JPH09262149A - Car seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car seat of such a construction that the surfaces of a seat cushion and a seat back form a continuous horizontal plane when the full reclined condition is established. SOLUTION: A car seat concerned is composed of a seat cushion 10 supported on both sides of the front part rotatably round a hinge pin 12 and a seat back 20 which is supported on both sides of the lower part by an upper arm 20b installed rotatably round another hinge pin 13. The seat cushion 10 is equipped with a pair of cylindrical members 30 having an axis running fore and aft while the seat back 20 is installed rotatably, wherein a pair of rod members 40 are inserted through the cylindrical members 30 slidably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining seat of a vehicle seat, and more particularly to a surface of a seat cushion and a surface of a seat back that are substantially continuous when the seat back is in a fully reclining state. The present invention relates to a sheet having various functions.

[0002]

2. Description of the Related Art In a conventional reclining seat, as shown in FIG. 4, when the normal use state (a) is changed to the full reclining state (b), first, the seat cushion 1 and the seat back 2 are separated from each other. Since there is a step between them and the seat surface of the seat cushion 1 is usually inclined rearward and downward, it is difficult to form a continuous surface with the seat cushion 1 even if the seat back 2 becomes flat. I won't.

[0003]

By the way, the problem of a step between the seat cushion 1 and the seat back 2 is that the hinge center for reclining the seat back 2, that is, the position of the rotating shaft 3 is adjusted to an appropriate height. It can be solved by lowering it and moving it backward by an appropriate distance. However, in order to correct the downward inclination of the seat cushion 1, the rear portion of the seat cushion 1 must be further lifted. That is, the two operations of first tilting the seat back 2 backward and then lifting the rear portion of the seat cushion 1 are required. An object of the present invention is to solve the above problems and provide a vehicle seat capable of performing the above two operations at once.

[0004]

According to the present invention, there is provided a seat cushion rotatably supported on both sides of a front portion of a seat cushion, the seat cushion being rotatable about a pair of lateral first pivot shafts attached to a vehicle body. A seat back supported at both lower sides by a pair of upper arms rotatably mounted around a pair of lateral second rotation shafts mounted on the vehicle body behind the one rotation shaft. In the vehicle seat, the seat cushion includes a guide member that is fixed at a position behind the first rotation shaft and in front of the second rotation shaft and that has a longitudinal axis. Rotatably attached to the seat back below the second rotation axis,
Further, a rod member slidably supported by the guide member is provided, and the seat back is rotated about the second rotation shaft, so that the seat cushion is fixed through the rod member and the guide member. It is characterized in that the seat back is rotated about the first rotation shaft in the opposite direction to the seat back.

In an embodiment, the guide member may be cylindrical and the rod member may be inserted into the cylinder.

Further, the guide member and the rod member may be provided in a pair of right and left, and the rod members may be slidably supported by the corresponding guide members.

Further, the seat back is turned around the second turning shaft, and the seat cushion is turned around the first turning shaft through the rod member and the guide member. By rotating in the opposite direction, the surface of the seat cushion and the surface of the seat back form a substantially continuous surface, and in this case, the surface of the seat cushion and the surface of the seat back are respectively horizontal. Can be.

[0008]

In the vehicle seat of the present invention, when the seat back is rotated about the second rotation shaft,
By interlocking the rod member rotatably attached to the seat back and the guide member fixed to the seat cushion, the seat cushion rotates about the first rotation axis in the opposite direction to the seat back. In this way, the operation of rotating the seat back and the operation of rotating the seat cushion in the opposite direction can be achieved at once by a very simple mechanism, that is, by interlocking the rod member and the guide member. Further, when the seat back is in a fully reclining state, it is possible to form a surface where the surface of the seat cushion and the surface of the seat back are substantially continuous and to set the surface to be horizontal.

[0009]

1 is a block diagram of a vehicle seat according to the present invention.
And FIG. In the figure, this vehicle seat includes a seat cushion 10 and a fully reclining seat back 20, and both the seat cushion 10 and the seat back 20 are attached to a vehicle body (not shown) via a pair of left and right seat slide mechanisms 11. Has been.

