According to the present invention, there is provided a printing mechanism comprising: a printing pin having an impacting surface at its front end; a holder for slidably supporting {HEAD ~ the printing pin} for {TAIL ~ movement} in the impacting direction; a hermetically sealed expansible container disposed in the rear end of the printing pin so as to come into contact with the same; a pressure transmitting medium filled within the hermetically sealed container; and two electrodes for applying a high voltage to the pressure transmitting medium provided within the hermetically sealed container 
for
According to the present invention , there is provided a printing mechanism comprising : a printing pin having an impacting surface at its front end ; a holder for slidably supporting { HEAD ~ the printing pin } for { TAIL ~ movement } in the impacting direction ; a hermetically sealed expansible container disposed in the rear end of the printing pin so as to come into contact with the same ; a pressure transmitting medium filled within the hermetically sealed container ; and two electrodes for applying a high voltage to the pressure transmitting medium provided within the hermetically sealed container
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