Importance

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Abstract

An inkjet printer head actuator including a vibrating plate having a flat plate shape, a chamber plate coupled to the vibrating plate, the chamber plate having chamber walls defining a plurality of uniformly spaced chambers each having a horizontal cross-sectional area decreasing gradually, as it extends one end thereof arranged toward the vibrating plate to the other end thereof arranged away from the vibrating plate, each of the chamber walls having a horizontal cross-sectional area increasing gradually as it extends one end thereof arranged toward the vibrating plate to the other end thereof arranged away from the vibrating plate, and a plurality of drive means attached to a surface of the vibrating plate opposite to the chamber plate at regions corresponding to the chambers, respectively. In this structure, the resistance moment caused by the bonding force of the chamber plate at the chamber wall end arranged away from the vibrating plate is greater than the total moment generated by each of the drive means.

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First Claim