| 摘要 |
PURPOSE:To facilitate the mounting of a Hall device by a method wherein, the Hall device is mounted on the inner circumferential surface of the hole in the substrate for mounting the Hall device having a hole the diameter thereof is larger than the substance to be detected in the manner so as to make the detecting surface of the Hall device face against the substance to be detected. CONSTITUTION:The substrate 13 for Hall device mounting is formed by a flat double-faced wiring board such as a PC board or the like and composed of a disc section 13a having holes diameter thereof is larger than the magnet 6 of a rotor 5 and a leading section 13b extending from the disc section 13a in a direction and the Hall device is mounted at notches 15 for the Hall device mounting formed on the substrate 13. And the substrate 13 is installed by closely contacting the disc section 13a and the leading section 13b to the stepped sections 4a and 4b on a frame 4 respectively. In this way, the positioning and fixing of the Hall device can easily be performed. |
