JPH0268689U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is an end view showing a piezoelectric rotary drive device according to an embodiment of the present invention with the bracket omitted, Fig. 2 is a cutaway view taken along the AOB fold line in Fig. 1, and Fig. 3 is a voltage diagram of the embodiment. Time charts showing the application timing and FIGS. 4a, 4b, and 4c are explanatory diagrams showing the operating state of the embodiment. In the drawing, 1 is a fixed ring, 2 is a vibration ring, 3
a, 3b, 3c, 3d, 3e, and 3f are laminated piezoelectric actuators, 4 is a rotor shaft, 5 is a lining material, G is a gap, and g is a gap.

Claims (1)

[Scope of utility model registration request] A highly rigid fixed ring, a vibrating ring that elastically deforms in the radial direction and is arranged concentrically with a gap on the inner circumference of the fixed ring, and fixed as a pair facing each other with the vibrating ring in between. A plurality of pairs of piezoelectric parts are placed between the ring and the vibrating ring and expand and contract along the radial direction in response to changes in applied voltage, and the vibrating ring is connected to the vibrating ring via a gap smaller than the amount of elastic deformation of the vibrating ring along the radial direction. A piezoelectric rotary drive device comprising an inserted rotor shaft.