Pillow

Abstract

To provide a pillow that can continuously provide comfortable sleeping also to a child who has a large amount of variation in the weight of the head and a large amount of variation in the length of the cervical vertebrae.SOLUTION: A pillow 1 according to one embodiment comprises: a body portion 2 extending in both a first direction D1 and a second direction D2 intersecting the first direction D1 and having a thickness in a third direction D3 intersecting both the first direction D1 and the second direction D2; a first neck plate 3 arranged in a central portion 2a located in a center of the body portion 2 in the second direction D2; and a second neck plate 4 arranged in the central portion 2a and aligned with the first neck plate 3 along the first direction D1. The second neck plate 4 is larger than the first neck plate 3. The hardness of the first neck plate 3 and the hardness of the second neck plate 4 are higher than the hardness of the body portion 2. A reference line crossing the center of the first direction D1 of the central portion 2a in the second direction D2 is located between the first neck plate 3 and the second neck plate 4.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Document 1 describes a pillow. The pillow comprises a pillow body with an accommodation groove, and an insertion rod that is accommodated in the accommodation groove. A high protrusion and a low protrusion are provided on the upper surface of the pillow body. The high protrusion is suitable for users with thick cervical vertebrae to place their heads on. The low protrusion is suitable for users with thin cervical vertebrae to place their heads on. The outer circumferential surface of the insertion rod is provided with a plurality of recessed grooves and a plurality of protrusions. When the head is placed on the insertion rod, the recessed grooves and protrusions deform, and the insertion rod deforms to fit the shape of the user's cervical vertebrae. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3102917 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when the pillow is used by a child, it is necessary to take into consideration that the amount of change in the weight of the user's head over several years will be greater than the amount of change in the weight of the user's head when the user is an adult. When the pillow is used by a child, it is necessary to take into consideration that the amount of change in the length of the user's cervical vertebrae will be greater than the amount of change in the length of the user's cervical vertebrae when the user is an adult. In order to provide a comfortable sleeping experience for children at an age when their heads are light in weight and their cervical vertebrae are short, the pillow must be able to deform to suit a light head, and the pillow must have a height that is suitable for a short cervical vertebra. In order to provide a comfortable sleeping experience for children at an age when their heads are heavy and their cervical vertebrae are long, the pillow must be moderately resistant to collapse so that it can support a heavy head, and the pillow must have a height that is suitable for a long cervical vertebra.

[0005] The present disclosure aims to provide a pillow that can continue to provide a comfortable sleeping experience even for children whose head weight fluctuates greatly and whose cervical vertebrae length fluctuates greatly. [Means for solving the problem]

[0006] The pillow according to the present disclosure (1) comprises a main body portion extending in both a first direction and a second direction intersecting the first direction and having a thickness in a third direction intersecting both the first and second directions, a first neck plate disposed in a central portion located at the center of the main body portion in the second direction, and a second neck plate disposed in the central portion and aligned with the first neck plate along the first direction. The second neck plate is greater in hardness than the first neck plate. The hardness of the first neck plate and the hardness of the second neck plate are greater than the hardness of the main body portion. A reference line is located between the first neck plate and the second neck plate, crossing the center of the central portion in the first direction in the second direction.

[0007] In this pillow, the first neck plate and the second neck plate are disposed in a central portion located at the center of the main body portion in the second direction. Therefore, when a user places their head on the center of the main body portion in the second direction, their head is supported by the main body portion, and their neck is supported by at least one of the first neck plate and the second neck plate. The first neck plate and the second neck plate are aligned along the first direction. A reference line is located between the first and second neck plates, crossing the center of the central portion in the first direction in the second direction. In other words, the first neck plate is located on the opposite side of the reference line from the side on which the second neck plate is located. By changing the orientation of the pillow in the first direction, it is possible to select whether the first neck plate or the second neck plate is positioned below the user's cervical vertebrae. The hardness of the first neck plate and the hardness of the second neck plate are higher than that of the main body portion. Therefore, when a user places their head on the pillow, the user feels the softness of the main body portion, and at least one of the first neck plate and the second neck plate supports the user's neck.

[0008] The second neck plate is larger than the first neck plate. Therefore, when the user is a child with a light head and short cervical vertebrae, the resistance force that the user's neck receives from the first neck plate can be reduced when the neck is placed on the small first neck plate, allowing the pillow to be appropriately deformed to fit the user's head. Furthermore, because the first neck plate is small, the user's neck can be supported at a low position to suit a short cervical vertebrae. On the other hand, when the user is a child with a heavy head and long cervical vertebrae, the user's head can be prevented from sinking too much when the neck is placed on the large second neck plate. Furthermore, because the second neck plate is large, the user's neck can be supported at a high position to suit a long cervical vertebrae. As described above, a comfortable sleeping experience can be continuously provided even for children whose head weight fluctuates greatly and whose cervical vertebrae length fluctuates greatly.

[0009] (2) In the above (1), the hardness of the second neck plate may be higher than that of the first neck plate. In this case, when a light user's neck is placed on the first neck plate, the first neck plate can be appropriately deformed. On the other hand, when a heavy user's neck is placed on the second neck plate, the second neck plate can more reliably support the user's neck.

[0010] (3) In the above (1) or (2), the main body may have a concave-convex structure formed on the surface of the main body located above the first neck plate. In this case, when the user places their head on the pillow, the concave-convex structure deforms appropriately, allowing the user to feel softness.

[0011] (4) In any of the above (1) to (3), the first neck plate may have a recess in which the length of the first neck plate in the third direction decreases toward the center of the first neck plate in the second direction. In this case, by forming a recess recessed downward on the top surface of the first neck plate, the shape of the first neck plate can be made to approximate the shape of the user's neck. As a result, the first neck plate can more reliably support the user's neck.

[0012] (5) In any of the above (1) to (4), the first neck plate may have a groove recessed downward on the surface that contacts the main body, and the groove may extend in the first direction. In this case, the user's cervical vertebrae can be accommodated in the groove of the first neck plate, and the first neck plate can support the area around the user's cervical vertebrae. This prevents the first neck plate from applying a concentrated resistance force to the user's cervical vertebrae.

[0013] (6) In any of the above (1) to (5), the first neck plate may have a rebound resilience of 35% or more and 60% or less, the main body may have a rebound resilience of 10% or more and 35% or less, and the main body may have a 40% hardness of 60 N or less. In this case, the main body has a 40% hardness of 60 N or less, which allows the user to feel softness. The main body has a rebound resilience of 10% or more and 35% or less, which allows the main body to sink appropriately when the user's head is placed on the main body. The first neck plate has a rebound resilience of 35% or more and 60% or less, which prevents the main body from sinking too much due to the weight of the user's head.

