pillow

Abstract

We provide pillows that are less prone to stuffiness. [Solution] The pillow 10 comprises a first cushion 12 having a plurality of first protrusions 14, a second cushion 16 having a plurality of second protrusions 18 with protrusion dimensions different from those of the first protrusions 14, and arranged on top of the first cushion 12 with the surfaces on which the second protrusions 18 protrude facing the surfaces on which the first protrusions 14 protrude, and a gap S formed between the second protrusions 18 arranged between the first protrusions 14 and the first cushion 12.

Description

Technical Field

[0001] This invention relates to a pillow.

Background Art

[0002] Since heat tends to accumulate in a pillow during use, it is prone to becoming stuffy, and it has been proposed to provide a large number of through-holes and grooves in the pillow to improve ventilation (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the pillow of Patent Document 1, it takes time to form a large number of through-holes and grooves.

[0005] In view of the above problems in the prior art, the present invention has been proposed to preferably solve these problems, and an object thereof is to provide a pillow that is difficult to become stuffy.

Means for Solving the Problems

[0006] A first aspect of the pillow according to the present invention is a first cushion having a plurality of first protrusions, a second cushion having a plurality of second protrusions whose protruding dimensions are different from those of the first protrusions, and the surface on which the second protrusions protrude is arranged to face the surface on which the first protrusions protrude and is overlapped with the first cushion, and a gap formed between the second protrusions arranged between the first protrusions and the first cushion, and the gist is to include these.

[0007] A second aspect of the pillow according to the present invention is, in the first aspect, The first cushion may comprise a first block having the first projection, and a second block arranged alongside the first block, having a plurality of third projections with projection dimensions different from those of the first projection.

[0008] A third aspect of the pillow according to the present invention is, in the second aspect, The protruding dimension of the third projection may differ from the protruding dimension of the second projection.

[0009] A fourth aspect of the pillow according to the present invention is that, in any one of the first, second, and third aspects, The spacing between the first protrusions and the spacing between the second protrusions may be different.

[0010] A fifth aspect of the pillow according to the present invention is, in any one of the first, second, third, and fourth aspects, The surface on which the first projection protrudes in the first cushion and the surface on which the second projection protrudes in the second cushion may be profiled surfaces. [Effects of the Invention]

[0011] According to the pillow of the present invention, a gap can be formed simply by stacking the first cushion and the second cushion, making it less prone to stuffiness. [Brief explanation of the drawing]

[0012] [Figure 1] This is a cross-sectional view of the pillow according to the first embodiment, obtained by cutting it in the transverse direction. [Figure 2] This is a cross-sectional view taken by disassembling the pillow according to the first embodiment. [Figure 3] This is a schematic perspective view showing a disassembled pillow according to the first embodiment. [Figure 4] (a) is a schematic diagram showing the arrangement of the first protrusions of the first cushion in the first embodiment, and (b) is a schematic diagram showing the arrangement of the second protrusions of the second cushion in the first embodiment. The solid circles represent the protrusions, and the dashed circles represent the valleys between the protrusions. [Figure 5] It is a cross-sectional view of the pillow according to the second embodiment cut in the lateral direction. [Figure 6] It is a cross-sectional view of the pillow according to the second embodiment cut in the lateral direction, showing the disassembled state. [Figure 7] (a) is a schematic diagram showing the arrangement of the first protrusions of the first cushion of the second embodiment, and (b) is a schematic diagram showing the arrangement of the second protrusions of the second cushion of the second embodiment. The solid circles indicate the protrusions, and the two-dot chain circles indicate the valley portions between the protrusions. [Figure 8] It is a cross-sectional view of the pillow according to the third embodiment cut in the lateral direction. [Figure 9] It is a cross-sectional view of the pillow according to the third embodiment cut in the lateral direction, showing the disassembled state. [Figure 10] (a) is a schematic diagram showing the arrangement of the first and third protrusions of the first cushion of the third embodiment, and (b) is a schematic diagram showing the arrangement of the second protrusions of the second cushion of the third embodiment. The solid circles indicate the protrusions, and the two-dot chain circles indicate the valley portions between the protrusions. [Figure 11] It is a schematic perspective view showing the cushion of the modified example.

