| 摘要 |
A tube pump ( 1 A) of the present invention is provided with a main body ( 2 ) to which a tube ( 100 ) is attached, a rotor ( 5 ), an oscillator ( 6 ) located so as to touch an outer circumferential face of the rotor ( 5 ), and a plurality of rollers ( 10 ) mounted to the rotor ( 5 ) for pressurizing and thereby squeezing the tube ( 100 ). The oscillator ( 6 ) is essentially shaped like a rectangular plate, and is formed by laminating an electrode, a piezoelectric element, and a reinforcing plate. When an alternating current voltage is applied to the piezoelectric element, the oscillator ( 6 ) oscillates longitudinally in the direction of the length at minute amplitude as the piezoelectric element expands and contracts. The rotor ( 5 ) receives a frictional force and a pressing force from a convex portion ( 66 ) when the oscillator ( 6 ) expands, and the rotor ( 5 ) rotates as it repetitively receives the frictional force and the pressing force. Consequently, it is possible to provide a tube pump having a simple structure, and hence, having an advantage in reducing the size, particularly the thickness thereof.
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