Charging device

摘要

A charging device includes: a casing provided with an opening opposing a member-to-be-charged; a discharging wire provided in the casing; a grid electrode provided in the opening; a shutter for opening and closing the opening; a cleaning member for cleaning the grid electrode; and a moving mechanism for reciprocating the shutter and the cleaning member along a longitudinal direction of the opening. The moving mechanism includes a driving member for being rotationally driven, a first moving member, held by the driving member, for moving the shutter with rotational drive of the driving member, and a second moving member, held by the driving member, for moving the cleaning member with the rotational drive of the driving member. The charging device further includes: a mechanism for forming an interval between the shutter and the cleaning member so that the cleaning member moves in advance of the shutter by a predetermined distance when the shutter moves in a closing direction; and a stopper for stopping movement of the cleaning member, and the second moving member includes a holding portion for permitting idling when the shutter moves in the closing direction toward the cleaning member, stopped by the stopper, with rotation of the driving member.

主权项

1. A charging device comprising:
a casing provided with an opening opposing a member-to-be-charged; a discharging wire provided in said casing; a grid electrode provided in the opening; a shutter for opening and closing the opening; a cleaning member for cleaning said grid electrode; and a moving mechanism for reciprocating said shutter and said cleaning member along a longitudinal direction of the opening, wherein said moving mechanism includes a driving member for being rotationally driven, a first moving member, held by said driving member, for moving said shutter with rotational drive of said driving member, and a second moving member, held by said driving member, for moving said cleaning member with the rotational drive of said driving member, wherein said charging device further comprises: a mechanism for forming an interval between said shutter and said cleaning member so that said cleaning member moves in advance of said shutter by a predetermined distance when said shutter moves in a closing direction; and a stopper for stopping movement of said cleaning member, and wherein said second moving member includes a holding portion for permitting idling when said shutter moves in the closing direction toward said cleaning member, stopped by said stopper, with rotation of said driving member.