Patent ID: 8986255
Filing Date: 2015-03-24
Classification: A61M,F04B

Abstract:
1. A fluid transport cartridge comprising: a fixing portion for fixing the fluid transport cartridge in a detachable manner to a fluid transport driving unit including a cam; a first elastic tube that transports a first fluid; a second elastic tube that transports a second fluid; a third elastic tube that transports the first fluid or the second fluid; a switching valve that selectively guides one of the first fluid and the second fluid to the third elastic tube; a plurality of pressing pins that are arranged along the third elastic tube in a transport direction of the fluid transported by the third elastic tube and that each move between a first position in which a transport path of the fluid transported by the third elastic tube is constricted by pressing on the third elastic tube from outside and a second position in which the transport path of the fluid transported by the third elastic tube is not constricted; a cam housing portion that, when the fluid transport cartridge is fixed to the fluid transport driving unit by the fixing portion, houses the cam of the fluid transport driving unit such that the cam is operable to move the plurality of pressing pins; and a through-hole that engages with a convex portion that protrudes from an attachment surface of the fluid transport driving unit and has an arc shape with a circle of the arc being centered on a rotational center of the cam when the cam is housed by the cam housing portion, wherein the plurality of pressing pins are arranged radially with respect to the rotational center of the cam when the cam is housed by the cam housing portion, the fixing portion fixes the fluid transport cartridge such that the fluid transport cartridge as a whole can be attached to and detached from the fluid transport driving unit without changing a tension of the third elastic tube, and when the cam housing portion is not housing the cam, the plurality of pressing pins do not press on the third elastic tube.