Charging device for a process cartridge and an image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorNao Itabashi
Life of this patent
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Abstract
A charger of a process cartridge may be configured so that a charging wire is laid across an upper frame. An upper frame may be provided with a stopper at which one end of the charging wire is caught, and with a wire pulling member that pulls the charging wire at the other end. The wire pulling member may include a coil spring portion and an engaging portion capable of engaging with the other end of the charging wire, so that the engaging portion may rotate on a centerline of the coil spring portion. The wire pulling member may be held in the upper frame so that the centerline of the coil spring portion may be substantially perpendicular to a longitudinal direction of an extended portion of the charging wire.
Claims9
A process cartridge detachably attachable to a main body of an image forming apparatus, the process cartridge comprising:
- a photosensitive member;
- and
- a charging device configured to charge the photosensitive member, the charging device including
- a charging wire;
- a frame including a pair of wire supporting walls configured to stretch taut and support the charging wire and a stopper that stops a first end of the charging wire;
- and
- a wire pulling member held in the frame, the wire pulling member including a coil spring portion that is helically structured and an engaging portion that is provided at an end portion of the coil spring portion and configured to engage with a second end of the charging wire, wherein the wire pulling member is held in the frame such that a coil centerline of the coil spring portion is substantially perpendicular to a longitudinal direction of an extended portion of the charging wire stretched between the wire supporting walls,
- wherein the end portion of the coil spring portion is stretched in a direction perpendicular to the coil centerline when the engaging portion engages with the second end of the charging wire.
Dependencies are inferred from the claim text.