Mattress

Abstract

To provide a mattress capable of guiding to a preferable sleeping posture.SOLUTION: A mattress 12 includes wall parts 22, 22 formed in each of edge portions along a vertical direction in the mattress 12 and projecting to one of a thickness direction in the mattress 12. The mattress 12 includes a support part 24 formed across the two wall parts 22, 22 and becoming higher in one of the thickness direction of the mattress 12 from each of the wall parts 22, 22 toward a center part in a horizontal direction of the mattress 12.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This invention relates to a mattress.

Background Art

[0002] Many conventional mattresses for bedding are based on the basic design concept of maintaining the S-shaped curve of the spine even in the supine position when standing up, and development is being promoted aiming at improvements such as improvement of body pressure distribution under this basic concept. For example, the mattress of Patent Document 1 aims to improve the comfort by arranging foams with different hardnesses side by side in the longitudinal direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although the mattress of Patent Document 1 takes into consideration the user's longitudinal sleeping posture, nothing is considered about the user's lateral sleeping posture. If the user's lateral sleeping posture is poor, it may lead to a burden on the body, so improvement of the user's lateral sleeping posture is also required.

[0005] In view of the above problems in the prior art, the present invention is proposed to preferably solve these problems, and an object thereof is to provide a mattress that can induce a good sleeping posture.

Means for Solving the Problems

[0006] The first aspect of the mattress according to the present invention is formed on each of the edges along the longitudinal direction in the mattress, a wall portion protruding in one direction in the thickness direction of the mattress, and It is a gist of the invention to include a support portion that is formed across between the two wall portions and that rises in one direction in the thickness direction as it goes from each of the wall portions toward the center portion in the lateral direction of the mattress.

[0007] A second aspect of the mattress according to the present invention is, in the first aspect, the lateral contour in the support portion may be formed of only a curve.

[0008] A third aspect of the mattress according to the present invention is, in the second aspect, the lateral contour on the inner surfaces of the support portion and the wall portions may be formed of only one curve.

[0009] One aspect of the mattress according to the present invention is to arrange the mattress of the first aspect and a flat mattress side by side.

Advantages of the Invention

[0010] According to the mattress of the present invention, a user can be induced into a good sleeping posture.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

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Figure 10

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Mode for Carrying Out the Invention

[0012] Next, the mattress according to the present invention will be described below with reference to the accompanying drawings by giving preferred examples. It should be noted that the embodiments and drawings described below are examples of a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and can be appropriately changed without departing from the gist of the present invention.

Example

[0013] As shown in FIGS. 1 and 2, the mattress 10 according to the embodiment is configured by arranging two first mattresses 12 and one second mattress 14 side by side. The mattress 10 of the embodiment is a bedding mainly used when a person lies down, laid on a bed, a floor, etc. Here, in the mattress 10, the first mattress 12, and the second mattress 14, when there is no particular notice, the direction that becomes the direction of the body length when a person lies down is referred to as the longitudinal direction, and the direction that becomes the direction of the shoulder width when a person lies down is referred to as the lateral direction. Also, the direction that becomes the vertical direction when the mattress 10 is laid on a bed or the like is referred to as the thickness direction. In the mattress 10 according to the embodiment, one second mattress 14 is arranged side by side in the longitudinal direction with respect to the two first mattresses 12 arranged side by side in the longitudinal direction.

[0014] As shown in Fig. 9, the mattress 10 preferably forms a first region that mainly supports the upper side from the user's buttocks with the first mattress 12, and forms a second region that mainly supports the user's legs with the second mattress 14. The mattress 10 constitutes the first region by two first mattresses 12 arranged in the vertical direction, and constitutes the second region by one second mattress 14 arranged in the vertical direction of the two first mattresses 12.

[0015] As shown in Figs. 9 to 11, the mattress 10 of the embodiment is housed in the cover 16. The cover 16 is preferably formed of a fabric or the like, and preferably has flexibility and stretchability that do not interfere with the flexibility of the mattress 10 and functions due to the shape of the mattress 10. The cover 16 is formed by connecting three bag-shaped portions 18 with a connecting portion 18a. The bag-shaped portion 18 is a rectangular bag formed according to the first mattress 12 or the second mattress 14. The cover 16 has an opening / closing portion 20 such as a fastener on the side surface of each bag-shaped portion 18, and the first mattress 12 or the second mattress 14 is inserted into and taken out of the bag-shaped portion 18 from the opening / closing portion 20. In the cover 16 of the embodiment, one of the two connecting portions 18a connects the upper edges of adjacent bag-shaped portions 18, and the other of the two connecting portions 18a connects the lower edges of adjacent bag-shaped portions 18 (see Fig. 10). The mattress 10 of the embodiment can be changed between a deployed state in which the first mattress 12 and the second mattress 14 are arranged in the vertical direction (see Fig. 10(a)) and a folded state in which the first mattress 12 and the second mattress 14 are overlapped by folding at the connecting portion 18a (see Fig. 10(b)).

