Electrophotographic image forming apparatus, developing apparatus, and coupling member

  • US 10,712,709 B2
  • Filed: 09/18/2019
  • Issued: 07/14/2020
  • Est. Priority Date: 03/23/2007
  • Status: Active Grant
First Claim
Patent Images

1. An image forming apparatus cartridge comprising:

  • a casing;

    developer contained within the casing;

    a developer roller having an axis L1, the developer roller being rotatably supported by the casing to permit rotation about the axis L1; and

    a coupling member having an axis L2 about which the coupling member is rotatable and a free end portion for receiving a rotational force, the free end portion including at least two projections that are positioned at least partly outside of the casing, each of the at least two projections being open to the axis L2 and having a slanted surface with respect to a plane perpendicular to the axis L2, the coupling member being operatively connected to the developer roller in order to be capable of transmitting the rotational force to the developer roller,wherein the coupling member is movable between (i) a first position in which the axis L2 of the coupling member is substantially parallel to and offset from the axis L1 of the developer roller such that the axis L2 does not pass through the developer roller, (ii) a second position in which the axis L2 of the coupling member is inclined with respect to the position of the axis L2 when the coupling member is in the first position, and (iii) a third position in which the axis L2 of the coupling member is inclined with respect to the position of the axis L2 when the coupling member is in the first position in a direction opposite to the direction the coupling member is inclined when in the second position.

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