JPH04200410A - Seat device - Google Patents

Abstract

PURPOSE:To obtain a supporting structure of an excellently pleasent and comfort able seat, by supporting a driver sitting on the seat with a plane supporting material. CONSTITUTION:A plurality of ribs 1a laterally extending in the seat are provided every appropriate interval in the supporting panel 1. The seating part 7 and the back side 8 of the seat are provided on the supporting panel 1 and the seat cushion frame 6. The arms 2b-5b of torsion bars 2,3 and 4,5 and the supporting panel 1 are displaced to the solid-line state when a driver sits on the seat 7 although they are in the two dot-chained line before he sits on the seat. Torsion bars 2, 3 and 4, 5 and the second arms 2b-5b are arranged so that the load direction by the driver's body 9 against the above bars and arms is a more perpendicular elastic deforming direction than that of initial seated state. And hence, it is possible to make lower the spring constant of the seat plane on the stable seating, compared with the initial seating condition of the driver and further to remove the contact feeling with the bottom, which spoils driver's sitting sense.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support structure for seats used in vehicles, homes, offices, etc.

[Prior Art] Conventionally, it has been known to provide a seat, that is, a frame of the seat, with an S spring, as shown in, for example, Japanese Utility Model Application Publication No. 59-130562.

In such a conventional configuration, the amount of deflection of the S spring surface is small, and the spring constant of the seat surface is low when the load is low, and the spring constant is high when the load is high. The disadvantage is that the spring constant of the surface is high, giving the occupants a sense of bottoming out and resulting in poor cushioning.

On the other hand, a method of configuring the seat elastic body with a coil spring or configuring a steel wire three-dimensionally was proposed in JP-A-62-2
This is known from Japanese Patent No. 36511, but there are problems in that the spring structure is complicated and requires three-dimensional space.

Further, in a seat structured to support an occupant using a linear spring as described above, the occupant may sense the linear spring as a foreign object. In order to prevent this problem, there is a drawback that a thick and dense band material must be used in combination.

This results in disadvantages in terms of space and seat weight.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a support structure for a seat that eliminates the above-mentioned conventional problems and provides excellent comfort, with little fatigue even when sitting for a long time.

[Means to solve the problem]

The present invention is based on the i! The present invention relates to a seat device having a substantially rectangular seat cushion frame installed on a floor, a support panel supported by the seat cushion frame, and a seat portion supported by the support panel and the seat cushion frame. , at least one of the front end and the rear end of the support panel is connected to the sorting frame by at least two torsion bars, and the torsion bar has a first arm fixed to the note cushioning frame at one end. , a second arm is fixed to the support panel at the other end, the second arm is formed to be vertically flexible with respect to the first arm, and the support panel has a lateral direction. The problem was solved by a seat device characterized in that a plurality of ribs extending in the longitudinal direction are provided at appropriate intervals in the longitudinal direction, and the support panel has bending elasticity in the longitudinal direction and bending rigidity in the lateral direction.

[Function] According to the present invention, one or both of the front end and the rear end of the support panel are connected to the seat cushion frame by two torsion bars, and both ends of each torsion bar are fixed to the seat cushion frame and the support panel. Because
Both ends of the support panel can easily bend vertically relative to the seat cushion frame, and since the support panel itself has a plurality of ribs extending laterally, it has bending elasticity in the front-rear direction and can bend freely. However, since it has ribs in the lateral direction, it has bending rigidity. Therefore, it has good cushioning properties,
However, a sheet device with good stability was obtained.

〔Example〕

The details of the present invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 to 3, the support panel 1 is provided with a plurality of ribs 1a extending in the lateral direction of the seat at appropriate intervals in the longitudinal direction, and the support panel 1 is It is formed as an elastic body that has bending rigidity in the lateral direction and bending elasticity only in the front-back direction.

The support baffle 1 is connected to the seat cushion frame 6 by front torsion bars 2 and 3 and rear torsion bars 4 and 5.
and is supported by the notebook frame 6.

The seat cushion frame 6 has hook parts 6a, 6 near the left and right ends at positions corresponding to the front end of the support panel 1.
b is provided, and one of the first arm 2a provided at one end of the front torsion bar 2 and the first arm 3a provided at one end of the front torsion bar 3 is attached to the hook portion 6a near the right end (
In the illustrated example, the first arm 2a is fixed to the hook portion 6a), and the other arm is fixed to the hook portion 6b near the left end (in the illustrated example, the first arm 3a is fixed to the hook portion 6b).

The second arm 2b provided at the other end of the front torsion bar 2 has a side end opposite to the first arm 2a (the left end in the figure).
The second arm 3b provided at the other end of the front torsion bar 3 is locked to a locking portion provided on the support panel 1, and the second arm 3b provided at the other end of the front torsion bar 3 is
It is locked to a locking part provided on the support panel 1 at the side end opposite to the arm 3a (the right side end in the figure).

The front part of the support panel 1 can be moved up and down with respect to the seat cushion frame 6 by the action of the front torsion bars 2 and 30.

