JP7212469B2 - mattress - Google Patents

Description

The present invention relates to mattresses.

2. Description of the Related Art There are variable beds for nursing care and medical use that assist users in movement and posture maintenance, such as raising the upper body by raising the back corresponding part or raising the knee by raising the knee corresponding part. Such a bed uses a mattress that can be deformed according to changes in posture of each part (see, for example, Patent Document 1).

JP-A-2004-49414

The above-mentioned adjustable bed not only raises the part corresponding to the back starting from the part corresponding to the waist, but also raises both sides of the part corresponding to the back further to keep the shoulders from moving sideways. There are things that can help. For this reason, there is a demand for a mattress that is configured to be more flexible so as to follow the shape of the variable bed.

SUMMARY OF THE INVENTION In view of the above-mentioned problems associated with the conventional technology, the present invention has been proposed to preferably solve them, and an object of the present invention is to provide a flexible mattress.

In order to overcome the above problems and achieve the intended purpose, the mattress of the present invention is
A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first protrusion has a support surface that receives the user's body and has an inclined surface that slopes in the direction opposite to the other surface as it goes from the outer edge of the first protrusion facing the first groove toward the central portion. is formed by
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. The gist is that it is set wider than the interval between the first convex portions adjacent to each other in the longitudinal direction.

According to the mattress according to the present invention, it is easy to bend following the shape change of the convertible bed.

1 is a front perspective view of a mattress according to a preferred embodiment of the present invention; FIG. It is a surface view which shows the mattress of an Example. It is a back view which shows the mattress of an Example. It is the horizontal side view which looked at the mattress of the Example from the lateral side. It is the vertical side view which looked at the mattress of the Example from the vertical side. It is an enlarged cross-sectional view of the mattress of the embodiment as seen from the lateral side. It is the enlarged sectional view which looked at the mattress of the Example from the longitudinal side. It is a horizontal side view which shows the state which bent the mattress of an Example. It is a longitudinal side view showing a bent state of the mattress of the example. It is an explanatory view of the relationship of the first protrusions viewed from the lateral side, (a) is the relationship of the first protrusions adjacent to each other in the vertical direction in the front zone B1, and (b) is the relationship in the vertical direction in the front zone A1. (c) shows the relationship between adjacent first convex portions in the vertical direction at the boundary between the front zone A1 and the front zone B1. It is an explanatory view of the relationship of the second protrusions viewed from the lateral side, (a) is the relationship of the second protrusions adjacent to each other in the vertical direction in the back zone B2, and (b) is the relationship in the vertical direction in the back zone A2. (c) shows the relationship between the vertically adjacent second convex portions at the boundary between the back zone A2 and the back zone B2. It is a perspective view which expands and shows the 1st convex part of an Example.

Next, preferred embodiments of the mattress according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the mattress 10 is a plate-like body formed in a rectangular shape, and is mainly used by the user lying down in the longitudinal direction. The mattress 10 is made of elastically deformable soft foam. In some embodiments, a single piece of soft foam integrally forms each portion of mattress 10 . Polyurethane foam or the like can be used as the flexible foam. A soft foam suitable for the mattress 10 preferably has the following physical properties. In addition, the following physical properties are the values measured according to the JIS standard in parentheses.
・Density: 20 kg/m ³ to 70 kg/m ³ (JIS K 7222)
・25% hardness: 150N to 300N (JIS K 6400)
・Rebound resilience: 40% to 70% (JIS K 6400)
・Elongation: 50% to 200% (JIS K 6400)
Thus, soft foams that are relatively hard and have high impact resilience are suitable for the mattress 10 .

As shown in FIGS. 4 and 5, the mattress 10 includes a plurality of first projections 12 provided on one surface of the front and back of the mattress 10 (hereinafter referred to as the surface for convenience), and It has a plurality of second protrusions 14 provided on the other side of the front and back (hereinafter referred to as back for convenience), and a base 16 that supports the first protrusions 12 and the second protrusions 14 . The mattress 10 has a first convex portion 12 and a second convex portion 14 projecting in opposite directions from a base portion 16, and in the embodiment, the first convex portion 12, the second convex portion 14 and the base portion 16 are seamlessly integrated. is formed The mattress 10 is a reversible type that can be used with either side facing up. The first convex portion 12 and the second convex portion 14 are provided with base portions 12a and 14a connected to a base portion 16 that supports the convex portions 12 and 14, and provided in communication with the base portions 12a and 14a to provide a user's body with a comfortable fit. tips 12b, 14b forming support surfaces for receiving (see FIGS. 6, 7 and 12). The first convex portion 12 and the second convex portion 14 are configured such that the tip portions 12b and 14b and the root portions 12a and 14a are connected to the root portions 12a and 14a at the outer edges of the tip portions 12b and 14b in plan view. ing.

As shown in FIGS. 1 and 2, the plurality of first protrusions 12 are formed on the surface of the mattress 10 along the longitudinal (hereinafter referred to as vertical) direction and the lateral (hereinafter referred to as horizontal) direction of the mattress 10. are arranged in a grid pattern with the first groove portion 18 extending in the direction of the . Here, on the surface of the mattress 10, the first groove portion 18 extending linearly in the horizontal direction is referred to as the first horizontal groove portion 18A, and the first groove portion 18 extending linearly in the vertical direction is referred to as the first vertical groove portion 18A. It may be referred to as a groove portion 18B for distinction. A plurality of first protrusions 12 are regularly arranged vertically and horizontally on the surface of the mattress 10 . The first convex portion 12 is a portion that protrudes from the base portion 16 (the bottom of the first groove portion 18), and has a projection dimension from the base portion 16 (the bottom of the first groove portion 18 and the tip (pointing end) of the first convex portion 12). ) h1 are all set to be the same (see FIGS. 6 and 7). The surface of the mattress 10 receives the user's body by the supporting surfaces of the tips 12b of the plurality of first protrusions 12 (see FIGS. 4 and 5).

As shown in FIG. 3 , the plurality of second protrusions 14 extend along the longitudinal direction (the longitudinal direction of the mattress 10) and the lateral direction (the lateral direction of the mattress 10) on the back surface of the mattress 10. They are arranged in a grid with two grooves 20 interposed therebetween. Here, on the back surface of the mattress 10, the second groove portion 20 extending linearly in the horizontal direction is referred to as the second horizontal groove portion 20A, and the second groove portion 20 extending linearly in the vertical direction is referred to as the second vertical groove portion 20A. It may be referred to as a groove portion 20B for distinction. A plurality of second protrusions 14 are regularly arranged vertically and horizontally on the back surface of the mattress 10 . The second protrusion 14 is a portion that protrudes from the base 16 (the bottom of the second groove 20), and has a protrusion dimension from the base 16 (the bottom of the second groove 20 and the tip (pointing end) of the second protrusion 14). ) h2 are all set to be the same (see FIGS. 6 and 7). The mattress 10 can be used with the back surface facing up, and the back surface of the mattress 10 receives the user's body by the supporting surfaces of the distal ends 14b of the plurality of second projections 14.例文帳に追加In the embodiment, the projection dimension h1 of the first projection 12 from the base 16 and the projection dimension h2 of the second projection 14 from the base 16 are set to be the same (h1=h2).