FIG. 1 shows a normal use state of the seat back 20, that is, a state of standing up. In the figure, the seat slide mechanism 11 includes lateral hinge pins (first rotation shafts) 12 supported by brackets 11a provided on the front upper side thereof. The seat cushion 10 is rotatably attached around a hinge pin 12 by a pair of brackets 10b provided on both lower sides of a front portion of a cushion panel 10a that constitutes a bottom portion of the seat cushion 10.

The seat slide mechanism 11 is also provided with a lateral hinge pin (second pivot shaft) 13 supported by a lower arm 11b provided on the upper side of the rear portion of the seat slide mechanism 11, respectively. The seat back 20 is rotatably attached around the hinge pins 13 under the pair of left and right upper arms 20b that support the back frame 20a constituting the skeleton from both sides of the lower part, and is operated by a reclining mechanism (not shown). A reclining seat back is configured.

At the bottom of the cushion panel 10a of the seat cushion 10, a pair of left and right cylindrical members (guide members) 30 are fixed by a support member to the bracket 10b, that is, behind the hinge pin 12 and in front of the hinge pin 13. The axis of the tubular member 30 extends in the front-rear direction of the vehicle. The tubular member can be formed of a plastic material such as polyacetal.

Back frame 2 of seat cushion 20
0a has arms 20c that extend integrally on both left and right sides below the hinge pin 13, and one end of a rod member 40 is attached so as to be rotatable around a horizontal hinge pin 20d provided at a lower portion of the arm 20c, Rod member 4
The other end of 0 extends forward and the corresponding tubular member 30
The tubular member 30 is slidably inserted into the rod member 4
It has a function of guiding 0. The rod member 40 can be formed of, for example, a steel material.

The operation of this seat will be described. From the state of FIG. 1, the hinge pin 1 is operated by the reclining mechanism.
When the seat back 20 is tilted backward around 3, the arm 20c integral with the back frame 20a rotates clockwise, whereby the rod member 40 projects forward and slides in the tubular member 30, As a result, the cushion panel 10a integrated with the tubular member 30 rotates counterclockwise around the hinge pin 12. As a result, when the seat back 20 is in a fully reclining state, as shown in FIG. 2, the seat surface 10c of the seat cushion 10 and the backrest surface 20e of the seat back 20 form horizontal and substantially continuous surfaces. To do.

As shown in FIG. 1, when the seat back 20 is erected, the seat surface 10 of the seat cushion 10 is in a standing state.
The angle formed by c with the horizontal plane is α, and the angle formed by the backrest surface of the seatback 20 with the vertical plane is β. When the seatback 20 is in the fully reclining state, as shown in FIG. 2, the seat surface 10c of the seat cushion 10 and the backrest surface 20e of the seatback 20 form horizontal and substantially continuous surfaces. First, while the seat back 20 is rotated clockwise from the upright state about the hinge pin 13 by the angle β, the lower end portion of the seat back 20 and the rear end portion of the seat cushion 10 do not interfere with each other, and It must rotate counterclockwise about hinge pin 12 by angle α and both stop at this position. Further, at this time, the seat surface 1 of the seat cushion 10
0c and the backrest surface 20e of the seat back 20 must form a substantially continuous surface. For these purposes, the position of the hinge pin 13 with respect to the hinge pin 12, the position of the tubular member 30, the direction of the axis, and the back frame 20a.
The position and the like of the hinge pin 20d in 8 may be appropriately set in advance.

As is apparent from the above description, in the seat of the present invention, when the seat back 20 is tilted rearward in the clockwise direction from the standing state by the reclining mechanism, the arm 20c integrated with the back frame 20a is rotated. The seat cushion 10 rotates counterclockwise around the hinge pin 12 and lifts up the rear portion of the seat cushion 10 by interlocking the rod member 40 that is movably attached with the tubular member 30 that is fixed to the cushion panel 10a. As described above, the operation of tilting the seat back 20 backward and the operation of lifting the rear portion of the seat cushion 10 are extremely simple mechanisms at a time, that is, the rod member 4
This can be achieved by linking 0 with the tubular member 30.

