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Image forming apparatus, drum unit, and manufacturing method for the image forming apparatus

  • US 10,228,631 B2
  • Filed: 12/15/2017
  • Issued: 03/12/2019
  • Est. Priority Date: 12/15/2016
  • Status: Active Grant
First Claim
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1. An image forming apparatus, comprising:

  • a photosensitive drum assembly comprising;

    a photosensitive drum; and

    a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum, the flange contacting an inner surface of the photosensitive drum;

    an exposure head comprising;

    a plurality of light emitters aligned along the axial direction;

    a lens array focusing light from the light emitters on the photosensitive drum; and

    a head frame supporting the light emitters and the lens array, anda bearing directly supporting the flange rotatably, the bearing including a first contact face, the first contact face being in contact with the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.

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