[0014] (7) In any of the above (1) to (6), the second neck plate may have a recess in which the length of the second neck plate in the third direction decreases toward the center of the second neck plate in the second direction. In this case, by forming a recess recessed downward on the upper surface of the second neck plate, the shape of the second neck plate can be made to approximate the shape of the user's neck. As a result, the second neck plate can more reliably support the user's neck.

[0015] (8) In any of the above (1) to (7), the second neck plate may have a groove recessed downward on the surface that contacts the main body, and the groove may extend in the first direction. In this case, the user's cervical vertebrae can be accommodated in the groove of the second neck plate, and the second neck plate can support the user's cervical vertebrae. This prevents the second neck plate from applying a concentrated resistance force to the user's cervical vertebrae.

[0016] (9) In any of the above (1) to (8), the rebound resilience of the second neck plate may be 35% or more and 60% or less, the rebound resilience of the main body may be 10% or more and 35% or less, and the 40% hardness of the main body may be 60 N or less. In this case, the 40% hardness of the main body is 60 N or less, which allows the user to feel softness. The rebound resilience of the main body is 10% or more and 35% or less, which allows the main body to sink appropriately when the user's head is placed on the main body. The rebound resilience of the second neck plate is 35% or more and 60% or less, which prevents the main body from sinking too much due to the weight of the user's head. [Effects of the Invention]

[0017] According to the present disclosure, it is possible to continuously provide a comfortable sleeping experience even for children whose head weight fluctuates greatly and whose cervical vertebrae length fluctuates greatly. [Brief explanation of the drawings]

[0018] [Figure 1]FIG. 1 is a perspective view of a pillow. [Figure 2] FIG. 2 is a bottom view of the pillow. [Figure 3] FIG. 3 is a plan view schematically showing the pillow. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a bottom view of the main body. [Figure 6] FIG. 6 is a perspective view of the first neck plate and the second neck plate. [Figure 7] FIG. 7 is a plan view of the first neck plate and the second neck plate. [Figure 8] FIG. 8 is a side view of the first neck plate and the second neck plate. [Figure 9] FIG. 9 is a perspective view of the pillow and the height-adjustable sheet. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment 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 given the same reference numerals, and duplicate explanations will be omitted as appropriate. The drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0020] FIG. 1 is a perspective view of a pillow 1. FIG. 2 is a bottom view of the pillow 1. FIG. 3 is a plan view schematically showing the pillow 1. The pillow 1 is used, for example, as bedding. In this embodiment, an example will be described in which the pillow 1 is children's bedding. For example, the pillow 1 is a children's pillow. For example, the age of the user of the pillow 1 is 5 years or older and 12 years or younger. A child's weight increases from about 20 kg to about 45 kg between the ages of 5 and 12. Accordingly, the weight of the child's head increases between the ages of 5 and 12.

[0021] Furthermore, a child's height increases from approximately 108 cm to approximately 150 cm between the ages of 5 and 12. Accordingly, the length of a child's cervical vertebrae increases between the ages of 5 and 12. When a 6-year-old child is lying on their back on a horizontal surface, the length from the horizontal surface to their neck is, for example, approximately 3.0 cm to 3.5 cm. When a 6-year-old child is lying on their back on a horizontal surface, the length from the horizontal surface to their occipital region is, for example, approximately 1.0 cm to 1.5 cm. When a 6-year-old child is lying on their side on a horizontal surface, the length from the horizontal surface to their temporal region is, for example, approximately 4.0 cm to 4.5 cm.

[0022] When a 12-year-old child is lying on their back on a horizontal surface, the distance from the horizontal surface to their neck is, for example, 4.5 cm to 5.0 cm. When a 12-year-old child is lying on their back on a horizontal surface, the distance from the horizontal surface to the back of their head is, for example, 2.5 cm to 3.0 cm. When a 12-year-old child is lying on their side on a horizontal surface, the distance from the horizontal surface to their side of their head is, for example, 5.5 cm to 6.0 cm.

[0023] The pillow 1 according to this embodiment is suitable for children whose heads are heavier and whose cervical vertebrae are longer. The pillow 1 is used, for example, housed in a stain-proof cover. The pillow 1 is made of a flexible material. The flexible material refers to a material that is soft enough to be deformed when the head is placed on it.

[0024] The pillow 1 has an upper surface 1a on which, for example, the user's head is placed, and a lower surface 1b facing the opposite side to the upper surface 1a. The pillow 1 has short sides 1c extending in a first direction D1 when viewed from above, and long sides 1d extending in a second direction D2 that intersects with the first direction D1 when viewed from above. The pillow 1 has a pair of short sides 1c aligned along the second direction D2, and a pair of long sides 1d aligned along the first direction D1. In this embodiment, the second direction D2 is perpendicular to the first direction D1. In this embodiment, the first direction D1 indicates the short side direction (width direction) of the pillow 1, and the second direction D2 indicates the long side direction of the pillow 1. The short sides 1c are, for example, linear. The long sides 1d are, for example, curved. The pair of long sides 1d approach each other as they approach the center in the second direction D2. The pillow 1 has a thickness in a third direction D3 that intersects with both the first direction D1 and the second direction D2. In this embodiment, the third direction D3 is perpendicular to both the first direction D1 and the second direction D2.

[0025] The pillow 1 has a rectangular shape in a plan view. The pillow 1 has a central region R1 including the center in the second direction D2, and side regions R2 adjacent to the central region R1 in the second direction D2. The pillow 1 has a pair of side regions R2. The central region R1 is located between the pair of side regions R2. For example, the length of the pillow 1 in the first direction D1 in the central region R1 is shorter than the length of the pillow 1 in the first direction D1 in the side regions R2. The length (height) of the pillow 1 in the third direction D3 in the central region R1 is shorter than the length of the pillow 1 in the third direction D3 in the side regions R2. The central region R1 is a portion that supports, for example, the back of the head and neck of a user sleeping on their back. The side regions R2 are a portion that supports, for example, the sides of the head and neck of a user sleeping on their side by rolling over.

[0026] The length of the pillow 1 in the first direction D1 in the side region R2 is, for example, 350 mm or more and 450 mm or less (for example, 375 mm). The length of the pillow 1 in the second direction D2 in the side region R2 is, for example, 160 mm or more and 250 mm or less (for example, 180 mm).

