| 摘要 |
An improved printer head for use in a non-impact type printer such as an ink-jet printer is provided. The printer head includes a first flow passage extending from an inlet port, to which ink under pressure is supplied, to a draining port and a second flow passage branching out of the first flow passage and leading to a nozzle aperture directed against a recording medium on which a desired character is to be printed. In the vicinity of the draining port is provided a draining vibrator to which an image or character signal is supplied. Depending on the operating condition of the draining vibrator, the ink is either drained out of the draining port or ejected out of the nozzle aperture. In the preferred mode, a driving vibrator is provided in the vicinity of the inlet port, and the driving vibrator is operated to deflect periodically inwardly to cause the ink to be normally discharged out of the nozzle aperture. The draining vibrator is operated in response to an image signal to deflect outwardly in association with the inward deflection of the driving vibrator to prevent the ink from being ejected from the discharging nozzle.
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