| 摘要 |
PURPOSE:To prevent a miss of key insertion by providing an alarm means to sound the second alarm when a locking state detection means detects a lock device in a state of locking in the case the first alarm against forgetting key withdrawal is issued. CONSTITUTION:When a door is opened in a state to insert a key into an ignition switch section, a key detection switch 1 and a door switch 2 are turned ON, and transistors 7 and 8 are conducted. An oscillation circuit 5 is oscillated, a transistor 9 intermittently conducts to actuate a buzzer 4, and the first alarm is sounded. A lock prevention device 12 is also actuated by the conduction of the transistors 7 and 8, a lock switch 3 is turned ON when a lock knob of the lock device is tried to push-in, and a transistor 11 conducts. In addition, the value of input resistance is lowered to heighten oscillation frequency, and the second alarm sound having intervals higher than the first alarm sound are issued from the buzzer 4. |
