The drive color for the fixation device, the key way which was formed to the destal of the fixation device

摘要

PROBLEM TO BE SOLVED: To provide a fixing device for an electrophotographic device capable of restraining the rupture speed of the device and prolonging the lives of parts by improving mechanical strength.;SOLUTION: A key groove 32 is formed at the end of a heating roller 14, and a drive collar 34 is provided with a drive key 35 engaged in the key groove 32, then the drive key 35 is provided with a fixed part 39 inserted and fixed in a mount hole 38 of the collar 34 and a key part 40 projecting from the peripheral surface of the collar 34 and engaged in the groove 32, and the outside diameter D2 of the root part of the fixed part 39 on the key part side, at least, is made larger than the width dimension W of the narrow part of the key part 40.;COPYRIGHT: (C)2003,JPO