JPS5937078Y2 - vehicle seat - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle seat, and particularly to one in which a headrest is integrally formed with a seat back.

Conventionally, the headrest that is integrally formed with the seat back of a vehicle seat has been formed by joining a headrest panel to the upper side of the back frame, but the upper side of the back frame is flat, and the headrest is attached to this flat upper side. Since the lower edge of the panel is only joined horizontally in a straight line, the width of the joint in the vertical direction is extremely narrow, and when an impact is applied to the panel surface, bending force acts on the joint, causing the joint to bend. This has the disadvantage that the headrest part is easily deformed, such as when the headrest part is bent and deformed, or the joint part is damaged or peeled off, and the headrest part is easily deformed, especially when there is an impact from the rear, that is, when a passenger sitting in the rear seat collides with the headrest.

Therefore, the present invention solves the conventional drawbacks by increasing the joint width of the headrest panel to the back frame.
The headrest is strengthened and integrated with the seatback by increasing the joint retention force.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 shows the entire vehicle seat to which the present invention is applied, 2 is a seat cushion, 3 is a seat back, and this seat back 3 is equipped with a headrest 4 according to the present invention.

That is, the upper side 5a of the back frame 5 of the seat back 3 is formed into a chevron shape, and in the center part of this chevron-shaped upper side 5a,
The headrest panel 6 is joined.

At the center of the headrest panel 6, a bead 7 with a depth approximately equal to the diameter of the chevron-shaped upper side 5a of the HAC frame 5 is formed by expanding forward. Concave portion 7 along the upper half of the portion 5a
a, 7b are formed, and the lower edge portion 7c is spaced back and forth at approximately the same distance as the diameter of the lower edge side portions 6a, 6b of the headrest panel 6 and the frame upper side portion 5a.

The lower edge of this headrest panel 6 is attached to the back frame 5.
In the center of the chevron-shaped upper side 5a, both lower edges 6a,
6b is placed on the rear side and the bead lower edge 7c is placed on the front side, and the lower edges 6at6b and 7c are joined to the frame upper side 5a by spot welding.

When the headrest panel 6 is joined to the back frame 5 in this way, the vertical distance between the welding points W1 and W2 between the panel's lower edges 6a, 6b and the bead lower edge 7c with respect to the upper side 5a of the back frame 5. The center a is large, and each welding point W1. Since the W2 are scattered along the mountain shape of the upper frame portion 5a, the joint portion of the headrest panel 6 to the back frame 5 is enlarged.

In addition, 8 in the figure is a figure 8 spring stretched over the back frame 5.

In this example, the back frame 5 is made of tubular material and has a closed cross-sectional shape, but there is also a back frame that is formed in an inverted U shape and whose open parts are connected by connecting rods, or a back frame that is formed of a steel plate. It goes without saying that the headrest panel 6 can be joined to the above-mentioned parts by the above-described structure, and the welding is not limited to spot welding, and other bath welding methods may be used.

As described above, according to the present invention, the upper side of the back frame is shaped like a mountain, and the lower edge of the headrest panel, which is divided into multiple parts, is inserted into the mountain-shaped upper side from the front and rear sides and joined. The vertical distance between these joints is expanded to improve the joint strength of the headrest panel to the back frame, and the headrest panel can withstand not only shocks from the front side but also shocks applied from the rear side, especially from diagonally above the rear side. The headrest is integrated with the seat back in terms of strength, can reliably protect the seated person, and has the advantage of being simple in structure and easy to manufacture.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a vehicle seat to which the present invention is applied;
FIG. 2 is a perspective view of the back frame to which the headrest panel is joined, FIG. 3 is a front view of the main parts, and FIG. 4 is a side view of the main parts. 1 is a seat, 3 is a seat back, 4 is a headrest, 5 is a back frame, 5a is a chevron-shaped upper side, 6 is a headrest panel, 6at6b is a panel lower edge, 7 is a bead, 7
c is the lower edge of the bead.

Claims (1)

[Scope of utility model registration request] In a vehicle seat in which a headrest is integrally formed with a seat back, the upper side of the back frame is formed in a chevron shape, and the lower edge of the headrest panel is divided into a plurality of parts, and the headrest panel is shaped like a chevron of the bank frame. A vehicle seat comprising a headrest formed by inserting and joining the divided lower edge portion to the upper side portion from the front and rear sides.