JPH11299585A - Cushion body for seat and chair assembled with the cushion body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushion body for a seat to be placed on a chair or the like to comfortably support the waist only by sitting on a seat part and a chair in which the cushion body is assembled. SOLUTION: As a cushion body 1 for a seat to be placed on a chair or the like, a cushion part 2 for a seat part for supporting the buttocks at the time of sitting and a waist cushion part 3 for supporting the waist are provided. As the respective cushion parts 2 and 3, an air-tight sheet 7 of vinyl chloride or the like is stuck on the front and rear sides of a formed material 5 such as foamed urethane having continuous air cells by using an adhesive agent 6, the inside is sealed and the internal space of the cushion part 2 for the seat part and the internal space of the cushion part 3 for the waist are mutually communicated to each other by a communication path 4. Moreover, a valve 8 is provided for controlling the quantity of air in the internal sealed space. Further, the cushion body 1 for the seat can be assembled in the chair as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion and a chair for supporting a seating portion and a waist when the user sits.

[0002]

2. Description of the Related Art Conventionally, for example, in a seat of a vehicle or the like,
A lumbar support mechanism that pushes and supports the lumbar region from the seat back to alleviate fatigue of the lumbar region during long-distance driving or the like is known. As such a lumbar support mechanism, the lumbar region is manually or pneumatically or mechanically operated. The general method is to press.

[0003]

However, in the case of the above-mentioned lumbar support mechanism, when the mechanical support is used, the support portion may be too hard to give a sense of incongruity. Therefore, there is a problem that the support is likely to be unstable and the operation for supplying air is troublesome. In addition, in a general chair or the like, if there is no lumbar support mechanism, there is also a problem that the waist is easily fatigued when sitting for a long time.

Accordingly, the present invention provides a cushioning member for a seat that can comfortably support the lumbar region without manually supplying air and that can support the lumbar region even in a chair without a lumbar support mechanism. The purpose is to provide a chair that incorporates

[0005]

According to the present invention, in order to attain the above object, according to the first aspect of the present invention, there is provided a seat cushion comprising a seat cushion for supporting a hip and a waist cushion for supporting a waist when seated. Body, and the seat cushion and the waist cushion are configured as a foam enclosure in which the periphery of a foam material having open cells is covered with an airtight sheet and the inside is sealed. The insides of the seals are communicated with each other through a communication passage.

When such a seat cushion is placed on a chair, a sofa, or the like having a seat and a back, and seated on the seat cushion, the seat cushion may be used depending on the weight of the user when sitting. The air inside the sealed portion of the foam enclosure moves through the communication passage into the sealed interior of the foam enclosure of the waist cushion portion and expands, so that the waist is automatically cushion-supported. At this time, for example, when only gas is sealed in the sealed interior, the content flows and the support lacks stability, but since the foam material for supplying and discharging air is sealed inside, there is no so-called bottom feeling. Stable support is possible. The chair, sofa and the like at this time can be applied to any kind of chair and the like as long as they have a seat portion and a back portion, and the waist can be comfortably supported even in a chair without a lumbar support mechanism.

Here, as the foam enclosure, for example, a so-called self-expanding air mattress structure as shown in JP-B-61-33566 and JP-A-7-79842 can be applied.

According to a second aspect of the present invention, a valve for sucking / exhausting the air inside the sealed portion is provided at an arbitrary position in the foam enclosure or the communication passage.

By providing a valve for sucking / exhausting air inside the seal as described above, for example, the amount of air inside the seal can be fine-adjusted to adjust the degree of cushion to a desired level.
In addition, when not in use, the air can be removed and the product can be folded compactly. Here, a plurality of valves may be provided dispersedly at a plurality of locations, or may be provided at only one location.

According to a third aspect of the present invention, at least a portion of the seat of the chair corresponding to the buttocks is provided with a foam enclosure in which a foam material having open cells is covered with an air-tight sheet and the inside is sealed. At least at the portion corresponding to the waist portion of the back of the foamed material, a foam material having open cells is wrapped around the foam material with an airtight sheet, and the inside of the foam material is hermetically sealed. It was made to communicate by a passage.

