mattress

Abstract

To provide a mattress that is easy to turn over.SOLUTION: An mattress includes: a support face in contact with a user's body; a plurality of first groove parts which extend along the shorter direction of the support face and which are the first depths in the depth from the support face; a plurality of second groove parts which extend along the longer direction of the support face and which are the second depths that are larger than the first depths in the depth from the support face; and a plurality of protrusions which are separated by the two adjoining first groove parts and by the two adjoining second groove parts. The protrusions have a top face, with the support face contained at least in a part of the top face.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] BACKGROUND ART Mattresses using soft foam have been known in the past (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-14737 Summary of the Invention [Problem to be solved by the invention]

[0004] The mattress of Patent Document 1 has grooves in the longitudinal and lateral directions of the mattress. The mattress of Patent Document 1 is divided into multiple zones, and the spacing between the longitudinal grooves varies for each zone. This makes the mattress easier to bend. However, Patent Document 1 does not disclose a mattress that takes into account turning over in sleep. The objective of this disclosure is to provide a new mattress that makes it easier to turn over in sleep. [Means for solving the problem]

[0005] A mattress according to one aspect of the present disclosure includes a support surface that contacts a user's body, a plurality of first grooves that extend along the short side of the support surface and have a first depth from the support surface, a plurality of second grooves that extend along the long side of the support surface and have a second depth from the support surface that is greater than the first depth, and a plurality of protrusions that are separated by two adjacent first grooves and two adjacent second grooves. The protrusions have a top surface that includes the support surface in at least a portion of the top surface.

[0006] With this mattress, the user's body comes into contact with the support surface included in the top surface of the protrusion, and the user turns over in the short-side direction. Furthermore, with this mattress, the second grooves extending in the long-side direction are deeper than the first grooves extending in the short-side direction. Therefore, the protrusions separated by the first and second grooves move more easily in the short-side direction than in the long-side direction. As a result, when the user turns over, the protrusions move in the short-side direction, making it easier to turn over. [Effects of the Invention]

[0007] According to the present disclosure, a new mattress that makes it easy to turn over in bed can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view of a mattress according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view showing section II of FIG. [Figure 3] Enlarged view of part A in Figure 2. [Figure 4] FIG. 2 is a cross-sectional view showing the II-II section of FIG. [Figure 5] Enlarged view of part B in Figure 4. [Figure 6] FIG. 10 is an enlarged cross-sectional view of a mattress in another embodiment. [Figure 7] 1 is a graph showing the relationship between deflection and load of a mattress according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is an enlarged longitudinal cross-sectional view of another embodiment of a mattress of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0010] As shown in FIG. 1 , the mattress 1 of the present disclosure is a generally rectangular mattress 1 in plan view extending in a longitudinal direction L and a lateral direction S. The mattress 1 is made of an elastically deformable soft foam. In this embodiment, the mattress 1 is made of polyurethane foam. A user of such a mattress 1 lies down in the longitudinal direction L and turns in the lateral direction S.

[0011] As shown in Figures 1 to 5, the mattress 1 comprises a support surface 2, a first groove portion 4, a second groove portion 6, a convex portion 8, a back surface 10, a concave portion 12, and a back surface convex portion 14.

[0012] The support surface 2 is the surface that comes into contact with the user. Therefore, the support surface 2 forms the upper end of the mattress 1 in the thickness T direction, and also serves as the surface of the mattress 1. The mattress 1 of this embodiment has a thickness of 100 mm. However, the thickness of the mattress 1 can be changed as appropriate.

