Charging device provided with a non-contact type discharge electrode and image forming apparatus including the charging device
AssigneeSharp Kabushiki Kaisha
InventorMasanobu Yamamoto
Life of this patent
Estimating the term…
Abstract
In a charging device, a holding member holding a discharge electrode is provided in a shield case. The holding member includes a first guide and a second guide defining a slit therebetween. In the slit, the rear face of the discharge electrode other than a first long side is fixed to the internal side face of the first guide. The holding member holds the discharge electrode so that the entire surface of the discharge electrode and the rear face of the first long side are positioned in an air path extending from the air inlet to a gap and the first long side faces a grid electrode.
Claims18
A charging device that generates corona discharge with respect to a surface of a photoreceptor in an electrophotographic image forming apparatus, comprising:
- a case having a first face and a second face, the first face facing the surface of the photoreceptor, and the second face being opposed to the first face and including an air inlet;
- a discharge electrode having a first long side with a plurality of discharge ends disposed intermittently, from which corona discharge takes place;
- and
- a holding member including a slit that generates a first air flow path of relatively high flow velocity directed from the air inlet to a gap of an end portion of the first face of the case on a downstream side in a moving direction of the photoreceptor surface via a center portion in a cross section of the case and a second air flow path of relatively low flow velocity that is directed to an end portion of the first face of the case on an upstream side in the moving direction of the photoreceptor surface, and wherein the holding member holds the discharge electrode so that a tip end portion of the discharge electrode is positioned in the first air flow path.
Dependencies are inferred from the claim text.