[0027] The length of the pillow 1 in the first direction D1 in the central region R1 is, for example, 290 mm or more and 400 mm or less (315 mm as one example). The length of the pillow 1 in the second direction D2 in the central region R1 is, for example, 130 mm or more and 200 mm or less (150 mm as one example). The length of the pillow 1 in the second direction D2 is, for example, 510 mm or more and 700 mm or less (600 mm as one example). The length of the pillow 1 in the third direction D3 will be described later.

[0028] The pillow 1 has, for example, a through-hole 1e penetrating the pillow 1 in the third direction D3 and a recessed portion 1f recessed downward from the upper surface 1a. The pillow 1 has a plurality of through-holes 1e and a plurality of recessed portions 1f. The plurality of through-holes 1e are provided in the central region R1 and each of the pair of side regions R2. The plurality of through-holes 1e provided in the side regions R2 are arranged in a triangular shape. That is, the region in the side regions R2 where the through-holes 1e are formed has a triangular shape (for example, an isosceles triangle shape). The length in the first direction D1 of the region in the side regions R2 where the through-holes 1e are formed increases as it approaches the end of the pillow 1 in the second direction D2. The plurality of through-holes 1e provided in the central region R1 are provided in the center of the central region R1 in the first direction D1.

[0029] For example, in a plan view (when viewed along the third direction D3), the shape of the recess 1f is the same as the shape of the through hole 1e. The recess 1f differs from the through hole 1e in that it does not penetrate the pillow 1. The multiple recesses 1f are provided in the central region R1. For example, the multiple recesses 1f are formed on both sides of the multiple through holes 1e provided in the central region R1 in the first direction D1. The multiple recesses 1f are arranged to form an X shape together with the multiple through holes 1e provided in the central region R1. The recesses 1f penetrate the main body 2 (described later) in the third direction D3. The bottom of the recess 1f is formed by either a surface extending along the contact surface 3a (see FIG. 6) of the first neck plate 3 (described later) or a surface extending along the contact surface 4a of the second neck plate 4 (described later).

[0030] Because the pillow 1 has multiple through holes 1e and multiple recesses 1f, the breathability of the pillow 1 is improved compared to pillows without through holes and recesses. When the user is a child, the user sweats more than when the user is an adult. Even when the user sleeps with their head resting on the pillow 1, the high breathability of the pillow 1 prevents the pillow from becoming stuffy.

[0031] The pillow 1 includes a main body 2 constituting the upper surface 1a, a first neck plate 3 connected to the main body 2, and a second neck plate 4 connected to the main body 2. The first neck plate 3 and the second neck plate 4 are portions that support the neck of a user placed on the pillow 1. In this embodiment, the user can select whether to rest their neck on the first neck plate 3 or the second neck plate 4. For example, when the pillow 1 is positioned so that the first neck plate 3 is positioned lower than the second neck plate 4 in a planar view, the first neck plate 3 supports the user's neck with the user's neck positioned above the first neck plate 3. For example, when the pillow 1 is positioned so that the second neck plate 4 is positioned lower than the first neck plate 3 in a planar view, the second neck plate 4 supports the user's neck with the user's neck positioned above the second neck plate 4. In this way, the user can select which neck plate to support their neck on.

[0032] The main body 2 extends in both the first direction D1 and the second direction D2. The main body 2 has a thickness in the third direction D3. The main body 2 is made of a flexible material. The impact resilience of the main body 2 is, for example, 10% or more and 35% or less. The 40% hardness of the main body 2 is, for example, 60 N or less. The main body 2 is made of, for example, urethane foam, latex foam, or mumaku urethane foam.

[0033] The main body 2 has a central portion 2a located in the center of the main body 2 in the second direction D2. The central portion 2a is composed of a portion of the main body 2 located in the central region R1. More specifically, the central portion 2a is a portion surrounded by the upper surface 1a, the lower surface 1b, both ends of the central region R1 in the first direction D1, and both ends of the central region R1 in the second direction D2. The main body 2 has a reference line L located in the center of the central portion 2a in the first direction D1. The reference line L extends in the second direction D2 and crosses the central portion 2a.

[0034] The main body 2 has a concave-convex structure formed on the upper surface 1a, which is the surface of the main body 2 located above the first neck plate 3. This concave-convex structure includes convex portions 21 formed on the upper surface 1a and concave portions 22 formed on the upper surface 1a. The main body 2 has a plurality of convex portions 21. The plurality of convex portions 21 are arranged, for example, in a staggered pattern on the upper surface 1a. The protrusion amount of the convex portions 21 decreases toward the center of the pillow 1 in the second direction D2. In the central region R1, the protrusion amount of the convex portions 21 decreases toward the center of the pillow 1 in the first direction D1. The concave portion 22 is sandwiched between the plurality of convex portions 21. The main body 2 has a plurality of concave portions 22. The plurality of concave portions 22 are arranged, for example, in a staggered pattern on the upper surface 1a.

[0035] The main body 2 has an uneven structure formed on the upper surface 1a, so that the user can feel softness when placing the user's head on the pillow 1. This reduces strain on the user's neck even when the user sleeps for a long time with the user's head placed on the pillow 1.

[0036] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a bottom view of the main body 2. The main body 2 has a lower surface 2b that constitutes a part of the lower surface 1b. The main body 2 has a first recess 2c recessed upward from the lower surface 2b and a second recess 2d recessed upward from the lower surface 2b. The first recess 2c is aligned with the second recess 2d along the first direction D1. The first recess 2c has a shape corresponding to the first neck plate 3. The second recess 2d has a shape corresponding to the second neck plate 4.

[0037] The main body 2 has a first protrusion 2e provided in the first recess 2c. The first protrusion 2e protrudes downward when the lower surface 2b faces downward. The first protrusion 2e is located, for example, at the center in the second direction D2. The first protrusion 2e extends in the first direction D1. The length of the first protrusion 2e in the first direction D1 is longer than the length of the first protrusion 2e in the second direction D2. The main body 2 has a second protrusion 2f provided in the second recess 2d. For example, the shape and arrangement of the second protrusion 2f are similar to those of the first protrusion 2e. For example, the second protrusion 2f is larger than the first protrusion 2e. In this case, the length of the second protrusion 2f in the first direction D1 may be longer than the length of the first protrusion 2e in the first direction D1, or the length of the second protrusion 2f in the second direction D2 may be longer than the length of the first protrusion 2e in the second direction D2. The length of the second protrusion 2f in the third direction D3 may be longer than the length of the first protrusion 2e in the third direction D3.

