Multi-functional mattress

Abstract

To provide a multi-functional mattress where armrests can be easily formed.SOLUTION: A multi-functional mattress can be deformed into a mattress shape and a sofa shape having armrests. The multi-functional mattress includes: a center part for supporting a body; and side parts positioned on both sides of the center part in a lateral direction. Each one of the side parts is divided into three or more in the longitudinal direction by a bending part. In the sofa shape, the side parts are bent without being separated from the mattress shape so as to form the armrests.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a multi-function mattress. [Background technology]

[0002] 2. Description of the Related Art Multifunctional mattresses that can be folded and used as sofas are known (Patent Documents 1 to 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jpn. Jpn. Published No. 52-2661 [Patent Document 2] Japanese Utility Model Application Publication No. 5-88364 [Patent Document 3] JP 2008-212560 A [Patent Document 4] Utility Model Registration No. 3223774 Summary of the Invention [Problem to be solved by the invention]

[0004] An embodiment of the present invention provides a multi-function mattress with easily configured armrests. [Means for solving the problem]

[0005] The multifunctional mattress of the embodiment is a multifunctional mattress that can be transformed into a mattress shape and a sofa shape with armrests, and has a central portion that supports the body and side portions located on both sides of the short side of the central portion, the side portions being divided into three or more portions in the longitudinal direction by bending portions, and the sofa shape is characterized in that the armrests are formed by bending the side portions without separating them from the mattress shape. Effect of the Invention

[0006] An embodiment of the present invention can provide a multi-function mattress with easily configured armrests. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing a multi-function mattress according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the mattress shape. [Diagram 3] 1 is a plan view showing the inside of a cover of a multi-function mattress and a cushioning material contained within the cover. [Figure 4] FIG. 2 is a plan view of the mattress shape seen from above. [Diagram 5] 11 is an explanatory diagram showing an intermediate state when transforming from a mattress shape to a sofa shape. FIG. [Figure 6] FIG. 2 is a perspective view showing a first sofa shape. [Figure 7] FIG. 4 is an explanatory diagram showing an intermediate state when transforming from a first sofa shape to a second sofa shape. [Figure 8] FIG. 11 is a perspective view showing a second sofa shape. [Figure 9] FIG. 5 is a plan view similar to FIG. 4, showing a multi-function mattress according to a first modified example. [Figure 10] FIG. [Figure 11] FIG. 11 is a plan view of the mattress shape of a multi-function mattress according to a second embodiment of the present invention, seen from above. [Figure 12] 11 is an explanatory diagram showing an intermediate state when transforming from a mattress shape to a sofa shape. FIG. [Figure 13] FIG. 2 is a perspective view showing a first sofa shape. [Figure 14] FIG. 11 is a perspective view showing a second sofa shape. [Figure 15] FIG. 12 is a plan view similar to FIG. 11, showing a multi-function mattress according to a second modified example. [Figure 16] FIG. [Figure 17]FIG. 11 is a plan view of the mattress shape of a multi-function mattress according to a third embodiment of the present invention, seen from above. [Figure 18] 11 is an explanatory diagram showing an intermediate state when transforming from a mattress shape to a sofa shape. FIG. [Figure 19] FIG. 2 is a perspective view showing a first sofa shape. [Figure 20] FIG. 11 is a perspective view showing a second sofa shape. [Figure 21] FIG. 10 is a plan view similar to FIG. 3, showing a multi-function mattress according to a third modified example. [Figure 22] FIG. [Diagram 23] FIG. 11 is a plan view of the mattress shape of a multi-function mattress according to a fourth embodiment of the present invention, seen from above. [Figure 24] 11 is an explanatory diagram showing an intermediate state when transforming from a mattress shape to a sofa shape. FIG. [Diagram 25] FIG. 2 is a perspective view showing a first sofa shape. [Figure 26] 13 is an explanatory diagram showing a state in the middle of transforming into a second sofa shape. FIG. [Figure 27] FIG. 11 is a perspective view showing a second sofa shape. [Figure 28] FIG. 11 is a plan view showing the mattress shape of a multi-function mattress according to a fifth embodiment. [Figure 29] FIG. 1 is a perspective view showing a multi-function mattress on a bed. [Diagram 30] FIG. 13 is a plan view of the mattress shape of a multi-function mattress according to a fourth modified example, viewed from above. [Diagram 31] FIG. 13 is a plan view of the mattress shape of a multi-function mattress according to a fifth modified example, viewed from above. [Diagram 32] FIG. 13 is a plan view showing the mattress shape of a multi-function mattress according to a sixth embodiment. [Diagram 33] Fig. 33(a) is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape, and Fig. 33(b) is a perspective view showing the sofa shape. [Diagram 34]FIG. 13 is a plan view showing the mattress shape of a multi-function mattress according to a seventh embodiment. [Diagram 35] Figure 35(a) is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape, and Figure 35(b) is a perspective view showing the sofa shape. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] A multifunctional mattress according to an embodiment of the present invention will be described with reference to Figures 1 to 35. Figures 1 to 8 show a multifunctional mattress according to a first embodiment of the present invention. FIG. 1 is a perspective view showing a multi-function mattress according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the mattress shape. FIG. 3 is a plan view showing the inside of the cover of the multi-function mattress and the cushioning material contained within the cover. FIG. 4 is a plan view of the mattress shape seen from above.

[0009] As shown in Fig. 1, the multifunctional mattress 10 can be transformed into a mattress shape 11 and a sofa shape 13. The sofa shape 13 is formed by folding the multifunctional mattress 10 from the mattress shape 11. In this example, the sofa shape 13 has a first sofa shape 13a and a second sofa shape 13b. The first sofa shape 13a is a sofa shape with armrests. The second sofa shape 13b is a sofa shape without armrests.

[0010] The multifunctional mattress 10 has a cover 20 and a cushioning material 40 provided inside the cover 20. As shown in Figures 2 and 3, when the multifunctional mattress 10 (cover 20) is in the mattress shape 11, it has a rectangular parallelepiped shape having a total length L, a width W, and a thickness T.

[0011] The overall length L, width W, and thickness T of the multifunctional mattress 10 are set to values ​​that allow the mattress shape 11 to be easily transformed into the sofa shape 13. The overall length L and width W of the multifunctional mattress 10 must be set to values ​​that allow a user to sleep easily when in the mattress shape. The multifunctional mattress 10 is set, for example, to an overall length L of about 2 m and a width W of about 1 m. The thickness T of the multifunctional mattress 10 is set, for example, to about 10 to 14 cm, taking into consideration the ease of sleeping and the ease of transformation between the mattress shape 11 and the sofa shape 13.

[0012] The cushion material 40 is, for example, made of polyester fiber cotton, and constitutes the central core of the multifunctional mattress 10. As shown in Fig. 3, the multifunctional mattress 10 contains 55 pieces of cushion material 40 inside the cover 20. In other words, the multifunctional mattress 10 contains a plurality of divided cushion materials 40 inside the cover 20.

