JPH04352906A - Head rest having hetero-hardness - Google Patents

Abstract

PURPOSE:To provide a head rest free from a crack at the corner of a gap between a soft urethane section and a body urethane section, even when a cover is applied to conceal a head rest manufactured with a molding die. CONSTITUTION:A rectangular soft urethane section 11 is laid within a rectangular recess 15 formed in a body urethane section 12, so that the side 11b of the soft urethane section 11 forms a gap with the side wall 15a of the recess 15. The bottom of the recess 15 is solidified with the lower side 11a of the section 11 in contact therewith via an impregnation process. Also, the body urethane section 12 is projected to form an impregnated and solidified layer 13 at least in a part of the gap between the side wall 15a of the recess 15 and the side 11b of the soft urethane section 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an automobile headrest and an automobile seat.

0002

[Prior Art] A headrest 50 of different hardness integrally molded with soft urethane shown in FIG. 6 has a lower mold 61 and an upper mold 62 shown in FIG.
A rectangular partition wall 63 of the lower mold 61 of the mold 60 consisting of
A rectangular soft urethane part 51 (specific gravity 0.01~
0.04, JIS-K-6401 hardness 7 ~ 18kg
/314 cm2), stack the upper mold 62 on the lower mold 61, and place the material of the main body urethane portion 52 (specific gravity 0.03 to 0.1, hardness 9 to JIS-K-6401) in the mold 60.
31kg/314cm2) is injected and foamed. The headrest 50 thus formed has a rectangular recess 57 in the main body urethane portion 52, as shown in FIG. depth h0 between
A gap 54 (5 to 20 mm) is formed and arranged over the entire length L region of the side surface of the soft urethane portion 51 shown in FIG. The headrest 50 has a solidified layer 53 in which the main body urethane portion 52 is impregnated into the soft urethane portion 51 .

0003

[Problems to be Solved by the Invention] However, when a cover 55 made of fabric, genuine leather, PVC leather, etc. is placed over the headrest 50 shown in FIG. Since the gap 54 is bent by force, stress may be concentrated at the corner 54a of the gap 54, and a crack 56 may occur as shown in FIG.

An object of the present invention is to provide a headrest in which cracks do not occur at the corners of the gap between the soft urethane part and the main body urethane part even when the headrest manufactured by a mold is covered with the above-mentioned cover.

[0005]

[Technical Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a soft urethane portion in a recess provided in the main body urethane portion, and a gap is formed between the side surface of the soft urethane portion and the wall surface of the recess. The bottom surface of the recess is impregnated and solidified with the lower surface of the soft urethane part in contact with the bottom surface of the recess, and the main urethane part extends in at least a part of the gap between the wall surface of the recess and the side surface of the soft urethane part. It has a structure in which parts are impregnated and solidified.

[0006]

[Operation] The urethane part of the main body extends in all or part of the gap between the wall surface of the recess provided in the urethane part of the main body and the side surface of the soft urethane part and is impregnated into the soft urethane part and solidified, so the urethane part of the main body and the soft urethane part are firmly connected, so even when the headrest is covered with a cover, the ends of the headrest do not bend much, and stress does not concentrate at the corners of the gap, so no cracks occur at the corners. .

[0007]

EXAMPLES The present invention will be explained below with reference to FIGS. 1 to 5 showing examples. In the headrest 10 of the first embodiment shown in FIGS. 1 and 3, the rectangular soft urethane portion 11 is disposed within the rectangular recess 15 of the main body urethane portion 12, and the main body urethane portion 12 is located on the lower surface 11a of the soft urethane portion 11. As shown in FIG.
An impregnated solidified layer 13 having a height h0 from a is formed. Therefore, since there is no gap between the side surface 11b of the soft urethane portion 11 and the wall surface 115a of the recess 15, even if the headrest 10 is covered with a cover, the end 1 of the main body urethane portion 12
2a does not bend, and no cracks occur in the corner portion 14a.

Headrest 20 of the second embodiment shown in FIG.
In this case, the protruding impregnated fixed layer 23 is formed at a constant pitch along the section L from the main body urethane part 22 to the soft urethane part 2.
It extends to 1. The height of the impregnated fixed layer 23 is h0 from the lower surface 21a of the soft urethane portion 21. Such an arrangement of the impregnated fixed layer 23 can be achieved by cutting out the partition wall 63 in FIG. 9 over the entire length of the area L from its upper end to the shape of the impregnated fixed layer 23 in FIG. 4 at a constant pitch. headrest 2
0 is almost the same as the headrest 10. In addition, in the headrest 20, the space between the impregnated fixed layers 23 becomes a gap 24 between the soft urethane portion 21 and the real short urethane portion 22.

A headrest 30 according to a third embodiment shown in FIGS. 2 and 5 is a modification of the headrest 20, and includes an impregnated fixing layer 3.
The height of 3 is h0 from the lower surface 31a of the soft urethane part 31.
is set to a smaller h1. Such an impregnated fixing layer 33 can be obtained by cutting out the partition wall 63 in the shape of the impregnated fixing layer 33 at a constant pitch from its upper end over the entire length of the area L in FIG. The function of the headrest 30 is substantially the same as that of the headrest 20. In addition, in the headrest 30, between the impregnated fixed layers 33 and above the impregnated fixed layers 33, there is a gap 34 between the soft urethane part 31 and the main body urethane part 32.

[0010] Although the above embodiment has been described with respect to a headrest for an automobile, the present invention can also be applied to a seat for an automobile.

[0011]

[Effects of the Invention] Since the present invention has the above-mentioned configuration, when a fabric, genuine leather, or PVC cover is placed on a headrest manufactured by a mold, the protruding portion of the urethane portion of the main body does not bend, unlike the conventional case. Cracks do not occur from the corners of the gap between the main body urethane part and the soft urethane part.

[Brief explanation of drawings]

FIG. 1 is a front view of main parts of a first embodiment.

FIG. 2 is a front view of main parts of a third embodiment.

FIG. 3 is a perspective view of essential parts of the first embodiment.

FIG. 4 is a perspective view of essential parts of the second embodiment.

FIG. 5 is a perspective view of essential parts of a third embodiment.

FIG. 6 is a perspective view of a conventional headrest.

FIG. 7 is a front view of main parts of a conventional headrest.

FIG. 8 is a front view of a conventional headrest with a cover placed on it.

FIG. 9 is a sectional view of a headrest mold.

[Explanation of symbols]

10 Headrest 11 Soft urethane part 11b Side 12 Main body urethane part 13 Impregnated solidified layer 15 Recess 15a Gap

Claims (1)

[Claims] Claim 1: A soft urethane part is arranged in a recess provided in the main body urethane part so that a gap is formed between the side surfaces of the soft urethane part and the wall surface of the recess, and the bottom surface of the recess is arranged in a manner that the soft urethane part is in contact with the wall surface of the recess. A headrest of different hardness, characterized in that the lower surface is impregnated and solidified, and the main body urethane part extends in at least a part of the gap between the wall surface of the recess and the side surface of the soft urethane part, and the soft urethane part is impregnated and solidified.