JP2021094274A - Cushion material and pillow - Google Patents

Abstract

To provide a cushion material and pillow capable of improving comfort.SOLUTION: A cushion material 1 is the cushion material for a pillow. A plurality of projections 3 are arranged on a front surface of the cushion material 1. A center area including the center of the cushion material 1 in a width direction has rigidity smaller than that of at least a partial area positioned on an outer side of the cushion material 1 in the width direction from the center area.SELECTED DRAWING: Figure 1

Description

The present invention relates to cushioning materials and pillows.

Conventionally, in the cushion material used for pillows and the like, in order to improve comfort, a cushion material composed of a plate-shaped elastic foam having an uneven outer surface is known (see, for example, Patent Document 1). ..

JP-A-2002-306285

However, conventional cushioning materials are required to be further improved in comfort. In particular, there is a demand for further improvement in comfort when the posture of a person lying on the cushion material changes due to turning over or the like.

An object of the present invention made in view of such circumstances is to provide a cushioning material and a pillow capable of improving comfort.

The cushion material according to the present invention is
Cushion material for pillows
A plurality of protrusions are provided on the surface of the cushion material.
The central region including the center in the width direction of the cushion material has lower rigidity than at least a part of the region located outside the width direction of the cushion material with respect to the central region.
According to the cushioning material according to the present invention, when a human head rests on the cushioning material and lies on his back, the human head can be stabilized in the central region. Therefore, the comfort of the cushioning material is improved.

In the cushion material according to the present invention, it is preferable that the surface of the cushion material is provided with a plurality of grooves extending in the length direction of the cushion material.
According to such a configuration, a difference in rigidity in the width direction of the cushion material can be easily generated.

In the cushion material according to the present invention, it is preferable that the distance between the plurality of grooves in the width direction of the cushion material is wider on the outside in the width direction than on the inside in the width direction of the cushion material.
According to such a configuration, a difference in rigidity in the width direction of the cushion material can be easily generated.

In the cushion material according to the present invention, it is preferable that the distance between the plurality of grooves in the width direction of the cushion material is gradually widened from the inside in the width direction to the outside in the width direction of the cushion material.
According to such a configuration, the human head placed on the cushion material can easily move in the width direction of the cushion material.

In the cushion material according to the present invention, each of the plurality of grooves has an opening at a position sandwiched between at least two protrusions arranged in the width direction of the cushion material among the plurality of protrusions. preferable.
According to such a configuration, the human head placed on the cushion material can easily move in the width direction of the cushion material.

In the cushion material according to the present invention, each of the plurality of grooves has a widening portion extending from the opening toward the back surface side of the cushion material, and a cross-sectional view orthogonal to the length direction of the cushion material. The groove width of the widened portion is preferably wider than the groove width of the opening.
According to such a configuration, the cushioning property of the cushion material is improved.

The cushion material according to the present invention preferably includes a slit that penetrates the cushion material in the thickness direction of the cushion material.
According to such a configuration, the air permeability of the cushion material is improved and the cushioning property of the cushion material 1 is improved.

In the cushion material according to the present invention, it is preferable that the slit has a long shape in the length direction of the cushion material.
According to such a configuration, the human head placed on the cushion material can easily move in the width direction of the cushion material.

In the cushion material according to the present invention, it is preferable that the slit is arranged in the central region of the cushion material.
According to such a configuration, it is possible to improve the air permeability of the central region on which the human head is placed when lying on its back.

In the cushion material according to the present invention, it is preferable that the slit has an opening at a position sandwiched between at least two protrusions arranged in the width direction of the cushion material among the plurality of protrusions.
According to such a configuration, the human head placed on the cushion material can easily move in the width direction of the cushion material.

In the cushion material according to the present invention, it is preferable that at least a part of the side surface of the cushion material is provided with a notch groove extending so as to cross the thickness direction of the cushion material.
According to such a configuration, it is possible to improve the fit of the cushion material to the human neck in which the head is placed on the cushion material.

The pillow according to the present invention includes the cushioning material described above.
According to the pillow according to the present invention, the human head can be stabilized in the central region when the human head rests on the pillow and lies on his back. Therefore, the comfort of the pillow is improved.

