JPH032198Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention supports a seat frame for a seat cushion with a U-shaped cross section from the left and right sides via tension springs, and more specifically supports the seat body of a vehicle seat. The present invention relates to an improvement in a support structure for a vehicle seat, which is formed by horizontally stretching a support made of a flex wire body.

(Prior Art) Conventionally, in this type of support structure for a vehicle seat, a support 7 made of a flex wire body supporting a seat body is inserted into left and right holes 4 in the upper surface 2 of a seat frame 1 having a U-shaped cross section. It was constructed by horizontally tensioning a tension spring 11 (hereinafter simply referred to as a spring) (FIG. 4).

(Problems to be Solved by the Invention) Therefore, the spring 11 normally has tension acting in a substantially horizontal direction, and most of the stress is in the horizontal direction, and the stress in the vertical direction is negligible. When an occupant takes a seat in such a state, the moment the occupant takes the seat, the spring is in a nearly horizontal direction, and as mentioned above, the vertical stress is extremely small, so the occupant feels uneasy because he or she cannot feel the response or feeling of being seated. It is something.

To improve this, Utility Model 57-81660
In this publication, a tension rod is used to set the spring at an angle in advance.

However, in this case, since the tension rod pulls the spring downward, the initial setting position of the support becomes low, and there is a risk that the support will come into contact with the bottom structure when the car body bounces, impairing the cushioning feel. .

In addition, as another improvement example, in the publication of Utility Model Application Publication No. 54-151609, in addition to the spring that acts in the horizontal direction, an elevating mechanism is provided, and the support is suspended diagonally from above by the spring, and the elevating mechanism The seat pressure can be freely adjusted by adjusting it up and down.

However, this structure increases the stress variably, and generally once the stress magnitude is set, there is no need to change it much, and variable structures are expensive compared to the needs in this case. Not economical.

An object of the present invention is to provide a support structure for a vehicle seat that can economically solve the problem of insufficient responsiveness and seating sensation when sitting.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention is designed to maintain the hip point of the seat body, that is, the rear half of the support that supports the rear half on which a large load is applied, to a sufficient height while maintaining an appropriate height. In order to apply stress to the seat frame, upwardly protruding side frames are provided on the upper surface of the left and right rear halves of the seat frame, and the rear halves of the support are stretched diagonally from a high position using springs. However, the front half of the support is suspended almost horizontally from a hole in the top of the seat frame using springs, just like before.

In addition, both front and rear protruding tips of the support are housed inside the side of the U-shaped cross section of the seat frame, and normally they are in contact with the upper inner side of the seat frame with appropriate force using the tension of the spring from above. are kept.
Further, even when a large load is applied by sitting, the tip is housed and held inside the lower part of the seat frame having a U-shaped cross section, thereby maintaining stability.

(Function) Since the rear half of the support is diagonally suspended from a high position on the side frame, the stress of the spring appropriately maintains a component force in the vertical direction. Since the front and rearward protruding tips of the support are housed inside the U-shaped section of the seat frame, the tips can be brought into contact with the inside of the upper part of the seat frame and stabilized by the force of the spring.

By setting the initial stress in the vertical direction of the spring to an appropriate constant value, it is possible to ensure a responsive and seated feeling at the moment of seating, and to apply stress proportional to the load. It is something that can be obtained.

In addition, because the tip is housed inside the seat frame surrounded by the upper, side, and lower parts, the vertical and longitudinal movements of the support are appropriately restricted and stability is maintained even under large changes in load. be able to.

The front half of the support is suspended almost horizontally by a spring from a hole in the upper part of the seat frame, but this method is sufficient because it supports the knees and does not require much stress.

(Example) An example of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a seat frame, which has a U-shaped cross section with an upper portion 2, side portions 9, and lower portion 15. In the upper part 2 of the seat frame 1, holes 4 are provided at appropriate intervals in the front half 3, and side frames 6 are attached to the rear half 5 so as to protrude upward.

Reference numeral 7 denotes a support, which is made up of vertical and horizontal flex wire bodies and elastically supports the seat body.
Both front and rear protruding end portions 8 of the support 7 are accommodated in an inner side portion 10 of the seat frame 1 surrounded by the upper portion 2, side portions 9, and lower portion 15 in a U-shape.

11 is a tension spring (hereinafter simply referred to as a spring)
The support 7 is elastically stretched, and the support front half 12 is held in a substantially horizontal state by springs 11 through holes 4 provided at appropriate intervals in the upper part 2 of the front half 3 of the seat frame 1. (FIGS. 1 and 3), and the support rear half 13 is stretched diagonally from the side frame 6 with springs 11 (FIGS. 1 and 2).

Generally, the stress when seating acts in the vertical direction, and its magnitude is expressed as the sinθ of the spring stress (Figures 2 and 3).When the spring is oriented horizontally, the stress is the minimum,
Maximum when vertical. Therefore, in the front half 12 of the support 7, the spring 11 is almost horizontal and the stress is small, but this is fine because it supports the knee and does not require much stress.The rear half 13 is the hip point and carries most of the body weight. Since it will support the spring 1, it is necessary to take a large stress in the vertical direction.
1 is provided diagonally.

Another reason for making the springs 11 oblique to each other is to prevent the support 7 from swinging from side to side using two horizontal stresses in different directions.

The side frame 6 is provided to protrude upward from the seat frame 1 to sufficiently maintain the normal height of the support 7 suspended by the spring 11 so as not to impair the cushioning effect.

As described above, the front end portion 8 of the support 7 that protrudes forward and backward is accommodated in the inner side portion 10 of the seat frame 1 surrounded by the upper portion 2, the side portions 9, and the lower portion 15, and the rear half portion 13 of the support Since the support is suspended diagonally from above by springs 11, strictly speaking, the protruding tip 8 of the support abuts against the inner side 14 of the upper part 2 of the seat frame with an appropriate constant pressing force due to the tension of the spring 11. This means that

The magnitude of this contact force is important in determining the suitability of the responsiveness and seating feeling the moment the occupant takes a seat, and should be determined after careful consideration.

(Effects of the idea) (1) Regarding the support stress at the hip point, we installed a side frame above the seat frame and stretched the support with springs from diagonally above to increase the stress in the vertical direction. By bringing the front and rear tips into contact with the inside of the upper part of the frame, a stable and constant initial stress is set, ensuring a reliable response and seating feeling when the occupant is seated.

(2) Since the support has a structure in which the front and rear tips are in contact with the inside of the upper part of the frame, the height of the support during normal conditions can be ensured, and the cushioning effect can be maintained.

(3) The rear half of the support was constructed to be stretched diagonally from the side frame, making it possible to economically obtain vertical stress.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is an explanatory view of the main part of Fig. 1, Fig. 3 is an explanatory view of another main part of Fig. 1, and Fig. 4 is a perspective view of the conventional example. It is a diagram. In the figure, 1 is a seat frame, 6 is a side frame, 7 is a support, 8 is a tip part of 7, 10 is an inside part of 1, 11 is a tension spring, and 13 is a rear part of 7.

Claims (1)

[Scope of utility model registration request] In a support structure for a vehicle seat in which a support is horizontally stretched from the left and right sides of a seat frame for a seat cushion having a U-shaped cross section via tension springs, the rear half of the support is provided so as to protrude above the seat frame. The front and rear ends of the support are housed and held inside the U-shaped cross section of the seat frame, and the rear half of the support is stretched diagonally to the side frame. A support structure for a vehicle seat characterized by being supported by a suspended tension spring.