| 摘要 |
A control knob for a vehicle has an improved outward appearance by forming a boundary line between two different materials in a portion that is not visible and preventing abrupt differences in color due to light refraction. The control knob is produced by dual injection molding of two different materials, is installed on one end of a shift lever, and functions as a handgrip. The control knob includes an portion of opaque and transparent materials, an overlapping portion opaque and transparent materials, and a coated portion formed of paint applied to portions of the transparent portion that do not overlap with the opaque portion. A boundary surface between the opaque and transparent portions is such that a refractive index of light passing through the transparent portion from the overlapping portion is close to a refractive index of light passing through the transparent portion from the coated portion. |