As shown in FIGS. 2 to 4, each of the front and back surfaces of the mattress 10 is divided into zones A and B according to the area in the longitudinal direction of the mattress 10 (longitudinal direction of the mattress 10). Here, the mattress 10 is configured so that zone B has higher body pressure dispersion than zone A. As shown in FIG. As shown in FIG. 6, in the mattress 10, the longitudinal dimensions tb1 and tb2 of the projections 12 and 14 forming the zone B are different from the vertical dimensions ta1 and ta2 of the projections 12 and 14 forming the zone A. is also set small. As a result, the load is more finely supported in the zone B than in the zone A, so that the body pressure dispersibility of the zone B is enhanced. In the mattress 10, the interval between the longitudinally adjacent lateral grooves 18A, 20A in the zone B is narrower than the interval between the longitudinally adjacent lateral grooves 18A, 20A in the zone A.

When distinguishing between the front and back of the mattress 10, the front zone is referred to as front zone A1 and front zone B1, and the back zone is referred to as back zone A2 and back zone B2. It says. Specifically, the mattress 10 has zone B, zone A, zone B, zone A and zone B arranged alternately in the vertical direction on both sides thereof. Zone B constitutes a region corresponding to the head, buttocks, and feet from the ankle to the toes of the user lying on the mattress 10, and Zone A corresponds to the torso from the shoulders to the waist and from the crotch. Regions corresponding to the backs of the knees to the calves of the legs are constructed. The mattress 10 is provided with zones A and B in a symmetrical relationship with a zone B provided in the center in the longitudinal direction, and is symmetrical so that it can be used in any direction in the longitudinal direction toward the head. is configured to As described above, the mattress 10 has zones A and B with different body pressure dispersion properties depending on the part of the body to be supported on both the front and back sides, so that the user's body can be properly supported. It is possible to reduce the burden on the user. The first protrusions 12 forming the front zone A1 may be referred to as first protrusions 12ZA, and the first protrusions 12 forming the front zone B1 may be referred to as first protrusions 12ZB. Further, the second convex portion 14 forming the back zone A2 may be referred to as a second convex portion 14ZA, and the second convex portion 14 forming the back zone B2 may be referred to as a second convex portion 14ZB.

As shown in FIGS. 6 and 10, the first convex portion 12 is composed of a root portion 12a connected to the base portion 16 and a distal end portion 12b supported by the root portion 12a and constituting a protruding end of the first convex portion 12. It is The support surface of the tip portion 12b of the first convex portion 12 is formed from the longitudinal outer edge of the support surface facing the first horizontal groove portion 18A and the lateral outer edge of the support surface facing the first vertical groove portion 18B toward the central portion. It is formed in a tapered shape having an inclined surface that inclines toward the front side as it goes. The tip portion 12b of the first projection 12 of the embodiment has a tapered shape in which the support surface is inclined toward the back side as it goes from the central portion side of the tip portion 12b to the outer edge of the tip portion 12b in the vertical and horizontal directions. It has become. Thus, in this embodiment, the support surface that contacts the user at the tip 12b of the first protrusion 12 is generally inclined toward the base 16 from the center toward the outer edge of the support surface. The first convex portion 12 has a symmetrical shape with respect to a line passing through the longitudinal center of the first convex portion 12 in the front and back direction, and a line passing through the horizontal center of the first convex portion 12 in the front and back direction. It is formed in a symmetrical shape across the

As shown in FIGS. 6, 10 and 12, the first convex portion 12 has an outer edge of the support surface at the tip portion 12b that protrudes in the longitudinal direction (longitudinal direction of the mattress 10) from the root portion 12a. The root portion 12a is formed in a shape that is narrower than the tip portion 12b. The first convex portion 12 has a longitudinal cross-sectional shape that is narrower at the base portion 16 side than the tip portion 12b, with the root portion 12a being narrower than the tip portion 12b. ing. More specifically, in the vertical cross-sectional shape, the first convex portion 12 has the maximum width in the vertical direction between both outer edges of the tip portion 12b, and gradually widens in the vertical direction toward the tip side of the tip portion 12b. Width becomes narrower. The first convex portion 12 has a vertical width that gradually narrows from the outer edge of the tip portion 12b toward the base portion 16 of the root portion 12a, and reaches a minimum vertical width near the bottom side. . After that, the width in the vertical direction slightly increases just before reaching the base portion 16 due to the fact that the root portion 12a has a rounded constricted shape. In this way, the first convex portion 12 has a vertical cross-sectional shape in which the root portion 12a, which has the minimum width, is narrower than the tip portion 12b, which has the maximum width, and the base portion 16 side is constricted. ing.

As shown in FIGS. 6 and 7, the first convex portion 12 has a constricted root portion 12a in the longitudinal direction (longitudinal direction of the mattress 10), whereas it ), the root portion 12a is not constricted. That is, the lateral cross-sectional shape of the first convex portion 12 is such that the maximum width of the outer edge of the tip portion 12b (the distance between the outer edges of the tip portion 12b in the lateral direction) is the same as the width of the root portion 12a. In the embodiment, the first convex portion 12 has a side surface facing the vertical direction that changes its shape so that the curved surfaces are gently connected so that the tip portion 12b protrudes from the root portion 12a in an umbrella shape, and faces the horizontal direction. The side surface rises linearly from the root portion 12a to the outer edge of the tip portion 12b.

As shown in FIGS. 6 and 10, the horizontal first grooves 18A formed by the first projections 12, 12 adjacent in the longitudinal direction (longitudinal direction of the mattress 10) have tip portions 12b, 12b projecting toward each other. The bottom side sandwiched between the base portions 12a, 12a recessed from the tip portion 12b is formed wider than the opening side sandwiched between the outer edges of the tip portion 12b. The opening (groove width ma1, mb1, bm1) of the horizontal first groove portion 18A indicates the position where the outer edges of the facing tip portions 12b, 12b of the longitudinally adjacent first convex portions 12, 12 are closest to each other. . That is, the horizontal first groove portion 18A has a narrower portion on the opening side than the bottom side, and the bottom side is formed to be wider in the vertical direction than the opening side. As shown in FIG. 7, the first longitudinal groove portion 18B formed by the laterally adjacent first protrusions 12, 12 is formed between the root portions 12a, 12a from the opening side sandwiched between the outer edges of the tip portions 12b, 12b. It is basically formed with the same width toward the bottom side to be sandwiched. The first convex portion 12 is configured to be easily deformed in the vertical direction by the root portion 12a that is constricted in the vertical direction, but the root portion 12a is not constricted in the horizontal direction, or the constriction is small so that it is not deformed in the horizontal direction. difficultly constructed.

