Pillow

Abstract

To provide a pillow which has high air permeability and good drainage and is easily washable.SOLUTION: A pillow includes a top surface that extends in a width direction and a front-rear direction intersecting the width direction and on which a head of a user is placed, a bottom surface that extends in the width direction and the front-rear direction and is located on a side opposite to the top surface, a first groove provided on the top surface and extending along the width direction, and a second groove provided on the bottom surface and extending along the front-rear direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to pillows. [Background technology]

[0002] Patent Document 1 discloses a foam resin mattress with a plurality of grooves on the top and bottom surfaces. Patent Document 2 discloses a foam resin cushion material and pillow with a plurality of grooves on the top surface. Patent Document 3 discloses a foam resin pillow with through holes. Patent Document 4 discloses a foam resin pillow with a plurality of grooves and through holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-067754 [Patent Document 2] Patent Publication No. 2021-094274 [Patent Document 3] Japanese Patent Application Laid-Open No. 2004-358137 [Patent Document 4] No. 3195012 Publication Summary of the Invention [Problem to be solved by the invention]

[0004] Pillows are sometimes washed to keep them clean. In such cases, it is desirable for the pillow to be quickly dehydrated and dried. It is also desirable for the pillow to have high breathability even when in use. The present disclosure provides a pillow that is highly breathable, has good drainage, and is easily washable. [Means for solving the problem]

[0005] A pillow according to one embodiment of the present disclosure comprises a top surface on which a user's head is placed, extending in a width direction and a front-to-back direction intersecting the width direction, a bottom surface which extends in the width direction and the front-to-back direction and is located opposite the top surface, a first groove provided on the top surface and extending along the width direction, and a second groove provided on the bottom surface and extending along the front-to-back direction. [Effects of the Invention]

[0006] According to the present disclosure, a pillow that is highly breathable, has good drainage, and is easily washable can be provided. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a top view showing a pillow according to a first embodiment. [Figure 2] FIG. 1 is a side view showing a pillow according to a first embodiment. [Figure 3] FIG. 1 is a front view showing a pillow according to a first embodiment. [Figure 4] FIG. 2 is an enlarged perspective view showing a part of the pillow of the first embodiment. [Figure 5] FIG. 10 is a top view showing a pillow according to a second embodiment. [Figure 6] FIG. 10 is a side view showing a pillow according to a second embodiment. [Figure 7] FIG. 10 is a front view showing a pillow according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0009] First Embodiment As shown in FIG. 1, in this embodiment, the pillow 1 is placed on a mattress, a futon, or the like. The pillow 1 can be used in a so-called supine position, in which the back of the user's head is mainly in contact with the pillow 1, as well as in a so-called side-lying position (hereinafter referred to as lateral lying), in which the user lies on their side and the temples of the head are in contact with the pillow 1. In FIG. 1, arrow W corresponds to the width direction of the pillow 1, arrow L corresponds to the front-to-back direction, and arrow H corresponds to the height direction. The width direction W of the pillow 1 roughly coincides with the width direction of the mattress or futon. Furthermore, the front-to-back direction L of the pillow 1 roughly coincides with the length direction of the mattress or futon. Note that in the front-to-back direction L, the side that supports the user's neck when the pillow 1 is in use is described as the front side, and the side that supports the area around the top of the head opposite the front side is described as the rear side.

[0010] The pillow 1 is a block-shaped pillow formed so that the dimension in the width direction W is 350 mm to 700 mm, the dimension in the front-to-back direction L is 300 mm to 500 mm, and the maximum dimension in the thickness direction H is 30 mm to 60 mm. In this embodiment, a block-shaped pillow 1 with a dimension in the width direction W of 400 mm, a dimension in the front-to-back direction of 360 mm, and a maximum dimension in the thickness direction H of 50 mm will be described as an example.

[0011] The pillow 1 is formed from a foamed resin. The pillow 1 of this embodiment is formed from a soft polyurethane foam with an open-cell structure. The foamed resin forming the pillow 1 is a soft polyurethane foam with a 25% compression hardness of 40 N to 300 N and a rebound resilience of 5% to 70% according to JIS K6400. Depending on the purpose, low-resilience foam with a rebound resilience of 5% to 15%, general foam with a rebound resilience of 15% to 50%, or high-resilience foam with a rebound resilience of 50% or more can be used. The values ​​for compression hardness and rebound resilience are shown as measured according to the measurement methods specified in JIS K6400-1 to JIS K6400-5. However, when international standards or other standards are applied, the values ​​are converted appropriately based on the respective standards. However, without being limited to this, the pillow 1 may also be formed from polyurethane foam cut from slab foam or molded polyurethane foam.

