Patent ID: 9417587
Filing Date: 2016-08-16
CPC Classification: G03G

Claim Text:
1. A belt unit comprising: a roller extending in an axial direction and defining a radial direction perpendicular to the axial direction; a first guide provided on a surface of the roller, the first guide being in a form of one of a convex shape and a concave shape; a belt configured to be looped taut around the roller; a second guide provided on an inner belt surface, the second guide being in a form of one of a concave shape and a convex shape, the first guide and the second guide being engaged with each other with an engagement depth in the radial direction; a regulating portion opposite to an outer belt surface and providing a gap being smaller than the engagement depth, wherein the gap is a length between the regulating portion and the outer belt surface; and a plate covering at least part of the outer belt surface in the axial direction, wherein the regulating portion is a protruding portion that protrudes from and is integrally disposed on the plate.