US10613465B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10613465-B2 |
| Application number | US-201615554929-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2016 |
| Priority date | Mar 10, 2015 |
| Publication date | Apr 7, 2020 |
| Grant date | Apr 7, 2020 |
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Official abstract text for this publication.
A drum cylinder unit includes a photoconductive drum and a flange member. The flange member includes a fixing portion fixed to an end of the photoconductive drum, a cylindrical portion which forms a hollow portion therein, a groove portion provided at an edge of the cylindrical portion, and a gear portion. The groove portion and the hollow portion open to an outside of an axial direction of the photoconductive drum.
Opening claim text (preview).
The invention claimed is: 1. A drum unit usable in an electrophotographic image forming apparatus, the drum unit comprising: a photoconductive drum; a flange member; a coupling member including a through hole portion; and a pin penetrating the through hole portion and configured to transmit rotational force of the coupling member to the flange member, the pin having a longitudinal axis oriented in a longitudinal direction of the pin, wherein the flange member includes a fixing portion fixed to an end of the photoconductive drum, and a cylindrical portion which forms a hollow portion therein, the coupling member is connected to the flange member so that an inclination angle of the coupling member with respect to the longitudinal direction of the pin is variable and an inclination angle of the coupling member with respect to a rotational axis of the photosensitive drum is variable, the flange member includes elastic deformation portions which are provided opposed to each other with the rotational axis therebetween and which are not continuously connected with the cylindrical portion, the elastic deformation portions being provided with projections projecting toward the rotational axis, respectively, and a space between the projections is configured such that a width between the projections is smaller than a length of the pin measured in the longitudinal direction of the pin. 2. The drum unit according to claim 1 , wherein the cylindrical portion includes a rotational force receiving portion contactable with the pin and receiving rotational force from the pin, wherein a space is present between the rotational force receiving portion and the elastic deformation portions. 3. The drum cylinder unit according to claim 1 , wherein the cylindrical portion is a first cylindrical portion, the flange member further includes a second cylindrical portion provided outside of the cylindrical portion in a radial direction of the photoconductive drum, and a second groove portion provided between the first cylindrical portion and the second cylindrical portion, and the first cylindrical portion, the second cylindrical portion, and the second groove portion overlap in the axial direction of the photoconductive drum. 4. The drum cylinder unit according to claim 3 , wherein the second cylindrical portion includes a gear portion.
in which one coupling part has a tongue received with the intermediate member(s) in a recess with a transverse axis in the other coupling part · CPC title
each coupling part embracing grooves or ridges on the intermediate member · CPC title
for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms · CPC title
the process cartridge being mounted perpendicular to the axis of the photosensitive member · CPC title
relating to drum (G03G15/757 takes precedence) · CPC title
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