[0012] The pillow 1 includes a top surface 1a on which the user's head rests, and a bottom surface 1b located on the opposite side of the top surface 1a. The top surface 1a may be flat, or may be curved to fit the shape of the user's head. The top surface 1a of this embodiment is formed as a curved surface with a slight concave in the center where the user's head rests, and the size in the thickness direction H (the thickness of the pillow 1) is greatest around the center.

[0013] The top surface 1a includes a first end W1 and a second end W2 opposite the first end W1 in the width direction W. In addition, the top surface 1a includes a first end L1 on the front side and a second end L2 on the rear side opposite the first end L1 in the front-rear direction L.

[0014] The top surface 1a is divided into a top surface central portion T1 and a top surface peripheral portion T2 located at a different position from the top surface central portion T1 in the front-to-back direction L. The top surface central portion T1 includes the center in the front-to-back direction L and contacts the user's head. In this embodiment, the top surface peripheral portion T2 has a top surface front portion T2a and a top surface rear portion T2b that are positioned on either side of the top surface central portion T1 in the front-to-back direction L. The top surface front portion T2a is located forward of the top surface central portion T1 and includes a first end portion L1. The top surface rear portion T2b is located rearward of the top surface central portion T1 and includes a second end portion L2. The top surface front portion T2a contacts the user's neck. The top surface central portion T1, the top surface front portion T2a, and the top surface rear portion T2b divide the top surface 1a into different sizes in the front-to-back direction L, but this is not limited to this, and the top surface central portion T1 and the top surface peripheral portion T2 may also divide the top surface 1a into equal portions.

[0015] The bottom surface 1b is divided in the width direction W into a bottom surface central portion B1 and a bottom surface peripheral portion B2 located at a different position from the bottom surface central portion B1. The bottom surface central portion B1 includes the center in the width direction W. A portion of the bottom surface central portion B1 overlaps with the top surface central portion T1 in the thickness direction H. In this embodiment, the bottom surface peripheral portion B2 has a bottom surface left portion B2a and a bottom surface right portion B2b located on either side of the bottom surface central portion B1 in the width direction W. The bottom surface left portion B2a is located closer to the first end W1 than the bottom surface central portion B1 and includes the first end W1. The bottom surface right portion B2b is located closer to the second end W2 than the bottom surface central portion B1 and includes the second end W2. The bottom center B1, bottom left B2a, and bottom right B2b divide the bottom surface 1b equally in the width direction W, but this is not limited to this, and the bottom center B1 and bottom peripheral B2 may divide the bottom surface 1b into sections of different sizes.

[0016] The pillow 1 has a first groove 10 provided in the top surface 1a and a second groove 20 provided in the bottom surface 1b.

[0017] The first groove 10 is a linear groove extending along the width direction W. The first groove 10 extends in the width direction W from a first end W1 of the pillow 1 to a second end W2.

[0018] A plurality of first grooves 10 are provided at intervals in the front-rear direction L. The first grooves 10 of this embodiment include a first transverse groove 10a, a second transverse groove 10b, a third transverse groove 10c, a fourth transverse groove 10d, a fifth transverse groove 10e, and a sixth transverse groove 10f. The number of first grooves 10 can be changed as appropriate depending on the size or shape of the pillow 1.

[0019] The first to sixth transverse grooves 10a to 10f are arranged at equal intervals in the front-to-rear direction L, but may be arranged at different intervals. In this embodiment, the first to sixth transverse grooves 10a to 10f are arranged at equal intervals of 50 mm to 60 mm in the front-to-rear direction L.

[0020] In this embodiment, the first transverse groove 10a and the second transverse groove 10b are arranged in the top surface rear portion T2b of the top surface peripheral portion T2. ​​The third transverse groove 10c and the fourth transverse groove 10d are arranged in the top surface central portion T1. The fifth transverse groove 10e and the sixth transverse groove 10f are arranged in the top surface front portion T2a of the top surface peripheral portion T2.

[0021] The top surface 1a of the pillow 1 is divided into a plurality of blocks extending in the width direction W by a plurality of first grooves 10. As a result, the pillow 1 does not hinder the rotational movement of the user's head in the width direction W, such as when turning over while sleeping, thereby improving sleeping comfort.