[0013] This allows, for example, dirty or old cushion materials 40 to be replaced individually. In addition, the user can use a plurality of cushion materials 40 with different hardness, for example, to create a multifunctional mattress 10 with different hardness in different parts to suit his / her preference. For example, the multifunctional mattress 10 shown in FIG. 3 uses four types of cushion materials 40a to 40d with different hardness in the longitudinal direction (total length L direction). The cushion material 40 may be divided into 55 or more pieces, or may be divided into 55 or less pieces.

[0014] As shown in FIG. 4, the multifunctional mattress 10 (cover 20) has a plurality of regions, which are defined by a cut portion 22 shown by a solid line, a mountain fold portion 23 shown by a dashed line, and a valley fold portion 24 shown by a broken line. The cut portion 22, the mountain fold portion 23, and the valley fold portion 24 form a bending portion when the mattress shape 11 is transformed into the sofa shape 13. The cut portion 22 is cut from the front surface 10a to the back surface 10b of the multifunctional mattress 10. The mountain fold portion 23 is a cut formed on the front surface 10a side of the multifunctional mattress 10, and is connected to an adjacent region on the back surface 10b side of the multifunctional mattress 10. The valley fold portion 24 is a cut formed on the back surface 10b side of the multifunctional mattress 10, and is connected to an adjacent region on the front surface 10a side of the multifunctional mattress 10. The multifunctional mattress 10 has a plurality of regions, a first region 31 to a ninth region 39.

[0015] The multifunctional mattress 10 has a central portion 25 that supports the body, and side portions 26 located on both sides of the central portion 25 in the short direction. The central portion 25 is located in the center in the short direction and extends in the longitudinal direction. The side portions 26 extend along the central portion 25 in the longitudinal direction. A part of the side portion 26 can be bent separately from the central portion 25 by the cut portion 22.

[0016] The central portion 25 is divided into three or more portions in the longitudinal direction by the mountain folds 23 and the valley folds 24. The central portion 25 is a portion that forms the seat surface and the backrest in the case of the sofa shape 13. The side portions 26 are divided into three or more portions in the longitudinal direction by bending portions such as the mountain folds 23, the valley folds 24, and the cut portions 22. The side portions 26 are portions that form the armrests and legs in the case of the first sofa shape 13a. That is, in the first sofa shape 13a, the armrests and legs are formed by bending the side portions 26.

[0017] The first region 31 is located on one side (left side in FIG. 4) in the longitudinal direction (total length L direction) of the multifunctional mattress 10, and is a convex region that protrudes toward the other side in a plan view. The first region 31 is a portion that becomes a backrest when the mattress is in the sofa shape 13.

[0018] The second regions 32 are located at both ends in the short direction (width W direction) of the multifunctional mattress 10 and are adjacent to the first region 31. The second region 32 has a first portion 32a adjacent to the first region 31 and a second portion 32b adjacent to the other side of the first portion 32a. That is, the first portion 32a and the second portion 32b are aligned in the longitudinal direction. The second region 32 is a portion that becomes an armrest in the case of the first sofa shape 13a.

[0019] Fixing members 45a, 45b are provided on the side where the first region 31 and the first portion 32a of the second region 32 come into contact with each other (see FIG. 5). The fixing members 45a, 45b are, for example, hook-and-loop fasteners, and detachably bond the first region 31 and the first portion 32a. The fixing members 45a, 45b are not limited to hook-and-loop fasteners, and may be fasteners having a slide. Any fixing members 45a, 45b may be used as long as they can detachably bond the first region 31 and the second region 32. The fixing members 45a, 45b prevent the second region 32 from shifting relative to the first region 31.

[0020] The third region 33 is adjacent to the second region 32 in the longitudinal direction. The third region 33 is provided on both ends in the short direction (width W direction) of the multifunctional mattress 10. The third region 33 is a portion that becomes the front upper leg portion in the first sofa shape 13a, and is a portion that becomes the seat surface in the second sofa shape 13b.

[0021] The fourth region 34 is located on the other side in the longitudinal direction than the first region 31. The fourth region 34 is a convex region that protrudes toward one side (the first region 31 side) in a plan view. The fourth region 34 has a first portion 34a adjacent to the first region 31, a second portion 34b adjacent to the other side of the first portion 34a, and a third portion 34c adjacent to the second portion 34b in the short direction.

[0022] The first portion 34a becomes the back surface when the sofa has the sofa shape 13, and is a portion on which the first region 31 is placed. The second portion 34b becomes the seat surface when the sofa has the sofa shape 13. The third portion 34c becomes the front and middle legs when the sofa has the first sofa shape 13a, and is a portion that becomes the seat surface when the sofa has the second sofa shape 13b.

[0023] The fifth region 35 is adjacent to the third portion 34c of the fourth region 34 in the longitudinal direction. The fifth region 35 is provided on both ends in the short direction (width W direction) of the multifunctional mattress 10. The fifth region 35 is a portion that becomes the rear upper leg portion in the case of the sofa shape 13.

[0024] The sixth region 36 is adjacent to the fifth region 35 in the longitudinal direction. The sixth region 36 is provided on both ends in the short direction (width W direction) of the multifunctional mattress 10. The sixth region 36 is a portion that becomes the rear middle leg portion in the case of the sofa shape 13.

[0025] The seventh region 37 is located on the other side of the fourth region 34 in the longitudinal direction. The seventh region 37 is a convex region that protrudes toward one side (the fourth region 34 side) in a plan view. The seventh region 37 has a first portion 37a adjacent to the fourth region 34 and a second portion 37b adjacent to the first portion 37a in the short direction. The first portion 37a is a portion that is located between the fourth region 34 and the eighth region 38 in the case of the sofa shape 13. The second portion 37b is a portion that becomes the rear lower leg portion in the case of the sofa shape 13.

[0026] The eighth region 38 is located on the other side (right side in FIG. 4) of the longitudinal direction (total length L direction) of the multifunctional mattress 10, and is adjacent to the seventh region 37. The eighth region 38 is an area formed in a concave shape on both ends in the lateral direction. The eighth region 38 is a portion that becomes a placement surface portion that is placed on the floor surface in the case of the sofa shape 13. The longitudinal dimension of the fourth region 34, the longitudinal dimension of the seventh region 37, and the longitudinal dimension of the eighth region 38 are the same length.

[0027] The ninth region 39 is located in a concave recessed region of the eighth region 38. The ninth region 39 is provided on each side of the multifunctional mattress 10 in the short direction. The ninth region 39 is a portion that becomes the front lower leg portion in the case of the sofa shape 13. The first portion 32a and the second portion 32b of the second region 32, the third region 33, the fifth region 35, the sixth region 36, and the ninth region 39 are the same size and shape.

[0028] Next, the case where the mattress shape 11 is transformed into the first sofa shape 13a will be described with reference to Figs. FIG. 5 is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape. FIG. 6 is a perspective view showing the first sofa shape.

[0029] First, as shown in Fig. 5, the ninth region 39 is valley-folded relative to the eighth region 38, and the ninth region 39 is placed on the eighth region 38. Next, the seventh region 37 is valley-folded relative to the eighth region 38, and the seventh region 37 is placed on the eighth region 38. Next, the sixth region 36 is mountain-folded relative to the seventh region 37, and the fifth region 35 is valley-folded relative to the sixth region 36, so that the sixth region 36 and the fifth region 35 are placed on the second portion 37b of the seventh region 37.

