| 摘要 |
PROBLEM TO BE SOLVED: To precisely and easily dispense liquid chemical by displacing a pressing element for pressing a chamber filled with the chemical, in a housing through thread-engagement. SOLUTION: A chamber 2 having a chemical inlet port 3 and a chemical outlet port 4 is accommodated in a housing 8, and tubes 5, 6 are connected to the inlet port 3 and the outlet port 4, respectively. The chemical reserved in the chamber 2 is discharged from a position B to a position C by pressing the chamber 2 with a pressing member 9. This pressing member 9 is composed of a shaft 12 inserted in a hole 85 formed in the housing 8, a pressing plate 10 and a rotary plate. The shaft 12 is threadly engaged in the hole 85. When the rotary plate 11 is rotated, the shaft 12 is threadly advanced so as to advance the plate 10 for pressing the chamber 2. Accordingly, it is possible to avoid pushing the chamber by a finger from the initiation of discharge of the chemical to the completion of discharge, and therefore, the dispensing of the chemical can be facilitated. Further, since the plate 10 is made into press-contact with the bottom of the container, thereby it is possible to completely discharge the chemical from the container. |