Mode for Carrying Out the Invention

[0013] Next, the pillow according to the present invention will be described below with reference to the accompanying drawings by giving preferred embodiments. The embodiments and drawings described below illustrate a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and can be appropriately changed without departing from the gist of the present invention. In the following description of the pillow, when the user's head is placed on the pillow, the direction along the height is referred to as the longitudinal direction, and the direction along the shoulder width is referred to as the lateral direction. Also, the thickness direction of the pillow is the vertical direction when the pillow is in use, and corresponds to the protruding direction of the protrusions described later.

[0014] (First Embodiment) As shown in FIG. 1, the pillow 10 according to the first embodiment includes a first cushion 12 having a plurality of first protrusions 14, and a second cushion 16 having a plurality of second protrusions 18, and the second cushion 16 is arranged to overlap the first cushion 12 with the surface on which the second protrusions 18 protrude facing the surface on which the first protrusions 14 protrude. Further, a gap S is formed between the second protrusions 18 arranged between the first protrusions 14 and the first cushion 12. The pillow 10 is such that one of the first cushion 12 and the second cushion 16 is placed on the other, and the first cushion 12 and the second cushion 16 are not adhered with an adhesive or the like and are separable from each other. Also, in the pillow 10, one of the protrusions 14, 18 in the first cushion 12 and the second cushion 16 is arranged between the other protrusions 18, 14, and the protrusions 14, 18 of each other abut, thereby suppressing displacement in the vertical and horizontal directions of the first cushion 12 and the second cushion 16. In the first embodiment, the first cushion 12 is arranged on the lower side and the second cushion 16 is arranged on the upper side of the first cushion 12, but it can be used with the vertical direction reversed. Also, the first embodiment exemplifies a case where the pillow 10 is provided by being housed in a cover 100 made of cloth or the like.

[0015] The first cushion 12 and the second cushion 16 are preferably formed of a foam such as a polyurethane foam or a polyolefin-based foam, and among foams, a semi-rigid or soft polyurethane foam is suitable. In addition, the first cushion 12 and the second cushion 16 may be formed of a recycled product in which pulverized foam such as a polyurethane foam is compacted with a binder (adhesive). Also, the polyurethane foam is not particularly limited, but may be a soft polyurethane slab foam or a soft polyurethane mold foam.

[0016] As shown in Figure 2, the first cushion 12 has a first base 13 and a first projection 14 that protrudes from one surface of the first base 13. In plan view, the first cushion 12 is a rectangle in which the horizontal direction is longer than the vertical direction (see Figure 3). Multiple first projections 14 are arranged in a row in the horizontal and vertical directions (see Figure 4(a)). On one surface of the first cushion 12, the first projections 14 and the valleys formed between adjacent first projections 14 are arranged alternately in the horizontal and vertical directions. The first projections 14 arranged in a horizontal row and the first projections 14 arranged in a horizontal row adjacent to this row in the vertical direction are offset in the horizontal direction. The first projections 14 arranged in a vertical row and the first projections 14 arranged in a vertical row adjacent to this row in the horizontal direction are offset in the vertical direction. In the first cushion 12, four first projections 14 surrounding one valley are arranged in a rhombus shape. Multiple first protrusions 14 are arranged in a staggered pattern. Each first protrusion 14 has a mountain-like shape, spreading outwards in all directions from an arc-shaped apex, and the bases of adjacent first protrusions 14 in the horizontal or vertical direction are connected in an arc shape. Furthermore, the first protrusion 14 and the valley portion formed by four adjacent first protrusions 14 in the vertical and horizontal directions have a vertically symmetrical concave-convex shape. The surface of the first cushion 12 from which the first protrusions 14 protrude is a profiled surface formed by profiling.

[0017] As shown in Figure 2, the multiple first protrusions 14 have the same or approximately the same projection dimension H1 from the first base 13. In the first cushion 12, the projection dimension H1 of the first protrusion 14 is the same as the thickness A1 of the first base 13. However, the thickness A1 of the first base 13 may be smaller or larger than the projection dimension H1 of the first protrusion 14.