As shown in FIG. 6, the outer edge of the tip portion 12b of the first convex portion 12ZA forming the front zone A1 is positioned closer to the base portion 16 than the outer edge of the tip portion 12b of the first convex portion 12ZB forming the front zone B1. are doing. Further, the constriction of the first protrusions 12ZB forming the front zone B1 is formed to be larger in the projecting direction of the first protrusions 12 than the constriction of the first protrusions 12ZA forming the front zone A1. The constriction of the first protrusion 12ZB is shallower than the constriction of the first protrusion 12ZA, but is wider than the first protrusion 12ZA toward the longitudinal direction (longitudinal direction of the mattress 10). Therefore, of the first protrusions 12ZA and 12ZB that are vertically adjacent at the boundary between the front zone A1 and the front zone B1, the outer edge of the tip 12b of the first protrusion 12ZA that constitutes the front zone A1 is the front zone B1. is located on the back side of the outer edge of the tip portion 12b of the first convex portion 12ZB that constitutes the . In addition, among the vertically adjacent first convex portions 12ZA and 12ZB at the boundary between the front zone A1 and the front zone B1, the first convex portion of the front zone B1 is located closer to the first convex portion 12ZA of the front zone A1 than the constriction of the first convex portion 12ZA of the front zone A1. A constriction of 12ZB is formed largely in the projecting direction of the first protrusion 12 . In other words, the first protrusions 12ZA and 12ZB that are vertically adjacent to each other at the boundary are such that the outer edge that protrudes most in the vertical direction at the tip 12b of one of the first protrusions 12ZA is the constriction of the other first protrusion 12ZB. They have a face-to-face relationship.

As shown in FIG. 6, the first convex portion 12ZB of the front zone B1 is larger than the first convex portion 12ZA of the front zone A1 from the base portion 16 to the outer edge of the tip portion 12b (the portion that protrudes most in the vertical direction). They are spaced apart and the distance from the base 16 to the outer edge of the tip 12b is increased. The first protrusion 12ZB of the front zone B1 has a larger opening between the base 16 and the outer edge of the tip 12b than the first protrusion 12ZA of the front zone A1. The first convex portion 12ZA of the front zone A1 is deeper than the first convex portion 12ZB of the front zone B1 in the depth of the constriction of the root portion 12a that opens from the outer edge of the tip portion 12b to the base portion 16 side (vertical direction at the tip portion 12b). The dimensional difference between the dimension ta1, tb1 between both outer edges of the root portion 12a and the minimum width in the vertical direction of the root portion 12a) is large.

As shown in FIGS. 6, 7 and 11, the second convex portion 14 has a root portion 14a connected to the base portion 16, and a tip portion 14b supported by the root portion 14a and forming a tip of the second convex portion 14. It consists of As shown in FIG. 7, the support surface of the tip portion 14b of the second convex portion 14 extends from the outer edge of the support surface in the horizontal direction (transverse direction of the mattress 10) facing the second vertical groove portion 20B toward the central portion. It is formed in a tapered shape having an inclined surface that inclines toward the back side as it goes. Specifically, the distal end portion 14b of the second protrusion 14 has a cross-sectional shape in the vertical direction (longitudinal direction of the mattress 10), except for the narrow tapered portion of the outer edge of the distal end portion 14b, and the central portion extends horizontally. (See Figure 6). The tip portion 14b of the second convex portion 14 is inclined toward the front side (base portion 16 side) from the central portion side of the tip portion 14b toward the outer edge of the tip portion 14b in the lateral direction. In the embodiment, the support surface that contacts the user at the tip 14b of the second projection 14 is inclined toward the base 16 from the center of the support surface toward the outer edge in the horizontal direction. has a shape extending horizontally. The tip portion 14b of the second convex portion 14 has a support surface that is substantially flat in the vertical cross section, but tapered in the horizontal cross section. The second convex portion 14 has a symmetrical shape with respect to a line passing through the longitudinal center of the second convex portion 14 in the front and back direction, and a line passing through the horizontal center of the second convex portion 14 in the front and back direction. It is formed in a symmetrical shape across the

As shown in FIGS. 6 and 11, the second convex portion 14 has the outer edge of the support surface at the tip portion 14b that protrudes in the longitudinal direction (longitudinal direction of the mattress 10) from the root portion 14a so that the tip portion 14b extends in the longitudinal direction. The root portion 14a is formed in a shape that is narrower than that of the base portion 14a. The second convex portion 14 has a vertical cross-sectional shape that is narrower at the root portion 14a than at the tip portion 14b and constricted on the base portion 16 side, and has a so-called mushroom shape when viewed from the side. ing. More specifically, the second convex portion 14 has the maximum vertical width between both outer edges of the tip portion 14b in the vertical cross-sectional shape. The second convex portion 14 gradually narrows in vertical width from the outer edge of the tip portion 14b toward the base portion 16 of the root portion 14a, and reaches the minimum vertical width near the bottom side. . After that, the width in the vertical direction slightly increases just before reaching the base portion 16 due to the fact that the root portion 14a has a rounded constricted shape. In this way, the second convex portion 14 is formed in a vertical cross-sectional shape in which the root portion 14a having the minimum width is narrower than the tip portion 14b having the maximum width, and the base portion 16 side is constricted. ing.

As shown in FIGS. 6 and 7, the second convex portion 14 has a constricted root portion 14a in the longitudinal direction (longitudinal direction of the mattress 10), whereas it ), the root portion 14a is not constricted. That is, the second convex portion 14 has a lateral cross-sectional shape in which the maximum width between the outer edges of the tip portion 14b (the distance between the outer edges of the tip portion 14b in the lateral direction) is the same as the width of the root portion 14a. In the embodiment, the second convex portion 14 has a side surface facing the vertical direction that changes its shape so that the curved surfaces are gently connected so that the tip portion 14b protrudes in an umbrella shape from the root portion 14a, and faces the horizontal direction. The side surface rises linearly from the root portion 14a to the outer edge of the tip portion 14b.