[0038] The first neck plate 3 and the second neck plate 4 will be described with reference to FIGS. 4 and 6. FIG. 6 is a perspective view of the first neck plate 3 and the second neck plate 4. The first neck plate 3 is disposed in the central portion 2a. The first neck plate 3 is disposed below the main body portion 2. The first neck plate 3 is housed in the first recess 2c. The first neck plate 3 is located between the reference line L (see FIG. 2) and the long side 1d. For example, the first neck plate 3 is located at the center of the central portion 2a in the first direction D1, i.e., away from the reference line L. The first neck plate 3 is located near an end of the central portion 2a in the first direction D1, for example. The distance from the first neck plate 3 to the reference line L is longer than the distance from the first neck plate 3 to the long side 1d.

[0039] The first neck plate 3 is attached to the main body 2 by, for example, an adhesive. The adhesive is, for example, a water-soluble adhesive. The first neck plate 3 is made of a flexible material. The hardness of the first neck plate 3 is higher than the hardness of the main body 2. The first neck plate 3 is made of, for example, urethane foam, latex foam, or mumaku urethane foam. The rebound resilience of the first neck plate 3 is 35% or more and 60% or less.

[0040] For example, the material of the main body 2 may be the same as the material of the first neck plate 3. In this case, the first neck plate 3 may be made of the same material as the material of the main body 2, and the density of the first neck plate 3 may be higher than the density of the main body 2, thereby making the hardness of the first neck plate 3 higher than the hardness of the main body 2. Unlike the above example, the material of the main body 2 may be different from the material of the first neck plate 3. In this case, the hardness of the material of the first neck plate 3 may be higher than the hardness of the material of the main body 2, thereby making the hardness of the first neck plate 3 higher than the hardness of the main body 2.

[0041] The first neck plate 3 extends in the first direction D1 and the second direction D2. The length of the first neck plate 3 in the second direction D2 is longer than the length of the first neck plate 3 in the first direction D1. The first neck plate 3 has a thickness in the third direction D3. The first neck plate 3 has a contact surface 3a facing upward and a bottom surface 3b facing the opposite side from the contact surface 3a. The contact surface 3a is the surface that comes into contact with the main body 2 when the first neck plate 3 is housed in the first recess 2c. The first neck plate 3 has a first portion 31 located at the center of the first neck plate 3 in the second direction D2 and a second portion 32 adjacent to the first portion 31 in the second direction D2. The first neck plate 3 has a pair of second portions 32. The first portion 31 is located between the pair of second portions 32.

[0042] The first portion 31 has a saddle-like shape. That is, the first portion 31 has a shape that protrudes upward toward both ends of the first portion 31 in the second direction D2. The first portion 31 curves upward when viewed from the second direction D2. The length of the first portion 31 in the third direction D3 increases as the first portion 31 approaches the center of the first portion 31 in the first direction D1. That is, the first portion 31 rises as the first portion 31 approaches the center in the first direction D1. The first portion 31 is recessed downward when viewed from the first direction D1. The length of the first portion 31 in the third direction D3 decreases as the first portion 31 approaches the center of the first portion 31 in the second direction D2.

[0043] The first neck plate 3 has a first groove 3c (groove) provided in the first portion 31. The first groove 3c is provided in the contact surface 3a. The first groove 3c is recessed downward in the contact surface 3a. The first groove 3c is provided, for example, in the center of the first portion 31 in the second direction D2. The first groove 3c extends in the first direction D1. The length of the first groove 3c in the first direction D1 is longer than the length of the first groove 3c in the second direction D2. The bottom surface of the first groove 3c curves upward when viewed from the second direction D2. That is, the bottom surface of the first groove 3c is raised when viewed along the second direction D2. A first protrusion 2e provided in the first recess 2c of the main body 2 fits into the first groove 3c.

[0044] 7 is a plan view showing the first neck plate 3 and the second neck plate 4. As shown in Fig. 7, for example, the first neck plate 3 and the second neck plate 4 have a butterfly shape (or a gourd shape). The length of the first portion 31 in the first direction D1 becomes shorter as it approaches the center of the first portion 31 in the second direction D2.

[0045] The first portion 31 has a portion 31a that is recessed most inward in the first direction D1 of the first portion 31. The first portion 31 has a pair of portions 31a. One of the pair of portions 31a is provided at an end of the first portion 31 in the first direction D1, and the other is provided at an end of the first portion 31 opposite the end. The pair of portions 31a sandwich the first groove 3c. The position of one portion 31a in the second direction D2 coincides with the position of the other portion 31a in the second direction D2, for example. The length of the first portion 31 in the first direction D1 is shortest at the position of the pair of portions 31a. The length of the first portion 31 in the third direction D3 is shortest at the position of the pair of portions 31a.

[0046] As shown in FIG. 6, the second portion 32 has an upwardly bulging shape. The second portion 32 is curved upward when viewed in the first direction D1. The second portion 32 is curved upward when viewed in the second direction D2. The second portion 32 has an apex 32a, which is the portion farthest from the lower surface 3b. The apex 32a is located, for example, at the center of the second portion 32 in the first direction D1. The apex 32a is located, for example, at the center of the second portion 32 in the second direction D2. The length of the second portion 32 in the third direction D3 increases as it approaches the apex 32a.

[0047] As shown in FIGS. 6 and 7 , the length of the second portion 32 in the first direction D1 increases, for example, as it approaches the center of the second portion 32 in the second direction D2. The second portion 32 has a portion 32b that bulges outward most in the first direction D1 of the second portion 32. The second portion 32 has a pair of portions 32b. One of the pair of portions 32b is provided at an end of the second portion 32 in the first direction D1, and the other is provided at an end of the second portion 32 opposite the end. The position of one of the pair of portions 32b in the second direction D2, for example, coincides with the position of the other of the pair of portions 32b in the second direction D2. The length of the second portion 32 in the first direction D1 is longest at the position of the pair of portions 32b. The position of the portion 32b in the second direction D2 coincides with the position of the apex 32a in the second direction D2, for example.

[0048] The first neck plate 3 has an M-shape when viewed from the first direction D1. The first neck plate 3 has a recess, which is a portion where the length of the first neck plate 3 in the third direction D3 becomes shorter as it approaches the center in the second direction D2 of the first neck plate 3. In this embodiment, the first portion 31, which becomes lower as it approaches the center in the second direction D2, corresponds to the recess.

