| 摘要 |
The image forming apparatus including a belt member having a convex portion, effecting a circular movement, a first tensioning member for tensioning said belt member and a second tensioning member for tensioning said belt member, drive receiving means for receiving force by a circular movement in a direction of the circular movement of said belt member, wherein an angle of said second tensioning member to said first tensioning member by inputting the force by the movement into said drive receiving means, and wherein the force by the circular movement is input by contacting said convex portion to said drive receiving means.
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