According to the present invention, it is possible to provide a cushioning material and a pillow that can improve comfort.

FIG. 1 is a surface view showing a cushioning material according to an embodiment of the present invention from the surface side. FIG. 2 is a side view of the cushion material shown in FIG. 1 in the length direction. FIG. 3 is a side view in the width direction of the cushion material shown in FIG. FIG. 4 is an enlarged perspective view showing a part of the surface of the cushion material shown in FIG. 1. FIG. 5 is a surface view showing a plurality of regions included in the cushion material shown in FIG. FIG. 6 is a side view in the width direction of the pillow including the cushion material shown in FIG.

Hereinafter, the cushion material and the pillow according to the embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to common parts and parts in each figure.

FIG. 1 is a surface view showing the cushion material 1 according to the embodiment of the present invention from the surface side. FIG. 2 is a side view of the cushion material 1 shown in FIG. 1 in the length direction. FIG. 3 is a side view in the width direction of the cushion material 1 shown in FIG. In the present specification, the "surface" of the cushion material 1 means a surface that receives a load when a person lies on the cushion material 1. The surface of the cushion material 1 opposite to the front surface is referred to as a back surface. The width direction of the cushion material 1 means one direction on the surface of the cushion material 1. Specifically, the width direction of the cushion material 1 may be substantially the same as the shoulder width direction of the human when the person lies on the cushion material 1. The length direction of the cushion material 1 means a direction orthogonal to the width direction of the cushion material 1. The thickness direction of the cushion material 1 means a direction orthogonal to the width direction and the length direction of the cushion material 1. In the figure, reference numerals W, L, and D are the width direction of the cushion material 1, the length direction of the cushion material 1, and the thickness direction of the cushion material 1, respectively.

In the present embodiment, the cushion material 1 is, for example, a cushion material 1 for a pillow. In the present embodiment, the cushion material 1 will be described as being used to support a human head or the like lying in the length direction of the cushion material 1. However, the cushion material 1 is not limited to pillows, but can also be applied as a cushion material 1 for supporting humans, which is used for mattresses, mattresses, cushions, chairs, and the like. Further, the direction in which the person lies with respect to the cushion material 1 is not limited to the present embodiment.

As shown in FIG. 1, the cushion material 1 is a substantially rectangular flat plate-shaped member in a plan view from the thickness direction of the cushion material 1. In the present embodiment, the cushion material 1 has a configuration symmetrical with respect to the center line CL in the width direction of the cushion material 1. However, the cushion material 1 may have an asymmetrical structure with respect to the center line CL. The center line CL in the width direction of the cushion material 1 is a line that passes through the center in the width direction of the cushion material 1 and extends in the length direction of the cushion material 1.

The cushion material 1 is formed of an elastic foam such as urethane foam. As a result, the air permeability of the cushion material 1 is improved. In the present embodiment, the cushion material 1 is formed of one elastic foam. However, the cushion material 1 may be formed of a plurality of elastic foams. For example, the cushion material 1 may be formed in layers by a plurality of elastic foams that are overlapped and joined to each other in the thickness direction of the cushion material 1.

The cushion material 1 has a plurality of compartments 2 on the surface of the cushion material 1. As shown in FIG. 1, on the surface of the cushion material 1, the plurality of compartments 2 are arranged in a grid pattern along the width direction and the length direction of the cushion material 1 at intervals from each other.

Each section 2 is provided with a protrusion 3. Therefore, the cushion material 1 is provided with a plurality of protrusions 3 arranged in a grid pattern along the width direction and the length direction of the cushion material 1 on the surface of the cushion material 1. In the present embodiment, on the surface of the cushion material 1, a plurality of compartments 2 are arranged side by side in the same number on both sides of the cushion material 1 in the width direction with the center line CL interposed therebetween.

