Pillow

Abstract

The utility model provides a pillow which enables a sleeper to sleep comfortably. When placed in use, the pillow (1) is provided with a central part (33) and a pair of left and right side parts (34L, 34R) continuous with the left and right end edges of the central part (33) and extending in the left and right directions, and the hardness of the central part (33) due to a load applied from above is harder than the hardness of the left and right side parts (34L, 34R).

Description

TECHNICAL FIELD

[0001] The utility model relates to a pillow. BACKGROUND

[0002] Patent document 1 discloses a conventional pillow. The pillow has a central portion provided in the center in the left-right direction, and left and right side portions provided on the left and right sides of the central portion and thinner than the central portion in thickness. With the pillow, the head of a sleeper is rotated from the central portion to either of the left and right side portions by the difference in thickness between the central portion and the left and right side portions, and the head of the sleeper is placed laterally on the left and right side portions. Therefore, the pillow makes the head of the sleeper lateral, thereby easily keeping the airway of the sleeper and preventing the sleeper from snoring.

[0003] Patent document 1: Japanese Patent Publication No. 2022-536211

[0004] With the pillow of patent document 1, in the case of a healthy adult, turning over twenty times or so during the night is not taken into consideration. Therefore, the pillow has a risk of not being good at turning over. The pillow not good at turning over makes the burden on the body of the sleeper greater, and the sleeper cannot obtain comfortable sleep. In addition, the pillow is not flat in the state of being placed in a manner of use, so that when the sleeper places the head on the pillow, it is unstable. SUMMARY

[0005] The utility model is completed in view of the above-mentioned conventional actual situation, and needs to solve the subject in providing a pillow with which a sleeper can obtain comfortable sleep.

[0006] The pillow of the utility model has, in the state of being placed in a manner of use, a central portion, and a side portion continuous with at least one of the left and right end edges of the central portion and extending in the left-right direction, the hardness of the central portion based on a load applied from above being harder than the hardness of the side portion.

[0007] With the pillow, the hardness of the central portion is made harder than that of the side portion, so that when the sleeper places the head on the pillow, the head can naturally incline by a prescribed angle or more in a manner of turning toward the side portion that is softer and more concave than the central portion. The prescribed angle is 40±5° (the same hereinafter). The angle is the angle formed between the direction in which the face of the sleeper faces in the state of being upward and the direction in which the face of the sleeper faces in the state of the head being inclined. If the head of the sleeper is inclined by 40±5° or more, the airway can be ensured and snoring can be reduced. That is, the pillow can promote the head of the sleeper to naturally become a relaxed lateral direction by the difference in hardness, and as the direction of the head is made toward the lateral direction, the direction of the body also easily changes, so that turning over is easily performed and snoring can be reduced.

[0008] Therefore, the pillow can make the sleeper obtain comfortable sleep. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a perspective view showing the pillow of Example 1.

[0010] Figure 2 is a plan view showing the pillow of Example 1.

[0011] Figure 3 is a bottom view showing the pillow of Example 1.

[0012] Figure 4 is a front view showing the pillow of Example 1.

[0013] Figure 5 is a right side view showing the pillow of Example 1.

[0014] Figure 6 is a cross-sectional view taken along the line Y1-Y1 of Figure 2 .

[0015] Figure 7 is a cross-sectional view taken along the line X1-X1 of Figure 2 .

[0016] Figure 8 is a cross-sectional view taken along the line X2-X2 of Figure 2 .

[0017] Figure 9 is a cross-sectional view taken along the line X3-X3 of Figure 2 .

[0018] Figure 10 is a perspective view showing the housing portion of the pillow body of Example 1.

[0019] Figure 11 is a perspective view showing the pillow core material of Example 1.

[0020] Figure 12 is a view showing the use state of the pillow of Example 1 as viewed from the left side.

[0021] Figure 13 is a view showing the use state of the pillow of Example 1 as viewed from the rear side.

[0022] EXPLANATION OF REFERENCE NUMERALS

[0023] 1… pillow; 20… pillow core material; 30… upper portion; 33… central portion; 34L, 34R… left and right side portions (side portions); 35L, 35R… recessed portions; 40… lower portion; 43… outer peripheral surface. DETAILED DESCRIPTION

[0024] A preferred embodiment of the present application will be described.

