LIQUID DISCHARGE PUMP DEVICE AND NOZZLE STRUCTURE OF LIQUID DISCHARGE PUMP DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a liquid discharge pump device and a nozzle structure which can effectively reduce dripping of liquid from a nozzle tip.SOLUTION: A nozzle structure projecting laterally from a body side of a liquid discharge pump device has a nozzle cylinder 60 with a mouth part 68 opening at a tip side, and a communication groove 74, which vertically crosses at least the lower side of the mouth part 68 in a cylinder radial direction and communicates the lower side of an outer edge part 72 of the mouth part 68 with a cylindrical hole h of the nozzle cylinder 60, is formed. Liquid running down to the lower side of the outer edge part 72 can be sucked back to the inside of the nozzle by suck-back of the pump device, thereby reducing a risk of dripping liquid. At least the tip side of the nozzle cylinder 60 is formed in an inclined cylindrical part 66 extending obliquely downward toward a downstream direction.SELECTED DRAWING: Figure 1