Hereinafter, the protrusions 3 provided in the respective compartments 2 will be described with reference to FIG. FIG. 4 is an enlarged perspective view showing a part of the surface of the cushion material 1 shown in FIG. As shown in FIG. 4, the protrusion 3 has a substantially rectangular bottom surface, and has a rounded substantially quadrangular pyramid shape extending to the upper surface in the thickness direction of the cushion material 1. The upper surface of the protrusion 3 is smaller than the bottom surface. The protrusion 3 supports the head when the human head is placed on the surface of the cushion material 1 by the upper surface of the protrusion 3. Therefore, the cushion material 1 can exert the acupressure effect of the cushion material 1 on humans by the protrusions 3. However, the shape of the protrusion 3 is not limited to a quadrangular pyramid, and may be a shape convex in the thickness direction of the cushion material 1, such as a quadrangular pyramid or a hemisphere.

The cushion material 1 according to the present embodiment has a plurality of regions R having different rigidity in the width direction of the cushion material 1. As shown in FIG. 5, the cushion material 1 has three regions R in the width direction of the cushion material 1. FIG. 5 is a surface view showing a plurality of regions included in the cushion material 1 shown in FIG. The cushion material 1 has three regions R of a first region R1, a second region R2, and a third region R3 from the inside in the width direction of the cushion material 1. In the present embodiment, the area R is associated with the section 2. The first region R1 includes two rows of compartments 2 arranged on both sides of the center line CL in the width direction of the cushion material 1. The second region R2 includes two rows of compartments 2 arranged outside the width direction of the first region R1 in the width direction of the cushion material 1. The third region R3 includes three rows of compartments 2 arranged outside the second region R2 in the width direction in the width direction of the cushion material 1.

The central region including the center line CL in the width direction of the cushion material 1 has lower rigidity than at least a part of the region located outside the width direction of the cushion material 1 with respect to the center region. In the "center region" of the cushion material 1, the length in the width direction of the cushion material 1 is approximately 1/4 to 1/1 of the maximum length in the width direction of the cushion material 1 with the center line CL of the cushion material 1 as the center. There are two areas. In the present embodiment, the first region R1 is the central region. The first region R1, which is the central region of the cushion material 1, has a lower rigidity than the second region R2 and the third region R3 located outside the width direction of the cushion material 1 with respect to the first region R1. More specifically, the rigidity of the cushion material 1 increases stepwise from the inside in the width direction to the outside in the width direction in the order of the first region R1, the second region R2, and the third region R3.

As a result, when the human head rests on the cushion material 1 and lies on his back, the human head is compared with the second region R2 and the third region R3 located outside in the width direction of the cushion material 1. It becomes easy to stabilize in the first region R1 which is the central region of the cushion material 1 having low rigidity.

Further, when the human head is placed on the first region R1 of the cushion material 1 and the posture is changed sideways from the state of lying on the back, the human head is changed from the first region R1 to the second region R2. It moves to the third region R3 via. At that time, since the third region R3 has a higher rigidity than the first region R1, the third region R3 of the cushion material 1 is also in the lateral orientation where the height of the head from the bed surface is higher than when lying on the back. However, it can stably support the human head. As described above, the cushion material 1 can support the human head with different rigidity when the person is lying on his / her back and when he / she is lying on the cushion material 1. Therefore, the comfort of the cushion material 1 is improved.

Further, the rigidity of the cushion material 1 is gradually increased in the order of the first region R1, the second region R2, and the third region R3, so that the human head placed on the cushion material 1 is cushioned. It becomes easy to move in the width direction of the material 1. Therefore, the cushion material 1 can facilitate a person to change his / her posture such as turning over from his / her back to the side or from the side to the back.

The rigidity of the cushion material 1 in the region R may be evaluated by any method. For example, the rigidity of the region R of the cushion material 1 is determined by measuring the magnitude of the rebound resilience of the cushion material 1 when a predetermined force is applied to the region R in the thickness direction of the cushion material 1. It may be evaluated. For example, as a method for measuring the rebound resilience coefficient, for example, the rebound resilience test method specified in JIS K 6400-3 can be mentioned. Alternatively, the rigidity of the region R of the cushion material 1 is evaluated by measuring the change in the thickness of the cushion material 1 in the thickness direction when a predetermined force is applied in the thickness direction of the cushion material 1. May be good. Further, the rigidity in the region R may be evaluated by a representative value at one position of the region R, or may be evaluated by an average value or the like at a plurality of positions of the region R.

