Importance

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Abstract

The present invention is related to an infusion pump cassette to deliver fluids with a tube and the like, and obtains a configuration for switching between a free flow state and a lock state in a simple manner by using components which are originally required for liquid infusion. There are provided a ring 13 that is installed in a position between the ring 13 and an inner wall surface 121 across a tube 20 in an inner space 120 and is movable in a radius direction extending radially from an axis; and an eccentric pin 15 that is movable to an infusion position (A) and a release position (B) which are different in a direction of the axis, that has an eccentric shape in which, when being at the infusion position (A), the eccentric pin 15 presses the ring 13 from an inside of a ring thereof in a direction of the radius direction so as to press the tube 20 against the inner wall surface 121 by the ring 13 to squeeze the tube 20, and when being at the release position (B), the eccentric pin 15 releases the ring 13 from the pressing so as to release the tube 20 from the squeezing, and that, when being at the infusion position (A), receives a rotation drive force from a motor to rotate about the axis so as to send a fluid in the tube 20 out via the ring 13.

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First Claim