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

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[0001] This invention relates to a mattress.

Background Art

[0002] Many conventional mattresses for bedding are designed based on the fundamental idea of maintaining the S-shaped curve of the spine even in the supine position when standing up, and under this fundamental idea, development has been advanced aiming at improvements such as body pressure distribution. For example, the mattress of Patent Document 1 arranges foams with different hardnesses side by side in the vertical direction to improve the comfort of sleeping.

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 account the user's sleeping posture in the vertical direction, it does not consider anything about the user's sleeping posture in the horizontal direction. If the user's sleeping posture in the horizontal direction is poor, it may lead to a burden on the body, so it is required to improve the user's sleeping posture in the horizontal direction as well.

[0005] In view of the above problems related to the prior art, this 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 this invention is [[ID=第48]]formed on each of the edges along the vertical direction of the mattress, a wall portion protruding in one direction in the thickness direction of the mattress, and The gist of the invention is that it comprises a support portion formed between the two aforementioned wall portions, which increases in one direction in the thickness direction as it moves from each of the wall portions toward the lateral center of the mattress.

[0007] A second aspect of the mattress according to the present invention is, in the first aspect described above, The lateral contour of the support portion may be formed solely of curves.

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

[0009] One aspect of the mattress according to the present invention is: The gist of this invention is that the mattress according to the first embodiment and a flat mattress are placed side by side. [Effects of the Invention]

[0010] The mattress according to the present invention can guide the user into a good sleeping posture. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing a mattress according to an embodiment of the present invention, viewed from above. [Figure 2] This is a perspective view of the mattress in the example, taken from below. [Figure 3] This is a front view of the first mattress of the embodiment. The back view is shown in the same way as the front view. [Figure 4] This is a plan view showing the first mattress of the embodiment. [Figure 5] This is a bottom view showing the first mattress of the embodiment. [Figure 6] This is a right side view of the first mattress of the embodiment. The left side is shown in the same way as the right side. [Figure 7] This is a cross-sectional view along line AA in Figure 4. [Figure 8] Figure 4 is a cross-sectional view along line BB. [Figure 9] It is a plan view showing a state in which the mattress of the embodiment is stored in a cover. [Figure 10] It is a right side view showing a state in which the mattress of the embodiment is stored in a cover, (a) shows the unfolded state, and (b) shows the folded state. [Figure 11] (a) is a cross-sectional view taken along line C-C of FIG. 10, (b) is a cross-sectional view taken along line D-D of FIG. 10, (c) is a cross-sectional view taken along line E-E of FIG. 10, (d) is a cross-sectional view taken along line F-F of FIG. 10, and (e) is a view seen from arrow G of FIG. 10.

Mode for Carrying Out the Invention

[0012] Next, a suitable embodiment of the mattress according to the present invention will be described below with reference to the accompanying drawings. 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 FIG. 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 or a floor. Here, in the mattress 10, the first mattress 12, and the second mattress 14, unless otherwise specified, the direction that becomes the direction of the body length when a person lies down is called the longitudinal direction, and the direction that becomes the direction of the shoulder width when a person lies down is called the lateral direction. Further, the direction that becomes the vertical direction when the mattress 10 is laid on a bed or the like is called 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] <00As 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 such that it does 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-like portions 18 with a connecting portion 18a. The bag-like 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-like portion 18, and the first mattress 12 or the second mattress 14 is inserted into and removed from the bag-like portion 18 through 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-like portions 18, and the other of the two connecting portions 18a connects the lower edges of adjacent bag-like 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 Figures 3 and 4, the first mattress 12 includes wall portions 22 formed on each of the edges along the vertical direction of the first mattress 12, projecting to one side in the thickness direction of the first mattress 12 (the upper side in this embodiment), and support portions 24 formed between the two wall portions 22, increasing in height towards one side in the thickness direction (the upper side in this embodiment) as they move from each wall portion 22 toward the lateral center of the first mattress 12. Thus, one surface (top surface) of the first mattress 12 is convex due to the left and right wall portions 22 and the support portions 24 formed between the left and right wall portions 22. Furthermore, the contour of one surface (top surface) of the first mattress 12 changes in height in the lateral direction (see Figure 7), but remains constant in the vertical direction (see Figures 6 and 8). In contrast, the other surface (bottom surface) of the first mattress 12 is flat overall (see Figures 5 to 8). Note that the first mattress 12 in this embodiment is formed symmetrically across a virtual line passing through the lateral center.

