JP7401873B2 - pillow - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Website publication date August 29, 2020 Website address https://www. airsleep. jp/pdf/20190829. pdf https://www. airsleep. jp/lineup/pillow4dx. html https://www. nishikawasangyo. co. jp/categories/pillow/pi70370/ [Publications, etc.] Publication date November 27, 2020 Publications Nishikawa Co., Ltd. "AiR CONDITIONING GEAR LINE UP CATALOG" pages 22 and 23 [Publications, etc.] Sales date or distribution Date July 19, 2020 Sales location or distribution location Mitsukoshi Isetan Co., Ltd. Isetan Shinjuku Main Store 5th floor (3-14-1 Shinjuku, Shinjuku-ku, Tokyo)

The present disclosure relates to a pillow on which a user's head rests.

Various types of pillows have been known in the past. Utility Model Registration No. 3222323 discloses a first elastic member disposed on the surface side of the pillow, a sheet-shaped second elastic member disposed inside the first elastic member on the bottom side of the pillow, A pillow is described that includes a first elastic member and a sheet-like third elastic member disposed between the second elastic member. The first elastic member has a plurality of protrusions located on the front surface side and a connecting part located below the plurality of protrusions.

The upper part of the protrusion is made of low-resilience foam, and the lower part of the protrusion and the connection part are made of soft urethane foam. The third elastic member is made of polyurethane foam, and the second elastic member located at the bottom is made of urethane foam that is harder than the first elastic member and the third elastic member. In this pillow, the user's head is supported at a plurality of points by the plurality of convex portions of the first elastic member, thereby improving ventilation in the user's head.

Utility model registration No. 3222323

The pillow described above is designed to improve air permeability in the user's head by the plurality of convex portions of the first elastic member located on the surface side. However, the second elastic member and the third elastic member located below the first elastic member are made of sheet-like urethane foam, and the second elastic member and the third elastic member are configured to ensure air permeability. It has not been said that. Therefore, there is room for improvement in terms of air permeability.

The present disclosure aims to provide a pillow that can improve breathability.

The pillow according to the present disclosure is made of a flexible material that extends in a first direction and a second direction that intersects the first direction, and has a thickness in a third direction that intersects both the first direction and the second direction. The pillow includes a surface layer directed vertically upward, a bottom layer directed vertically downward, and a gel layer interposed between the surface layer and the bottom layer, and in an outer edge portion in a plan view, the surface layer is attached to the bottom layer, and the surface layer is separated from the gel layer via a space in a region including the center in plan view and other than the outer edge portion, and the bottom layer is The gel layer has a first recess depressed vertically downward in a region including the center, the gel layer has a second recess formed following the first recess, and the bottom depth of the second recess is 2 cm or more; It is 10 cm or less .

This pillow includes a surface layer facing vertically upward, a bottom layer facing vertically downward, and a gel layer interposed between the surface layer and the bottom layer, and the surface layer, bottom layer, and gel layer are made of flexible material. It is made up of. The gel layer is soft and has high body pressure dispersibility and high thermal conductivity, and also exhibits a high cooling sensation. Therefore, when a user's head is placed on this pillow, the gel layer comes into contact with the head via the surface layer, thereby providing the user with a high level of cushioning and a high cooling sensation. In this pillow, the surface layer is bonded to the bottom layer at the outer edge portion in plan view, and the surface layer is separated from the gel layer via a space in the center portion in plan view. Therefore, in the central portion in plan view, the surface layer is not bonded and is floating from the gel layer via the space. Therefore, when the user's head is placed on the central portion of the pillow in plan view, the surface layer deforms greatly, giving the user a feeling of high cushioning properties. Furthermore, when the surface layer deforms under the load of the head, air in the space escapes to the outside of the pillow through the surface layer, thereby improving breathability. Then, when the load of the head on the surface layer is released, the deformation of the surface layer returns to its original state and a space is formed again. Therefore, by repeatedly deforming the surface layer in the space, it is possible to promote air flow to the pillow, thereby improving cushioning properties and breathability. In addition, by improving breathability, the temperature of the gel layer that warms up when it comes into contact with the head can be lowered.

