JPH038119Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in cushioning devices for vehicles, particularly automobile seats.

The comfort of a vehicle seat is determined mainly by the elastic performance of the support body, which is made up of the seat skin, foamed elastic material, zigzag springs, etc. In particular, the elastic modulus of the support body varies depending on the tensioning means, so the stiffness of the seat This has the greatest effect on riding comfort.

The stiffness of the support in conventional seats is determined based on the standard human body, so people who are relatively light in weight will feel hard and people who are heavy will feel soft. However, it has the disadvantage that the riding comfort varies depending on the individual.

In recent years, devices that can adjust the stiffness of the support have been developed, but these devices have drawbacks such as complex mechanisms and troublesome adjustments.Furthermore, changes in the stiffness of the support can cause seat The overall balance was disrupted, resulting in a loss of lateral pressure and hold, which actually worsened the ride comfort.

This idea was created in view of the above problems.
This simple structure eliminates changes in riding comfort caused by differences in the weight of the occupants.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a cushioning device for a vehicle seat to which the present invention is applied, in which a frame 1 includes both side frames 1a and 1b, a front frame 1c, and a rear frame 1d each having a U-shaped cross section.
It is formed into a substantially rectangular shape. Both sides frame 1
A first elastic support 2 is stretched over the upper surfaces of a and 1b, and this first elastic support 2 is supported by a zigzag spring 3.
a, 3b, 3c, with both ends attached to both side frames 1
Locking members 4a, 4b provided at the upper surface ends of a, 1b,
4c, and the zigzag springs 3a, 3b,
3c are stretched parallel to each other.

On the other hand, a second
This second elastic support body 5 is made up of zigzag springs 6a, 6b, and its both ends are engaged with locking members 7a, 7b provided at the bottom ends of both side frames 1a, 1b. The zigzag spring 6a is disposed at an intermediate position between zigzag springs 3a and 3b, and the zigzag spring 6b is disposed at an intermediate position between zigzag springs 3b and 3c, and they are stretched in parallel so that they do not overlap with each other.

In this way, the frame 1 has zigzag springs 3a, 3
This cushion device is provided with a first elastic support body 2 consisting of b and 3c and a second elastic support body 5 consisting of zigzag springs 6a and 6b, and is mainly applied to the seat part of a seat, but can also be applied to the backrest part. is also possible.

Further, the spring constants of the zigzag springs 3a, 3b, 3c constituting the first elastic support body 2 and the spring constants of the zigzag springs 6a, 6b constituting the second elastic support body 5 may be the same or different. But it's okay. The spring constant can be set appropriately according to the desired riding comfort.

The spring body constituting the elastic support body may be a band-shaped spring made of rubber or fabric, or a diaphragm spring formed by supporting the periphery of a rubber plate. Furthermore, the above spring bodies may be used in combination with each other.

The cushion device formed as described above has a second
As shown in the figures and FIG. 3, a foamed elastic body 8 is placed on top of the cushion device, covered with a skin 9, and used as a seat. When an occupant sits on this seat, if the initial load is small, the first elastic support 2 will be bent via the skin 9 and the foamed elastic body 8, as shown in FIG. When the load increases further, as shown in FIG. 3, the second elastic support body 5 also flexes at the same time to support the load of the occupant.

The load-deflection curve of the cushion device according to the present invention is shown in FIG. If we take the load p on the vertical axis and the deflection δ on the horizontal axis, we get a diagram AB. When the passenger is seated, the supporting force of the first elastic support is small, so line diagram A
If a larger load is applied, the first elastic support and the second elastic support work together, and the supporting force increases, and in the range of line B, a soft feel is provided. This will support the ship and the crew.

As described above, the present invention provides a first spring consisting of a plurality of zigzag springs on the upper surface of the frame constituting the seat.
This is a cushioning device for a vehicle in which an elastic support body is stretched, and a second elastic support body made of a plurality of zigzag springs is stretched on the lower surface of the frame. Although the elastic supports are independent of each other, they work together, creating a seat that feels soft on the surface but firm and supportive on the inside, creating the most ideal comfortable seat. It becomes a cushioning device. In addition, when the first elastic support is bent, the second elastic support is arranged so that it does not overlap with the bent first elastic support. It is possible to prevent the generation of abnormal noises without body contact. Further, when a large load is applied, the foamed elastic body also joins to the second elastic support, so that the bonding area of the support to the foamed elastic body increases. Therefore, substantially the entire bottom surface of the elastic foam is supported, which not only prevents local deformation and abrasion of the elastic foam, but also improves sitting comfort.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a cushion device according to the present invention, Figs. 2 and 3 are sectional views of a seat to which the cushion device according to the present invention is applied, and Fig. 4 is a load-deflection diagram of the cushion device according to the present invention. be. 1... Frame, 2... First elastic support, 5
...Second elastic support.

Claims (1)

[Scope of utility model registration request] In a cushioning device for a vehicle seat on which a foamed elastic body is placed, a plurality of first elastic supports are stretched in parallel at intervals on the upper surface of the seat frame,
A plurality of second elastic supports are provided on the lower surface of the seat frame at intermediate positions between the plurality of first elastic supports, in parallel with the first elastic bodies, so that the first elastic bodies are A cushion device for a vehicle seat, which prevents the first elastic body and the second elastic body from overlapping each other when bent.