[0017] As shown in Figure 3, in this embodiment, the lateral outer surface of the wall portion 22 is formed as a flat vertical surface. The lateral inner 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 solely of curves. Furthermore, the upper surface of the wall portion 22 is flat, and the upper surface and inner surface are connected by curved surfaces. The wall portion 22 may be formed in a portion of the edge along the vertical direction of the first mattress 12, but it is preferable to form it over the entire edge along the vertical direction of the first mattress 12, as in this embodiment. The lateral width of the wall portion 22 is not particularly limited, but it is preferable to have it be, for example, 15 mm or more.

[0018] As shown in Figures 3 and 7, the first mattress 12 has a support portion 24 between the left and right wall portions 22, 22. Each of the lateral edges of the support portion 24 is connected to the lower inner surface of the left and right wall portions 22. The lateral center of the support portion 24 is higher than each of the lateral edges of the support portion 24. The lateral contour of the support portion 24 is formed solely of curves and changes in height from the lateral center toward the lateral outer side. The support portion 24 is an arc-shaped bulge with a circumference extending in the lateral direction. In contrast, the vertical contour of the support portion 24 is formed solely of straight lines and does not change in height depending on the vertical position (see Figure 8). In the first mattress 12, the lateral contours on the inner surfaces of the support portion 24 and the wall portions 22 are formed by only one curve.

[0019] As shown in Figures 3 and 7, the lateral center of the support portion 24 is at the same position as the imaginary plane connecting the tips of the left and right wall portions 22, and the highest point of the support portion 24 is at the same height as the top surface of the wall portion 22. The inclination angle α (see Figure 3) formed by the imaginary line connecting the highest lateral center of the support portion 24 and the lowest side edge of the support portion 24 with the horizontal plane is not particularly limited, but is approximately 4°. The first mattress 12 is thinnest at the lowest side edge of the support portion 24. Here, the thickness of the first mattress 12 at the thinnest point is not particularly limited, but is preferably 70 mm or more, as this makes it less likely for the user to feel the bottom. The height difference between the highest lateral center of the support portion 24 and the lowest side edge of the support portion 24 can be appropriately changed by the thickness of the first mattress 12, so is not particularly limited, but is preferably set to approximately 30 mm. Furthermore, the first mattress 12 can be formed by, for example, cutting one side of a plate-like body to create the wall portion 22 and the support portion 24.

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

[0021] The first mattress 12 and the second mattress 14 are preferably made of polyurethane foam because they are lightweight and relatively inexpensive to produce, but they are not limited to this and may be made of olefin foam such as polyethylene, rubber foam or fibers, or other materials. In this example, the first mattress 12 and the second mattress 14 are made of polyurethane foam. The first mattress 12 and the second mattress 14 may be made of the same material as in this example, but they may also be made of different materials. The first mattress 12 and the second mattress 14 may have the same physical properties such as hardness and rebound elasticity, or they may have different physical properties.

[0022] The physical properties of the first mattress 12 and the second mattress 14 are not particularly limited, but for example, it is preferable that the apparent density (JIS K 7222) is in the range of 36N to 44N, the rebound elasticity (JIS K 6400-3) is 35% or more, and the hardness (JIS K 6400-2) is in the range of 120N to 200N. Furthermore, although the physical properties of the first mattress 12 and the second mattress 14 are not particularly limited, for example, it is preferable that the compressive residual strain (JIS K 6400-4) is 4.5% or less, and the repeated compressive residual strain (JIS K 6400-4) is 5% or less.

