To make displacement quantity of a contact member and a door lower.

A contact member 16 is composed of a spring leaf 18 bent into a U-shape at bending part 26 and a spring clip 17 composed of a front clip part 19 and a rear clip part 20. The contact member 16 is fixed to a frame element 36 by inserting the member 16 into a slot 38 formed in a flange 37 of an edge 35 of the frame element 36, and by pinching the frame element 36 by the front clip part 19 and the rear clip part 20. In this state, a first contact part 25 makes contact with a door 41, and a second contact part 27 makes contact with the frame element 36, consequently the door 41 is electrically connected with the frame element 36. When the door 41 slides in the direction of an arrow A, the contact member 16 is transformed from a state which is shown in a full line to a state shown in a dotted line.