JPH0514571B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a seat suitable for use in automobiles, which can suitably accommodate both tall and short persons.

BACKGROUND TECHNOLOGY AND PROBLEMS There have already been proposals for seats used in automobile driver's seats, etc., in which the depth can be adjusted. Two types of seat cushions have been proposed: one in which the seat bag is moved back and forth relative to the seat cushion, and the other in which the seat cushion is divided into two parts and the front and rear directions can be adjusted.

However, the former configuration has disadvantages in terms of strength and also has the disadvantage of being prone to looseness. In addition, the latter configuration has disadvantages such as loss of continuity of the seating surface and poor seating comfort.

Purpose of the Invention In view of the above-mentioned points, the present invention provides a seat that has a relatively simple configuration and can be applied to both tall people (people with long legs) and short people (people with short legs).

SUMMARY OF THE INVENTION The present invention provides a front and rear rotating arm that can be rotated about the fulcrum and the rear fulcrum, respectively, which are attached to the front and rear parts of a bracket that extends in the front-rear direction. The free end is used as a front pivot point and a rear pivot point, and these pivot points are respectively pivoted to the front and rear parts of the cushion frame, and the front pivot point is selected at a position above the front pivot point, and the rear pivot point is By moving the seat cushion forward, the rear part of the seat cushion is lowered and the so-called hip point is lowered, making it suitable for tall people. By moving it backwards, the hip point is raised, making it suitable for short people.

Embodiment Hereinafter, an example of a sheet according to the present invention will be described with reference to the drawings. Since this example is formed symmetrically from side to side, one of the sheets will be explained, and the corresponding parts of the other will be shown with the same reference numerals.

Reference numeral 1 denotes a guide rail device, which extends in the front-rear direction, on which a bracket 2 is attached, which also extends in the front-rear direction. The bracket 2 can be moved back and forth, and by releasing the operating lever 3 at an arbitrary position, the bracket 2 is locked at that position again. Since such means are well known, detailed explanation thereof will be omitted.

At the front and rear of the bracket 2, a front pivot arm 6 and a rear pivot arm 7 are rotatably mounted on front and rear fulcrums, or shafts 4 and 5, respectively. In this case, the axis 4 of the rotating arm 6 is configured as a common axis (front link) extending between the left and right brackets 2, and the left and right front rotating arms 6
is rotationally integrated with respect to this common shaft 4. Here, the shaft 4 is pivotally attached to the bracket 2 so as to be located below the shaft 5. The free ends of the left and right rear rotating arms 7 are connected to each other by a rod 8.

A shaft 9 as a front pivot point is projected from the free end of the front rotating arm 6, and a mounting bracket 10 is further attached near the free end of the rear rotating arm 7 so as to be freely rotatable by a shaft 11. and is bent into an L-shape as a whole. A pin 12 is formed on this mounting bracket 10.

Reference numeral 13 denotes a cushion frame, which is shaped so that its rear part is lower than its front part so as to roughly follow the shape of the hips of a seated person. This cushion frame 13 is constructed separately from a seat back frame (not shown) without interlocking with it. Front and rear support pieces 14 and 15 are attached to the front and rear sides of the cushion frame 13, respectively, and both have through-holes 14 and 15.
6 and 17 are formed. The shaft 9 of the front rotating arm 6 is engaged in the through hole 16 of the support piece 14, and the pin 12 of the mounting bracket 10 is engaged in the through hole 17 of the support piece 15, respectively.

Further, as is clear from FIG. 2, when the front pivot point or axis 9 is selected to be located above and rearward of the front pivot point or axis 4, the rear pivot point or axis 11 is located at the rear pivot point or axis 4. That is, it is selected to be located below and at the rear of the axis 5.

Furthermore, teeth 18 centered on the common shaft 4 are formed on one of the left and right front rotating arms 6 (in the illustrated example, the right rotating arm), and a pinion 19 that meshes with the teeth 18 is formed on one of the left and right front rotating arms 6 (in the illustrated example, the right rotating arm). A position fixing device 20 having
is attached to bracket 2. This device 2
0 will become clear from what will be described later. 21 is a handle or knob of this device 20.

Although the position fixing device 20 is provided on the front rotating arm 6 side in this example, it may be provided on the rear rotating arm 7 side.

The operation of such a configuration will be explained. now,
It is assumed that the cushion frame 13 is in the position shown by the solid line in FIG. In this state, the handle 21
, rotate the spindle 19, and then release the handle 21. As a result, the spindle 19 is rotated by a predetermined amount and then locked in that rotational position, so that it will not be rotated by external force. The spindle 19 can be rotated by operating the handle 21 again. In this case, the spindle 19 can be unlocked by, for example, pushing or pulling the handle 21 in its axial direction, and since this configuration is not directly related to the gist of the present invention, its explanation will be omitted.

As described above, by rotating the spindle 19, the front rotating arm 6 rotates via the teeth 18. If this is now rotated counterclockwise in FIG. 2, the cushion frame 13 will be projected forward as shown by the dotted line and also lifted slightly upward. Correspondingly, the rear pivot arm 7 is rotated clockwise about the fulcrum, or shaft 5, so that its pivot point, or shaft 11, moves forward and slightly lowers. That is, when the cushion frame 13 moves forward, its front part is slightly raised and its rear part is slightly lowered. Therefore, since the so-called hip point of the seated person is lowered and the knees are raised at the same time, this case is suitable for use by tall persons. Conversely, when moving the cushion frame 13 backwards,
Since the situation is opposite to that described above, this case is suitable for use by short people.

Effects of the Invention As explained above, according to the present invention, by moving the cushion frame 13 forward or backward relative to the bracket 2, the hip point can be lowered or raised. It has the characteristic that it can be adapted to each person appropriately.

Furthermore, since the cushion frame 13 is made separately from the seat back frame, the inclination angle of the seat back frame side does not change when the cushion frame 13 is moved, and it is necessary to readjust its angular position. Not at all.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an example of the swing cushion sheet according to the present invention, and FIG. 2 is a side view showing the swing cushion sheet in use. 2 is a bracket, 6 and 7 are front and rear rotation arms, and 9 and 11 are front and rear pivot points.

Claims (1)

[Claims] 1. A seat cushion and a seat back are separately attached to a bilaterally symmetrical bracket extending in the longitudinal direction, and a front rotation arm and a rear rotation arm are attached to the front and rear parts of this bracket. The front rotating arm is pivoted so as to be rotatable about a fulcrum and a rear fulcrum, respectively, and the fulcrum of the front rotating arm is set to be located below the fulcrum of the rear rotating arm. The arm is pivotally supported at the lower part to the bracket and the upper part to the cushion frame, and the rear rotating arm is pivotally supported at the upper part to the bracket and the lower part to the cushion frame. A swing cushion seat characterized in that either one of the rotating arms can be rotated and adjusted by a position fixing device.