The gel layer may have grooves on the upper surface facing the surface layer side. In this case, since the groove is formed on the upper surface of the gel layer, the groove can be used as an air flow path on the upper surface of the gel layer. That is, it is possible to make it easier for air to flow through the grooves on the upper surface of the gel layer, so that air permeability can be further improved. In addition, by improving breathability, the temperature of the gel layer that warms up when it comes into contact with the head can be lowered.

The gel layer may have a first through hole extending in the third direction, and the bottom layer may have a second through hole that communicates with the first through hole and opens vertically downward. In this case, the first through hole and the second through hole form a through hole extending from the top surface of the gel layer to the bottom surface of the bottom layer, so that the air permeability from the gel layer to the bottom layer can be further improved. Therefore, it is possible to prevent heat from being trapped inside the pillow.

Since the depth of the second recess formed in the area including the center of the gel layer in plan view is 2 cm or more, it is possible to ensure a large volume of the space formed between the surface part and the gel layer. This contributes to further improvement of breathability. Further, by setting the depth of the second recess to 10 cm or less, it is possible to avoid the second recess from becoming too deep and giving a sense of discomfort to the user.

The surface layer has a center portion located at the center in the first direction and both side portions located on both sides of the center portion in the first direction, and the both side portions are oriented vertically upward and have a rectangular shape in plan view. The central part includes a central protrusion that is oriented vertically upward and has a rectangular shape in plan view, and the width of the central protrusion is wider than the width of the protrusions on both sides. It may also be narrow. In this case, the width of the central protrusion located at the center of the pillow is narrower than the width of the protrusions on both sides. Therefore, by narrowing the width of the central convex portion, it is possible to more easily follow the shape of the central portion when the user's head is placed on it. In other words, when the width of the central convex part is narrow, more of the central convex parts can be deformed more flexibly according to the shape of the user's head, so the connection between the central part of the surface layer and the space is reduced. Air circulation can be further promoted. Therefore, it contributes to further improvement of air permeability.

The gel layer has a first thin part located at the center in the first direction, a second thin part located at each end in the first direction, and a thickness located between the first thin part and the second thin part. It may also have a part. In this case, the thick portion is provided between the first thin portion located at the center in the first direction and the second thin portion located at each end in the first direction. Therefore, by providing the thick part of the gel layer between the center and both ends in the first direction, when the user's cheek is placed against the thick part, the user is provided with higher cushioning properties and a cooler feeling. It can make you feel.

According to the present disclosure, breathability can be improved.

FIG. 1 is a plan view showing a pillow according to an embodiment. 2 is a bottom view showing the bottom layer of the pillow of FIG. 1. FIG. FIG. 3 is a diagram showing the back side of the surface layer in the pillow of FIG. 1. FIG. 4 is a plan view showing the gel layer and bottom layer of the pillow of FIG. 1. 5(a) is a plan view schematically showing the gel layer of FIG. 4. FIG. FIG. 5(b) is a side view showing the thickness of the gel layer in FIG. 5(b). FIG. 6 is a cross-sectional view taken along line AA in FIG.

Hereinafter, embodiments of a pillow according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted as appropriate. Furthermore, for ease of understanding, some parts of the drawings may be simplified or exaggerated, and the dimensional ratios and the like are not limited to those shown in the drawings.

FIG. 1 is a plan view showing a pillow 1 according to an embodiment. As shown in FIG. 1, the pillow 1 has a pair of long sides 1b extending in a first direction D1 and a pair of short sides 1c extending in a second direction D2 intersecting the first direction D1. The pillow 1 has a thickness in a third direction D3 (see FIG. 6) that intersects both the first direction D1 and the second direction D2. The first direction D1 is, for example, the longitudinal direction of the pillow 1, and the second direction D2 is the lateral direction of the pillow 1. As an example, the first direction D1 and the second direction D2 are orthogonal to each other. The third direction D3 is, for example, a vertical direction.