Referring to FIG. 1 again, the cushion material 1 is provided with a plurality of grooves 4 extending in the length direction of the cushion material 1 on the surface of the cushion material 1. In the present embodiment, each of the plurality of grooves 4 has an opening 4A at a position sandwiched between at least two compartments 2 arranged in the width direction of the cushion material 1 among the plurality of compartments 2 on the surface of the cushion material 1. Have. That is, each of the plurality of grooves 4 has an opening 4A at a position sandwiched between at least two protrusions 3 arranged in the width direction of the cushion material 1 among the plurality of protrusions 3 on the surface of the cushion material 1. There is. As a result, the protrusion 3 adjacent to the groove 4 is likely to sink to the groove 4 side when pressed by the human head. Thereby, the rigidity of the cushion material 1 in the vicinity of the groove 4 can be reduced. In particular, since the groove 4 extends in the length direction of the cushion material 1, the human head placed on the cushion material 1 moves in the width direction of the cushion material 1 due to a person turning over or the like. At that time, the rigidity of the cushion material 1 in the vicinity of the groove 4 can be reduced. Therefore, the human head placed on the cushion material can easily move in the width direction of the cushion material. Further, the groove 4 can function as a ventilation groove that opens on the surface of the cushion material 1 and penetrates both side surfaces of the cushion material 1 in the length direction. Therefore, the groove 4 can improve the air permeability of the cushion material 1 and cause a difference in rigidity of the cushion material 1 in the width direction.

As shown in FIG. 2, the plurality of grooves 4 are composed of an opening 4A and a widening portion 4B extending from the opening 4A toward the back surface side of the cushion material 1. The groove width W2 of the widening portion 4B is wider than the groove width W1 of the opening 4A in a cross-sectional view orthogonal to the extending direction of the groove 4 (in the present embodiment, the length direction of the cushion material 1). Here, the groove width W1 of the opening 4A and the groove width W2 of the widening portion 4B mean the maximum values of the groove width of the opening 4A and the groove width of the widening portion 4B, respectively. The shape of the cross section of the widening portion 4B orthogonal to the extending direction of the groove 4 is preferably elliptical. By having such a configuration, the cushion material 1 is less likely to crack on the inner wall surface of the widening portion 4B.

The interval in the width direction of the cushion material 1 of the plurality of grooves 4 is wider in the width direction outside than in the width direction inside of the cushion material 1. More specifically, the distance between the plurality of grooves 4 in the width direction of the cushion material 1 is gradually widened from the inside in the width direction to the outside in the width direction of the cushion material 1. In the present embodiment, the rows of protrusions 3 sandwiched between the two grooves 4 adjacent to each other in the width direction of the cushion material 1 are gradually arranged in one row, two rows, and three rows from the center line CL toward the outside in the width direction. It's getting wider.

In the cushion material 1 according to the present embodiment, the above-mentioned region R and the distance between the grooves 4 are associated with each other. In the first region R1 including the center line CL, two grooves 4 adjacent to each other in the width direction of the cushion material 1 are provided so as to sandwich a row of protrusions 3. In the second region R2, two grooves 4 adjacent to each other in the width direction of the cushion material 1 are provided so as to sandwich the two rows of protrusions 3. In the third region R3, two grooves 4 adjacent to each other in the width direction of the cushion material 1 are provided so as to sandwich the three rows of protrusions 3. When the number of grooves 4 with respect to the length in the width direction of the cushion material 1 in the region R increases, the protrusions 3 provided in the region R tend to sink in the thickness direction of the cushion material 1. Therefore, as the number of grooves 4 with respect to the length of the cushion material 1 in the width direction in the region R increases, the rigidity of the cushion material 1 decreases. Therefore, the first region R1 of the cushion material 1 has a lower rigidity than the second region R2 and the third region R3. More specifically, the rigidity of the cushion material 1 increases stepwise from the inside in the width direction to the outside in the width direction in the order of the first region R1, the second region R2, and the third region R3.

