| 摘要 |
PURPOSE:To increase the detected output by bending part of a magnetic yoke plate, securing a magnetic detector to the bent portion to oppose to a rotor permanent magnet, thereby eliminating the mounting parts of the detector. CONSTITUTION:A permanent magnet 3 is mounted on a rotor 1, a magnetic detector 4 is provided oppositely thereto, and when the rotating speed of the rotor 1 is detected by the output, part of a magnetic yoke plate 7 is bent to form a bent portion 7a, and a magnetic detector 4 is secured thereto. Thus, the mounting parts and screws of the detector 4 can be eliminated to reduce the number of parts, and a magnetic field acting on the detector 4 is increased to raise the detected output. |
