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US 2026/0295970 A1Published application
Steering wheel
AssigneeKuraray Co., Ltd.
InventorsNorio Makiyama, Yoshiaki Wakimoto, Yasuhiro Yoshida
Life of this patent
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Abstract
A steering wheel has a rim core portion, a resin portion molded on the rim core portion, and a skin that covers over at least part of a surface of the resin portion, in which the skin is an artificial material, and the steering wheel satisfies relationships of an expression (1) and an expression (2) below: 0.65 £ G / L £0 .95 Expression ( 1 ) 1.05 £ G / R £1 .35 Expression ( 2 ) in which L, R. and G are a type C durometer hardness.
Claims9
1:
- A steering wheel comprising:
- a rim core portion;
- a resin portion molded on the rim core portion;
- and
- a skin that covers over at least part of a surface of the resin portion, wherein:
- the skin is an artificial material, and
- the steering wheel satisfies relationships of an expression (1) and an expression (2) below:
- 0.65
- ≤
- G
- /
- L
- ≤
- 0.95
- Expression
-
- (
- 1
- )
- 1.05
- ≤
- G
- /
- R
- ≤
- 1.35
- Expression
-
- (
- 2
- )
- wherein L is a durometer hardness and represents a median of 10 values measured while a type C durometer is brought in contact with a surface side of one sheet of the skin disposed on a plate having a type D durometer hardness of 80 or more, provided that L is 10 or more and 100 or less;
- R is a durometer hardness and represents a median of 10 values measured while a type C durometer is brought in contact with a surface of the resin portion molded on the rim core portion, provided that R is 10 or more and 100 or less;
- and
- G is a durometer hardness and represents a median of 10 values measured while a type C durometer is brought in contact with the surface side of the skin with which the surface of the resin portion molded on the rim core portion is covered, provided that G is 10 or more and 100 or less.
32 more elements
2:
- The steering wheel according to claim 1, wherein G is 50 or more and 90 or less.
3:
- The steering wheel according to claim 1, wherein R is 75 or less.
4:
- The steering wheel according to claim 1, wherein L is 90 or less.
5:
- The steering wheel according to claim 1, wherein L is 75 or more.
6:
- The steering wheel according to claim 1, wherein the artificial material is a material with an appearance of grain leather.
7:
- The steering wheel according to claim 1, wherein the artificial material is a laminate comprising a fibrous substrate layer and a resin covering layer.
8:
- The steering wheel according to claim 7, wherein the fibrous substrate layer is a nonwoven fabric in which a resin is attached.
9:
- The steering wheel according to claim 1, wherein at least part of the skin does not adhere to the surface of the resin portion.