Button construction and the button expensive system for a vehicle with the same

摘要

A knob structure has a head portion and a cylindrical portion, which projects from a surface of the header section. The projection portion is locked with and suitable for this, together with the head portion to rotate. A plurality of friction before jumps are arranged along a periphery of said protruding portion and suitable for the purpose of friction sound pattern by sequentially rubbing against a outward projection when the head portion rotates. A fastening element is connected to the projection portion of the header section in an opposite direction coupled.