| 摘要 |
PURPOSE:To enable a car driver to take rest on a long way drive or to easily sleep for a while by adding alarm function to a clock built in a car. CONSTITUTION:For a clock having timer function for operating an alarm generation function besides an ordinary clock function at an arbitrary set time, a timer function 4 and an alarm generation device 3 are provided with a switch device 6 controlled by a speed detection device 1 detecting the running speed of the car while making the switch device 6 close only in the stop state of the car to avoid the operation of the alarm device during running of the car. |
