Folding mattress and mattress cover

Abstract

To provide a mattress for improving sleeping comfort by reducing a gap formed between cushions.SOLUTION: A folding mattress includes a first part 1 and a second part 2 connected to the first part 1 at an axial side R and foldable relative to the first part 1. The first part 1 includes a first cushion 11 and a first cover 12 for covering the first cushion 11, and the second part 2 includes a second cushion 21 and a second cover 22 for covering the second cushion 21. The first cover 12 includes a first use portion 121 on which a user lies in a use state, and a first facing portion 122 that is adjacent to the axial side R and faces the second cover 22 in the use state, where the stretchability of the first facing portion 122 is lower than the stretchability of the first use portion 121.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foldable mattress and a mattress cover for use therewith. [Background technology]

[0002] A mattress is bedding that is laid on the floor when sleeping. Some mattresses can be folded for storage or transportation, and tri-fold mattresses are particularly widely used. However, tri-fold mattresses have gaps formed when folded, which creates an uneven surface on the user's side, making them uncomfortable to sleep on. To solve this problem, mattresses such as those described in Patent Document 1 are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jikko No. 57-137360 Summary of the Invention [Problem to be solved by the invention]

[0004] In the mattress described in Patent Document 1, soft cushion bodies 24 are provided to fill the gaps (recesses) between the mattress layers, preventing the surface from feeling uncomfortable. However, because the soft cushion material is softer than the surrounding materials, it can deform and cause unevenness on the mattress surface, leaving room for improvement in sleeping comfort.

[0005] In view of the above problems, the present invention aims to provide a mattress that reduces gaps formed at folds and improves sleeping comfort. [Means for solving the problem]

[0006] The present invention solves the above-mentioned problems and provides a foldable mattress that can transition between a usage state in which a user lies down and a folded storage state, comprising a first portion and a second portion connected to the first portion by an axial edge and foldable relative to the first portion, the first portion having a first cushion and a first cover covering the first cushion, the second portion having a second cushion and a second cover covering the second cushion, the first cover including a first use portion on which a user lies down in usage and a first opposing portion adjacent to the axial edge and opposing the second cover in usage, the first opposing portion having lower stretchability than the first use portion. Furthermore, the stretchability of the first opposing portion in a direction perpendicular to the axial edge is lower than the stretchability of the first use portion in a direction perpendicular to the axial edge. This reduces gaps formed at the folds, thereby providing a mattress and its cover that improve sleeping comfort.

[0007] In a preferred embodiment of the present invention, the second cover includes a second relative portion that faces the first relative portion in use and a second bottom surface portion that is adjacent to the second relative portion and comes into contact with the ground in use, and an end portion of the first relative portion is sandwiched between the second relative portion and the second bottom surface portion along the shaft side. This configuration makes it easier to make the gap between the first relative portion and the second relative portion narrower.

[0008] In a preferred embodiment of the present invention, the first cover has a low-elasticity portion having lower elasticity than the first use surface, and the low-elasticity portion includes a surrounding low-elasticity portion provided to surround a side surface of the first cushion, thereby making it difficult for the internal cushion to distort and making it easier to maintain a narrow gap.

[0009] In a preferred embodiment of the present invention, the surrounding low-elasticity portion is provided adjacent to the bottom surface of the first cover, and the low-elasticity portion includes a bottom low-elasticity portion provided over the entire bottom surface of the first cover, thereby maintaining low elasticity in areas other than the area where the user lies, and further suppressing deformation of the cushion.

[0010] In a preferred embodiment of the present invention, the first cover includes a first connecting portion connecting the first use portion and the first opposing portion, the first connecting portion having greater elasticity than the first opposing portion and opposing the second cover in an in-use state. The first connecting portion deforms when a force is applied in a direction widening the gap, thereby preventing the opposing portion and the axial side from widening and improving sleeping comfort.

