Mattress

Abstract

To provide a new mattress that has improved body pressure dispersibility.SOLUTION: A mattress of the present invention includes: a support surface 2a that comes in contact with the body of a user; a plurality of first groove parts 4 extending along a longitudinal direction of the support surface; a plurality of second groove parts 6 extending along a short side direction of the support surface; and a plurality of blocks 10 divided by adjacent two first groove parts and adjacent two second groove parts. A cross section in the longitudinal direction of the block and a cross section in the short side direction of the block are of different shapes. The width of the cross section in the longitudinal direction of the block includes a reverse tapered part that becomes larger from the bottom part of the block to the support surface, and the width of the cross section in the short side direction of the block includes a forward tapered part that becomes smaller from the bottom part of the block to the support surface.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 in Patent Document 1 has grooves in the longitudinal and lateral directions of the mattress. The mattress in Patent Document 1 is divided into multiple zones, with the longitudinal grooves spaced differently in each zone. This makes the mattress easier to bend. However, Patent Document 1 does not disclose a mattress that can distribute the user's body pressure regardless of the user's height or the position of the head, etc.

[0005] An object of the present disclosure is to provide a novel mattress with improved body pressure distribution. [Means for solving the problem]

[0006] A mattress according to one embodiment of the present disclosure comprises a support surface that contacts a user's body, a plurality of first grooves extending along the longitudinal direction of the support surface, a plurality of second grooves extending along the lateral direction of the support surface, and a plurality of blocks separated by two adjacent first grooves and two adjacent second grooves, wherein the longitudinal cross-section of the block and the lateral cross-section of the block have different shapes, and the width of the longitudinal cross-section of the block includes an inverse tapered portion that increases from the bottom of the block toward the support surface, and the width of the lateral cross-section of the block includes a forward tapered portion that decreases from the bottom of the block toward the support surface.

[0007] With this mattress, the user's body is supported by blocks with different cross-sectional shapes. The user's body pressure transmitted to the mattress is dispersed as each block is pressed and deformed. The blocks include a cross section with a forward tapered portion in the short direction and a cross section with a reverse tapered portion in the long direction. This makes the blocks more susceptible to deformation in the long direction than in the short direction. This improves body pressure dispersion in the long direction. As a result, the mattress can distribute the user's body pressure regardless of the user's height or the position of the head, etc. [Effects of the Invention]

[0008] According to the present disclosure, a novel mattress with improved body pressure distribution can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a plan view of a mattress according to an embodiment of the present disclosure. [Figure 2] Schematic diagram showing mattress zoning. [Figure 3] FIG. 2 is a cross-sectional view showing the AA section of FIG. [Figure 4] Enlarged view of part C in Figure 3. [Figure 5] FIG. 2 is a cross-sectional view showing the cross section BB of FIG. [Figure 6] Enlarged view of part D in Figure 5. [Figure 7] A graph comparing the stress-deflection curves of a conventional mattress and an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0011] As shown in Figure 1, the mattress 1 of this embodiment extends in a longitudinal direction L and a lateral direction W, and is generally rectangular in plan view. The length of the mattress 1 in the longitudinal direction L is, for example, 1800 mm or more and 2000 mm or less. The length of the mattress 1 in the lateral direction W is, for example, 900 mm or more and 1500 mm or less. Furthermore, the thickness of the mattress 1 (see arrow H in Figure 2) is, for example, 60 mm or more and 200 mm or less.

[0012] The mattress 1 is made of an elastically deformable soft foam. The mattress 1 of this embodiment has a density of 15 kg / m 3 More than 100kg / m 3 The following is made of polyurethane foam with a hardness of 50N to 400N and a resilience of 40% or more.

[0013] The density of the polyurethane foam forming the mattress 1 is 25 kg / m 3 More than 60kg / m 3 The density of the polyurethane foam is preferably 15 kg / m or less. 3 In the above cases, the mattress tends to be sufficiently hard and durable. 3 In the following cases, the overall weight of the mattress 1 is relatively small and easy to handle.

