pillow

Abstract

For example, a pillow made of an woven resin network structure in which a plurality of filamentous molten resins are entangled and partially heat-welded, the width direction of the pillow being made up of a first region 10 located in the center, a third region 30 located at both ends, and a second region 20 located between the first region 10 and the third region 30, the thickness gradually increasing from the center to the ends, the first region 10 being wider than the second region 20 and the third region 30, the second region 20 being wider than the third region 30, the third region 30 being harder than the first region 10, and the second region 20 being harder than the third region 30. This can more effectively improve the quality of sleep.

Description

[Technical field]

[0001] The present invention relates to a pillow made of a knitted resin network. [Background technology]

[0002] 2. Description of the Related Art Various pillows have been proposed for the purpose of improving the quality of sleep. For example, Patent Document 1 discloses a pillow made of a woven resin network structure which, in the height direction, consists of an upper layer, a lower layer, and a middle layer, the lower layer being harder than the upper layer and the middle layer being harder than the upper layer and softer than the lower layer, and at the boundary between the upper and middle layers, the woven resin of the upper layer and the woven resin of the middle layer are intertwined, and at the boundary between the middle and lower layers, the woven resin of the middle layer and the woven resin of the lower layer are intertwined, and in the width direction, consists of a central region, end regions, and a space between the regions, the end regions are harder than the central region and the space between the regions are harder than the central region and softer than the end regions, and at the boundary between the central region and the space between the regions, the woven resin of the central region and the woven resin of the space between the regions are intertwined, and at the boundary between the space between the regions and the end regions, the woven resin of the space between the regions and the end regions are intertwined. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-142379 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] The pillow of Patent Document 1 can effectively improve the quality of sleep. However, people have different preferences for pillows. Therefore, an object of the present invention is to provide a pillow that improves sleep quality more effectively from a different perspective than the pillow of Patent Document 1. [Means for solving the problem]

[0005] The pillow of the present invention described in claim 1 is composed of a first region 10 located in the center, a third region 30 located at both ends, and a second region 20 located between the first region 10 and the third region 30 in the width direction. Both The thickness gradually increases toward the ends, the first region 10 is wider than the second region 20 and the third region 30, the second region 20 is wider than the third region 30, the third region 30 is harder than the first region 10, and the second region 20 is harder than the third region 30. The present invention described in claim 2 is characterized in that, in the pillow described in claim 1, it comprises an woven resin network structure in which a plurality of filaments of molten resin are entangled and partially heat-welded, and the second region 20 has a core portion 40 between one surface 2 and the other surface 3, which has a bulk density greater than that of the surrounding area. The present invention described in claim 3 is characterized in that, in the pillow described in claim 2, in the second region 20, the distance H1 from one surface 2 to the core 40 is greater than the distance H2 from the other surface 3 to the core 40. The present invention described in claim 4 is characterized in that, in the pillow described in claim 2, the boundary portion between the other surface 3 and one end surface 6 and the other end surface 7 in the width direction is curved, and a gap α is created between the other surface 3 and the floor so that the user's hands can fit in. The present invention as set forth in claim 5 is characterized in that, in the pillow as set forth in claim 2, the pillow comprises, in the depth direction, a first depth region 50 located in the center, a third depth region 70 located at both ends, and a second depth region 60 located between the first depth region 50 and the third depth region 70 to support the user's neck, the second depth region 60 being harder than the first depth region 50 and the third depth region 70, and the third depth region 70 being softer than the first depth region 50. The present invention described in claim 6 is characterized in that, in the pillow described in claim 2, the second region 20 consists of a plurality of small regions 21 of different hardness in the width direction, and among adjacent small regions 21, the one closer to the first region 10 is softer. The present invention as set forth in claim 7 is characterized in that in the pillow as set forth in claim 2, the core portion 40 of the second region 20 is locally provided with a hard portion 80 having a bulk density greater than that of the surrounding area. The present invention as set forth in claim 8 is characterized in that in the pillow as set forth in claim 2, the core portion 40 of the second region 20 is formed with a through hole 90 in the depth direction. The present invention as set forth in claim 9 is characterized in that, in the pillow as set forth in claim 8, a cooling material is provided to be inserted into the through hole 90. The present invention as set forth in claim 10 is characterized in that in the pillow as set forth in claim 8, a cushioning material that is softer than the core portion 40 inserted into the through hole 90 is provided. The present invention as described in claim 11 is characterized in that, in the pillow as described in claim 2, it has a multi-layer structure of three or more layers with different hardness in the height direction, and the layers on one surface 2 and the other surface 3 are softer than the layer in the central part in the height direction. Effect of the Invention

