| 摘要 |
PROBLEM TO BE SOLVED: To provide a cam mechanism capable of making an apparatus small in size and low in cost by reducing the number of components in a pressure releasing mechanism of a fixing device. SOLUTION: In the pressure releasing mechanism of the fixing device, which prevents a pressure higher than necessary from being applied to a pressure roller 41 or a fixing roller 42 in a power saving mode or the like, cam follower surfaces X, Y, and Z of a pressure releasing cam 45 are provided with gentle parts, and the pressure releasing cam is rotated half a turn or more to switch from a pressure releasing state to a pressurizing state, so that acceleration of rotation due to an energizing force from an energizing member is suppressed. COPYRIGHT: (C)2007,JPO&INPIT
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