[0014] In addition, the hardness of the polyurethane foam forming the mattress 1 is preferably greater than 80N from the viewpoint of the workability of the mattress 1 and ensuring a sinking feeling (stroking feeling) when the user M (see Figure 2) lies down on it.

[0015] Furthermore, the resilience of the polyurethane foam forming the mattress 1 can be selected appropriately. For example, the resilience of the polyurethane foam may be 25% or more, and more preferably 40% or more. This improves the recovery of the mattress 1 (ease of returning to its original shape) and improves the ease of turning over (ease of turning over).

[0016] FIG. 2 is a schematic diagram showing a state in which a user M lies on the support surface 2a of the mattress 1. As shown in FIG.

[0017] The mattress 1 has a support surface 2a that comes into contact with the body of a user M, and a back surface 2b opposite to the support surface 2a. A user M of the mattress 1 lies on the support surface 2a in the longitudinal direction L and turns over in their sleep in the lateral direction W.

[0018] The mattress 1 comprises at least one first region S1 arranged along the longitudinal direction L and at least one second region S2 having properties different from those of the first region S1. In this embodiment, the mattress 1 comprises four second regions S2 and three first regions S1 (S1a, S1b, S1c).

[0019] The first region S1 is disposed at a position where it is expected to receive a load from the user M. For example, the first region S1a is expected to contact the head Ma and shoulders Mb of the user M. The first region S1b is expected to contact the waist Mc of the user M. The first region S1c is expected to contact the calves Md of the user M. Note that the first region S1a may be provided separately depending on the positions of the head Ma and shoulders Mb of the user M.

[0020] The first region S1 is preferably positioned so as to contact the head, shoulders, and waist of the user regardless of the user's height. In Fig. 2, a tall user M is indicated by a dashed-dotted line, and a short user Ms is indicated by a dashed-dotted line. As shown in the figure, the first region S1 (S1a, S1b) of the mattress 1 is positioned so as to contact the head Ma (Msa), shoulders Mb (Msb), and waist Mc (Msc) of the user M (Ms), regardless of the user M (Ms)'s height.

[0021] In addition, in the longitudinal direction L, the position where the head Ma (Msa) of the user M (Ms) contacts the mattress 1 is generally consistent regardless of the height or body type of the user M (Ms). On the other hand, the positions where the waist Mc (Msc) and calves Md (Msd) contact the mattress 1 tend to vary greatly depending on the height or body type of the user M (Ms). For this reason, the first regions S1b and S1c, with which the waist Mc (Msc) and calves Md (Msd) are expected to contact, may be set to be larger in the longitudinal direction L than the first region S1a, with which the head Ma (Msa) and shoulders Mb (Msb) are expected to contact.

[0022] The second regions S2 are provided at positions different from the first regions S1. The size, position and number of the second regions S2 are changed according to the size and position in the longitudinal direction L of the first regions S1.

[0023] FIG. 3 is a cross-sectional view of the mattress 1 in the short-side direction W, and FIG. 4 is an enlarged cross-sectional view showing a portion C in FIG.

[0024] As shown in Figures 1 and 3, the mattress 1 further includes a plurality of first groove portions 4 extending along the longitudinal direction L, a plurality of second groove portions 6 intersecting the first groove portions 4 and extending along the short direction W, a plurality of blocks 10 partitioned by the first groove portions 4 and the second groove portions 6, and a plurality of recesses 14.

[0025] The first grooves 4 extend along the longitudinal direction L of the support surface 2a from the first end 1a to the second end 1b in the longitudinal direction L of the mattress 1 (see FIG. 1 for both). As shown in FIG. 4, the first depth d1, which is the depth of the first grooves 4 from the support surface 2a, is, for example, 30 mm or more and 60 mm or less. Note that the first depth d1 is not limited to this and can be changed appropriately depending on the thickness of the mattress 1. For example, it is desirable to set the first depth d1 to 30% or more and 65% or less of the thickness of the mattress before processing (the mattress before the first depth d1 is formed). In this embodiment, multiple first grooves 4 are provided at predetermined intervals in the lateral direction W of the mattress 1, and the first depth d1 of each first groove 4 is constant. Note that the number of first grooves 4 can be changed appropriately depending on the size of the mattress 1 and the required performance.