[0013] The back surface 10 is the surface that is placed on a bed frame or the like. In this embodiment, the back surface 10 is provided with a plurality of approximately trapezoidal recesses 12. The recesses 12 extend from one end 1a to the other end 1b in the short direction S of the mattress 1, forming an uneven surface on the back surface 10. As shown in FIG. 3 , in this embodiment, the center of each recess 12 is positioned so that it overlaps with the bottom 4a of the first groove 4 in the thickness T direction. In other words, the recess 12 is located on the opposite side of the mattress 1 from the first groove 4. By providing an uneven surface on the back surface 10 in this manner, when the mattress 1 is placed on a bed frame or the like, the recesses 12 form a space between the mattress 1 and the bed frame, improving ventilation from the support surface 2 to the back surface 10. In addition, the back surface protrusions 14 formed alongside the recesses 12 on the back surface 10 deform when a load is applied to the support surface 2, generating stress in the mattress 1 at a different timing than the protrusions 8 on the front surface. As a result, when a load is applied to the support surface 2, the mattress 1 generates stress in multiple stages due to the convex portions 8 on the front surface and the convex portions 14 on the back surface.

[0014] The density of the polyurethane foam forming the mattress 1 is 15 to 100 kg / m 3The density of polyurethane foam is 25 to 60 kg / m 3 The density of the polyurethane foam is preferably 15 kg / m 3 If the density is smaller than this, it will be difficult to obtain sufficient hardness for the shaped mattress, and the durability will tend to be poor. On the other hand, if the density of the polyurethane foam is 100 kg / m 3 If it exceeds this, the weight of the entire mattress 1 will become too large and difficult to handle.

[0015] Furthermore, the polyurethane foam forming the mattress 1 is made of a material with a hardness of 50 to 400N. The hardness of the polyurethane foam is preferably 120 to 300N. The hardness of the polyurethane foam is more preferably 150N to 250N. In particular, the polyurethane foam forming the mattress 1 of this embodiment is preferably made of a base material with a hardness of more than 150N, from the standpoints of processability of the mattress 1 and ensuring a sinking feeling (stroke feeling) when the user lies down on it.

[0016] The resilience of the polyurethane foam forming the mattress 1 can be selected as appropriate, but a material with a resilience of 25% or more is used, and more preferably a material with a resilience of 40% or more. This improves the recovery of the protrusions 8 (ease of returning to their original shape) and improves the ease of turning over in bed.

[0017] As shown in Figures 1 and 2, the first groove portion 4 is a groove that extends along the short side direction S of the mattress 1 from one end 1a to the other end 1b in the short side direction S. The multiple first groove portions 4 absorb deformation of the mattress 1 by deforming in a direction that narrows the groove width when the mattress 1 is bent, and function as absorbing grooves that make the mattress 1 easier to bend. Such a mattress 1 may also be used in a bed that can be gagged up. For this reason, it is preferable that the mattress 1 follows the bed frame when the bed is gagged up. This ability of the mattress 1 to follow the bed frame is called gagging performance. The first groove portions 4 are provided to improve the gagging performance of the mattress 1.

[0018] A plurality of first groove portions 4 are provided in the longitudinal direction L. In this embodiment, the first first groove portion 4 is provided at a first interval D1 from one end 1c of the mattress 1 in the longitudinal direction L. The first interval D1 is also provided at the other end 1d of the mattress 1 in the longitudinal direction L. In this embodiment, the first interval D1 is approximately 150 mm. However, the first interval D1 can be changed as appropriate. Furthermore, in this embodiment, 22 first groove portions 4 are provided. However, the number of first groove portions 4 can be changed as appropriate depending on the gage performance.

[0019] 2 and 3, the plurality of first groove portions 4 are provided at a second distance D2 from the first first groove portion 4. In this embodiment, the second distance D2 is approximately 77 mm. However, the second distance D2 can be changed as appropriate depending on the size of the mattress 1, the hardness required of the mattress 1, the gage performance, etc.

[0020] As shown in FIG. 3 , the depth of the multiple first groove portions 4 from the support surface 2 is a first depth X1. The first depth X1 is the distance from the bottom 4a of the first groove portion 4 to the support surface 2. The bottom 4a of the first groove portion 4 has a curved surface. In this embodiment, the first depth X1 is 30 mm. However, the first depth X1 only needs to be shallower than the second depth X2 of the second groove portions 6 described below, and can be changed as appropriate depending on the thickness T of the mattress 1, the hardness required of the mattress 1, or the gage performance required of the mattress 1.