[0025] In a state where the pillow of the present application is placed in a manner of use, the upper surface of the central portion can be a convex shape protruding upward. In this case, when the sleeper places the head on the pillow, the back of the head is not easily stabilized on the convex central portion. Therefore, for the pillow, the head is easily inclined in a manner of turning from the central portion toward the side portions due to the inclined surface inclined downward from the central portion toward the side portions and the difference in hardness between the central portion and the side portions, the head of the sleeper is naturally inclined by a prescribed angle or more, and the side position is facilitated.

[0026] The pillow of the present application can have a pillow core material disposed in the central portion. In this case, for the pillow, the central portion can be easily provided with an optimum hardness and height that easily incline the head of the sleeper by a prescribed angle or more, and the head of the sleeper is naturally facilitated to be in a relaxed side position.

[0027] The pillow of the present application can have a recess formed in the upper surface of the side portion. In this case, for the pillow, in a state where the head of the sleeper is inclined and in a side position, the ears of the sleeper are positioned in the recess formed in the side portion. Therefore, the pillow does not press the ears of the sleeper and the sleeper can have more comfortable sleep.

[0028] The pillow of the present application, in a state where it is placed in a manner of use, has an upper portion and a lower portion continuously provided below the upper portion, and the left and right end portions of the upper portion can protrude in the left and right directions more than the outer periphery of the lower portion. In this case, the pillow can position the arms and shoulders of a lying sleeper below the left and right end portions of the upper portion that protrude in the left and right directions more than the outer periphery of the lower portion. Therefore, the pillow can maintain a stable posture of the lying sleeper and obtain comfortable sleep.

[0029] The pillow of the present application, in a state where it is placed in a manner of use, has an upper portion and a lower portion continuously provided below the upper portion, and the left and right rear end portions of the upper portion can protrude in the rear direction more than the outer periphery of the lower portion. In this case, for the pillow, the lying sleeper can hold the left and right rear end portions of the upper portion that protrude in the rear direction more than the outer periphery of the lower portion. Therefore, the pillow can give a sense of security to the lying sleeper.

[0030] Example 1

[0031] Next, an embodiment 1 in which the pillow 1 of the present application is embodied will be described with reference to the drawings. For the convenience of description, in a state in which the pillow 1 is placed in a manner of use, the side on which the surface to be laid is provided is set as the lower side, the side opposite thereto is set as the upper side, the side of the body of a sleeper on which the head is placed on the pillow 1 is set as the front side, the side opposite thereto is set as the rear side, and the left and right in the front view observed from the front side are set as the left and right. In the three-dimensional orthogonal coordinate system shown in each drawing, the positive direction of the X-axis is the "left direction", the negative direction of the X-axis is the "right direction", the positive direction of the Y-axis is the "front direction", the negative direction of the Y-axis is the "rear direction", the positive direction of the Z-axis is the "upper direction", and the negative direction of the Z-axis is the "lower direction".

[0032] As shown in Figures 1-11 , the pillow 1 of the embodiment 1 is provided with a pillow main body 10 and a pillow core material 20. The pillow 1 is covered with a cloth cover having softness which is not shown. The pillow main body 10 and the pillow core material 20 are formed of polyurethane foam. The hardness of the polyurethane foam forming the pillow main body 10 is 73.5 N (unit: Newton (hereinafter the same)). The hardness of the polyurethane foam forming the pillow core material 20 is 400 N. The hardness of the polyurethane foam is measured based on JIS K6400-2 A method.

[0033] The pillow main body 10 forms the outer shape of the pillow 1. As shown in Figure 10 , the pillow main body 10 has a housing portion 11 in which an opening portion 13 which opens downward is formed in the left and right central portions of the lower surface 41 of the lower portion 40 described later. The shape of the opening portion 13 of the housing portion 11 is a long rectangle which is long in the front and rear directions. The length 13L of the long side of the opening portion 13 of the housing portion 11 is 175 ± 5 mm, and the length 13S of the short side of the opening portion 13 of the housing portion 11 is 75 ± 5 mm. The left and right center lines of the opening portion 13 of the housing portion 11 and the left and right center lines of the pillow main body 10 extend on the same line. The housing portion 11 is a similar shape which is slightly smaller than the outer shape of the pillow core material 20 described later. As shown in Figure 6 and Figure 7 , the pillow core material 20 is housed in the housing portion 11 without a gap from the inner surface of the housing portion 11. In a state in which the pillow core material 20 is housed in the housing portion 11, the lower surface 21 of the pillow core material 20 extends on the same plane as the lower surface 41 of the lower portion 40 of the pillow main body 10.