[0006] According to the present invention, a pillow that more effectively improves sleep quality can be provided. [Brief description of the drawings]

[0007] [Figure 1] Schematic front view of a pillow according to a first embodiment of the present invention. [Diagram 2] Schematic top view of the pillow [Diagram 3] Schematic front view of a pillow according to a second embodiment of the present invention. [Figure 4] Schematic top view of the pillow [Diagram 5] Schematic front view of a pillow according to a third embodiment of the present invention. [Figure 6] Schematic front view of a pillow according to a fourth embodiment of the present invention. [Figure 7] Schematic front view of a pillow according to a fifth embodiment of the present invention. [Figure 8] FIG. 1 shows a pillow manufacturing apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The pillow according to the first embodiment of the present invention is composed, in the width direction, of a first region located in the center, a third region located at both ends, and a second region located between the first and third regions, and the thickness gradually increases from the center to the ends, with the first region being wider than the second and third regions, the second region being wider than the third region, the third region being harder than the first region, and the second region being harder than the third region. According to this embodiment, it is possible to encourage the user to turn over in their sleep, thereby improving the quality of sleep.

[0009] A second embodiment of the present invention is a pillow according to the first embodiment, which is made of an woven resin network structure in which a plurality of filaments of molten resin are entangled and partially heat-welded, and the second region has a core between one surface and the other surface which has a bulk density greater than the surrounding area. According to this embodiment, by making only the middle portion of the second region hard and the surface portion soft, it is possible to improve the cushioning effect when the user places his / her head on it.

[0010] A third embodiment of the present invention is the pillow according to the second embodiment, wherein in the second region, the distance from one surface to the core is greater than the distance from the other surface to the core. According to this embodiment, the thickness of the soft layer from one surface to the core is large, so that the user can easily turn from the first region to the second region, and can feel good cushioning even when the head is in the second region. Also, the soft layer from the other surface to the core has a predetermined thickness, so that the user does not feel the bottom of the pillow, and the comfort of the user can be improved.

[0011] The fourth embodiment of the present invention is a pillow according to the second embodiment, in which the boundary between the other surface and one end face and the other end face in the width direction is curved, and a gap is created between the other surface and the floor so that the user's hands can fit in. According to this embodiment, the user can feel even more relaxed by inserting his / her hands into the gap between the pillow and the floor.

[0012] A fifth embodiment of the present invention is a pillow according to the second embodiment, in which the depth direction includes a first depth region located in the center, a third depth region located at both ends, and a second depth region located between the first depth region and the third depth region for supporting the user's neck, the second depth region being harder than the first depth region and the third depth region, and the third depth region being softer than the first depth region. According to this embodiment, the neck and the like of the user can be comfortably supported.

[0013] A sixth embodiment of the present invention is a pillow according to the second embodiment, in which the second region is made up of a plurality of small regions with different hardness in the width direction, and among adjacent small regions, the one closer to the first region is softer. According to this embodiment, the second region is relatively soft on the first region side and relatively hard on the third region side, making it easier for the user to turn over in sleep.

[0014] A seventh embodiment of the present invention is such that in the pillow according to the second embodiment, a hard portion having a bulk density greater than the surrounding area is locally provided in the core of the second region. According to this embodiment, by providing the hard portion, the second region which is the hardest in the width direction can be made a little harder without impairing the cushioning properties.

[0015] An eighth embodiment of the present invention is a pillow according to the second embodiment, wherein a through hole is formed in the depth direction in the core part of the second region. According to this embodiment, the through holes are formed in the core, so that the core has a multi-layer structure with different hardness in the height direction (thickness direction), and the cushioning of the second region, which is a relatively hard part, can be improved. Also, the through holes improve breathability.

[0016] A ninth embodiment of the present invention relates to the pillow according to the eighth embodiment, further comprising a cooling material inserted into the through-hole. According to this embodiment, the cooling material is placed in the pillow to cool the user's head and other parts of the body, thereby improving discomfort when sleeping in the summer.

[0017] A tenth embodiment of the present invention relates to the pillow according to the eighth embodiment, and further comprises a cushioning material softer than the core inserted into the through hole. According to this embodiment, the user can adjust the cushioning properties of the second region by inserting a cushioning material.

