 according to the present embodiment has the upper layer 21 including the top portion 4b of the protruding portion 4, and the upper layer 21 may be made of a material having higher elasticity than the layers other than the upper layer 21. In this case, since the upper layer 21 is made of a highly elastic material, the touch feeling when the user contacts the front surface 2 of the cushion body 1 can be further improved.

At least one of the number of projections 4 arranged in the 1 st direction D1 in the projection group G and the number of projections 4 arranged in the 2 nd direction D2 in the projection group G may be 3 or more. In this case, 3 or more protrusions 4 arranged in the 1 st direction D1 or 3 or more protrusions arranged in the 2 nd direction D2 may be depressed simultaneously by the body pressure.

The cushion body 1 includes a plurality of protruding portions 4 arranged in a lattice shape. The cushioning material 1 has an upper layer 21 including the top portion 4b of the protruding portion 4, and a lower layer 24 facing the opposite side of the upper layer 21. The upper layer 21 is made of a material having higher elasticity than the layers other than the upper layer 21. Therefore, the touch feeling when the user contacts the front surface 2 of the cushion body 1 can be improved, and the body pressure dispersion and versatility can be improved.

The lower layer 24 is composed of a harder and lighter material than the layers other than the lower layer 24. Since the lower layer 24 is composed of a harder material than the other layers, the user's body can be firmly supported by the lower layer 24, and the higher pressure from the shoulders when lying on the side can be dispersed by the lower layer 24. Therefore, the sleeping posture of the user can be maintained by the lower layer 24, the turning-over performance can be improved, and the sleeping comfort in the lateral lying state can be improved. Since the lower layer 24 is made of a lighter material than the other layers, the entire cushioning body 1 can be made lighter.

Since experiments were performed on the buffer body 1 according to the example and the buffer body according to the comparative example, the experiments will be described. The cushioning material 1 according to the example is a cushioning material 1 having a 1 st front slit 11 and a 2 nd front slit 12 formed in a 1 st intermediate layer 22, and a high-hardness and lightweight lower layer 24, similar to the cushioning material 1 of the above embodiment. The buffer according to the comparative example is a buffer having only the 1 st front slit 11 extending in the 1 st direction D1 in the 1 st intermediate layer 22 and not having the 2 nd front slit 12.

Fig. 7 a is an experimental result (measured data) showing the body pressure distribution in a state in which the user lies in the buffer body according to the comparative example in the supine position. Fig. 7 b shows the experimental results (measured data) of the body pressure distribution of the buffer body 1 according to the example in which the user lies in the supine position.

In the actual measurement data of fig. 7 (a), 7 (b), and fig. 8 (a) and 8 (b) described later, the left side indicates the head side of the cushion body, the right side indicates the foot side of the cushion body, and the thicker the color, the greater the body pressure applied. As shown in fig. 7 (a) and 7 (b), the cushion body 1 according to the example can disperse the body pressure of the waist more than the cushion body according to the comparative example with respect to the body pressure given in the supine position.

Fig. 8 a shows the experimental results (measured data) of the body pressure distribution in a state in which the user lies on the cushion body according to the comparative example in a side-lying posture. Fig. 8 b shows the results of experiments (measured data) showing the body pressure distribution of the user in a state of lying on his/her side in the cushion body 1 according to the example. As shown in fig. 8 (a) and 8 (b), the cushion body 1 according to the example can disperse a higher body pressure on the shoulders than the cushion body according to the comparative example with respect to the body pressure applied when the user lies on his/her side.

In the buffer body 1 according to the example, a buffer body 1 having a thickness of 9cm and a buffer body 1 having a thickness of 4cm were prepared and each of them was subjected to the above-described experiment. The same results as those in fig. 7 (b) and 8 (b) were obtained in all of these experiments. The same results as those in fig. 7 (b) and 8 (b) were obtained also in the buffer body 1 according to the example, in which the lower layer 24 having high hardness and light weight was removed (the buffer body having the 1 st front slit 11 and the 2 nd front slit 12).

Fig. 9 a is an experimental result (measured data) showing a result of measuring the sleeping posture of the user in the buffer body according to the comparative example. Fig. 9 b shows experimental results (measured data) showing the results of measuring the sleeping posture of the user in the buffer body 1 according to the example. The sleeping posture of the user is measured using the shape measuring device for bedding. Spinetiter (registered trademark) is used as a shape measuring device for bedding.

As shown in fig. 9 (a) and 9 (b), it is clear that the cushioning body 1 according to the example can reduce the sagging degree X of the buttocks of the user as compared with the cushioning body according to the comparative example. This is considered to be because the cushioning body 1 has the lower layer 24 having high hardness, and therefore the lower layer 24 supports the buttocks more firmly, whereby the sagging degree X can be reduced.

