PURPOSE: To prevent an invasion of the external air including a dust and the like to the inside of a apparatus housing equipment by making the body in a enclosed structure to insert the wire connection of a terminal plate in the terminal press-in hole of the rear side of the body.

CONSTITUTION: Since an electric wire inserting hole 26 which was provided to the body of equipment conventionally is provided to an operating body 25, and the body is formed in a box form whose front side and the lower side are opened, a body furnishing a closed bottom surface can be formed. And since a terminal plate 15 is pressed in to a press-in hole 5 provided at the inner side rear surface 6 of the body, and blocks the terminal press-in hole 5, no air including a dust flows in to the inside of the apparatus from the outside, and the internal circuits and equipments can be prevented from a trouble resulting from the dust.