[0022] As shown in FIG. 2 , the first groove 10 is defined in the front-to-rear direction L by a first inner surface 11 and a second inner surface 12 that face each other, and a bottom surface portion 13 that connects the first inner surface 11 and the second inner surface 12. The bottom portion 13a of the first groove 10 is the portion that is closest to the bottom surface 1b of the bottom surface portion 13 in the thickness direction H. In this embodiment, the first inner surface 11 and the second inner surface 12 are vertical walls that extend parallel to each other in the width direction W and the thickness direction H, and the bottom surface portion 13 smoothly connects the first inner surface 11 and the second inner surface 12. However, the first inner surface 11 and the second inner surface 12 may be inclined with respect to the thickness direction H.

[0023] The first grooves 10 arranged in the top surface central portion T1 are formed to have a first groove depth d1 in the thickness direction H. The first groove depth d1 is the distance in the thickness direction H between the top surface 1a and the bottom 13a of one of the first grooves 10 arranged in the top surface central portion T1 (e.g., the third transverse groove 10c or the fourth transverse groove 10d). The first grooves 10 arranged in the top surface peripheral portion T2 are formed to have a second groove depth d2 in the thickness direction H. The second groove depth d2 is the distance in the thickness direction H between the top surface 1a and the bottom 13a of one of the first grooves 10 arranged in the top surface peripheral portion T2 (e.g., the first transverse groove 10a, the second transverse groove 10b, the fifth transverse groove 10e, or the sixth transverse groove 10f). In this embodiment, the second groove depth d2a at the top surface front portion T2a of the top surface peripheral portion T2 is equal to the second groove depth d2b at the top surface rear portion T2b of the top surface peripheral portion T2, but this is not limited to this and they may be formed to different sizes.

[0024] The first groove depth d1 is greater than the second groove depth d2. In this embodiment, the first groove depth d1 is 40 mm or more and 60 mm or less, and the second groove depth d2 is 20 mm or more and 40 mm or less.

[0025] The top surface central portion T1 of the pillow 1 has first grooves 10 that are deeper than the top surface peripheral portion T2. ​​Therefore, the top surface central portion T1 of the pillow 1 is more easily deformed (softer) than the top surface peripheral portion T2. ​​This allows the pillow 1 to have relatively high rigidity in the top surface peripheral portion T2 (top surface front portion T2a) that supports the user's neck, and the top surface central portion T1 that supports the user's head can deform according to the shape of the back or sides of the head, improving sleeping comfort.

[0026] 1, the second groove 20 is a linear groove extending along the front-rear direction L. The second groove 20 extends in the front-rear direction L from a first end L1 to a second end L2 of the pillow 1.

[0027] A plurality of second grooves 20 are provided at intervals in the width direction W. The second grooves 20 of this embodiment include a first vertical groove 20a, a second vertical groove 20b, a third vertical groove 20c, a fourth vertical groove 20d, a fifth vertical groove 20e, a sixth vertical groove 20f, a seventh vertical groove 20g, an eighth vertical groove 20h, a ninth vertical groove 20i, and a tenth vertical groove 20j. The number of second grooves 20 can be changed as appropriate depending on the size or shape of the pillow 1.

[0028] In this embodiment, the first longitudinal groove 20a and the second longitudinal groove 20b are arranged in the bottom left portion B2a of the bottom peripheral portion B2. The third longitudinal groove 20c, the fourth longitudinal groove 20d, the fifth longitudinal groove 20e, the sixth longitudinal groove 20f, the seventh longitudinal groove 20g, and the eighth longitudinal groove 20h are arranged in the bottom central portion B1. The ninth longitudinal groove 20i and the tenth longitudinal groove 20j are arranged in the bottom right portion B2b of the bottom peripheral portion B2.

[0029] As shown in FIG. 3 , the second groove 20 is defined in the width direction W by a first inner surface 21 and a second inner surface 22 that face each other, and a top surface portion 23 that connects the first inner surface 21 and the second inner surface 22. The top surface 23a of the second groove 20 is the location that is closest to the top surface 1a of the top surface portion 23 in the thickness direction H. In this embodiment, the first inner surface 21 and the second inner surface 22 are vertical walls that extend parallel to each other in the front-rear direction L and the thickness direction H, and the top surface portion 23 smoothly connects the first inner surface 21 and the second inner surface 22. However, the first inner surface 21 and the second inner surface 22 may be inclined with respect to the thickness direction H.

