Fluid transport device

A fluid transport device having

• one drive source,
• a pump configured to rotate around a shaft center by a driving force of the drive source, thereby transporting a fluid, and
• a plurality of flow passage members for transporting the fluid through the pump, wherein:
• the pump includes a squeezing member configured to rotate around the shaft center, and a tube member constituting parts of the plurality of flow passage members,
• the squeezing member includes a roller attached thereto so as to be movable between a squeezing position to which the roller is moved in a state where the roller has been advanced so as to be able to press the tube member, thereby squeezing the tube member, thereby transporting the fluid, and a release position to which the roller is moved in a state where the roller has been retracted so as not to press the tube member, thereby stopping transport of the fluid, and configured to be positioned at the squeezing position, thereby squeezing the tube member, thereby transporting the fluid, if the squeezing member rotates in one direction around the shaft center, and be positioned at the release position, thereby stopping transport of the fluid, if the squeezing member rotates in the other direction opposite to the one direction around the shaft center, and
• the fluid transport device includes
• a flow passage selector having operating members provided so as to be movable between a closing position for closing internal flow passages of the flow passage members, and an opening position for opening the internal flow passages of the flow passage members, and an eccentric cam configured to rotate, thereby moving the operating members between the closing position and the opening position, thereby opening and closing the internal flow passages of the flow passage members, and
• a one-way clutch provided between the squeezing member and the eccentric cam, and configured to regulate transmission of rotation of the squeezing member to the eccentric cam, thereby stopping the eccentric cam, thereby maintaining the positions of the operating members, if the squeezing member rotates in the one direction, and transmit rotation of the squeezing member to the eccentric cam, thereby rotating the eccentric cam, thereby changing the positions of the operating members, if the squeezing member rotates in the other direction.