[0018] An eleventh embodiment of the present invention is a pillow according to the second embodiment, which has a multi-layer structure of three or more layers with different hardness in the height direction, with the layers on one surface side and the other surface side being softer than the layer in the center in the height direction. According to this embodiment, it is possible to improve the comfortability of the user when placing the head on the pillow. EXAMPLES

[0019] First, a pillow according to a first embodiment of the present invention will be described. FIG. 1 is a schematic front view of a pillow according to a first embodiment, and FIG. 2 is a schematic top view of the same pillow. The pillow of the first embodiment is made of a knitted resin network structure in which a plurality of filamentous molten resin threads are intertwined and partially heat-welded. Since the shape of the knitted network structure itself forms the shape of the pillow, the pillow can be used as is without putting it in a cover. Note that pillows are generally colorless, transparent, or white, but for the purpose of explanation, some parts are colored or lined. The knitted resin network structure is formed by melt-kneading a thermoplastic resin at a predetermined temperature, allowing the molten resin to flow down in a filamentous form and cooling it. Thermoplastic resins include, for example, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polytetrafluoroethylene, and acrylonitrile butadiene styrene resins, and these can be used alone or in combination of two or more. The knitted resin network structure manufactured using a thermoplastic resin as a raw material can be recycled after use and reused as a raw material for knitted resin network structures, etc. In addition, the knitted resin network structure can be washed using water, etc., so that the pillow can be easily kept clean.

[0020] The pillow has a shape in which the thickness of the central portion in the width direction is smaller than the thickness of both ends, and has a gently sloping portion between the central portion and both ends. The pillow has different hardness (resilience) in the width direction. When divided by hardness in the width direction, there is a first region 10 located in the center and which is the softest, a third region 30 located at both ends and which is the second softest, and a second region 20 located between the first region 10 and the third region 30 and which is the hardest. For example, the hardness of the first region 10 is about 40% of the hardness of the second region 20, and the hardness of the third region 30 is about 70% of the hardness of the second region 20. These hardnesses (resiliences) are set by providing a difference in bulk density in the whole or in parts of each region. Note that bulk density is calculated by weight (g) divided by volume (cm 3 ) can be found. The first region 10 extends from the center to halfway through the inclined portion, the second region 20 extends from halfway through the inclined portion to halfway through the end portion, and the third region 30 is the remaining portion of the end portion. The sizes of each region are different, with the first region 10 being the widest, the second region 20 being the second widest, and the third region 30 being the smallest. There are two second regions 20 and two third regions 30, but the sizes of the second regions 20 are approximately the same, and the sizes of the third regions 30 are also approximately the same.

[0021] The pillow can be used with one surface 2 facing up or the other surface 3 facing up. The pillow is gradually thicker from the center to both ends, and the hardest second region 20 is provided between the first region 10 and the third region 30 with a width smaller than the first region 10 and larger than the third region 30, making it easier for the user to turn over in sleep and improving the quality of sleep.

[0022] At the boundary between the first region 10 and the second region 20, the knitted resin of the first region 10 and the knitted resin of the second region 20 are entangled, and at the boundary between the second region 20 and the third region 30, the knitted resin of the second region 20 and the knitted resin of the third region 30 are entangled. By having the knitted resins entangled at the boundaries of each region in this manner, the pillow has better shape retention and cushioning properties than when knitted resin network structures formed for each region are simply arranged in the width direction.

[0023] The second region 20 is harder than the first region 10 and the third region 30 due to the provision of a core 40 between the one surface 2 and the other surface 3, the core 40 having a higher bulk density than the surrounding areas. The bulk density around the core 40 is substantially the same as the bulk density of the first region 10. The second region 20 can be made harder than the first region 10 and the third region 30 by increasing the bulk density overall from the one surface 2 to the other surface 3, but by making only the intermediate portion harder and the surface portion softer, it is possible to improve the cushioning when the user places his / her head on it. The width of the core portion 40 may be substantially equal to the width of the second region 20 as shown in FIG.

[0024] It is preferable that the distance H1 from one surface 2 to the core 40 is greater than the distance H2 from the other surface 3 to the core 40. By making the thickness of the soft layer from one surface 2 to the core 40 greater, a user who uses one surface 2 as the upper side can easily turn from the first region 10 to the second region 20, and can also feel good cushioning even when the head is in the second region 20. In addition, when using the pillow with one surface 2 as the upper side, the other surface 3 comes into contact with the floor, but since the soft layer from the other surface 3 to the core 40 has a predetermined thickness, the user does not feel like the pillow is bottoming out, and the comfort of the user can be increased.