[0030] Next, the fourth region 34 is mountain-folded relative to the seventh region 37, and the fourth region 34 is placed on the seventh region 37. Next, the first region 31 is valley-folded relative to the fourth region 34, and the middle portion of the first region 31 is mountain-folded, and the first region 31 is placed on the fourth region 34.

[0031] Next, the third region 33 is folded in a valley shape relative to the fourth region 34, and the third region 33 is placed on the third portion 34c of the fourth region 34. Finally, the second region 32 is folded in a mountain shape relative to the third region 33, and the second portion 32b of the second region 32 is placed on the third region 33, thereby transforming the mattress shape 11 into the first sofa shape 13a. Note that, for convenience of explanation, FIG. 5 shows a state in which the adhesive between the fixing member 45a and the fixing member 45b has been peeled off, but in the transformation from the mattress shape 11 to the first sofa shape 13a, the fixing member 45a and the fixing member 45b may remain adhesive to each other.

[0032] As shown in FIG. 4, the multifunctional mattress 10 has mountain folds 23 and valley folds 24 alternately arranged in the longitudinal direction between the first region 31, the fourth region 34, the seventh region 37, and the eighth region 38. As a result, as shown in FIG. 5, the first region 31 can be lifted and the seventh region 37 and the fourth region 34 can be easily stacked on the eighth region 38. In this case, the thickness T of the multifunctional mattress 10 is about 10 to 14 cm. Therefore, the user can easily lift the first region 31 to transform the mattress shape 11 into the first sofa shape 13a. In addition, the multifunctional mattress 10 is transformed into the first sofa shape 13a by bending the center and side parts without separating them from the other parts, so that the effort of separation and joining can be eliminated. In addition, the multifunctional mattress 10 can reduce lateral slippage in the first sofa shape 13a, so that a stable sitting comfort can be achieved.

[0033] The fixing members 45a, 45b may be provided not only in the first region 31 and the second region 32 but also in any other region. By providing the fixing members 45a, 45b, the mattress shape 11 and the sofa shape 13 can be effectively maintained.

[0034] As shown in Fig. 6, in the sofa shape 13, the height position from the floor surface to the upper surface of the second region 32, which is the armrest, is five times the thickness T of the multifunctional mattress 10, due to the eighth region 38, the ninth region 39, the fourth region 34, the third region 33, and the second region 32. That is, in the sofa shape 13, the height to the armrest is five layers. If the thickness T of the multifunctional mattress 10 is about 10 to 14 cm, the height from the floor surface to the armrest is 50 to 70 cm.

[0035] This allows the height of the armrests to be secured even if the thickness T of the multifunctional mattress 10 is made as small as possible. In addition, by making the thickness T of the multifunctional mattress 10 small, the armrests can be easily formed in the sofa shape 13.

[0036] As shown in Fig. 6, in the sofa shape 13, the height position to the upper surface of the second part 34b of the fourth region 34, which is the seating surface, is three times the thickness T of the multifunctional mattress 10 due to the eighth region 38, the seventh region 37, and the fourth region 34. That is, in the sofa shape 13, the height to the seating surface is three layers. If the thickness T of the multifunctional mattress 10 is about 10 to 14 cm, the height from the floor surface to the seating surface is 30 to 42 cm.

[0037] As a result, when the multifunctional mattress 10 is in the sofa shape 13, the height below the knees of a seated user can be ensured. In addition, armrests are formed by the second region 32 on both sides of the seat surface. These armrests are located two layers above the seat surface. Therefore, the multifunctional mattress 10 can be made into a sofa shape 13 (first sofa shape 13a) that provides stable seating comfort.

[0038] Furthermore, since conventional multifunctional mattresses are simply mattresses that have been folded and transformed into sofas, there is a risk that they may be recognized as transformed mattresses even in the sofa shape. However, in the multifunctional mattress 10, a space S1 is formed below the first portion 32a of the second region 32 between the front leg portion and the rear leg portion in the first sofa shape 13a. Also, as described above, in the sofa shape 13, the seat position is high. This makes it difficult to recognize that the multifunctional mattress 10 is transformed from the mattress shape 11 when it is in the sofa shape 13. In other words, the sofa shape 13 of the multifunctional mattress 10 can improve the design.

[0039] Next, the case where the first sofa shape 13a is transformed into the second sofa shape 13b will be described with reference to Figs. FIG. 7 is an explanatory diagram showing an intermediate state when the sofa shape is transformed from the first sofa shape to the second sofa shape. FIG. 8 is a perspective view showing the second sofa shape.

[0040] First, as shown in Fig. 7, the fixing member 45b of the second region 32 is peeled off from the fixing member 45a of the first region 31. Next, the third region 33 is folded back toward the first region 31, and the second region 32 is stored in the space S1. This allows the sofa to be transformed from the first sofa shape 13a having armrests to the second sofa shape 13b not having armrests, as shown in Fig. 8.

[0041] In the second sofa shape 13b, the seat surface can be made wider by the armrests. As a result, for example, the first sofa shape 13a can be used as a one-seater sofa with armrests, and the second sofa shape 13b can be used as a two-seater sofa with a wider seat surface without armrests. In addition, the first sofa shape 13a shows a case where armrests are provided on both sides. However, the multifunctional mattress 10 can also be transformed into a sofa shape with armrests only on one side. In this way, the multifunctional mattress 10 can be easily transformed into the mattress shape 11, the first sofa shape 13a, and the second sofa shape 13b according to the user's living environment. In addition, the multifunctional mattress 10 is transformed into the sofa shape 13 by bending the center and side parts without separating them from the other parts, so that the effort of separation and joining can be eliminated. In addition, the multifunctional mattress 10 can reduce lateral slippage in the sofa shape 13, so that a stable sitting comfort can be achieved.

[0042] In the multifunctional mattress 10, the support surface (the back surface of the eighth region 38) that is placed on the floor surface in the sofa shape 13 becomes the back surface 10b in the mattress shape 11. In addition, in the multifunctional mattress 10, the exposed surface in the up-down direction in the sofa shape 13 becomes the front surface 10a in the mattress shape 11. In other words, in the multifunctional mattress 10, a part of the front surface 10a in the mattress shape 11 becomes the exposed surface (upper surface) even in the sofa shape 13.

[0043] In other words, when the multifunctional mattress 10 is transformed from the mattress shape 11 to the sofa shape 13, the front surface 10a does not come into contact with the floor surface. Also, in the sofa shape 13, the back surface 10b that comes into contact with the floor surface in the mattress shape 11 is inverted so as not to become an exposed surface (upper surface). Furthermore, as shown in FIG. 5, when the regions of the multifunctional mattress 10 overlap, the front surfaces and the back surfaces overlap. This allows the multifunctional mattress 10 to prevent dust from adhering to the front surface 10a from the floor surface or the like. Therefore, the multifunctional mattress 10 can effectively maintain a hygienic state in both the mattress shape 11 and the sofa shape 13.