The pillow 1 is used, for example, while being housed in a cover for stain prevention. The pillow 1 has a shape that is symmetrical with respect to a reference line L1 that is the center of the pillow 1 in the second direction D2 and extends in the first direction D1. In this way, since the pillow 1 has a symmetrical shape with respect to the reference line L1, even if the pillow 1 is used with its orientation toward the second direction D2 reversed, the pillow 1 will remain in the same shape as before reversing. 1 can be used. For example, the height of one side of the pillow 1 in the second direction D2 may be different from the height of the other side of the pillow 1 in the second direction D2. In this case, the orientation of the pillow 1 in the second direction D2 can be changed to suit the shape of the user's neck.

The pillow 1 has, for example, a shape that is symmetrical with respect to a reference line L2 that is at the center of the pillow 1 in the first direction D1 and extends in the second direction D2. The pillow 1 has, for example, a butterfly shape in plan view. That is, the long side 1b of the pillow 1 is curved and inclined with respect to the first direction D1 in a direction that moves away from the reference line L1 toward both ends in the first direction D1.

The pillow 1 includes, for example, a central portion 2 located at the center in the first direction D1, and a pair of side portions 3 located at each end of the central portion 2. The pair of side portions 3 are, for example, shaped symmetrically with respect to the reference line L2. The central portion 2 is, for example, a region on which the neck and back of the head of a user lying on his back are placed. Both sides 3 are areas on which the temporal region and cheeks of a user who sleeps sideways are placed.

FIG. 2 shows the bottom part of the pillow 1. As shown in FIGS. 1 and 2, the pillow 1 includes a surface layer 10 directed vertically upward, a bottom layer 20 directed vertically downward, and a gel layer 30 interposed between the surface layer 10 and the bottom layer 20. (See FIG. 4). The surface layer 10 is attached to the bottom layer 20, for example, while covering the entire upper surface of the bottom layer 20 and surrounding the outside of the side surface 25 facing each of the first direction D1 and the second direction D2 of the bottom layer 20. . That is, the portion of the bottom layer 20 other than the lower surface 20d is surrounded by the surface layer 10.

In the pillow 1, the surface layer 10 is bonded to the bottom layer 20 at the outer edge portion 1d in plan view. For example, an adhesive portion P between the surface layer 10 and the bottom layer 20 is formed at the outer edge portion 1d of the pillow 1 in plan view. The area inside the adhesive part P of the pillow 1 in plan view is, for example, an area where the surface layer 10 and the bottom layer 20 are not bonded to each other. For example, the gel layer 30 is provided in the area where the bonding is not performed.

The surface layer 10, the bottom layer 20, and the gel layer 30 are all made of a flexible material. For example, the surface layer 10 has a first layer 11 located on the front side of the pillow 1 and a second layer 12 that corresponds to the back side (lower side) of the first layer 11. The first layer 11 forms a plurality of convex portions 13 arranged in a grid pattern.

For example, the convex portion 13 has a quadrangular pyramid shape having an apex and four inclined surfaces that slope diagonally downward from the apex. The first layer 11 is made of, for example, filmless urethane foam. In this case, since the membraneless urethane foam has high air permeability, it contributes to improving the air permeability of the surface layer 10. The second layer 12 is made of, for example, urethane foam having a rebound resilience of 15% to 50%.

The convex portion 13 is formed, for example, by two-dimensional cutting of urethane foam. This convex portion 13 allows the pillow 1 to have excellent body pressure dispersion properties. The convex portion 13 includes a central convex portion 13 b disposed at the center portion 2 and both side convex portions 13 c disposed on both side portions 3 . For example, in plan view, the both side convex portions 13c have a square shape, and the center side convex portion 13b has a rectangular shape with long sides along the second direction D2.

The width of both side convex portions 13c in plan view is wider than the width of center side convex portion 13b in plan view. This makes it possible for the user to feel a soft sensation when he or she turns over and sleeps on his or her side. The width of the central convex portion 13b is narrower than the width of the both side convex portions 13c. Thereby, when the user's head is placed on the center portion 2, it is possible to easily make the shape of the plurality of center side convex portions 13b follow the shape of the head.