[0011] In a preferred embodiment of the present invention, the sheet portion further includes a sheet portion covering at least the first use surface, and the sheet portion is provided with quilting parallel to the axial side, thereby making it even less noticeable that gaps are formed between the respective portions. [Effects of the Invention]

[0012] The present invention, which solves the above-mentioned problems, can provide a mattress that improves sleeping comfort by minimizing the gaps formed at the folds. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view of a mattress according to an embodiment of the present invention. [Figure 2] 1 is a longitudinal cross-sectional view of a mattress according to an embodiment of the present invention. [Figure 3] FIG. 1 is a bottom view of a mattress according to an embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view of a first portion according to an embodiment of the present invention. [Figure 5] FIG. 2 is an enlarged schematic view of a low-elasticity portion according to an embodiment of the present invention. [Figure 6] 1A-1C are three views of a mattress with a cover according to an embodiment of the present invention. [Figure 7] 1 is a schematic diagram illustrating a gap portion of a mattress according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, mattresses according to various embodiments of the present invention will be described with reference to the drawings. The description will be made in the order of the configuration of the embodiments and the method of implementation. The following embodiments are merely examples of the present invention, and the present invention is not limited to the following embodiments. Furthermore, the term "substantially" in the application documents is a concept that includes cases where the subsequent shape is chamfered or rounded, and where the elements that make up the shape are deformed or changed in length within a range that does not impede the purpose of the configuration. In this specification, the term "stretchability" refers to the ease with which a material stretches when the same force is applied, and the higher the stretchability, the easier the material is to stretch.

[0015] The present invention is a foldable mattress X that can be transitioned between a usage state in which a user lies down and a folded storage state. The mattress X is composed of a cushion and a cover that covers the cushion, and includes a first portion 1 and a second portion 2 that is connected to the first portion 1 at an axis R and is foldable relative to the first portion 1, the first portion 1 having a first cushion 11 and a first cover 12 that covers the first cushion 11, the second portion 2 having a second cushion 21 and a second cover 22 that covers the second cushion 21, the first cover 12 having a first usage portion 121 on which a user lies down in the usage state and a first opposing portion 122 that is adjacent to the axis R and faces the second cover 22 in the usage state, and the first opposing portion 122 has lower elasticity than the first usage portion 121.

[0016] <<Embodiment>> As shown in FIG. 1(a), the mattress X is divided into three parts: a first part 1, a second part 2, and a third part 3, each of which is roughly rectangular and has roughly the same shape and size. A portion of the end edge of each part serves as an axial side R that rotatably connects the two parts, and the axial side R includes a first axial side R1 that connects the first part 1 and the second part 2, and a second axial side R2 that connects the second part 2 and the third part 3. Furthermore, the first part 1, the second part 2, and the third part 3 are stacked in the stored state, as shown in FIG. 1(b). Alternatively, the mattress X may be folded in half without the third part 3, or an additional part of the same shape may be added.

[0017] The first section 1 includes a first cushion 11 and a first cover 12 that stores the first cushion 11 for easy insertion and removal. The first cushion 11 is a rectangular parallelepiped cushion material filled with a resin material such as urethane or fibers such as cotton or coconut. It may contain springs, and a highly resilient foamed urethane resin is particularly preferable. The first cushion 11 is preferably inscribed in the first cover 12 so as to fit tightly to the entire cushion. This arrangement makes the entire first section 1 less likely to deform and reduces the likelihood of gaps forming between the cushion and the second section 2. In this embodiment, the first cushion 11 is covered with a thin fabric (the shaded area in the figure) to reduce friction with the first cover 12 and facilitate easy insertion and removal. The first cushion 11 may be constructed by stacking multiple cushion materials, and its surface may have a corrugated or irregular shape.

[0018] Similarly, the second part 2 includes a second cushion 21 and a second cover 22, and the third part 3 includes a third cushion 31 and a third cover 32. Their functions are similar to those of the first cushion 11 and the first cover 12, so a description thereof will be omitted, but the materials and shapes may be different.

[0019] Furthermore, the first cushion 11, second cushion 21, and third cushion 31 are each made of a material that is provided independently and has approximately the same shape, and by replacing one cushion with a different cover and storing it, the load can be distributed and durability can be improved. In this case, the effect can be further enhanced by turning the cushions over. Meanwhile, the first cover 12 and the second cover 22 are joined via a first axial side R1, and the second cover 22 and the third cover 32 are joined via a second axial side R2.