[0044] The multifunctional mattress 10 (cover 20) may be formed with the first region 31 to the ninth region 39 each formed as a separate body. The multifunctional mattress 10 (cover 20) may also be formed by combining two or more regions and forming them as separate bodies from the other regions. The regions formed as separate bodies may be connected to the other regions by fasteners or the like. For example, the first region 31 may be formed as a separate body from the second region 32 and the fourth region 34, and a fastener or the like may be provided in the valley fold 24 between the first region 31 and the fourth region 34. This allows the cover 20 to be replaced only in the soiled region, rather than replacing the entire cover 20.

[0045] Next, a multifunction mattress 15 according to a first modified example will be described with reference to Figs. The multifunctional mattress 15 is a partially modified version of the multifunctional mattress 10. The multifunctional mattress 15 can be transformed into a mattress shape 16 and a sofa shape 17 having armrests. The multifunctional mattress 15 cannot be transformed into a sofa shape without armrests. FIG. 9 is a plan view similar to FIG. 4, showing a multifunction mattress according to a first modified example. FIG. 10 is a perspective view showing a sofa shape.

[0046] As shown in Fig. 9, the multifunctional mattress 15 has a first region 31 and a second region 32 integrally formed. Also, the second region 32 has a first portion 32a and a second portion 32b integrally formed. This allows the multifunctional mattress 15 to be transformed only into a sofa shape 17 with armrests, as shown in Fig. 10.

[0047] The multifunctional mattress 15 has the same shape and configuration as the multifunctional mattress 10 from the third region 33 to the ninth region 39. Therefore, the third region 33 to the ninth region 39 can be made common between the multifunctional mattress 10 and the multifunctional mattress 15, thereby reducing costs.

[0048] For example, the first region 31 to the third region 33 of the multifunctional mattress 10 can be made separable from the fourth region 34 by a fastener or the like. The multifunctional mattress 10 can be easily changed into a multifunctional mattress 15 by removing the first region 31 to the third region 33 of the multifunctional mattress 10 from the fourth region 34 and changing the multifunctional mattress 10 into one in which the first region 31 to the third region 33 are integrated as shown in FIG.

[0049] Next, a multifunctional mattress 50 according to a second embodiment will be described with reference to Figures 11 to 14. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 11 is a plan view of the mattress shape of a multi-function mattress according to a second embodiment of the present invention, seen from above.

[0050] The multifunctional mattress 50 can be transformed into a mattress shape 51 and a sofa shape 52. The sofa shape 52 has a first sofa shape 52a having armrests and a second sofa shape 52b having no armrests. The multifunctional mattress 50 has a plurality of regions, a first region 61 to a seventh region 67.

[0051] The first region 61 is located on one side (left side in FIG. 11) in the longitudinal direction (total length L direction) of the multifunctional mattress 50, and is a convex region that protrudes toward the other side in a plan view. The first region 61 is a portion that becomes a backrest when the mattress is in the sofa shape 52.

[0052] The second regions 62 are located at both ends in the short direction (width W direction) of the multifunctional mattress 50 and are adjacent to the first region 61. The second region 62 has a first portion 62a adjacent to the first region 61 and a second portion 62b adjacent to the other side of the first portion 62a. That is, the first portion 62a and the second portion 62b are aligned in the longitudinal direction. The second region 62 is a portion that becomes an armrest in the case of the first sofa shape 52a.

[0053] The third region 63 is adjacent to the second region 62 in the longitudinal direction. The third region 63 is provided on both ends in the short direction (width W direction) of the multifunctional mattress 50. The third region 63 is a portion that becomes the front upper leg portion in the first sofa shape 52a, and is a portion that becomes the back portion in the second sofa shape 52b.

[0054] The fourth region 64 is adjacent to the third region 63 in the longitudinal direction. The fourth region 64 is provided on both ends of the multifunctional mattress 50 in the short direction (width W direction). The fourth region 64 is a portion that becomes the rear upper leg portion in the first sofa shape 52a, and a portion that becomes a support surface portion that is placed on the floor surface in the second sofa shape 52b. The first portion 62a and the second portion 62b of the second region 62, the third region 63, and the fourth region 64 have the same size and shape.

[0055] The fifth region 65 is located on the other side in the longitudinal direction than the first region 61. The fifth region 65 is a convex region that protrudes toward one side (the first region 61 side) in a plan view. The fifth region 65 has a first portion 65a adjacent to the first region 61, a second portion 65b adjacent to the other side of the first portion 65a, and a third portion 65c adjacent to the other side of the second portion 65b.

[0056] The first portion 65a becomes the back surface when the sofa has the sofa shape 52, and is a portion on which the first region 61 is placed. The second portion 65b becomes the back surface when the sofa has the sofa shape 52, and is a portion located between the first portion 65a and the third portion 65c. The third portion 65c becomes the support surface that is placed on the floor when the sofa has the sofa shape 52.

[0057] The sixth region 66 is located on the other side in the longitudinal direction than the fifth region 65. In the case of the sofa shape 52, the sixth region 66 is placed on the third portion 65c of the fifth region 65 and is disposed between the third portion 65c and the seventh region 67. Both sides in the short direction of the sixth region 66 are portions that become the lower legs in the case of the sofa shape.

[0058] The seventh region 67 is located on the other side (right side in FIG. 11) of the longitudinal direction (total length L direction) of the multifunctional mattress 50, and is adjacent to the sixth region 66. The central part of the seventh region 67 is the part that becomes the seat surface in the case of the sofa shape 52. Both sides of the seventh region 67 in the short direction are the parts that become the middle leg parts in the case of the first sofa shape 52a, and the parts that become the seat surface in the case of the second sofa shape 52b. The longitudinal dimension of the third portion 65c of the fifth region 65, the longitudinal dimension of the sixth region 66, and the longitudinal dimension of the seventh region 67 are the same length.

[0059] Next, the case where the mattress shape 51 is transformed into the first sofa shape 52a will be described with reference to Figs. FIG. 12 is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape. FIG. 13 is a perspective view showing the first sofa shape.

[0060] 12, in the multifunctional mattress 50, the third portion 65c of the fifth region 65 located in the center in the longitudinal direction when the mattress is in the mattress shape 51 serves as a support surface portion to be placed on the floor. Then, the sixth region 66 is valley-folded relative to the fifth region 65, and the seventh region 67 is mountain-folded relative to the sixth region 66, so that the sixth region 66 and the seventh region 67 are placed on the third portion 65c of the fifth region 65.

[0061] Next, the second portion 65b of the fifth region 65 is valley-folded relative to the third portion 65c, and the first portion 65a is mountain-folded relative to the second portion 65b, so that the second portion 65b and the first portion 65a are placed on the third portion 65c of the fifth region 65. Next, the first region 61 is valley-folded relative to the fifth region 65, and the middle portion of the first region 61 is mountain-folded, so that the first region 61 is placed on the first portion 65a of the fifth region 65.

[0062] Finally, the third region 63 is folded relative to the second region 62, and the third region 63 and the fourth region 64 are placed on the seventh region 67. As a result, the second region 62 is disposed on the third region 63 and the fourth region 64. By folding each region in this manner, the multifunctional mattress 50 can be transformed from the mattress shape 51 to the first sofa shape 52a. Note that the multifunctional mattress 50 may also be provided with fixing members (not shown) between each region to effectively maintain the shapes of the mattress shape 51 and the sofa shape 52.

