JP7787571B2 - mattress - Google Patents

Description

The present invention relates to a mattress having a mattress body made of three-dimensionally bonded filaments that extend in the front-to-back direction, which corresponds to the height of a person lying down, as well as in the left-to-right and up-to-down directions.

Conventionally, the cushioning material inside mattresses has been a mattress body made of three-dimensionally bonded filaments that extend in the front-to-back direction (the same direction as the height of a person lying down), the left-to-right direction, and the up-to-down direction (see, for example, Patent Document 1).

A known conventional mattress is one in which a lower mattress body of a fixed height and an upper mattress body of a fixed height are stacked one on top of the other, with the filament density of the upper mattress body being lower than that of the lower mattress body.

Patent No. 6912471

However, in the conventional mattresses mentioned above, the filament density is constant in the front-to-back direction, which corresponds to the height of a person lying down, and in the left-to-right direction, which is perpendicular to that.

When a person lies down on a mattress, the weight distribution on the surface (lying surface) of the mattress varies depending on the height. However, with the conventional mattresses described above, the cushioning on the surface (lying surface) of the mattress is uniform in both the front-to-back and left-to-right directions, which makes sleeping on the mattress uncomfortable.

Therefore, in the present invention according to claim 1, the mattress has a mattress body made of a three-dimensional filament bond extending in the front-to-back direction, which corresponds to the height direction of a person lying down, as well as in the left-to-right direction and the up-to-down direction, and the mattress body has an upper layer and a lower layer with different filament densities, the upper surface of the upper layer and the lower surface of the lower layer are flat surfaces , the lower surface of the upper layer and the upper surface of the lower layer are uneven surfaces, the lower layer has a higher filament density and is harder than the upper layer, and the thickness of the lower layer is thinner at the part corresponding to the head of the person lying down than the part corresponding to the back, and thinner at the part corresponding to the waist than the part corresponding to the head of the person lying down .

In a second aspect of the present invention, in the first aspect of the present invention, the mattress body is configured so that the thickness of the lower layer is greatest at the front and rear end portions .

In addition, in the present invention according to claim 3, in the present invention according to claim 1 or claim 2, the lower surface of the upper layer and the upper surface of the lower layer of the mattress body are curved surfaces with different heights in the front-to-back and left-to-right directions .

The present invention achieves the following effects:

In other words, this invention provides a mattress having a mattress body made of three-dimensionally bonded filaments that extend in the front-to-back direction, which corresponds to the height of a person lying down, as well as in the left-to-right and up-to-down directions. The mattress body has upper and lower layers with different filament densities, and the lower surface of the upper layer and/or the upper surface of the lower layer is not flat but is uneven, or is concave or convex. This allows the cushioning on the surface (lying surface) of the mattress to change in the height direction of the person lying down, improving sleeping comfort.

In particular, if the underside of the upper layer and/or the upper surface of the lower layer of the mattress body is made into a curved, uneven surface or a concave or convex surface that changes continuously in a curved manner, it is possible to create changes in cushioning that suit the body shape of the person lying down, which further improves sleeping comfort.

Furthermore, if a boundary layer with continuously varying filament density is provided between the underside of the upper layer and the upper surface of the lower layer of the mattress body, changes in cushioning properties are alleviated, further improving sleeping comfort.

1 is a perspective view illustrating a mattress according to the present invention. FIG. Cross-sectional explanatory diagram of the mattress body (front-to-back cross section (a), left-to-right cross section of the front and back ends and back (b), left-to-right cross section of the head (c), left-to-right cross section of the waist (d)). An explanatory diagram of a cross section of the mattress body in the front-to-back direction.

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

As shown in Figures 1 to 3, the mattress 1 contains a mattress body 3 inside a rectangular box-shaped bag-like exterior material 2.

The mattress body 3 is formed by three-dimensionally bonded filaments into a rectangular plate shape that extends in the front-to-back direction (left-to-right in Figure 1), which corresponds to the height of a person lying down, as well as in the left-to-right and up-to-down directions perpendicular to the front-to-back direction. The three-dimensionally bonded filaments are formed by fusing filaments made of multiple molten thermoplastic resin fibers into a three-dimensional net shape and then cooling them. Thermoplastic resin materials such as polyethylene and polypropylene are used for the filaments.

This mattress body 3 has an upper layer 4 formed on the upper side and a lower layer 5 formed on the lower side, with a boundary layer 6 integrally formed between the upper layer 4 and the lower layer 5.

The upper layer 4 has a lower filament density in the three-dimensional filament bond than the lower layer 5, making it softer and more stretchable in the vertical direction than the lower layer 5.

In addition, the upper surface of the upper layer 4 is a flat surface with a uniform height, while the lower surface (the boundary surface of the upper layer 4) is not flat but is uneven, resulting in a shape with varying thickness in the front-to-back direction.

The lower layer 5 has a higher filament density in the three-dimensional filament bond than the upper layer 4, making it stiffer and with a lower vertical stretch rate than the upper layer 4.

In addition, the lower surface of the lower layer 5 is a flat surface with a uniform height, while the upper surface (the boundary surface of the lower layer 5) is not flat but is uneven, resulting in a shape with varying thickness in the front-to-back direction.

