| 摘要 |
An image forming apparatus includes a recording head, a liquid tank, a head tank, a liquid supply passage, a liquid supply passage, a liquid intake port, a valve member, and a lock unit. The lock unit is disposed in the head tank to lock and unlock the valve member in response to a change in pressure within the head tank. In a locked state, the valve member closes the liquid intake port in immovable state to constantly stop flow of the liquid into the head tank. In an unlocked state, the valve member is movable to open and close the liquid intake port in response to a change in pressure within the head tank to regulate the flow of the liquid into the head tank.
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