Specifically, since the width of the central convex portion 13b is narrower than the width of the both side convex portions 13c, the shape of the plurality of central convex portions 13b when the head is placed becomes closer to the shape of the head. . Since the width of the central convex portion 13b is narrower than the width of the both side convex portions 13c, the density of the central convex portion 13b can be increased, thereby increasing the durability of the central portion 2 and reducing the feeling of bottoming out. can.

The central portion 2 includes a central region 2A located at the center in the second direction D2, and both side regions 2B located at both ends in the second direction D2. As an example, 66 (6×11) central convex portions 13b are formed in the central region 2A, and 44 (4×11) central convex portions 13b are formed in both side regions 2B. A part of the central convex portion 13b of both side regions 2B wraps around in the side surface direction of the surface layer 10 in the second direction D2.

A recess 14 extending along the first direction D1 is formed between the central region 2A and both side regions 2B, and the second layer 12 is exposed in the recess 14. A plurality of through holes 15 are formed in the recess 14 to penetrate the surface layer 10 in the third direction D3. The through holes 15 ensure air permeability of the surface layer 10 in the third direction D3.

As an example, a through hole 15 is formed on the second direction D2 side of the central convex portion 13b. In the central portion 2, the interval between the through holes 15 arranged along the first direction D1 is, for example, twice the interval between the central protrusions 13b arranged along the first direction D1. The plurality of through holes 15 include an elongated hole 15b extending in the second direction D2, and a wide hole 15c having a longer length in the first direction D1 than the elongated hole 15b.

The both side portions 3 include a central region 3A located at the center in the second direction D2, and both side regions 3B located at both ends in the second direction D2. As an example, in the central region 3A, 54 (6×9) both-side convex portions 13c are formed, and in the both-side region 3B, 36 (4×9) both-side convex portions 13c are formed. Some of the both-side convex portions 13c extend around the side surfaces of the surface layer 10 in the first direction D1 and the second direction D2.

A recess 14 is formed between the central region 3A and both side regions 3B. In both side parts 3, the interval between through holes 15 lined up along the first direction D1 is, for example, the same as the interval between the side convex parts 13c lined up along the first direction D1. That is, the number of through holes 15 in both side parts 3 is greater than the number of through holes 15 in central part 2, for example, twice the number of through holes 15 in central part 2.

FIG. 3 is a plan view showing the back side (lower side, opposite side to the first layer 11) of the second layer 12. As shown in FIGS. 1 and 3, for example, each of the elongated hole 15b and the wide hole 15c forms a groove 12c extending in the second direction D2 on the back surface 12b of the second layer 12. A groove 12c extending in the second direction D2 is formed on the back side of the central protrusion 13b.

The groove 12c includes a narrow groove 12d located on the back side of the long hole 15b and a thick groove 12f located on the back side of the wide hole 15c. Further, a plurality of lateral grooves 12g extending along the first direction D1 are formed on the back surface 12b of the second layer 12. In this way, the back surface 12b of the second layer 12 has a plurality of grooves 12c extending along the second direction D2 and a plurality of lateral grooves 12g extending along the first direction D1, which are arranged in a grid pattern. A plurality of convex portions 12h are formed.

FIG. 4 is a plan view showing the bottom layer 20 and the gel layer 30 (the pillow 1 with the surface layer 10 removed). As shown in FIG. 4, the bottom layer 20 has a first recess 51 (see FIG. 6) depressed in the center in plan view, and the gel layer 30 has a second recess formed following the first recess 51. 52. Below, the first recess 51 and the second recess 52 will be collectively referred to as the recess 50.

For example, the depth of the recess 50 increases from the outer edge of the bottom layer 20 and the gel layer 30 toward the center in a plan view. The recess 50 is, for example, curved in a spherical shape. The bottom layer 20 is made of, for example, molded urethane foam. For example, the bottom layer 20 is harder than the top layer 10. Thereby, the user's head placed on the surface layer 10 can be firmly supported on the bottom layer 20. The shape of the bottom layer 20 in a plan view is, for example, a butterfly shape, and the shape of the gel layer 30 in a plan view is also a butterfly shape.

