JP7708422B2 - mattress - Google Patents

Description

The present invention relates to a mattress.

The mattress is made of flexible materials such as urethane resin, and acts as a cushioning material to flexibly support the weight of the body of the person lying down.

Conventionally, when a person lies on their back on the mattress, their back, buttocks and heels protrude downward, increasing bodily pressure. To improve comfort, therefore, there is a demand for mattresses that can more flexibly absorb the body weight at the positions corresponding to the back, buttocks and heels of the person lying down.

Conventionally, slits have been formed on the surface of the mattress to increase its flexibility (see, for example, Patent Document 1).

JP 2017-70452 A

However, if slits are provided on the surface of the mattress at positions that correspond to the back, buttocks, or heels of a person lying on their back or side, the body pressure of the person lying on the bed will be repeatedly applied to the slits, and there is a risk that the mattress will break at the slits. In addition, when the mattress is washed, pressure will be applied to the slits, and there is a risk that the mattress will break at the slits.

Therefore, simply providing slits at positions corresponding to the back, buttocks, and heels of a reclining person may result in a mattress with low durability.

Therefore, in the present invention according to claim 1, in a mattress, a base layer harder than the surface layer is provided on the underside of the surface layer, a back layer is provided on the underside of the base layer, and a plurality of grooves of a predetermined width extending widthwise at a position in the surface layer corresponding to the buttocks and/or heels of a person lying down and a depth that does not reach the base layer are provided in the surface layer , and a plurality of grooves of a predetermined width extending widthwise at a position in the back layer corresponding to the knees of the person lying down and a depth that does not reach the base layer are provided in the back layer, and a plurality of grooves of a predetermined width extending widthwise at a position in the surface layer and back layer corresponding to the back of the person lying down and a depth that reaches halfway through the base layer are alternately provided in the surface layer and back layer to form a bellows shape .

In a second aspect of the present invention, the base layer in the first aspect of the present invention is harder and thinner than the front and back layers .

Furthermore, in the present invention as claimed in claim 3, in the present invention as claimed in claim 1 or claim 2, a handle is provided on each of the front end side and the central side of the mattress cover, and the mattress cover is placed over the mattress so that the position between the handle on the front end side and the handle on the central side corresponds to the back of a person lying down, and the mattress is bent between the handle on the front end side and the handle on the central side so that the handle on the front end side and the handle on the central side of the mattress cover can be overlapped and grasped .

In addition, in the present invention according to claim 4, in the present invention according to any one of claims 1 to 3, a removable mattress cover having water absorbency and/or hydrophilicity is provided to cover the grooves.

And the present invention has the following advantages:

In other words, in the mattress of the present invention, a base layer harder than the surface layer is provided on the underside of the surface layer, and multiple grooves of a predetermined width extending widthwise in the surface layer at positions corresponding to the back and/or buttocks and/or heels of a person lying down, and a depth that does not reach the base layer, are provided. This makes it possible to better distribute body pressure in the positions corresponding to the back, buttocks and heels of a person lying down where body pressure tends to concentrate, improving sleeping comfort, and because the grooves do not reach the base layer harder than the surface layer, it is possible to prevent the mattress from breaking even if it is repeatedly subjected to body pressure from a person lying down or if repeated force is applied during cleaning.

In particular, a back layer that is harder than the front layer is provided on the underside of the base layer, and multiple grooves of a certain width that extend widthwise and are deep enough not to reach the base layer are provided in the back layer at positions corresponding to the knees of a person lying down. This allows flexibility at the knees to be maintained even when lying down on the back layer side without compromising comfort due to the hardness of the back layer.

In addition, if a back layer harder than the front layer is provided on the underside of the base layer, and multiple grooves of a predetermined width extending widthwise and reaching a depth reaching halfway through the base layer are alternately provided on the front and back layers at positions corresponding to the back of the person lying down to form an accordion-like shape, it is possible to improve the flexibility of the mattress at the back and reduce the body pressure on the back of the person lying down.

In addition, a removable mattress cover that is water-absorbent and/or hydrophilic is provided to cover the grooves, forming a space under the mattress cover due to the grooves, allowing moisture such as sweat to dry more quickly.

1A is a plan view showing a mattress and a mattress cover, and FIG. 1A is a plan view, FIG. 1B is a side view, and FIG. FIG. FIG. FIG. 2 is an explanatory diagram showing the shape of the mattress during transportation.

The specific configuration of the mattress according to the present invention will be explained below with reference to the drawings.

As shown in FIG. 1, the mattress 1 is an elongated rectangular plate made of elastic urethane resin or the like, and is entirely covered with a removable mattress cover 2.