[0020] The first cover 12 is formed by combining multiple planar fabric materials so as to tightly cover the substantially rectangular parallelepiped first cushion 11 in a stored state. That is, in a used state, the first cover 12 has a first usable portion 121 on which a user lies facing up, a first opposing portion 122 adjacent to the first axial side R1 and opposing the second portion 2, a first side portion 123 provided adjacent to the first usable portion 121, a first bottom portion 124 that abuts against the ground and adjacent to the first axial side R1 in use, and a first connecting portion 125 arranged between the first usable portion 121 and the first opposing portion 122, with both ends connected to the first side portion 123.

[0021] The second cover 22 is formed by combining a plurality of planar fabric materials so as to closely cover the substantially rectangular parallelepiped second cushion 21 in a stored state. That is, in a used state, the second cover 22 has a top surface on which a user lies, and includes a second usable portion 221 adjacent to the second axial side R2, a second opposing portion 222 adjacent to the first axial side R1 and opposing the first portion 1, a second side portion 223 provided adjacent to the second usable portion 221, a second bottom portion 224 that comes into contact with the ground in use and adjacent to the first axial side R1, a second connecting portion 225 disposed between the second usable portion 221 and the second opposing portion 222 and having both ends connected to the second side portion 223, and a second sub-opposing portion 226 adjacent to the second axial side R2 and opposing the third portion 3.

[0022] The third cover 32 is formed of a plurality of planar portions so as to closely cover the third cushion 31 when the third cushion 31 is stored. That is, in a usable state, the third cover 32 has a top surface on which a user lies, and includes a third usable portion 321 adjacent to the second axial side R2, a third opposing portion 322 adjacent to the second axial side R2 and opposing the second portion 2, a third side portion 323 which is a portion other than the third opposing portion 322 adjacent to the third usable portion 321, and a third bottom portion 324 which comes into contact with the ground.

[0023] The connection of the mattress cover will be described in detail below using FIG. 2, a longitudinal cross-sectional view of mattress X. The first usable portion 121 and the first side portion 123, the second usable portion 221 and the second side portion 223, the third usable portion 321 and the third side portion 323, and the third opposing portion 322 and the third bottom portion 324 are joined by folding the respective materials at their edges and sewing the folded portions together. As shown in FIG. 3(b), the surfaces of the side portions in each portion are also sewn together in a similar manner. This prevents the stitching from appearing on the surface, improving durability and preventing deformation. The side portions may be a single strip of material, with portions of the surface covering the corners of the mattress and both ends sewn to the opposing portions, which further tightens the internal cushion and prevents deformation.

[0024] The first cover 12 and the second cover 22 are connected at the first axial side R1 as follows. The first axial side R1 includes the bottom-side end edges of the first and second mating portions 122 and 222, and the first and second bottom side edges of the bottom portion 124 and 224. The second mating portion 222 and the second bottom side 224 are folded toward the second cushion 21, and the ends of the first mating portion 122 and the first bottom side 124 are sewn together in a state where they penetrate between the folded portions. In this manner, depending on the degree of penetration of the first mating portion 122 and the first bottom side 124 and the folding degree of the second mating portion 222 and the second bottom side 224, the first mating portion 122 and the second mating portion 222 can be sewn together easily and strongly in a state where the distance between them is shortened, thereby narrowing the gap formed between the two mating portions and improving the comfort of use. The relationship between the first mating portion 122 and the second mating portion 222, and the relationship between the first bottom surface portion 124 and the second bottom surface portion 224 may be reversed.

[0025] The second cover 22 and the third cover 32 are connected at the second axial side R2 as follows. The second axial side R2 includes the end edges of the second sub-mating portion 226 and the third mating portion 322 on the use portion side, and the end edges of the second use portion 221 and the third use portion 321. Here, the second use portion 221 and the second sub-mating portion 226 are folded toward the second cushion 21, and the ends of the third use portion 321 and the third mating portion 322 are sewn together in a state where they are inserted between the folded portions. This narrows the gap formed between the second sub-mating portion 226 and the third mating portion 322, facilitating manufacturing and improving the comfort of use.

