Liquid material ejection device

A liquid material ejection device comprising:

• a liquid chamber communicating with an ejection port and being supplied with a liquid material;
• a plunger including a tip portion that has a smaller diameter than the liquid chamber and is moved back and forth in the liquid chamber;
• an elastic member urging the plunger upward;
• an arm disposed in a state extending in a horizontal direction;
• an arm driver serving as a driving source to operate the arm;
• a base member on which the arm driver is disposed;
• and
• a fastener rockingly supporting the arm to the base member,
• wherein the liquid material ejection device further comprises a rocker connected to the arm driver and rockingly supporting the arm,
• the arm driver includes a plurality of actuators disposed in a juxtaposed relation in a longitudinal direction of the arm, each of the actuators being extended and contracted in a direction perpendicular to the longitudinal direction of the arm to cause a rocking motion of the arm,
• the arm includes a presser pressing the plunger downward,
• the plunger includes a contact portion pressed by the presser,
• the plunger is linearly reciprocated with the rocking motion of the arm, and
• wherein the contact portion of the plunger and the presser are not interlocked with each other such that the presser slides in the horizontal direction of the extending direction of the arm relative to the contact portion of the plunger during the rocking motion of the arm,
• wherein the plurality of actuators comprises a first and a second actuators,
• wherein the rocker includes a first connection portion connected to one end of the first actuator, a second connection portion connected to one end of the second actuator, a first support portion rockingly supporting the first connection portion and a second support portion rockingly supporting the second connection portion,
• and wherein the fastener is a rod-like shaped and is disposed to have a longitudinal axis parallel to a longitudinal direction of the first and second actuators.