Patent ID: 8471195
Filing Date: 2013-06-25
Classification: H01H,H03K

Abstract:
1. A push button comprising: a depressing portion; an urging portion that urges the depressing portion in a first direction; a detection target portion that pokes out from the depressing portion in a second direction that is opposite to the first direction; a protruding portion that pokes out from the depressing portion in the second direction; a photo sensor that detects the detection target portion when the depressing portion is depressed in the second direction by a predetermined distance or longer; and an elastic portion that gets elastically deformed when the depressing portion is depressed in the second direction by the predetermined distance or longer, wherein the elastic portion is a dome-shaped metallic round plate; a round convex portion is arranged in the protruding portion; a round concave portion is arranged in the elastic portion; and, the round convex portion contacts the round concave portion when the elastic portion is pushed by the protruding portion.