JPH0324151Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Technical Field of the Invention>> This invention relates to improvements in vehicle seats, particularly seat back frames.

<<Prior art and its problems>> FIG. 4 shows the structure of a seat back frame of a conventional vehicle seat.

In the figure, 1 is a seatback frame formed by press molding into a box shape with a front opening, and 2 is a wire for hooking a pulling member provided along the width direction on the front side of the seatback frame 1. are each bent into an L-shape in the axial direction to form a crank shape as a whole, and are fixed to the front surface of the frame 1 by welding 3.

This wire 2 is for hooking the end of the trim sheet pulling member 4 shown by imaginary lines in the figure via a clip 5, and is provided at one location on the front surface of the seat back frame 1 or at two locations above and below.

However, with such a wire fixing structure, it takes a lot of man-hours to set it on the frame 1 and weld it during processing, and there are also problems such as the wire bending when the frame is transported.

In addition, with this structure, when the occupant sits deeply on the seat back, the wire prevents the occupant from sinking, giving a feeling of a foreign body to the contact area of the back, which is a factor in reducing ride comfort.

《Purpose of the invention》 This invention improves workability when attaching wires, prevents bending of wires during transportation, etc.
Furthermore, the purpose is to provide a comfortable ride.

<<Structure of the invention>> In order to achieve the above object, this invention is characterized in that a pair of bearing parts are formed in the frame, and both ends of the wire are rotatably supported by the bearing parts.

<<Embodiment of the invention>> FIG. 1 shows the structure of a seat back of a vehicle seat to which this invention is applied.

In the figure, reference numeral 14 denotes a wire for hooking a pulling member similar to the conventional wire, and both ends are bent into an L shape to form a crank shape as a whole.

In the figure, a pair of bearing brackets 12 facing each other on the left and right are erected on the front surface of the seat back frame 10 by press punching or the like, and both ends of the wire 14 are pivotally supported by each bearing bracket 12, so that the entire wire 14 is supported. is rotatably mounted.

The protruding end of the wire 14 from the bracket 12 has, as shown enlarged in FIGS. 1 and 2,
A torsion spring 16 is arranged. The torsion spring 16 has one end attached to the bracket 1.
2, the other end is fixed to the wire 14. In the state shown in the figure, the end of the wire 14 is located on the front side of the frame 10. In other words, the spring pressure of the torsion spring 16 is at its most stable point when the wire 14 is located on the front side.

When an external force is applied from this state, the torsion spring 16 is wound up or unwound, and in this state, it rotates in the direction of the arrow against the spring pressure.

FIG. 3 shows how the trim sheet 20 is arranged on the seat back frame 10 configured as described above, and the trim sheet 20 is attached to the wire 14 as in the conventional case.
A seat bag is formed by hooking a pulling member 0 through a clip, and this seat bag is further combined with a seat cushion 30 to form a seat s.

In the figure, when the occupant's back is tilted significantly toward the seat back, as indicated by the imaginary line, the wire rotates in the direction of the arrow, that is, toward the upper or lower side, to prevent interference with the occupant's back. ing. In addition, as the passenger moves, the wires move, allowing the occupant to sit deeper into the seat back, resulting in a more comfortable ride with better cushioning.

In the above embodiment, the wire 14 is biased to the front side by the torsion spring 16, but since the wire 14 is always kept horizontal by the pulling member, such a spring is , is not necessarily required, or may be biased forward by other spring means.

<<Effects of the invention>> As explained above in the embodiments, this invention can be achieved by punching out a pair of bearing brackets during press molding of the seat back frame, and supporting both ends of the wire in a rotatable manner. , easy to assemble.

Furthermore, if an external force is applied to the wire during transportation, the wire can escape to either side, thereby preventing bending or damage caused by the external force.

Furthermore, with this invention, when the occupant sits deeply on the seat back, the wire rotates to avoid this contact area, thereby increasing cushioning and providing a more comfortable ride.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the seat back frame according to this invention, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, Fig. 3 is an explanatory sectional view showing the state assembled on the seat, and Fig. 4 is a perspective view of the seat back frame according to the invention.
The figure is a perspective view showing the configuration of a seat back of a conventional vehicle seat. 10... Seat back frame, 12... Bearing bracket, 14... Wire for hanging the pull member.

Claims (1)

[Scope of utility model registration request] A vehicle seat in which a crank-shaped wire with both ends bent into an L-shape in the axial direction is attached to the front of a box-shaped seat back frame, and a pull member of a trim cover is hooked to this wire via a clip. A pair of bearing parts facing each other are formed by punching on the front surface of the frame, and the wire is rotatably attached by supporting both ends of the wire to each bearing part. vehicle seat.