Patent ID: 8322239

Claim:
A controller for an electronic device comprising: a first member having a cylindrical base with a circumferential side wall; a second member for adjusting an operation amount of said controller through a relative rotational movement of said first member and said second member by an operator, the second member having a strip-shaped resilience member formed in a circumferential shape around an axis of the rotational movement so as to bias itself against inside the base of the first member; a notch array having a continuous serration disposed on an inner circumferential face of the side wall of the first member and a first pawl disposed on the resilience member of the second member while biased by the resilience member so that the first pawl is engaged movably to said continuous serration, said serration being formed along a relative moving direction of one of said first member and said second member, said first pawl being formed to the remaining one of said first and said second members and being engaged movably to said continuous serration; and a position confirmation means disposed at a position different from said notch array, said position confirmation means having a single notch disposed at a different position from the continuous serration and a second pawl, said notch being formed on one of said first and said second members within a relative movement range of said first and said second members, said second pawl being disposed to the remaining one of said first and said second members and being engaged movably to said notch, the direction of said continuous serration and the direction of said first pawl in said notch array and the direction of said notch and the direction of the second pawl in the position confirmation means are disposed to be perpendicular to the relative moving direction of said first and said second members, wherein the first pawl is disposed on the inner circumferential face of the side wall of the first member, and the second pawl is disposed on the resilience member of the second member while biased by the resilience member so that the second pawl is engaged movably to said notch.