Patent ID: 8807400

Claim:
A liquid droplet discharging device comprising: a liquid chamber having a discharge opening through which a liquid material is discharged; an extrusion member including a plunger, the plunger being thinner than the liquid chamber so as not to contact a side wall of the liquid chamber and having a forward end portion which is advanced and retracted within the liquid chamber; a contact portion provided on the extrusion member; a driver for advancing and retracting the extrusion member; and a main body on which the extrusion member is disposed, and a stopper facing the contact portion, wherein a foremost advanced position of the extrusion member is set at a position where the forward end portion of the plunger does not contact with an inner wall of the liquid chamber, the foremost advanced position of the extrusion member is determined by a contact between the contact portion and the stopper, and the forward end portion of the plunger can be always held in non-contact with the inner wall of the liquid chamber while the extrusion member is advanced to discharge the liquid material.