JPH0439731Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a frame structure of a movable side support in a vehicle seat.

《Prior Art》 As a conventional technology of a vehicle seat equipped with a movable side support, for example, Japanese Utility Model Publication No. 57-24212,
There is a technique disclosed in Japanese Utility Model Application Publication No. 58-152155.

All of these technologies are used for seat back frames (the same concept applies to seat cushion frames).
A side support frame is rotatably provided on both sides of the
24212 (Japanese Utility Model Publication No. 24212) or left and right (Japanese Utility Model Publication No. 152155/1983), it is possible to obtain a comfortable posture according to the body shape.

Among these, the technique for adjusting the frame longitudinally mainly supports the side of the lumbar vertebrae and cannot be adjusted according to the side of the body, but the technique for adjusting the frame laterally can be variably set to a shape according to the side of the body.

The present invention mainly relates to the improvement of the latter movable side support that can be adjusted laterally.

<<Problems to be solved by the invention>> Fig. 4 shows a seat back equipped with side supports that can be adjusted from side to side.

In the figure, 1 is the main part of the seat bag, 2
are side support parts provided on the left and right sides of the main part 1. The side support part 2 has an inverted U-shape in cross section, and has a frame 3 made of a press-molded steel plate having the same shape provided therein, and is surrounded by a covering body 4 containing a cushioning material on the outer periphery. The frame 3 is configured to rotate left and right about a rotation center P by an adjustment mechanism (not shown).

However, with this structure, when the side support part 2 is tilted inward as shown by the imaginary line in the figure to restrain the body side part A, the arcuate surface of the side support part 2 may come into contact with the body side part A, resulting in line contact. .

In other words, the most comfortable position for the body is to hit the surface, but with this structure, depending on the adjustment position, there may be cases where it hits the line. Of course, due to the deformation of the buffer included in the mounting body 4, the deformation will not be as extreme as shown in the figure. However, even with the absorption of the cushioning material, the body pressure distribution is extremely different between the line contact area and the surrounding area, which causes a feeling of a foreign body and doubles the fatigue caused by staying in the same position for a long period of time.

The purpose of this invention is to improve sitting comfort by making the side support contact the side of the body.

<Means for Solving the Problems> In order to achieve the above object, this invention provides a movable side support that is rotatably attached to both sides of the frame of a vehicle seat so that the body side support position can be variably set. The apparatus is characterized in that the inner surface of the frame forming the body-side support surface has a curved shape expanding outward, and an air mat capable of supplying and discharging indoor air is disposed on the body-side support surface.

<<Operation>> Since the inner surface of the frame is curved according to the body side, the side support contacts the body side at any rotation angle.

In addition, by arranging an air mat that can adjust the supply and discharge of indoor air on the body side support surface, the thickness of the air mat makes the side support part appear approximately inverted U-shaped in cross section, similar to the previous side support part, and the body side It also has the function of increasing followability in response to changes in posture relative to the body.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

Fig. 1 is a sectional view of a seat back of a vehicle seat according to an embodiment of the invention, Fig. 2 is a perspective view showing a side support frame of the seat back, and Fig. 3 is a perspective view showing a side support frame of the seat back.
The figure is a sectional view of the main part of FIG. 1.

In the figure, 10 is the main part of the seat bag;
Reference numeral 12 denotes side support parts provided on the left and right sides of the main part 10. The side support part 12 includes a side support frame 14 that rotates left and right around a rotation center P by an adjustment mechanism (not shown), and a covering material 1 that includes a cushioning material that surrounds the outer periphery of the support frame 14.
It consists of 6.

The support frame 14 is made of a molded plastic or steel plate, and has an arc shape along the vertical direction as shown in FIG.
The body side support surface 18, ie, the inner surface, is a curved surface corresponding to the circular arc of the body side part. Further, an air mat 30 is arranged on the body side support surface 18. The air mat 30 has the function of increasing the thickness of the cushioning material, so that the appearance of the side support part 12 has a substantially inverted U-shaped cross section similar to the conventional side support part, and the air mat 30 has a function of increasing the thickness of the cushioning material. This air mat also has the function of increasing followability in response to changes in posture, and at one end of this air mat there is a hose 32 that communicates with an air supply and drainage pump (not shown).
is connected.

Therefore, when air is introduced into the interior of the air mat 30 through the hose, the air mat 30 expands, and the inside of the side support portion 12 has a substantially inverted U-shaped cross section. Furthermore, when the air inside the air mat 30 is removed, the curved shape of the body-side support surface 18 of the support frame 14 approaches. As described above, a comfortable state can be achieved by adjusting the indoor air supply and discharge of the air mat 30 according to the change in the posture of the side support portion 12. Further, even when the air mat 30 is fixed, since the body side support surface 18 has a curved shape, the air mat 30 does not shift.

When the side support part 12 with this configuration is tilted inward as shown by the imaginary line in FIG. 1 to restrain the body side part A,
The cushioning material at the contact area 20 is greatly deformed and moves along the curved surface shape of the support frame 14 at the body side A.
will be supported in a planar manner.

<<Effects of the invention>> As is clear from the description of each of the embodiments above, according to this invention, at any adjustment position of the side support part, the contact of the side support part against the side of the body becomes face contact, so that the body pressure distribution is improved. Equalizes and improves seating comfort. In addition, even if G is applied to the side while driving, the sides of the body can be supported by the surface, so
The cushioning properties against impact are also extremely high.

In addition, the present invention has an air mat that can adjust the supply and exhaust of indoor air on the body side support surface, so that when air is introduced into the air mat's interior, the air mat expands, and the inside of the side support part is shaped like an inverted U.
When the air inside the air mat is let out, the shape approaches the curved shape of the body side support surface of the support frame. will be able to achieve a state of ease. Further, even when the air mat is fixed, since the body side support surface has a curved shape, the air mat does not shift.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a seat back of a vehicle seat with an air mat removed according to a first embodiment of this invention, Fig. 2 is a perspective view showing a side support frame of the same seat back, and Fig. 3 is a main part of an embodiment of this invention. FIG. 4 is a sectional view of a seat back of a conventional vehicle seat. 12...Side support part, 14...Side support frame, 18...Body side support surface, 30...
Air mat, A... Side part of the body.

Claims (1)

[Scope of utility model registration request] In a movable side support device that is rotatably attached to both sides of a frame of a vehicle seat so that the body side support position can be variably set, the inner surface forming the body side support surface of the frame is curved outwardly. What is claimed is: 1. A movable side support device for a vehicle seat, characterized in that an air mat is arranged on the body side support surface to adjust the supply and discharge of indoor air.