Patent ID: 7881626

Claim:
An image formation apparatus comprising: a waste toner accommodation unit accommodating waste toner recovered; a rotation unit having opposite ends rotatably connected to two internal opposite surfaces, respectively, of said waste toner accommodation unit, said rotation unit transporting said waste toner as said rotation unit rotates; a segmentation unit segmenting an interior of said waste toner accommodation unit into a first region covering a portion of said rotation unit and containing said rotation unit, and a second region excluding said first region, said segmentation unit having a plurality of holes in a direction along said rotation unit to allow said waste toner to communicate between said first and second regions; a plate involved in detecting an amount of toner, said plate obstructing a detection area of a photo sensor with a predetermined amplitude as said rotation unit rotates; a mechanism detecting said amount of said toner, detecting that said waste toner in said waste toner accommodation unit has reached a predetermined amount when said photo sensor detects that said plate varies in amplitude; a toner compression fin moving upward and downward with a predetermined amplitude as said rotation unit rotates, to compress waste toner accommodated in said waste toner accommodation unit; a holding unit holding said segmentation unit rotatably relative to said waste toner accommodation unit, said segmentation unit having an external surface with a projection; and an elastic element securing said projection in a direction toward a lower portion of said waste toner accommodation unit.