THERMOCOMPRESSIVE INK SPRAY APPARATUS EQUIPPED WITH NETWORK FOR PREVENTING THE INK BACK-FLOWING

摘要

PURPOSE: A thermocompressive ink spray apparatus for a printer head is provided, to prevent the temperature of an operation fluid chamber from increasing and the ink of an ink chamber and an operation fluid chamber from being back flown. CONSTITUTION: The ink spray apparatus comprises a nozzle part(240) which comprises an ink chamber(257) receiving an ink and a nozzle hole for spraying the ink; a driving part(220) which forms an operation fluid chamber(227) and is provided with a heater(216) equipped within the operation fluid chamber; and a membrane(230) which separates the ink chamber(257) and the operation fluid chamber(227) and comprises an ink injection road(290) where an ink is supplied from the external ink source, an ink injection hole(231a) connecting the operation fluid chambers, and a connection hole(233a) connecting the operation fluid chamber and the ink chamber to allow the ink of the operation chamber to be supplied into the ink chamber. The size of the ink injection hole is smaller than the inner diameter of the operation fluid chamber to prevent the ink of the operation fluid chamber from being back flown into the ink injection road.