As shown in Figures 1 and 2, the mattress 1 has a base layer 3 in the shape of a vertically long rectangular plate, a surface layer 4 of the same shape attached to the top surface of the base layer 3, and a back layer 5 of the same shape attached to the bottom surface of the base layer 3.

Here, the mattress 1 has a base layer 3 that is the hardest and thinnest, and a back layer 5 that is harder and thinner than the surface layer 4, and can be used upside down; if a softer sleeping experience is preferred, the mattress is used with the surface layer 4 side facing up, and if a firmer sleeping experience is preferred, the mattress is used with the back layer 5 side facing up.

As shown in Figures 2 and 3, this mattress 1 has multiple grooves 7 that extend across the entire width from the left end to the right end at positions on the surface layer 4 that correspond to the back (including the shoulders) of a person 6 (a person lying on the bed in a supine or lateral position).

The grooves 7 have a constant width w1 in the front-to-rear direction, and are formed to a depth d1 that reaches from the upper end surface of the surface layer 4 to the middle of the base layer 3, and are arranged in parallel in the front-to-rear direction at a constant interval t1 (Figure 3(a)).

As a result, the mattress 1 is formed with a bent portion 8 that can be easily bent toward the surface layer 4 at a position (the front end side of the mattress 1) that corresponds to the back of the recumbent 6. This bent portion 8 also functions as a body pressure reducing portion that can reduce the body pressure on the back of the recumbent 6 in the surface layer 4.

In addition, the mattress 1 has multiple grooves 9 formed in the back layer 5 at positions corresponding to the back of the recumbent 6, which extend across the entire width from the left end to the right end.

The grooves 9 have a constant width w2 in the front and rear, are formed to a depth d2 that reaches from the lower end surface of the back layer 5 to the middle of the base layer 3, and are arranged in parallel in the front and rear at a constant interval t2 (Figure 3(a)). Here, the interval t1 of the grooves 7 formed in the front layer 4 and the interval t2 of the grooves 9 formed in the back layer 5 are made the same, and the grooves 7 on the front layer 4 side and the grooves 9 on the back layer 5 side are alternately arranged so that the grooves 9 on the back layer 5 side are located between the adjacent grooves 7, 7 on the front layer 4 side, forming a bellows shape as a whole.

As a result, the mattress 1 is formed with a bent portion 10 that can be easily bent toward the back surface layer 5 at a position (the front end side of the mattress 1) that corresponds to the back of the recumbent 6. This bent portion 10 also functions as a body pressure reducing portion that can reduce the body pressure on the back of the recumbent 6 in the back surface layer 5.

In addition, the mattress 1 has multiple grooves 11 formed in the surface layer 4 at positions corresponding to the buttocks of the recumbent 6, extending across the entire width from the left end to the right end.

These grooves 11 have a constant width w3 in the front-to-rear direction, and are formed with a depth d3 from the top surface of the surface layer 4 to the middle of the surface layer 4, not reaching the base layer 3, and are arranged in parallel in the front-to-rear direction at a constant interval t3 (Figure 3(b)).

As a result, the mattress 1 has a body pressure reducing section 12 formed in the surface layer 4 at a position corresponding to the buttocks of the reclining person 6, which can reduce the body pressure on the buttocks of the reclining person 6.

In addition, the mattress 1 has multiple grooves 13 formed in the surface layer 4 at positions corresponding to the heels of the recumbent 6, which extend across the entire width from the left end to the right end.

The grooves 13 have a constant width w4 from front to back, and are formed with a depth d4 from the top surface of the surface layer 4 to the middle of the surface layer 4, not reaching the base layer 3, and are arranged in parallel at a constant interval t4 from front to back (Figure 3(d)).

As a result, the mattress 1 is formed with a body pressure reducing portion 14 that can reduce the body pressure at the heels of the recumbent person 6 at a position on the surface layer 4 that corresponds to the heels of the recumbent person 6.

Furthermore, the mattress 1 has multiple grooves 15 formed in the back layer 5 at a position corresponding to the knees of the reclining person 6 (behind the position in the front layer 4 corresponding to the area between the buttocks and heels of the reclining person 6) that extend across the entire width from the left end to the right end. Note that forming multiple grooves 15 in the back layer 5, which is harder than the front layer 4, reduces the firmness of the mattress. However, by forming grooves 15 behind the knees of the reclining person 6, who has less contact with the mattress 1 (back layer 5) when lying on the back layer 5 side, the reduced firmness of the back layer 5 due to the formation of the grooves 15 is less felt, and the comfort of sleeping on the back layer 5 is not impaired.

