发明名称 Moving driving device of camera
摘要 The motor drive device according to the present invention drives a motor until a hold signal disappears and the motor is braked when the holding signal disappears. After a predetermined period from the time when the holding signal disappears, it is detected whether or not a completion position signal representing that the load has reached the normal complete position is output. If the completion position signal is not output, the motor is started again. The load is driven until the load reaches the position where the completion position signal is output, and then the motor is braked. Thus the load can be stopped at the correct position. Also, with the motor drive device according to the present invention, the motor may be braked after the load is driven by a predetermined amount. After a predetermined period has passed therefrom, it is detected whether or not a signal representing that the load is normally driven is output, and if the signal is not ouput, the motor is started again. The load is driven until the signal is output and then the motor is braked. Thus, the load can be correctly driven.
申请公布号 US4849779(A) 申请公布日期 1989.07.18
申请号 US19880169449 申请日期 1988.03.17
申请人 MINOLTA CAMERA KABUSHIKI KAISHA 发明人 YAMAMOTO, KOUJI;TOMINAGA, SHINJI;YAMANAKA, AKIRA;UEDA, HIROSHI;TANIGUCHI, NOBUYUKI;NAKAMURA, IKUSHI;IWATA, MICHIHIRO
分类号 G03B7/091;G03B7/16;G03B15/05;G03B17/42;(IPC1-7):G03B1/00 主分类号 G03B7/091
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