[0049] As shown in FIG. 4, the second neck plate 4 is disposed in the central portion 2a. The second neck plate 4 is disposed below the main body portion 2. The second neck plate 4 is accommodated in the second recess 2d. Like the first neck plate 3, the second neck plate 4 is attached to the main body portion 2, for example, with an adhesive. The second neck plate 4 is aligned with the first neck plate 3 along the first direction D1. The second neck plate 4 is located between the reference line L (see FIG. 2) and the long side 1d. The first neck plate 3 is located between the reference line L and one of the long sides 1d, and the second neck plate 4 is located between the reference line L and the other long side 1d. The reference line L is located between the first neck plate 3 and the second neck plate 4. The second neck plate 4 is, for example, located at the center of the central portion 2a in the first direction D1, i.e., away from the reference line L. The second neck plate 4 is, for example, located near an end of the central portion 2a in the first direction D1. The distance from the second neck plate 4 to the other long side 1d is longer than the distance from the second neck plate 4 to the reference line L.

[0050] The second neck plate 4 is made of a flexible material, similar to the first neck plate 3, and has a rebound resilience of 35% or more and 60% or less. The hardness of the second neck plate 4 is higher than that of the main body 2. The hardness of the second neck plate 4 is higher than that of the first neck plate 3. The second neck plate 4 is made of, for example, urethane foam, latex foam, or mumaku urethane foam.

[0051] For example, the material of the main body 2 may be the same as the material of the second neck plate 4. For example, the material of the second neck plate 4 may be the same as the material of the first neck plate 3. In this case, the second neck plate 4 may be made of the same material as the material of the first neck plate 3, and the density of the second neck plate 4 may be higher than the density of the first neck plate 3, thereby making the hardness of the second neck plate 4 higher than the hardness of the first neck plate 3. Unlike the above example, the material of the second neck plate 4 may be different from the material of the first neck plate 3. In this case, the hardness of the material of the second neck plate 4 may be higher than the hardness of the material of the first neck plate 3, thereby making the hardness of the second neck plate 4 higher than the hardness of the first neck plate 3.

[0052] The second neck plate 4 has, for example, the same shape as the first neck plate 3. The second neck plate 4 has a contact surface 4a facing upward and a bottom surface 4b facing the opposite side to the contact surface 4a. The contact surface 4a is the surface that comes into contact with the main body 2. As shown in FIGS. 6 and 7 , the second neck plate 4 has, for example, a third portion 41 similar to the first portion 31 of the first neck plate 3 and a fourth portion 42 similar to the second portion 32 of the first neck plate 3.

[0053] The second neck plate 4 has a second groove 4c similar to the first groove 3c of the first neck plate 3. A second protrusion 2f provided in the second recess 2d fits into the second groove 4c. The third portion 41 has a portion 41a, and the fourth portion 42 has a portion 42b. The portions 41a and 42b are similar to the portions 31a and 32b, respectively, of the first neck plate 3 described above. Furthermore, the fourth portion 42 has an apex 42a similar to the apex 32a of the second portion 32.

[0054] 7 and 8, examples of the size of the first neck plate 3 and the size of the second neck plate 4 will be described in more detail. FIG. 8 is a side view of the first neck plate 3 and the second neck plate 4. The second neck plate 4 is larger than the first neck plate 3. "The second neck plate is larger than the first neck plate" means that the length of the second neck plate is longer than the length of the first neck plate in at least one direction. "The second neck plate is larger than the first neck plate" may mean that the length of the second neck plate is larger than the length of the first neck plate, the width of the second neck plate is larger than the width of the first neck plate, or the height (thickness) of the second neck plate is larger than the height of the first neck plate. In this embodiment, the second neck plate 4 may be larger than the first neck plate 3 in at least one of the first direction D1, the second direction D2, and the third direction D3.

[0055] For example, the size of the first neck plate 3 and the size of the second neck plate 4 may be designed according to the body size of a child during the growth period. As an example, the size of the first neck plate 3 may be designed according to the body size of a child before the second growth period (or in the lower grades of elementary school), and the size of the second neck plate 4 may be designed according to the body size of a child during the second growth period (or in the upper grades of elementary school).

[0056] The volume of the second neck plate 4 is larger than the volume of the first neck plate 3. The length of the second neck plate 4 in the second direction D2 is longer than the length of the first neck plate 3 in the second direction D2. The length of the second neck plate 4 in the third direction D3 is longer than the length of the first neck plate 3 in the third direction D3. The length of the third portion 41 in the third direction D3 at the center in the second direction D2 is longer than the length of the first portion 31 in the third direction D3 at the center in the second direction D2. That is, the height of the lowest portion of the second neck plate 4 is higher than the height of the lowest portion of the first neck plate 3. The distance between the highest portion of the bottom surface of the second groove 4c and the lower surface 4b is longer than the distance between the highest portion of the bottom surface of the first groove 3c and the lower surface 3b. The distance between the apex 42a and the lower surface 4b of the fourth portion 42 is longer than the distance between the apex 32a and the lower surface 3b of the second portion 32.

[0057] The length in the first direction D1 of the third portion 41 at the center in the second direction D2 is longer than the length in the first direction D1 of the first portion 31 at the center in the second direction D2. That is, the length in the first direction D1 of the narrowest portion of the second neck plate 4 is longer than the length in the first direction D1 of the narrowest portion of the first neck plate 3. The length in the first direction D1 of the fourth portion 42 at portion 42b is longer than the length in the first direction D1 of the second portion 32 at portion 32b. That is, the length in the first direction D1 of the most expanded portion of the second neck plate 4 is longer than the length in the first direction D1 of the most expanded portion of the first neck plate 3.

[0058] As described above, the second neck plate 4 has a shape obtained by enlarging the first neck plate 3 along each of the first direction D1, the second direction D2, and the third direction D3. The ratio of the length of the first neck plate 3 in the second direction D2 to the length of the second neck plate 4 in the second direction D2 may be equal to or different from the ratio of the length of the first neck plate 3 in the first direction D1 to the length of the second neck plate 4 in the first direction D1.