[0018] As shown in Figure 4(a), the first cushion 12 has the same or approximately the same spacing W1a between adjacent first protrusions 14 in the horizontal direction. Furthermore, the first cushion 12 has the same or approximately the same spacing W1b between adjacent first protrusions 14 in the vertical direction. Moreover, the first cushion 12 has the same or approximately the same spacing W1a between adjacent first protrusions 14 in the horizontal direction and the same spacing W1b between adjacent first protrusions 14 in the vertical direction. Note that the spacings W1a and W1b between the first protrusions 14 are not necessarily the same; they may be within predetermined ranges or differ accordingly.

[0019] As shown in Figure 2, the second cushion 16 has a second base 17 and a second projection 18 that protrudes from one surface of the second base 17. In plan view, the second cushion 16 is a rectangle in which the horizontal direction is longer than the vertical direction (see Figure 3). Multiple second projections 18 are arranged in a row in the horizontal and vertical directions (see Figure 4(b)). On one surface of the second cushion 16, the second projections 18 and the valleys formed between adjacent second projections 18 are arranged alternately in the horizontal and vertical directions. The second projections 18 arranged in a horizontal row and the second projections 18 arranged in a horizontal row adjacent to this row in the vertical direction are offset in the horizontal direction. The second projections 18 arranged in a vertical row and the second projections 18 arranged in a vertical row adjacent to this row in the horizontal direction are offset in the vertical direction. In the second cushion 16, four second projections 18 surrounding one valley are arranged in a rhombus shape. Multiple second protrusions 18 are arranged in a staggered pattern. Each second protrusion 18 has a mountain-like shape, spreading outwards in all directions from an arc-shaped apex, and the bases of adjacent second protrusions 18 in the horizontal or vertical direction are connected in an arc shape. Furthermore, the second protrusion 18 and the valley formed by four adjacent second protrusions 18 in the horizontal and vertical directions have a vertically symmetrical concave-convex shape. The surface of the second cushion 16 from which the second protrusions 18 protrude is a profiled surface from which multiple second protrusions 18 have been formed by profile processing.

[0020] As shown in Figure 2, the multiple second protrusions 18 have the same or approximately the same projection dimension H2 from the second base 17. In the second cushion 16, the projection dimension H2 of the second protrusion 18 is the same as the thickness A2 of the second base 17. However, the thickness A2 of the second base 17 may be smaller or larger than the projection dimension H2 of the second protrusion 18.

[0021] As shown in Figure 4(b), the second cushion 16 has the same or approximately the same spacing W2a between adjacent second protrusions 18 in the lateral direction. Furthermore, the second cushion 16 has the same or approximately the same spacing W2b between adjacent second protrusions 18 in the vertical direction. Moreover, the second cushion 16 has the same or approximately the same spacing W2a between adjacent second protrusions 18 in the lateral direction and the same spacing W2b between adjacent second protrusions 18 in the vertical direction. Note that the spacings W2a and W2b between the second protrusions 18 are not necessarily the same; they may be within a predetermined range or differ accordingly.

[0022] As shown in Figure 2, the protrusion dimension H1 of the first projection 14 and the protrusion dimension H2 of the second projection 18 are different. Specifically, the protrusion dimension H1 of the first projection 14 is larger than the protrusion dimension H2 of the second projection 18. The tip of the first projection 14 is thinner than the tip of the second projection 18. Also, the tip of the first projection 14 is smaller than the size of the valley portion surrounded by the adjacent second projections 18, and a gap S is formed between the first projection 14 and the second projection 18 located in the valley portion surrounded by the adjacent second projections 18. Furthermore, the gap S is connected to each other and leads to the side surface of the pillow 10.

[0023] As shown in Figure 1, the thickness of the first cushion 12 (protrusion dimension H1 of the first projection 14 + thickness A1 of the first base 13) and the thickness of the second cushion 16 (protrusion dimension H2 of the second projection 18 + thickness A2 of the second base 17) are different. Specifically, the thickness of the first cushion 12 is greater than the thickness of the second cushion 16. In Figure 1, the first cushion 12 is thicker than the second cushion 16, but the second cushion 16 may be thicker than the first cushion 12. Furthermore, the thicknesses of the first cushion 12 and the second cushion 16 are not limited to being different; they may be the same or approximately the same.

