Steering torque detecting apparatus

摘要

A steering torque detecting apparatus for use in an electrically-operated power steering system of a vehicle. Flexural load which is applied between a pair of input and output shafts during a steering operation is absorbed by the contact between a printed board and the end of a boss portion of a mounting ring for mounting a slider, thereby preventing displacement of the position of contact of the slider with a potentiometer element. The mounting ring is provided with an elastically deformable cylindrical collar portion which surrounds the slider and the printed board is movably disposed inside the cylindrical collar portion to thereby prevent intrusion of foreign matter into the area of contact between the slider and the printed board. A bush for supporting the printed board is rigidly secured to either the input or output shaft through engagement between a positioning groove and a fixing pin and engagement of a bent end portion of the bush with a groove provided in the shaft.