Pillow cushion material

Abstract

To provide a pillow cushion material having excellent body pressure dispersibility and fittability.SOLUTION: A pillow cushion material has a front surface, and a planar bottom surface. The front surface is formed into an approximately corrugated shape. In the front surface, a plurality of first groove parts extending along a direction orthogonal to a depth direction, and a plurality of second groove parts extending along the depth direction are formed. In the bottom surface, a plurality of third groove parts extending along the direction orthogonal to the depth direction, and a plurality of fourth groove parts extending along the depth direction are formed. The third groove parts are arranged so as to be shifted with respect to the first groove parts. The fourth groove parts are arranged so as to be shifted with respect to the second groove parts. The plurality of first groove parts include a plurality of the first groove parts having depths depending on distances between the front surface and the bottom surface at respective positions where they are arranged. The plurality of third groove parts include a plurality of the third groove parts having depths depending on distances between the front surface and the bottom surface at respective positions where they are arranged.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cushioning material for a pillow.

Background Art

[0002] Conventionally, as a cushioning material for a pillow, a cushioning material made of synthetic resin foam or the like, having uneven shapes or a plurality of grooves formed on its surface to improve body pressure dispersion, is known. For example, Patent Document 1 discloses a cushioning material provided with a plurality of grooves extending in the length direction of the cushioning material and a plurality of grooves extending in the width direction of the cushioning material on the surface of the cushioning material, whereby a plurality of protrusions are provided on the surface of the cushioning material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the cushioning material described in Patent Document 1 may not fit the shape of the S-shaped line from the user's neck to the head, and there is a possibility that sufficient fitness cannot be obtained.

[0005] One aspect of the present invention aims to provide a cushioning material for a pillow having excellent body pressure dispersion and fitness.

Means for Solving the Problems

[0006] One aspect of the present invention is a cushioning material for a pillow having a surface and a flat bottom surface, wherein the surface has protruding portions located at both ends in the depth direction and protruding in a direction perpendicular to the bottom surface, and a recessed portion located at the central portion and formed continuously with the protruding portions, and is formed in a substantially corrugated shape. The surface is formed with a plurality of first groove portions extending along a direction orthogonal to the depth direction, and a plurality of second groove portions extending along the depth direction. The bottom surface is formed with a plurality of third groove portions extending along a direction orthogonal to the depth direction, and a plurality of fourth groove portions extending along the depth direction. The third groove portions are arranged offset in the depth direction with respect to the first groove portions, and the fourth groove portions are arranged offset in a direction orthogonal to the depth direction with respect to the second groove portions. The plurality of first groove portions include a plurality of the first groove portions having a depth corresponding to the distance between the surface and the bottom surface at each arranged position, and the plurality of third groove portions include a plurality of the third groove portions having a depth corresponding to the distance between the surface and the bottom surface at each arranged position.

Advantages of the Invention

[0007] According to one aspect of the present invention, it is possible to provide a cushioning material for a pillow having excellent body pressure dispersion and fitness.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. For ease of understanding of the description, the same reference numerals may be assigned to the same components in each drawing, and redundant descriptions may be omitted. In this specification, a three-dimensional orthogonal coordinate system in three axial directions (X-axis direction, Y-axis direction, Z-axis direction) may be used for the description. In that case, the direction perpendicular to the bottom surface of the pillow cushioning material is defined as the Z-axis direction, and on the plane orthogonal to the Z-axis, one of the two mutually perpendicular directions is defined as the X-axis direction, and the other is defined as the Y-axis direction. Also, the +Z-axis direction may be regarded as upward and the -Z-axis direction as downward.

[0010] FIG. 1 is a perspective view of a pillow cushioning material according to an embodiment, FIG. 2 is a side view of a pillow cushioning material according to an embodiment, FIG. 3 is a plan view of a pillow cushioning material according to an embodiment, and FIG. 4 is a bottom view of a pillow cushioning material according to an embodiment. As shown in FIGS. 1 to 4, the pillow cushioning material 1 has a surface 2 and a planar bottom surface 3. The surface 2 is the surface that receives the load by the user's head, and the bottom surface 3 is the surface on the opposite side of the surface 2. The pillow cushioning material 1 may further have a pair of side surfaces 4 extending in the vertical direction (+Z-axis direction) from the bottom surface 3.