[0030] Two adjacent second grooves 20 arranged in the bottom surface central portion B1 are arranged to have a first interval w1 in the width direction W. The first interval w1 is the distance in the width direction W between the first inner surfaces 21 of two second grooves 20 arranged in the bottom surface central portion B1 (for example, the third longitudinal groove 20c and the fourth longitudinal groove 20d, the fourth longitudinal groove 20d and the fifth longitudinal groove 20e, the fifth longitudinal groove 20e and the sixth longitudinal groove 20f, the sixth longitudinal groove 20f and the seventh longitudinal groove 20g, and the seventh longitudinal groove 20g and the eighth longitudinal groove 20h). Two adjacent second grooves 20 arranged in the bottom surface peripheral portion B2 are arranged to have a second interval w2 in the width direction W. The second interval w2 is the distance in the width direction W between the first inner surfaces 21 of two second grooves 20 (e.g., the first longitudinal groove 20a and the second longitudinal groove 20b, or the ninth longitudinal groove 20i and the tenth longitudinal groove 20j) arranged in the bottom peripheral portion B2. In this embodiment, the second interval w2a in the bottom left portion B2a of the bottom peripheral portion B2 is equal to the second interval w2b in the bottom right portion B2b of the bottom peripheral portion B2, but is not limited to this and the second grooves 20 may be arranged at different intervals.

[0031] The first distance w1 is smaller than the second distance w2. In this embodiment, the first distance w1 is equal to or greater than 50 mm and equal to or less than 50 mm, and the second distance w2 is equal to or greater than 60 mm and equal to or less than 70 mm.

[0032] The spacing between the second grooves 20 arranged in the bottom center B1 of the pillow 1 is smaller (the pitch is smaller) than the spacing between the second grooves 20 arranged in the bottom peripheral portion B2. Therefore, the bottom center B1 of the pillow 1 is more easily deformed (softer) than the bottom peripheral portion B2. This allows the pillow 1 to deform in the bottom center B1 that supports the user's head according to the shape of the occipital or temporal region of the head, improving sleeping comfort.

[0033] The second grooves 20 are formed to have a third groove depth d3 in the thickness direction H. The third groove depth d3 is the distance in the thickness direction H between the apex 23a of one of the second grooves 20 (for example, any of the first longitudinal groove 20a to the tenth longitudinal groove 20j) and the bottom surface 1b. The third groove depth d3 is constant regardless of the location of the second grooves 20, but is not limited to this. The third groove depth d3 may be different between the second grooves 20 arranged in the bottom surface central portion B1 and the second grooves 20 in the bottom surface peripheral portion B2. In this embodiment, the third groove depth d3 is the same for all second grooves 20 and is 40 mm or more and 50 mm or less.

[0034] FIG. 4 is an enlarged perspective view showing a location where one first groove 10 and one second groove 20 intersect. As shown in FIG. 4, the sum of the first groove depth d1 of the first groove 10 and the third groove depth d3 of the second groove 20 is greater than the size in the thickness direction H of the pillow 1 (the thickness of the pillow 1). Similarly, the sum of the second groove depth d2 of the first groove 10 and the third groove depth d3 of the second groove 20 is greater than the size in the thickness direction H of the pillow 1 (the thickness of the pillow 1). As a result, as shown by dotted lines in FIG. 4, at the location where the first groove 10 and the second groove 20 intersect, a through portion 30 is formed that penetrates from the top surface 1a to the bottom surface 1b in the thickness direction H. The through portion 30 in this embodiment is a rectangular prism-shaped space along the thickness direction H.

[0035] As shown in Fig. 1, the through portions 30 are formed in all locations where the first grooves 10 and the second grooves 20 overlap in the thickness direction H. Fig. 1 shows only the through portions 30 formed at the locations where the first transverse grooves 10a of the first grooves 10 and the first longitudinal grooves 20a of the second grooves 20 intersect, but the through portions 30 in this embodiment are formed in all locations where the first transverse grooves 10a to the sixth transverse grooves 10f and the first longitudinal grooves 20a to the tenth longitudinal grooves 20j intersect. However, this is not limiting, and the through portions 30 may be formed in at least one location.

[0036] As a result, the through-holes 30 can improve the breathability of the pillow 1. Furthermore, the through-holes 30 can increase the surface area of ​​the pillow 1. This allows the pillow 1 to quickly evaporate moisture remaining inside the pillow 1 after washing, etc. As a result, the pillow 1 can be dried quickly.

[0037] Second Embodiment

[0038] 5 to 7, a second embodiment of the present disclosure will be described, with reference to the differences from the pillow 1 of the first embodiment. The pillow 101 of this embodiment includes a main body part 110 and a support part 111 connected to the main body part 110.

[0039] The main body 110 is a block-shaped body having a width W dimension of 600 mm to 700 mm, a front-rear direction L dimension of 150 mm to 250 mm, and a thickness H dimension of 20 mm to 30 mm. The main body 110 of this embodiment is a block-shaped body having a width W dimension of 650 mm, a front-rear direction L dimension of 200 mm, and a thickness H dimension of 30 mm.