[0021] Furthermore, the first groove width W1, which is the groove width of the first groove portion 4 in this embodiment, is 1.0 mm or more, and more preferably 5.0 mm or more. In this embodiment, the first groove width W1 is 7.0 mm. However, the first groove width W1 can be changed as appropriate depending on the hardness required for the mattress 1 or the gagging performance required for the mattress 1. The larger the first groove width W1, the better the gagging performance.

[0022] 1 and 4, the second groove portions 6 are grooves that extend along the longitudinal direction L from one end 1c to the other end 1d of the mattress 1. The multiple second groove portions 6 function as deformation grooves that make it easier for the convex portions 8 to deform when the user turns over in their sleep.

[0023] A plurality of second groove portions 6 are provided in the short-side direction S. In this embodiment, the first second groove portion 6 is provided at a third interval D3 from one end 1c of the mattress 1 in the longitudinal direction L. The third interval D3 is also provided at the other end 1d of the mattress 1 in the longitudinal direction L. In this embodiment, the third interval D3 is approximately 125 mm. However, the third interval D3 can be changed as appropriate. Furthermore, in this embodiment, 13 second groove portions 6 are provided. However, the number of second groove portions 6 can be changed as appropriate depending on the length of the mattress 1 in the short-side direction.

[0024] As shown in Figure 5, the multiple second groove portions 6 are provided at a fourth interval D4 from the first second groove portion 6. In this embodiment, the fourth interval D4 is approximately 60 mm. However, the fourth interval D4 can be changed as appropriate depending on the length of the mattress 1 in the short direction, the hardness required of the mattress 1, etc.

[0025] The depth of the multiple second groove portions 6 from the support surface 2 is a second depth X2. The second depth X2 is the distance from the bottom 6a of the second groove portion 6 to the support surface 2. In this embodiment, the second depth X2 is 50 mm. However, as long as the second depth X2 is greater than the first depth X1 of the first groove portions 4 described above, it can be changed as appropriate depending on the thickness T of the mattress 1, the hardness required of the mattress 1, and the like.

[0026] Furthermore, the second groove width W2 of the second groove portion 6 in this embodiment is 1.0 mm or more, and more preferably 10.0 mm or more. In this embodiment, the second groove width W2 is 10.0 mm. However, the second groove width W2 can be changed as appropriate depending on the length of the mattress 1 in the short direction, the hardness required of the mattress 1, etc.

[0027] The first groove width W1 and the second groove width W2 are preferably 1.0 to 30 mm, and more preferably 5 to 15 mm. If the first groove width W1 and the second groove width W2 are narrower than 1.0 mm, when the protrusions 8 bend, the buffering between adjacent protrusions 8 becomes large. This makes it difficult for the protrusions 8 to exhibit the bending characteristics required of independent protrusions 8. Furthermore, when recovering from bending, friction with adjacent protrusions 8 may make it difficult for the protrusions 8 to return to their original position.

[0028] It is more preferable that the second groove width W2 be wider than the first groove width W1. By widening the second groove width W2, the protrusions 8 can easily collapse in the short direction S. This makes it easier for the protrusions 8 to return to their original shape due to the reaction force of the soft foam when the load is released by the user turning over in bed. Furthermore, when a load is applied by turning over in bed, the shape collapses and bends easily in accordance with the flexure of the soft foam.

[0029] As shown in FIG. 1, the protrusions 8 are portions separated by two adjacent first grooves 4 and two adjacent second grooves 6. Therefore, the mattress 1 has a plurality of protrusions 8 on its surface. The protrusions 8 have a top surface 8a, and at least a portion of the top surface 8a includes the support surface 2. The plurality of protrusions 8 receive a load from the support surface 2 that supports the user. In this way, by providing a plurality of protrusions 8, the load received by the support surface 2 is distributed among the plurality of protrusions 8. This distributes the load on the user, providing a comfortable sleep.