[0024] As shown in Figure 4, in the pillow 10 of the first embodiment, the spacing W1a, W1b between the first protrusions 14 and the spacing W2a, W2b between the second protrusions 18 are the same or substantially the same. One first protrusion 14 is positioned in a valley surrounded by adjacent second protrusions 18 in the vertical and horizontal directions, and one second protrusion 18 is positioned in a valley surrounded by adjacent first protrusions 14 in the vertical and horizontal directions (see Figure 1). In this way, the first protrusions 14 and the second protrusions 18 are positioned alternately between the opposing protrusions 18, 14.

[0025] The first cushion 12 and the second cushion 16 may be made of the same material (for example, a combination of polyurethane foams) or different materials (for example, a combination of polyurethane foam and polyolefin foam). Furthermore, the first cushion 12 and the second cushion 16 may have the same physical properties or different physical properties. Specifically, the first cushion 12 and the second cushion 16 may have the same density, cell count (if they are foams), hardness, rebound elasticity, compression set, and air permeability, or one or more of these may differ.

[0026] In the pillow 10 according to the first embodiment, the protrusion dimension H1 of the first projection 14 on the first cushion 12 and the protrusion dimension H2 of the second projection 18 on the second cushion 16 are different. Therefore, when the projections 14 and 18 of each cushion are placed between the projections 18 and 14 of the other cushion, a gap S is formed between the projections 14 and 18 and the other cushions 16 and 12. In this way, the pillow 10 has a gap S between the first cushion 12 and the second cushion 16, which improves breathability and makes it less likely to get stuffy during use.

[0027] In the pillow 10 according to the first embodiment, the first projection 14 and the second projection 18 are positioned between the opposing projections 18 and 14, so that lateral and vertical displacement can be suppressed even without bonding the first cushion 12 and the second cushion 16. Thus, since the pillow 10 does not bond the first cushion 12 and the second cushion 16, it does not have a relatively hard hardened layer in the middle formed by solidified adhesive, and does not cause a decrease in breathability or feel due to a hardened layer. Moreover, it does not have the problem of odor caused by organic solvents or additives contained in the adhesive. Furthermore, since the pillow 10 is not bonded, it dries easily after washing.

[0028] In the pillow 10 according to the first embodiment, when a load is applied in the thickness direction, the tall first protrusion 14 initially supports the load, thus reducing the load required for initial compression and allowing for soft support of the head in the initial stages. Furthermore, by supporting the load with multiple first protrusions 14, the pressure can be distributed. As the load is further applied in the thickness direction, not only the tall first protrusions 14 but also the shorter second protrusions 18 come into contact with the first cushion 12, allowing for support of a relatively large load. This suppresses excessive sinking of the head, supports the head in an appropriate posture, and avoids the feeling of bottoming out. The pillow 10's degree of support against input load can be easily adjusted by changing the protrusion dimensions H1, H2 of the protrusions 14, 18, and the spacing W1a, W1b, W2a, W2b between the protrusions 14, 18.

[0029] Since the surface on which the first protrusion 14 protrudes in the first cushion 12 and the surface on which the second protrusion 18 protrudes in the second cushion 16 can be formed by profile processing, the protrusions 14 and 18 can be easily formed with protrusion dimensions H1, H2 and spacing W1a, W1b, W2a, W2a that are suitable for forming a gap S and distributing pressure. Furthermore, it is preferable to make the outer dimensions of the second cushion 16 the same as or slightly larger than those of the first cushion 12. This helps to prevent the sleeping comfort at the edges of the pillow 10 from deteriorating.

[0030] (Second Embodiment) The pillow 20 according to the second embodiment will be described with reference to Figures 5 to 7. In the following second embodiment, the configurations that differ from the first embodiment will be mainly described, and the same reference numerals will be used for components that are the same as in the first embodiment, and their description will be omitted.

[0031] As shown in Figures 5 and 6, the pillow 20 according to the second embodiment comprises a first cushion 12 having a plurality of first protrusions 14, and a second cushion 16 having a plurality of second protrusions 18, which is arranged overlapping the first cushion 12 with the surfaces on which the second protrusions 18 protrude facing the surfaces on which the first protrusions 14 protrude. In addition, a gap S is formed between the second protrusions 18, which are arranged between the first protrusions 14, and the first cushion 12 (see Figure 5). The second embodiment differs from the first embodiment in that the spacing W1a, W1b between the first protrusions 14 and the spacing W2a, W2b between the second protrusions 18 are different.

