Patent ID: 8309869
Filing Date: 2012-11-13
Classification: H01H

Abstract:
1. A switch device comprising: a cylindrical tubular case receiving a switch circuit; a rotary shaft supported by the tubular case and rotatable relative to the tubular case; and a tubular operation member surrounding the tubular case and having the same axis as the tubular case; wherein the operation member has a first end and a second end opposite to the first end in an axial direction; wherein the first end of the operation member is joined to the rotary shaft, so that the operation member can rotate together with the rotary shaft about the axis; wherein the switch circuit is operated as the operation member rotates with the rotary shaft relative to the case; and a projection protruding radially inwardly from an inner circumferential surface of the operation member and extending in a rotational direction of the operation member; and wherein the projection has a protruded end having a wedge-like cross section, so that the protruded end can contact an outer circumferential surface of the case in line contact relationship therewith.