[0063] Next, the case where the first sofa shape 52a is transformed into the second sofa shape 52b will be described with reference to Figs. FIG. 14 is a perspective view showing the second sofa shape.

[0064] 13, when the multifunctional mattress 50 is in the first sofa shape 52a, a space S2 is formed below the first region 61 that serves as a backrest. To transform the first sofa shape 52a into the second sofa shape 52b, the second region 62 to the fourth region 64 are stored in the space S2.

[0065] Specifically, first, the third region 63 and the fourth region 64 folded under the second region 62 are returned to be in a straight line with the second region 62. Next, the first portion 62a of the second region 62 is mountain-folded relative to the first region 61, and then the second portion 62b is valley-folded relative to the first portion 62a. Next, the third region 63 is mountain-folded relative to the second portion 62b, and the fourth region 64 is valley-folded relative to the third region 63. This causes the second region 62 to the fourth region 64 to be stored in the space S2. As a result, as shown in FIG. 14, the first sofa shape 52a having armrests can be transformed into the second sofa shape 52b having no armrests.

[0066] Thus, the multifunctional mattress 50 according to the second embodiment can have the same action and effect as the multifunctional mattress 10 according to the first embodiment. When the multifunctional mattress 50 is transformed from the mattress shape 51 to the sofa shape 52, the fifth region 65 located in the center of the longitudinal direction serves as a placement surface portion to be placed on the floor. This allows the user to easily transform the mattress shape 51 to the sofa shape 52 without lifting the first region 61 or the seventh region 67 high. Furthermore, when the multifunctional mattress 50 is transformed into the second sofa shape 52b, the entire seventh region 67 can be used as a seat surface. This allows the second sofa shape 52b to reduce unevenness of the seat surface as much as possible. Furthermore, the multifunctional mattress 50 is transformed into the sofa shape 52 by bending the center and side portions without separating them from the other portions, eliminating the need for the effort of separation and joining. Furthermore, the multifunctional mattress 50 can reduce lateral slippage in the sofa shape 52, providing a stable sitting experience.

[0067] Next, a multifunctional mattress 55 according to a second modified example will be described with reference to Figs. 15 and 16. The multifunctional mattress 55 is a partially modified version of the multifunctional mattress 50. The multifunctional mattress 55 can be transformed into a mattress shape 56 and a sofa shape 57 having armrests. The multifunctional mattress 55 cannot be transformed into a sofa shape without armrests. FIG. 15 is a plan view similar to FIG. 11, showing a multifunction mattress according to a second modified example. FIG. 16 is a perspective view showing a sofa shape.

[0068] As shown in Fig. 15, the multifunctional mattress 55 has a first region 61 and a second region 62 integrally formed. In addition, the second region 62 has a first portion 62a and a second portion 62b integrally formed. In addition, the multifunctional mattress 55 has a third region 63 and a fourth region 64 integrally formed. As a result, as shown in Fig. 16, the multifunctional mattress 55 can only be transformed into a sofa shape 57 with armrests.

[0069] The fifth region 65 to the seventh region 67 of the multifunctional mattress 55 have the same shape and configuration as the multifunctional mattress 50. Therefore, the fifth region 65 to the seventh region 67 can be made common between the multifunctional mattress 50 and the multifunctional mattress 55, thereby reducing costs.

[0070] For example, the first region 61 to the fourth region 64 of the multifunctional mattress 50 can be made separable from the fifth region 65 with a fastener or the like. The multifunctional mattress 50 can be easily changed into a multifunctional mattress 55 by removing the first region 61 to the fourth region 64 of the multifunctional mattress 50 from the fifth region 65 and changing it into one in which the first region 61 to the fourth region 64 are integrated as shown in FIG.

[0071] Next, a multifunctional mattress 70 according to a third embodiment will be described with reference to Figures 17 to 20. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 17 is a plan view of the mattress shape of a multi-function mattress according to a third embodiment of the present invention, seen from above.

[0072] The multifunctional mattress 70 can be transformed into a mattress shape 71 and a sofa shape 72. The sofa shape 72 has a first sofa shape 72a having armrests and a second sofa shape 72b having no armrests. The multifunctional mattress 70 has a plurality of regions, a first region 81 to a ninth region 89.

[0073] The first region 81 is located on one side (left side in FIG. 17) in the longitudinal direction (total length L direction) of the multifunctional mattress 70, and is a convex region that protrudes toward the other side in a plan view. The first region 81 is a portion that becomes a backrest when the mattress is in the sofa shape 72.

[0074] The second region 82 is located at both ends in the short direction (width W direction) of the multifunctional mattress 70 and is adjacent to the first region 81. The second region 82 is disposed below the first region 81 in the case of the sofa shape 72, and is a portion that becomes the rear upper leg portion.

[0075] The third region 83 is adjacent to the second region 82. The third region 83 is provided on both ends of the multifunctional mattress 70 in the short direction (width W direction). The third region 83 has a first portion 83a adjacent to the second region 82 and a second portion 83b adjacent to the other side of the first portion 83a. The first portion 83a is disposed under the second region 82 in the case of the sofa shape 72, and serves as the rear center leg portion. The second portion 83b is disposed in front of the first portion 83a, and serves as the front center leg portion in the case of the first sofa shape 72a, and serves as the seat surface in the case of the second sofa shape 72b.

[0076] The fourth region 84 is adjacent to the third region 83. The fourth region 84 is provided on both ends in the short direction (width W direction) of the multifunctional mattress 70. The fourth region 84 is disposed in front of the second region 82 to become the front upper leg portion in the first sofa shape 72a, and becomes the seat surface in the second sofa shape 72b.

[0077] The fifth region 85 is adjacent to the fourth region 84. The fifth region 85 is provided on both ends of the multifunctional mattress 70 in the short direction (width W direction). The fifth region 85 has a first portion 85a adjacent to the fourth region 84 and a second portion 85b adjacent to the other side of the first portion 85a. That is, the first portion 85a and the second portion 85b are aligned in the longitudinal direction. The fifth region 85 is a portion that becomes an armrest in the case of the first sofa shape 72a. The first portion 83a and the second portion 83b of the second region 82 and the third region 83, the fourth region 84, and the first portion 85a and the second portion 85b of the fifth region 85 have the same size and shape.

[0078] The sixth region 86 is located on the other side of the first region 81 in the longitudinal direction. The sixth region 86 has a first portion 86a adjacent to the first region 81 and a second portion 86b adjacent to the other side of the first portion 86a. The first portion 86a is a portion on which the first region 81 is placed in the case of the sofa shape 72. The second portion 86b is a portion that becomes the seat surface in the case of the sofa shape 72.

[0079] The seventh region 87 is located on the other side of the sixth region 86 in the longitudinal direction. The seventh region 87 is a convex region that protrudes toward one side (the sixth region 86 side) in a plan view. The seventh region 87 has a first portion 87a adjacent to the sixth region 86 and a second portion 87b located on both ends of the first portion 87a in the short direction. The first portion 87a is a portion that is located between the sixth region 86 and the eighth region 88 in the case of the sofa shape 72. The second portion 87b is a portion that becomes the rear lower leg portion in the case of the sofa shape 72.