[0011] The shape of the pillow cushioning material 1 can be, for example, rectangular, circular, elliptical, etc. in plan view. When the shape of the pillow cushioning material 1 is rectangular in plan view, when the pillow cushioning material 1 is used, the longitudinal direction can be the direction of the user's shoulder width.

[0012] Examples of the material constituting the pillow cushioning material 1 include elastic foams such as soft polyurethane, polyethylene, polypropylene, polyvinyl chloride, and ethylene vinyl acetate copolymer.

[0013] The surface 2 has a protruding portion 21 located at both ends in the depth direction (Y-axis direction) and protruding perpendicularly to the bottom surface 3, and a recessed portion 22 located at the central portion and formed continuously with the protruding portion 21, and is formed in a substantially corrugated shape. That is, the surface 2 is composed of a curved surface and has a wave shape when viewed from the side surface 4. The protruding portion 21 supports the user's neck, and the recessed portion 22 supports the user's head.

[0014] Preferably, the height of the protruding portion 21 on one end side is greater than the height of the protruding portion 21 on the other end side. Thereby, the user can select the protruding portion 21 with a desired height, and the pillow cushioning material 1 can improve the fitness in order to support the neck according to the user's body type.

[0015] As shown in FIGS. 1 and 3, a plurality of first groove portions 23 extending along a direction (X-axis direction) orthogonal to the depth direction are formed on the surface 2, and a plurality of second groove portions 24 extending along the Y-axis direction are formed. The plurality of first groove portions 23 and the plurality of second groove portions 24 intersect with each other. That is, the pillow cushioning material 1 has a plurality of blocks surrounded by the first groove portions 23 and the second groove portions 24 on the surface 2. The plurality of first groove portions 23 may penetrate through both side surfaces 4, and the plurality of second groove portions 24 may penetrate through the surface 2 in the Y-axis direction.

[0016] The first groove portion 23 and the second groove portion 24 each have opening portions 231 and 241 opening to the surface 2. The depth directions of the first groove portion 23 and the second groove portion 24 may be perpendicular to the bottom surface 3. The width (length in the Y-axis direction) of the first groove portion 23 and the width (length in the X-axis direction) of the second groove portion 24 may be constant in their respective depth directions (-Z-axis direction).

[0017] On the bottom surface 3, as shown in FIGS. 1 and 4, a plurality of third groove portions 31 extending along the X-axis direction and a plurality of fourth groove portions 32 extending along the Y-axis direction are formed. The plurality of third groove portions 31 and the plurality of fourth groove portions 32 intersect with each other. That is, the pillow cushion material 1 has a plurality of blocks surrounded by the third groove portions 31 and the fourth groove portions 32 on the bottom surface 3 side. The plurality of third groove portions 31 may penetrate both side surfaces 4, and the plurality of fourth groove portions 32 may penetrate the surface 2 in the Y-axis direction.

[0018] The third groove portion 31 is arranged to be shifted in the depth direction with respect to the first groove portion 23, and the fourth groove portion 32 is arranged to be shifted in a direction orthogonal to the depth direction with respect to the second groove portion 24. Further, as shown in FIG. 2, the plurality of first groove portions 23 include a plurality of first groove portions 23 having depths corresponding to the distances between the surface 2 and the bottom surface 3 at their respective arranged positions, and the plurality of third groove portions 31 include a plurality of third groove portions 31 having depths corresponding to the distances between the surface 2 and the bottom surface 3 at their respective arranged positions. With this configuration, the pillow cushion material 1 fits the shape of the S-shaped line from the user's neck to the head, and at the protruding portion 21 and the recessed portion 22, it sinks moderately toward the bottom surface 3 side according to the load from the user, and supports the user's neck and head in a suitable state, so it has good body pressure dispersion. Therefore, the pillow cushion material 1 has excellent body pressure dispersion and fit.

