JPS641865Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat structure, and more specifically, to a seat structure in which a seat bag is connected to a seat cushion via a reclining mechanism so as to be tiltable forward and backward.

2. Description of the Related Art Conventionally, there has been a seat whose seat back can be tilted forward and backward using a reclining mechanism, and the seat back can be placed in a fully flat state so that the seat can be used as a bed. In this case, when the seat bag is tilted sufficiently backwards, a level difference occurs between the lower end of the seat bag and the rear end of the seat cushion, which often deteriorates the feel of the bed. For this reason, the reclining mechanism has been formed using a two-stage link or the like, or the seat cushion and the seat back have been formed in series by means such as raising the rear end of the seat cushion.

However, when height adjustment is performed using a reclining mechanism, the structure becomes extremely complicated and the assembly work is complicated and expensive, and when the rear end of the seat cushion is raised, the structure is also complicated. Moreover, since the entire seat cushion is raised, a large amount of force is required for operation, and the operation cannot be performed easily and quickly. Furthermore, in order to improve the holding feeling, the seat had different heights for the center and side parts, and when the seat was set fully flat, the difference in height caused a feeling of discomfort.

The object of the present invention is to provide a seat structure which allows the center of the width of the seat cushion to be easily raised when the seat back is tilted backward, has a simple structure and reliable operation, and is free from the risk of a step being generated between the center of the rear end of the seat cushion and the lower end of the seat back when the seat cushion and the seat back are in a fully flat state.
This will be described in detail below with reference to the drawings.

FIG. 1 schematically shows an embodiment of the seat structure according to the present invention, and this seat structure has a reclining mechanism 4 attached to the rear of one side of a seat cushion frame 3, and an arm of the reclining mechanism. A seat back frame 5 is attached to 4a, and the seat back frame 5 is connected so as to be tiltable back and forth by operating an operating handle 4b.

A continuous so-called S-shaped spring 6 is attached to the seatback frame 5, and the S-shaped spring 6,
The seat back frame 5 is covered with a skin material via a pad material to form a seat back 2.
A substantially U-shaped frame receiving portion 8 is formed at the center of the lower horizontal rod 7 of the seat back frame 5, and this frame receiving portion 8 is inclined forward and downward from the lower end position of the seat back frame 5 when viewed from the side. It is formed by

An S-shaped spring 12 is attached to the seat cushion frame 3.
A cushion spring 11 consisting of a wire 13 and a wire 13 is attached, and the wire 13 is disposed above the outer peripheral edge of the seat cushion 1. A front end portion 14a of a plate-shaped movable frame 14 is pivotally supported at the center position of the front side of this wire 13,
The rear end portion 14b is the horizontal portion 8a of the frame receiving portion 8.
It is placed on. That is, the movable frame 14 is formed at the upper center in the width direction of the seat cushion frame 3 and extends in the front-rear direction. In this embodiment, the movable frame 14 is shown as being formed of a linear plate-like body when viewed from the side.
A curved surface can be formed as appropriate so that it can be brought into close contact with the body in a seated state, and it is not limited to a plate-like body, but may be formed from a net-like body, a woven fabric, or the like.

A cushion pad 16 is placed on the upper part of the cushion spring 11 of the seat cushion frame 3. As shown in FIG. It is formed to be placed on the frame 14. Also, both sides 16
b and the rear height of the central portion 16a are formed higher on both side portions 16b. The cushion pad 16 is covered with a skin material, and the end of the skin material is fixed to the seat cushion frame 3 with a clip or the like. The cushion pad 16 may be entirely covered with a skin material, or both side portions 16b and center portion 16a may be covered individually.

The structure of one embodiment of the seat structure according to the present invention has been described above, and its operation will now be explained with reference to FIGS. 3 and 4.

As shown in FIG. 3, when the seat bag 2 is in the seating position as a normal seat, a frame receiving part 8 provided at the lower part of the seat bag frame 5
The horizontal portion 8a is located below the rear portion of the seat cushion 1, and the seat cushion 1 forms a normal seating surface. From this state, when the operating handle 4b of the reclining mechanism 4 is operated to tilt the seat back 2 backward into a fully flat state, the frame receiving portion 8 rotates together with the seat back frame 5, as shown in FIG. The horizontal portion 8a of the frame receiving portion 8 rotates upward, and at the time of this rotation, the rear end portion 14b of the movable frame 14 placed on the horizontal portion 8a is pulled upward, and the movable frame 14 is rotated upward. The front end portion 14a rotates around the wire 13. Therefore, the rear part of the central part 16a of the cushion pad 16 placed on the movable frame 14 is similarly pulled upward, and the central part of the seat cushion 1 in the width direction and the central part of the rear end of the seat cushion 1 are separated. Both sides can be made to have substantially the same height, and the seat cushion 1 and the seat bag 2 can be used as a series of simple beds.

According to the seat structure according to the present invention, when the seat back is tilted backward, the rear part of the center part in the width direction of the seat cushion can be easily raised, and when the seat cushion and the seat back are in a fully flat state. There is no risk of creating a step between the rear end of the seat cushion and the lower end of the seat back, and the conventional reclining mechanism can be used as is without any additional mechanism. Compared to a structure in which the entire rear end of the seat cushion is raised, it is possible to obtain a seat structure that is significantly simpler in structure and easier to operate.

[Brief explanation of drawings]

Fig. 1 is a perspective view schematically showing an embodiment of the seat structure according to the present invention, Fig. 2 is a perspective view of a cushion pad, and Figs. 3 and 4 respectively illustrate the operation of the present invention. 4 is an explanatory side view of the seated state, and FIG. 4 is an explanatory side view of the fully flat state. In the figure, 1... Seat cushion, 2... Seat bag, 3... Seat cushion frame, 4...
...Reclining mechanism, 5... Seat back frame, 8... Frame receiver, 11... Cushion spring, 14... Movable frame.

Claims (1)

[Scope of utility model registration request] In a seat structure in which a seat back is connected to a seat cushion via a reclining mechanism so as to be tiltable back and forth, a movable frame extending in the front-rear direction is provided at the upper center in the width direction of the seat cushion frame, and Nearby, a frame receiving part is formed so as to be inclined forward and downward from the lower end position of the seat back frame when viewed from the side, and the rear end side of the movable frame is attached to the frame receiving part to tilt the seat back backward. The seat structure is characterized in that the rear end side of the movable frame is pulled up by the frame receiving part and the rear of the center part in the width direction of the seat cushion is pulled up.