The upper surface of boundary layer 6 has the same shape as the lower surface (boundary surface) of upper layer 4 and is integrally bonded to the lower surface of upper layer 4, and the lower surface has the same shape as the upper surface (boundary surface) of lower layer 5 and is integrally bonded to the upper surface of lower layer 5.

In this boundary layer 6, the upper surface has the same filament density (relatively low density) as the upper layer 4, and the lower surface has the same filament density (relatively high density) as the lower layer 5, with the filament density gradually and continuously changing (increasing) from the upper surface to the lower surface.

In the mattress body 1, the shape of the underside of the upper layer 4 and the upper side of the lower layer 5 are adapted to the shape of the body of a person lying down. As shown in Figure 3(a), the thickness of the lower layer 5 is thickest at the front and rear ends and in the area corresponding to the back of the person lying down (Figure 3(b)), thinner at the area corresponding to the head than the area corresponding to the back of the person lying down (Figure 3(c)), and thinner at the area corresponding to the waist than the area corresponding to the head (Figure 3(d)).

In this way, in the mattress body 1, the lower surface of the upper layer 4 and the upper surface of the lower layer 5 have the same uneven surface shape, but this is not limited to this; the lower surface of the upper layer 4 and the upper surface of the lower layer 5 may have different shapes, and the lower surface of the upper layer 4 and the upper surface of the lower layer 5 may be concave or convex rather than uneven. Furthermore, the lower surface of the upper layer 4 and the upper surface of the lower layer 5 are not limited to curved uneven surfaces, concave or convex surfaces that change continuously in a curved manner when viewed from the side, but may also be flat uneven surfaces, concave or convex surfaces that change discontinuously in a linear manner when viewed from the side.

Furthermore, the lower surface of the upper layer 4 and the upper surface of the lower layer 5 do not have to be flat. As shown in Figure 4(a), the lower surface of the upper layer 4 may be uneven, concave, or convex, and the upper surface of the lower layer 5 may be flat. Alternatively, as shown in Figure 4(b), the lower surface of the upper layer 4 may be flat, and the upper surface of the lower layer 5 may be uneven, concave, or convex. As in this case, the shapes of the lower surface of the upper layer 4 and the upper surface of the lower layer 5 may be different, and the thickness of the boundary layer 6 may be different accordingly.

Furthermore, the lower surface of the upper layer 4 and the upper surface of the lower layer 5 are designed to have different heights only in the front-to-back direction, but this is not limited to this, and they may also be curved surfaces with different heights in the left-to-right direction.

Furthermore, the lower surface of the upper layer 4 and the upper surface of the lower layer 5 may be formed in the same shape, and the upper layer 4 and the lower layer 5 may be directly and integrally bonded together to eliminate the need to form the boundary layer 6.

As explained above, the mattress 1 has a mattress body 3 made of three-dimensional filament bonds that extend in the front-to-back direction, which corresponds to the height of a person lying down, as well as in the left-to-right and up-to-down directions. The mattress body 3 has an upper layer 4 and a lower layer 5 with different filament densities, and the lower surface of the upper layer 4 and/or the upper surface of the lower layer 5 is not flat but is uneven, or is concave or convex.

As a result, with the mattress 1 configured as described above, the cushioning on the surface (lying surface) of the mattress 1 can be changed in the direction of the person's height, improving sleeping comfort.

The mattress 1 is also configured so that the lower surface of the upper layer 4 and/or the upper surface of the lower layer 5 of the mattress body 3 are curved, uneven surfaces, or concave or convex surfaces that change continuously in a curved manner.

As a result, the mattress 1 configured as described above can change its cushioning properties to suit the body shape of the person lying down, further improving sleeping comfort.

The mattress 1 also has a boundary layer 6 between the underside of the upper layer 4 and the upper surface of the lower layer 5 of the mattress body 3, in which the filament density varies continuously.

As a result, in the mattress 1 configured as described above, the boundary layer 6 reduces changes in cushioning, further improving sleeping comfort.

1 Mattress 2 Outer material 3 Mattress body 4 Upper layer 5 Lower layer 6 Boundary layer

Claims (3)

A mattress having a mattress body made of a three-dimensional filament bonded body extending in the front-to-back direction, which corresponds to the height direction of a person lying down, the left-to-right direction, and the up-to-down direction,
The mattress body has an upper layer and a lower layer with different filament densities, and the upper surface of the upper layer and the lower surface of the lower layer are flat surfaces, and the lower surface of the upper layer and the upper surface of the lower layer are uneven surfaces ,
The lower layer is made to have a higher filament density and be harder than the upper layer.
This mattress is characterized in that the thickness of the lower layer is made thinner at the part corresponding to the head of the person lying down than at the part corresponding to the back, and is made thinner at the part corresponding to the waist of the person lying down than at the part corresponding to the head . 2. The mattress according to claim 1, wherein the mattress body has a thickness that is greatest at the front and rear ends of the lower layer . 3. The mattress according to claim 1, wherein the mattress body has a lower surface of the upper layer and an upper surface of the lower layer that are curved and have different heights in the front-to-back and left-to-right directions .