[0034] In a state in which the pillow 1 is placed in a manner of use, as shown in Figure 11As shown, the pillow core material 20 has an upper part 20A and a lower part 20B. The upper part 20A extends in the front-to-back direction and is a generally semi-cylindrical shape with a curved upper surface. The curved upper surface of the upper part 20A follows the convex shape of the upper surface of the central part 33, which will be described later. The lower part 20B is a generally quadrangular prism continuously provided below the upper part 20A. The left-right width of the upper part 20A is the same as the left-right width of the lower part 20B. The upper part 20A and the lower part 20B are integrally formed. The front end face 22 of the pillow core material 20 is a vertical surface extending vertically upward from the front end edge 21F of the lower surface 21 of the pillow core material 20. The rear end face 23 of the pillow core material 20 is an inclined surface extending upward and obliquely forward from the rear end edge 21R of the lower surface 21 of the pillow core material 20. The front-to-back length 20LT of the upper surface of the pillow core material 20 at its center is 150mm. The front-to-back length 20LB of the lower surface of the pillow core material 20 is 180mm. Furthermore, for optimal effect, the front-to-back length 20LB of the lower surface of the pillow core material 20 should be at least 100mm and less than the front-to-back length of the pillow body 10. The left-to-right length 20W of the lower surface of the pillow core material 20 is 80mm. Except for the curved upper surface of the upper part 20A of the pillow core material, the width of the pillow core material 20 in the left-to-right direction is the same throughout. Furthermore, for optimal effect, the width of the pillow core material 20 in the left-to-right direction can be 50mm to 150mm; setting it to 60mm to 100mm further helps to stabilize the back of the sleeper's head in the center and promotes a relaxed sideways position. The height 20H of the pillow core material 20 is 70mm. In addition, in order to achieve the desired effect, the height 20H of the pillow core material 20 can be 50mm to 120mm. By setting it to 60mm to 90mm, the firmness of the pillow 1 can be achieved such that the central part does not sink excessively and the sleeper is unaware of the presence of the pillow core material 20.

[0035] like Figures 1-10 As shown, the pillow 1, which includes a pillow body 10 and a pillow core material 20, has an upper part 30 and a lower part 40. The lower part 40 of the pillow 1 is continuously disposed below the upper part 30. The upper part 30 and the lower part 40 are integrally formed.

[0036] like Figure 2As shown, the upper portion 30 is left-right symmetrical in plan view (hereinafter, referred to as "plan view") when viewed from above in a state in which the pillow 1 is placed in a manner for use. In the plan view, the left and right widths of the front end portion of the upper portion 30 are wider than the left and right widths of the rear end portion, and the four corners of the left and right front end portions 31L, 31R and the left and right rear end portions 32L, 32R are curved in a manner that bulges outward. The left and right widths 30W of the front end portion of the upper portion 30 are 650 ± 20 mm. The front and rear widths 30N of the upper portion 30 are 400 ± 10 mm. In the plan view, the front end edge 30F and the rear end edge 30T of the upper portion 30 are curved in a manner that the left and right central portions bulge inward. In the plan view, the left and right central portions of the upper portion 30 are narrowed in the front and rear direction. In the plan view, the left and right end edges 30L, 30R of the upper portion 30 are curved in a manner that the portions of about 2 / 3 of the front and rear length from the front end bulge inward. In the plan view, the portions of about 2 / 3 of the front and rear length from the front end of the upper portion 30 are narrowed in the left and right direction.