[0030] As shown in FIG. 3, when the mattress 1 is viewed in cross section II in the longitudinal direction L, the cross section of the protrusion 8 along the longitudinal direction L is the first cross section 8b. In this embodiment, the first cross section 8b is generally rectangular and includes cutouts 8c with rounded corners at the edges in the longitudinal direction L. Therefore, the length D5 of the protrusion 8 along the longitudinal direction L on the support surface 2 is smaller than the distance (same as the second interval D2) between two adjacent first grooves 4 at the bottom 4a (an example of a first position) that corresponds to the first depth X1 of the first grooves 4 from the support surface 2. In other words, the top surface 8a of the protrusion 8 includes a straight portion extending along the support surface 2 and a cutout 8c formed in a curved shape. The length D5 along the longitudinal direction L is the length of this straight portion. The notch 8c is a cutout portion of the edge of the protrusion 8 that contacts the first groove 4. The width of the first groove 4 becomes wider than the first groove width W1 as it extends toward the support surface 2, and the shape of the first cross section 8b of the protrusion 8 tapers toward the support surface 2. The cross-sectional shape of the notch 8c may be an upwardly convex curved surface as shown in FIG. 3, a downwardly convex curved surface, or a linear, so-called tapered shape. By providing the notch 8c in this way, interference between adjacent protrusions 8 is prevented, thereby improving gaging performance. However, it is sufficient that at least a portion of the top surface 8a extends along the support surface 2 in the longitudinal direction L.

[0031] As shown in FIG. 5, when the mattress 1 is viewed in a cross section II-II in the short-side direction S, the cross section of the protrusion 8 along the short-side direction S is the second cross section 8e. In this embodiment, the second cross section 8e has a rounded shape that combines an arc and straight lines that form the support surface 2. The radius of the arc portion of the second cross section 8e is larger than the radius of the cutout portion 8c. The protrusion 8 is likely to fall in the short-side direction due to the second groove portion 6. Therefore, by increasing the radius of the arc portion of the second cross section 8e, interference with adjacent protrusions 8 can be prevented when the user turns over. As a result, the protrusions 8 move more easily, making it easier for the user to turn over.

[0032] In this embodiment, the length in the longitudinal direction L of the protrusions 8 (the length D5 plus the length of the two cutouts 8c) is longer than the length in the lateral direction S of the protrusions 8 (the same length as the fourth distance D4-W2). In other words, the planar cross section of the protrusions 8 seen from above (from the support surface 2 side) is roughly rectangular, with the longitudinal direction of the protrusions 8 extending in the same direction as the longitudinal direction L of the mattress 1, and the lateral direction of the protrusions 8 extending in the same direction as the lateral direction S of the mattress 1. In this way, by making the length in the longitudinal direction L of the protrusions 8 longer than the length in the lateral direction S of the protrusions 8, the protrusions 8 move easily (are easy to tilt) in the lateral direction S, but are less likely to move (are less likely to tilt) in the longitudinal direction L, which contributes to the ease of turning over in bed.

[0033] Furthermore, as described above, the second depth X2 of the second groove portion 6 is deeper than the first depth X1 of the first groove portion 4. In other words, the longitudinal groove surrounding the protrusion 8 (the second groove portion 6 in this embodiment) is deeper than the lateral groove (the first groove portion 4 in this embodiment). This allows the protrusion 8 to easily tilt and collapse in the lateral direction S, contributing to the ability to turn over in bed.

