Patent ID: 8479707
Filing Date: 2013-07-09
Classification: F02D,G01D

Abstract:
1. A rotation angle detection device, comprising: a rotational member; and a fixed member having a cover body, at least one magneto-electric transducer and an elastic member; wherein the at least one magneto-electric transducer has a magnetism detection portion capable of detecting a change in magnetism caused by rotation of the rotational member and generating a detection signal representative of the change in magnetism, and an operation voltage output portion capable of performing an operation based on the detection signal from the magnetism detection portion and generating an output signal representative of the change in magnetism; wherein the cover body has a receptacle wall portion defining a receiving recess that receives the at least one magneto-electric transducer therein; wherein the elastic member is attached to the receiving recess in a manner such that the receptacle wall portion is applied with a biasing force in a direction perpendicular to an axis line thereof and in a direction parallel to the axis line, so as to elastically press the magnetism detection portion against a bottom surface of the receiving recess and to elastically press the operation voltage output portion against one of opposite wall surfaces of the receiving recess; wherein the receptacle wall portion is opened in an upper surface of the cover body, while a lower half thereof is projected from an inner surface of the cover body; and wherein the receiving recess has an engagement notch formed therein.