[0025] The boundary between the other surface 3 and one end surface 6 and the other end surface 7 in the width direction is curved, and when the one surface 2 is used with the pillow facing up, a gap α is created between the end of the bottom surface of the pillow (the other surface 3) and the floor, into which the user can insert their hands. By inserting their hands into the gap α created between the pillow and the floor, the user can feel even more relaxed. Furthermore, if the boundary portion between one surface 2 and the side surface is also made curved in a similar manner, even when the other surface 3 is used with the pillow facing up, a gap α can be created between the edge of the bottom surface of the pillow (one surface 2) and the floor so that the user can insert their hand.

[0026] The pillow also has different hardness (resilience) in the depth direction. If the pillow is divided by hardness in the depth direction, as shown in Fig. 2, there is a first depth region 50 located in the center and second softest, a third depth region 70 located at both ends and the softest, and a second depth region 60 located between the first depth region 50 and the third depth region 70 and the hardest. These hardnesses (resiliences) are set by providing differences in bulk density in the whole or part of each region. The second depth region 60 plays the role of a neck support section that supports the neck (cervical vertebrae) of the user. The second depth region 60 on which the user's neck rests is harder than the first depth region 50 on which the user's head rests, and the third depth region 70 on which the user's shoulders rest is softer than the first depth region 50, so that the user's neck and the like can be comfortably supported.

[0027] A user of the pillow can place his / her head on the pillow from one end surface 4 side in the depth direction, or from the other end surface 5 side in the depth direction. The width of one second depth region (neck support portion) 61 on one end face 4 side in the depth direction is greater than the width of the other second depth region (neck support portion) 62 on the other end face 5 side. Since the width of neck support portion 60 differs between one end face 4 side and the other end face 5 side in the depth direction, the user can select neck support portion 60 with a preferred width and decide the direction in which to place the head. The portion where the second depth region 60 and the third depth region 70 are provided may be rounded and raised to conform to the curvature of the user's neck. By adopting such a shape, it is possible to more appropriately support the user's neck and improve comfort.

[0028] Next, a pillow according to a second embodiment of the present invention will be described. Note that the same reference numerals are used to designate the same functional parts as those in the above-mentioned embodiment, and the description thereof will be omitted. FIG. 3 is a schematic front view of a pillow according to the second embodiment, and FIG. 4 is a schematic top view of the same pillow. In the pillow of the second embodiment, the second region 20 is made up of a plurality of small regions 21 with different hardness in the width direction, and among adjacent small regions 21, the one closer to the first region 10 is softer. Note that, as long as the second region 20 as a whole is harder than the third region 30, some of the small regions 21 may be softer than the third region 21. Also, although an example of the second region 20 made up of three small regions 21 is shown in Figs. 3 and 4, the second region 20 can also be formed of two small regions 21, or four or more small regions 21. As in the second embodiment, by making the first region 10 side of the second region 20 relatively soft and the third region 30 side relatively hard, the user can easily turn over in sleep.

[0029] Next, a pillow according to a third embodiment of the present invention will be described. Note that the same reference numerals are used to designate the same functional parts as those in the above-mentioned embodiment, and the description thereof will be omitted. FIG. 5 is a schematic front view of a pillow according to a third embodiment. In the pillow of the third embodiment, a plurality of hard parts 80 having a higher bulk density than the surroundings are locally provided in the second region 20 from one end surface 4 to the other end surface 5 in the depth direction. Note that FIG. 5 shows an example in which two hard parts 80 are provided in the core 40, one in the portion between the core 40 and one surface 2, and one in the portion between the core 40 and the other surface 3 in each second region 20, but the number, position, size, etc. of the hard parts 80 are not limited to this and can be arbitrarily set according to the size of the pillow, etc. However, it is preferable to provide the hard parts 80 in both the portion of the core 40 and the portion other than the core 40. Also, the second region 20 may be formed from a plurality of small regions 21 as in the second embodiment. By providing the hard portion 80 as in the third embodiment, the second region 20 which is the hardest in the width direction can be made a little harder without impairing the cushioning properties. It is also possible to provide a plurality of hard portions 80 in the first region 10, in which case it is possible to prevent the pillow from sinking too deeply when the head or the like is placed on the first region 10.

