Patent ID: 7775139
Filing Date: 2010-08-17
Classification: B62D,Y10T

Abstract:
1. A steering wheel structure comprising: an internal member provided inside a vehicle steering wheel; a covering member covering the internal member; a layer of adhesive material bonding the covering member to a surface of the internal member, and a first concave-convex portion provided at the surface of the internal member, and a second concave-convex portion provided at surfaces of the first concave-convex portion and disposed in a particular pattern, wherein a depth of said second concave portion is between about 10 and 15% a depth of said first concave portion and said first and second concave-convex portions function to substantially increase a strength of the adhesive bond between said internal member and said covering member, and wherein the first concave-convex portion is a lattice pattern texture with a plurality of lattice convex portions and lattice concave portions, and a depth of the lattice concave portions is set to be from 150 μm to 200 μm, and wherein the second concave-convex portion is a satin finished texture with a plurality of satin finished convex portions and satin finished concave portions, the satin finished concave portions being conically-shaped and having a depth of about 20 μm.