JPH0633869Y2 - Seat cushion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seat cushion used in a vehicle such as an automobile, and in particular, it has sufficient cushioning property even when a pad which is a cushion body is thin. Regarding seat cushions that can be used.

[Prior Art and Problems to Be Solved] When the vehicle height of the vehicle is low, the thickness of the pad is reduced because the interior of the vehicle becomes narrower when a thick pad is attached.

However, the cushioning property of the seat cushion of an automobile has a correlation with the thickness of the pad, and when the pad is thick, a sufficient amount of bending can be secured,
When it is thin, the amount of flexure is insufficient and the cushioning property deteriorates.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a seat cushion that enables the cushioning property of a thin pad to be supplemented by a spring body and that the cushioning property of the thin pad can be maintained sufficiently. And

[Means for Solving the Problems] To achieve the above object, the present invention provides a seat cushion in which a pad receiver is attached to a cushion frame via a spring body, and the pad is placed on the pad receiver. The body is composed of a torsion bar whose one end is fixed to the cushion frame, and the pad receiving body is attached to the other end of the torsion bar in a state where an initial load is applied, and the other end side of the torsion bar A feature is that a horizontal direction displacement absorbing mechanism associated with the rotational deformation of the torsion bar is set in an engaging portion with the pad receiving body.

[Operation] The torsion bar has a fixed end on the cushion frame side, and an initial load is applied thereto, and the pad receiver side serves as the operation end. When a load is applied to the pad, the pad flexes, and then the load acts on the torsion bar from the pad receiver, which causes the torsion bar to flex, so that the seat cushion maintains the cushioning property due to the flexing amount of the pad and the torsion bar. It

[Embodiment] FIG. 1 shows an overall structure of an embodiment of the present invention, in which a side frame 1, an upper rail 5 and a lower rail 6 constitute a cushion frame. The lower rail 6 is fixed on the floor of the vehicle body, and the upper rail 5 is slidable in the longitudinal direction of the lower rail 5. The sliding movement of the upper rail 5 is locked by a seat adjuster mechanism (not shown), and the seat cushion is positioned in the front-rear direction when seated. The side frame 1 is bent in an “L” shape and integrally fixed to the upper surface of the upper rail 5. These side frames 1, upper rails 5 and lower rails 6
A cushion frame is formed by forming a pair on the left and right, and a pad receiver 3 is arranged between the left and right side frames 1. The pad receiver 3 is a pad (not shown)
Is placed, and the four corners are torsion bar 2
The pad is supported while being lifted from the vehicle body floor by being connected to the side frame 1 via. In the torsion bar 2, the tip of the long portion 2a is bent into a substantially U shape to form a short portion 2b parallel to the long portion 2a, and
The rear end 2a is bent toward the short portion 2b side at a substantially right angle to form a locking end 2c.

Each torsion bar 2 has a locking end 2c locked in a locking hole 1b formed in the side frame 1 and a long portion.
2a is attached to the outer surface of the side frame 1 by a fastener 4 while allowing a twist. In this attached state, the tip of each torsion bar 2 is inserted through the slits 1a formed at the front and rear ends of the side frame 1 so that the short portion 2b is located on the pad receiving body 3 side. Pad receiver 3
And are connected. Such a torsion bar 2 is attached to the side frame 1 by applying a predetermined initial load, and the structure thereof will be described with reference to FIG.
In the figure, a ring pipe 7 is attached to a corner of the pad receiver 3, and a short portion 2b of the torsion bar 2 is engaged and loosely inserted in the ring pipe 7. The loose insertion gap of the engaging portion at this time acts as a horizontal displacement absorbing mechanism when the torsion bar 2 is rotationally deformed, and absorbs the horizontal displacement due to the rotation of the torsion bar 2. Also, the stopper 4
A stopper 8 is fixed to the upper part of the device by screwing or the like. As shown by the chain line C in the figure, the torsion bar 2 is in an upward state to some extent as shown by a chain line C in the figure. The bar 2 is attached with an initial load applied.

In the above configuration, when a load acts by sitting,
First, the pad bends, and then the load of the torsion bar 2 acts via the pad receiver 3. This load causes the torsion bar having an initial load to bend, but since the torsion bar is given the initial load, the amount of bending is large, and the amount of bending of the pad and the torsion bar as a whole increases. Therefore, even if a thin pad is used, the cushioning property of the entire seat cushion can be maintained.

FIG. 3 is a load-deflection characteristic curve. Characteristic curves A1 and A2 show the present embodiment, and characteristic curve B shows a conventional example using only thin pads. In the present embodiment, the characteristic curve A1 uses a pad with large deflection, and after passing through the bending region of the pad, the amount of deflection increases with a gentle gradient.
The cushioning property is increasing. On the other hand, the characteristic curve A2
Uses a pad with a small deflection. In this case, the amount of deflection of the torsion bar up to the initial load is small, but the amount of deflection of the torsion bar can be increased to improve riding comfort.

[Advantage of Invention] As described above, according to the present invention, since the pad receiving body on which the pad is placed is supported by the torsion bar to which the initial load is applied, even if the pad is thin, its cushioning property depends on the deflection of the torsion bar. It can be supplemented and the cushioning property of the entire seat cushion can be maintained. In addition, since the horizontal displacement absorption mechanism associated with the rotational deformation of the torsion bar is set, the cushioning function due to the torsional deformation of the torsion bar is relentlessly exerted, and an excellent seat cushion without a feeling of bottoming can be obtained. .

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, FIG. 2 is a front view showing a mounting structure of a torsion bar, and FIG. 3 is a characteristic diagram of a bending amount with respect to a load. 1 ... Side frame (cushion frame), 2 ... Torsion bar, 2a, 2b ... End of torsion bar, 3 ... Pad receiver.

Claims (1)

[Scope of utility model registration request] 1. A seat cushion in which a pad receiver is attached to a cushion frame via a spring body, and a pad is placed on the pad receiver, wherein the spring body has one end fixed to the cushion frame. The pad receiving body is attached to the other end of the torsion bar in the state where the initial load is applied to the torsion bar, and the engaging portion of the other end side of the torsion bar and the pad receiving body of the torsion bar A seat cushion having a horizontal displacement absorption mechanism associated with rotational deformation.