JPS607241Y2 - Mechanism for folding the seat forward, etc. - Google Patents

Description

[Detailed description of the invention] This invention relates to a mechanism for folding the seat forward, etc.

Many automobile seats are designed so that the backrest can be folded forward relative to the cushion (for example, see Japanese Utility Model Application Publication No. 55-43918), but the present invention allows the backrest to be completely folded and inverted forward. In addition, the backrest can be folded backwards into a horizontal position to create a flat bed.

Next, the structure will be explained with reference to embodiments shown in the drawings.

The seat 1 is mainly composed of a cushion 2 and a backrest 3, and a rectangular leg 4 is fixed to the front end of the cushion 2.
The lower side portion 4a is rotatably attached to the floor 6 using a support fitting 5 to form a rotating portion 7.

A hinge lower plate 8 is attached to the side rear end 2a of the cushion 2.
is fixedly installed, and a hinge center plate 10 is rotatably connected thereto via a rotation pin 9.

Further, a hinge upper plate 12 fixedly attached to the lower end 3a of the side surface of the backrest 3 is rotatably connected to the hinge center plate 10 via a rotation pin 11.

A bracket 13 is fixed to the vehicle body side (not shown) so as to be parallel to the side surface of the hinge center plate 10.

A pin 14 is provided protrudingly coaxially with the pivot pin 9 of the hinge center plate 10, and a guide groove 15 is provided in the bracket 13 with the pivot portion 7 of the leg 4 as the center and a radius of the distance reaching the pin 14. The pin 14 is slidably inserted into this.

A pin 16 is further protruded from the hinge center plate 10, and a terminal end 15a of the guide groove 15 is attached to the bracket 13.
A guide groove 17 is provided with a radius corresponding to the distance from the pin 14 to the pin 16 and centered on the center position of the pin 14 that is accommodated in the
The pin 16 is slidably inserted into this.

In the above structure, since the pivot pin 9 and the pin 14 are arranged coaxially, the two parts may be integrally formed by penetrating the hinge center plate 10.

In addition, an escape groove 17 is provided at the end of the guide groove 17 as will be described later.
A is an extension.

Further, the mechanism of the present invention is used in conjunction with a reclining device (not shown) that can finely change the inclination angle of the backrest 3 with respect to the cushion 2, and the mechanism is used in combination with a reclining device (not shown) that can finely change the inclination angle of the backrest 3 with respect to the cushion 2. An operating lever 18 of the reclining device is disposed between them, and the angle between the hinge lower plate 8 and the hinge center plate 10 can be freely changed by this lever 18.

That is, when the backrest 3 is reclined by operating the lever 18 with the pin 16 housed in the guide groove 17, it can be locked at several reclined positions and when the backrest 3 is horizontally tilted backwards. It has become.

Next, the operating state of this embodiment will be explained with reference to FIG.

First, move backrest 3 forward, and then
and the leg 4 fixed thereto, a rotating part 7 provided on the floor 6.
When the pin 14 is rotated rearward about the hinge center plate 10, the pin 14 protruding from the hinge center plate 10 is inserted into the guide groove 15 of the bracket 13 and is housed in the terminal end 15a.

Next, when the backrest 3 is raised rearward, the hinge center plate 10 is rotated rearward via the rotation pin 11 connected to the hinge upper plate 12.

At this time, the hinge center plate 10 rotates around the rotation pin 9.

That is, since it rotates around the pin 14 housed in the terminal end 15a of the guide groove 15, the pin 16 protruding from the hinge center plate 10 is inserted into the guide groove 17 of the bracket 13.

When the hinge lower plate 8 and the hinge center plate 10 are locked in this state, the movement about the rotating portion 7 relative to the pin 16 is restricted by the guide groove 17, so that the entire seat is fixed.

FIG. 4 shows a state in which the backrest 3 is horizontally tilted backward.

First, when the hinge lower plate 8 and the hinge center plate 10 are unlocked from the state shown in FIG.

When the backrest 3 is further tilted backward, the pin 16 moves to the relief groove 17a and the terminal end 15a of the guide groove 15.
The pin 14 housed in the guide groove 15 slides along the guide groove 15 and is pulled out.

Then, at the position where the cushion 2 and backrest 3 are horizontal, the hinge lower plate 8 and the hinge center plate 1
0 is locked, the movement of the rotating portion 7 relative to the pin 16 is restricted by the relief groove 17a, so the entire seat is fixed in this state.

In this way, the upper surface of the backrest 3 comes to be continuous with the upper surface of the cushion 2, forming a flat bed.

FIG. 5 shows the state in which it is folded and can be stood upside down forward.

First, from the state shown in Figure 3, unlock the hinge plate and tilt the backrest 3 forward.

At this time, the pin 14 is at the terminal end 15a of the guide groove 15,
The pin 16 is removed from the guide groove 17, and the upper surface of the backrest 3 comes into complete contact with the upper surface of the cushion 2.

Next, if you rotate it forward around the rotation part 7, the cushion 2 and backrest 3 will be in the 2/ and 3/ positions.
Fold it completely and move forward into an inverted position.

The present invention is constructed as described above, and when the backrest is tilted back relative to the cushion, a flat bed is formed, making it comfortable to use, and the cushion and backrest can be completely folded. Since it is turned upside down, its volume is reduced and the empty space can be used effectively.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a seat provided with this mechanism, Fig. 2 is an enlarged perspective view of section A in Fig. 1, and Figs. FIG. 3 is a side view showing various states of the sheet as viewed from the direction of FIG. 1...Seat, 2.2'...Cushion, 2a...Side rear end, 3,3'...
・Backrest, 3a... lower end of side, 4...
...Leg, 4a...Lower side, 5...
Supporting metal fittings, 6...Floor, 7...Rotating part, butt...Hinge lower plate, 9...
Rotating pin, 10... Hinge center plate, 1
1... Rotating pin, 12... Hinge upper plate, 13... Bracket, 14...
...Pin, 15...Guide R115a...
... Termination part, 16 ... Zen, 17 ... Guide groove, 17a ... Relief groove, 18 ... Operation lever.

Claims (1)

[Scope of utility model registration request] In a seat where the backrest 3 can be folded forward or backward with respect to the cushion 2, a rotating part 7 that allows the cushion 2 to stand upside down forward is provided at the lower end of the leg 4 fixed to the front end of the cushion 2. A hinge center plate 10 is rotatably connected to a hinge lower plate 8 fixedly attached to the rear end of the side surface of the backrest 3 via a pivot pin 9. A hinge upper plate 12 fixedly attached to the lower end is rotatably connected, a pin 14 is provided protruding from the hinge center plate 10 coaxially with the pivot pin 9, and a bracket 13 fixedly attached to the vehicle body side is attached. A guide groove 15 whose radius is the distance from the rotating part 7 to the pin 14 is provided to allow the pin 14 to freely slide therethrough. A guide groove 17 centered on the pin 14 housed in the portion 15a and having a radius equal to the distance from the pin 14 to the pin 16 and an escape groove extending behind the guide groove 17 are provided so that the pin 16 can be freely slidably inserted therethrough. A mechanism that allows the seat to be folded forward.