| 摘要 |
PURPOSE: To provide an excellent liquid injection pump which is free from liquid drip and can prevent the drying and solidification of the liquid. CONSTITUTION: In a push-down head type liquid injection pump, given that the internal volume of a nozzle 24 is Va, the internal volume of the passage of a vertically movable part of a delivery valve body 31 is Vb and the volume of the delivery valve body 31 is Vc, the vertical moving width of the delivery valve body 31 is so regulated that Vb...Vc are the same as or greater than Va. In addition to this structure, an elastic member 16 acts to normally bias the body of a suction valve 9 to a valve hole closing direction. |
