| 摘要 |
PURPOSE:To obtain a pickup of stable electromagnetic conversion characteristics by leading magnetic flux, due to a hum infiltrating from an opening part in a core via pole pieces, to a shield case. CONSTITUTION:Between a couple of coils 5a and 5b on core 1, projection part 2 confronting to shield case C with a slight gap is formed and this projection part leads magnetic flux, due to an electromagnetic induced hum infiltrating from the opening part into core 1 via pole pieces 4a and 4b, to case C. Consequently, an electromagnetic pickup of stable electromagnetic conversion characteristics can be obtained. |