[0026] The first connecting portion 125 is a strip-shaped material that is provided so as to face the second connecting portion 225 in the used state, and is provided with a width of approximately 1 cm to 5 cm from one end to the other end of the first side surface portion 123. The surface thereof is provided with the same material as the first usable portion 121. As shown in FIG. 2, both ends of the first connecting portion 125 are folded toward the first cushion 11 so as to form a U-shape in cross section. The end edges of the first usable portion 121 and the end edge of the first opposing portion 122 on the usable portion side are folded toward the first cushion 11, and are connected to the first connecting portion 125 at the respective folded surfaces. The second connecting portion 225 has substantially the same shape as the first connecting portion 125, is arranged to face the first connecting portion 125 in the use state, and is connected to the second use portion 221 and the second opposite portion 222 in the same manner as the first connecting portion 125. By providing the first connecting portion 125 and the second connecting portion 225 in this manner, even if the gap between the first part 1 and the second part 2 is crushed, the connecting portion is exposed, providing a pleasant feel and maintaining a comfortable sleeping experience.

[0027] The side portions (123, 223, 323) and bottom portions (124, 224, 324) of each portion are connected via a freely closable zipper B, indicated by a thick dashed line in FIG. 3(a). In this embodiment, the zipper B is arranged in a U-shape along the boundary between the side portions and the bottom portion, exposing the entire bottom side and facilitating removal. In particular, in the first portion 1 and the third portion 3, the zipper B is arranged along the outer edge of the mattress X, making it easy to remove the cushion. In addition, in the second portion 2, a portion of the zipper B is arranged along the boundary with the second minor opposing portion 226 and is spaced apart from the first axial side R1, making it difficult for the first axial side R1 itself to expand and contract, thereby making it difficult for the gap formed between the first portion 1 and the second portion 2 to widen.

[0028] 1 or 4, the shaded area is the low-elasticity section A. FIG. 4 is a perspective view of the mattress X, omitting portions other than the first portion 1. As shown in FIG. 4, the portion of the first portion 1 other than the first usable portion 121 and the first connecting portion 125 is the low-elasticity section A. In particular, the first opposing portion 122 and the first side portion 123 form a surrounding low-elasticity section A1 that surrounds the side surface of the first portion 1, and the first bottom surface portion 124 forms a bottom low-elasticity section A2 that is provided as a low-elasticity section in its entirety. The low-elasticity section A has lower elasticity than at least the first usable portion 121 and the first connecting portion 125, and preferably lower elasticity than the first cushion 11. In particular, its elasticity in the direction perpendicular to the axial side R is lower than that of the first usable portion 121 and the first connecting portion 125. The first use portion 121 and the first connecting portion 125 are made of a material such as jacquard fabric that has a certain degree of stretch and feels good against the skin, and may be antibacterial treated.

[0029] The surrounding low-elasticity portion A1 includes the entire first opposing portion 122 and the first side portion 123. The low-elasticity surface surrounds the side of the first portion 1, preventing the first cushion 11 from extending in the lateral direction (particularly the outer edge) when pressure is applied. This prevents the cushion from deforming in directions other than the gap, widening the gap, or distorting its shape, and also improves durability.

[0030] The bottom low-elasticity portion A2 includes the entire first bottom portion 124 and is connected to the surrounding low-elasticity portion A1 along the entire edge, which, together with the surrounding low-elasticity portion A1, further prevents the first cushion 11 from deforming inside the first cover 12.

[0031] In addition, it is preferable that the surrounding low-elasticity portion A1 and the bottom low-elasticity portion A2 are also provided in the second portion 2 and the third portion 3 in the same manner as the first portion 1, thereby suppressing deformation of the cushions throughout the mattress X and suppressing deformation of the gaps.

