Patent ID: 7622687
Filing Date: 2009-11-24
Classification: B60Q

Abstract:
1. A turn signal switch device comprising: a housing having a cam surface; an operating lever that is rotatably supported by the housing; a driving body that holds the operating lever in three positions including first and second operating positions and a neutral position in cooperation with the cam surface; a first lever member that advances into or retreats from a rotational locus of a canceling projection on the side of a steering wheel, and that is rotationally operated when abutting on the canceling projection in a state of having advanced into the rotational locus; a torsion coil spring that resiliently biases the first lever member so as to approach the rotational locus of the canceling projection; and a second lever member that returns the operating lever to the neutral position from the first and second operating positions in conjunction with the rotation of the first lever member, the first lever member being made to retreat out of the rotational locus of the canceling projection against the resilient force of the torsion coil spring by the operating lever when the operating lever is in the neutral position, and the first lever member being made to advance into the rotational locus of the canceling projection by the resilient force of the torsion coil spring when the operating lever is in the first and second operating positions, wherein a winding portion of the torsion coil spring is supported in a lateral position of the first lever member by the housing, a bent portion that is bent toward the rotational locus of the canceling projection is formed on the side of a free end of one arm portion that protrudes linearly from the winding portion as a fixed end, the other arm portion is latched on the housing, and when a distal end of the first lever member rotates in a direction away from the winding portion, a resilient force is given to the first lever member from a portion between the bent portion and the distal end on the side of the free end.