| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid droplet ejector which has a high assembly precision despite a simple structure and assembling process, and is good in efficiency of transmitting expansion and shrinkage of a piezoelectric element to a projection, and to provide its manufacturing method. SOLUTION: The liquid droplet ejector includes pressure chambers which communicate with nozzles 41, a diaphragm which forms a part of the pressure chamber, piezoelectric elements 10 which oscillate the diaphragm, the projections on the diaphragm which are joined to the piezoelectric element 10 to conduct the oscillation to the diaphragm, and a bracket 20. The liquid droplet ejector ejects liquid droplets from the nozzles 41. A member equipped with the pressure chamber, diaphragm and projections can be fixed to the bracket 20. The bracket 20 is equipped with a groove part 21 which guides the rodlike piezoelectric element 10 in a space from its release part to the projections. The piezoelectric element 10 is bonded to the inside of the groove part 21. The piezoelectric element 10 has an external electrode on the release part side. The bracket 20 has a second groove part 25 which guides a contact part to the external electrode from the release part side. COPYRIGHT: (C)2009,JPO&INPIT
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