| 摘要 |
PROBLEM TO BE SOLVED: To prevent a hermetically sealed bag from closing the recessed parts of a space-retaining body and smoothly and securely discharge the contents, by alternately and peripherally providing protrusions and recessions twisted from the base end toward the front end, at the outer peripheral face of the space-retaining body. SOLUTION: This pumping device is provided with an actuation part of which upper end is exposed to the outside of a container and a suction part inserted in the inner container with the exception of the upper end. A space- retaining body 57 is fitted to the suction opening. Protrusions 87a-87d and recessions 89a-89d twisted from the base end side to the front end side, are alternately and peripherally provided at the outer peripheral face of the space- retaining body 57. In this way, the suction opening can be always kept open to secure the passage of the contents and completely and securely discharge the whole quantity thereof. |