The grooves 15 have a constant width w5 from front to back, and are formed with a depth d5 from the lower end surface of the back surface layer 5 to the middle of the back surface layer 5, not reaching the base layer 3, and are formed in parallel with each other at a constant interval t5 from front to back (Figure 3(c)).

As a result, the mattress 1 has a bent portion 16 that can be easily bent toward the back surface layer 5 at a position on the back surface layer 5 that corresponds to the knees of the recumbent 6. This bent portion 16 also functions as a body pressure reducing portion that can reduce body pressure on the knees of the recumbent 6 on the back surface layer 5.

As shown in Figure 4, when the mattress 1 having the above configuration is used on a reclining bed 17, the body pressure reduction section 12 is located above the buttocks support 18 fixed to the bed 17, the bent sections 8 and 10 are located above the bent section between the back support 19 and shoulder support 20 which tilt up relative to the buttocks support 18, the bent section 16 is located above the bent section between the thigh support 21 and lower leg support 22 which tilt up relative to the buttocks support 18, and the body pressure reduction section 14 is located above the lower leg support 22. By positioning the curved portions 8, 10, and 16 of the mattress 1 above the curved portion between the back support 19 and shoulder support 20 of the bed 17 and above the curved portion between the thigh support 21 and lower leg support 22, the mattress 1 has improved compliance when the bed 1 is reclined, preventing the body of the recumbent 6 from slipping down and putting a strain on the body.

In the mattress 1, multiple grooves 11, 13 are formed in the surface layer 4 at positions corresponding to the buttocks and heels of the recumbent 6, extending widthwise, with a depth that does not reach the base layer 3. However, this is not limited to this, and the grooves may be formed in positions corresponding to the back and/or buttocks and/or heels of the recumbent 6 in the surface layer 4.

As shown in FIG. 1, the mattress cover 2 that covers the mattress 1 is provided with a pair of handles 23, 24 for use during transportation.

Here, handles 23, 24 are provided asymmetrically at the front end and center of one long side of the rectangular, vertically elongated mattress cover 2.

As shown in FIG. 5, the mattress cover 2 is formed by bending the mattress 1 between the handle 23 on the front end side and the handle 24 on the center side, so that the handle 23 on the front end side and the handle 24 on the center side of the mattress cover 2 can be overlapped, and both handles 23, 24 can be held with one hand.

As a result, when the handle 23 on the front end side of the mattress cover 2 and the handle 24 on the center side are overlapped, the mattress 1 is overlapped only on the front side of both handles 23, 24, and the mattress 1 is not overlapped on the rear side of both handles 23, 24, so the carrier can carry the mattress 1 in a position where he/she stands on the rear side of both handles 23, 24 and holds both handles 23, 24 in front of the carrier.

In particular, in the mattress 1, the bent portion 8 of the surface layer 4 and the bent portion 10 of the back layer 5 are formed at a position corresponding to the handle 23 on the front end side and the handle 24 on the center side of the mattress cover 2, so that the mattress 1 can be easily bent between the handle 23 on the front end side and the handle 24 on the center side, and the mattress 1 can be easily bent either toward the surface layer 4 side (Figure 5 (a)) or toward the back layer 5 side (Figures 5 (b) and (c)).

The mattress cover 2 can be made of a material that has water absorption and hydrophilic properties. Even if moisture from drinks or sweat drips onto the mattress cover 2, the water absorption properties of the mattress cover 2 absorb it, and the hydrophilic properties of the mattress cover 2 diffuse the moisture, allowing the surface of the mattress cover 2 to dry quickly and prevent stuffiness. In addition, by using polyester as the base fabric material for the mattress cover 2 instead of the conventional nylon, it is possible to mix a flame retardant (fireproofing agent) with polyurethane and apply it to the base fabric before carrying out a hydrophilic treatment, thereby achieving a hydrophilic treatment with flame retardant properties.

In particular, the mattress 1 has grooves 7, 9, 11, and 13 formed in positions corresponding to the back, buttocks, and heels of the recumbent 6, where the body pressure is greater than in other areas. When the grooves 7, 9, 11, and 13 are covered with the mattress cover 2, spaces of predetermined widths w1, w2, w3, and w4 and predetermined depths d1, d2, d3, and d4 are formed on the back side of the mattress cover 2, allowing sweat and the like to dry more quickly.

As explained above, the mattress 1 is configured such that a base layer 3 harder than the surface layer 4 is attached to the underside of the surface layer 4, and a plurality of grooves 11, 13 of predetermined widths w3, w4 and depths d3, d4 not reaching the base layer 3 are provided in the surface layer 4 at positions corresponding to the back and/or buttocks and/or heels of the recumbent 6, extending widthwise.