[0037] As shown in Figure 1 , Figure 2 , and Figure 4 , the upper portion 30 includes a central portion 33 and a pair of left and right side portions 34L, 34R. The central portion 33 and the pair of left and right side portions 34L, 34R of the upper portion 30 correspond to the central portion and the side portions of the pillow 1. The upper surface of the central portion 33 is a convex shape that protrudes upward. The convex central portion 33 extends in the front and rear direction from the vicinity of the front end edge of the upper portion 30 to the vicinity of the rear end edge of the upper portion 30 in the left and right central portions of the upper portion 30. As shown in Figure 6 and Figure 7 , the pillow core material 20 is disposed below the central portion 33. The convex central portion 33 gradually increases in height toward the central portion in the front and rear direction at the front end portion and the rear end portion, and a top portion 33T that extends in the front and rear direction at the same height is formed in a range of about 1 / 2 of the length in the front and rear direction. The height is a height from the disposition surface when the pillow 1 is placed in a manner for use on the disposition surface (the same hereinafter). The top portion 33T extends on the left and right center lines of the upper portion 30. The central portion 33 is curved in a manner that the regions on the left and right sides of the top portion 33T bulge upward, and has left and right inclined surfaces that decline from the top portion 33T toward the left and right directions.

[0038] The inventors and the like determined the convex shape of the central portion 33 as shown below. First, the inventors and the like conducted a study using a hard styrofoam model. In the hard styrofoam model, the inventors and the like set the left and right widths of the convex shape to 150 mm, set the height at positions 75 mm apart from the top in the left and right directions to 60 mm, and set the height of the top 33T to 70 mm to 90 mm. The reason for setting the left and right widths of the convex shape to 150 mm is because the distance from the temple to the temple of the average person's head is 150 mm. If this convex shape, it is difficult for the occiput of the sleeper to be stabilized in the central portion 33, and it is possible to tilt the head by a prescribed angle or more to secure the respiratory tract, and it is easy to turn over.

[0039] In order to achieve excellent lying comfort, the amount of depression of the polyurethane foam is set as shown below when the pillow 1 is formed of the polyurethane foam. Based on the weight of the average person's head, the amount of depression of the polyurethane foam when the head is placed on the pillow in the supine position is set to 25 mm, and the amount of depression of the polyurethane foam when the head is placed on the pillow in the lateral position is set to 20 mm.

[0040] Thus, the convex shape of the central portion 33 is designed based on the position where the head portion is supported by the recessed urethane foam, the left and right widths are set to 150 mm, the height of the top portion 33T is set to 105 mm, and the height at a position 75 mm apart in the left and right directions from the top portion 33T is set to 80 mm. Further, in order to promote the natural lateral turning of the head of the sleeper, the left and right widths can be 60 mm to 300 mm, by setting them to 100 mm to 230 mm, the effect can be further improved, and by setting them to 130 mm to 170 mm, the effect can be particularly achieved. That is, the height at a position 30 mm to 150 mm apart in the left and right directions from the top portion is made to differ from the height of the top portion, thereby promoting the natural lateral turning of the head of the sleeper, by setting them to 50 mm to 115 mm, the effect can be further improved, and by setting them to 65 mm to 85 mm, the effect can be particularly achieved. In order to make the occiput of the sleeper less likely to be stabilized at the top portion, with respect to the range of the hardness of the pillow main body 10 assumed, the height of the top portion 33T can be 80 mm to 130 mm, by setting it to 95 mm to 115 mm, the effect can be further improved, and by setting it to 100 mm to 110 mm, the effect can be particularly achieved. In order to promote the natural lateral turning of the head of the sleeper, with respect to the range of the hardness of the pillow main body 10 assumed, the height at a position 75 mm apart in the left and right directions from the top portion 33T can be 55 mm to 105 mm, by setting it to 70 mm to 90 mm, the effect can be further improved, and by setting it to 75 mm to 85 mm, the effect can be particularly achieved. In order to promote the natural lateral turning of the head of the sleeper, the difference between the height of the top portion 33T and the height at a position 75 mm apart in the left and right directions from the top portion 33T can be 10 mm to 40 mm, by setting it to 15 mm to 35 mm, the effect can be further improved, and by setting it to 20 mm to 30 mm, the effect can be particularly achieved.

