| 摘要 |
<p>PURPOSE:To prevent a battery from being worn out by turning off a power supply of a stepper motor when a timer counts up a prescribed time. CONSTITUTION:The tachograph is provided with a switch means 1 turning on/off a current of a stepper motor moving a recording stylus corresponding to a job block, a timer 2 counting a prescribed time, and a switch drive means 3 driving the switch means 1 when the timer 2 counts a prescribed time to turn off the power supply. And, the switch drive means 3 activates the switch means 1 when the timer 2 counts a prescribed time to turn off the power supply of the stepper motor. Moreover, the timer 2 starts count when an ignition switch of a vehicle is turned off. Furthermore, the timer 2 is reset when the job block is revised and starts count. The current supply from the battery of the vehicle is stopped to prevent the battery from being worn out by activating the timer 2 in this way and turning off the power supply of the stepper motor when the timer 2 counts a prescribed time.</p> |
