| 摘要 |
PROBLEM TO BE SOLVED: To partially adjust the thickness of a magnetic shield according to environmental magnetic field.SOLUTION: A magnetic shield 10 comprises: a tubular first shield part 11 formed of a magnetic material; and a tubular second shield part 12 and a tubular third shield part 13 which are formed of a magnetic material and shorter than the first shield part 11. The second shield part 12 and the third shield part 13 are provided to be overlapped each other so as to cover the outer peripheral surface at the central part of the first shield part 11. |