[0041] As shown in Figure 1 , Figure 2 , and Figure 6 , a pair of left and right side portions 34L, 34R is continuous with the left and right end edges of the central portion 33. The upper surfaces of the left and right side portions 34L, 34R are continuous with the left and right inclined surfaces of the convex-shaped central portion 33. The left and right side portions 34L, 34R each have a recessed portion 35L, 35R formed in the upper surface. The recessed portions 35L, 35R each extend in the left and right directions from the vicinity of the left and right sides of the central portion 33. The recessed portions 35L, 35R are each formed in the front and rear central portions of the upper portion 30. The outer periphery of each of the recessed portions 35L, 35R is a substantially rectangular shape in plan view, which is long in the left and right directions. Each of the recessed portions 35L, 35R is a curved surface curved in a manner expanding downward. Each of the recessed portions 35L, 35R is a left and right symmetrical shape with respect to the left and right center lines of the upper portion 30.

[0042] As Figure 6 shown, the upper surface of each of the left and right side portions 34L, 34R rises from the central portion side toward the left and right end edges in any cross-sectional shape parallel to the left-right direction. As Figure 8 and Figure 9 shown, the upper surface of each of the left and right side portions 34L, 34R extends in a substantially horizontal direction in a portion other than the recessed portions 35L, 35R in any cross-sectional shape parallel to the front-rear direction. As Figures 4-6 shown, the height 30H of the left and right end portions of the upper portion 30 is slightly higher than the top 33T of the central portion 33, and is 110 ± 20 mm. The outer edge portion of each of the left and right side portions 34L, 34R extends outwardly from the upper end outer periphery of the lower portion 40. As Figures 4-9 shown, the lower surface 34U of the outer edge portion of each of the left and right side portions 34L, 34R is a curved surface curved in a manner that it expands slightly downward while tilting upward from the upper end outer periphery of the lower portion 40 toward the outside and upward.

[0043] As Figure 3 shown, in a bottom view (hereinafter referred to as "bottom view") when the pillow 1 is placed in a state of use, the lower portion 40 is a left-right symmetrical shape. The thickness of the lower portion 40 is 45 ± 10 mm. The lower surface 41 of the lower portion 40 is a flat surface. By making the lower surface 41 of the lower portion 40 a flat surface, a stable feeling as the pillow 1 is obtained, and at the same time, the head of the sleeper can be inclined. The outer peripheral surface 43 of the lower portion 40 stands up in the vertical direction from the outer periphery of the lower surface 41. The left and right widths 40W of the lower portion 40 are 485 ± 5 mm. The front-rear width 40N of the lower portion 40 is 275 ± 5 mm. In the bottom view, the front end edge 40F of the lower portion 40 is curved in a manner that the left and right central portions expand toward the rear. In the bottom view, the front end edge 40F of the lower portion 40 extends behind the front end edge 30F of the upper portion 30. That is, the front end portion of the upper portion 30 protrudes forward of the outer peripheral surface 43 of the lower portion 40. In the bottom view, the left and right end edges 40L, 40R and the rear end edge 40T of the lower portion 40 continuous with both sides of the front end edge 40F of the lower portion 40 are curved in a manner that they expand toward the left and right and the rear. In the bottom view, the left and right end edges 40L, 40R of the lower portion 40 extend inwardly along the front-rear direction from the left and right end edges 30L, 30R of the upper portion 30. In the bottom view, the rear end edge 40T of the lower portion 40 extends inwardly along the left-right direction from the rear end edge 30T of the upper portion 30. That is, the left and right end portions of the upper portion 30 protrude in the left-right direction from the left and right end edges 40L, 40R of the lower portion 40, and the left and right rear end portions of the upper portion 30 protrude rearward of the outer peripheral surface 43 of the lower portion 40.

[0044] As Figure 12 and Figure 13As shown, the left and right end portions of the upper portion 30, which protrude in the left and right directions from the outer peripheral surface 43 of the lower portion 40, can arrange the arms and shoulders of a lying sleeper thereunder. In consideration of the average maximum arm circumference of a human forearm, the recess of the mattress on which the pillow 1 is placed, and the recess of the lower surface 34U of the outer edge portion of each of the left and right side portions 34L, 34R when a hand is inserted thereinto, a space of about 60 mm in diameter is formed under the lower surface 34U. The lying sleeper can grasp the left and right rear end portions of the upper portion 30, which protrude rearward from the outer peripheral surface 43 of the lower portion 40. In addition, the lying sleeper can also grasp the portions in which the left and right end portions of the upper portion 30 are narrowed.

