| 摘要 |
PROBLEM TO BE SOLVED: To enhance the mount accuracy and the workability by mounting a plurality of magnetic sensors on a circuit board such that all side faces located at equivalent positions extend in parallel thereby facilitating manual mounting of the maggnetic sensor. SOLUTION: A land part Y1 in the center of land parts X1, Y1, Z1 formed on a circuit board 2 is a reference land part. In the reference land part Y1, four lands 10 are arranged while matching the longitudinal direction thereof substantially with the radial direction and the imaginary center thereof is located on a rotational track of a specified rotational radius R around the center of rotation O of a drive magnet. Other land parts X1, Z1 are arranged on the same rotational track while directing the longitudinal direction of the land 10 in parallel with that of the reference land part Y1. Hall elements H1, H2, H3 are mounted on the lands 10 at respective land parts X1, Y1, Z1 with respective lead terminals 8 thereof extending in the longitudinal direction of respective lands 10 and soldered to the lands 10 with high electric accuracy. |
