| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque sensor capable of restraining, to the minimum, reduction of a magnetic flux caused by formation of a cut-out provided in a yoke of a coil unit. SOLUTION: In this torque sensor provided with a rotary shaft connected by a torsion bar, a cylindrical coil unit provided to surround the rotary shaft, and an impedance variable means for varying an impedance of the coil unit in response to variation of a torque acting on the rotary shaft, and for detecting the torque generated in the rotary shaft, based on the impedance variation by the impedance variable means, the coil unit is constituted of a bobbin constituted of a wound part wound with a coil, and a terminal part for extracting the coil to an outside, and the yoke stored inside the bobbin and formed with the cut-out for the terminal extraction for the bobbin, and a protrusion projected toward an axis-directional end face side of the terminal in the circumferential-directional central part of the cut-out, and coil escape grooves formed in circumferential-directional both sides of the protrusion are formed in the cut-out in the yoke. COPYRIGHT: (C)2005,JPO&NCIPI
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