[0045] As shown below, the hardness at prescribed positions of the pillow 1 having the pillow main body 10 and the pillow core material 20 was measured. The measurer performed the measurement using a compression testing machine (AG-X plus manufactured by Shimadzu Corporation) on the basis of JIS K6400-2 A method. As shown in Figure 2 As shown, the measurement points are three points of points A to C of the pillow 1. The point A is the top 33T of the convex central portion 33, and is a position on the center line in the front and rear direction of the pillow 1. The point B is the boundary between the convex central portion 33 and the left side portion 34L, and is a position 75 mm away to the left from the point A on the center line in the front and rear direction of the pillow 1. The point C is the left side portion 34L, and is a position 190 mm away to the left from the point A on the center line in the front and rear direction of the pillow 1.

[0046] The measurer placed the pillow 1 in the state of being used on the compression testing machine, arranged the center of the pressure plate at the points A, B, and C, respectively, and measured the hardness at each measurement point. The compression testing machine compressed the pillow 1 placed between the pressure plate moved in the vertical direction at a speed of 100 ± 20 mm / minute and the fixed support plate. The pressure plate was a circular disc of 100 mm in diameter. The measurement was performed after the preliminary compression shown in JIS K6400-2 A method, after the pressure plate was pressed from above the pillow 1 at a speed of 100 ± 20 mm / minute to (40 ± 1) % of the thickness, and after the compression was maintained for 30 ± 1 seconds, the force at that time was read, and the value was taken as the degree of hardness. The average value of three measurements for each measurement point was point A: 68 N, point B: 59 N, and point C: 34 N.

[0047] In order to be able to promote the natural side-lying of the head of the sleeper and the easy turning over, and to be able to reduce snoring, the hardness of the point A is preferably in the range of 60 N to 70 N. The hardness of the point B is preferably in the range of 50 N to 60 N. The difference between the hardness of the points A and B is preferably in the range of 8 N to 12 N. In addition, the difference between the hardness of the points A and B is at least 5 N or more, and the effect can be achieved between 6.5 N and 15 N.

[0048] As explained above, the pillow 1 of Embodiment 1 has, in a state of being placed in a manner of use, the central portion 33, and the left and right side portions 34L, 34R which are continuous with the left and right end edges of the central portion 33, respectively, and which extend in the left and right directions, the central portion 33 having a hardness which is harder than the hardness of the left and right side portions 34L, 34R based on a load applied from above.

[0049] For this pillow 1, by making the hardness of the central portion 33 harder than the hardness of the left and right side portions 34L, 34R, when the sleeper places the head on the pillow, the head is able to naturally incline by a prescribed angle or more in a manner of turning toward the left and right side portions 34L, 34R which are softer and concave more than the central portion 33. That is, this pillow 1 is able to promote the head of the sleeper to naturally become a relaxed lateral direction by the difference in hardness, and as the direction of the head is made toward the lateral direction, the direction of the body also easily changes, so turning over is easy and snoring can be alleviated.

[0050] Therefore, the pillow 1 of Embodiment 1 is able to make the sleeper obtain comfortable sleep.

[0051] In a state of the pillow 1 of Embodiment 1 being placed in a manner of use, the upper surface of the central portion 33 is a convex shape which protrudes upward. When the sleeper places the head on this pillow 1, the back of the head is not easily stabilized on the convex central portion 33. Therefore, for this pillow 1, due to the inclined surface which inclines downward from the central portion 33 toward the left and right side portions 34L, 34R, and the difference in hardness of the central portion 33 and the left and right side portions 34L, 34R, the head is easily inclined in a manner of turning from the central portion 33 toward the left and right side portions 34L, 34R, and the head of the sleeper is able to be promoted to naturally incline by a prescribed angle or more and become a relaxed lateral direction.

[0052] The pillow 1 of Embodiment 1 has the pillow core material 20 which is disposed in the central portion 33. This pillow 1 is able to easily set the central portion 33 to an optimal hardness, height which easily inclines the head of the sleeper by a prescribed angle or more, and is able to promote the head of the sleeper to naturally become a relaxed lateral direction.

[0053] For the pillow 1 of Embodiment 1, the recesses 35L, 35R are formed in the upper surfaces of the left and right side portions 34L, 34R. For this pillow 1, in a state in which the head of the sleeper is inclined and becomes a lateral direction, the ears of the sleeper are positioned in the recesses 35L, 35R which are formed in the side portions. Therefore, this pillow is able to make the sleeper obtain more comfortable sleep without pressing the ears of the sleeper.

