| 摘要 |
PURPOSE:To contrive the miniaturization of a rotary device and the reduction of a cost by constituting a frequency generator by the magnet of a rotary part and the detection coil of a rotation detection part and constituting a pulse signal generator by the nonmagnetized part of the rotary part and the detection element of the rotation detection part. CONSTITUTION:A magnet 23 functioning as the frequency generator is used is common, the nonmagnetized parts 40, 41 are formed to a part of the magnet 23 and a detection element 33 for detecting a PG signal is provided at a part of a detection coil 32. Since the element for detecting a PG signal is used in common as the element for the PG signal, a single pole magnet for the PG signal is not required. Because of the decrease of the number of components and the arrangement of the detection element 33 on a mounting base 31 in such a way, the rotary detector is miniaturized and the cost-down is attained. |