[0059] The ratio of the length of the first neck plate 3 in the third direction D3 to the length of the second neck plate 4 in the third direction D3 may be equal to or different from the ratio of the length of the first neck plate 3 in the first direction D1 to the length of the second neck plate 4 in the first direction D1. The ratio of the length of the first neck plate 3 in the third direction D3 to the length of the second neck plate 4 in the third direction D3 may be equal to or different from the ratio of the length of the first neck plate 3 in the second direction D2 to the length of the second neck plate 4 in the second direction D2. As described above, the shape of the first neck plate 3 may or may not be similar to the shape of the second neck plate 4.

[0060] The maximum height of the pillow 1 in the side region R2 shown in Fig. 3 is, for example, 55 mm or more and 75 mm or less (60 mm as an example). The height of the pillow 1 in the part of the central region R1 where the first neck plate 3 is located below the main body 2 is smaller than the height of the pillow 1 in the part of the central region R1 where the second neck plate 4 is located below the main body 2.

[0061] In the central region R1, the maximum height of the pillow 1 in the portion where the first neck plate 3 is located below the main body 2 is, for example, 45 mm or more and 55 mm or less (50 mm, as an example). In the central region R1, the maximum height of the pillow 1 in the portion where the second neck plate 4 is located below the main body 2 is, for example, 55 mm or more and 65 mm or less (60 mm, as an example). In the central region R1, the maximum height of the pillow 1 in the portion where neither the first neck plate 3 nor the second neck plate 4 is located below the main body 2 (between the first neck plate 3 and the second neck plate 4) is 25 mm or more and 35 mm or less (30 mm, as an example).

[0062] The length in the first direction D1 of the neck rest portion when the pillow 1 is placed so that the first neck plate 3 faces downward in a plan view is smaller than the length in the first direction D1 of the neck rest portion when the pillow 1 is placed so that the second neck plate 4 faces downward in a plan view. The length in the first direction D1 of the neck rest portion when the pillow 1 is placed so that the first neck plate 3 faces downward in a plan view is, for example, 75 mm or more and 85 mm or less (80 mm as one example). The length in the first direction D1 of the neck rest portion when the pillow 1 is placed so that the second neck plate 4 faces downward in a plan view is, for example, 90 mm or more and 100 mm or less (95 mm as one example).

[0063] The height-adjustable sheet S will be described with reference to FIG. 9. The height-adjustable sheet S is a sheet material for adjusting the height that is added to the pillow 1 when, for example, the user feels that the pillow 1 is not high enough. FIG. 9 is a perspective view of the pillow 1 and the height-adjustable sheet S. The height-adjustable sheet S has a first sheet S1, a second sheet S2, a third sheet S3, and a fourth sheet S4. The first sheet S1, the second sheet S2, the third sheet S3, and the fourth sheet S4 are made of, for example, a flexible material. As an example, the first sheet S1, the second sheet S2, the third sheet S3, and the fourth sheet S4 are made of HKE (high hardness urethane foam).

[0064] The first sheet S1 is a sheet that comes into contact with the lower surface 1b of the pillow 1. The first sheet S1 adjusts, for example, the overall height of the pillow 1. The first sheet S1 has the same shape as the lower surface 1b of the pillow 1 in a plan view (when viewed along the third direction D3). The length of the first sheet S1 in the third direction D3 is shorter than the length of the pillow 1 in the third direction D3. The length of the first sheet S1 in the first direction D1 is, for example, 340 mm. The length of the first sheet S1 in the second direction D2 is, for example, 590 mm. The length of the first sheet S1 in the third direction D3 is, for example, 10 mm. In other words, the height (thickness) of the first sheet S1 is 1 cm.

[0065] The first sheet S1 has a through-hole S1a. The through-hole S1a penetrates the first sheet S1 in the third direction D3. The through-hole S1a is provided, for example, at a position corresponding to the through-hole 1e of the pillow 1. The through-hole S1a is located below the through-hole 1e of the pillow 1 when the pillow 1 is placed on the first sheet S1.

[0066] The height-adjustable sheet S includes a pair of second sheets S2. The second sheets S2 adjust the height of the pillow 1 in the side regions R2, for example. The second sheets S2 have the same shape as the side regions R2 in a plan view, for example. The length of the second sheets S2 in the third direction D3 is shorter than the length of the pillow 1 in the third direction D3. The length of the second sheets S2 in the third direction D3 is equal to the length of the first sheet S1 in the third direction D3, for example. The length of the second sheets S2 in the first direction D1 is 365 mm, for example. The length of the first sheet S1 in the second direction D2 is 200 mm, for example.

[0067] The second sheet S2 has a through hole S2a. The second sheet S2 has a plurality of through holes S2a. The through holes S2a penetrate the second sheet S2 in the third direction D3. The through holes S2a are provided at positions corresponding to the through holes 1e provided in the side regions R2. The through holes S2a are located below the through holes 1e provided in the side regions R2 of the pillow 1 when the pillow 1 is placed on the second sheet S2.

[0068] The height-adjustable sheet S includes a pair of third and fourth sheets S3 and S4. The third sheet S3 adjusts the height of the portion of the pillow 1 on which the neck or top of the head is placed, for example. The fourth sheet S4 adjusts the height of the central portion of the pillow 1 in a plan view. The fourth sheet S4 has a plurality of through-holes S4a. The through-holes S4a penetrate the fourth sheet S4 in the third direction D3. The through-holes S4a are provided at positions corresponding to the through-holes 1e provided in the central region R1. The through-holes S4a are located below the through-holes 1e provided in the central region R1 of the pillow 1 when the pillow 1 is placed on the fourth sheet S4.

[0069] The pair of third sheet S3 and fourth sheet S4 are arranged along the first direction D1. More specifically, the third sheet S3, the fourth sheet S4, and the third sheet S3 are arranged in this order along the first direction D1. When the pair of third sheet S3 and fourth sheet S4 are arranged along the first direction D1, the overall outline of the pair of third sheet S3 and fourth sheet S4 has, for example, the same shape as the central region R1 in a plan view.

[0070] The length in the third direction D3 of the third sheet S3 is, for example, equal to the length in the third direction D3 of the first sheet S1. The length in the third direction D3 of the fourth sheet S4 is, for example, equal to the length in the third direction D3 of the first sheet S1. The length in the first direction D1 of the third sheet S3 is, for example, 85 mm. The length in the second direction D2 of the third sheet S3 is, for example, 170 mm. The length in the first direction D1 of the fourth sheet S4 is, for example, 130 mm. The length in the second direction D2 of the fourth sheet S4 is, for example, 170 mm.