The shape and spacing of the grooves 4 are not limited to the above-mentioned examples, and may be arbitrarily determined according to the rigidity requirements of the cushion material 1. In the present embodiment, the shapes of the cross sections of the grooves 4 in the cross-sectional view orthogonal to the length direction of the cushion material 1 are all the same. However, the cross-sectional shape of the groove 4 does not have to be the same. For example, by making the area of the cross section of the groove 4 provided in a part of the cushion material 1 larger than the area of the cross section of the groove 4 provided in the other area, the rigidity of a part of the area can be increased. It may be smaller than the area of.

With reference to FIG. 1 again, the cushion material 1 is provided with a plurality of grooves 5 extending in the width direction of the cushion material 1 on the surface of the cushion material 1. In the present embodiment, each of the plurality of grooves 5 has an opening 5A on the surface of the cushion material 1 at a position sandwiched between at least two compartments 2 arranged in the length direction of the cushion material 1 among the plurality of compartments 2. have. That is, each of the plurality of grooves 5 has an opening 5A at a position sandwiched between at least two protrusions 3 arranged in the length direction of the cushion material 1 among the plurality of protrusions 3 on the surface of the cushion material 1. ing. As a result, the protrusion 3 adjacent to the groove 5 tends to sink to the groove 5 side when pressed by the human head. Further, the groove 5 can function as a ventilation groove that opens on the surface of the cushion material 1 and penetrates both side surfaces of the cushion material 1 in the width direction.

As shown in FIG. 3, the plurality of grooves 5 are composed of an opening 5A and a widening portion 5B extending from the opening 5A toward the back surface side of the cushion material 1. The groove width W4 of the widening portion 5B is wider than the groove width W3 of the opening 5A in a cross-sectional view orthogonal to the extending direction of the groove 5 (the width direction of the cushion material 1 in the present embodiment). Here, the groove width W3 of the opening 5A and the groove width W4 of the widening portion 5B of the groove 5 mean the maximum values of the groove width of the opening 5A and the groove width of the widening portion 5B, respectively. The shape of the cross section of the widening portion 5B orthogonal to the extending direction of the groove 5 is preferably elliptical. By having such a configuration, the cushion material 1 is less likely to crack on the inner wall surface of the widening portion 5B.

In the present embodiment, the intervals of the cushioning materials 1 of the plurality of grooves 5 in the length direction are equal. Specifically, the plurality of grooves 5 are provided so as to sandwich the two rows of protrusions 3 in the length direction of the cushion material 1.

In the present embodiment, the cross-sectional shape of the groove 5 in the cross-sectional view orthogonal to the length direction of the cushion material 1 is the same as the cross-sectional shape of the groove 4. However, the shape of the cross section of the groove 5 does not have to be the same as the shape of the cross section of the groove 4.

Referring to FIG. 1 again, the cushion material 1 includes a slit 6 that penetrates the cushion material 1 in the thickness direction of the cushion material 1. The slit 6 opens on each of the front surface and the back surface of the cushion material 1 and can function as a vent that penetrates the cushion material 1 in the thickness direction.

In the present embodiment, the slit 6 is arranged in the first region R1 which is the central region of the cushion material 1. Since the slit 6 is provided in the first region R1, the first region R1 tends to sink in the thickness direction of the cushion material 1. That is, the slit 6 has the effect of reducing the rigidity of the first region R1. As a result, the first region R1, which is the central region of the cushion material 1, has a lower rigidity than at least a part of the region located outside the width direction of the cushion material 1 with respect to the central region. Therefore, the slit 6 can improve the air permeability of the cushion material 1 and cause a difference in rigidity of the cushion material 1 in the width direction.

The slit 6 is provided in the central portion of the first region R1. Specifically, in the first region R1, one slit 6 is provided at a position on the center line CL, and two slits 6 are provided at a position outside the center line CL in the width direction. This improves the air permeability of the central region of the cushion material 1 on which the human head is placed when lying on its back.

