JPH032199Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a perforated headrest for a vehicle seat.

<Prior Art> A perforated headrest is attached to the upper part of a seat back 2 of a seat 1 via a stay 3, as shown in FIG. 4, for example. The perforated headrest 4 has a substantially rectangular pipe frame 5 therein, and a stay 3 is fixed to the lower horizontal part of the pipe frame 5.

Generally, in Japan, vehicle seats must be subjected to headrest strength tests (static and dynamic) and seat back rear impact tests stipulated in Article 22, Paragraphs 4 and 7 of the Safety Standards, and must meet the standards. Must be.

In the headrest static strength test, as shown in Fig. 5, the headform 6 of the testing machine is placed 65 mm below the upper end of the headrest 4, and the standard point R corresponding to the hip point is placed on the headform 6.
A predetermined load is applied so that a moment is generated around
This is a test to determine the distance h (102 mm or less).

In the seat back rear impact test, as shown in Figure 6, the head form 6 was
When a predetermined impact load is applied from a direction perpendicular to the tangent line drawn from the reference point R to the rear surface of the headrest 4, the deceleration of the headform 6 is maintained at the specified value (continuously for a period of 3 ms or more). This is a test to determine whether the product satisfies the requirements (not exceeding 80G).

<Problems to be solved by the invention> However, when conducting such a test, a problem occurs when the headrest is a headrest with a hole. This is because, in the headrest static strength test, the load direction of the headform 6 is determined to be perpendicular to the corrected torso line MTL or in the circumferential direction around point R, whereas the rotational fulcrum of the seat back 2 is Since it is below point R, as a load is applied to the headform 6, the headform 6 will enter the hole in the headrest 4, and the displacement h will become larger and exceed the specified value (102 mm). It's about putting it away.

In addition, in the seatback rear impact test,
Since the headform 6 directly hits the pipe frame 5 in the headrest 4, the deceleration of the headform 6 may exceed the specified value (80G, 3ms or less).

Therefore, in a headrest static strength test, it is desirable to prevent the headform from entering the perforated portion of the headrest, and in a seatback rear impact test, it is desirable to configure the headrest so that the deceleration of the headform is small. It is hoped that

Therefore, an object of this invention is to provide a perforated headrest with an improved structure that fully satisfies safety standards.

<Means for Solving the Problems> The perforated headrest according to this invention is characterized in that a portion of the upper horizontal portion of the pipe frame within the headrest is bent downward to integrally form a protrusion.

<Function> In the headrest static strength test, the protrusion provided on the pipe frame within the headrest prevents the headform from entering the perforated portion of the headrest, so the amount of headform displacement is reduced. In addition, in the seatback rear impact test, the protrusion provided on the pipe frame buckles to absorb the impact and reduce the deceleration of the headform.

<Example> FIG. 1 shows an example of this invention. The headrest 10 has a substantially rectangular pipe frame 11 inside, and a pad 12 surrounds the pipe frame 11.
It is covered with the epidermis 13 through the skin. A pair of stays 14 are fixed downward to the lower horizontal portion 11a of the pipe frame 11. Further, the upper horizontal portion 11b of the pipe frame 11 has a protruding portion 15 formed by bending the intermediate portion downward in a zigzag shape.
are integrally formed. A pad 12 is formed around such a pipe frame assembly by insert molding.

The pipe frame 11 may be a cylindrical pipe or a rectangular pipe. Further, as shown in FIG. 2, only one protrusion 15 may be provided at the center of the upper horizontal portion 11b of the pipe frame 11, or it may be provided in a V-shape as shown in FIG. 3, or in a semicircle. You may also set it up.

When performing a headrest static strength test on such a perforated headrest 10, the headform can be received by the protrusion 15;
The head foam is prevented from entering the perforated portion of the head rest 10. Further, during the seatback rear impact test, the protrusion 15 buckles to absorb the impact of the headform.

<Effects of the invention> As described above, the perforated headrest according to this invention has a projecting part formed by bending a part of the upper horizontal part of the internal pipe frame downward. In addition to being able to accurately measure the amount of displacement h, it is also possible to effectively prevent the seat occupant's head from tilting backwards in the event of a rear-end collision. Furthermore, in the seatback rear impact test, the impact can be absorbed by the buckling of the pipe frame, so the face and forehead of the rear occupant can be effectively protected in the event of a frontal collision. Furthermore, the pipe frame can be formed by simply bending using commercially available products, thereby reducing costs.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional schematic perspective view showing one embodiment of this invention, FIG. 2 is a front view of a frame in another embodiment of this invention, and FIG. 3 is a schematic perspective view of another embodiment of this invention. A front view of the frame, FIG. 4 is a perspective view of a vehicle seat equipped with a perforated headrest, FIG. 5 is a schematic explanatory diagram of a headrest static strength test, and FIG. 6 is a schematic explanatory diagram of a seatback rear impact test. It is. DESCRIPTION OF SYMBOLS 10... Hole head rest, 11... Pipe frame, 11b... Upper horizontal part, 12... Pad, 13... Skin, 14... Stay, 15... Protrusion part.

Claims (1)

[Scope of utility model registration request] A perforated headrest having a substantially rectangular pipe frame inside, the perforated headrest having a protruding part integrally formed by bending a part of an upper horizontal part of the pipe frame downward.