[0071] The height-adjustable sheet S is used, for example, housed in a stain-preventive cover together with the pillow 1. In the internal space of the stain-preventive cover, the first sheet S1 is placed on top of the second sheet S2, third sheet S3, and fourth sheet S4, and the pillow 1 is placed on top of the first sheet S1. The height-adjustable sheet S may be used in a state in which the height-adjustable sheet S, from which at least one of the first sheet S1, second sheet S2, third sheet S3, and fourth sheet S4 has been removed, is housed in the stain-preventive cover together with the pillow 1. In other words, the user can freely select which of the first sheet S1, second sheet S2, third sheet S3, and fourth sheet S4 to use.

[0072] The height of the height-adjustable sheet S, which includes all of the first sheet S1, second sheet S2, third sheet S3, and fourth sheet S4, placed under the pillow 1 will be described below. Hereinafter, the length from the underside of the height-adjustable sheet S to the upper surface 1a of the pillow 1 will be referred to as the "height of the pillow with sheet." The maximum height of the pillow with sheet in the side regions R2 is, for example, 75 mm or more and 85 mm or less (80 mm as an example). The maximum height of the pillow with sheet in the central region R1, where the first neck plate 3 is located below the main body 2, is, for example, 65 mm or more and 75 mm or less (70 mm as an example). The maximum height of the pillow with sheet in the central region R1, where the second neck plate 4 is located below the main body 2, is, for example, 75 mm or more and 85 mm or less (80 mm as an example). In the central region R1, the maximum height of the pillow with sheet in the part where neither the first neck plate 3 nor the second neck plate 4 is located below the main body 2 (between the first neck plate 3 and the second neck plate 4) is, for example, 45 mm or more and 55 mm or less (50 mm, as an example).

[0073] Next, the effects and advantages obtained from the pillow 1 according to this embodiment will be described. As shown in FIGS. 3 and 4, in the pillow 1, the first neck plate 3 and the second neck plate 4 are disposed in the central portion 2a, which is located at the center of the main body portion 2 in the second direction D2. Therefore, when a user places their head at the center of the main body portion 2 in the second direction D2, the user's head is supported by the main body portion 2, and their neck is supported by at least one of the first neck plate 3 and the second neck plate 4. The first neck plate 3 and the second neck plate 4 are aligned along the first direction D1. A reference line L that crosses the center of the central portion 2a in the first direction D1 in the second direction D2 is located between the first neck plate 3 and the second neck plate 4. In other words, the first neck plate 3 is located on the opposite side of the reference line L from the side on which the second neck plate 4 is located. By changing the orientation of the pillow 1 in the first direction D1, it is possible to select whether the first neck plate 3 or the second neck plate 4 is positioned below the user's cervical vertebrae. The hardness of the first neck plate 3 and the second neck plate 4 is greater than the hardness of the main body 2. Therefore, when the user places his / her head on the pillow 1, the main body 2 provides a feeling of softness to the user, and at least one of the first neck plate 3 and the second neck plate 4 supports the user's neck.

[0074] The second neck plate 4 is larger than the first neck plate 3. Therefore, if the user is a child whose head is light and whose cervical vertebrae are short, the resistance force that the user's neck receives from the first neck plate 3 can be reduced when the neck is placed on the small first neck plate 3, and the pillow 1 can be appropriately deformed to fit the user's head. In addition, because the first neck plate 3 is small, it can support the user's neck at a low position to suit a short cervical vertebrae.

[0075] On the other hand, if the user is a child whose head is heavy and whose cervical vertebrae are long, the user's head will not sink too much when placed on the large second neck plate 4. Furthermore, the large size of the second neck plate 4 allows the user's neck to be supported at a high position suitable for a long cervical vertebrae. As a result, a comfortable sleeping experience can be continuously provided even for children whose head weight fluctuates greatly and whose cervical vertebrae fluctuate greatly.

[0076] The hardness of the second neck plate 4 is higher than that of the first neck plate 3. When the neck of a user with a light weight is placed on the first neck plate 3, the first neck plate 3 can be appropriately deformed. On the other hand, when the neck of a user with a heavy head is placed on the second neck plate 4, the second neck plate 4 can more reliably support the user's neck.

[0077] The main body 2 has an uneven structure formed on the upper surface 1a, which is the surface of the main body 2 that is located above the first neck plate 3. When the user places their head on the pillow, the uneven structure deforms appropriately, allowing the user to feel a sense of softness.

[0078] 7 and 8, the first neck plate 3 has a recess (first portion 31) in which the length of the first neck plate 3 in the third direction D3 decreases toward the center of the first neck plate 3 in the second direction D2. By forming a recess recessed downward in the contact surface 3a, which is the upper surface of the first neck plate 3, the shape of the first neck plate 3 can be made to approximate the shape of the user's neck. As a result, the first neck plate 3 can more reliably support the user's neck.

[0079] The first neck plate 3 has a first groove 3c recessed downward on the contact surface 3a with the main body 2, and the first groove 3c extends in a first direction D1. The user's cervical vertebrae can be accommodated in the first groove 3c of the first neck plate 3, so that the area around the user's cervical vertebrae can be supported by the first neck plate 3. This prevents the first neck plate 3 from applying a concentrated resistance force to the user's cervical vertebrae.

[0080] The first neck plate 3 has a rebound resilience of 35% or more and 60% or less, the main body 2 has a rebound resilience of 10% or more and 35% or less, and the 40% hardness of the main body 2 is 60N or less. The 40% hardness of the main body 2 is 60N or less, which allows the user to feel softness. The main body 2 has a rebound resilience of 10% or more and 35% or less, which allows the main body 2 to sink appropriately when the user's head is placed on the main body 2. The first neck plate 3 has a rebound resilience of 35% or more and 60% or less, which prevents the main body 2 from sinking too much due to the weight of the user's head.

[0081] 7 and 8, the second neck plate 4 has a recess (third portion 41) in which the length of the second neck plate 4 in the third direction D3 decreases toward the center of the second neck plate 4 in the second direction D2. In this case, by forming a recess recessed downward in the contact surface 4a, which is the upper surface of the second neck plate 4, the shape of the second neck plate 4 can be made to approximate the shape of the user's neck. As a result, the second neck plate 4 can more reliably support the user's neck.

[0082] The second neck plate 4 has a second groove 4c recessed downward in the contact surface 4a with the main body 2, and the second groove 4c extends in the first direction D1. The user's cervical vertebrae can be accommodated in the second groove 4c of the second neck plate 4, so that the area around the user's cervical vertebrae can be supported by the second neck plate 4. This prevents the second neck plate 4 from applying a concentrated resistance force to the user's cervical vertebrae.