The gel layer 30 is attached to the top surface 20c of the bottom layer 20 by a film F. The material of the gel layer 30 is, for example, urethane gel. As an example, the gel layer 30 is produced by pouring liquid urethane gel onto the film F and solidifying the urethane gel.

The gel layer 30 has high body pressure dispersion and high coolness, and it is possible to obtain a cool sensation by touching the gel layer 30. In this embodiment, the film F used when producing the gel layer 30 is also used as the film F to be attached to the bottom layer 20, and the film F is effectively utilized.

As shown in FIGS. 2 and 4, the gel layer 30 has a first through hole 41 penetrating in the third direction D3, and the bottom layer 20 has a second through hole 42 penetrating in the third direction D3. The second through hole 42 is open to the lower surface 20d of the bottom layer 20. The first through hole 41 and the second through hole 42 communicate with each other, and the first through hole 41 is located above the second through hole 42 . The positions of the first through hole 41 and the second through hole 42 in plan view are the same. Below, the first through hole 41 and the second through hole 42 will be collectively referred to as the through hole 40.

The number of through holes 40 is, for example, 10 or more and 50 or less, or may be 20 or more and 40 or less. In the bottom layer 20 and the gel layer 30, the plurality of through holes 40 are, for example, arranged in a dispersed manner. In the present disclosure, "multiple penetrating holes are distributed and placed" means that multiple penetrating holes are arranged in a staggered, multiple penetrating holes are arranged in a grid. This includes a state in which holes are arranged radially and a state in which a plurality of through holes are arranged concentrically. In this embodiment, each of the plurality of through holes 40 is arranged at the intersection X of the plurality of grooves 32 formed in the upper surface 31 of the gel layer 30.

FIG. 5A is a plan view showing the arrangement of the grooves 32 and the through holes 40 on the upper surface 31 of the gel layer 30. FIG. FIG. 5(b) is a diagram showing the thickness (length in the third direction D3) of each portion of the gel layer 30. As shown in FIGS. 5(a) and 5(b), the groove 32 includes a first groove 32b extending in the first direction D1 and a plurality of second grooves 32c extending in the second direction D2. . A through hole 40 is formed in a part of the plurality of intersections X of the first groove 32b and the second groove 32c. The shape of the through hole 40 in plan view is circular.

For example, a plurality of first grooves 32b are lined up along the second direction D2. One of the plurality of first grooves 32b extends linearly along the reference line L1. The remaining plurality of first grooves 32b are curved toward both ends in the second direction D2 as they go toward both ends in the first direction D1 of the gel layer 30.

The first groove 32b located at the end of the gel layer 30 in the second direction D2 extends following the butterfly shape of the gel layer 30. The number of first grooves 32b is, for example, seven. Each of the plurality of second grooves 32c extends, for example, along the second direction D2. The interval between the second grooves 32c arranged along the first direction D1 becomes wider from the center of the gel layer 30 in the first direction D1 toward the end side. The number of second grooves 32c is, for example, thirteen.

As described above, by arranging the first grooves 32b and the second grooves 32c, the gel layer 30 has a lattice-shaped convex portion 33 defined by the first grooves 32b and the second grooves 32c. has been done. The convex portion 33 indicates a portion of the gel layer 30 that is thicker than the portion where the groove 32 is formed. The convex portions 33 are arranged, for example, along each of the first direction D1 and the second direction D2. The width of the convex portion 33 (the length in the first direction D1) increases from the center of the gel layer 30 in the first direction D1 toward the end side.

The convex portion 33 includes a plurality of first thin portions 34 located at the center of the gel layer 30 in the first direction D1, a second thin portion 38 located at the end of the gel layer 30 in the first direction D1, and a plurality of first thin portions 34 located at the center of the gel layer 30 in the first direction D1. It includes a thick part 36 located between the thin part 34 and the second thin part 38 . Furthermore, the convex portion 33 has a first intermediate portion 35 located between the first thin portion 34 and the thick portion 36, and a second intermediate portion 37 located between the thick portion 36 and the second thin portion 38. ,including.