[0016] As shown in FIGS. 3 and 4, the first mattress 12 is formed at each of the edges along the longitudinal direction in the first mattress 12, and has wall portions 22 that protrude in one direction (the upper side in the embodiment) in the thickness direction of the first mattress 12, and is formed across between the two wall portions 22, and a support portion 24 that becomes higher in one direction (the upper side in the embodiment) in the thickness direction as it goes from each of the wall portions 22 toward the lateral center portion of the first mattress 12. In this way, one surface (the upper surface) of the first mattress 12 has a convex shape due to the left and right wall portions 22 and the support portion 24 formed between the left and right wall portions 22. Further, the contour of one surface (the upper surface) of the first mattress 12 changes in height in the lateral direction (see FIG. 7), but is constant in height in the longitudinal direction (see FIGS. 6 and 8). On the other hand, the other surface (the lower surface) of the first mattress 12 is flat as a whole (see FIGS. 5 to 8). Note that the first mattress 12 of the embodiment is formed symmetrically with respect to a virtual line passing through the lateral center.

[0017] As shown in FIG. 3, in the embodiment, the outer lateral surface of the wall portion 22 is formed as a flat vertical surface. Further, the inner lateral surface of the wall portion 22 is formed as a curved surface. That is, the contour of the inner surface of the wall portion 22 is formed only of a curve. Further, the upper surface of the wall portion 22 is flat, and the upper surface and the inner surface are connected by a curved surface. The wall portion 22 may be formed in a partial range of the edge along the longitudinal direction in the first mattress 12, but it is preferable to be formed across the entire edge along the longitudinal direction in the first mattress 12 as in the embodiment. The lateral width of the wall portion 22 is not particularly limited, but may be, for example, 15 mm or more.

[0018] As shown in FIGS. 3 and 7, the first mattress 12 includes one support portion 24 between the left and right wall portions 22, 22. Each of the lateral side edges of the support portion 24 is connected to the lower end of the inner surface of the left and right wall portions 22. And the lateral central portion of the support portion 24 is higher than each of the lateral side edges of the support portion 24. The lateral contour of the support portion 24 is formed only by a curve and changes to be lower as it goes from the lateral central portion to the lateral outside. The support portion 24 is an arc-shaped bulge whose circumference extends laterally. On the other hand, the vertical contour of the support portion 24 is formed only by a straight line and does not change in height depending on the vertical position (see FIG. 8). In the first mattress 12, the lateral contours on the inner surfaces of the support portion 24 and the wall portion 22 are formed by only one curve.

[0019] As shown in FIGS. 3 and 7, the lateral central portion of the support portion 24 is at the same position as the virtual plane connecting the tips of the left and right wall portions 22, and the highest part of the support portion 24 and the upper surface of the wall portion 22 are at the same height. The inclination angle α (see FIG. 3) formed by the virtual line connecting the highest lateral central portion of the support portion 24 and the lowest side edge of the support portion 24 and the horizontal plane is not particularly limited, but is about 4°. The first mattress 12 has the thinnest thickness at the position of the lowest side edge of the support portion 24. Here, the thickness at the thinnest position of the first mattress 12 is not particularly limited, but it is preferably, for example, 70 mm or more, and by doing so, it is possible to make it difficult to give the user a feeling of having a bottom. Also, the height difference between the highest lateral central portion and the lowest side edge of the support portion 24 is not particularly limited because it can be appropriately changed depending on the thickness of the first mattress 12, but it is preferably set to about 30 mm, for example. Incidentally, the first mattress 12 can form the wall portion 22 and the support portion 24, for example, by cutting one surface of a plate-like body.

[0020] As shown in FIG. 1, the second mattress 14 is a plate-shaped body with all surfaces being flat. The thickness of the second mattress 14 is the same as the thickness at the lateral center position of the support portion 24 and the thickness at the position of the wall portion 22 in the first mattress 12. Therefore, when the first mattress 12 and the second mattress 14 are arranged in the vertical direction, the height of the lateral center portion of the support portion 24 aligns with the height of the upper surface of the second mattress 14, and the height of the upper surface of the wall portion 22 aligns with the height of the upper surface of the second mattress 14 (see FIG. 1(b)).

[0021] The first mattress 12 and the second mattress 14 are preferably formed of polyurethane foam because they can be made lightweight and relatively inexpensive, but are not limited thereto, and may be olefin foams such as polyethylene, rubber foams, fibers, or other materials. Note that the first mattress 12 and the second mattress 14 in the embodiment are polyurethane foams. The first mattress 12 and the second mattress 14 may be formed of the same material as in the embodiment, or may be formed of different materials. The physical properties of the first mattress 12 and the second mattress 14, such as hardness and resilience, may be the same or different.