As shown in FIGS. 6 and 11, the lateral second groove 20A formed by the second protrusions 14, 14 adjacent in the longitudinal direction (longitudinal direction of the mattress 10) has tip portions 14b, 14b projecting toward each other. The bottom side sandwiched between the base portions 14a, 14a recessed from the tip portion 14b is wider than the opening side sandwiched between the outer edges of the base portion 14b. The openings (groove widths ma2, mb2, bm2) of the lateral second groove portion 20A refer to the positions where the outer edges of the facing tip portions 14b, 14b of the longitudinally adjacent second convex portions 14, 14 are closest to each other. . That is, the second horizontal groove portion 20A has a narrower portion on the opening side than the bottom side, and the bottom side is wider in the vertical direction than the opening side. As shown in FIG. 7, the second longitudinal groove 20B formed by the laterally adjacent second protrusions 14, 14 is formed between the root portions 14a, 14a from the opening side sandwiched between the outer edges of the tip portions 14b, 14b. It is basically formed with the same width toward the bottom side to be sandwiched. The second convex portion 14 is configured to be easily deformed in the vertical direction by the root portion 14a constricted in the vertical direction, but the root portion 14a is not constricted in the horizontal direction, or the constriction is small, so that it is not deformed in the horizontal direction. difficultly constructed.

As shown in FIG. 6, the front end portion 12b of the first protrusion 12 has a bulging central portion in the longitudinal direction (longitudinal direction of the mattress 10), whereas the front end portion 14b of the second protrusion 14 is flattened centrally in the longitudinal direction. Further, the distal end portion 12b of the first protrusion 12 and the distal end portion 14b of the second protrusion 14 have a common shape in which the central portion swells in the lateral direction (transverse direction of the mattress 10). The second convex portion 14 has a vertical inclined surface range formed on the distal end portion 14b set narrower than the vertical inclined surface range formed on the distal end portion 12b of the first convex portion 12. . In this way, the mattress 10 has the front surface first projections 12 tapered more than the back surface second projections 14, thereby improving body pressure dispersibility on the front surface more than on the back surface. In addition, since the longitudinal inclination of the second protrusions 14 of the mattress 10 is narrower than the longitudinal inclination of the first protrusions 12, the back side of the mattress 10 can be made more difficult for the user to shift in the longitudinal direction than the front side. Therefore, the mattress 10 is preferably used for relatively long periods of sleep on the front side, and is preferably used on the back side for relatively active periods, such as during recovery.

As shown in FIG. 6, the vertical dimension ta1 of the first protrusions 12 (referred to as first protrusions 12ZA when distinguished) forming the front zone A1 is equal to that of the first protrusions forming the front zone B1. 12 (referred to as a first projection 12ZB when distinguished) is set larger than the vertical dimension tb1 (ta1>tb1). Similarly, the vertical dimension ta2 of the second protrusions 14 (referred to as second protrusions 14ZA when distinguished) forming the back zone A2 is the same as the second protrusions 14 (distinguished) forming the back zone B2. is set larger than the vertical dimension tb2 of the second protrusion 14ZB (ta2>tb2). As shown in FIG. 7, the first protrusions 12ZA forming the front zone A1 and the first protrusions 12ZB forming the front zone B1 have the same horizontal dimension y1. Similarly, the second protrusions 14ZA forming the back zone A2 and the second protrusions 14ZB forming the back zone B2 have the same horizontal dimension y2. In the mattress 10, the projections 12ZA (14ZA) in zone A are larger in vertical dimension than the projections 12ZB (14ZB) in zone B on both front and back surfaces (ta1>tb1, ta2>tb2), The lateral dimensions y1 and y2 of the protrusions 12 and 14 do not change depending on the zone (zone A or zone B). In this way, in zone B, the projections 12 and 14 having longitudinally smaller dimensions than zone A are arranged more densely in the longitudinal direction than zone A, and zone B has more projections than zone A. The portions 12 and 14 are configured to support the load. Since the mattress 10 receives a load from relatively many protrusions 12 and 14 in the zone B, the body pressure dispersibility in the zone B is good, and the load is received by the relatively large protrusions 12 and 14 in the zone A. to properly hold the load. The vertical dimensions ta1, tb1, ta2, and tb2 of the projections 12 and 14 refer to the widths between the outer edges of the tips 12b and 14b in the vertical direction, and the horizontal dimensions y1, tb2 of the projections 12 and 14. y2 is the width between the outer edges of the tips 12b and 14b in the lateral direction.

As shown in FIG. 6, the first protrusions 12ZA forming the front zone A1 are arranged in the longitudinal direction between the tip portion 12b and the base portion 12a (the longitudinal direction of the mattress 10) more than the first protrusions 12ZB forming the front zone B1. direction) is set large. That is, the first convex portion 12ZA of the front zone A1 has a deeper constriction on the root side than the first convex portion 12ZB of the front zone B1. As a result, the surface of the mattress 10 is more difficult to deform in the longitudinal direction in the front zone B1 than in the front zone A1. As shown in FIG. 6, the second protrusions 14ZA forming the rear zone A2 and the second protrusions 14ZB forming the rear zone B2 have the same vertical dimension difference between the tip portion 14b and the root portion 14a. is. That is, the second convex portion 14ZA of the back zone A2 and the second convex portion 14ZB of the back zone B2 have the same constriction depth on the root side. Therefore, on the back surface of the mattress 10, there is no difference in the ease of vertical deformation of the back zones A2 and B2 due to the difference in the depth of the constriction of the second projections 14. FIG.

As shown in FIG. 6, the mattress 10 has an interval ma1 between the first projections 12ZA, 12ZA adjacent to each other in the longitudinal direction (longitudinal direction of the mattress 10) in the front zone A1 of the surface. It is set wider than the interval mb1 between the adjacent first protrusions 12ZB, 12ZB (ma1>mb1). Further, in the mattress 10, the interval bm1 between the vertically adjacent first convex portions 12ZA and 12ZB at the boundary between the front zone A1 and the front zone B1 on the surface is equal to that of the vertically adjacent first convex portions 12ZB in the front zone B1. , mb1 of 12ZB (bm1>mb1). As shown in FIG. 7, the mattress 10 has the same interval n1 between the first protrusions 12, 12 adjacent to each other in the lateral direction (transverse direction of the mattress 10) on the surface. On the surface of the mattress 10, the groove width ma1 of the horizontal first groove portion 18A in the front zone A1 is larger than the groove width mb1 of the horizontal first groove portion 18A in the front zone B1. Also, on the surface of the mattress 10, the groove width bm1 of the first horizontal groove 18A at the boundary between the front zone A1 and the front zone B1 is larger than the groove width mb1 of the first horizontal groove 18A in the front zone B1. In the embodiment, the interval ma1 between the vertically adjacent first convex portions 12ZA and 12ZA in the front zone A1 and the interval bm1 between the vertically adjacent first convex portions 12ZA and 12ZB at the boundary are the same (ma1 = bm1). The surface of the mattress 10 has the same groove width n1 of the vertical first grooves 18B. In the embodiment, the interval ma1 between the longitudinally adjacent first protrusions 12ZA and 12ZA in the front zone A1 and the interval bm1 between the longitudinally adjacent first protrusions 12ZA and 12ZB at the border are the laterally adjacent first protrusions 12ZA and 12ZB. It is wider than the interval n1 between the 1 convex portions 12, 12 (ma1=bm1>n1). In the front zone B1, the interval mb1 between the longitudinally adjacent first convex portions 12ZB, 12ZB and the interval n1 between the laterally adjacent first convex portions 12, 12 are set to be the same (mb1=n1). .