In this case, the position of the hinge pin 13 with respect to the hinge pin 12, the position of the tubular member 30 and the direction of the axis,
If the position of the hinge pin 20d in the back frame 20a is appropriately set in advance, the seat cushion 10
The seating surface 10c of the seat back 20e and the backrest surface 20e of the seat back 20 can form a substantially continuous surface, and this surface is horizontal as in the above-described embodiment and is appropriately inclined in the front-back direction. Can also be

In the above-mentioned embodiment, the guide member having the function of interlocking with and guiding the rod member 40 is the tubular member 30. However, the shape is not limited to the tubular shape, and the rod member 40 can be removed. An open ring shape may be used as long as it can be guided without a guide. Also, the tubular member 3
Although the 0 and the rod member 40 each include one pair on the left and right, in some cases, one pair may be provided to interlock them.

The vehicle seat of the present invention can be applied to both front and rear seats, and FIG. 3 shows an example in which it is applied to front and rear two-row full reclining seats. In this case, it is different from the front seat in that both the bracket 15 supporting the front portion of the rear seat cushion 14 and the lower arm 16 supporting the rear seat back 21 are directly fixed to the vehicle body floor. Since other structures and operations are the same as those in the above-described embodiment, detailed description will be omitted. However, when the present invention is applied to the front and rear seats in this way, the flat surface becomes wider, and thus the seat can be used like a bed.

[Brief description of drawings]

FIG. 1 is a schematic elevation view of a vehicle seat according to the present invention in a normal use state.

FIG. 2 is a schematic elevation view of the vehicle seat shown in FIG. 1 in a fully reclining state.

FIG. 3 is a schematic elevation view in a fully reclining state when the present invention is applied to front and rear vehicle seats.

FIG. 4A is an explanatory elevational view showing a conventional vehicle seat, FIG. 4A showing a normal use state, and FIG. 4B showing a full reclining state.

[Explanation of symbols]

1, 10, 14 ... Seat cushion, 2, 20, 21 ...
Seat back, 12 ... Hinge pin (first rotating shaft), 13
... hinge pin (second rotation axis), 20b ... upper arm,
30 ... Cylindrical member, 40 ... Rod member.

Claims (5)

[Claims] 1. A seat cushion supported on both sides of a front portion so as to be rotatable about a pair of lateral first pivots attached to a vehicle body, and a seat cushion behind the first pivots. A vehicle seat comprising a pair of upper arms rotatably attached to a pair of lateral second pivots attached to the vehicle body, and a seat back supported on both lower sides of the upper arm. The seat cushion includes a guide member fixed at a position behind the first rotation shaft and in front of the second rotation shaft and having an axis line in the front-rear direction, and the seat back with respect to the second rotation shaft. A rod member rotatably attached to the seat back below and slidably supported by the guide member, and by rotating the seat back around the second rotation shaft, The rod member and the moth A vehicle seat characterized in that the seat cushion is rotated about the first rotation shaft in the opposite direction to the seat back via an id member. 2. The vehicle seat according to claim 1, wherein the guide member is cylindrical and the rod member is inserted into the cylinder. 3. A pair of left and right guide members and a pair of rod members, each of which is slidably supported by the corresponding guide member. The vehicle seat described. 4. The seat back is rotated about the second rotation shaft, and the seat cushion is connected to the seat back about the first rotation shaft via the rod member and the guide member. The vehicle according to any one of claims 1 to 3, wherein the surface of the seat cushion and the surface of the seat back form a substantially continuous surface by rotating in the opposite direction. Sheet. 5. The vehicle seat according to claim 4, wherein the surface of the seat cushion and the surface of the seat back, which form a substantially continuous surface, are horizontal.