| 摘要 |
PROBLEM TO BE SOLVED: To increase a magnetic circuit efficiency of an electromagnetic coil and miniaturize the electromagnetic coil by arranging a lower part 2 of a hollow porcelain and an upper part 3 of the hollow porcelain around a coil member 1.SOLUTION: Step parts 211 are provided at four corners of a flange part 21 at a lower part 2 of a hollow porcelain. Claw parts 321 are provided at four corners of side plate parts 32 and 32 at an upper part 3 of the hollow porcelain. A coil member 1 is sandwiched between an end plate part 31 at the upper part 3 of the hollow porcelain and the flange part 21 at the lower part 2 of the hollow porcelain. The lower part 2 of the hollow porcelain is fitted between the side plate parts 32 and 32 at the upper part 3 of the hollow porcelain. The claw parts 321 of the side plate parts 32 and 32 are bent on inner surfaces 211a of the step parts 211 at the lower part 2 of the hollow porcelain, and are pressurized and fixed in a direction for crimping the coil member 1 by the lower part 2 and the upper part 2 of the hollow porcelain. |