As shown in FIG. 6, the mattress 10 has an interval ma2 between the second protrusions 14ZA, 14ZA adjacent to each other in the longitudinal direction (longitudinal direction of the mattress 10) in the back zone A2 of the back surface, and the longitudinal direction in the back zone B2 of the back surface. The interval mb2 between the adjacent second protrusions 14ZB, 14ZB is set to be the same (ma2=mb2). Similarly, in the mattress 10, the interval bm2 between the second projections 14ZA and 14ZB that are longitudinally adjacent to each other at the boundary between the back zone A2 and the back zone B2 of the back surface is vertically adjacent in the back zone A2 and the back zone B2. It is the same as the interval ma2, mb2 between the second convex portions 14,14. Further, the mattress 10 has the same interval n2 between the second protrusions 14, 14 adjacent to each other in the lateral direction (transverse direction of the mattress 10) on the back surface. Thus, on the back surface of the mattress 10, the groove widths ma2, mb2, and bm2 of the lateral second grooves 20A are all the same regardless of the back zone A2 and the back zone B2, and the groove widths of the longitudinal second grooves 20B are the same. All n2 are the same. In the embodiment, on the back surface of the mattress 10, the intervals ma2, mb2, bm2 between the vertically adjacent second convex portions 14, 14 are set wider than the interval n2 between the laterally adjacent second convex portions 14, 14. (ma2=mb2=bm2>n2). The intervals ma1, mb1, bm1, n1, ma2, mb2, bm2, n2 between the adjacent protrusions 12, 12, 14, 14 (groove widths of the grooves 18, 20) are , 14b.

As shown in FIG. 4, in the mattress 10, the front zone A1 on the front surface and the back zone A2 on the back surface are at least partially overlapped on the front and back sides with the base 16 interposed therebetween, and the front zone B1 on the front surface and the back zone B2 on the back surface are They are arranged so that at least a part of them overlaps on the front and back with the base 16 interposed therebetween. In the embodiment, on the front and back sides sandwiching the base 16, the corresponding front zone A1 and back zone A2 have different longitudinal ranges (longitudinal direction of the mattress 10), and the corresponding front zone B1 and back zone B2 have different longitudinal ranges. They have different ranges. In the mattress 10, the first horizontal groove portion 18A and the second horizontal groove portion 20A are arranged so as to overlap each other on the front and back, or are arranged to be shifted in the vertical direction, and have an irregular relationship. and the second protrusion 14 are displaced in the vertical direction. As shown in FIG. 5, in the mattress 10, the longitudinal first groove portion 18B and the longitudinal second groove portion 20B are arranged with being shifted in the lateral direction (transverse direction of the mattress 10). Vertical grooves 20B, 18B on the other surface of the mattress 10 are arranged corresponding to the lateral centers of the protrusions 12, 14. As shown in FIG. That is, the mattress 10 is arranged such that the first protrusion 12 and the second protrusion 14 are shifted in the lateral direction with the base 16 interposed therebetween and are partially overlapped. are arranged with the base 16 interposed therebetween so as not to overlap each other.

As shown in FIG. 5, in a plurality of longitudinal second grooves 20B extending in the longitudinal direction (the longitudinal direction of the mattress 10), provided at positions corresponding to the first protrusions 12, the first protrusions There is a deep longitudinal second groove portion 20Ba formed to reach the inner side of the portion 12 . The mattress 10 is provided with deep vertical second grooves 20Ba at a total of three locations: the central portion in the lateral direction (transverse direction of the mattress 10) and the left and right side portions corresponding to the shoulders of the user. there is The deep longitudinal second groove portion 20Ba is formed with a depth of 70% to 80% of the thickness of the mattress 10 (the distance between the tip of the first convex portion 12 and the tip of the second convex portion 14), and the remaining soft By reducing the thickness of the foam, the mattress 10 can be easily bent in the lateral direction. In addition, in an Example, the normal 2nd groove part 20 and the 1st groove part 18 other than deep longitudinal 2nd groove part 20Ba are 50% or less of the depth of the thickness of the mattress 10. FIG.

As shown in FIG. 6, the distance between the first protrusions 12, 12 adjacent in the longitudinal direction (longitudinal direction of the mattress 10) in the front zone A1 or the boundary between the front zones A1, B1 is the back zone A2 and the back zone B2. is set wider than the interval between the second convex portions 14, 14 adjacent to each other in the vertical direction. The interval between the vertically adjacent first projections 12ZB, 12ZB in the front zone B1 is set narrower than the interval between the vertically adjacent second projections 14, 14 in the back zone A2 and the back zone B2.

As shown in FIG. 4, the mattress 10 corresponds to the front zone A1 and the back zone A2 corresponding to the front zone A1, and the front zone B1 and the front zone B1 according to the area in the longitudinal direction (longitudinal direction of the mattress 10). and a back zone B2. The second convex portion 14 is set to have a longitudinal dimension larger than that of the first convex portion 12 in the relationship between the corresponding zones A and B. As shown in FIG. Specifically, the second protrusions 14ZA of the back zone A2 are formed to have larger dimensions in the vertical direction than the corresponding first protrusions 12ZA of the front zone A1 with the base 16 sandwiched between the front and back. In addition, the second convex portion 14ZB of the back zone B2 is formed to have a larger size in the vertical direction than the corresponding first convex portion 12ZB of the front zone B1 with the base portion 16 sandwiched between the front and back.

