| 摘要 |
<p>PURPOSE:To lengthen an available time required for an exchanging operation by switching a driving by a maim battery to that by an auxiliary battery at the time of exchanging the main battery, and holding a conserved power driving state during the exchanging operation of the main battery. CONSTITUTION:When a lock mechanism for exchanging a main battery 21 is released, a limit switch 27 is turned off, and a signal generator 60 generates a conserved power signal 28. A CPU 11 receives the conserved power signal 28, and transits a main circuit 10 to the conserved power state. The main circuit is driven in the conserved power driving state after a power is supplied from an auxiliary batter 23. When the main battery 21 is loaded in a battery holder, and the lock mechanism is set, the limit switch 27 is turned on, and the signal generator 25 of a monitoring circuit 25 generates a conserved power releasing signal 29. The CPU 11 turns the main circuit 10 to be always in a driving state in response to the signal 29. At the time of driving the auxiliary battery, the conserved power driving state is held, so that the consumption of the auxiliary battery can be reduced, and an available main battery exchanging time can be lengthened.</p> |