[0054] The pillow 1 of Embodiment 1 has, in a state in which it is placed in a manner of use, an upper portion 30 and a lower portion 40 that is continuously provided below the upper portion 30, and the left and right end portions of the upper portion 30 protrude in the left and right directions beyond the outer circumferential surface 43 of the lower portion 40. This pillow 1 is able to arrange the arms and shoulders of a lying sleeper below the left and right end portions of the upper portion 30 that protrude in the left and right directions beyond the outer circumferential surface 43 of the lower portion 40. Therefore, this pillow 1 is able to allow a lying sleeper to secure a stable posture and achieve comfortable sleep.

[0055] The pillow 1 of Embodiment 1 has, in a state in which it is placed in a manner of use, an upper portion 30 and a lower portion 40 that is continuously provided below the upper portion 30, and the left and right end portions of the upper portion 30 protrude in the left and right directions beyond the outer circumferential surface 43 of the lower portion 40. This pillow 1 is able to arrange the arms and shoulders of a lying sleeper below the left and right end portions of the upper portion 30 that protrude in the left and right directions beyond the outer circumferential surface 43 of the lower portion 40. Therefore, this pillow 1 is able to allow a lying sleeper to secure a stable posture and achieve comfortable sleep.

[0056] The present application is not limited to the embodiment described above and illustrated in the drawings, and for example, the following embodiments are also included in the technical scope of the present application.

[0057] (1) Preferably, the pillow has, in a state where it is placed in a manner of use, a central portion, and left and right side portions which are continuous with left and right end edges of the central portion and extend in the left and right directions, and the hardness measured based on JIS K6400-2 A is 40 N to 120 N. Preferably, the central portion is a convex shape in which the upper surface protrudes upward, extends in the front and back directions in the left and right central portions of the upper portion, the height of the top portion is 80 mm to 130 mm, has left and right inclined surfaces which descend from the top portion toward the left and right directions, and the difference between the height of the top portion and the height at a position 30 mm to 150 mm away from the top portion in the left and right directions is 10 mm to 40 mm. Preferably, the pillow also has a pillow inner material, and the hardness of the pillow inner material, which is measured based on JIS K6400-2 A, is harder than that of the pillow main body, extends along the convex shape of the upper surface of the central portion, the upper portion of the pillow inner material is a substantially semicylindrical shape in which the upper surface is curved, the height of the pillow inner material is 50 mm to 120 mm, the left and right widths of the pillow inner material are 50 mm to 150 mm, and the hardness of the central portion based on the load applied from above is harder than that of the side portions. With this pillow, by designing the height so as to take into account the amount of depression in accordance with the hardness of the pillow main body, it is possible to reduce the feeling of oppression on the head while the pillow main body does not excessively depress due to the pillow inner material, and it is possible to promote the head of the sleeper to naturally become a relaxed lateral direction while achieving a soft lying comfort. With this pillow, although there is a height in the central portion of the pillow, it does not cause an obstacle when the sleeper turns the head toward the opposite direction, and it is possible to promote a natural turning over. With the central portion, by setting the difference between the height at a position 30 mm to 150 mm away from the top portion in the left and right directions and the height of the top portion to be 10 mm to 40 mm, the sleeper is able to naturally turn the head to the lateral direction without effort. The pillow inner material is a substantially semicylindrical shape in which the upper surface is curved, and thus it is possible to promote the sleeper to naturally turn the head to the lateral direction without being aware of the presence of the pillow inner material. The height of the top portion of the pillow inner material is formed to be 50 mm to 120 mm, and thus the central portion does not excessively depress, and it is possible to achieve a hardness to the extent that the sleeper is not aware of the presence of the pillow inner material. The width in the left and right directions of the pillow inner material is formed to be 50 mm to 150 mm, and thus it is possible to stabilize the occiput of the sleeper in the central portion, and it is possible to promote a relaxed lateral direction.

[0058] (2) The pillow 1 of Example 1 has the left and right side portions 34L, 34R which are continuous with the left and right end edges of the central portion 33. In contrast, the pillow can have the side portion provided only on either one of the left and right end edges of the central portion.

