Patent ID: 8291775

Claim:
A torque sensor, comprising: a first rotating body rotatable around an input shaft; a second rotating body rotatable around an output shaft; a strain body, which includes a first engaging portion being separated from at least one of the first rotating body and the second rotating body in a first direction parallel to the input shaft, a second direction perpendicular to the first direction, and a third direction around the input shaft so that the first engaging portion is movable in each of the three directions relative to the at least one of the first rotating body and the second rotating body, and the first engaging portion being engageable with the at least one of the first rotating body and the second rotating body in the third direction, and which transmits a rotational torque to the third direction between the first rotating body and the second rotating body; and a detection element provided to the strain body to measure a strain of the strain body due to the rotational torque.