[0040] The main body 110 includes a first end L1 on the front side and a second end L2 on the rear side in the front-rear direction L. The second end L2 is the rear end of the entire pillow 101.

[0041] The support part 111 is connected to one end of the main body part 110 in the front-rear direction L, and supports the neck of the user. In this embodiment, the support part 111 includes a third end part L3 on the front side and a fourth end part L4 on the rear side in the front-rear direction L. The fourth end part L4 of the support part 111 is connected to the first end part L1 of the main body part 110. The third end part L3 is the front end part of the entire pillow 101.

[0042] The support portion 111 is shaped like a block having a width direction W dimension of 600 mm to 700 mm, a front-rear direction L dimension of 100 mm to 200 mm, and a maximum thickness direction H dimension of 30 mm to 50 mm. The width direction W dimension of the support portion 111 is formed to be the same as that of the main body portion 110. The maximum thickness direction H dimension of the support portion 111 is formed to be larger (thicker) than that of the main body portion 110. The support portion 111 of this embodiment is shaped like a block having a width direction W dimension of 650 mm, a front-rear direction L dimension of 100 mm, and a maximum thickness direction H dimension of 40 mm.

[0043] As shown in Fig. 6(a), the top surface 1a of the main body 110 is a flat surface extending in the width direction W and the front-rear direction L. On the other hand, the top surface 1a of the support part 111 is formed as a curved surface that is convex in the thickness direction H along the curvature of the user's neck.

[0044] A plurality of first grooves 10 are provided at intervals in the front-rear direction L. The first grooves 10 of this embodiment include a seventh lateral groove 10g, an eighth lateral groove 10h, a ninth lateral groove 10i, a tenth lateral groove 10j, an eleventh lateral groove 11k, a twelfth lateral groove 10l, a thirteenth lateral groove 10m, a fourteenth lateral groove 10n, and a fifteenth lateral groove 10o.

[0045] The seventh to tenth lateral grooves 10g to 10j are disposed on the top surface 1a of the main body portion 110. The seventh lateral groove 10g disposed on the rearmost side and the second end L2 of the main body portion 110 are disposed at a third distance w3 in the front-to-rear direction L. The third distance w3 is the distance between the first inner surface 11 of the seventh lateral groove 10g and the second end L2 in the front-to-rear direction L. Furthermore, two adjacent first grooves 10 disposed on the top surface 1a of the main body portion 110 are disposed at a fourth distance w4 in the front-to-rear direction L. The fourth distance w4 is the distance in the front-to-rear direction L between the first inner surfaces 11 of two first grooves 10 disposed on the top surface 1a of the main body portion 110 (for example, between the seventh lateral groove 10g and the eighth lateral groove 10h, between the eighth lateral groove 10h and the ninth lateral groove 10i, or between the ninth lateral groove 10i and the tenth lateral groove 10j). In this embodiment, the third interval w3 is larger than the fourth interval w4, but this is not limiting, and the third interval w3 may be equal to the fourth interval w4, or the third interval w3 may be smaller than the fourth interval w4. Furthermore, the fourth interval w4 in the main body 110 is equal, but this is not limiting, and the main body 110 may be arranged at different intervals.

[0046] Furthermore, the first grooves 10 arranged in the main body portion 110 are formed to have a fourth thickness d4 in the thickness direction H. The fourth thickness d4 is the distance in the thickness direction H between the bottom 13a of one of the first grooves 10 arranged in the main body portion 110 (for example, the seventh transverse groove 10g, the eighth transverse groove 10h, the ninth transverse groove 10i, and the tenth transverse groove 10j) and the bottom surface 1b of the main body portion 110. In this embodiment, the fourth thickness d4 is the same for all of the first grooves 10 arranged in the main body portion 110. However, the fourth thickness d4 may vary depending on the location where the first groove 10 is arranged.

[0047] The eleventh transverse groove 10k to the fifteenth transverse groove 100 are arranged on the top surface 1a of the support portion 111.

[0048] The first grooves 10 arranged in the support portion 111 are formed to have a fifth thickness d5 in the thickness direction H. The fifth thickness d5 is the distance in the thickness direction H between the bottom 13a of one of the first grooves 10 arranged in the support portion 111 (for example, the eleventh lateral groove 10k, the twelfth lateral groove 10l, the thirteenth lateral groove 10m, the fourteenth lateral groove 10n, and the fifteenth lateral groove 10o) and the bottom surface 1b of the main body portion 110. The fifth thickness d5 is greater than the fourth thickness d4 of the first grooves 10 arranged in the main body portion 110.

