JPS5937077Y2 - Vehicle seat frame - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a vehicle seat frame.
Particularly in seat frames on which blind springs are stretched, the seat can withstand the strong tensile load associated with tensioning the blind springs, eliminates the feeling of bottoming out from the blind springs, and provides a good usability. The purpose is to provide a seat frame that will

Conventionally, the seat frame of a vehicle seat has a spring installed between flanges integrally formed on the upper end of a flat side wall, so when the weight of the occupant is applied and the tensile load increases, the peripheral wall moves inward. This causes a tilting deformity,
The stress caused by the above-mentioned load is concentrated, and the seat frame has a drawback that it is easily damaged from the spring attachment site.

Therefore, the seat frame is made of a relatively thick steel plate to prevent these deformations, which goes against the idea of saving materials and reducing weight. A structure is used in which a reinforcing rib C is formed on the side wall of the spring attachment part of a, and the hook of the spring e is locked to the four surfaces of the flange that coincide with the top of the reinforcing rib C. The seat frame a is now composed of a steel plate.

However, in this type of seat frame a, when the winding end e' on the locking side of the spring e falls down as shown by the two-dot chain line, it comes into contact with the side wall, and not only does it cause a feeling of bottoming out, This is a cause of abnormal noise, which is particularly undesirable in the case of blind springs.

Furthermore, in recent years, as resin frames have become widespread, the frame structure has become a problem, and an attempt has been made to provide a seat frame that is lightweight, strong, and comfortable to use.

That is, the seat frame of the present invention continuously forms large and small reinforcing ribs on the side wall of the seat frame with a step that lowers outward in the middle, and a coil spring in which a blind spring is stretched between the frames. The hook is hooked to the small rib, and the winding end on the hook side is brought into contact with the end of the large rib to support the coil spring at an angle in the direction of the seat surface.

Hereinafter, one embodiment of the seat frame of the present invention will be described with reference to the drawings. FIG. 2 is a perspective view of the seat frame, and FIG. 3 is a perspective view of the main parts thereof.

The seat frame 1 of the automobile seat is formed by pressing a steel plate, and has an inner edge 3 and an upper edge continuous to the lower edge of the peripheral wall 2, which is formed into a substantially rectangular shape by opposing side walls 2a, 2a1, front wall 2b, and rear wall 2c. Continuing from the edge, the above side wall 2a72at2b)
A peripheral edge 4 is formed which is bent back to the outside of 2c, and the peripheral edge 4
and side walls 2a, 2a.

An appropriate gap is formed between 2b and 2c.

Opposed step reinforcing ribs 5, 5 are formed at several locations on the side walls 2a, 2a, and the step reinforcing ribs 5 are formed from the inner edge 3 to the side wall 2a, A small rib 7 that lies obliquely between the large rib 6 extending substantially parallel to the side wall 2a and the side wall 2a with a step E at the starting end of the upper end 6 of the dog rib 6.
A concave portion 8 is formed at the top of the large rib 6 toward the small rib 7, and the small rib 7
A locking hole 9 is bored at the lower end of the holder.

A flag-shaped spring 10 is stretched between the side walls 2a, 2a of the seat frame 1 having the above configuration via a coil spring 11. Both hooks 11a of the coil spring 11,
11a are respectively hooked between the side cords 10a of the flag-shaped spring 10 and the locking holes 3 of the step reinforcing ribs 5.

At this time, each coil spring 11 is connected to the step reinforcing rib 5.
The lower side of the side winding end 11b comes into contact with the recess 8 formed in the upper end 6a of the large rib 6, and the hook 11a on the side cord 10a locking side is supported obliquely toward the sheet surface direction (
(See FIG. 4) The flag-shaped spring 10 is tensioned and supported by the tension of the coil spring 11 and the repulsion caused by the deflection.

In the figure, 12 is a slide rail provided on the lower surface of the seat frame 1, and 13 is a hinge bracket for attaching the back frame. A seat pad 14 made of polyurethane or the like is placed on the top surface of the screen spring 10, and a skin material 15 is covered. At the same time, the edge 15a of the skin material 15 is inserted into the gap between the peripheral edge 4 and coated.

In the seat of an automobile or the like having the above structure, the blind spring 10 supporting the seat pad 14 is supported by the coil spring 11.
Since it is supported near the upper end of the side wall 2a of the seat frame 1, the amount of the seat pad 14 used is reduced, the weight is reduced, and at the same time, the feeling of bottoming out of the blind spring 10 is eliminated. be.

Further, each coil spring 11 on which the flag-shaped spring 10 is stretched is tilted and supported in the direction of the seat surface by a stepped reinforcing rib 5 provided on the side wall 2a.

Therefore, in the flag-shaped spring 10, the tensile elasticity of the coil spring 11 and the restoring force elasticity accompanying the bending deformation act together to provide a pleasant elastic feeling.

Furthermore, in the seat frame 1 of the present invention, the stepped reinforcing ribs 5 are formed in the portion where the blind spring 10 is stretched, extending from the inner edge 3 to the side wall 2a, so even if the steel plate of the seat frame 1 is made relatively thin, the side wall 2a This prevents the parts from collapsing inward, and accidents such as damage due to stress concentration at the parts can be avoided.

In addition, the seat frame 1 of the present invention can provide sufficient rigidity to the stretched portion of the blind spring 10, so it can be molded with synthetic resin, and a seat frame made of reinforced resin with a similar structure can be used. can be provided.

As explained above, since the seat frame of the present invention can be constructed with a thin steel plate or resin frame, it is possible not only to reduce the weight of the seat but also to improve the coil spring tilt. Since the flag-shaped spring is held in the opposite direction, the flag-shaped spring can be held above the frame surface, making it possible to make the seat pad thinner, and at the same time, the coil spring is held in a repulsive manner, making the vehicle comfortable to use. The practical effects of the present invention are extremely significant.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, a vehicle seat frame, and FIG. 1 is a cross-sectional view of the main parts of a conventional seat frame.
Fig. 2 is a perspective view of the seat frame of the present invention, Fig. 3 is a perspective view of the main part thereof, and Fig. 4 is a sectional view of the main part in the upright state. 1... Seat frame, 2... Peripheral wall,
2 a. 2b, 2c...Side wall, 3...Inner edge, 4
...Peripheral edge, 5...Step reinforcement rib, 6.
...Large ribs, 7...Small ribs, 8...
... recess, 9 ... locking hole, 10 ... flag spring, 11 ... coil spring, 14 ...
...Seat pad, 15...Skin material.

Claims (1)

[Scope of utility model registration request] In a vehicle seat frame in which a blind spring is stretched around a substantially rectangular frame, a large rib is provided on a side wall of the frame frame and extends from an inner edge continuously to a lower edge of the side wall to a part of the side wall. , a plurality of step reinforcing ribs are formed extending from the upper end of the dog rib toward the upper end of the side wall and consisting of a small rib configured with a step difference from the dog rib, and a plurality of step reinforcing ribs are formed between the blind spring and the frame. The hook part of each coil spring to be tensioned is locked to the small rib, the winding end of the hook part is brought into contact with the upper end surface of the large rib, the coil spring is held obliquely upward, and the coil spring is held diagonally upward. A vehicle seat frame characterized by having a spring stretched between frame frames.