HEADREST AND VEHICLE SEAT PROVIDED THEREWITH, AND METHOD OF MANUFACTURING HEADREST
First Claim
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1. A headrest comprising:
- a headrest stay that has leg portions that are supported at a seat back and that extend in a seat height direction;
a first cushion material that is disposed at an inner side of a headrest skin, that supports a mass body and is formed of an elastically deformable urethane, and that is fixed to the headrest stay by adhesive force of the urethane itself; and
a second cushion material that is disposed at the inner side of the headrest skin, that structures a headrest pad together with the first cushion material, and that is formed of a urethane having a higher elastic coefficient than the first cushion material.
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Abstract
It is obtained a headrest and a vehicle seat provided therewith and a method of manufacturing a headrest, that can reduce load to a neck portion of a vehicle occupant at a time of a rear collision while ensuring NV performance. A first urethane and a second urethane are disposed at an inner side of a headrest skin of a vehicle seat, and structure a headrest pad. The first urethane is embedded in the second urethane, and is elastically deformable, and supports a mass body. An elastic coefficient of the second urethane is set to be higher than that of the first urethane.
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Citations
11 Claims
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1. A headrest comprising:
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a headrest stay that has leg portions that are supported at a seat back and that extend in a seat height direction; a first cushion material that is disposed at an inner side of a headrest skin, that supports a mass body and is formed of an elastically deformable urethane, and that is fixed to the headrest stay by adhesive force of the urethane itself; and a second cushion material that is disposed at the inner side of the headrest skin, that structures a headrest pad together with the first cushion material, and that is formed of a urethane having a higher elastic coefficient than the first cushion material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a headrest, comprising:
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a first step of setting a mass body between a pair of leg portions of a headrest stay; a second step of, after the first step, by supplying and foam-molding urethane, that is a raw material of a first cushion material, at an outer peripheral side of the mass body, connecting the mass body and regions at mass body sides of the leg portions, by the first cushion material; a third step of, after the second step, inserting the headrest stay into an interior of a headrest skin that is bag-shaped, and placing the first cushion material and the mass body in the interior of the headrest skin; and a fourth step of, after the third step, by injecting and foam-molding urethane, that is a raw material of a second cushion material whose elastic coefficient is set to be higher than that of the first cushion material, in the interior of the headrest skin, forming a headrest pad by the first cushion material and the second cushion material.
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Specification