Fujitsu Corporation

Michinori Kutami

Kazuaki Kurihara

Akira Nakazawa

Hideyuki Kikuchi

Katsunori Yamagishi

Masaharu Hida

Shigeyoshi Umemiya

Tsuyoshi Mita

There are disclosed a piezoelectric actuator which can obtain large displacement at low voltage, which is small-sized and lightweight, and whose manufacture cost is low, and a small-sized lightweight information storage apparatus in which the piezoelectric actuator is incorporated, and which is provided with a small inertia moment during head driving and a high recording density. A piezoelectric actuator includes a center body and two spiral arms , and two arms are entirely in rotation symmetry and nonlinear symmetry.

Piezoelectric actuator and information storage apparatus

There are disclosed a piezoelectric actuator which can obtain large displacement at low voltage, which is small-sized and lightweight, and whose manufacture cost is low, and a small-sized lightweight information storage apparatus in which the piezoelectric actuator is incorporated, and which is provided with a small inertia moment during head driving and a high recording density. A piezoelectric actuator includes a center body and two spiral arms and two arms are entirely in rotation symmetry and nonlinear symmetry.

The ink jet printer head comprises: a piezoelectric device including a stress removing electrode a stress removing piezoelectric layer formed on the stress removing electrode and a drive layers formed of drive electrodes and a piezoelectric layer formed on the stress removing piezoelectric layer the drive layer being divided in a plurality of drive portions and a plurality of non-drive portions by grooves which arrive at the stress removing piezoelectric layer and a channel plate jointed to the piezoelectric device and having discrete ink channels formed in parts thereof opposed to the drive portions corresponding to nozzles for jetting ink.

Ink jet printer head and ink jet printer

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.

Growing community of inventors

Kawasaki, Japan

Michinori Kutami