| 摘要 |
PURPOSE:To simplify handling and facilitate observing a part to be checked, by constituting an iron core with a base part, the first parts which are extended from both ends of the base part in parallel at right angles to the base part, and the second parts which are extended similarly from front ends of said first parts. CONSTITUTION:An iron core 12 obtained by laminating many thin iron plates is constituted with a base part 13 having a prescribed length, the first parts 14 and 14 which are extended in parallel from both ends of the base part 13 in the direction orthogonal to the base part 13, and the second parts 15 and 15 which are extended from front ends of the first parts 14 and 14 in the direction orthogonal to them. The base part 13 is used as a grip part 16, and coils are wound around the first parts 14 and 14, and front end parts of the second parts 15 and 15 are exposed by prescribed dimensions, and the whole of them are covered with an insulator 21 consisting of a resin or the like in this state. Thus, it is made easy to observe magnetic powder patterns in the part to be checked, and handling is made easy. |
