Charging device having a charger arrangement frame in which a discharge wire, coil spring and electrode are disposed, for use in a compact electrophotographic image forming apparatus

A charging device comprising:

• a pair of support members spaced apart at a predetermined distance;
• a discharge wire having first and second opposing ends and a middle portion therebetween, said wire being stretched between the pair of support members with the first end thereof being fixed to one of the support members and with the middle portion thereof being supported by the other support member;
• a coil spring for applying a tension to the discharge wire, one end thereof being connected to the second end of the discharge wire;
• an electrode having a hooking portion for receiving the other end of the coil spring;
• an electrode fixing member for fixing the electrode in the vicinity of the other support member;
• and
• a charging device frame having a charger arrangement frame in which the discharge wire, the coil spring and the electrode are disposed, and having a brush holder to which a brush member is attachable, the charger arrangement frame and the brush holder being integrally formed in an adjoining relation, and the brush holder having a retention space for receiving an attachment plate portion of the brush member, the brush holder further having a plurality of linear protrusions facing the retention space, extending parallel to a direction of an insertion of the attachment plate portion, and being arranged across the direction of the insertion of the attachment plate portion along an extension of the discharge wire.