Ink jet recording head
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United States of America Patent
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Apr 13, 2004
Grant Date -
May 1, 2003
app pub date -
Oct 31, 2002
filing date -
Oct 31, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ink jet recording head that enables a reduction in the amount of piezoelectric plate consumed, so that costs can be lowered, without lowering efficiency of piezoelectric actuators, even if the piezoelectric actuators are only roughly fixed to the housing, and that also enables accurately and easily positioning the piezoelectric actuators with respect to a diaphragm that defines an ink channel. Assuming that mB is the mass (kg) of the base 3 to which the piezoelectric actuator 5 is fixed and T.sub.fall is the rising edge time (s) of the drive signal that drives the piezoelectric actuator 5, the spring modulus determined from mB and T.sub.fall is 2.times.mB/T.sub.fall.sup.2.gtoreq.5.0 e.sup.6 (N/m). Therefore, the displacement of the piezoelectric actuator can be efficiently transmitted to the ink chamber regardless of the spring modulus of the adhesive agent used to fix the base to the housing.
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