| 摘要 |
PCT No. PCT/JP90/00461 Sec. 371 Date Oct. 25, 1991 Sec. 102(e) Date Oct. 25, 1991 PCT Filed Apr. 5, 1990 PCT Pub. No. WO90/13842 PCT Pub. Date Nov. 15, 1990.A laser scanner driving device has a piezoelectric actuator which acts through a lever to rotate a drive shaft against the force of a plunger which is biased by a reaction spring. The drive shaft is the input to a displacement amplifier. A laser beam deflecting mirror is mounted on the output shaft of the displacement amplifier. In order to reduce the effect of friction on the conversion of the rectilinear displacement of the piezoelectric actuator into the rotational displacement of the mirror and to avoid non-coaxial reaction forces on the piezoelectric actuator, at least one rotatable contactor is provided between the free end of the piezoelectric actuator and the lever and at least one rotatable contactor is provided between one end of the plunger and the lever.
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