JPH03117Y2 - - 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 head restraint 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 to the contact point of a tangent drawn from the reference point R to the rear surface of the headrest 4 from a direction perpendicular to the tangent,
This is a test to determine whether the deceleration of the headform 6 satisfies the specified value (do not exceed 80G continuously for 3ms or more).

<Problems to be solved by the invention> However, when performing such a test, a problem occurs when the headrest is a holed headrest. 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 is to put 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 problem> The perforated headrest according to this invention has a groove formed from below at approximately the center of the upper horizontal part of the pipe frame in the headrest, and a groove on both sides of the groove in the upper horizontal part. It is characterized by a protruding piece fixed to the lower side.

<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 concave groove provided in the pipe frame buckles and absorbs the impact, reducing the deceleration of the headform.

<Embodiment> FIG. 1 shows an embodiment 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, in the upper horizontal portion 11b of the pipe frame 11, a groove 15 is formed in the center from below, and a pair of protrusions 16 are fixed downward to both sides of the groove.
A pad 12 is formed around such a pipe frame assembly by insert molding.

As shown in FIG. 2, the pipe frame 11 is
It may be formed using a cylindrical pipe, and the third
As shown in the figure, a rectangular cylindrical pipe may be used. Further, the groove 15 may be a slit as shown in FIG. 2, or a hole or a crushing as shown in FIG. 3. The protruding piece 16 has a V shape as shown in the figure.
Both ends of the iron piece formed in the shape of a pipe frame 1
1 may be welded to the bottom of the pipe frame 11.
Only one end of a single metal piece may be welded to the pipe frame 11 if it has the same rigidity.

When a headrest static strength test is performed on such a perforated headrest 10, the headform can be received by the protruding piece 16, so that the headform is prevented from entering the perforated portion of the headrest 10. Further, during the seatback rear impact test, the concave groove 15 of the pipe frame 11 buckles to absorb the impact of the headform.

<Effects of the invention> As described above, the perforated headrest according to this invention has a concave groove formed from below at approximately the center of the upper horizontal part of the internal pipe frame, and
Since the protrusions were fixed to both sides of the protrusion facing downward, the amount of displacement h in the headrest static strength test was
In addition to being able to accurately measure the angle of the vehicle, 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, since the pipe frame can be molded using commercially available products, costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional schematic perspective view showing one embodiment of this invention, Fig. 2 is a perspective view of essential parts in one embodiment of this invention, and Fig. 3 is a main part of another embodiment of this invention. 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. FIG. 6 is a schematic explanatory diagram of a seat back rear impact test. It is. 10... Hole head rest, 11... Pipe frame, 11b... Upper horizontal part, 12... Pad, 13... Outer skin, 14... Stay, 15... Concave groove, 16... Protruding piece.

Claims (1)

[Scope of utility model registration request] The perforated head rest has a pipe frame formed in a substantially rectangular shape inside, and a groove is formed from below at approximately the center of the upper horizontal part of the pipe frame, and both sides of the groove of the upper horizontal part are formed. A perforated headrest characterized by a protruding piece fixed to the bottom of the headrest.