As shown in FIG. 5(b), the first thin part 34 is thinner than the first intermediate part 35, and the first intermediate part 35 is thinner than the thick part 36. The thick portion 36 is thicker than the second intermediate portion 37, and the second intermediate portion 37 is thicker than the second thin portion 38. In this embodiment, the thick portion 36 is the thickest, the first intermediate portion 35 and the second intermediate portion 37 are the next thickest, and the first thin portion 34 and the second thin portion 38 are the thinnest.

For example, the thickness of the first thin portion 34 and the thickness of the second thin portion 38 are the same, and the thickness of the first intermediate portion 35 and the second intermediate portion 37 are the same. be. The thickness of the first thin part 34 and the second thin part 38 are T1, the thickness of the first intermediate part 35 and the second intermediate part 37 are T2, and the thick part 36 When the thickness of the thickness T3 is defined as the thickness T3, for example, the value of the thickness T1 is 3 mm, the value of the thickness T2 is 4 mm, and the value of the thickness T3 is 5 mm.

FIG. 6 is a cross-sectional view taken along the line AA in FIG. 1 at the central portion 2 of the pillow 1. In FIG. 6, the illustration of the convex portion 13 is simplified. As shown in FIG. 6, a space C is formed between the surface layer 10 and the gel layer 30 in the central portion 2. The space C is defined by the back surface 12b of the surface layer 10 and the second recess 52 of the gel layer 30. In a state where no load is applied from the user's head or the like, the surface layer 10 is suspended from the gel layer 30 in the center portion 2 due to the space C.

For example, the depth E of the bottom portion 52b of the second recess 52 with respect to the highest portion of the gel layer 30 is 2 cm or more and 10 cm or less. The lower limit of the depth E may be 3 cm or 4 cm. The upper limit of the depth E may be 9 cm, 8 cm, 7 cm or 6 cm. As an example, depth E is 5 cm.

That is, the surface layer 10 is spaced apart from the gel layer 30 and the bottom layer 20 in the central portion 2 . A portion of the plurality of through holes 40 communicate with the space C. Further, as described above, the surface layer 10 has the through hole 15 penetrating in the third direction D3. Therefore, in the pillow 1, an air flow path R passing through the through hole 40, the space C, and the through hole 15 is formed.

Next, the effects obtained from the pillow 1 according to this embodiment will be explained in detail. The pillow 1 includes a surface layer 10 directed vertically upward, a bottom layer 20 directed vertically downward, and a gel layer 30 interposed between the surface layer 10 and the bottom layer 20. The gel layer 30 is made of a flexible material. The gel layer 30 is soft, has high body pressure dispersion, high thermal conductivity, and exhibits a high cooling sensation. Therefore, when the user's head is placed on the pillow 1, the gel layer 30 comes into contact with the head via the surface layer 10, thereby providing the user with high cushioning properties and a high cooling sensation.

In the pillow 1, the surface layer 10 is bonded to the bottom layer 20 at the outer edge portion 1d in plan view, and the surface layer 10 is not bonded to the bottom layer 20 at the center portion in plan view, and is attached to the gel layer through the space C. It will be in a state of floating from 30. Therefore, when the user's head is placed on the central portion of the pillow 1 in a plan view, the surface layer 10 deforms greatly, providing a feeling of high cushioning properties.

Furthermore, when the surface layer 10 deforms under the load of the head, air passes through the air flow path R and air in the space C escapes to the outside of the pillow 1 via the surface layer 10, thereby improving breathability. can be increased. Then, when the load of the head on the surface layer 10 is released, the deformation of the surface layer 10 returns to its original state and the space C is formed again. Therefore, by repeatedly deforming the surface layer 10 in the space C, it is possible to promote air flow to the pillow 1, thereby improving cushioning properties and breathability. In addition, by improving breathability, the temperature of the gel layer that warms up when it comes into contact with the head can be lowered.