[0026] FIG. 5 is a cross-sectional view of the mattress 1 in the longitudinal direction L, and FIG. 6 is an enlarged cross-sectional view showing a portion D in FIG.

[0027] 1 and 5, the second groove portion 6 extends along the short direction W of the support surface 2a from the third end 1c to the fourth end 1d in the longitudinal direction L of the mattress 1 (see FIG. 1 for both). As shown in FIG. 6, the second depth d2, which is the depth of the second groove portion 6 from the support surface 2a, is, for example, not less than 40 mm and not more than 70 mm.

[0028] The second depth d2 is not limited to this and can be changed appropriately depending on the thickness of the mattress 1. For example, it is desirable to set the second depth d2 to be 15% or more and 75% or less of the thickness of the mattress before processing (the mattress before the second depth d2 is formed). Furthermore, it is more desirable to set the second depth d2 to be 30% or more and 75% or less of the thickness of the mattress before processing (the mattress before the second depth d2 is formed).

[0029] Furthermore, the second depth d2 of the second groove portions 6 may be changed depending on the location in the longitudinal direction L. As a result, some of the second depths d2 may be formed to be larger than the first depth d1. For example, the second depth d2 may be set to be largest at the center of the mattress 1 in the longitudinal direction L in each region of the first region S1. For example, in FIG. 5, the first region S1a has eight second groove portions 6 arranged at intervals in the longitudinal direction L. The second groove portions 6 located at the center of the first region S1a in the longitudinal direction L have a larger second depth d2 than the second groove portions 6 located at the ends of the first region S1a in the longitudinal direction L. Furthermore, the second depths d2 of the second groove portions 6 in the first regions S1a and S1c may be set to be larger than the second depth d2 in the first region S1b.

[0030] The number of second groove portions 6 can be changed as appropriate depending on the size of the mattress 1 and the required performance.

[0031] The block 10 is divided into two adjacent first groove portions 4 and two adjacent second groove portions 6. As shown in Fig. 6, the block 10 has a first length h1 along the longitudinal direction L. As shown in Fig. 4, the block 10 has a second length h2 along the lateral direction W.

[0032] The first length h1 may be smaller than the second depth d2 of the second groove portion 6. In this embodiment, the first length h1 is smaller than the second depth d2 of the second groove portion 6 located near the center of the first regions S1a to S1c in the longitudinal direction L. On the other hand, the first length h1 is larger than the second depth d2 of the second groove portion 6 located near the end of the first regions S1a to S1c in the longitudinal direction L.

[0033] The block 10 is disposed in the first region S1 of the mattress 1. That is, the block 10 supports any one of the head Ma, shoulders Mb, and waist Mc of the user M when the user M is in contact with the support surface 2 of the mattress 1 (see FIG. 2 for all of these).

[0034] As shown in FIG. 6, the block 10 includes a bottom 10a that is continuous with the first groove 4 and the second groove 6, and a top 10b that includes the support surface 2a. The block 10 has a first cross section 11 (FIG. 4) that is a cross section in the short direction W, and a second cross section 12 (FIG. 6) that is a cross section in the long direction L. The first cross section 11 and the second cross section 12 have mutually different shapes. In this embodiment, the height of the top b (in the direction of arrow H in FIG. 6) is set to be 5% to 10% of the thickness of the mattress 1.

[0035] As shown in FIG. 4, the first cross section 11 has a width w1 and includes a forward tapered portion 11a.

[0036] The width w1 is the size of the first cross section 11 along the short direction W. The width w1 of the first cross section 11 becomes smaller in the forward tapered portion 11a from the bottom 10a of the block 10 toward the support surface 2a. That is, the width w1 is smallest near the support surface 2a.

[0037] As shown in FIG. 6, the second cross section 12 has a width w2 and includes an inverted tapered portion 12a located between the bottom 10a and the top 10b of the block 10, and a convex portion 12b located on the inverted tapered portion 12a.