[0049] As a result, when pressed in the thickness direction H, the support part 111 is less likely to deform than the main body part 110, giving the user a relatively firm feel and providing stable support for the user's neck.

[0050] As shown in FIG. 6(b), the top surface 1a of the support portion 111 has, in the front-rear direction L, a first top surface portion 111a and a second top surface portion 111b located rearward of the first top surface portion 111a.

[0051] The first top surface portion 111a is a part of the top surface 1a formed between the thirteenth transverse groove 10m and the fourteenth transverse groove 10n of the first groove 10. The first top surface portion 111a extends in the width direction W and the front-rear direction L and is parallel to the top surface 1a of the main body portion 110a.

[0052] The second top surface portion 111b is a part of the top surface 1a formed between the twelfth transverse groove 1 and the thirteenth transverse groove 10m of the first groove 10. The second top surface portion 111b extends in the width direction W and the front-rear direction L and is inclined with respect to the top surface 1a of the main body portion 110a.

[0053] The user's neck is curved. The first top surface portion 111a supports the portion of the user's neck that is vertical in the thickness direction H. On the other hand, the second top surface portion 111b supports the portion of the user's neck that is inclined in the thickness direction H. By arranging the first top surface portion 111a and the second top surface portion 111b adjacent to each other in the front-to-back direction L, the support portion 111 can follow the curvature of the user's neck. Furthermore, when pressed along the thickness direction H, the second top surface portion 111b deforms so as to collapse in the front-to-back direction L. This allows the second top surface portion 111b to deform to follow the curvature of the user's neck. As a result, the support portion 111 can stably support the user's neck.

[0054] The first top surface portion 111a has a first curved surface R1 and is connected to the first inner side surface 11 of the thirteenth transverse groove 10m when viewed in the width direction W. The first curved surface R1 has a first radius r1 as a curvature radius.

[0055] The second top surface portion 111b has a second curved surface R2 and is connected to the second inner side surface 12 of the thirteenth transverse groove 10m when viewed in the width direction W. The second curved surface R2 has a second radius r2 of curvature.

[0056] The first top surface portion 111a and the first inner side surface 11 of the 13th lateral groove 10m are connected by a first curved surface R1 having a smaller radius of curvature than the second curved surface R2 connecting the second inner side surface 12 of the 13th lateral groove 10m and the second top surface portion 111b. That is, the first radius r1 is smaller than the second radius r2. In other words, the first top surface portion 111a and the first inner side surface 11 of the 13th lateral groove 10m are connected by a curved surface having a larger curvature than the second inner side surface 12 of the 13th lateral groove 10m and the second top surface portion 111b.

[0057] This prevents the connection point between the second top surface portion 111b and the second inner surface 12 of the 13th lateral groove 10m from hitting the user's neck when the second top surface portion 111b deforms in the front-to-back direction L so as to collapse, thereby improving sleeping comfort.

[0058] As shown in FIG. 5 , the second grooves 20 of this embodiment include an 11th longitudinal groove 20k, a 12th longitudinal groove 20l, a 13th longitudinal groove 20m, a 14th longitudinal groove 20n, a 15th longitudinal groove 20o, a 16th longitudinal groove 20p, a 17th longitudinal groove 20q, an 18th longitudinal groove 20r, a 19th longitudinal groove 20s, a 20th longitudinal groove 20t, a 21st longitudinal groove 20u, a 22nd longitudinal groove 20v, a 23rd longitudinal groove 20w, a 24th longitudinal groove 20x, a 25th longitudinal groove 20y, and a 26th longitudinal groove 20z.

[0059] In this embodiment, the 11th to 14th longitudinal grooves 20k to 20n are arranged in the bottom left portion B2a of the bottom peripheral portion B2, the 15th to 22nd longitudinal grooves 20o to 20v are arranged in the bottom central portion B1, and the 23rd to 26th longitudinal grooves 20w to 20z are arranged in the bottom right portion B2b of the bottom peripheral portion B2.

[0060] In this embodiment, the first interval w1 is equal to or greater than 20 mm and equal to or less than 30 mm, and the second interval w2 is equal to or greater than 40 mm and equal to or less than 50 mm, which is larger than the first interval w1.

[0061] 7, the third groove depth d3 of all second grooves 20 in this embodiment is equal to or greater than 10 mm and is equal to or less than 20 mm, regardless of the location of the second grooves 20. However, the third groove depth d3 may differ depending on the location of the second grooves 20.

