Patent ID: 8659448
Filing Date: 2014-02-25
Classification: H01H

Abstract:
1. A rotation detection device, comprising: a rotatable operation member configured to be rotated in a first rotational direction and a second rotational direction opposite the first rotational direction, about a given operation central axis; and a rotation detection switch configured to detect movement of the rotatable operation member in the first or second rotational direction and a rotational amount of movement of the rotatable operation member; wherein the rotatable operation member includes a plurality of switch driving sections that are intermittently arranged in a circumferential direction of the rotatable operation member, the rotation detection switch includes a detector, and a switch body that is configured to hold the detector such that the detector can move in both a first movement direction and a second movement direction opposite the first movement direction, from an origin position, the detector is configured to be biased toward the origin position such that each time the detector moves in the first movement direction or the second movement direction from the origin position by a predetermined amount, the rotation detection switch outputs a detection signal corresponding to the first or second movement direction, the rotation detection switch is disposed in a posture in which the first movement direction and the second movement direction of the detector are in a direction oblique to the circumferential direction at a position where the switch driving sections of the rotatable operation member can be brought into contact with the detector, and the switch driving sections of the rotatable operation member are each shaped such that, when brought into contact with the detector as the rotatable operation member is being rotated in the first rotational direction, the switch driving sections move the detector in the first movement direction by at least the predetermined amount and then release the detector, which is biased to return to the origin position, and such that, when brought into contact with the detector as the rotatable operation member is being rotated in the second rotational direction, the switch driving sections move the detector in the second movement direction by at least the predetermined amount and then release the detector to return to the origin position.