| 摘要 |
PURPOSE:To make a time correction mechanism accurate and miniature by constituting a switching mechanism, which engages with a crown at a push-in position and pull-out position from its normal position, with time correction direction made opposite. CONSTITUTION:With the watch slow, pushing crown 3 makes mandarinduck pin 4b in contact with switch member 6 to send a fast advance time correction signal of 1 Hz from AND gate 20, which causes step motor driver circuit 24 via step-motor clockwise turn control circuit 22 to put the step motor into clockwise-turn step operation. With the watch fast, on the other hand, pulling crown 3 makes pin 4b in contact with switch member 7 to send a fast advance time correction signal of 1 Hz from AND gate 21, which causes step-motor driver curcuit 24 via step-motor counterclockwise turn control circuit 23 to put the step motor into counterclockwise turn step operation of 1 Hz. Consequently, the accurate and miniature time correction mechanism can be obtained. |