[0019] Specifically, in a part of the region (one side of the center plane C1 passing through the center in the Y-axis direction (the right side of the paper surface in FIG. 2)), the depth D1 of the first groove portion 23 is larger as the distance L8 between the opening 231 of each first groove portion 23 and the bottom surface 3 is larger, and the depth D2 of the third groove portion 31 is larger as the distance L9 between the opening 311 of each third groove portion 31 and the surface 2 is larger. Here, the depth D1 of the first groove portion 23 means the maximum distance between the bottom of the first groove portion 23 and the opening 231 of the first groove portion 23 when the opening 231 is inclined. The distance L8 means the maximum distance between the opening 231 of the first groove portion 23 and the bottom surface 3 when the opening 231 of the first groove portion 23 is inclined. The distance L9 means the maximum distance between the opening 311 of the third groove portion 31 and the surface 2 because the surface 2 is a curved surface.

[0020] With this configuration, the pillow cushioning material 1 fits the shape of the S-shaped line from the user's neck to the head, and at the protruding portion 21 and the recessed portion 22, it sinks moderately toward the bottom surface 3 side according to the load from the user, and supports the user's neck and head in a suitable state, so it has good body pressure distribution. Therefore, the pillow cushioning material 1 has excellent body pressure distribution and fitness.

[0021] The depth D2 of the plurality of third groove portions 31 may be larger as the distance L9 between the opening 311 of each third groove portion 31 and the surface 2 is larger, except for some of the third groove portions 31. Thereby, the pillow cushioning material 1 can adjust the rigidity of some regions, for example, by making the rigidity of the end portion located on the top of the user's head side relatively large, and has excellent body pressure distribution and fitness.

[0022] In the example shown in FIG. 2, the depth D2 of the plurality of third groove portions 31 located on the other side of the center plane C1 (the left side of the paper surface in FIG. 2) is larger as the distance L9 between the opening 311 of each third groove portion 31 and the surface 2 is larger, except for the third groove portion 31 located on the outermost other side. Also, the height of the protruding portion 21 on the other side of the center plane C1 is smaller than the height of the protruding portion 21 on one side of the center plane C1.

[0023] As shown in FIG. 3, in the Y-axis direction, the interval L1 between the plurality of first groove portions 23 may be constant. The interval L1 between the plurality of first groove portions 23 is preferably smaller than the distance L2 between each of the first groove portions 23 located at both ends and the end of the pillow cushioning material 1 in the Y-axis direction. Here, the interval L1 between the plurality of first groove portions 23 means the shortest distance between the centers of the first groove portions 23 in the Y-axis direction. Also, the distance L2 means the shortest distance between the center of the first groove portion 23 and the end of the pillow cushioning material 1 in the Y-axis direction.

[0024] That is, in the Y-axis direction on both sides of the surface 2, it is preferable that the length in the Y-axis direction of the blocks located in the outer region is greater than the length in the Y-axis direction of the blocks located in the inner region. Thereby, in the Y-axis direction, the rigidity of the inner region can be made smaller than the rigidity of the outer region. For example, the pillow cushioning material 1 may have two types of blocks with different lengths in the Y-axis direction on the surface 2 side. In the Y-axis direction on the surface 2 side, the length in the Y-axis direction of the blocks located in the central region R1 may be constant. In this case, in the Y-axis direction, the length of the central region R1 can be set to be 0.5 times or more and 0.7 times or less the length of the pillow cushioning material 1.

[0025] In the X-axis direction, it is preferable that the distance L3 between the plurality of second groove portions 24 located in the outer region is greater than the distance L3 between the plurality of second groove portions 24 located in the inner region. Here, the distance L3 between the plurality of second groove portions 24 means the shortest distance between the centers of the second groove portions 24 in the X-axis direction. For example, in the X-axis direction, the distance L3 between the plurality of second groove portions 24 may have two levels of intervals. Further, in the X-axis direction, the distance L3 between the plurality of second groove portions 24 located inside may be constant.

[0026] It is preferable that the distance L3 between the plurality of second groove portions 24 is smaller than the distance L4 between each of the second groove portions 24 located at both ends and the end of the pillow cushioning material 1 in the X-axis direction. Here, the distance L4 means the shortest distance between the center of the second groove portion 24 in the X-axis direction and the end of the pillow cushioning material 1.

