| 摘要 |
PROBLEM TO BE SOLVED: To prevent a driven gear on an opening/closing unit side engaged with a drive gear on a device body side from tooth-skipping in rotation starting of the drive gear in the closed state of the opening/closing unit. SOLUTION: A restriction member 52 is mounted to a gear box on a body side for supporting the drive gear 80. The restriction member 52 has a semi-circular bearing part 100 and a left wall part 101 upwardly standing up from a left end of the bearing part 100. A neighborhood to an intersection of a linear line L connecting a center C1 of an end 55 of a shaft 54 integral with the driven gear 53 and a center C2 of the drive gear 80 and the bearing part 100 becomes a first restriction part M1 for preventing the driven gear 53 from separating in driving of the drive gear 80. COPYRIGHT: (C)2008,JPO&INPIT
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