Furthermore, the seat cushion frame 6 is provided with a support panel l.
A hook portion 6 is provided near the left and right ends at positions corresponding to the rear end.
C26d is provided, and one of the first arm 4a provided at one end of the rear torsion bar 4 and the first arm 5a provided at one end of the rear torsion bar 5 connects to the hook portion 6 near the right end.
c (in the example shown, the first arm 4a is the hook part 6c),
The other is attached to the hook portion 6d near the left end (in the example shown, the first
The arm 5a is locked and fixed to the hook portion 6b.

The second arm 4b provided at the other end of the rear torsion bar 4 has a side end opposite to the first arm 4a (the left end in the figure).
The second arm 5b, which is provided at the other end of the front torsion bar 5, is locked to a locking portion provided on the support panel 1, and the second arm 5b provided at the other end of the front torsion bar 5 is
It is locked to a locking portion provided on the support panel 1 at the side end opposite to the arm 5a (the right side end in the figure).

Due to the action of the rear torsion bar 4.5, the rear part of the support panel 1 can be moved up and down with respect to the seat cushion frame 6.

Thus, the support panel l is attached to the seat cushion frame 6.
In contrast, it can easily bend elastically in the front and back, providing good cushioning properties, and has rigidity in the lateral direction, so you can sit on it stably.

As shown in FIG. 3, a seat seat portion 7 and a seat back portion 8 are provided on the support baffle 1 and the seat cushion frame 6. When this seat device is formed for use in a vehicle,
The support panel 1 and the arms 2b, 3b, 14b, and 5b of the torsion bars 2, 3, and 4.5 are in the state indicated by the chain double-dashed lines in the figure before the passenger is seated, but when the passenger is on the seat portion 7, When seated, the support panel 1 and the second arms 2b, 3b, 4b, 5b of the torsion bars 2, 3 and 4.5 are displaced to the state shown in solid lines.

When the occupant is seated, the occupant's body 9
The vehicle is arranged so that it is elastically deformed so that the direction of the load caused by the vehicle is more vertical than before the passenger is seated. For this reason, it is possible to set the spring constant of the seat surface to be low when the occupant is stably seated, compared to the initial stage when the occupant is seated, and it is possible to eliminate the feeling of the seat bottoming out, which impairs the occupant's sitting comfort.

Furthermore, when the occupant is seated, the support panel 1 deforms to follow the shape of the occupant's buttocks due to its elasticity in the front-rear direction, so that the pressure distribution from the seating surface applied to the occupant is free from localized high-pressure areas.
Since the pressure distribution changes smoothly, the occupant will not experience any unpleasant pain.

Another embodiment of the invention, shown in FIG.
．． The rear end of the support panel l is supported on the seat cushion frame 6 by using coil springs 11 and 12 instead of the support panel l. The support panel 1 having bending elasticity in the longitudinal direction and the front torsion bars 2 and 3 have characteristics similar to those of the embodiment shown in FIG.

FIG. 5 shows another embodiment of the support panel 1, in which a plate material is press-formed and ribs l'a are provided in the lateral direction, and this support panel 1' is different from the embodiment shown in FIG. It also has lateral rigidity and longitudinal elasticity.

〔effect〕

In the present invention, since the occupant seated on the seat is supported by the planar support, even if the pad material used in combination is thin and has a low density, it does not give the occupant a foreign body sensation.

Therefore, the seat portion of the seat can be made thin and lightweight.

Furthermore, since there are fewer components and ease of assembly, the cost reduction effect is also significant.

According to the present invention, the good sitting comfort that is always required for seats, especially seats used in vehicles, is ensured even when riding for long periods of time, and the fatigue of the occupants is reduced and the seating comfort and riding comfort are excellent. We got good seats.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the first embodiment, Figure 2 is an exploded perspective view of the first embodiment, Figure 3 is a sectional view of the first embodiment, and Figure 4 is the second embodiment.
FIG. 5 is a perspective view of the third embodiment. 1... Support panel 1a... Rib 2... Front torsion bar 2a... First arm 2b... No. 27-13...
...Front torsion bar 3a...17th bar 3b...27th bar 4.
...Rear torsion bar 4a...First arm 4b...Second arm 5.
...Rear torsion bar 5a...First arm 5b...Second arm 6.
...Seat cushion frame 6a, 6b, 6C16d...Function part 7...Seat seat part 8...Seat back agent Patent attorney Hideaki Kuwahara Fig. 4 Fig. 5 1''

Claims (1)

[Scope of Claims] A seat having a substantially rectangular seat cushion frame installed on a floor, a support panel supported by the seat cushion frame, and a seat portion supported by the support panel and the seat cushion frame. In the device, at least one of a front end and a rear end of the support panel is connected to the seat cushion frame by at least two torsion bars, and the torsion bar has a first arm fixed to the seat cushion frame at one end. and has a second arm fixed to the support panel at the other end, the second arm is formed to be able to bend vertically with respect to the first arm, and the support panel has a horizontal A seat device characterized in that a plurality of ribs extending in the direction are provided at appropriate intervals in the front-rear direction, and the support panel has bending elasticity in the front-rear direction and bending rigidity in the lateral direction.