[0027] That is, in the X-axis direction on both sides of the surface 2, it is preferable that the length of the block located in the outer region in the Y-axis direction is greater than the length of the block located in the inner region in the X-axis direction. Thereby, in the X-axis direction, the rigidity of the inner region can be made smaller than the rigidity of the outer region. For example, the pillow cushion material 1 may have three types of blocks with different lengths in the X-axis direction on the surface 2 side. In the X-axis direction on the surface 2 side, the length of the block located in the central region R2 may be constant. In this case, in the X-axis direction, the length of the central region R2 can be set to be 0.3 times or more and 0.4 times or less the length of the pillow cushion material 1.

[0028] As shown in FIG. 4, the third groove portion 31 and the fourth groove portion 32 each have openings 311 and 321 that open to the bottom surface 3. The depth directions of the third groove portion 31 and the fourth groove portion 32 may be perpendicular to the bottom surface 3. Since the depth directions of the first groove portion 23, the second groove portion 24, the third groove portion 31, and the fourth groove portion 32 are perpendicular to the bottom surface 3, the pillow cushion material 1 has better body pressure dispersion for supporting the user's neck and head in a more suitable state.

[0029] The width (length in the Y-axis direction) of the third groove portion 31 and the width (length in the X-axis direction) of the fourth groove portion 32 may each be constant in the depth direction (+Z-axis direction). Since the widths of the first groove portion 23, the second groove portion 24, the third groove portion 31, and the fourth groove portion 32 are each constant in the depth direction, the pillow cushion material 1 has better body pressure dispersion for supporting the user's neck and head in a more suitable state.

[0030] As shown in FIG. 4, in the Y-axis direction, the distance L5 between the plurality of third groove portions 31 may be constant. Here, the distance L5 between the plurality of third groove portions 31 means the shortest distance between the centers of the plurality of third groove portions 31 in the Y-axis direction. That is, in the Y-axis direction on the bottom surface 3 side, the length of the block in the Y-axis direction may be constant.

[0031] In the X-axis direction, it is preferable that the distance L6 between the plurality of fourth groove portions 32 located in the outer region is larger than the distance L6 between the plurality of fourth groove portions 32 located in the inner region. Here, the distance L6 between the plurality of fourth groove portions 32 means the shortest distance between the centers of the plurality of fourth groove portions 32 in the X-axis direction. For example, the cushioning material 1 for a pillow may have three levels of distances L6 between the plurality of fourth groove portions 32 in the X-axis direction. Further, in the X-axis direction, the distance L6 between the plurality of fourth groove portions 32 located inside may be constant.

[0032] The distance L6 between the plurality of fourth groove portions 32 may be larger than the respective distances L6 between the fourth groove portions 32 located at both ends and the distance L7 between the end of the cushioning material 1 for a pillow in the X-axis direction. Here, the distance L7 means the shortest distance between the center of the fourth groove portion 32 in the Y-axis direction and the end of the cushioning material 1 for a pillow. Also, the distance L6 between the plurality of fourth groove portions 32 located inside may be smaller than the distance L7.

[0033] That is, in the X-axis direction on the bottom surface 3 side, excluding the blocks at both ends, it is preferable that the length in the X-axis direction of the blocks located in the outer region is larger than the length in the X-axis direction of the blocks located in the inner region. Thereby, in the X-axis direction, the rigidity of the inner region can be made smaller than the rigidity of the outer region. For example, the cushioning material 1 for a pillow may have four types of blocks with different lengths in the X-axis direction on the bottom surface 3 side. In the X-axis direction on the bottom surface 3 side, the length of the blocks located in the central region R3 may be constant. In this case, in the X-axis direction, the length of the central region R3 can be set to be 0.3 times or more and 0.4 times or less the length of the cushioning material 1 for a pillow.