The slit 6 has a long shape in the length direction of the cushion material 1 in a plan view from the thickness direction of the cushion material 1. More specifically, each slit 6 is located between a plurality of protrusions 3 and at least two protrusions 3 arranged in the width direction of the cushion material 1 in a plan view from the thickness direction of the cushion material 1. Has an opening 6A. As a result, the protrusion 3 adjacent to the slit 6 is likely to sink to the slit 6 side. Therefore, in the cushion material 1, the human head placed on the cushion material 1 easily moves in the width direction of the cushion material 1. Therefore, the cushion material 1 can facilitate a person to change his / her posture such as turning over from his / her back to the side or from the side to the back. However, the shape of the slit 6 may be any shape such as a circular shape, a long shape in the width direction, and a cross shape. At that time, the shape of the cross section of the slit 6 orthogonal to the thickness direction of the cushion material 1 is preferably a circular shape or an elliptical shape. By having such a configuration, the cushion material 1 is less likely to crack on the inner wall surface of the slit 6.

In the present embodiment, the slit 6 is provided at a position on the surface of the cushion material 1 at the intersection of the groove 4 extending in the length direction and the groove 5 extending in the width direction. Thereby, the slit 6 can improve the air permeability of the groove 4 and the groove 5.

As shown in FIGS. 2 and 3, at least a part of the side surface of the cushion material 1 is provided with a notch groove 7 extending so as to cross the thickness direction of the cushion material 1. In the present embodiment, a notch groove 7 extending substantially orthogonal to the thickness direction of the cushion material 1 is provided over all the side surfaces of the cushion material 1.

In particular, among the side surfaces of the cushion material 1, the human neck is located on the side surface of the cushion material 1 in the length direction when the human head is placed on the cushion material 1. As a result, when the human head is placed on the cushion material 1, the side surface of the cushion material 1 can sink to the notch groove 7 side so as to follow the shape of the human neck. The notch groove 7 can improve the fit of the cushion material 1 to the human neck in which the head is placed on the cushion material 1.

Further, when the pillow cover covering the cushion material 1 is attached to the cushion material 1, the side surface of the cushion material 1 can sink into the notch groove 7 side according to the shape of the pillow cover. Therefore, the notch groove 7 has the effect of increasing the variation of the pillow cover that can be attached to the cushion material 1.

Hereinafter, an embodiment of the pillow 10 including the cushion material 1 described above will be described. The cushion material 1 may be used alone as a pillow. Alternatively, the cushion material 1 may be used as a pillow 10 in combination with another unit 11. FIG. 6 is a side view in the width direction of the pillow 10 including the cushion material 1 shown in FIG. In FIG. 6, the width direction, the length direction, and the thickness direction of the pillow 10 are the same as the width direction, the length direction, and the thickness direction of the cushion material 1, respectively. As shown in FIG. 6, the pillow 10 is composed of the cushion material 1 and the other unit 11 stacked in the thickness direction of the cushion material 1 and the pillow cover 12 covering the cushion material 1 and the other unit 11. ing.

The other unit 11 is a bag-shaped member filled with an arbitrary material such as urethane foam, cotton, sponge, pipe, and buckwheat husk.

The cushion material 1 is stacked so that the back surface of the cushion material 1 opposes the other units 11. Thereby, the surface of the cushion material 1 can support the human head placed on the pillow 10. By having such a configuration, the effect of the cushion material 1 is exhibited in the pillow 10. Therefore, the cushion material 1 can improve the comfort of the pillow 10 as compared with the case where the other unit 11 is used alone as a pillow.

As described above, the cushion material 1 according to the embodiment of the present invention is a cushion material for pillows. A plurality of protrusions 3 are provided on the surface of the cushion material 1. The central region including the center in the width direction of the cushion material 1 has lower rigidity than at least a part of the region located outside the width direction of the cushion material 1 with respect to the central region. According to the cushion material 1 having such a configuration, the cushion material 1 can stabilize the human head in the central region when the human head rests on the cushion material 1 and lies on his back. Therefore, the comfort of the cushion material 1 is improved.

