Patent ID: 8328348

Claim:
A heater unit comprising: a locking device selectable between a locked state in which a heater unit chassis is locked in a printer chassis, and an unlocked state in which the printer chassis and the heater unit chassis are unlocked; and a grip portion configured to be gripped by an operator during a replacement operation, the grip portion and the locking device being arranged such that when the grip portion is in a first operating position, the locking device is held in the locked state, when the grip portion is in a second operating position, the locking device is held in the unlocked state, an operating state of the locking device changes from the locked state to the unlocked state in an interlocked manner with switching of a operating position of the grip portion from the first operating position to the second operating position, and the operating state of the locking device changes from the unlocked state to the locked state in an interlocked manner with switching of the operating position of the grip portion from the second operating position to the first operating position.