To miniaturize a traveling mechanism by equipping a ceramic vibrator for exhibiting operation force based on vibration, a mobile unit that is moved by the operation force, and a detection means for detecting the traveling position of the mobile unit.
In a ceramic vibrator 13 of a lens-traveling mechanism 1, first synthesis vibration is generated when an AC voltage is applied via electrodes P1, P2, Q1, and R1 from an AC power supply, a crimp plate 5 is fed forward, and a mobile unit 4 is guided by guides 9 and 9 for traveling forward. Also, when an AC voltage is applied via the electrodes P1, P2, Q2, and R2, second synthesis vibration is generated, the crimp plate 5 is fed rearward, and the mobile unit 4 is guided by the guide shafts 9 and 9 and are moved rearward. Then, the traveling position of the mobile unit 4 is detected by a detection means 21 consisting of a detection plate 14 and a plate 6 to be detected, thus eliminating the need for a lead screw with length exceeding the traveling range of the mobile unit and hence miniaturizing a lens traveling mechanism by that amount.
KAYAMA TAKASHI
KATAOKA YASUHIRO
NOJI TAKAYOSHI
INOUE MICHIO
TAMRON KK