[0032] 5 shows an enlarged view of the low-elasticity section A. The low-elasticity section A includes a mesh section A31 that covers the entire surface of each low-elasticity section A and is provided to allow at least gas to pass through the inside and outside of the cover (12, 22, 32), and a plurality of restraining threads that prevent the mesh section A31 from stretching. The restraining threads are threads that are less elastic than at least the mesh section A31 and have a larger diameter. The restraining threads include long restraining threads A32 and short restraining threads A33 that are perpendicular to the long restraining threads A32 and shorter than the long restraining threads A32.

[0033] The mesh portion A31 is a mesh fabric with a three-dimensional structure, and the constituent thread materials are stacked in a honeycomb structure or lattice structure, thereby improving breathability and moisture absorption.

[0034] The long restraining threads A32 are long threads that are arranged parallel to the direction in which the mesh of the mesh portion A31 expands (hereinafter referred to as the long direction), and are arranged at equal intervals, penetrating the multiple meshes of the mesh portion A31 to fix the spacing between them. This spacing is preferably about 5 mm to 20 mm. In this embodiment, the long restraining threads A32 are arranged from one end to the other end of the surface of the mesh portion A31.

[0035] The short restraining threads A33 are short threads arranged parallel to the long direction (hereinafter referred to as the short direction), penetrating multiple meshes between the long restraining threads A32 and fixing the spacing between them, with a length of 5 mm to 35 mm. A plurality of short restraining threads A33 are arranged at equal intervals, and the intervals are at least shorter than the intervals between the long restraining threads A32, and it is preferable that they are arranged for each mesh, for example. Furthermore, the short restraining threads A33 are arranged in groups of 10 to 30 threads, with the distance between groups being 5 mm to 30 mm, so that they can deform and release the load even when a load is applied locally. More preferably, the short restraining threads A33 are provided so as to fix the same mesh as or adjacent to the long restraining threads A32, thereby making the stretchability of the mesh portion A31 lower.

[0036] The above-mentioned configuration suppresses deformation of the mesh in both the long and short directions and keeps stretchability low while enhancing design. Furthermore, since the length of the restraining threads is shorter in the short direction than in the long direction, stretchability can be kept even lower. In this embodiment, the surrounding low-elasticity portion A1 is arranged so that the thickness direction (stacked direction) and short length direction of the mattress X are parallel, which particularly suppresses deformation in the thickness direction when pressure is applied from the use portion, thereby preventing the gap from widening. The low-elasticity bottom surface portion A2 is provided so that the longitudinal direction and the transverse direction of the mattress X are parallel to each other, and the elasticity of the bottom surface is made uniform as a whole, making it difficult to deform. That is, in the low-elasticity portion A, the short direction is perpendicular to the axial side R, which prevents the axial side R itself from stretching and makes it difficult for the gap to widen.

[0037] Furthermore, as shown in Fig. 6, the mattress X may further include a sheet portion 4 that simultaneously covers the first portion 1, the second portion 2, and the third portion 3. The sheet portion 4 has a sheet body 41 that covers the portion to be used, and an attachment portion 42 that covers part of the side and bottom portions. Fig. 6(a) shows a plan view of the sheet portion 4 attached to the mattress X, Fig. 6(b) shows a bottom view, and Fig. 6(c) shows a side view.

[0038] The sheet body 41 is a fabric material that is placed on the used part when in use, and contains a predetermined thickness of fibers such as cotton or polyester stored inside to act as a cushion. It is preferable that the surface material of the sheet body 41 is substantially the same as the surface material of the used part. The sheet body 41 is also quilted in a direction parallel to the axial side R. By having the unevenness parallel to the direction in which the gaps are formed, the user is less likely to perceive the unevenness, further improving sleeping comfort. As long as the quilting includes parallel unevenness, quilting in other directions may also be provided.

[0039] The attachment portion 42 is a portion that is at least more elastic than the sheet body 41, and preferably has elasticity and slip performance to the extent that it can be changed between the use state and the storage state when attached, and as a material, for example, a highly elastic knit fabric can be used.

