| 摘要 |
PROBLEM TO BE SOLVED: To suppress mechanical vibration generated by driving a large number of ink jet nozzles in a print head. SOLUTION: A plurality of plates 30-60 bonded each other include first plates and second plates separated therefrom. Nozzles 82-88 are provided in the first plate in order to eject ink to the receiving plane and a multi-branch tube 72 is disposed between the first and second plates while being coupled fluidally with nozzles. A vibration reducing chamber 90 is spaced apart from the multi- branch tube in the vertical direction and reduces mechanical vibration in a print head. Pressure chambers 76 are arranged along the ink fluid passage between the multi-branch tube and the nozzle and a transducer 78 is coupled with the pressure chamber and driven to eject ink through the nozzle.
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