Liquid material discharge device

A liquid material discharge device comprising:

• a liquid material supply section for supplying a liquid material to be discharged;
• a discharge section having a nozzle for discharging the liquid material;
• a body having
• a space formed therein as a hole or bore extending from a side surface of the body,
• a first channel, opening to the space, to constitute a measurement hole,
• a second channel, opening to the space, for interconnecting the space and the liquid material supply section and
• a nozzle connecting portion formed in a lower portion of the body for attaching the nozzle;
• a plunger to slide along an inner wall surface of the first channel to suck and discharge the liquid material into and from the first channel;
• a rotary valve member which is formed with a third channel for interconnecting the first channel and second channel and with a through hole penetrating the rotary valve member for interconnecting the first channel and the discharge section, the third channel being a recessed groove formed in a surface of the rotary valve member;
• and
• control section for controlling the aforesaid sections,
• wherein the rotary valve member is fitted in the space, wherein no close contact pressure is externally applied to the valve member,
• wherein when the liquid material is sucked into the measurement hole, the control section controls the rotary valve member to be located at a first position to interconnect the liquid material supply section and the measurement hole and to interrupt the interconnection between the measurement hole and the discharge section,
• wherein when the liquid material in the measurement hole is discharged, the control section controls the rotary valve member to be located at a second position to interconnect the measurement hole and the discharge section and to interrupt the interconnection between the liquid material supply section and the measurement hole, and
• wherein the control section rotates the rotary valve member through a predetermined angle such that the rotary valve member is selectively shifted to the first position or the second position.