Patent ID: 8749228

Claim:
A torque index sensor of a steering system connected to an input shaft and an output shaft, the torque index sensor comprising: a ring-shaped magnet housing; an index magnet housed in the magnet housing, connected to the output shaft to rotate with the output shaft and formed in a rectangle shape at a cross-sectional view; and a magnetic device generating an impulse signal in response to rotation of the index magnet, secured to an interior of the magnet housing to output a magnetization signal in response to rotation of the index magnet; wherein the index magnet is arranged at a recess portion further inside than an inner circumference of the magnet housing to generate a magnetic field to a direction facing the magnetic device; wherein the magnet housing is interposed between the output shaft and the input shaft, and takes shape of a ring, wherein the index magnet is coupled to a part of periphery of the magnet housing.