| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump device capable of increasing pressing force of a roller pressing a tube obtained by biasing force of a biasing member oscillating an oscillating member.SOLUTION: A pump device comprises: a roller 36 having a roller shaft 36a movably held along a bending hole 34, revolving about a pump shaft 31 as a rotating member 32 is rotated, and moving between a first position at which a tube 26 supported at an inner wall surface is pressed by the movement of a roller shaft along the bending hole in conformity with a rotation direction of the rotating member and a second position at which the pressing force applied to the tube is more relaxed than the pressing force at the first position; and a coil spring 41 biasing an oscillating member in a direction in which the roller approaches the tube supported at the inner wall surface. The first position is closer to an oscillation shaft 33a of the oscillating member than the second position. |