[0023] As shown in Figure 9, the mattress 10 is used by placing the upper part of the body, from the buttocks up, on the two vertically aligned first mattresses 12, and the legs on the second mattress 14. The first mattress 12 is equipped with support sections 24 that are raised on one side in the thickness direction as they move from each of the left and right wall sections 22 toward the horizontal center of the first mattress 12. Therefore, when the user lies supine in the horizontal center of the mattress 10, the user's spine is supported by the top of the convex support section 24 on the first mattress 12. By supporting the spine at the top of the support section 24 in this way, the spine can be guided to stretch, resulting in a stretching effect. In addition, since the user's left and right shoulder blades are supported by a lower surface of the support section 24 than the top of the support section that supports the spine, the user's chest can be expanded laterally. Thus, the first mattress 12 and the mattress 10 having the first mattress 12 can guide the user to a good sleeping posture. Furthermore, the first mattress 12 naturally guides the user's sleeping posture so that their chest is open, which offers various benefits, such as a stretching effect that improves rounded shoulders and makes breathing easier.

[0024] Since the wall portion 22 protrudes from the lateral side edge of the first mattress 12, the wall portion 22 can prevent the user from rolling over when they turn over in their sleep. Therefore, even if there is a support portion 24 that slopes downward from the lateral center toward the lateral outer side, it is possible to prevent the user from falling off the mattress 10.

[0025] Mattress 10 is prone to tearing at angular bending points. In the first mattress 12, by forming the lateral contour of the support portion 24 with only curves, there are no angular bending points in the support portion 24, making it less susceptible to damage. In particular, by forming the lateral contour of the inner surfaces of the support portion 24 and the wall portion 22 with only one curve, the inner surfaces of the support portion 24 and the wall portion 22, which are subjected to load from the user, are less susceptible to damage.

[0026] The mattress 10 can be used by placing the upper part of the body, above the buttocks, on the first mattress 12 which has support parts 24, and the legs on the flat second mattress 14 which is placed next to the first mattress 12, thereby stabilizing the legs. For example, if the legs are placed on the first mattress 12 which has support parts 24, the legs are guided laterally, so the position of the legs is unstable and a burden is placed on the lower back. In other words, by placing the legs on the flat second mattress 14, the user's sleeping posture can be stabilized. Also, by placing the upper part of the body, above the buttocks, on the first mattress 12 which has support parts 24, the spine can be supported from between the shoulder blades to the lower back by the support parts 24, thus stabilizing the user's sleeping posture.

[0027] (Example of change) In addition to the matters mentioned above, the following may also be applied, for example. Furthermore, the present invention is not limited to the embodiments and the specific modifications described below. (1) The embodiment uses a combination of the first mattress and the second mattress, but is not limited to this, and may consist of only the first mattress. (2) In the example, two first mattresses and one second mattress were combined, but the example is not limited to this; the first mattress may be one, or three or more. Also, the second mattress may be two. (3) In the embodiment, the lateral center of the support is at the same position as the imaginary plane connecting the tips of the left and right walls, and the highest part of the support is at the same height as the top surface of the wall. However, it is not limited to this, and the lateral center of the support may be located outside the imaginary plane connecting the tips of the left and right walls (the lateral center of the support is higher than the wall), or it may be located inside the imaginary plane connecting the tips of the left and right walls (the lateral center of the support is lower than the wall). (4) In the embodiment, the lateral contour of the support portion was formed using only curves, but the lateral contour of the support portion may be formed using a combination of curves and straight lines, or it may be formed using only straight lines. [Explanation of Symbols]

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

Claims

1. A wall portion is formed on each of the edges along the vertical direction of the mattress, and protrudes in one direction in the thickness direction of the mattress, A support portion is formed between the two wall portions and increases in one direction in the thickness direction as it moves from each of the wall portions toward the lateral center of the mattress, The wall portion and the support portion are formed from a single foam material. A mattress in which each of the inclined surfaces in the support section, which slope downward as they move outward in the lateral direction, is connected to the inner surfaces of the left and right walls by a curved surface.

2. The mattress according to claim 1, wherein the lateral contour of the support portion in one of the thickness directions is formed solely of curves, and the lateral contour of the inner surface of the wall portion is formed solely of curves.

3. A mattress comprising two first mattresses according to claim 1 or 2, wherein the maximum thickness at the lateral center of the support portion is the same as the thickness at the wall portion, arranged in the vertical direction, and one flat second mattress having the same thickness as the thickness at the wall portion, arranged in the vertical direction.

4. The mattress according to claim 3, wherein the first mattress and the second mattress are housed in each of the bag-shaped parts of a cover formed by connecting three bag-shaped parts with connecting parts.

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