[0080] The eighth region 88 is located on the other side of the seventh region 87 in the longitudinal direction. The eighth region 88 is a convex region that protrudes toward the other side. In the case of the sofa shape 72, the eighth region 88 serves as a placement surface portion that is placed on the floor surface. The longitudinal dimension of the sixth region 86, the longitudinal dimension of the seventh region 87, and the longitudinal dimension of the eighth region 88 are all the same length.

[0081] The ninth region 89 is adjacent to the eighth region 88. The ninth region 89 is provided on each of both ends in the short direction of the multifunctional mattress 70. The ninth region 89 is a portion that is disposed above the eighth region 88 and becomes the front lower leg portion in the case of the first sofa shape 72a.

[0082] Next, the case where the mattress shape 71 is transformed into the first sofa shape 72a will be described with reference to Figs. FIG. 18 is an explanatory diagram showing a state in the middle of transforming from the mattress shape to the sofa shape. FIG. 19 is a perspective view showing the first sofa shape.

[0083] First, the ninth region 89 is valley-folded relative to the eighth region 88, and the ninth region 89 is placed on the eighth region 88. Next, the seventh region 87 is valley-folded relative to the eighth region 88, and the seventh region 87 is placed on the eighth region 88. Next, the sixth region 86 is mountain-folded relative to the seventh region 87, and the sixth region 86 is placed on the seventh region 87. Next, the first region 81 is valley-folded relative to the sixth region 86, and the middle portion of the first region 81 is mountain-folded, and the first region 81 is placed on the first portion 86a of the sixth region 86.

[0084] Next, the second region 82 is mountain-folded relative to the first region 81, and the second region 82 is disposed below the first region 81. Next, the third region 83 is valley-folded relative to the second region 82, and the first portion 83a of the third region 83 is disposed below the second region 82. Next, the fourth region 84 is valley-folded relative to the third region 83, and the fourth region 84 is disposed on the second portion 83b of the third region 83.

[0085] Finally, the fifth region 85 is mountain-folded relative to the fourth region 84. This allows the fifth region 85 to be positioned above the fourth region 84 and to protrude forward from the first region 81. By folding each region in this manner, the multifunctional mattress 70 can be transformed from the mattress shape 71 to the first sofa shape 72a. Note that the multifunctional mattress 70 may also be provided with fixing members (not shown) between each region to effectively maintain the shapes of the mattress shape 71 and the sofa shape 72.

[0086] Next, the case where the first sofa shape 72a is transformed into the second sofa shape 72b will be described with reference to Figs. FIG. 20 is a perspective view showing the second sofa shape.

[0087] 19, in the multifunctional mattress 70, a space S3 is formed below the second portion 85b of the fifth region 85, which serves as an armrest, when the mattress is in the first sofa shape 72a. To transform the mattress 70 from the first sofa shape 72a to the second sofa shape 72b, the fourth region 84 and the fifth region 85 are stored in the space S3.

[0088] Specifically, first, the second portion 85b of the fifth region 85 is folded relative to the first portion 85a, and the second portion 85b is placed on the first portion 85a. Next, the fourth region 84, which has been folded relative to the third region 83, is returned to be in a straight line with the third region 83, thereby storing the fourth region 84 and the fifth region 85 in the space S3. This allows the sofa to be transformed from the first sofa shape 72a having armrests to the second sofa shape 72b not having armrests, as shown in Fig. 20.

[0089] Thus, the multifunctional mattress 70 according to the third embodiment can have the same functions and effects as the multifunctional mattress 10 according to the first embodiment. The multifunctional mattress 70 is transformed into a sofa shape 72 by bending the center and side parts without separating them from the other parts, eliminating the need for separation and joining. Furthermore, the multifunctional mattress 70 can reduce lateral slippage in the sofa shape 72, providing a stable sitting experience.

[0090] Next, a multifunctional mattress 75 according to a third modified example will be described with reference to Figs. 21 and 22. The multifunctional mattress 75 is a partially modified version of the multifunctional mattress 70. The multifunctional mattress 75 can be transformed into a mattress shape 76 and a sofa shape 77 having armrests. The multifunctional mattress 75 cannot be transformed into a sofa shape without armrests. FIG. 21 is a plan view similar to FIG. 3, showing a multi-function mattress according to a third modified example. FIG. 22 is a perspective view showing a sofa shape.

[0091] As shown in Fig. 21, the multifunctional mattress 75 has a first region 81, a second region 82, and a first portion 83a of the third region 83 formed integrally. A cut portion 22 is formed between the first portion 83a and the second portion 83b of the third region 83. The fourth region 84 and the first portion 85a of the fifth region 85 are formed integrally. This allows the multifunctional mattress 75 to be transformed only into a sofa shape 77 with armrests, as shown in Fig. 22.

[0092] The sixth region 86 to the ninth region 89 of the multifunctional mattress 75 have the same shape and configuration as the multifunctional mattress 70. Therefore, the sixth region 86 to the ninth region 89 can be made common between the multifunctional mattress 70 and the multifunctional mattress 75, thereby reducing costs.

[0093] Next, a multifunctional mattress 90 according to a fourth embodiment will be described with reference to Figures 23 to 27. In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 23 is a plan view of the mattress shape of a multi-function mattress according to a fourth embodiment of the present invention, seen from above.

[0094] The multifunctional mattress 90 has the same configuration as the multifunctional mattress 10 except that the cut portion 22 formed between the first region 31 and the second region 32 of the multifunctional mattress 10 according to the first embodiment is changed to a mountain fold portion 23. Moreover, the multifunctional mattress 90 is provided with fixing members 95a to 95d instead of the fixing members 45a, 45b provided on the multifunctional mattress 10.

[0095] The fixing members 95a to 95d are, for example, fasteners having a slide. The fixing members 95a to 95d may be hook-and-loop fasteners. The fixing members 95a to 95d are provided on the side portions 26 of the multifunctional mattress 90, respectively.

[0096] In the case of the mattress shape 91, the fixing member 95a is located between the first region 31 and the second region 32 and is provided in the first region 31. In the case of the mattress shape 91, the fixing member 95b is provided in the first portion 32a of the second region 32 at a position corresponding to the fixing member 95a. In the case of the mattress shape 91, the fixing member 95c is located between the second portion 32b of the second region 32 and the third region 33 and is provided in the third region 33. In the case of the mattress shape 91, the fixing member 95d is located between the third portion 34c of the fourth region 34 and the fifth region 35 and is provided in the third portion 34c.

[0097] Next, the case where the mattress shape 91 is transformed into the first sofa shape 92a will be described with reference to Figs. FIG. 24 is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape. FIG. 25 is a perspective view showing the first sofa shape.

[0098] As shown in Figures 24 and 25, the multifunctional mattress 90 can be transformed from the mattress shape 91 into a first sofa shape 92a having armrests by the same procedure as the multifunctional mattress 10. For ease of explanation, Figure 24 shows a state in which the adhesive between the fixing members 95a and 95b has been removed, but when transforming from the mattress shape 91 into the first sofa shape 92a, the fixing members 95a and 95b may remain attached to each other.

