US Patent 7109971 Joystick

A joystick includes an operating member, which has shaft portions respectively protruded from both side faces thereof, an upper rotary member, which supports the operating member so as to be pivotable in a first direction, a lower rotary member, which supports the operating member so as to be pivotable in a second direction perpendicular to the first direction and an urging member, which urges the lower rotary member and the upper rotary member so that the operating member is situated at a neutral position thereof. The lower rotary member has an elongated hole through which the operating member is passed, and the elongated hole extended in the first direction. The shaft portions are rotatably engaged in shaft holes which are formed in side walls of the elongated hole. Expansion parts are formed on the operating member so as to expand within the elongated hole in the first direction. The operating member rotates through the shaft portions so that both side faces of each expansion part slide along both inner wall faces of the elongated hole.