In the cushion material 1 according to the embodiment of the present invention, it is preferable that the surface of the cushion material 1 is provided with a plurality of grooves 4 extending in the length direction of the cushion material 1. According to such a configuration, a difference in rigidity in the width direction of the cushion material 1 can be easily generated.

In the cushion material 1 according to the embodiment of the present invention, it is preferable that the distance between the plurality of grooves 4 in the width direction of the cushion material 1 is wider in the width direction outside than in the width direction inside of the cushion material 1. According to such a configuration, the rigidity inside the cushion material 1 in the width direction can be made smaller than the rigidity outside in the width direction. Therefore, a difference in rigidity in the width direction of the cushion material 1 can be easily generated.

In the cushion material 1 according to the embodiment of the present invention, the distance between the plurality of grooves 4 in the width direction of the cushion material 1 is gradually widened from the inside in the width direction to the outside in the width direction of the cushion material 1. Is preferable. According to such a configuration, the human head placed on the cushion material 1 can easily move in the width direction of the cushion material 1.

In the cushion material 1 according to the embodiment of the present invention, each of the plurality of grooves 4 has an opening 4A at a position sandwiched between at least two protrusions 3 arranged in the width direction of the cushion material 1 among the plurality of protrusions 3. It is preferable to have. According to such a configuration, the protrusion 3 adjacent to the groove 4 is likely to sink into the groove 4 side. Therefore, the human head placed on the cushion material 1 can easily move in the width direction of the cushion material 1.

In the cushion material 1 according to the embodiment of the present invention, the plurality of grooves 4 have widening portions 4B extending from the opening 4A toward the back surface side of the cushion material 1 in the length direction of the cushion material 1. In an orthogonal cross-sectional view, the groove width of the widening portion 4B is preferably wider than the groove width of the opening 4A. According to such a configuration, the vicinity of the groove 4 on the surface of the cushion material 1 is more likely to sink into the groove 4 side, and the cushioning property of the cushion material 1 is improved. Therefore, the comfort of the cushion material 1 is further improved.

The cushion material 1 according to the embodiment of the present invention preferably includes a slit 6 that penetrates the cushion material 1 in the thickness direction of the cushion material 1. According to such a configuration, the air permeability of the cushion material 1 is improved, and the cushioning property of the cushion material 1 is improved. Therefore, the comfort of the cushion material 1 is further improved.

In the cushion material 1 according to the embodiment of the present invention, the slit 6 preferably has a long shape in the length direction of the cushion material 1. According to such a configuration, the vicinity of the slit 6 on the surface of the cushion material 1 is likely to sink to the slit 6 side. Therefore, the human head placed on the cushion material 1 can easily move in the width direction of the cushion material 1.

In the cushion material 1 according to the embodiment of the present invention, the slit 6 is preferably arranged in the central region of the cushion material 1. According to such a configuration, it is possible to reduce the rigidity of the central region of the cushion material 1 on which the human head is placed when lying on the back and improve the air permeability of the central region.

In the cushion material 1 according to the embodiment of the present invention, the slit 6 has an opening 4A at a position sandwiched between at least two protrusions 3 arranged in the width direction of the cushion material 1 among the plurality of protrusions 3. It is preferable to have. According to such a configuration, the protrusion 3 adjacent to the slit 6 is likely to sink to the slit 6 side. Therefore, the human head placed on the cushion material 1 can easily move in the width direction of the cushion material 1.

In the cushion material 1 according to the embodiment of the present invention, it is preferable that at least a part of the side surface of the cushion material 1 is provided with a notch groove 7 extending so as to cross the thickness direction of the cushion material 1. According to this configuration, when the human head is placed on the cushion material 1, the side surface of the cushion material 1 can sink to the notch groove 7 side so as to follow the shape of the human neck. .. Therefore, it is possible to improve the fit of the cushion material 1 to the human neck in which the head is placed on the cushion material 1.

The pillow 10 according to an embodiment of the present invention includes the cushion material 1 described above. According to the pillow 10 having such a configuration, the human head can be supported with different rigidity when the person is lying on his / her back and when he / she is lying on the pillow 10. Therefore, the comfort of the pillow 10 is improved.