Fig. 10 shows the result (average of the results obtained by measuring three times) obtained by arranging a sheet-like (band-like) bedding shape measuring device so as to extend in the width direction of the cushioning body and measuring the sagging amount of each of the shoulder, upper waist and lower waist of the user when lying on the side. The user (subject) in this experiment was a Kukara man with a height of 176cm and a weight of 90 kg. As bedding shape measuring devices, mattress measuring devices (sheet feeders) are used. As shown in fig. 10, in the buffer body of example 2 having the 1 st front slit 11 and the 2 nd front slit 12, but not having the high-hardness and lightweight lower layer 24, the amount of sagging on the shoulders, on the waist, and under the waist became larger as compared with the buffer body of the comparative example. In contrast, in the buffer body of example 1 having the lower layer 24 of high hardness and light weight, the amount of sagging in the shoulders, waist and waist was smaller than that of the buffer body of the comparative example. Thus, it was found that the cushion body 1 of example 1 was able to further improve the turning-over property of the queen man when lying on his side by reducing the sagging degree by the lower layer 24.

Fig. 11 (a), 11 (b) and 11 (c) show the results of measuring the moment value when the ball is placed on the front surface of the buffer body and is pulled in the 1 st direction D1 and the 2 nd direction D2 to rotate. Fig. 11 (a) shows the moment value when the pressure of the sphere is 35N, fig. 11 (b) shows the moment value when the pressure of the sphere is 88N, and fig. 11 (c) shows the moment value when the pressure of the sphere is 113N. As shown in fig. 11 (a), 11 (b) and 11 (c), it is clear that the damper 1 according to example 1 and the damper 2 according to example 2 have smaller moment values than the damper according to the comparative example. It is also known that the moment value can be reduced especially in the case where the ball moves in the 1 st direction D1 and in the case where the ball pressure is large (113N). Based on the above, it is found that example 1 and example 2 can improve body pressure dispersibility and turning-over property as compared with the comparative example.

The embodiments and examples of the buffer body according to the present invention have been described above. However, the buffer of the present invention is not limited to the above-described embodiment or examples, and may be appropriately modified within the scope of the gist described in the claims. The shape, size, number, material and arrangement of the respective portions of the buffer body are not limited to the above-described embodiment or example, and may be appropriately changed.

For example, in the above embodiment, the cushioning body 1 as the core material of the mattress is described. However, the cushion body of the present invention may be a core material of bedding for laying other than a mattress (mattress) such as a mattress, or a core material of a pillow. The cushion body according to the present invention can be used as a cushion pad, a seat for a vehicle such as an automobile or a train, a seat for a conveyor other than a vehicle such as an airplane, or a seat other than a conveyor such as a chair for nursing. In the above embodiment, the explanation was made with respect to an example in which the cushion body 1 is used to improve the comfort of sleeping. However, the cushioning material of the present invention may also be used to cushion impact or for various applications.

Symbol description

1 … cushioning body, 1b … long side, 1c … short side, 2 … front side, 3 … back side, 4 … convex portion, 4b … top, 5 … st side, 6 … nd side, 7 … st concave portion, 8 … nd concave portion, 9 … concave portion, 11 … st front side slit, 11b … st portion, 11c … expanded portion, 12 … nd front side slit, 12b … st portion, 12c … expanded portion, 13 … back side slit, 13b … st portion, 13c … expanded portion, 21 … upper layer, 22 … st intermediate layer, 23 … nd intermediate layer, 24 … lower layer, D1 … st direction, D2 … nd direction, D3 … nd direction, G … th convex portion.

Claims (5)

1. A cushioning body having a long side extending in a 1 st direction and a short side extending in a 2 nd direction intersecting the 1 st direction, and having a front face facing vertically upward and a rear face facing vertically downward, the cushioning body comprising:

a plurality of protruding portions arranged in a lattice shape in the front surface so as to be aligned along the 1 st direction and the 2 nd direction, respectively;

a 1 st front side slit extending in the 1 st direction between the two convex portions arranged along the 2 nd direction; and

a 2 nd front side slit extending in the 2 nd direction between two of the convex portions arranged along the 1 st direction,

the buffer body has a plurality of protruding parts, the plurality of protruding parts are composed of a plurality of protruding parts surrounded by two 1 st front side slits arranged along the 2 nd direction and two 2 nd front side slits arranged along the 1 st direction,

the depth of the 2 nd front slit is equal to or less than the depth of the 1 st front slit.

2. The buffer body according to claim 1, wherein,

the buffer body has a lower layer constituting the back surface,

the lower layer is composed of a harder material than the layers other than the lower layer.

3. A buffer body as claimed in claim 2, wherein,

the lower layer is composed of a lighter material than the layers other than the lower layer.

4. A buffer body according to claim 1 or 2, wherein,

the buffer body has an upper layer including a top of the convex portion,

the upper layer is made of a material having higher elasticity than the layers other than the upper layer.

5. A buffer body according to claim 1 or 2, wherein,

at least one of the number of the convex portions arranged along the 1 st direction in the convex portion group and the number of the convex portions arranged along the 2 nd direction in the convex portion group is 3 or more.