[0038] The width w2 is the size of the second cross section 12 along the longitudinal direction L. The width w2 of the second cross section 12 increases in the reverse tapered portion 12a from the bottom 10a of the block 10 toward the support surface 2a. The width w2 decreases in the convex portion 12b from the reverse tapered portion 12a toward the support surface 2a. That is, the width w2 is smallest at the bottom of the reverse tapered portion 12a and largest between the reverse tapered portion 12a and the convex portion 12b.

[0039] The maximum length of the width w2 is equal to the first length h1, which is the length in the longitudinal direction L of the block 10. The first length h1 is preferably smaller than the second depth d2 of the second groove portion 6. In this embodiment, the first length h1 is, for example, 40 mm or more and 60 mm or less. This makes it easier for the entire block 10 to fall toward the adjacent second groove portion 6. This allows the block 10 to distribute the body pressure received from the body of the user M. Note that the first length h1 is not limited to this and can be changed as appropriate depending on the thickness of the mattress 1.

[0040] One or more protrusions 12b may be provided for one block 10. In this embodiment, the protrusions 12b include a first protrusion 121 and a second protrusion 122.

[0041] The protrusion 12b has a vertex C. The vertex C is the point at which the height of the protrusion 12b from the bottom 10a of the block 10 (in the direction of arrow H in FIG. 6) is greatest. The vertex C of the protrusion 12b is spaced apart from the center C0 of the block 10 in the longitudinal direction L.

[0042] In this embodiment, the first convex portion 121 has a vertex C1, and the second convex portion 122 has a vertex C2. The vertex C1 of the first convex portion 121 and the vertex C2 of the second convex portion 122 are each spaced apart from the center C0 of the block 10 in the longitudinal direction L.

[0043] For example, when the body of the user M comes into contact with the first convex portion 121 including the support surface 2a, the point of application of the load from the user M on the block 10 is near the apex C1 of the first convex portion 121. Because the center C0 of the block 10 and the apex C1 of the first convex portion 121 are spaced apart, a moment is generated on the entire block 10, pushing it down toward the first convex portion 121. As a result, the block 10 deforms in the longitudinal direction L, tilting toward the first convex portion 121 with the bottom portion 10a of the block 10 as a fulcrum. On the other hand, when the body of the user M comes into contact with the second convex portion 122 including the support surface 2a, the block 10 deforms in the longitudinal direction L, tilting toward the second convex portion 122 with the bottom portion 10a of the block 10 as a fulcrum. As a result, the block 10 can distribute the body pressure received from the body of the user M.

[0044] Top surface 12c of protrusion 12b may be a curved surface that convexes upward (in the direction of arrow H in FIG. 6), or may be a flat surface that is horizontal in the longitudinal direction L (see FIG. 1) and the lateral direction W. In this embodiment, top surface 12c is a flat surface that includes apex C. This allows protrusion 12b to come into surface contact with the body of user M and to be supported by the entire top surface 12c. Furthermore, by increasing the contact area between user M and block 10, the entire block 10 can be more easily toppled along the longitudinal direction L.

[0045] On the other hand, if the contact area between the user M and the block 10 is increased too much, the block 10 may deform excessively, resulting in an insufficient repulsive force being transmitted from the mattress 1 to the user M, which may give the user M the impression that the mattress 1 lacks rigidity. To address this, the end of the top surface 12c in the longitudinal direction L may be rounded to adjust the contact area between the user M and the block 10. This allows for a characteristic in which stress is generated linearly in response to the deflection of the block 10 when the block 10 supports the body of the user M. In other words, the mattress 1 can ensure a constant sinking when the user M comes into contact with the support surface 2a.

[0046] The recess 14 has a generally trapezoidal shape and is provided on the back surface 2b of the mattress 1. The recess 14 extends from the first end 1a to the second end 1b in the short-side direction W of the mattress 1, forming an uneven surface on the back surface 2b. The recess 14 is preferably provided in the short-side direction W at a position that overlaps with the block 10 in the height direction (the direction of arrow H in FIG. 3).