[0062] The sum of the fourth thickness d4 of the first groove 10 and the third groove depth d3 of the second groove 20 is greater than the size in the thickness direction H of the pillow 1 (the thickness of the pillow 1). As a result, in this embodiment, at the location where the first groove 10 and the second groove 20 of the main body portion 110 intersect, a through portion 30 is formed that penetrates from the top surface 1a to the bottom surface 1b in the thickness direction H.

[0063] As shown in Fig. 5, the through-holes 30 are formed in all the locations where the first groove 10 and the second groove 20 of the main body 110 overlap in the thickness direction H. Fig. 5 shows only the through-holes 30 formed at the locations where the seventh transverse groove 10g of the first groove 10 and the eleventh longitudinal groove 20k of the second groove 20 intersect, but the through-holes 30 of this embodiment are formed in all the locations where the seventh transverse groove 10g to the eleventh transverse groove 10k and the eleventh longitudinal groove 20k to the 26th longitudinal groove 20z intersect. However, this is not a limitation, and the through-holes 30 may be formed in at least one location.

[0064] As described above, the pillow 1 (101) according to this embodiment can provide the following effects.

[0065] The pillow 1 (101) has a top surface 1a on which the user's head is placed, which extends in a width direction W and a front-to-back direction L intersecting the width direction W, a bottom surface 1b which extends in the width direction W and the front-to-back direction L and is located opposite the top surface 1a, a first groove 10 provided on the top surface 1a and extending along the width direction W, and a second groove 20 provided on the bottom surface 1b and extending along the front-to-back direction L.

[0066] According to this pillow 1 (101), the top surface 1a of the pillow 1 is divided into multiple blocks extending in the width direction W by the first grooves 10. As a result, the pillow 1 does not hinder the rotational movement of the user's head in the width direction W due to turning over while sleeping, improving sleeping comfort. Furthermore, by providing the second grooves 20 on the bottom surface 1b, the surface area of ​​the pillow 1 (101) is increased, improving breathability, and allowing moisture remaining inside the pillow 1 after washing, etc. to evaporate quickly. As a result, the pillow 1 can be dried quickly.

[0067] Furthermore, the pillow 1 (101) has a plurality of the second grooves 20, and the bottom surface 1b has a bottom surface central portion B1 located in the center of the width direction W and a bottom surface peripheral portion B2 located at a position different from the bottom surface central portion B1 in the width direction W, and the distance (first distance) w1 between two adjacent second grooves in the bottom surface central portion B1 may be smaller than the distance (second distance) w2 between two adjacent second grooves in the bottom surface peripheral portion B2.

[0068] As a result, the area of ​​the pillow 1 (101) corresponding to the bottom center B1 is more easily deformed (softer) than the area corresponding to the bottom peripheral B2. When the user is lying on their back, the area corresponding to the bottom center B1 supports the head, and when the user is lying on their side, the area corresponding to the bottom peripheral B2 supports the head. As a result, the height (size in the thickness direction H) of the pillow 1 (101) at the area corresponding to the bottom center B1 is relatively higher (larger) than the height of the pillow 1 (101) at the area corresponding to the bottom peripheral B2. As a result, the pillow 1 (101) can improve the sleeping comfort when used by the user whether lying on their back or on their side.

[0069] Furthermore, the pillow 1 (101) may have a through-hole 30 formed by the first groove 10 and the second groove 20 intersecting with each other and penetrating in the thickness direction H. This improves the breathability of the pillow 1 (101) and allows moisture remaining inside the pillow 1 after washing or the like to evaporate quickly.

[0070] The pillow 101 includes a main body 110, a support part 111 connected to one end (first end) L1 of the main body 110 in the front-rear direction L and supporting the neck of the user, and a plurality of the first grooves 10, and a distance (fourth thickness d4) between a bottom 13a of one of the plurality of first grooves 10 arranged in the support part 111 and the bottom surface 1b is greater than a distance between a bottom 13a of one of the plurality of first grooves 10 arranged in the main body 110 and the bottom surface 1b.

[0071] As a result, when pressed in the thickness direction H, the support part 111 is less likely to deform than the main body part 110, giving the user a relatively firm feel and providing stable support for the user's neck.

[0072] Furthermore, the pillow 1 (101) has a plurality of the first grooves 10, and the top surface 1a has a top surface central portion T1 located in the center of the front-to-back direction L and a top surface peripheral portion T2 located at a position different from the top surface central portion T1 in the front-to-back direction L, and the distance (first groove depth d1) between the bottom 13a of one of the plurality of first grooves 10 and the top surface 1a at the top surface central portion T1 may be greater than the distance (second groove depth d2) between the bottom 13a of one of the plurality of first grooves 10 and the top surface 1a at the top surface peripheral portion T2.