[0040] The mounting portion 42 has a mounting hole 43, which is an oval opening, in the center. The opening area of ​​the mounting hole 43 is smaller than the total area of ​​the bottom surface portions (124, 224, and 324), and an elastic member such as a rubber band is arranged around the edge of the hole, so that it contracts when attached to the mattress and is less likely to come off. Furthermore, the distance from the edge of the mounting hole 43 to the end of the mounting portion 42 is set longer than the length of the mattress X in the thickness direction at any position, so that the entire side of the mattress X can be covered. This covers the surrounding low-elasticity portion A1 to prevent deterioration, and also adds the elasticity of the mounting portion 42 to the mattress, narrowing the gap between portions.

[0041] The sheet body 41 may be made of the same material as the attachment portion 42 without being quilted. This allows the sheet body 41 to stretch, making attachment easier, improving handling performance, and facilitating washing.

[0042] A method for carrying out the present invention will be described in detail below with reference to Figures 1 to 7. The present invention is carried out by a user who uses mattress X. The method for carrying out the present invention is an example, and the method for carrying out the present invention is not limited to this, and the order of the steps may be reversed.

[0043] First, the user puts the mattress X, which is in the stored state, into the use state. That is, the user lifts and unfolds the first portion 1 of the mattress X, which is in the state shown in Fig. 1(b), to put it into the state shown in Fig. 1(a).

[0044] Next, the user covers the mattress X with the sheet part 4. That is, as shown in Figure 6, the user inserts the corners of the bottom surfaces of the first part 1 and the third part 3 into the attachment holes 43 of the sheet part 4, and then stretches the highly elastic attachment parts 42 so that the attachment parts 42 cover the entire side surfaces of the mattress X, thereby attaching the sheet part 4 to the mattress X.

[0045] Finally, the user lies down on the mattress X. At this time, the provision of the low-elasticity portion A as in the embodiment increases the elasticity of the used portion (121, 221, 321), making it easier to turn over in sleep. In addition, the narrow gap between the first opposing portion 122 and the second opposing portion 222 and the provision of the sheet portion 4 make it difficult for the user to feel the gap between the first portion 1 and the second portion 2, resulting in a comfortable sleep.

[0046] 7(a), when a force is applied in a direction that widens the gap during use, the first connecting portion 125 and the second connecting portion 225 are easily stretched, while the first mating portion 122 and the second mating portion 222 are made of a material that is resistant to deformation, minimizing deformation and movement of the internal cushion, particularly near the axial side R, and preventing the gap from widening. Furthermore, the axial side R itself is made of low-elasticity portion A, so the gap itself is less likely to widen. Furthermore, because the fabric is less likely to stretch, it is possible to prevent not only instantaneous gap widening but also gap widening caused by the fabric gradually stretching and not returning to its original shape even after long-term use. Additionally, even if the gap widens, the highly elastic first connecting portion 125 and second connecting portion 225 are exposed to the surface in use, so sleeping comfort can be maintained.

[0047] 7(b), when a force is applied in a direction perpendicular to the used portion during use, the first connecting portion 125 and the second connecting portion 225 are made of a material that is easy to stretch, while the first opposing portion 122 and the second opposing portion 222 are made of a material that is difficult to deform. Therefore, the first cushion 11 and the second cushion 21 deform near the first connecting portion 125 and the second connecting portion 225, and the first connecting portion 125 and the second connecting portion 225 move closer to each other, filling the gap. This further improves sleeping comfort. In particular, the provision of the surrounding low-elasticity portion A1 and the bottom low-elasticity portion A2 allows for control of cushion deformation.

[0048] Preferably, the elasticity of the first relative part 122 in the direction perpendicular to the axial side R is set lower than the elasticity of the first use part 121 in the direction perpendicular to the axial side R, thereby making it more difficult to stretch in the direction in which the axial side R expands, thereby narrowing the gap.

[0049] Preferably, the second cover 22 includes a second relative portion 222 that faces the first relative portion 122 when in use, and a second bottom surface portion 224 that is adjacent to the second relative portion 222 and comes into contact with the ground when in use, and at the axis side R, the end of the first relative portion 122 is sandwiched between the second relative portion 222 and the second bottom surface portion 224, thereby further narrowing the gap.

[0050] Preferably, the first cover 12 has a low-elasticity section A that is less elastic than the first use section 121, and the low-elasticity section A includes a surrounding low-elasticity section A1 that surrounds the side of the first cushion 11, thereby preventing deformation of the first cushion 11.

