JPH023333Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat equipped with an air mat for adjusting the support pressure of each support part.

In recent years, various types of seats, particularly automobile seats, have been proposed and implemented in which the support pressure of the lumbar region and other areas can be adjusted according to the preferences of the seated person. A seat with a plate-shaped support placed on the seat and operated by various operating mechanisms was widely used, but in order to make the seat thinner and lighter, Air mats have been used in the past.

The first example of a seat equipped with this type of air mat is
This will be explained with reference to the drawings and FIG.

In the figure, 1 shows the seat back of the seat, and a plurality of S-shaped springs 3 for receiving pads are suspended between both sides of the seat frame 2 of this seat back 1, and a pad 4 is arranged on the front side of this spring. The surface is covered with an epidermis 5. and pad 4
A bag-shaped air mat 6 is arranged at a required part on the back side of the seat frame 2, that is, at a position corresponding to the lumbar region of the seated person. It is supported by a supporting spring 7.

By injecting air from an air pump (not shown) through the tube 8 of the air mat 6, the air mat 6 is expanded in the thickness direction, thereby expanding the surface of the seat back 1 and increasing the support pressure for the lumbar vertebrae. This is an attempt to make adjustments.

However, in this configuration, the support spring 7 has a certain degree of flexibility in order to obtain an appropriate feeling of deflection when seated, so if the tension of the skin 5 is stronger than that of the support spring 7, the air mat 6 As shown by the dotted chain line, the support spring 7 expands rearward, so the rearward deflection of the support spring 7 is large and the amount of change on the seat surface side is small. Although an attempt was made to increase the tension by tightening it more strongly than the receiving spring 3, the flexibility was reduced by that much, and as a result, the air mat 6 sometimes gave the seated person a feeling of being a foreign body.

The present invention has been developed in view of these points, and attempts to solve the above-mentioned problems by improving the support structure of the air mat.

That is, in order to achieve the above-mentioned object, the present invention provides a seat in which an air mat supported by a support spring is disposed on the back side of the pad, and the support pressure is adjusted by inflating the air mat. It is formed into a two-stage structure of a first support spring with high flexibility and a second support spring with low flexibility, and when the air mat is in a contracted state, the first support spring with high flexibility When the air mat is in an inflated state, the first support spring has greater flexibility and the second support spring has less flexibility. The purpose is to ensure that the sheet surface follows the expanded shape of the air mat and is thereby inflated.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3 to 5. Members corresponding to those of the conventional example shown in FIGS. 1 and 2 will be denoted by the same reference numerals, and their explanation will be omitted.

In this embodiment, the present invention is applied to a seat equipped with a lumbar support mechanism for adjusting the support pressure of the lumbar region, similar to the conventional example described above.

FIGS. 3 and 4 show a first embodiment of the present invention, and the seat cushion 11 of this seat has a support spring as a support member for supporting the air mat 6 in a two-stage structure. That is, the first support spring 12, which is formed to be highly flexible, is stretched between the lower portions of both sides of the seat frame 2 so as to correspond to approximately the center of the back side of the air mat 6. Second support springs 13, 13a, 13b are located rearward from the first support spring 12 at a required distance and have small flexibility.
are stretched so as to correspond to the upper and lower parts of the back side of the air mat 6, respectively.

An interpolation member 14 is arranged between the air mat 6 and the second support spring 13. This interpolation member 14 is made of a material such as a urethane slab or a palm lock and has approximately the same size as the air mat 6, and has a concave portion 15 in the center of the back side in the lateral direction.
The bottom of this recess 15 is thin and has a first support spring 12 at the bottom, and second support springs 13, 13a, 13b are located at the upper and lower parts of the recess 15 on the back side. They are brought into contact with each other. Note that as the material of the interposed member 14, a material that is difficult to be elastically deformed can also be used.

FIG. 5 shows a second embodiment of the present invention, in which the intervening member 14 has a shape that is reversed from that of the first embodiment, that is, a recess 15' is formed on the front side, and this is placed on the air mat 6 side. arranged so as to face each other, and this recess 1
A first support spring 12 is located within the air mat 5' and is brought into direct contact with the back side of the air mat 6. Note that the recessed portion 15' of the interposed member 14 in this embodiment may have a depth sufficient to escape the deflection of the first support spring 12.

In the seats of the first and second embodiments configured as described above, the air mat 6
When the air mat 6 is in the contracted state, the air mat 6 is supported by the highly flexible first support spring 12. Therefore, when a seating load is applied, the air mat 6 is easily bent together with the pad 4. The air mat 6 does not give a foreign body sensation to the person.

Furthermore, when air is injected into the air mat 6 from the up pump through the tube 8, the air mat 6 expands in the thickness direction, and at this time, the back side of the air mat 6 is connected to the highly flexible first support spring 12 via the intervening member 14. and second support springs 13, 13a, 1 with small flexibility, that is, with a large spring constant.
3b, the epidermis 5
The pad 4 expands forward against the tension of the pad 4 and the elasticity of the pad 4, and as a result, the pad 4 is pressed against the surface side of the air mat 6, causing the seat surface to bulge out forward, thereby reducing the support pressure of the lumbar vertebrae. Adjustments will be made (see dash-dotted lines in Figures 4 and 5).

In this example, the present invention is applied to a seat equipped with a lumbar support mechanism that adjusts the support pressure of the lumbar region, but it can also be applied to seats with other support adjustment mechanisms such as thigh support mechanism or side support mechanism. Of course it can be done.

As described above, according to the seat of the present invention, when the air mat is in the contracted state, the first
Since the air mat is supported by a supporting spring, a suitable feeling of flexibility can be obtained, and when the air mat is in an inflated state, the first support spring has a high flexibility and the second support spring has a low flexibility. Since it is supported by both springs, the seat surface is reliably inflated following the inflation state of the air mat, and the support pressure is adjusted, providing a comfortable seating feeling to the occupant in any case. be able to.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an example of a seat using a conventional air mat, Fig. 2 is a longitudinal sectional side view of the main part of the same, and Fig. 3 is a first embodiment of the seat of the present invention. FIG. 4 is a longitudinal sectional side view of the main part of the same, and FIG. 5 is a longitudinal sectional side view of the main part showing the second embodiment. In the figure, 4 is a pad, 6 is an air mat, 12 is a first support spring, and 13 is a second support spring.

Claims (1)

[Claims for Utility Model Registration] An air mat is provided whose front surface is in contact with the back surface of the pad and whose back surface is supported by a support spring stretched over the seat frame, and the support pressure is adjusted by inflating the air mat. In the seat, the support spring includes a first support spring with greater flexibility and a second support spring with less flexibility, and the first support spring is located forward of the second spring. death,
The second support springs are arranged above and below the first support spring, and when the air mat is in a contracted state, it is supported by the first support spring, and when it is in an expanded state, it is supported by the first support spring. A seat characterized in that it is supported by a support spring and a second support spring.