[0073] As a result, the pillow 1 (101) supports the user's neck at the top peripheral portion T2 (top front portion T2a) that supports the user's neck, and the top central portion T1 that supports the user's head can deform according to the shape of the back or side of the head, improving sleeping comfort.

[0074] Furthermore, the support portion 111 has a first inner surface 11 and a second inner surface 12 that face each other within the first groove 10, and in the support portion 111, the top surface 1a has a first top surface portion 111a located on the front side of the first groove 10 in the front-to-rear direction L and connected to the first inner surface 11, and a second top surface portion 111b located on the rear side of the first groove 10 in the front-to-rear direction L and connected to the second inner surface 12, the first top surface portion 111a being parallel to the top surface 1a of the main body portion 110, and the second top surface portion 111b being inclined with respect to the top surface 1a of the main body portion 110, and the first top surface portion 111a and the first inner surface 11 may be connected by a curved surface having a smaller radius of curvature than the second top surface portion 111b and the second inner surface 12.

[0075] As a result, the first top surface portion 111a contacts the user's neck perpendicularly in the thickness direction H to support the neck. Meanwhile, the second top surface portion 111b contacts the user's neck at an angle in the thickness direction H to support the neck. By arranging the first top surface portion 111a and the second top surface portion 111b adjacent to each other in the front-to-back direction L, the support portion 111 can conform to the curvature of the user's neck. Furthermore, when pressed along the thickness direction H, the second top surface portion 111b deforms so as to collapse in the front-to-back direction L. This allows the second top surface portion 111b to deform to conform to the curvature of the user's neck. As a result, the support portion 111 can stably support the user's neck. Furthermore, when the second top surface portion 111b deforms in the front-to-back direction L so as to collapse, the connection point between the second top surface portion 11b and the second inner surface 12 of the 13th lateral groove 10m can be prevented from hitting the user's neck, thereby preventing discomfort to the user, and improving sleeping comfort.

[0076] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary. [Explanation of symbols]

[0077] 1(101): Pillow 1a:Top surface 1b: Bottom T1: Center of top surface T2: Around the top surface B1: Bottom center part B2: Bottom periphery 10: 1st groove 20; 2nd groove 30: Penetration section 11: 1st inner surface 12:Second inner surface 13a: Bottom 110: Main body 111: Support part 111a: 1st top surface part 111b: Second top surface part R1: First surface R2: 2nd curved surface W: Width direction L: Anteroposterior direction H: Thickness direction

Claims

1. a top surface extending in a width direction and a front-rear direction intersecting the width direction, on which a user's head is placed; a bottom surface extending in the width direction and the front-rear direction and positioned opposite the top surface; a first groove provided on the top surface and extending along the width direction; a second groove provided on the bottom surface and extending along the front-rear direction; A pillow provided.

2. The second groove is provided in plurality, the bottom surface has a bottom surface central portion located in the center in the width direction and a bottom surface peripheral portion located at a position different from the bottom surface central portion in the width direction, a distance between two adjacent second grooves in the central portion of the bottom surface is smaller than a distance between two adjacent second grooves in the peripheral portion of the bottom surface; The pillow of claim 1.

3. The first groove and the second groove intersect to form a through-portion that penetrates in the thickness direction. The pillow of claim 1.

4. a main body; a support part connected to one end of the main body part in the front-rear direction and supporting the neck of the user; a plurality of the first grooves, a distance between a bottom of one of the plurality of first grooves disposed in the support portion and the bottom surface is greater than a distance between a bottom of one of the plurality of first grooves disposed in the main body portion and the bottom surface; The pillow of claim 1.

5. a plurality of the first grooves; the top surface has a top surface central portion located in the center in the front-rear direction and a top surface peripheral portion located at a position different from the top surface central portion in the front-rear direction, a distance between a bottom of one of the plurality of first grooves and the top surface at a central portion of the top surface is greater than a distance between a bottom of one of the plurality of first grooves and the top surface at a peripheral portion of the top surface; The pillow of claim 1.

6. the support portion has a first inner surface and a second inner surface facing each other in the first groove, In the support portion, the top surface has a first top surface portion located on a front side of the first groove in the front-rear direction and connected to the first inner surface side, and a second top surface portion located on a rear side of the first groove in the front-rear direction and connected to the second inner surface, the first top surface portion is parallel to the top surface of the body portion; the second top surface portion is inclined relative to the top surface of the main body portion; the first top surface portion and the first inner surface are connected by a first curved surface; the second top surface portion and the second inner surface are connected by a second curved surface, The radius of curvature of the first curved surface is smaller than the radius of curvature of the second curved surface.

5. The pillow according to claim 4.

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