[0099] 25, in the first sofa shape 92a, the fixing member 95c and the fixing member 95d are bonded together. This makes it possible to prevent the second part 32b of the second region 32 from lifting up when the user rests his / her elbow on the second region 32. This improves the sitting comfort of the first sofa shape 92a.

[0100] Next, a case where the sofa is transformed into the second sofa shape 92b having no armrests will be described. FIG. 26 is an explanatory diagram showing a state during transformation into the second sofa shape. FIG. 27 is a perspective view showing the second sofa shape.

[0101] First, as shown in FIG. 26, in the mattress shape 91, the seventh region 37 is valley-folded relative to the eighth region 38, and the fourth region 34 is mountain-folded relative to the seventh region 37. Next, the adhesive between the fixing member 95a and the fixing member 95b is peeled off, and the first portion 32a of the second region 32 is folded downward from the first region 31, and the first portion 32a is placed on the second portion 32b. Also, the first region 31 is mountain-folded relative to the second region 32 and the fourth region 34, and the first region 31 is placed on the second region 32 and the fourth region 34. Finally, the fixing member 95b is adhered to the fixing member 95c.

[0102] 27, the multifunctional mattress 90 can be transformed from the mattress shape 91 into a second sofa shape 92b that does not have armrests. In this case, even if the user leans against the backrest (first region 31), the fixing members 95b and 95c are bonded together, so that the backrest is prevented from falling backward. This improves the comfort of sitting in the second sofa shape 92b.

[0103] The multifunctional mattress 90 according to the fourth embodiment can have the same action and effect as the multifunctional mattress 10 according to the first embodiment. The multifunctional mattress 90 is transformed into the first sofa shape 92a and the second sofa shape 92b by bending the center and side parts without separating them from the other parts, which eliminates the need for separation and joining. Furthermore, the multifunctional mattress 50 can reduce lateral slippage in the first sofa shape 92a and the second sofa shape 92b, which provides a stable sitting experience.

[0104] Next, a multifunctional mattress 100 according to a fifth embodiment will be described with reference to Figures 28 and 29. In the fifth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 28 is a plan view showing the mattress shape of the multi-function mattress according to the fifth embodiment. FIG. 29 is a perspective view showing a multi-function mattress on a bed.

[0105] The multifunctional mattress 100 is laid on, for example, the bottom 202 of a bed 200. The bed 200 has a back bottom 202a that can be raised or lowered. The multifunctional mattress 100 is formed to correspond to the size of the bottom 202. The multifunctional mattress 100 is also bendable in response to the raising or lowering of the back bottom 202a. The multifunctional mattress 100 is also deformable into a flat mattress shape 101 and an armrest mattress shape 102.

[0106] The multifunctional mattress 100 has a central portion 104 that supports the body, and a side portion 105 located on at least one side of the short side of the central portion 104. The central portion 104 is located in the center in the short side direction and extends in the longitudinal direction. The side portion 105 is a portion that extends along the central portion 104 in the longitudinal direction. A part of the side portion 105 can be bent separately from the central portion 104 by the cut portion 22.

[0107] The central portion 104 is bendable in response to the raising and lowering of the back bottom 202a. The side portions 105 are divided into three or more portions in the longitudinal direction by valley folds 24 as bending portions. The side portions 105 form the armrests and legs in the case of the armrest mattress shape 102. In the armrest mattress shape 102, the armrests and legs are formed by bending only the side portions 105 at the cut portions 22 between the central portion 104 and the side portions 105.

[0108] The central portion 104 is a portion that supports the body of a user lying on the multifunctional mattress 100. The central portion 104 has a first region 111 located on one side in the longitudinal direction (the left side in FIG. 23) and a second region 112 adjacent to the other side of the first region 111.

[0109] The length dimension in the short side direction of the first region 111 is smaller than the length dimension in the short side direction of the second region 112. The central portion 104 is formed in a convex shape protruding toward one side by the first region 111 and the second region 112. The first region 111 is located on the head side of a user lying on the multifunctional mattress 100. In other words, the first region 111 is a portion supported by the back bottom 202a of the bed 200.

[0110] The third region 113 is located on one side of the multifunctional mattress 100, and is provided on both sides in the short direction of the first region 111. The third region 113 is a portion that becomes a leg portion in the case of the armrest mattress shape 102.

[0111] The fourth region 114 is adjacent to the other side in the longitudinal direction of the third region 113. The other side in the longitudinal direction of the fourth region 114 is adjacent to the second region 112. The fourth region 114 is a portion that becomes an armrest in the case of the armrest mattress shape 102.

[0112] Next, the case where the flat mattress shape 101 is transformed into the armrest mattress shape 102 will be described.

[0113] As shown in Fig. 29, when the back bottom 202a of the bed 200 is raised, the central portion 104 of the multifunctional mattress 100 is bent. In this state, the fourth region 114 is valley-folded relative to the second region 112, and the third region 113 is valley-folded relative to the fourth region 114. This allows the mattress to be transformed from the flat mattress shape 101 to the armrest mattress shape 102. A fixing member (not shown) such as a hook-and-loop fastener may be provided between the third region 113 and the second region 112.

[0114] Thus, the multifunctional mattress 100 according to the fifth embodiment can form an armrest when the back bottom 202a of the bed 200 is raised. This allows a user on the bed 200 to take a comfortable posture when the back bottom 202a is raised.

[0115] In the above-mentioned fifth embodiment, an example has been described in which the multifunction mattress 100 is laid on the bed 200. However, the aspect of this embodiment is not limited to this, and for example, the multifunction mattress 10 according to the first embodiment or the multifunction mattress 70 according to the third embodiment may be laid on the bed 200.

[0116] In the above-mentioned fifth embodiment, an example was described in which side portions 105 forming armrests are provided on both short sides of the multifunctional mattress 100. However, the aspect of this embodiment is not limited to this, and for example, a side portion forming an armrest may be provided on only one of the short sides of the multifunctional mattress 100.

[0117] FIG. 30 is a plan view of the mattress shape of the multifunction mattress according to the fourth modified example, seen from above. The multifunctional mattress 120 according to the fourth modification is a modification of the multifunctional mattress 100 according to the fifth embodiment. In the multifunctional mattress 100, the third region 113 as the leg portion is one region. However, as in the fourth modification shown in FIG. 30, the third region 113 may have multiple bendable regions (for example, the first region 113a and the second region 113b). By having the third region 113 have multiple regions, the angle and height of the fourth region 114 can be set. The number of regions of the third region 113 is set by experiments and simulations, taking into consideration the comfort of the user when the back bottom 202a is raised.

[0118] FIG. 31 is a plan view of the mattress shape of the multifunction mattress according to the fifth modified example, seen from above. The multifunctional mattress 125 according to the fifth modification is a modification of the multifunctional mattress 100 according to the fifth embodiment. In the multifunctional mattress 100, the third region 113 and the fourth region 114 constituting the leg portion and the armrest are adjacent to each other in the longitudinal direction of the side portion 105. However, as in the fifth modification shown in FIG. 31, the first region 126 and the second region 128 constituting the leg portion and the armrest may be spaced apart in the longitudinal direction. In the multifunctional mattress 125, the second region 128 is folded in a valley to form the leg portion, and the first region 126 is folded in a valley to be placed on the second region 128, so that the first region 126 can be used as an armrest.

