| 摘要 |
A valve unit incorporated in a printer supplies ink from an ink cartridge to a recording head. The valve unit forms a pressurizing chamber with a seal film arranged on the valve unit to temporarily store ink. A valve is arranged at an ink inlet of the pressurizing chamber. An actuation lever is arranged between the seal film and the valve in the pressurizing chamber. An electromagnet is arranged outside the pressurizing chamber at a position facing the actuation lever with the seal film located between the electromagnet and the actuation lever. The electromagnet moves the actuation lever with magnetic force without contacting the actuation lever in a manner that the actuation lever restricts movement of the seal film based on negative pressure that is generated when ink is discharged from the pressurizing chamber.
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