A tube pump (1A) 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.