As shown in FIG. 4, the gel layer 30 may have grooves 32 on the upper surface 31 facing the surface layer 10 side. In this case, since the grooves 32 are formed on the upper surface 31 of the gel layer 30, the grooves 32 can be used as air flow paths on the upper surface 31 of the gel layer 30. That is, it is possible to make it easier for air to flow through the grooves 32 on the upper surface 31 of the gel layer 30, so that air permeability can be further improved. In addition, by improving breathability, the temperature of the gel layer that warms up when it comes into contact with the head can be lowered.

As shown in FIGS. 2 and 4, the gel layer 30 has a first through hole 41 extending in the third direction D3, and the bottom layer 20 communicates with the first through hole 41 and opens vertically downward. A second through hole 42 may be provided. In this case, the first through hole 41 and the second through hole 42 form a through hole 40 that extends from the top surface 31 of the gel layer 30 to the bottom surface 20d of the bottom layer 20, so that the air from the gel layer 30 to the bottom layer 20 is The flow path R can be ensured to further improve air permeability. Therefore, it is possible to prevent heat from being trapped inside the pillow 1.

The bottom layer 20 has a first recess 51 recessed vertically downward in a region including the center in a plan view, and the gel layer 30 has a second recess 52 formed following the first recess 51. The depth E of the bottom portion 52b of the two recesses 52 may be greater than or equal to 2 cm and less than or equal to 10 cm. In this case, the depth E of the second recess 52 formed in the area including the center of the gel layer 30 in plan view is 2 cm or more, so that the space formed between the surface layer 10 and the gel layer 30 Since a large volume of C can be ensured, this contributes to further improvement of air permeability. Moreover, by setting the depth E of the second recess 52 to 10 cm or less, it is possible to avoid the second recess 52 from becoming too deep and giving a sense of discomfort to the user.

As shown in FIG. 1, the surface layer 10 has a central portion 2 located at the center in the first direction D1, and both side portions 3 located on both sides of the central portion 2 in the first direction D1. The portion 3 includes both side convex portions 13c that are oriented vertically upward and have a rectangular shape in a plan view, and the central portion 2 includes a central side convex portion 13b that is oriented vertically upward and has a rectangular shape in a plan view. The width of the central convex portion 13b may be narrower than the width of the both side convex portions 13c.

In this case, the width of the central convex portion 13b located in the central portion 2 of the pillow 1 is narrower than the width of the both side convex portions 13c. Therefore, by narrowing the width of the central convex portion 13b, it is possible to make the central portion 2 more easily follow the shape of the user's head when the user's head is placed on it. That is, when the width of the central convex portion 13b is narrow, more of the central convex portions 13b can be more flexibly deformed along the shape of the user's head, so that the central portion 2 of the surface layer 10 and Air circulation with the space C can be further promoted. Therefore, it contributes to further improvement of air permeability.

As shown in FIGS. 5(a) and 5(b), the gel layer 30 has a first thin part 34 located at the center in the first direction D1 and a first thin part 34 located at each end in the first direction D1. It may have two thin parts 38 and a thick part 36 located between the first thin part 34 and the second thin part 38. In this case, the thick portion 36 of the gel layer 30 is provided between the first thin portion 34 located at the center in the first direction D1 and the second thin portion 38 located at each end in the first direction D1. Therefore, by providing the thick part 36 of the gel layer 30 between the center and both ends in the first direction D1, when the user's cheek is placed against the thick part 36, the user has higher cushioning properties and a higher cooling sensation. can make the user feel.

The embodiments of the pillow according to the present disclosure have been described above. However, the pillow according to the present disclosure is not limited to the embodiments described above, and may be modified without changing the gist of each claim. That is, the shape, size, number, material, and arrangement of each part of the pillow can be changed as appropriate without departing from the above gist.

