To surely build in a terminal stand to an insulation case by making a projection part retreat together with a guide part as it is pressed by a terminal stand in contact therewith when contained and bringing it into contact with a surface of a terminal stand which is held by an insulation case.

A guide part 8 of an insulation case 4 which guides and positions a cut-out portion of a terminal stand 3 is provided with a projection part 10 which projects along a surface enlarging direction of the terminal stand 3. The projection part 10 retreats together with the guide part 8 as it is pressed by the terminal stand 3 in contact therewith when contained and is brought into contact with a surface of the terminal stand 3 held by an insulation case 4. Therefore, even if the terminal stand 3 itself warps or affected by floating power of insulation resin, the terminal stand 3 does not float or tilt largely apart from the insulation case 4 and the terminal stand 3 can be surely built to the insulation case 4.