As shown in FIGS. 1-5, the mattress 10 comprises support sections 22, 24 arranged encircling Zone A and Zone B, which have a higher load bearing capacity than Zone A and Zone B. A defined support zone is provided. The front and back surfaces of the mattress 10 have both lateral edges (edges along the longitudinal direction (longitudinal direction of the mattress 10)) laterally sandwiching Zone A or Zone B, and both lateral edges sandwiching Zone A and Zone B longitudinally. Support zones are provided along the longitudinal edges of the mattress 10 (edges along the transverse direction (short direction of the mattress 10)). The front support portion 22 provided on the lateral edge of the surface of the mattress 10 has the same longitudinal dimension as the laterally aligned first protrusions 12, but has a lateral dimension greater than that of the first protrusions 12. is largely formed. A horizontal first groove portion 18A is provided between the front support portions 22, 22 adjacent in the longitudinal direction, and the shape of the front support portion 22 provided on the lateral edge of the mattress 10 when viewed from the side is the same as that of the laterally adjacent first groove portions. It is the same as the 1 convex portion 12 . The front support portion 22 provided on the vertical edge has the same horizontal dimension as the first projections 12 arranged in the vertical direction, but is formed to have a greater vertical dimension than the first projections 12. there is Between the laterally adjacent front support portions 22, 22, there is a vertical first groove portion 18B, and the front support portion 22 provided at the longitudinal edge of the mattress 10 has a shape seen from the vertical direction that is vertically adjacent to the first vertical groove portion 18B. It is the same as the 1 convex portion 12 .

As shown in FIGS. 1 to 5, the back support portion 24 provided on the lateral edge of the back surface of the mattress 10 has the same longitudinal dimension as the second protrusions 14 arranged in the lateral direction, but the second protrusion 14 has the same longitudinal dimension. The horizontal dimension is formed to be larger than that of the two convex portions 14 . Between the back support portions 24, 24 adjacent in the longitudinal direction, there is a second horizontal groove portion 20A, and the back support portion 24 provided at the lateral edge of the mattress 10 has a shape as viewed from the side that is similar to that of the laterally adjacent back support portions 24,24. 2 It is the same as the convex portion 14 . The back support portion 24 provided on the vertical edge has the same horizontal dimension as the vertically aligned second projections 14, but is formed to have a greater vertical dimension than the second projections 14. there is Between the laterally adjacent back support portions 24, 24, there is a longitudinal second groove portion 20B, and the back support portion 24 provided on the longitudinal edge of the mattress 10 has a shape that is vertically adjacent to the longitudinally adjacent second groove portion 20B. 2 It is the same as the convex portion 14 . In this way, the mattress 10 has the support portions 22, 24 larger than the projections 12, 14 on the edges on both the front and back surfaces, so that the load bearing capacity at the edges is increased. there is Therefore, when the user sits on the edge of the mattress 10 or stands up from the mattress 10, the user's load is preferably supported so as not to sink excessively, and the user can sit or stand up. and so on. Moreover, when the user lies on the mattress 10, the relatively hard support portions 22, 24 can enhance holdability.

When the mattress 10 is bent in the longitudinal direction so that the surface becomes concave, the first protrusions 12, 12 adjacent in the longitudinal direction (longitudinal direction of the mattress 10) on the front side relatively approach each other, while on the back side the longitudinal direction When the adjacent second protrusions 14, 14 are relatively separated and the first protrusions 12, 12 come into contact with each other, bending deformation is prevented (see the dashed-dotted line in FIG. 10). On the contrary, when the mattress 10 is bent in the longitudinal direction so that the back surface becomes concave, the second protrusions 14, 14 adjacent in the longitudinal direction on the back side relatively approach each other, while the first protrusions 14, 14 adjacent in the longitudinal direction on the front side relatively approach each other. When the protrusions 12, 12 are relatively separated and the second protrusions 14, 14 come into contact with each other, the bending deformation is prevented (see the dashed line in FIG. 11). In this way, the mattress 10 can be easily bent in the vertical direction by the grooves 18A and 20A extending in the lateral direction (transverse direction of the mattress 10) on each of the front and back sides (see FIG. 8). The laterally extending grooves 18B and 20B facilitate lateral bending (see FIG. 9). Since the tip part 12b of the first convex part 12 of the mattress 10 has a tapered shape having an inclined surface from the outer edge facing the grooves 18A and 20A extending in the lateral direction toward the central part, the front side is concave. When it is bent in the vertical direction, the first projections 12, 12 arranged in the vertical direction are less likely to interfere with each other, so that it can be bent significantly in the vertical direction. Similarly, in the mattress 10, the tip 12b of the first protrusion 12 and the tip 14b of the second protrusion 14 slope from the outer edge facing the longitudinally extending grooves 18B and 20B toward the center. Since it has a tapered shape, when it is bent in the horizontal direction so that the front side or the back side becomes concave, the first convex portions 12, 12 or the second convex portions 14, 14 arranged in the horizontal direction are less likely to interfere with each other, It can be bent laterally.

The mattress 10 has an interval between the first protrusions 12ZA, 12ZA that are adjacent in the longitudinal direction (longitudinal direction of the mattress 10) in the front zone A1, and the first protrusions that are longitudinally adjacent at the boundary between the front zone A1 and the front zone B1. The interval between the portions 12ZA and 12ZB is wider than the interval between the vertically adjacent first convex portions 12ZB and 12ZB in the front zone B1. In the mattress 10, the longitudinal dimension of the first protrusions 12ZA in the front zone A1 is larger than that of the first protrusions 12ZB in the front zone B1, but since the first horizontal grooves 18A are wider in the front zone A1, the mattress in the front zone A1 10 can be made easier to bend in the vertical direction. In addition, since the boundary between the front zone A1 and the front zone B1 is often the starting point when the mattress 10 is bent in the vertical direction, if the horizontal first groove portion 18A extending to the boundary is wide, it corresponds to a variable bed. As a result, the mattress 10 becomes easier to bend in the vertical direction. In the front zone B1, the space between the vertically adjacent first protrusions 12ZB and 12ZB is narrower than in the front zone A1, but the lengthwise dimension of the first protrusions 12ZB is small and the pitch of the horizontal first grooves 18A is fine. Therefore, the easiness of bending in the vertical direction can be maintained even in the front zone B1.

In this way, according to the mattress 10, it can be bent and deformed appropriately following the movement of the variable bed, and can be bent corresponding to the variable bed tilted to become a backrest or deformed to lift the knees. It can easily follow bending at multiple points in the vertical direction, such as bending corresponding to the variable bed (see FIG. 8). In addition, the mattress 10 bends not only in the vertical direction (longitudinal direction of the mattress 10), but also in the lateral direction (the lateral direction of the mattress 10) corresponding to the adjustable bed tilted so as to support the shoulders from the lateral side. It is possible to follow the bending at a plurality of places without difficulty.