[0034] Furthermore, due to the cutouts 8c and the rounded shape of the protrusions 8, the contact areas of the support surface 2 with the user's body are generally rectangular in shape, elongated in the longitudinal direction of the protrusions 8. Furthermore, the horizontal area of ​​the protrusions 8 on the support surface 2 side of the mattress 1 is smaller than that of the base (bottom 6a side), and the horizontal cross-sectional area of ​​the base (bottom 6a side) of the protrusions 8 is larger than that of the support surface 2. For this reason, the more load is applied to the support surface 2, the greater the stress caused by the deflection of the protrusions 8. As a result, as shown in Figure 7, the structure is such that the more load is applied, the greater the stress, and so the stress (load) deflection curve changes more linearly.

[0035] As shown in FIG. 6 , the protrusion 8 may include a tapered portion 11. The tapered portion 11 is a portion in the second cross section 8e where a length D6 along the lateral direction S is smaller than the second distance D2 between two adjacent second groove portions 6. The length D6 is a length in which the length in the lateral direction S of the protrusion 8 corresponding to a certain groove depth position is shorter than the length in the lateral direction S of the protrusion 8 corresponding to a groove depth position in the support surface 2 direction (which is the same as the thickness T direction in this embodiment). The length D6 is preferably a length at which the length in the lateral direction S of the protrusion 8 is minimum. In other words, the length D6 of the tapered portion 11 is preferably a length shorter than the length in the lateral direction of the second cross section 8e at a position where the groove depth is shallower than that of the tapered portion 11, and is the length of the protrusion 8 at a position where the groove width in the lateral direction S is maximum. The tapered portion 11 may be provided between the support surface 2 and the bottom 6a (an example of a second position) that is a second depth X2 away from the support surface 2. This allows the protrusion 8 to move more easily in the short-side direction.

[0036] FIG. 7 is a graph showing the stress generated by the mattress on the vertical axis and the deflection of the mattress 1 on the horizontal axis. The curve showing the deflection of the mattress 1 of this embodiment is shown by a solid line, and the curve showing the deflection of a conventional mattress is shown by a dashed line. As shown in FIG. 7, in the mattress 1 having the convex portions 8 configured in this manner, when a load is applied to the convex portions 8 and the mattress 1 is deflected, the stress rises linearly with respect to the deflection. In this way, by making the characteristic that stress is generated linearly with respect to the deflection of the convex portions 8, it is possible to ensure a constant sinking of the mattress regardless of the weight of the user.

[0037] Furthermore, the change in load when the user turns over in bed is mainly due to the displacement of the body weight in the short direction S, and the change in the longitudinal direction L is a change that accompanies the change in the short direction S. Also, when changing the position of a caregiver (to prevent bedsores in bedridden people, etc.), the position of the body is changed in the short direction S, and the change in the longitudinal direction L is a change that accompanies this change.

[0038] Furthermore, when turning over or changing positions, the user's (human) body shape is not round and rollable. Therefore, the mattress 1 must be able to flex and sink to a certain extent (ensuring stroke) to fit the shape of the human body, and must also return to its original shape through rebound. According to the mattress 1 of the present disclosure, when the user's body position changes as they turn over, and the position on the support surface 2 receiving the load changes, the mattress 1 flexes more in the short direction S than in the long direction L. Therefore, the support surface 2 is more likely to sink when the user turns over. Furthermore, if the mattress 1 generates linear stress when the user's body moves and the load on the support surface 2 is released, the protrusions 8 recover quickly (good recovery), providing a strong lifting effect that pushes up the user's body. This makes it easier to turn over.

[0039] As described above, the present disclosure can provide a novel mattress 1 that makes it easy to turn over in sleep. Furthermore, although the embodiments of the present disclosure have been described, the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the invention.