[0030] Next, a pillow according to a fourth embodiment of the present invention will be described. Note that the same reference numerals are used to designate the same functional parts as those in the above-mentioned embodiment, and the description thereof will be omitted. FIG. 6 is a schematic front view of a pillow according to the fourth embodiment. In the pillow of the fourth embodiment, a through hole 90 is formed in the core 40 in the second region 20 from one end surface 4 to the other end surface 5 in the depth direction. Although one through hole 90 is formed in each second region 20 in Fig. 6, it is also possible to provide a plurality of through holes 90 in each second region 20. Also, the second region 20 may be formed from a plurality of small regions 21 as in the second embodiment. By forming through holes 90 in the core 40 as in the fourth embodiment, it becomes as if the core 40 has a multi-layer structure with different hardness in the height direction (thickness direction), and the cushioning properties of the pillow can be improved. Also, by forming the through holes 90, the breathability can be improved.

[0031] A rod-shaped cooling material can also be inserted into the through-hole 90. By inserting the cooling material, the user's head is cooled, which can improve discomfort when sleeping in the summer. A cushioning material can also be inserted into the through-hole 90. The cushioning material is made of, for example, urethane and is softer than the core 40. The user can adjust the cushioning properties of the second region by inserting the cushioning material into the through-hole 90. If multiple types of cushioning materials with different softness are prepared, it becomes possible to use different cushioning materials according to physical condition or mood.

[0032] The through-holes 90 can also be formed in the first region 10. When the through-holes 90 are formed in the first region 10, it is as if the first region 10 has a multi-layer structure with different hardness in the height direction (thickness direction), and the cushioning properties of the pillow can be improved. In addition, in the through-holes 90 formed in the first region 10, a rod-shaped cooling material can be inserted as described above, and a core material formed to be harder than the surrounding area can also be inserted. When a core material is inserted, it is possible to prevent the first region 10 from sinking too much when the user places his / her head on it.

[0033] Next, a pillow according to a fifth embodiment of the present invention will be described. Note that the same reference numerals are used to designate the same functional parts as those in the above-mentioned embodiment, and the description thereof will be omitted. FIG. 7 is a schematic front view of a pillow according to the fifth embodiment. The pillow of the fifth embodiment has a linear hard portion 100 having a higher bulk density than the surrounding area in the first region 10. The linear hard portion 100 extends from the core portion 40 on one end face 6 side to the core portion 40 on the other end face 7 side in the width direction, and extends from the one end face 4 to the other end face 5 in the depth direction. By providing a linear hard portion 100 in the first region 10 as in the fifth embodiment, it is possible to prevent the pillow from sinking too much when the head or the like is placed on it, particularly when the pillow is used with the other surface 3 facing up.

[0034] Furthermore, although not shown in the drawings, the pillows of the first to fifth embodiments can also have a multi-layer structure with different hardness in the height direction. In the case of a multi-layer structure, the layer on one surface 2 side and the layer on the other surface 3 side are made softer than the layer in the center in the height direction. This improves the comfort of the user when he or she places their head on the pillow. The hardness (resilience) of each layer is set, for example, by making the bulk density different for each layer or by making the wire diameter of the knitted resin different for each layer.

[0035] FIG. 8 is a diagram showing a pillow manufacturing apparatus according to this embodiment. The pillow manufacturing device according to this embodiment includes an extruder 110 that melts and kneads thermoplastic resin at a predetermined temperature to form molten resin and extrudes the molten resin at a predetermined extrusion speed, a resin pool 130 that receives the molten resin extruded from the extruder 110 and causes the molten resin to flow down in threads from a number of holes (nozzles) in the bottom surface 131, a cooling water tank 140 that stores cooling water, and a take-up machine 150 that takes up downward the knitted resin 121 that is formed by cooling the thread-like molten resin 120 that flows down from the resin pool 130 with the cooling water. The take-up machine 150 has a plurality of take-up rollers 151 facing each other and is disposed in the cooling water tank 140. A guider 170 is provided between the resin pool 130 and the take-up machine 150. The filamentous molten resin 120 is formed when it flows down from the holes in the bottom surface 131 of the resin pool 130. The knitted resin 121 obtained by cooling the filamentous molten resin 120 with cooling water is drawn up by a drawer 150 to the bottom plate side of the cooling water tank 140, and after passing through the drawer 150, is drawn up obliquely upward while being cooled in the cooling water by a plurality of conveying rollers 160, which are drawing-up members arranged in the cooling water tank 140, and conveyed out of the cooling water tank 140. The knitted resin network structure as a pillow is then formed by cutting into a predetermined size after cooling. For example, the direction perpendicular to the extrusion direction can be the width direction of the pillow.