For example, in the embodiment described above, the pillow 1 having a butterfly shape was described. However, the outer shape of the pillow may be a shape other than a butterfly shape, such as a rectangular parallelepiped shape. Further, in the above embodiment, the pillow 1 includes the surface layer 10 having a plurality of convex portions 13 and concave portions 14 formed by two-dimensional cutting of urethane foam. However, the shape, size, number, and arrangement of the convex portions and grooves of the pillow are not limited to the above example and can be changed as appropriate. The shape, size, number, and arrangement of the holes in the pillow are not limited to the examples of the above-described embodiments, and can be changed as appropriate. Furthermore, the pillow may have no unevenness.

Further, in the above-described embodiment, the surface layer 10 includes the first layer 11 made of filmless urethane foam and the second layer 12 made of urethane foam having impact resilience of 15% to 50%, and molded urethane foam. The bottom layer 20 made of foam and the gel layer 30 made of urethane gel are exemplified. However, the configurations and materials of the surface layer, bottom layer, and gel layer are not limited to the above examples and can be changed as appropriate.

Further, in the above-described embodiment, the gel layer 30 has the lattice-shaped grooves 32 and the circular first through holes 41 on the upper surface 31. However, the shape, size, number, and arrangement of the grooves and through holes in the gel layer are not limited to the above examples and can be changed as appropriate. Furthermore, the pillow according to the present disclosure may include a gel layer that does not have at least one of grooves and through holes.

1...Pillow, 1b...Long side, 1c...Short side, 1d...Outer edge part, 2...Central part, 2A...Central area, 2B...Both sides area, 3...Both sides, 3A...Central area, 3B...Both sides area, 10 ...Surface layer, 11...First layer, 12...Second layer, 12b...Back surface, 12c...Groove, 12d...Thin groove, 12f...Thick groove, 12g...Horizontal groove, 12h, 13...Convex part, 13b...Central side convex Part, 13c...Convex portion on both sides, 14...Concave portion, 15...Through hole, 15b...Long hole, 15c...Wide hole, 20...Bottom layer, 20c...Top surface, 20d...Bottom surface, 25...Side surface, 30...Gel layer, 31 ...upper surface, 32...groove, 32b...first groove, 32c...second groove, 33...convex portion, 34...first thin part, 35...first intermediate part, 36...thick part, 37...second intermediate part , 38... Second thin part, 40... Through hole, 41... First through hole, 42... Second through hole, 50... Recess, 51... First recess, 52... Second recess, 52b... Bottom, C... Space part, D1...first direction, D2...second direction, D3...third direction, F...film, L1, L2...reference line, P...adhesion part, R...air flow path, X...crossing part.

Claims (5)

The pillow is made of a flexible material that extends in a first direction and a second direction that intersects the first direction, and has a thickness in a third direction that intersects both the first direction and the second direction. hand,
a surface layer directed vertically upward;
a bottom layer directed vertically downward;
a gel layer interposed between the surface layer and the bottom layer;
Equipped with
The surface layer is bonded to the bottom layer at the outer edge portion in plan view,
In a region including the center in plan view and other than the outer edge portion, the surface layer is separated from the gel layer via a space,
The bottom layer has a first recess depressed vertically downward in a region including the center in plan view,
The gel layer has a second recess formed following the first recess,
The depth of the bottom surface of the second recess is 2 cm or more and 10 cm or less,
pillow. The gel layer has a groove on the upper surface facing the surface layer,
The pillow according to claim 1. The gel layer has a first through hole extending in the third direction,
The bottom layer has a second through hole that communicates with the first through hole and opens vertically downward.
The pillow according to claim 1 or 2. The surface layer has a central portion located at the center in the first direction, and both side portions located on both sides of the central portion in the first direction,
The both side portions include both side convex portions that are directed vertically upward and have a rectangular shape in plan view,
The central portion includes a central convex portion that is directed vertically upward and has a rectangular shape in plan view;
The width of the central convex portion is narrower than the width of the both side convex portions.
The pillow according to any one of claims 1 to 3 . The gel layer includes a first thin part located at the center in the first direction, a second thin part located at each end in the first direction, and between the first thin part and the second thin part. having a thick wall portion located at
The pillow according to any one of claims 1 to 4 .

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