In the mattress 10, the first horizontal groove 18A and the second horizontal groove 20A extending in the horizontal direction (short direction of the mattress 10) are formed wider on the bottom side than on the opening side in the vertical direction (longitudinal direction of the mattress 10). As a result, it is possible to make the gaps between the convex portions 12, 12, 14, 14 adjacent to each other in the vertical direction relatively large while ensuring a load supporting surface. Thereby, the mattress 10 can be easily deformed in the longitudinal direction even when the mattress 10 is bent in either the front or the back direction in the longitudinal direction.

The outer edge of the support surface of the tip portion 12b of the first convex portion 12 protrudes in the longitudinal direction (longitudinal direction of the mattress 10) from the root portion 12a, and the longitudinal cross-sectional shape of the root portion 12a is larger than that of the tip portion 12b. It has a constricted shape that narrows. Of the first protrusions 12ZA and 12ZB that are vertically adjacent at the boundary between the front zone A1 and the front zone B1, the outer edge of the tip 12b of the first protrusion 12ZA forming the front zone A1 forms the front zone B1. The first projection 12ZB is located closer to the base 16 than the outer edge of the tip 12b. That is, the outer edge of the tip portion 12b of the first convex portion 12ZB forming the front zone B1 is farther from the base portion 16 than the outer edge of the tip portion 12b of the first convex portion 12ZA forming the front zone A1. As a result, the constriction of the base portion 12a formed between the outer edge of the first protrusion 12ZB and the base portion 16 forming the front zone B1 opens wide in the direction in which the first protrusion 12ZB protrudes. Thus, in the mattress 10, one of the first projections 12ZA, 12ZB adjacent to each other in the longitudinal direction (the longitudinal direction of the mattress 10) at the boundary between the front zones A1, B1 is closer to the base 16 than the other. The other one of the first protrusions 12ZA and 12ZB is formed so that the constriction opens wider in the projecting direction of the first protrusion 12 than the other one (see FIG. 10(c)). As a result, when the mattress 10 is bent so that the front side becomes concave at the boundary between the front zones A1 and B1, the tip portion 12b (especially near the outer edge) of the first convex portion 12ZA of the front zone A1 is located in the front zone B1. It enters into the constriction of the first convex portion ZB (see the one-dot chain line in FIG. 10(c)). Therefore, since the adjacent first protrusions 12ZA and 12ZB are unlikely to interfere at the boundary between the front zones A1 and B1, it is possible to greatly bend the mattress 10 at the boundary.

Since the mattress 10 has the deep longitudinal second groove portion 20Ba formed to reach the inside of the first convex portion 12 from the back surface, it is easy to bend from the bottom of the deep longitudinal second groove portion 20Ba as a starting point. . As a result, the mattress 10 can follow the lateral deformation of the adjustable bed, such as laterally supporting the shoulders, even in the short lateral direction (transverse direction of the mattress 10).

In the mattress 10, the first protrusions 12 and the second protrusions 14 have the same width at the outer edges of the tip portions 12b and 14b and the width of the root portions 12a and 14a in the lateral direction (transverse direction of the mattress 10). It is formed in a shape without constriction. That is, the first protrusions 12 and the second protrusions 14 are more difficult to deform in the lateral direction than in the longitudinal direction (vertical direction of the mattress 10), and hold the lateral movements of the user better. In the mattress 10, the first projections 12ZA forming the front zone A1 are set such that the vertical dimension difference between the tip end portion 12b and the root portion 12a is larger than that of the first projections 12ZB forming the front zone B1. there is Since the first convex portion 12ZB of the front zone B1 that supports a relatively large load such as the buttocks is not easily deformed in the vertical direction, the high load applied to the front zone B1 can be appropriately received with a good holding feeling. In this manner, the mattress 10 appropriately supports the load of the user by the shape and arrangement of the projections 12 and 14, and has a suitable holding property to help the user maintain his/her posture.

In the mattress 10, in the relationship between the zones A1, A2, B1, and B2 corresponding to each other on the front and back, the second protrusions 14 are larger than the first protrusions 12 in the longitudinal direction (longitudinal direction of the mattress 10). big. Specifically, the second protrusions 14ZA of the back zone A2 have a larger maximum dimension between the outer edges in the vertical direction than the first protrusions 12ZA of the front zone A1, and the back zone A2 is harder than the front zone A1. ing. Similarly, the second protrusions 14ZB of the back zone B2 have a larger maximum dimension between the longitudinal outer edges than the first protrusions 12ZB of the front zone B1, and the back zone B2 is harder than the front zone B1. . That is, the mattress 10 has the back surface harder than the front surface. Therefore, according to the mattress 10, the hardness can be easily changed by simply changing the front and back.

In the mattress 10, the range of the longitudinally inclined surface formed at the tip 14b of the second protrusion 14 is narrower than the range of the longitudinally sloped surface formed at the tip 12b of the first protrusion 12. is set. As a result, the second projections 14 on the back surface of the mattress 10 have a larger initial compressive stress than the first projections 12 on the front surface, and can appropriately receive the load. That is, the mattress 10 has the back surface harder than the front surface. Therefore, according to the mattress 10, the hardness can be easily changed by simply changing the front and back.

Users who receive nursing care may have weakened muscles, so they give up trying to stand up on their own, and fall into a vicious cycle of further weakening of muscles. It is a problem. Therefore, in recent years, the mattress 10 has been required to support and promote independence of the user, not limited to flexibility and body pressure dispersibility for comfortable use by the user, or ease of deformation corresponding to the adjustable bed. It is Since the surface of the mattress 10 is softer than the back surface, the mattress 10 can be used for a relatively long time without a burden. In addition, since the front surface of the mattress 10 is easier to deform than the rear surface, the mattress 10 can appropriately assist the user in maintaining posture when placed on the adjustable bed. On the other hand, since the back surface of the mattress 10 is harder than the front surface, when the mattress 10 is turned upside down and used with the back surface facing up, the user can easily stand up by himself or herself. It can assist movement. In this way, for example, when the condition is bad, the user can use the surface of the mattress 10 to reduce the burden on the user, and when the user recovers, the user can use the back surface of the mattress 10 with the second convex portion 14 facing upward. A single mattress 10 can efficiently contribute to a series of steps up to supporting the independence of the user.

(Change example)
The configuration is not limited to that described above, and may be modified as follows, for example.
(1) The protrusions in the examples have a shape in which the root portion is not constricted in the lateral direction (transverse direction of the mattress), but this is not restrictive, and the cross-sectional shape in the lateral direction is a mushroom shape constricted at the root portion. There may be. In this case, the protruding portion should be formed so that the depth of the constriction in the horizontal direction (the difference between the maximum width of the tip and the minimum width of the root) is smaller than the depth of the constriction in the vertical direction (longitudinal direction of the mattress). good. In other words, if the protrusion does not have a shape (example) in which there is no dimensional difference between the outer edge of the root portion and the tip portion in the horizontal direction, the dimensional difference between the outer edge of the root portion and the tip portion in the horizontal direction is It is preferable to form a shape smaller than the dimensional difference between the root portion and the outer edge of the tip portion.
(2) Either or both of the first protrusion and the second protrusion may be provided with a constricted shape at the root portion in the lateral direction (transverse direction of the mattress) of the protrusion.