[0036] In the pillows of the first embodiment and the like described above, the second region 20 is made harder than the first region 10 and the second region 20 by providing a core portion 40, but the core portion 40 can be formed, for example, by increasing the number of holes provided in the bottom surface 131 of the resin pool 130 only in the portion corresponding to the core portion 40 compared to other portions, or by making the diameter of the holes larger only in the portion corresponding to the core portion 40 than in other portions. In addition, for example, the second region 20 can be made harder than the first region 10 and the second region 20 by forming a roughness / density in a direction parallel to the extrusion direction. The density variation in the direction parallel to the extrusion direction is formed, for example, by changing the take-up speed of the take-up machine 150 at predetermined time intervals. When the density variation is formed by the take-up speed, the speed at which the take-up machine 150 takes up the knitted resin 121 is set to a first speed, a second speed slower than the first speed, and a third speed slower than the first speed and faster than the second speed. Since the part of the knitted resin 121 taken up by the take-up machine 150 at the second speed has a higher bulk density than the part taken up at the first speed, the part taken up at the first speed becomes the first region 10, which is a sparse part with the smallest bulk density, the part taken up at the second speed becomes the second region 20, which is a dense part with the largest bulk density, and the part taken up at the third speed becomes the third region 30, which is a part with an intermediate bulk density between them. Therefore, by repeating the pattern of the take-up speed of the take-up machine 150 from the third speed to the second speed to the first speed to the second speed to the third speed, it is possible to manufacture a pillow having the second region 20 between the first region 10 and the third region 30 in the direction parallel to the extrusion direction. Here, by making the take-up time at the first speed the longest, the take-up time at the second speed the next longest, and the take-up time at the third speed the shortest, it is possible to make the widths different for each region. When the second region 20 is subdivided to provide small regions 21, the take-up speed of the take-up machine 150 may be set in even finer increments.

[0037] In addition, the pillow in the above embodiment is made of a woven resin network structure in which multiple filamentous molten resin threads are intertwined and partially heat-welded, but it is also possible to make the pillow out of other materials, such as urethane. [Explanation of symbols]

[0038] 2. One side 3. The other surface 10 First area 20 Second area 21 small area 30 Third area 40 core 50 First Depth Region 60 Second depth area (neck support) 70 Third Depth Region 80 hard part 90 Through hole H1: Distance from one surface to the core H2 Distance from the other surface to the core α Gap

Claims

1. The width direction includes a first region located in the center, a third region located at both ends, and a second region located between the first region and the third region, The thickness gradually increases from the central portion to the both ends, The first region is wider than the second region and the third region, The second region is wider than the third region, the third region being harder than the first region; The pillow is characterized in that the second region is harder than the third region.

2. The structure comprises an knitted resin network structure in which a plurality of filamentous molten resins are entangled and partially heat-welded, The pillow according to claim 1, characterized in that the second region has a core between one surface and the other surface, the core having a bulk density greater than that of the surrounding area.

3. The pillow according to claim 2, characterized in that in the second region, the distance from the one surface to the core is greater than the distance from the other surface to the core.

4. The pillow according to claim 2, characterized in that the boundary portion between the other surface and one end face and the other end face in the width direction is curved, and a gap is formed between the other surface and the floor so that the user's hands can fit in.

5. The depth direction includes a first depth region located in the center, a third depth region located at both ends, and a second depth region located between the first depth region and the third depth region and supporting the neck of the user, the second depth region being harder than the first depth region and the third depth region; The pillow of claim 2 , wherein the third depth region is softer than the first depth region.

6. The pillow according to claim 2, characterized in that the second region is made up of a plurality of small regions having different hardness in the width direction, and among adjacent small regions, the one closer to the first region is softer.

7. The pillow according to claim 2, characterized in that the core of the second region is locally provided with a hard portion having a bulk density greater than that of the surrounding area.

8. The pillow according to claim 2, characterized in that a through hole is formed in the core portion of the second region in the depth direction.

9. The pillow according to claim 8, further comprising a cooling material inserted into the through hole.

10. The pillow according to claim 8, further comprising a cushioning material softer than the core portion inserted into the through hole.

11. 3. The pillow according to claim 2, characterized in that it has a multi-layer structure of three or more layers with different hardness in the height direction, the layers on one surface side and the other surface side being softer than the layer in the center in the height direction.