Patent ID: 6719411
Filing Date: 2004-04-13
Classification: B41J

Abstract:
An ink jet recording head comprising:a base having a mass mB represented by a unit of kilogram; a piezoelectric actuator that contracts and extends in response to a drive signal, the drive signal having an edge rising time Tfall represented by second, the piezoelectric actuator having a fixed end secured to the base and a free end opposite the fixed end; a nozzle plate formed with a nozzle; a diaphragm having a spring module kd, the free end of the piezoelectric actuator being attached to the diaphragm; and an ink chamber in fluid communication with the nozzle, the ink chamber having an inner space to be willed with ink having a spring module ki, the inner space being increased and decreased to eject the ink from the nozzle in accordance with contraction and expansion of the piezoelectric actuator, wherein a relation of 2Ã—mB/Tfall2&gE;5.0 e6 represented by Newton per meter is met.