Patent ID: 8682238

Claim:
A grounding structure comprising: a rotation shaft that has a non-circular cross section, and that rotates; and a grounding member that is attached to the rotation shaft to electrically communicate with the rotation shaft, and that rotates together with the rotation shaft, wherein the grounding member includes: a first grounding portion of which outer shape is a circular shape; a grounding retainer that is provided on a side of the first grounding portion in an axial direction of the rotation shaft, and that has an outside diameter that is larger than an outside diameter of the first grounding portion along an entirety of an outer periphery of the first grounding portion, wherein the grounding retainer completely surrounds the outer periphery of the first grounding portion when viewed along the axial direction of the rotation shaft; and a spring member that is elastically held in contact with the first grounding portion of the grounding member, wherein the grounding member is biased toward of the rotation shaft by the spring member.