Image forming apparatus with drum driving mechanism
AssigneeBrother Kogyo Kabushiki Kaisha
InventorYasushi Okabe
Life of this patent
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Abstract
An image forming apparatus includes a developing unit, a transfer unit, and a photosensitive drum assembly. The drum assembly has a photosensitive drum, a driven section integral with the photosensitive drum, and a driving section which transmits a driving force to the driven section to rotate the photosensitive drum. Either one of the driven section and the driving section comprises a contact face, which constitutes a part of a plane including a rotation axis of the photosensitive drum. The other of the driven section and the driving section comprises a single boss, which is substantially in parallel with the rotation axis and contacts the contact face.
Claims18
An image forming apparatus, comprising:
- a developing unit;
- a transfer unit;
- and
- a photosensitive drum assembly, which includes:
- a photosensitive drum;
- a driven section, which is provided integrally with the photosensitive drum;
- and
- a driving section, which transmits a driving force to the driven section to rotate the photosensitive drum, wherein
- either one of the driven section and the driving section comprises a contact face, which constitutes a part of a plane including a rotation axis of the photosensitive drum, and
- the other of the driven section and the driving section comprises a single boss, which is substantially in parallel with the rotation axis and contacts with the contact face;
- wherein an outer periphery of the photosensitive drum and an outer periphery of a member having the driving section are formed in a shape of cylindrical faces of concentric circles.
A photosensitive drum assembly, comprising:
- a photosensitive drum;
- a driven section, which is provided integrally with the photosensitive drum;
- and
- a driving section, which transmits a driving force to the driven section to rotate the photosensitive drum, wherein
- either one of the driven section and the driving section has a contact face, which constitutes a part of a plane including a rotation axis of the photosensitive drum, and
- the other of the driven section and the driving section is a single boss, which is substantially in parallel with the rotation axis and contacts with the contact face;
- wherein an outer periphery of the photosensitive drum and an outer periphery of a member having the driving section are formed in a shape of cylindrical faces of concentric circles.
A driving force transmitting mechanism for a rotary body comprising:
- a driven section, which is provided integrally with the rotary body;
- and
- a driving section, which transmits a driving force to the driven section to rotate the rotary body, wherein
- either one of the driven section and the driving section has a contact face, which constitutes a part of a plane including a rotation axis of the rotary body, and
- the other of the driven section and the driving section is a single boss, which is formed substantially in parallel with the rotation axis and contacts with the contact face;
- wherein an outer periphery of the rotary body and an outer periphery of a member having the driving section are formed in a shape of cylindrical faces of concentric circles.
Dependencies are inferred from the claim text.