Therefore, the mattress 1 configured as described above can more flexibly receive the body weight of the recumbent 6 at the positions corresponding to the buttocks and heels, improving the comfort of the mattress, and since the grooves 11, 13 do not reach the base layer 3, which is harder than the surface layer 4, the mattress 1 can be prevented from breaking even if it is repeatedly subjected to the body pressure of the recumbent 6 or if repeated force is applied during cleaning.

The mattress 1 can be turned over for use by attaching a back layer 5, which is harder than the front layer 4, to the underside of the base layer 3, and is configured with a plurality of grooves 15, each with a predetermined width w5 and a depth d5 that does not reach the base layer 3, extending widthwise in the back layer 5 at a position corresponding to the knees of the recumbent 6.

Therefore, with the mattress 1 configured as described above, even when the user turns over and lies on the back surface layer 5 side, the flexibility of the knees can be maintained without compromising the comfort of sleeping due to the hardness of the back surface layer 5.

The mattress 1 is also provided with a removable mattress cover 2 that is absorbent and/or hydrophilic, and the grooves 11, 13, and 15 are covered with the mattress cover 2, so that the grooves 11, 13, and 15 form spaces under the mattress cover 2, allowing moisture such as sweat to dry more quickly.

The mattress 1 is a rectangular, elongated mattress 1 entirely covered with a mattress cover 2, and handles 23, 24 are provided at the front and center of the long sides of the mattress cover 2, so that the mattress 1 can be bent between the handle 23 at the front end and the handle 24 at the center, allowing the handle 23 at the front end and the handle 24 at the center of the mattress cover 2 to be held with one hand.

Therefore, with the mattress 1 configured as described above, the mattress 1 overlaps only on the front side of both handles 23, 24, and does not overlap on the rear side of both handles 23, 24. The carrier can transport the mattress 1 while standing on the rear side of both handles 23, 24 and holding both handles 23, 24 in front of the carrier. This reduces the width occupied during transportation, and allows the mattress to be transported in narrow spaces as long as the width is the width of the carrier's body and the thickness of one mattress 1, improving workability and safety during transportation.

The mattress 1 is also configured with easily bendable bending sections 8, 10 formed between the handle 23 on the front end side and the handle 24 on the center side of the mattress 1.

Therefore, with the mattress 1 configured as above, the mattress 1 can be easily bent at the bending portions 8, 10 during transportation, and the handle 23 on the front end side and the handle 24 on the center side of the mattress cover 2 can be grasped with one hand.

The mattress 1 has grooves 7, 9 extending in the width direction alternately provided on the front and back surfaces of the mattress 1 to form bending portions 8, 10, allowing the mattress 1 to be bent to either the front or back side at the bending portions 8, 10.

Therefore, with the mattress 1 configured as described above, the bent posture of the mattress 1 can be changed during transport depending on the dominant hand of the transporter and the condition of the passageway along which the mattress 1 is being transported.

REFERENCE SIGNS LIST 1 Mattress 2 Mattress cover 3 Base layer 4 Surface layer 5 Back layer 6 Lying person 7 Groove 8 Bend 9 Groove 10 Bend
11 Groove 12 Pressure reducing portion
13 Groove 14 Pressure reducing portion
15 Groove 16 Bend
17 Bed 18 Buttocks support
19 Back cradle 20 Shoulder cradle
21 Thigh cradle 22 Lower leg cradle
23,24 Handle

Claims (4)

A mattress characterized in that a base layer harder than the surface layer is provided on the underside of the surface layer, a back layer is provided on the underside of the base layer, and a plurality of grooves of a predetermined width extending widthwise at positions in the surface layer corresponding to the buttocks and/or heels of a person lying down and a depth that does not reach the base layer are provided in the surface layer , and a plurality of grooves of a predetermined width extending widthwise at positions in the back layer corresponding to the knees of the person lying down and a depth that does not reach the base layer are provided in the back layer, and a plurality of grooves of a predetermined width extending widthwise at positions in the surface layer and back layer corresponding to the back of the person lying down and a depth that reaches halfway through the base layer are provided alternately in the surface layer and back layer to form a bellows shape . 2. The mattress of claim 1, wherein the base layer is harder and thinner than the top layer and the back layer . A mattress as described in claim 1 or claim 2, characterized in that the mattress cover has handles on the front end and central side, the mattress cover is covered with the mattress so that the position between the handle on the front end and the handle on the central side corresponds to the back of a person lying down, and the mattress is bent between the handle on the front end and the handle on the central side so that the handle on the front end and the handle on the central side of the mattress cover can be overlapped and grasped . The mattress according to any one of claims 1 to 3, characterized in that a removable mattress cover having water absorbency and/or hydrophilicity is provided to cover the grooves.