[0059] (3) In the pillow 1 of Embodiment 1, the upper surface of the central portion 33 is convexly shaped so as to protrude upward. In contrast, the upper surface of the central portion of the pillow can also extend on the same plane as the side portions. In this case, it is only necessary to make the hardness of the side portions softer than that of the central portion and to make the recess of the side portions larger than that of the central portion so as to incline the head of the sleeper.

[0060] (4) In the pillow 1 of Embodiment 1, the pillow core material 20 is provided in the central portion 33. In contrast, the pillow can also not be provided with a pillow core material.

[0061] (5) In the pillow 1 of Embodiment 1, the recesses 35L, 35R are formed in the upper surfaces of the left and right side portions 34L, 34R. In contrast, the recesses can also not be formed in the upper surfaces of the left and right side portions of the pillow.

[0062] (6) The left and right end portions and the left and right rear end portions of the upper portion 30 of the pillow 1 of Embodiment 1 protrude outwardly of the outer periphery 43 of the lower portion 40. In contrast, the upper portion and the lower portion of the pillow can also have the same outer shape when viewed from above or below.

[0063] (7) The hardness of the pillow body 10 of Embodiment 1 is 73.5 N. In contrast, the hardness of the pillow body can be 40 N to 120 N, and by making it 60 N to 85 N, it is possible to use the pillow comfortably without feeling pain even when the head is placed on the pillow for a long time.

[0064] (8) The hardness of the pillow core material 20 of Embodiment 1 is 400 N. In contrast, the hardness of the pillow core material can be at least harder than that of the pillow body.

[0065] (9) The pillow core material upper portion 20A of Embodiment 1 is substantially semi-cylindrical in shape with the upper surface curved. In contrast, the curvature of the curved surface of the upper surface of the pillow core material upper portion can be made larger or smaller, or can be changed to a suitable shape such as a triangular prism without being curved.

[0066] (10) In Embodiment 1, the convex shape of the central portion 33 was designed so that the amount of recess of the polyurethane foam when the head is placed on the pillow in a supine position is 25 mm and the amount of recess of the polyurethane foam when the head is placed on the pillow in a lateral position is 20 mm, but it can also be designed based on different amounts of recess according to the hardness of the polyurethane foam.

[0067] (11) The height 30H of the left and right end portions of the upper portion 30 of the pillow 1 of Embodiment 1 is slightly higher than the top 33T of the central portion 33. In contrast, the height of the left and right end portions of the upper portion of the pillow can also be lower than the top of the central portion. In addition, the height 30H of the left and right end portions of the upper portion 30 of the pillow 1 of Embodiment 1 is 110 ± 20 mm, but it can be made further higher and formed in a convex shape to prevent the head of the sleeper from falling off the pillow.

[0068] (12) The width in the left and right directions of the entire pillow core material can also be different. For example, the width in the left and right directions of the upper portion of the pillow core material can be set to 50 mm to 150 mm, and the lower portion of the pillow core material can be made to be substantially the same length as the left and right widths of the pillow main body.

Claims

1. A pillow characterized by comprising: a central portion, and a side portion continuous with at least one of left and right end edges of the central portion and extending in a left-right direction, in a state of being placed in a manner of use. A hardness of the central portion based on a load applied from above is harder than the hardness of the side portion.

2. The pillow according to claim 1, characterized in that, in a state of being placed in a manner of use, an upper surface of the central portion is a convex shape projecting upward.

3. The pillow according to any one of claims 1 and 2, characterized by comprising a pillow core material disposed in the central portion.

4. The pillow according to any one of claims 1 and 2, characterized in that a recess is formed in an upper surface of the side portion.

5. The pillow according to any one of claims 1 and 2, characterized in that, in a state of being placed in a manner of use, an upper portion and a lower portion continuously provided below the upper portion are provided, Left and right end portions of the upper portion project in a left-right direction than an outer peripheral surface of the lower portion.

6. The pillow according to any one of claims 1 and 2, characterized in that, in a state of being placed in a manner of use, an upper portion and a lower portion continuously provided below the upper portion are provided, Left and right rear end portions of the upper portion project in a rear direction than an outer peripheral surface of the lower portion. ​ ​ ​ ​ ​ ​

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