[0032] As shown in Figure 7, in the pillow 20 of the second embodiment, the spacing W1a, W1b between the first protrusions 14 and the spacing W2a, W2b between the second protrusions 18 are different. Specifically, the spacing W2a, W2b between the second protrusions 18 is larger than the spacing W1a, W1b between the first protrusions 14. In the second embodiment, two first protrusions 14 are arranged in a valley surrounded by adjacent second protrusions 18 in the vertical and horizontal directions, and one second protrusion 18 is arranged in a valley surrounded by adjacent first protrusions 14 in the vertical and horizontal directions (see Figure 5). In the second embodiment, the spacing W2a and W2b between the second protrusions 18, which have a smaller protrusion dimension H2 than the first protrusion 14, is made larger than the spacing W1a and W1b between the first protrusions 14. However, the spacing W2a and W2b between the second protrusions 18 may be made smaller than the spacing W1a and W1b between the first protrusions 14.

[0033] The pillow 20 of the second embodiment provides the following effects in addition to the effects of the first embodiment described above. Since the spacing W1a, W1b between the first protrusions 14 and the spacing W2a, W2b between the second protrusions 18 are different, it is possible to form a space between one protrusion 14 (first protrusion 14 in the second embodiment) where the other protrusion 18 (second protrusion 18 in the second embodiment) is not positioned. As a result, the gap S between the first cushion 12 and the second cushion 16 becomes larger, improving breathability and making it less prone to stuffiness. In the pillow 20, the protrusion dimensions H1 of the first protrusion 14 and the protrusion dimensions H2 of the second protrusion 18 are different, but the protrusion dimensions H1 of the first protrusion 14 and the protrusion dimensions H2 of the second protrusion 18 may be the same. In other words, the protrusion dimensions H1 of the first projection 14 and the protrusion dimensions H2 of the second projection 18 may be made the same, while only the spacing W1a, W1b between the first projections 14 and the spacing W2a, W2b between the second projections 18 may be made different from each other.

[0034] (Third embodiment) The pillow 30 according to the third embodiment will be described with reference to Figures 8 to 10. In the following third embodiment, the configurations that differ from the first embodiment will be mainly described, and the same reference numerals will be used for components that are the same as in the first embodiment, and their description will be omitted.

[0035] As shown in Figures 8 and 9, the pillow 30 according to the third embodiment comprises a first cushion 12 having a plurality of first protrusions 14 and a plurality of third protrusions 36, and a second cushion 16 having a plurality of second protrusions 18, which is arranged overlapping the first cushion 12 with the surface on which the second protrusions 18 protrude facing the surface on which the first protrusions 14 protrude. In addition, a gap S is formed between the second protrusions 18 arranged between the first protrusions 14 and the first cushion 12 (see Figure 8). The third embodiment differs from the first embodiment in that the first cushion 12 is composed of a plurality of blocks 32, 34.

[0036] The first cushion 12 of the third embodiment comprises a first block 32 having a first projection 14, and a second block 34 arranged alongside the first block 32 and having a plurality of third projections 36 with different projection dimensions H1 and H3 of the first projection 14. The first cushion 12 is composed of two first blocks 32 and a second block 34 arranged between the two first blocks 32, whereas the second cushion 16 is a single unit. The first block 32 and the second block 34 are simply arranged side by side in the horizontal direction, and are not bonded together with adhesive or the like, making them separable from one another. By making the dimensions of the second cushion 16 slightly larger than those of the first cushion 12, it is possible to suppress the first cushion 12 from falling apart, suppress the deterioration of comfort at the ends of the pillow 30, and further make it easier to turn over in your sleep.

