Fujitsu Corporation

Katsunori Yamagishi

Akira Nakazawa

Hideyuki Kikuchi

Michinori Kutami

An ink jet printing head includes a pressure chamber supplied with ink, a vibration plate, a nozzle, a force applying mechanism and a resilient member. The vibration plate is coupled to the pressure chamber and is subject to being driven in vibration to increase pressure in the pressure chamber when force is applied to the vibration plate. The nozzle communicates with the pressure chamber, and ink is ejected through the nozzle when pressure in the pressure chamber is increased. The force applying mechanism applies force to the vibration plate to drive the vibration plate in vibration and thereby increase the pressure in the pressure chamber to eject ink from the nozzle. The resilient member is interposed between the pressure chamber and the vibration plate. The resilient member resiliently supports the vibration plate relative to the pressure chamber.

Printing head having resiliently supported vibration plate

In a printing head which makes an ink jet system printing and includes a pressure chamber supplied with an ink, a nozzle which communicates to the pressure chamber, a vibration plate which forms one wall of the pressure chamber; and pressure applying mechanism for applying pressure to the vibration plate so as to eject the ink from the nozzle, the pressure applying mechanism includes a wire for applying the pressure on the vibration plate, and a driving part for displacing the wire. At least the pressure chamber is detachably mounted with respect to the pressure applying mechanism.

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Atsugi, Japan

Katsunori Yamagishi