[0034] The pillow cushion material 1 may have a lower layer portion 5 including a part of the surface 2 and the bottom surface 3, and an upper layer portion 6 laminated on the lower layer portion 5 and including the surface 2. In this case, the opening portions 231 and 241 of the first groove portion 23 and the second groove portion 24 are formed in the upper layer portion 6, and the opening portions 311 and 321 of the third groove portion 31 and the fourth groove portion 32 are formed in the lower layer portion 5. With this configuration, for example, the material constituting the lower layer portion 5 and the material constituting the upper layer portion 6 can be different materials, and the pillow cushion material 1 can improve the fitness. Note that the hardness of the lower layer portion 5 and the hardness of the upper layer portion 6 may be different or the same.

[0035] When the pillow cushion material 1 has the lower layer portion 5 and the upper layer portion 6, the bottom portions of the first groove portion 23 and the second groove portion 24 may be located in the lower layer portion 5. That is, the first groove portion 23 and the second groove portion 24 may be formed across the boundary between the lower layer portion 5 and the upper layer portion 6.

[0036] FIG. 5 is a side view of another example of the pillow cushion material according to an embodiment. The pillow cushion material 1 may have a cushion member 7 on a flat plate laminated under the bottom surface 3. The number of the cushion members 7 may be 1 or a plurality of two or more. The length of the cushion member 7 in the Y-axis direction and the length in the X-axis direction are the same as the respective lengths of the bottom surface 3 of the pillow cushion material 1. The thickness of the cushion member 7 may be smaller than the minimum value of the distance between the bottom surface 3 and the surface 2 of the pillow cushion material 1. Thereby, the pillow cushion material 1 can finely adjust the height according to the desired height of the user.

[0037] As described above, the embodiments have been described. However, the above embodiments are presented as examples, and the present invention is not limited by the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, replacements, changes, etc. can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Explanation of Signs

[0038] 1 Pillow cushion material 2 Surface 21 Protrusion 22 Depression 23 First groove 24 Second groove 3 Bottom surface 31 Third groove 32 Fourth groove 231, 241, 311, 321 Openings 4 Side surface 5 Lower layer 6 Upper layer 7 Cushion member

Claims

1. A cushion material for a pillow having a surface and a flat bottom surface, wherein the surface has a protruding portion located at both ends in the depth direction and protruding in a direction perpendicular to the bottom surface, and a recessed portion located at the central portion and formed continuously with the protruding portion, and is formed in a substantially corrugated shape, a plurality of first groove portions extending along a direction orthogonal to the depth direction are formed on the surface, and a plurality of second groove portions extending along the depth direction are formed, a plurality of third groove portions extending along a direction orthogonal to the depth direction are formed on the bottom surface, and a plurality of fourth groove portions extending along the depth direction are formed, the third groove portion is arranged offset in the depth direction with respect to the first groove portion, and the fourth groove portion is arranged offset in a direction orthogonal to the depth direction with respect to the second groove portion, the plurality of first groove portions include a plurality of the first groove portions having a depth corresponding to the distance between the surface and the bottom surface at each arranged position, A cushion material for a pillow, wherein the plurality of third groove portions include a plurality of the third groove portions having a depth corresponding to the distance between the surface and the bottom surface at each arranged position.

2. The cushion material for a pillow according to claim 1, wherein the depth directions of the first groove portion, the second groove portion, the third groove portion, and the fourth groove portion are perpendicular to the bottom surface.

3. The cushion material for a pillow according to claim 1, wherein the height of the protruding portion on one end side is larger than the height of the protruding portion on the other end side.

4. The cushion material for a pillow according to claim 1, wherein the widths of the first groove portion, the second groove portion, the third groove portion, and the fourth groove portion are constant in the depth direction.

5. The cushion material for a pillow according to claim 1, wherein, except for some of the third groove portions, the depth of each of the plurality of third groove portions is larger as the distance between the opening of each third groove portion and the surface is larger.

6. It has a lower layer portion including a part of the surface and the bottom surface, and an upper layer portion laminated on the lower layer portion and including the surface, openings of each of the first groove portion and the second groove portion are formed in the upper layer portion, The cushion material for a pillow according to any one of claims 1 to 5, wherein openings of each of the third groove portion and the fourth groove portion are formed in the lower layer portion.

7. The cushion material for a pillow according to claim 6, having a cushion member on a flat plate laminated under the bottom surface.

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