PIEZOELECTRIC VIBRATION ELEMENT, LIQUID INJECTION HEAD, AND LIQUID INJECTION DEVICE

• Main Authors: USUDA HIDENORI, NAKAMURA SHINICHI, HIRAIDE YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 29.11.2018
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To make it possible to accelerate an operation to inject liquid through deformation of a piezoelectric element.SOLUTION: A piezoelectric vibrator unit 40 has a plurality of piezoelectric layers 44 formed of a piezoelectric vibration material, a drive electrode part, and a common electrode group 50, which are arranged in lamination. The drive electrode part includes a first drive electrode group 53 including a plurality of first drive electrodes 54, and a second drive electrode group 56 including a plurality of second drive electrodes 57 not electrically connected to the first drive electrodes 54; the common electrode group 50 includes a plurality of common electrodes 51; the first drive electrodes 54 and second drive electrodes 57 are respectively held by the piezoelectric layers 44 in the lamination direction of the piezoelectric layers 44.SELECTED DRAWING: Figure 5 【課題】圧電素子の変形により液体を噴射する動作の高速化を可能とする。【解決手段】圧電振動材料からなる複数の圧電体層４４と、駆動電極部と、共通電極群５０とが積層配置して構成される圧電振動子ユニット４０であって、駆動電極部は、複数の第１駆動電極５４を含む第１駆動電極群５３と、第１駆動電極５４とは電気的に非接続とされる複数の第２駆動電極５７を含む第２駆動電極群５６と、を含み、共通電極群５０は、複数の共通電極５１を含み、圧電体層４４の積層方向に対して、各々の第１駆動電極５４及び第２駆動電極５７は圧電体層４４により挟まれる、圧電振動子ユニット４０。【選択図】図５