| 摘要 |
PROBLEM TO BE SOLVED: To easily separate a sensor alone in a simple operation in a rotational speed-detecting apparatus. SOLUTION: A sensor 20 is mounted to a supporting annular body 40 in a manner of engaging an engagement element 22 of the sensor 20 with the supporting annular body 40, so that the sensor 20 is prevented from easily dropping. The engagement element 22 of the sensor 20 is not an elastic engagement element as in the prior art, but can be elastically deformed or broken by an external force. Therefore, in separating the sensor 20 from the supporting annular body 40, the external force is applied to the sensor 20 thereby elastically deforming or breaking the engagement element 22. The sensor 20 can be taken outside without resistance. |
