DRUM CYLINDER UNIT, THE METHOD OF ATTACHING THE BINDING ELEMENT AND THE DRUM UNIT Russian patent published in 2018 - IPC G03G15/00 

FIELD: images forming devices.

SUBSTANCE: present invention relates to the cylinder unit of the drum and to the drum unit, which are used in the electrophotographic image forming apparatus, such as a laser printer. Claimed group of inventions includes the drum cylinder unit, which is used in the electrophotographic image forming apparatus, the method of attaching the linking member, which includes a through-hole section, to the drum cylinder unit and the drum unit, which is used in the electrophotographic image forming apparatus. Where the drum cylinder unit, which is used in the electrophotographic image forming apparatus, includes the photoconductive drum and the flange member, wherein the flange member comprises the fastening section, which is fixed to the end of the photoconductive drum, the cylindrical portion that forms a hollow section inside of itself, a groove section, which is provided at the edge of the cylindrical section, and the gear section, wherein the groove section and the hollow section are exposed to the outside in the axial direction of the photoconductive drum, the groove section includes the first portion, which has the first width Z1 and the second portion, which has the second width Z2, where Z1>Z2, wherein the second portion is located on the outside in comparison to the first portion in the axial direction of the photoconductive drum and the flange member is capable of being elastically deformed with the increase of the second width Z2 up to the third width Z3, where Z3>Z2.

EFFECT: technical result consists in facilitating the attachment of the binding element, which is provided for at the end of the photoconductive drum, to the photoconductive drum.

35 cl, 22 dwg