The present disclosure includes the following inventions.
(Invention A)
Invention A is a mattress formed in a rectangular shape with elastically deformable soft foam,
a plurality of first protrusions provided on one of the front and back sides of the mattress;
a plurality of second protrusions provided on the other side of the front and back of the mattress,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The other surface of the mattress is divided into a zone A2 corresponding to the zone A1 and a zone B2 corresponding to the zone B1 according to the longitudinal area of the mattress,
The second protrusions are mattresses in which the longitudinal dimension is set larger than the first protrusions in the relationship between the corresponding zones.
According to Invention A, the hardness is different between the front and back sides, and the front side and the back side can be used properly according to the purpose and preference.

10 mattress, 12 first projection, 12ZA first projection (of front zone A1),
12ZB (front zone B1) first convex portion, 12a (first convex portion) root portion,
12b (of first protrusion) tip, 14 second protrusion, 14ZA second protrusion (of back zone A2),
14ZB Second convex portion (of back zone B2), 14a Root portion (of second convex portion),
14b tip (of the second protrusion), 16 base, 18 first groove,
18A horizontal first groove (first groove), 18B vertical first groove (first groove),
20 second groove, 20A lateral second groove (second groove),
20B Vertical second groove (second groove)

Claims (9)

A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first protrusion has a support surface for receiving the user's body, and is formed in a shape in which the central portion protrudes from the outer edge of the first protrusion facing the first groove,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. A mattress characterized by being set wider than the interval between the first projections adjacent to each other in the longitudinal direction. A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first protrusion has a support surface for receiving the user's body, and is formed in a shape in which the central portion protrudes from the outer edge of the first protrusion facing the first groove,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. set wider than the interval between the first convex portions adjacent to each other in the longitudinal direction,
The first convex portion includes a root portion connected to a base portion that supports the first convex portion, and a tip portion that is connected to the root portion and constitutes the support surface,
The first convex portion is formed in a constricted shape in which the outer edge of the support surface at the tip portion protrudes in the longitudinal direction more than the root portion, and the root portion is narrower than the tip portion in the longitudinal direction. ,
Among the first protrusions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1, the outer edge of the tip of the first protrusion forming the zone A1 is the first protrusion forming the zone B1. positioned closer to the base than the outer edge of the tip of the projection,
Among the first protrusions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1, the first protrusions forming the zone B1 are positioned closer to the base portion of the first protrusions forming the zone A1 than the first protrusions forming the zone B1. The base portion of the projection is longer in the projection direction of the first projection
A mattress characterized by: A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first protrusion has a support surface for receiving the user's body, and is formed in a shape in which the central portion protrudes from the outer edge of the first protrusion facing the first groove,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. set wider than the interval between the first convex portions adjacent to each other in the longitudinal direction,
The first convex portion includes a root portion connected to a base portion that supports the first convex portion, and a tip portion that is connected to the root portion and constitutes the support surface,
The first convex portion is formed in a constricted shape in which the outer edge of the support surface at the tip portion protrudes in the longitudinal direction more than the root portion, and the root portion is narrower than the tip portion in the longitudinal direction. ,
The first convex portion forming the zone A1 has a larger dimensional difference between the tip portion and the root portion in the longitudinal direction than the first convex portion forming the zone B1.
A mattress characterized by: A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first protrusion has a support surface for receiving the user's body, and is formed in a shape in which the central portion protrudes from the outer edge of the first protrusion facing the first groove,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. set wider than the interval between the first convex portions adjacent to each other in the longitudinal direction,
The second convex portion has a support surface for receiving the user's body, and is formed in a shape in which the central portion protrudes from the outer edge of the second convex portion facing the second groove,
The range of the longitudinal inclined surface formed on the support surface of the second convex portion is set narrower than the range of the longitudinal inclined surface formed on the support surface of the first convex portion. A mattress characterized by:
A mattress formed in a rectangular shape with elastically deformable soft foam,
A plurality of grooves are provided on one of the front and back surfaces of the mattress so as to protrude in the direction opposite to the other surface, and are arranged in a grid with first grooves extending in the longitudinal direction and the transverse direction of the mattress. a first convex portion;
A plurality of the mattresses are provided on the other surface of the front and back surfaces of the mattress so as to protrude in the direction opposite to the one surface, and are arranged in a grid pattern with the second grooves extending in the longitudinal direction and the lateral direction of the mattress in between. a second convex portion;
The first convex portion has a support surface for receiving a user's body formed only by a curved surface,
one side of the mattress is divided into zone A1 and zone B1 according to the longitudinal area of the mattress;
The first convex portion forming the zone A1 is set to have a larger dimension in the longitudinal direction than the first convex portion forming the zone B1,
The interval between the first convex portions adjacent in the longitudinal direction in the zone A1 and the interval between the first convex portions adjacent in the longitudinal direction at the boundary between the zone A1 and the zone B1 are equal to the above in the zone B1. It is set wider than the interval between the first protrusions adjacent to each other in the longitudinal direction
A mattress characterized by: In the first convex portion, a root portion connected to a base portion that supports the first convex portion and a tip portion connecting to the base portion and forming the supporting surface have the same width in the lateral direction. or a constricted shape in which the width of the root portion in the lateral direction is smaller than the width of the root portion in the longitudinal direction. The mattress described in . Among the plurality of second grooves extending in the longitudinal direction, other second grooves are provided at positions corresponding to the first protrusions and formed to reach inside the first protrusions. A mattress according to any one of claims 1 to 6, wherein there is a deep longitudinal second groove that is deeper than the groove . The other surface of the mattress is divided into a zone A2 corresponding to the zone A1 and a zone B2 corresponding to the zone B1 according to the longitudinal area of the mattress,
8. The mattress according to any one of claims 1 to 7 , wherein the second projections are set larger in longitudinal dimension than the first projections in the relationship between corresponding zones . The second convex portion includes a root portion connected to a base portion that supports the second convex portion, and a distal end portion that is connected to the root portion and constitutes a support surface that receives the user's body,
The second convex portion is formed in a constricted shape in which the outer edge of the support surface at the tip portion protrudes in the longitudinal direction more than the root portion, and the root portion is narrower than the tip portion in the longitudinal direction. The mattress according to any one of claims 1 to 8.

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