[0047] When the back surface 2b of the mattress 1 is placed on a bed frame or the like, the back surface 2b comes into contact with the bed frame or the like at all points except the recessed portion 14. Therefore, when the body of the user M comes into contact with the support surface 2a of the mattress 1, the mattress 1 generates a reaction force at the point of contact of the back surface 2b with the bed frame or the like. As a result, stress is generated in multiple stages in the mattress 1 at positions away from the block body in the short direction W.

[0048] Furthermore, recess 14 can form a space between mattress 1 and a bed frame or the like on which mattress 1 is placed, thereby improving breathability from support surface 2a to back surface 2b of mattress 1.

[0049] Next, the characteristics of the mattress 1 of this embodiment and a flat mattress without grooves on the surface (hereinafter referred to as the conventional mattress) will be explained using Figure 7. Figure 7 is a graph with the deflection (%) of the mattress on the horizontal axis and the stress (N) on the vertical axis. The dashed-dotted line in Figure 7 shows the stress-strain curve of the conventional mattress, and the solid line shows the stress-strain curve of the mattress 1 of this embodiment.

[0050] As shown in Figure 7, at initial deflection N1, where the deflection is less than 10%, the conventional mattress has an inflection point where the slope of the stress-strain curve changes significantly. In particular, at deflection of less than 5% where the inflection point is reached, the stress becomes larger compared to the deflection. This can cause users of conventional mattresses to feel that the mattress is hard.

[0051] On the other hand, the mattress 1 of this embodiment has a smaller slope and a gentler stress-strain curve at the initial deflection amount N1 than conventional mattresses. In other words, the mattress 1 can achieve better body pressure distribution than conventional mattresses.

[0052] Furthermore, in the intermediate stage N2, where the amount of deflection is between 10% and 50%, the slope of the conventional mattress changes sharply from the initial deflection N1. In contrast, the mattress 1 of this embodiment changes gradually from the initial deflection N1, and the slope of the stress-strain curve increases at a constant angle. In other words, the mattress 1 of this embodiment can ensure constant deflection characteristics regardless of the weight of the user M.

[0053] Furthermore, in section N3 where the amount of deflection is 50% or more, the mattress 1 of this embodiment experiences a higher stress than conventional mattresses. That is, in section N3 of high compression where the amount of deflection is large, the mattress 1 can prevent the user from feeling like they are hitting the bottom and improve support.

[0054] Furthermore, with the mattress 1 of this embodiment, as the amount of deflection increases, the slope of the stress-deflection curve increases, and the stress-deflection curve exhibits a more quadratic slope. In other words, the mattress 1 can exhibit a natural stress-deflection curve regardless of an increase in the weight of the user M.

[0055] The CI value (Comfort Index) of the mattress 1 of this embodiment is higher than that of conventional products. The CI value is the value obtained by dividing the stress at 65% deflection by the stress at 25% deflection, and is used as an index of the supportability of the mattress. Generally, the higher the CI value, the better the supportability of the mattress is evaluated.

[0056] As described above, the mattress 1 of this embodiment can provide a mattress that is superior in body pressure distribution and support compared to conventional mattresses.

[0057] The mattress 1 of the present disclosure comprises a support surface 2a that comes into contact with the body of a user M, a plurality of first groove portions 4 extending along the longitudinal direction L of the support surface 2a, a plurality of second groove portions 6 extending along the lateral direction W of the support surface 2a, and a plurality of blocks 10 separated by two adjacent first groove portions 4 and two adjacent second groove portions 6. A first cross section 11 of each block 10 in the lateral direction W and a second cross section 12 in the longitudinal direction L have different shapes, with the first cross section 11 including a forward tapered portion 11a and the second cross section 12 including a reverse tapered portion 12a.

[0058] The body of the user M is supported by the block 10, which has a first cross section 11 including a forward tapered portion 11a and a second cross section 12 including a reverse tapered portion 12a. This allows the second cross section 12 to increase the surface area that supports the body of the user M. Furthermore, the block 10 is more easily deformed in the longitudinal direction L than in the short direction W. This improves the body pressure distribution of the mattress 1 in the longitudinal direction L.

