Patent ID: 11971681
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G  F  H  B | IPC B  F  G  H

Claim 11:
12. A coupling structure provided in an image forming apparatus that forms an image on a recording material and constituted to couple a first sheet metal and a second sheet metal having an insulative layer on a galvanized layer on a surface of a metal layer, respectively, the coupling structure comprising:
a first through hole formed in the first sheet metal;
a second through hole formed in the second sheet metal; and
a screw member includes a head portion having a seat surface and a screw portion inserted into the first through hole and the second through hole, and constituted to fasten the first sheet metal and the second sheet metal,
wherein a diameter of the first through hole is smaller than a diameter of the head portion,
a diameter of the second through hole is smaller than the diameter of the first through hole,
the first sheet metal includes a conductive portion from which the insulative layer is removed but the galvanized layer remains and is exposed in the first sheet metal, the conductive portion formed around the first through hole, and
the screw portion of the screw member is screwed in the second through hole so that the seat surface comes in contact with the conductive portion.