[0040] For example, in the above embodiment, notches 8c are provided at the upper part of the first groove 4, in the support surface 2 direction, which has a constant groove width (first groove width W1 in the above embodiment) adjacent to both ends of the top surface 8a in the longitudinal direction L. However, the present disclosure is not limited to this and may be configured as follows. For example, as shown in FIG. 8, when the mattress 1 is viewed in cross section II in the longitudinal direction L, the first cross section 8b of the convex portion 8 along the longitudinal direction L may be approximately trapezoidal. Therefore, the grooves at both ends of the top surface 8a in the longitudinal direction L do not need to have a constant groove width. In the case of a mattress 1 having such a shape of the convex portion 8, the groove width of the first groove 4 may be made to decrease toward the bottom 4a. That is, the shape of the first groove 4 may be formed as an inverted triangle with the base on the support surface side. In this case, the top surface 8a may be the upper base portion of the trapezoidal first cross section 8b. Furthermore, the length D5 in the longitudinal direction L may be the straight line length of the upper base portion of the trapezoidal first cross section 8b. In addition, the thickness T, length D5 along the longitudinal direction L, second spacing D2, and first depth X1 of the mattress 1 may be the same as those of the mattress 1 in Fig. 3. The convex portion 8 may include a narrowed portion 11. Furthermore, such a mattress 1 may include a back surface 10, a recessed portion 12, and a back surface convex portion 14, similar to the mattress 1 in Fig. 1. [Explanation of symbols]

[0041] 1: Mattress 2: Support surface 4: First groove 6: Second groove 8: Convex portion 11: Diaphragm

Claims

1. a support surface that contacts the user's body; a plurality of first grooves extending along a short direction of the support surface and having a first depth from the support surface; a plurality of second grooves extending along the longitudinal direction of the support surface and having a second depth from the support surface that is greater than the first depth; a plurality of protrusions separated by two adjacent first grooves and two adjacent second grooves; The back and Equipped with The protrusion has a top surface, At least a portion of the top surface includes the support surface, the rear surface includes a plurality of recesses and rear surface protrusions, The center of the recess is provided at a position overlapping with the bottom of the first groove in the thickness direction. mattress.

2. A support surface that contacts the user's body; a plurality of first grooves extending along a short direction of the support surface and having a first depth from the support surface; a plurality of second grooves extending along the longitudinal direction of the support surface and having a second depth from the support surface that is greater than the first depth; a plurality of protrusions separated by two adjacent first grooves and two adjacent second grooves; Equipped with The protrusion has a top surface, At least a portion of the top surface includes the support surface, The first grooves are formed at equal intervals across the entire longitudinal range of the mattress, with a first interval between each of the first and second longitudinal ends. mattress.

3. A support surface that contacts the user's body; a plurality of first grooves extending along a short direction of the support surface and having a first depth from the support surface; a plurality of second grooves extending along the longitudinal direction of the support surface and having a second depth from the support surface that is greater than the first depth; a plurality of protrusions separated by two adjacent first grooves and two adjacent second grooves; A polyurethane foam mattress comprising: The polyurethane foam forming the mattress has a hardness of 150 to 250 N and a density of 25 to 60 kg / m 3 ; a groove width of the first groove portion is 5.0 mm or more, a groove width of the second groove portion is 10.0 mm or more, and the groove width of the second groove portion is wider than the groove width of the first groove portion; The protrusion has a top surface, At least a portion of the top surface includes the support surface, a first cross section that is a cross section along the longitudinal direction of the protrusion includes a notch at an edge portion in the longitudinal direction; a length of the protrusion along the longitudinal direction on the support surface is smaller than a distance between two adjacent first groove portions at a first position where a distance from the support surface corresponds to the first depth, a second cross section that is a cross section along the short-side direction of the protrusion includes a narrowed portion whose length along the short-side direction is shorter than a distance between two adjacent second groove portions, and a second position whose distance from the support surface is the second depth, The throttle portion is provided between the support surface and the second position. mattress.

4. The length of the longitudinal direction of the protrusion is longer than the length of the lateral direction, A mattress according to any one of claims 1 to 3.

5. At least a portion of the top surface extends along the support surface in the longitudinal direction. A mattress according to any one of claims 1 to 3.

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