[0059] Furthermore, the second cross section 12 of the block 10 includes a convex portion 12b. In the convex portion 12b, the width w2 of the second cross section 12 decreases toward the support surface 2a.

[0060] This allows the protrusions 12b to adjust the contact area with the body of the user M and generate linear stress in response to the deflection of the entire block 10. As a result, it is possible to ensure a constant sinking of the user M when he or she comes into contact with the support surface 2a.

[0061] Furthermore, the apex C of the convex portion 12b of the second cross section 12 is spaced apart from the center C0 of the block 10 when viewed in the longitudinal direction L.

[0062] This allows the vertex C, which is the point of application of the load from the user M on the block 10, to be spaced apart from the center C0 of the block 10. As a result, a moment is generated in the block 10, with the center C0 as the center of rotation, pushing the entire block 10 down in the longitudinal direction L. This causes the block 10 to deform in the longitudinal direction L, allowing the body pressure received from the body of the user M to be dispersed.

[0063] Furthermore, the first depth d1 of the first groove portion 4 may be smaller than the second depth d2 of the second groove portion 6.

[0064] Furthermore, the first length h1 of the block 10 may be formed to be smaller than the second depth d2 of the second groove portion 6.

[0065] This allows the blocks 10 to collapse more easily in the longitudinal direction L than in the lateral direction W, and thus to deform more easily. As a result, the body pressure distribution in the longitudinal direction L of the mattress 1 is improved.

[0066] Furthermore, the mattress 1 has a first region S1 intended to come into contact with the head Ma, shoulders Mb, and waist Mc of the user M, and a second region S2 different from the first region S1. The block 10 is disposed in the first region S1.

[0067] As a result, the mattress 1 can support the head Ma, shoulders Mb, and waist Mc of the user M with the blocks 10 regardless of the height of the user M. Therefore, the mattress 1 can distribute the body pressure of the user M regardless of the height of the user M and thus the position of the head Ma, etc.

[0068] As described above, according to the present disclosure, a novel mattress with improved body pressure distribution can be provided.

[0069] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

[0070] In the above embodiment, the second cross section 12 includes the reverse tapered portion 12a and the convex portion 12b located on the reverse tapered portion 12a. However, this is not limiting, and the convex portion 12b may be omitted. The second cross section 12 may include only the reverse tapered portion 12a where the width 2 increases from the bottom 10a to the support surface 2a.

[0071] Furthermore, in the above embodiment, the mattress 1 has a so-called single-layer material structure formed from a single material, but the present disclosure is not limited to this, i.e., the mattress 1 may have a layered structure in which different materials are layered. [Explanation of symbols]

[0072] 1: Mattress 2a: Support surface 4: First groove 6: Second groove 10: Block d1: First depth d2: Second depth h1: First length 11: First cross section (cross section) 11a: Forward tapered portion w1: Width 12: Second cross section (cross section) 12a: Reverse tapered portion w2: Width S1: 1st area S2: 2nd area

Claims

1. a support surface that contacts the user's body; a plurality of first grooves extending along the longitudinal direction of the support surface; A plurality of second grooves extending along a short direction of the support surface; a plurality of blocks separated by two adjacent first groove portions and two adjacent second groove portions; Equipped with a cross section of the block in the longitudinal direction and a cross section of the block in the lateral direction have different shapes; a width of the longitudinal cross section of the block including a reverse tapered portion that increases from the bottom of the block toward the support surface; A mattress, wherein the width of the cross section of the block in the short side direction includes a forward tapered portion that decreases from the bottom of the block toward the support surface.

2. the width of the cross section of the block in the longitudinal direction includes a convex portion located on the reverse tapered portion and decreasing from the reverse tapered portion toward the support surface; The mattress of claim 1.

3. the apex of the protrusion is spaced from the center of the block in the longitudinal direction; The mattress of claim 2.

4. a first region intended to contact the user's head, shoulders, and waist; a second region different from the first region; Equipped with The block is disposed in the first region. The mattress of claim 1.

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