[0083] The rebound resilience of the second neck plate 4 is 35% or more and 60% or less, the rebound resilience of the main body 2 is 10% or more and 35% or less, and the 40% hardness of the main body 2 is 60 N or less. By setting the rebound resilience of the second neck plate 4 to 35% or more and 60% or less, excessive sinking due to the load of the user's head can be suppressed.

[0084] In this embodiment, the pillow 1 includes a second neck plate 4 having a shape similar to that of the first neck plate 3. The "similar shape" may be a similar shape, or may be a shape obtained by enlarging or reducing at least one of the first direction D1, the second direction D2, and the third direction D3. The second neck plate 4 provides the same effects as those of the first neck plate 3 described above.

[0085] The above describes embodiments of the pillow according to the present disclosure. However, the pillow according to the present disclosure is not limited to the above-described embodiments, and may be further modified within the scope of the gist described in the claims. The shape, size, material, number, and arrangement of each part of the pillow according to the present disclosure can be changed as appropriate within the scope of the above-described gist.

[0086] In the pillow 1 described above, an example has been described in which the second neck plate 4 has a shape obtained by enlarging the first neck plate 3 along each of the first direction D1, the second direction D2, and the third direction D3. However, the volume of the second neck plate 4 may be larger than the volume of the first neck plate 3, and a portion of the second neck plate 4 may be smaller than a corresponding portion of the first neck plate 3. As a specific example, the second groove 4c of the second neck plate 4 may be smaller than the first groove 3c of the first neck plate 3.

[0087] For example, the volume of the second neck plate 4 may be larger than the volume of the first neck plate 3, and the length in the first direction D1 of the second neck plate 4 may be shorter than the length in the first direction D1 of the first neck plate 3. For example, the volume of the second neck plate 4 may be larger than the volume of the first neck plate 3, and the length in the second direction D2 of the second neck plate 4 may be shorter than the length in the second direction D2 of the first neck plate 3. For example, the volume of the second neck plate 4 may be larger than the volume of the first neck plate 3, and the length in the third direction D3 of the second neck plate 4 may be shorter than the length in the third direction D3 of the first neck plate 3.

[0088] In the pillow 1 described above, an example has been described in which the volume of the second neck plate 4 is larger than the volume of the first neck plate 3. However, the length of the second neck plate 4 in the third direction D3 may be longer than the length of the first neck plate 3 in the third direction D3, and the volume of the second neck plate 4 may be smaller than the volume of the first neck plate 3. The length of the second neck plate 4 in the second direction D2 may be longer than the length of the first neck plate 3 in the second direction D2, and the volume of the second neck plate 4 may be smaller than the volume of the first neck plate 3. The length of the second neck plate 4 in the first direction D1 may be longer than the length of the first neck plate 3 in the first direction D1, and the volume of the second neck plate 4 may be smaller than the volume of the first neck plate 3.

[0089] In the pillow 1 described above, an example has been described in which the first neck plate 3 and the second neck plate 4 are adhered to the main body portion 2. However, the manner in which the first neck plate 3 and the second neck plate 4 are attached to the main body portion 2 is not limited to the above example. For example, the first neck plate 3 and the second neck plate 4 may be attached to the main body portion 2 by recess-and-protrusion fitting. At least one of the first neck plate 3 and the second neck plate 4 may be detachable from the main body portion 2. Furthermore, in the above-mentioned embodiment, the pillow 1 is a child's pillow. However, the pillow according to the present disclosure may be a pillow other than a child's pillow, for example, a pillow for an adult. [Explanation of symbols]

[0090] 1…pillow, 1a…upper surface, 1b…lower surface, 1c…short side, 1d…long side, 1e…through hole, 1f…recess, 2…body, 2a…central portion, 2b…lower surface, 2c…first recess, 2d…second recess, 2e…first protrusion, 2f…second protrusion, 3…first neck plate, 3a…contact surface, 3b…lower surface, 3c…first groove, 4…second neck plate, 4a…contact surface, 4b…lower surface, 4c…second groove, 21…protrusion, 22…recess, 31…first portion, 31a …part, 32…second part, 32a…top, 32b…part, 41…third part, 41a…part, 42…fourth part, 42a…top, 42b…part, D1…first direction, D2…second direction, D3…third direction, L…baseline, R1…center area, R2…side area, S…height adjustment sheet, S1…first sheet, S1a…through hole, S2…second sheet, S2a…through hole, S3…third sheet, S4…fourth sheet, S4a…through hole.

Claims

1. a main body portion extending in both a first direction and a second direction intersecting the first direction and having a thickness in a third direction intersecting both the first direction and the second direction; a first neck plate disposed at a central portion of the main body portion in the second direction; a second neck plate disposed in the central portion and aligned with the first neck plate along the first direction; Equipped with the second neck plate is larger than the first neck plate; the hardness of the first neck plate and the hardness of the second neck plate are higher than the hardness of the main body portion; A pillow in which a reference line that crosses the center of the central portion in the first direction in the second direction is located between the first neck plate and the second neck plate.

2. The pillow of claim 1 , wherein the second neck plate has a harder hardness than the first neck plate.

3. The pillow according to claim 1 or 2, wherein the main body portion has an uneven structure formed on a surface of the main body portion that is located above the first neck plate.

4. 3. The pillow according to claim 1, wherein the first neck plate has a recess in which the length of the first neck plate in the third direction becomes shorter as it approaches the center of the first neck plate in the second direction.

5. the first neck plate has a groove recessed downward on a surface that contacts the main body portion, The pillow according to claim 1 or claim 2, wherein the groove extends in the first direction.

6. the first neck plate has a rebound resilience of 35% or more and 60% or less; The impact resilience of the main body is 10% or more and 35% or less, 3. The pillow according to claim 1, wherein the 40% hardness of the main body portion is 60N or less.

7. The pillow according to claim 1 or claim 2, wherein the second neck plate has a recess in which the length of the second neck plate in the third direction becomes shorter as it approaches the center of the second neck plate in the second direction.

8. the second neck plate has a groove recessed downward on a surface that contacts the main body portion, The pillow according to claim 1 or claim 2, wherein the groove extends in the first direction.

9. the second neck plate has a rebound resilience of 35% or more and 60% or less; The impact resilience of the main body is 10% or more and 35% or less, 3. The pillow according to claim 1, wherein the 40% hardness of the main body portion is 60N or less.

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