JPS6234512A - Seat for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a vehicle seat in which a seat back is provided with a lumbar support and a side support as supports capable of exerting a holding feeling for a seated person.

(Prior Art) In general, this type of vehicle seat holds the seated person stably while the car is running, provides appropriate sitting comfort, and prevents fatigue even when seated for a long time. It is desired to reduce this as much as possible, and for this purpose support devices are attached to each part of the seat. and,
The most well-known examples of such support devices include lumbar supports that support the lower back of a seated person from the seat back side, and side supports that hold the seated person on both sides of the lumbar support.

(Problem to be Solved by the Invention) By the way, various configurations of such lumbar supports and side supports have been known in the past. The structure has a pair of left and right arms supported by elastic bodies such as springs on the end sides, whose rotation is adjusted by various cam members, etc., and the side support is a support frame using a gear mechanism etc. A structure was adopted that allowed for rotation. Each of the above-mentioned supports can be adapted to the body shape or preference of the seated person by adjusting the amount of bulge of the support portion outward from the seat by rotating the adjustment shaft, etc. This allows the occupant to obtain a stable sitting posture according to his/her preference, eliminates fatigue, and improves operability for the driver.

However, the problem with incorporating the lumbar support and side supports into the seat back at the same time as described above is that it is difficult to arrange them without interfering with each other, and it is difficult to avoid complicating the structure. Not only is this not possible, but the operating section, which is normally provided separately, has drawbacks such as requiring cumbersome and complicated operations by the seated person, so it is desired that some kind of countermeasure be taken.

The present invention was made in view of these circumstances, and
The lumbar support and side supports are efficiently incorporated and arranged inside the seat back with a simple configuration, and each support can be rotated freely and appropriately with a small operation force by simple operation, and the desired support shape can be adjusted. The objective is to obtain an inexpensive vehicle seat that can provide the following benefits.

(Means for Solving the Problems) In order to meet such demands, the vehicle seat according to the present invention is provided between two supporting bladders rotatably supported within the seat back. It has a ramp support that moves forward and backward toward the seat, and side supports that are rotatably supported by the seat back frame on both sides and bulge out toward the front of the seat. It is constructed of a large diameter shaft and a small diameter shaft that are rotatably combined with each other.

(Function) According to the present invention, the lumbar support and the side supports can be freely and appropriately adjusted by using the rotation operation shaft configured as a large and small triple shaft at the same location.

(Example) Hereinafter, the present invention will be explained in detail using an example shown in the drawings.

Figures 1 to 3 show an embodiment of a vehicle seat according to the present invention, and only show the seat back frame to which the main parts, such as a lumbar support and side supports, and their constituent parts are assembled. Other configurations are omitted.

In these figures, reference numeral 1 denotes a seat pack frame (not shown) that supports a seat pack, and 2.2 denotes a pair of left and right side plates provided toward the front of the seat on both sides of the frame. Inside 3.3 is a support portion that supports a headrest frame (not shown).

Now, according to the present invention, the support is rotatably supported on the pivot shaft 10.10 which is vertically supported between the side plates 2, 2 of the seat back and pivoted on the frame pieces 1a, la. A support spring 12.12 as a lumbar support is provided between the brackets 11.11 and moves forward and backward toward the front of the seat, and a support spring 12.12 is rotatably supported by the seat back frame l side on both sides and bulges out toward the front of the seat. 12. A side support 13.13 made of a pipe body integrally formed with the pivot shaft io, io, and a side support 13.13 formed integrally with the pivot shaft io; The rotating operation shafts 14 and 15 of i3 are characterized by being composed of a large diameter shaft and a small diameter shaft that are coaxially combined in a rotatable state with respect to each other.

In addition, 16.17 in the figure is the large and small rotation operation shaft 14.1.
The large and small operation knobs 18.19 fixedly installed on the outer ends of the rotation operation shaft 14.15 are screwed into threaded portions formed on the outer periphery of the rotation operation shaft 14.15, and are rotated on this shaft according to the amount of rotation thereof. The nut member 18 on the lumbar support side has arm portions 18a, 18a connected to the support bracket shaft ll side via lengths yt11a, lla. , has an arm 118b connected to the left and right connecting rods 20. Further, the nut member 19 on the side support side has arm portions 19a, 19a connected to eccentric long grooves 21a, 21a of the bracket 21 fixed on the pivot shaft to via holes 21a, 21a, It has an arm portion 19b to which the left and right connecting rods 22 are connected.

In such a configuration, by rotating the large-diameter operating shaft 14, the nut member 18 is moved, and thereby the left and right support brackets 11 and 11 (connecting rod 20) having the lumbar support spring 12 are moved. ) on the pivot axes io and to,
The lumbar support (12) can be expanded to the front of the seat.

Furthermore, when the small-diameter operation shaft 15 is rotated, the pivot shaft 10 to which the left and right side supports 13 are fixed is rotated by the nut member 19, which similarly moves in the axial direction. It will be easily understood that the side portion bulges out in front of the seat.

Note that the present invention is limited to the structure of the embodiment described above.

The shape and structure of each part can be modified as necessary.
You are free to make changes. For example, in the embodiment described above, the operation knobs 16 and 17 as operation means are provided on one side of the seat back, but the present invention is not limited to this, and the operation knobs 16 and 17 may be provided on both sides. Alternatively, an operating means having a lever configuration may be adopted.

(Effects of the Invention) As explained above, according to the vehicle seat according to the present invention, the lumbar support provided between the support brackets rotatably supported within the seatback and the seatback frame side on both sides thereof. The rotation operation shaft for the side support, which is rotatably supported by the side support, is composed of a large-diameter shaft and a small-diameter shaft that are coaxially combined in a rotatable state with respect to each other, resulting in a simple and inexpensive configuration. Despite this, the dual-axis structure of the operating section allows for easy and appropriate rotational adjustment of the lumbar support and side support, and allows the members that make up both supports to be adjusted appropriately without interference with each other. There are various excellent effects such as being able to be arranged.

[Brief explanation of the drawing]

The figure shows one embodiment of the vehicle seat according to the present invention, and shows the first embodiment of the vehicle seat according to the present invention.
The figure is a schematic perspective view showing the frame structure of the main parts, Fig. 2 is an enlarged view of the rotation operation shaft part, and Fig. 3 is an exploded view to explain the main parts of the lumbar support and side support structure. FIG. In the figure, 1... seat back frame of a vehicle seat;
2... Side plate, lO... Pivot shaft, 11...
・Support bracket, 12...Support spring as lumbar support, 13...Side sabot F
14.15...Rotation operation axis. Figure 1 Figure 2

Claims (1)

[Claims] A lumbar support is provided between support brackets that are rotatably supported within the seat back and moves forward and backward toward the front of the seat, and a lumbar support that is rotatably supported by the seat back frame on both sides and expands toward the front of the seat. What is claimed is: 1. A vehicle seat, comprising: a side support that extends from the vehicle; the rotating operation shafts of both supports are constituted by a large-diameter shaft and a small-diameter shaft that are coaxially combined in a rotatable state with respect to each other.