[0037] As shown in Figure 9, the projection dimension H1 of the first projection 14 and the projection dimension H3 of the third projection 36 are different. Specifically, the projection dimension H1 of the first projection 14 is larger than the projection dimension H3 of the third projection 36. Note that the thickness A1 of the first base of the first block 32 and the thickness A3 of the third base of the second block 34 are the same. Also, the projection dimension H3 of the third projection 36 is smaller than the projection dimension H2 of the second projection 18. Note that the projection dimension H3 of the third projection 36 is not limited to being different from the projection dimension H2 of the second projection 18; it may be the same as or approximately the same as the projection dimension H2 of the second projection 18. If the protrusion dimensions H2 of the second projection 18 and the protrusion dimensions H3 of the third projection 36 are the same, a gap S can be formed by making the spacing W2a, W2b between the second projections 18 and the spacing W3a, W3b between the third projections 36 different, thereby making the pillow 30 less prone to stuffiness.

[0038] As shown in Figure 10, the spacing W1a, W1b between the first protrusions 14 and the spacing W3a, W3b between the third protrusions 36 are the same or approximately the same. Note that the spacing W3a, W3b between the third protrusions 36 is not limited to being the same as the spacing W1a, W1b between the first protrusions 14; the spacing W3a, W3b between the third protrusions 36 may be different from the spacing W1a, W1b between the first protrusions 14. If the spacing W1a, W1b between the first protrusions 14, the spacing W2a, W2b between the second protrusions 18, and the spacing W3a, W3b between the third protrusions 36 are the same, a gap S can be formed by making the protrusion dimensions H1 of the first protrusion 14, H2 of the second protrusion 18, and H3 of the third protrusion 36 different, thereby making the pillow 30 less prone to stuffiness.

[0039] The pillow 30 of the third embodiment provides the following effects in addition to the effects of the first embodiment described above. The first cushion 12 of the third embodiment comprises a first block 32 having a first projection 14, and a second block 34 arranged alongside the first block 32 and having a plurality of third projections 36 with different projection dimensions H1 and H3 of the first projection 14. This makes it possible to change the height of the pillow 30 and the size of the gap S between the cushions 12 in the area where the first block 32 is located and the area where the second block 34 is located. Specifically, since the first projection 14 of the first block 32 is higher than the third projection 36 of the second block 34, the pillow 30 can support the head of a user lying on their side at a higher position on both sides than in the center. In this way, by raising both sides of the pillow 30, it is possible to make the pillow 30 suitable for sleeping on one's side. Furthermore, because the second cushion 16 is made from a single component, when turning over in bed, the user can turn over without feeling the difference in height between the first block 32 and the second block 34. The third protrusion 36 of the second block 34 is lower than the first protrusion 14 of the first block 32, so the gap S between the second cushion 16 and the pillow 30 is larger in the center of the pillow 30, making it less likely to get stuffy when the head is supported in the center of the pillow 30. In this way, by constructing the first cushion 12 by combining multiple blocks 32 and 34 with different protrusion dimensions H1 and H3 of the protrusions 14 and 36, the height of the pillow 30 can be easily adjusted to the user's preference.

[0040] In the third embodiment, the first cushion 12 is composed of multiple blocks 32, 34 arranged horizontally, but various combinations are possible, such as arranging multiple blocks vertically, or arranging multiple blocks vertically and horizontally. For example, by making the protrusions of the blocks on the vertical top side relatively low and the protrusions of the blocks on the vertical neck side relatively high, the height of the protrusions can be set to match the shape of the body from the neck to the back of the head, thereby providing appropriate support for the neck and the back of the head.

[0041] The total height of pillows 10, 20, and 30 should be set to approximately 30mm to 150mm. The length and width dimensions of pillows 10, 20, and 30 should be set to approximately 630mm x 430mm as a standard, but they can be larger or smaller than this standard. Either the first cushion 12 or the second cushion 16 can be thicker.

[0042] (Example test) Pillows were created under the conditions shown in Tables 1 to 3, and their breathability was evaluated. The first cushion, placed on the bottom, was made of high-hardness polyurethane foam (product number: EMB) manufactured by Inoac Corporation, and the second cushion, placed on the top, was made of low-rebound polyurethane foam (product number: EGR-40S) manufactured by Inoac Corporation. In Tables 2 and 3, the left, center, and right columns indicate the arrangement of blocks in the horizontal direction. In Table 2, the front, center, and back columns indicate the arrangement of blocks in the vertical direction, with the front being the top of the head and the back being the neck. The "total thickness" of the pillows in Tables 1 to 3 is the sum of the thickness of the base and the protruding dimension of the protrusions (base thickness + protruding dimension of the protrusions).

