| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for a circuit to control an analog wave-form to simplify a circuit as a whole. SOLUTION: A pressure vessel 2 with a nozzle 6a has two vibration plates 5a, 5b to form an ink chamber 8, and two pressure elements are provided on the plates 5a, 5b, provided in the vessel 2, respectively, to impart vibration forces to the plates. One of the elements comprises a first pressure element 3 to deliver ink in the chamber 8 from a nozzle 6a to the outside, while the other element comprises a second pressure element 4 (piezoelectric elements 4a, 4b) to adjust the pressure of ink in the chamber 8. |