[0022] The physical properties of the first mattress 12 and the second mattress 14 are not particularly limited. For example, it is preferable that the apparent density (JIS K 7222) is in the range of 36 N to 44 N, the resilience (JIS K 6400-3) is 35% or more, and the hardness (JIS K 6400-2) is in the range of 120 N to 200 N. Also, the physical properties of the first mattress 12 and the second mattress 14 are not particularly limited. For example, it is preferable that the compression set (JIS K 6400-4) is 4.5% or less and the repeated compression set (JIS K 6400-4) is 5% or less.

[0023] As shown in Fig. 9, the mattress 10 is used by placing the upper part from the buttocks in the body on two first mattresses 12 arranged in the vertical direction and placing the legs on the second mattress 14. Since the first mattress 12 is provided with a support portion 24 that rises in one direction in the thickness direction as it goes from each of the left and right wall portions 22 toward the lateral center portion of the first mattress 12, when the user lies on their back at the lateral center portion of the mattress 10, the user's spine is supported at the top of the convex support portion 24 in the first mattress 12. In this way, by supporting the spine at the top of the support portion 24, it is possible to guide the spine to stretch, and a stretching effect can be obtained. Also, since the left and right scapulae of the user are supported on a surface lower than the top that supports the spine in the support portion 24, the user can expand their chest in the lateral direction. In this way, according to the first mattress 12 and the mattress 10 having the first mattress 12, the user can be guided to a good sleeping posture. And, by naturally guiding the user's sleeping posture so that the chest expands by the first mattress 12, there are various merits such as obtaining a stretching effect for improving hunched shoulders or making breathing easier.

[0024] Since the wall portion 22 protrudes from the lateral edge portion in the lateral direction of the first mattress 12, when the user turns over, it is possible to prevent the user from rolling by the wall portion 22. Therefore, even if it has a support portion 24 that slopes downward from the lateral center portion toward the outside in the lateral direction, it is possible to prevent the user from falling off the mattress 10.

[0025] When the mattress 10 forms an angular bending point, it is likely to tear from this bending point. In the first mattress 12, by forming the lateral contour of the support portion 24 only with a curve, since there is no angular bending point in the support portion 24, it is possible to make the support portion 24 difficult to be damaged. In particular, by forming the lateral contour on the inner surface of the support portion 24 and the wall portion 22 with only one curve, it is possible to make the inner surfaces of the support portion 24 and the wall portion 22 where the load is applied by the user difficult to be damaged.

[0026] When the mattress 10 is used by placing the upper part of the body above the buttocks on the first mattress 12 having the support part 24 and placing the legs on the flat second mattress 14 arranged side by side with the first mattress 12, the legs can be stabilized. For example, when the legs are placed on the first mattress 12 having the support part 24, the legs are laterally guided, so the position of the legs is not stable and the waist is burdened. That is, by placing the legs on the flat second mattress 14, the sleeping posture of the user can be stabilized. Also, by placing the upper part of the body above the buttocks on the first mattress 12 having the support part 24, the spine can be supported by the support part 24 from between the shoulder blades to the waist, so the sleeping posture of the user can be stabilized.

[0027] (Modified example) Not limited to the above-described matters, for example, it may be as follows. Note that the present invention is not limited only to the specific descriptions of the embodiments and the following modified examples. (1) In the embodiment, the first mattress and the second mattress are combined, but not limited to this, it may be configured only with the first mattress. (2) In the embodiment, two first mattresses and one second mattress are combined, but not limited to this, the first mattress may be one, or may be three or more. Also, the second mattress may be two. (3) In the embodiment, the lateral central part of the support part is at the same position as the virtual plane connecting the tips of the left and right wall parts, and the highest part in the support part and the upper surface of the wall part are at the same height, but not limited to this, the lateral central part of the support part may be located outside the virtual plane connecting the tips of the left and right wall parts (the lateral central part of the support part is higher than the wall part), or may be located inside the virtual plane connecting the tips of the left and right wall parts (the lateral central part of the support part is lower than the wall part). (4) In the embodiment, the lateral contour of the support part is formed only by a curve, but not limited to this, the lateral contour of the support part may be formed by combining a curve and a straight line, or may be formed by a straight line.

Explanation of reference numerals

[0028] 10 Mattress, 12 First Mattress (Mattress), 14 Second Mattress (Mattress), 22 Wall Portion, 24 Support Portion

Claims

1. A wall portion formed on each of the edges along the longitudinal direction of the mattress and protruding in one direction in the thickness direction of the mattress, and A support portion formed across between the two wall portions and rising in one direction in the thickness direction as it goes from each of the wall portions toward the center portion in the lateral direction of the mattress. The mattress includes the support portion.

2. The mattress according to claim 1, wherein the lateral contour of the support portion is formed only by a curve.

3. The mattress according to claim 2, wherein the lateral contour of the inner surface of the support portion and the wall portion is formed only by one curve.

4. A mattress in which the mattress according to claim 1 and a flat mattress are arranged side by side.

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