[0043] The "Δ protrusion dimension" shown in Tables 1-3 is the absolute value of the difference between the protrusion dimension (H1) or the protrusion dimension (H3) of the first projection of the first cushion and the protrusion dimension (H2) of the second projection of the second cushion. The "Δ spacing" shown in Tables 1-3 is the absolute value of the difference between the spacing between the first projections of the first cushion (W1a, W1b) or the spacing between the third projections (W3a, W3b) and the spacing between the second projections of the second cushion (W2a, W2b). If the "Δ protrusion dimension" is 10 mm or more, it is judged as a double circle; if the "Δ protrusion dimension" is 3 mm or more but less than 10 mm, it is judged as a single circle; and if the "Δ protrusion dimension" is less than 3 mm, it is judged as a triangle. Similarly, if there is a "Δ spacing" of 10 mm or more, the "Δ spacing" is judged as a double circle; if there is a "Δ spacing" of 3 mm or more but less than 10 mm, the "Δ spacing" is judged as a single circle; and if there is a "Δ spacing" of less than 3 mm, the "Δ protrusion dimension" is judged as a triangle. In the judgment of the "Δ protrusion dimension" and "Δ spacing", a double circle is judged as 2 points, a single circle as 1 point, and a triangle as 0 points. If the score is 2 points or more, the breathability is judged as a double circle (excellent breathability); if the score is less than 2 points but 1 point or more, the breathability is judged as a single circle (good breathability); and if the score is 0 points, the breathability is judged as a triangle (insufficient breathability). The results are shown in Tables 1 to 3.

[0044] [Table 1]

[0045] [Table 2]

[0046] [Table 3]

[0047] As shown in Tables 1 to 3, in Examples 1 to 14, where the protrusion dimensions and spacing of the protrusions of the first cushion and the second cushion differed, it was confirmed that the airflow was improved compared to Comparative Example 1, where the protrusion dimensions of the protrusions of the first cushion and the second cushion were the same.

[0048] (Example of change) The present invention is not limited to the aforementioned matters, but may also be applied as follows, for example. Furthermore, the present invention is not limited to the embodiments and the following specific examples of modifications. (1) In this embodiment, the protrusions are formed in a mountain shape, but the invention is not limited to this, and as shown in Figure 11, the protrusions 14 and 18 may be formed in a ridge shape using a contour machine. Also, although all the protrusions in Figure 11 have the same shape, the protrusion dimensions and the spacing between the protrusions may be varied. (2) In this embodiment, the cushion is formed from foam, but it is not limited to this and may be a multilayer structure combining foam and materials other than foam, such as fibers. [Explanation of Symbols]

[0049] 10, 20, 30 Pillow, 12 First cushion, 14 First protrusion, 16 Second cushion, 18 Second projection, 32 First block, 34 Second block, 36 Third projection, H1 projection dimension (first projection), H2 projection dimension (second projection), H3 projection dimension (third projection), W1a lateral spacing (first projection), W1b vertical spacing (first projection), W2a horizontal spacing (second projection), W2b vertical spacing (second protrusion), W3a horizontal spacing (third protrusion), W3b Vertical spacing (third protrusion)

Claims

1. A first cushion having multiple first protrusions, A second cushion having a plurality of second protrusions with protrusion dimensions different from those of the first protrusion, and positioned on top of the first cushion with the surfaces on which the second protrusions protrude facing the surfaces on which the first protrusions protrude, A pillow comprising a gap formed between the second protrusion and the first cushion, which is positioned between the first protrusions.

2. The pillow according to claim 1, wherein the first cushion comprises a first block having the first projection, and a second block arranged alongside the first block and having a plurality of third projections with protrusion dimensions different from those of the first projection.

3. The pillow according to claim 2, wherein the protruding dimension of the third projection is different from the protruding dimension of the second projection.

4. The pillow according to claim 1, wherein the spacing between the first protrusions and the spacing between the second protrusions are different.

5. The pillow according to claim 1, wherein the surface on which the first projection of the first cushion protrudes and the surface on which the second projection of the second cushion protrudes are profiled surfaces.

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