| 摘要 |
PURPOSE:To ensure safety by issuing warning sign for unlock status of door by detecting said status if any, in the condition ready for running in a car having doors which can be locked separately. CONSTITUTION:Unlock detecting switches 3... which are installed on pulral doors, become Off in a lock condition, and become H in an unlock condition and are input in an electric circuit block 1. An engine switch 2 is made On and a car becomes ready for running, and H signal by the ON is also input into an electric circuit block 1. The car is ready for running now, but if any door is not locked, AND condition of a logic circuit 6 becomes effective by both H signals and a warning lamp 4 is lighted through a driving transistor 7 by the output. If it is locked, AND condition is ineffective and the lamp is put off. If unlock condition continues while running, the warning is very effective as the warning lamp continues to stay on. |
