| 摘要 |
PROBLEM TO BE SOLVED: To stably fix even a heavy toroidal coil unit to a circuit body.SOLUTION: Each flexible piece 5h is bent inside, a coil fitting part 5f of a shield plate 5 is inserted to the base into a through-hole 3c of a toroidal core 3a, and a toroidal coil 3 is fitted to the coil fitting part 5f. Each of the flexible pieces 5h penetrating the through-hole 3c is restored outside by a resilient force, a lock 5i of each of the flexible pieces 5h is locked at an edge portion of the through-hole 3c on an end face 3b of the toroidal core 3a, and a base portion of each of the flexible pieces 5h is brought into press-contact with an inner peripheral surface of the through-hole 3c. The relative movement of the toroidal core 3a in the direction of a center axis or in a circumferential direction to a shield plate for the toroidal coil 3 is regulated by the locking of the lock 5i or the press-contact of the flexible pieces 5h. Thus, even if it is necessary to use a heavy toroidal coil 3, the toroidal coil 3 can be stably mounted and fixed onto a shield plate 5. |