That is, by incorporating the seat cushion according to the first aspect into a chair, the waist is automatically cushioned when sitting on the seat. At this time, if a valve for sucking / exhausting the air inside the hermetically sealed air is provided at an arbitrary position in the foam enclosing body or the communication passage as in claim 4, the amount of air inside can be adjusted according to the preference of each person. Adjustable and comfortable cushioning.

[0012]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a perspective view showing an example of a seat cushion body according to the present invention, and FIG.
3 is an operation view, and FIG. 4 is a cross-sectional view showing an example of a chair incorporating the cushion body.

The seat cushion 1 according to the present invention comprises:
The cushion member 2 is configured as a cushion body in which the buttocks and the waist are comfortably supported simply by being placed on a chair or a sofa having a back and a seat. As shown in FIG. And a waist cushion 3 for supporting the waist, and a communication path 4 for connecting the both.

The basic structure of the cushion portion 2 for the seat portion and the cushion portion 3 for the waist portion are almost the same. As shown in FIG. The airtight sheet 7 is adhered, and the inside is hermetically sealed. And cushion part 2 for seat
And the internal space of the waist cushion portion 3 are communicated through the communication passage 4. In the embodiment, the air in the internal space is sucked and exhausted at a predetermined portion of the seat cushion portion 2. Valve 8 is provided.

Here, as the foam material 5, various materials such as soft urethane foam, polyester foam, polyethylene foam, vinyl chloride foam, polybutadiene foam and foam rubber can be used. 0.5 kg / cm ² or more, tear strength 0.2 kg / cm ² or more, elongation 150%
It is preferable that the material has at least the above characteristics. Further, in the case of the cushion portion 2 for the seat portion, the shape and the like have a width and a depth that can reliably support the buttocks, and a level that does not cause a so-called bottom feeling even when a load is applied in the vertical direction. It is preferable to have a thickness, and in the case of the waist cushion portion 3, for example, it is preferable that the waist cushion portion 3 has a relatively long shape and can reliably support the waist.

The airtight sheet 7 may be a flexible plastic sheet such as vinyl chloride, polyethylene, polyacetate, polyvinyl alcohol, or the like, or a resin film or the like may be laminated on a cloth or impregnated with a resin, rubber, or the like. Can be used, and as the adhesive 6, for example, various adhesives such as an epoxy-based, acrylic-based, rubber-based, and urethane-based adhesive can be used.

The valve 8 can be a general valve that supplies and discharges air by adjusting the amount of screw tightening. In the embodiment, the center of the tip of the cushion portion 2 for the seat portion is used. Although it is provided in the portion, it may be provided in the waist cushion portion 3 or the communication passage 4, and the number and the like are arbitrary.

The communication passage 4 can be made of any material, but it is flexible so that the user does not feel uncomfortable when carrying or sitting, and can be expanded even when the internal pressure increases. It is preferable that air can be sent to each cushion portion without doing so. For example, a pipe-shaped or connected bag-shaped material made of a material such as synthetic resin such as vinyl chloride, polyethylene, or polyolefin, or rubber such as silicon rubber or synthetic rubber can be used. Depending on the method of use, shape, and the like, it is also possible to use those made of metal.

In the seat cushion 1 as described above, when the valve 8 is released and the air in the internal space is discharged, the air contained in the foam material 5 is discharged to the outside and the whole is crushed into a flat shape and crushed. When the valve 8 is tightened in this state,
The seat cushion body 1 can be folded small and is convenient for carrying and storing, but when the valve 8 is released again from that state, the foam material 5 self-expands by sucking external air, and Restore to shape.

When the valve 8 is closed in a self-inflated state, and a seating load P is applied to the cushion 2 for seating, for example, as shown in FIG. Into the waist cushion 3 through
The waist cushion 3 expands and can automatically support the waist. Further, at this time, since the foam material 5 is provided inside the cushion portion 2 for the seat portion, a so-called bottom feeling is suppressed, and the buttocks are supported in a more stable state.

