US 9,176,454 B2Granted

Electrophotographic photoreceptor

AssigneeFuji Electric Co., Ltd.

InventorsKeiichi Kurokawa, Yuji Ogawa

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Abstract

An electrophotographic photoreceptor is used by being detachably mounted onto an apparatus main body of an electrophotographic application apparatus while being incorporated in a process cartridge. The electrophotographic photoreceptor has a photosensitive drum formed by forming a photosensitive layer containing a photoconductive material on an outer circumferential surface of a cylindrical conductive substrate; and a flange that is fitted to an open end of the photosensitive drum and transmits a rotational driving force from the apparatus main body to the photosensitive drum. In the flange, on a surface thereof receiving the rotational driving force, a driven-side power transmission portion that is configured by a cylindrical body disposed concentrically with respect to a central shaft of the photosensitive drum, and engaging projections are provided.

Claims15

Dependent claims

An electrophotographic photoreceptor, which is used by being detachably mounted onto an apparatus main body of an electrophotographic application apparatus while being incorporated in a process cartridge, the apparatus main body including a drive-side power transmission portion, the electrophotographic photoreceptor comprising:

a photosensitive drum including
a cylindrical conductive substrate having an outer circumferential surface, and
a photosensitive layer containing a photoconductive material on the outer circumferential surface;
and
a flange that is fitted to an edge of the photosensitive drum, the flange configured to transmit a rotational driving force from the drive-side power transmission portion to the photosensitive drum, the flange including
a driving force receiving portion, and
a driven-side power transmission portion configured to transmit the rotational driving force from the drive-side power transmission portion to the driving force receiving portion, the driven-side power transmission portion including
a cylindrical body, a core of the cylindrical body being a central shaft of the photosensitive drum, the cylindrical body protruding from the driving force receiving portion, and
a plurality of hemispherical engaging projections that are disposed at each trisection point of an outer circumference of the cylindrical body in such a manner so as to protrude in a radially outward direction from the outer circumference, away from the driving force receiving portion, and to be configured to come into engagement with the drive-side power transmission portion, circumferences of the hemispherical engaging projections being disposed in direct contact with the cylindrical body.

6 more elements

a photosensitive drum including
a cylindrical conductive substrate having an outer circumferential surface, and
a photosensitive layer containing a photoconductive material on the outer circumferential surface;
and
a flange that is fitted to an edge of the photosensitive drum, the flange configured to transmit a rotational driving force from the drive-side power transmission portion to the photosensitive drum, the flange including
a driving force receiving portion, and
a driven-side power transmission portion configured to transmit the rotational driving force from the drive-side power transmission portion to the driving force receiving portion, the driven-side power transmission portion including
a cylindrical body, a core of the cylindrical body being a central shaft of the photosensitive drum, the cylindrical body protruding from the driving force receiving portion, and
a plurality of engaging projections that are disposed at each trisection point of an outer circumference of the cylindrical body in such a manner so as to protrude in a radially outward direction from the outer circumference, away from the driving force receiving portion, and to be configured to come into engagement with the drive-side power transmission portion,
the engaging projections each having an elliptic, planar shape as viewed in a radially outward direction of the cylindrical body, major axes of the elliptic, planar shapes of the engaging projections extending in a circumferential direction of the cylindrical body,
the drive-side power transmission portion having a spiral, engaging hole provided at a central portion thereof, the engaging hole having a triangular cross section,
the engaging projections being configured to engage with a surface of the engaging hole to rotate the photosensitive drum.

9 more elements

a photosensitive drum including
a cylindrical conductive substrate having an outer circumferential surface, and
a photosensitive layer containing a photoconductive material on the outer circumferential surface;
and
a flange that is fitted to an edge of the photosensitive drum, the flange being configured to transmit a rotational driving force from the drive-side power transmission portion to the photosensitive drum, the flange including
a driving force receiving portion, and
a driven-side power transmission portion configured to transmit the rotational driving force from the drive-side power transmission portion to the driving force receiving portion, the driven-side power transmission portion including
a cylindrical body, a core of the cylindrical body being a central shaft of the photosensitive drum, the cylindrical body protruding from the driving force receiving portion, and
a plurality of engaging projections that are disposed at each trisection point of an outer circumference of the cylindrical body in such a manner so as to protrude in a radially outward direction from the outer circumference, away from the driving force receiving portion, and to be configured to come into engagement with the drive-side power transmission portion,
the engaging projections each having elongated, oval, planar shapes as viewed in a radially outward direction of the cylindrical body, longitudinal directions of the elongated, oval, planar shapes of the engaging projections extending in a circumferential direction of the cylindrical body,
the drive-side power transmission portion has a spiral, engaging hole provided at a central portion thereof, the engaging hole having a triangular cross section,
the engaging projections being configured to engage with a surface of the engaging hole to rotate the photosensitive drum.

9 more elements

a photosensitive drum including
a cylindrical conductive substrate having an outer circumferential surface, and
a photosensitive layer containing a photoconductive material on the outer circumferential surface;
and
a flange that is fitted to an edge of the photosensitive drum, the flange being configured to transmit a rotational driving force from the drive-side power transmission portion to the photosensitive drum, the flange including
a driving force receiving portion, and
a driven-side power transmission portion configured to transmit the rotational driving force from the drive-side power transmission portion to the driving force receiving portion, the driven-side power transmission portion including
a cylindrical body, a core of the cylindrical body being a central shaft of the photosensitive drum, the cylindrical body protruding from the driving force receiving portion, and
a plurality of engaging projections that are disposed at each trisection point of an outer circumference of the cylindrical body in such a manner so as to protrude in a radially outward direction from the outer circumference, away from the driving force receiving portion, and to be configured to come into engagement with the drive-side power transmission portion,
the engaging projections each having a semicircular, planar shape as viewed in a radially outward direction of the cylindrical body,
the drive-side power transmission portion has a spiral, engaging hole provided at a central portion thereof, the engaging hole having a triangular cross section,
the engaging projections being configured to engage with a surface of the engaging hole to rotate the photosensitive drum.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/126,587Filed 28 Sep 2012
Priority: JP 2012-06235419 Mar 2012
Published: US 2014/0133886 A115 May 2014
Granted: 3 Nov 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G03G 15/757
Details relating to xerographic drum, band or plate, e.g. replacing, testing: drive mechanisms for photosensitive medium, e.g. gears
G03G 21/186
For transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms: axial couplings
G03G
Electrography