[0051] Preferably, the surrounding low-elasticity portion A1 is located adjacent to the bottom surface of the first cover 12, and the low-elasticity portion A has a bottom low-elasticity portion A2 located over the entire bottom surface of the first cover 12, thereby improving the sleeping comfort of the area in use while further suppressing deformation.

[0052] Preferably, the first cover 12 includes a first connecting portion 125 that connects the first use portion 121 and the first opposing portion 122, and the first connecting portion 125 has higher elasticity than the first opposing portion 122, and by opposing the second cover 22 in the use state, it deforms in conjunction with the low-elasticity portion A in accordance with the deformation of the cushion to narrow the gap, or is exposed at the top to improve sleeping comfort.

[0053] Preferably, the mattress X further includes a sheet portion 4 that covers at least the first use surface, and the sheet portion 4 is quilted parallel to the axial side R, thereby making gaps less noticeable and improving the comfort of use. [Explanation of symbols]

[0054] X Mattress 1 First part 11 First Cushion 12 First Cover 121 First use part 122 First Counterpart 123 First side part 124 First bottom part 125 First joint 2 Second part 21 Second Cushion 22 Second cover 221 Second usage part 222 Second Counselor 223 Second side part 224 Second bottom part 225 Second joint 226 Second Vice-President 3 Third part 31 Third Cushion 32 Third Cover 321 Third use part 322 Third Counselor 323 Third side part 324 Third bottom part 4 Sheet section 41 Sheet body 42 Mounting part 43 Mounting hole R axis side R1 First axis side R2 Second axis side A Low stretch part A1 Low-stretch enclosing section A2 Bottom low elasticity part A3 Low stretch surface A31 Mesh part A32 Long axis restraining thread A33 Short axis restraining thread B zipper

Claims

1. A folding mattress that can transition between a usage state in which a user lies down and a storage state in which it is folded, a first portion; and a second portion connected to the first portion by an axis and foldable relative to the first portion; The first portion includes a first cushion and a first cover that covers the first cushion. the second portion includes a second cushion and a second cover that covers the second cushion; the first cover includes a first use portion on which a user lies in use, and a first opposing portion adjacent to the axis and opposing the second cover in use, The stretchability of the first opposing portion is set lower than the stretchability of the first use portion, the first cover includes a first connecting portion that connects the first use portion and the first mating portion, The first connecting portion has higher elasticity than the first opposing portion, and is opposed to the second cover when in use.

2. A folding mattress in which the entire first connecting portion is located on the bottom side of the surface covered by the first use portion of the first cushion.

3. The foldable mattress according to claim 1 , wherein the stretchability of the first opposing portion in a direction perpendicular to the axial side is set lower than the stretchability of the first usable portion in a direction perpendicular to the axial side.

4. the first cover has a low-elasticity portion that is less elastic than the first use portion, The folding mattress according to claim 1 , wherein the low-elasticity portion includes a surrounding low-elasticity portion provided to surround a side surface of the first cushion.

5. The surrounding low-elasticity portion is provided adjacent to a bottom surface of the first cover, The foldable mattress according to claim 4 , wherein the low-elasticity portion comprises a bottom low-elasticity portion provided over the entire bottom surface of the first cover.

6. Further, a sheet portion covering at least the first use surface is provided, The folding mattress according to any one of claims 1 to 5, wherein the sheet portion is provided with quilting parallel to the axial side.

7. a first portion; and a second portion connected to the first portion by an axis and foldable relative to the first portion; the first portion has a first cushion; the second portion has a second cushion; A cover for a folding mattress that can transition between a use state in which a user lies down and a folded storage state, A first cover that covers the first cushion and a second cover that covers the second cushion, the first cover includes a first use portion on which a user lies in use, and a first opposing portion adjacent to the axis and opposing the second cover in use, The stretchability of the first opposing portion is set lower than the stretchability of the first use portion, the first cover includes a first connecting portion that connects the first use portion and the first mating portion, The first connecting portion has higher elasticity than the first opposing portion and faces the second cover when in use.

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