Further, by adjusting the amount of air in the interior with the valve 8, it is possible to adjust the cushioning property to suit the taste of each person.

The seat cushion 1 as described above may be incorporated in a chair 10 as shown in FIG. That is, the cushion portion 2 for the seat portion is provided inside the seat portion 11 of the chair 10, the cushion body 3 for the waist portion is provided inside the back portion 12, and the communication is performed through the communication passage 4.

When the chair 10 thus constructed is seated on the seat 11, the air in the cushion 2 for the seat moves to the cushion 3 for the waist, and the waist is automatically supported. Here, the type and the like of the chair 10 are arbitrary, and the mounting position and the like of the valve 8 are also arbitrary.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the shape and the like of the communication path 4 of the seat cushion 1 are arbitrary,
Further, the valve 8 may not be provided.

[0025]

As described above, the seat cushion body according to the present invention has a seat cushion portion for supporting the buttocks and a waist cushion portion for supporting the waist when seated. A cushion body is provided, and each cushion portion is composed of a foam enclosure in which the interior of the foam material having open cells is covered with an airtight sheet and the interior is sealed, and the sealed interior of each foam enclosure is connected to each other. Because it is made to communicate via the communication passage, if it is placed on a chair, sofa, etc. and sits on the cushion for the seat, the weight inside the seat cushion inside the foam enclosure of the cushion for the seat depends on the weight when sitting. The air moves through the communication passage into the inside of the foam enclosure of the waist cushion portion and expands, and the waist is automatically cushion-supported. Chairs and sofas at this time are convenient because they can be applied to any kind of chair provided that they have a seat and a back.

According to a second aspect of the present invention, the air inside the hermetic seal is sucked and sucked into any part of the foam enclosure or the communication passage.
If a valve to exhaust air is provided, for example, the amount of air inside the seal can be fine-tuned to adjust the degree of cushion to suit each person's preference, and when not in use, the air can be extracted and compactly folded, and stored It is convenient for carrying around. If the seat cushion is incorporated in the chair as in claim 3, a simple lumbar support mechanism chair in which the waist is automatically supported by the weight when sitting can be simply configured. At this time, if a valve is provided at an arbitrary position as in claim 4, it is possible to adjust to a comfortable cushion degree.

[0012]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a seat cushion according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an operation diagram

FIG. 4 is a sectional view showing an example of a chair incorporating the cushion body.

[Explanation of symbols]

1 ... cushion body for seat, 2 ... cushion body for seat,
3 cushion member for waist, 4 communication path, 5 foam material, 7 airtight sheet, 8 valve, 10 chair, 11
... the seat, 12 ... the back.

Claims (4)

[Claims] 1. A seat cushion body comprising a cushion portion for a seat for supporting a buttocks when sitting and a cushion portion for a waist for supporting a waist, wherein the cushion portion for the seat and the cushion portion for the waist are continuous. It is configured as a foam enclosure in which the periphery of the foam material having air bubbles is covered with an airtight sheet and the interior is sealed, and the sealed interiors of the respective foam enclosures are communicated via a communication path. Cushion body for seat. 2. A seat cushion according to claim 1, wherein a valve for sucking / exhausting air inside the sealed portion is provided at an arbitrary position in the foam enclosure or the communication passage. Cushion body. 3. A seat in which a foam encapsulant enclosing the surroundings of a foam material having open cells with an airtight sheet and hermetically sealing the interior is provided at least at a position corresponding to the buttocks, and a periphery of the foam material having open cells. A foam enclosure in which the inside is sealed by enclosing the foam with an airtight sheet is provided at least at a back portion provided at a location corresponding to the waist, and a communication path for communicating the sealed interior of each foam enclosure with each other. A chair with a seat cushion. 4. A chair incorporating the cushioning body for a seat according to claim 3, wherein a valve for sucking / exhausting air inside the seal is provided at an arbitrary position in the foam enclosure or the communication passage. A chair incorporating a cushioning body for a seat, characterized in that: