Patent ID: 8687993
Filing Date: 2014-04-01
Classification: G03G

Abstract:
1. A charging device comprising: a charging member opposing a charged body to be charged, the charging member being provided in contact with or adjacent to the charged body; a charge housing that holds the charging member; bearing members provided in the charge housing to rotatably support both axial ends of the charging member, at least one of the bearing members being a conductive bearing member formed of a conductive material; pressing members provided in the charge housing to press the bearing members toward the charged body, at least the pressing member that presses the conductive bearing member being formed of a conductive material; a substantially platelike power supply member fixed to the charge housing and provided in contact with the pressing member corresponding to the conductive bearing member so as to supply power to the charging member via the pressing member and the conductive bearing member; and positioning mechanisms that position the bearing members pressed by the pressing members at a predetermined holding position relative to the charge housing so that the bearing members do not fall off, wherein the power supply member has an elastically deformable and substantially platelike extending portion extending to a position opposing the conductive bearing member, and wherein the positioning mechanism provided on a power supplied side of the charging member includes a substantially depressed or projecting positioning portion provided in a portion of the conductive bearing member opposing the extending portion, and a substantially projecting or depressed positioned portion provided in a portion of the extending portion corresponding to the positioning portion, the positioned portion engaging with the positioning portion when the extending portion elastically deforms, wherein the positioning mechanism located on the power supplied side of the charging member includes a substantially depressed positioning portion provided in the conductive bearing member, and a substantially projecting positioned portion provided in the extending portion, wherein the substantially projecting positioned portion is formed by a projecting piece obtained by folding a part of the extending portion in an angular form, and wherein an inclination angle of a portion of the projecting piece on a side to be pressed by the pressing member with respect to a pressing direction of the pressing member is set to be smaller than an inclination angle of a portion of the projecting piece located on an opposite side with respect to the pressing direction of the pressing member.