| 摘要 |
A toner supply device for use in an image forming apparatus is constructed such that a length of the extruding portion 24A of the L-shaped blade 24 is determined to 2 mm or less and a distance of the gap Y is determined to 3 mm or more, the gap Y being formed between the contact portion 19A and an intersection point where an imaginary straight line passing a rotating center of the toner supply roller 20 and the contact portion 19A intersects the surface of the toner supply roller 20 namely, between the lower surface of the extruding portion 24A and the outer peripheral surface of the toner supply roller 20. With this structure, a toner supply path G is formed linearly around the toner supply roller 20 and the developing roller 19 without making a large detour in the developing roller 19 side, so that the flow of toner can be made smooth in the toner supply path G, preventing toner clogging therein. Accordingly, toner can smoothly be supplied from the toner supply roller 20 to the developing roller 19 and the resultant image excellent in quality can be obtained for a long period.
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