[0119] Next, a multifunctional mattress 130 according to a sixth embodiment will be described with reference to Figures 32 and 33. In the sixth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 32 is a plan view showing the mattress shape of the multifunction mattress according to the sixth embodiment. Fig. 33(a) is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape, and Fig. 33(b) is a perspective view showing the sofa shape.

[0120] In the multifunctional mattress 130 according to the sixth embodiment, the height to the seat surface in the case of a sofa shape 132 corresponds to the thickness (one layer) of the multifunctional mattress 130. The mattress shape 131 shown in FIG. 32 has only the first region 31 to the fourth region 34 of the multifunctional mattress 15 according to the first modified example shown in FIG.

[0121] As shown in Fig. 32, the side portion 26 of the multifunctional mattress 130 is divided into three by the mountain fold portion 23 and the valley fold portion 24. As shown in Fig. 33(b), when the mattress is in a sofa shape 132, the height from the floor surface to the armrest is three times the thickness of the multifunctional mattress 130 (three layers). In this case, the height from the seat surface to the armrest is twice the thickness of the multifunctional mattress 130 (two layers).

[0122] The multifunctional mattress 130 according to the sixth embodiment configured in this way can also be easily transformed from the mattress shape 131 into a sofa shape 132 having armrests. Furthermore, the armrests can improve the sitting comfort of the user.

[0123] Next, a multifunctional mattress 140 according to a seventh embodiment will be described with reference to Figures 34 and 35. In the seventh embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 34 is a plan view showing the mattress shape of the multifunction mattress according to the seventh embodiment. Figure 35(a) is an explanatory diagram showing a state in the middle of transforming from a mattress shape to a sofa shape, and Figure 35(b) is a perspective view showing the sofa shape.

[0124] The multifunctional mattress 140 according to the seventh embodiment has a fifth region 145 adjacent to the fourth region 34 of the multifunctional mattress 130 according to the sixth embodiment when in the mattress shape 141. A mountain fold 23 is formed between the fourth region 34 and the fifth region 145. The height to the seat surface of the multifunctional mattress 140 according to the seventh embodiment in the sofa shape 142 is twice the thickness of the multifunctional mattress 140 (two layers).

[0125] As shown in Fig. 34, the side portion 26 of the multifunctional mattress 140 is divided into four by the mountain fold portion 23 and the valley fold portion 24. As shown in Fig. 35(b), when the mattress is in a sofa shape 142, the height from the floor surface to the armrest is four times the thickness of the multifunctional mattress 140 (four layers). In this case, the height from the seat surface to the armrest is twice the thickness of the multifunctional mattress 140 (two layers).

[0126] The multifunctional mattress 140 according to the seventh embodiment configured in this way can also be easily transformed from the mattress shape 141 into a sofa shape 142 having armrests. Furthermore, the armrests can improve the sitting comfort of the user.

[0127] In the above-mentioned first embodiment, the height to the seat surface in the sofa shape 13 is three times the thickness T of the multifunctional mattress 10 (three layers) as an example. However, the present invention is not limited to this, and for example, the height to the seat surface in the sofa shape may be three times or more the thickness of the multifunctional mattress. This also applies to the second and third embodiments.

[0128] In the above-mentioned first embodiment, the height to the armrest in the first sofa shape 13a is five times (five layers) the thickness T of the multifunctional mattress 10. However, the present invention is not limited to this, and for example, the height to the armrest in the sofa shape may be five times or more the thickness of the multifunctional mattress. This also applies to the second and third embodiments.

[0129] As a multi-functional mattress based on the embodiment described above, for example, the following aspects are conceivable.

[0130] The first aspect is a multifunctional mattress that can be transformed into a mattress shape and a sofa shape with armrests, and has a central portion that supports the body and side portions located on both sides of the short side of the central portion, the side portions being divided into three or more portions in the longitudinal direction by bending portions, and the sofa shape forms the armrests by bending the side portions without separating them from the mattress shape.

[0131] The second aspect is the first aspect, wherein the central portion is divided into four or more portions in the longitudinal direction by bending portions, and the height dimension from the floor surface to the seat surface of the sofa shape is three or more times the thickness dimension of the mattress shape.

[0132] The third aspect is the first or second aspect, wherein the sofa shape has a support surface that is placed on the floor surface and forms the underside of the mattress shape, and the exposed surface in the vertical direction forms the front surface of the mattress shape.

[0133] The fourth aspect is any one of the first to third aspects, wherein the sofa shape has a space formed below the armrest, and by storing a portion of the side portion in the space, the sofa shape can be transformed into a sofa shape without the armrest.

[0134] The fifth aspect is a multi-functional mattress that can be transformed into a flat mattress shape and an armrest mattress shape having armrests, and has a central portion that supports the body and a side portion located on at least one of the short sides of the central portion, the side portion being divided into three or more portions in the longitudinal direction by bending portions, and the armrest mattress shape is formed by bending only the side portions at cut portions between the central portion and the side portions.

[0135] A sixth aspect is any one of the first to fifth aspects, wherein a cotton material made of polyester fiber is provided inside the central portion and the side portions.

[0136] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0137] 10, 15, 50, 55, 70, 75, 90, 130, 140 Multifunctional Mattress 10a surface 10b back side 11, 16, 51, 56, 71, 76, 91, 131, 141 Mattress shape 13, 17, 52, 57, 72, 77, 132, 142 Sofa Shape 13a, 52a, 72a, 92a 1st sofa shape 13b, 52b, 72b, 92b 2nd sofa shape 20 Cover 22 Cutting section 23 Mountain Fold 24 Tanioribu 25 Central part 26 Side 40, 40a~40d Cushioning material 100, 120, 125 Multifunctional Mattress 101 Flat mattress shape 102 Armrest mattress shape 104 Central part 105 Side 200 beds 202 Bottom 202a Back Bottom S1, S2, S3 space

Claims

1. A multi-function mattress that can be transformed into a first shape and a second shape having armrests, The seat has a central portion that can be bent in response to standing up and falling down and supports the body, and side portions located on both sides of the central portion in a short direction, The side portion is divided into three or more portions in the longitudinal direction by a bending portion, This multi-functional mattress is characterized in that when the multi-functional mattress is placed on a bed with a backrest, and when the backrest of the bed is raised, the mattress can be converted into the second shape forming the armrest by bending the side portions without separating the mattress from the first shape.

2. A longitudinal cut is provided in a portion of the side portion, 2. The multi-functional mattress of claim 1, wherein said side sections are bendable separately from said central section.

3. The side portion includes a first region and a second region, the first region is closer to an end in the longitudinal direction than the second region, 3. The multi-functional mattress of claim 1 or 2, wherein in said second shape, said first region defines a foot portion of said armrest.

4. 4. The multi-functional mattress according to claim 1, wherein the inside of the central portion and the side portions is provided with a cotton material made of polyester fiber.

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