Although the present invention has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present invention. Therefore, it should be noted that these modifications and modifications are within the scope of the present invention. For example, the configurations or functions included in each embodiment or each embodiment can be rearranged so as not to be logically inconsistent. Further, the configurations or functions included in each embodiment can be used in combination with other embodiments or other examples, and a plurality of configurations or functions can be combined into one, divided into one, or one. It is possible to omit the part.

For example, in the above-described embodiment, the cushion material 1 has been described as being a substantially rectangular flat plate-shaped member in a plan view from the thickness direction of the cushion material 1. However, the cushion material 1 may be a flat plate-shaped member having an arbitrary shape such as an ellipse or a polygon in a plan view from the thickness direction of the cushion material 1.

Further, for example, in the above-described embodiment, the cushion material 1 has been described as having three regions R1, R2, and R3 having different rigidity in the width direction of the cushion material 1. However, the number of regions R having different rigidity that the cushion material 1 has in the width direction of the cushion material 1 may be arbitrarily determined.

Further, for example, in the above-described embodiment, it is assumed that a difference in rigidity in the width direction of the cushion material 1 occurs depending on the distance between the grooves 4 in the width direction of the cushion material 1, the position of the slit 6 in the cushion material 1, or a combination thereof. explained. However, the difference in rigidity of the cushion material 1 in the width direction may be realized by any method such as a difference in material, a difference in thickness, or a difference in the cross-sectional shape of the groove 4 in the width direction of the cushion material 1. .. For example, by increasing the cross-sectional area of the groove 4 provided on the inner side in the width direction with respect to the groove 4 provided on the outer side in the width direction of the cushion material 1, the rigidity inside the width direction is made smaller than the rigidity outside the width direction. You may.

1: Cushion material, 2: Section, 3: Protrusion, 4: Groove, 4A: Opening, 4B: Widening part, 5: Groove, 5A: Opening, 5B: Widening part, 6: Slit, 7: Notch groove, 10: Pillow, 11: Other unit, 12: Pillow cover, R: Area, R1: 1st area, R2: 2nd area, R3: 3rd area, W: Width direction, L: Length direction, D: Thickness direction

Claims (12)

Cushion material for pillows
A plurality of protrusions are provided on the surface of the cushion material.
A cushion material having a central region including a center in the width direction of the cushion material having a lower rigidity than at least a part of the region located outside the center region in the width direction of the cushion material. The cushioning material according to claim 1, wherein the surface of the cushioning material is provided with a plurality of grooves extending in the length direction of the cushioning material. The cushion material according to claim 2, wherein the distance between the plurality of grooves in the width direction of the cushion material is wider on the outside in the width direction than on the inside in the width direction of the cushion material. The cushion material according to claim 3, wherein the distance between the plurality of grooves in the width direction of the cushion material is gradually widened from the inside in the width direction to the outside in the width direction of the cushion material. Any one of claims 2 to 4, wherein each of the plurality of grooves has an opening at a position sandwiched between at least two protrusions arranged in the width direction of the cushion material among the plurality of protrusions. Cushion material described in the section. Each of the plurality of grooves has a widening portion extending from the opening toward the back surface side of the cushion material.
The cushion material according to claim 5, wherein the groove width of the widened portion is wider than the groove width of the opening in a cross-sectional view orthogonal to the length direction of the cushion material. The cushioning material according to any one of claims 1 to 6, further comprising a slit that penetrates the cushioning material in the thickness direction of the cushioning material. The cushion material according to claim 7, wherein the slit has a long shape in the length direction of the cushion material. The cushion material according to claim 7 or 8, wherein the slit is arranged in the central region of the cushion material. The slit according to any one of claims 7 to 9, wherein the slit has an opening at a position sandwiched between at least two protrusions arranged in the width direction of the cushion material among the plurality of protrusions. Cushion material. The cushion material according to any one of claims 1 to 10, wherein at least a part of the side surface of the cushion material is provided with a notch groove extending so as to cross the thickness direction of the cushion material. A pillow comprising the cushioning material according to any one of claims 1 to 11.

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