Patent attributes
A selector unit includes a protruding portion and a dial member. The dial member is configured to be displaced between an initial position and a depressed position along an axial direction of the protruding portion, and to be rotationally operable in a circumferential direction when depressed to the depressed position. An offset angle at a rearward side when the dial member is at the initial position is greater than the offset angle at a forward side when the dial member is at the depressed position. The offset angle means an angle between an extended line obtained by extending an upper face of the protruding portion outwards in a radial direction and a tangential line in contact with both the upper face of the protruding portion and an upper face of the dial member, in a section including a rotation axis of the dial member.
