| 摘要 |
<p>PURPOSE:To improve the operationability by providing a plurality of command switch groups on the steering handle of a car while connecting to the control circuit responsive to each switch through single common path thereby enabling the arrangement of many switch groups on the handle. CONSTITUTION:When the switches S1-S5 are off, the horn 2 and the control circuit 7 are disabled. While when the switches S1-S3 are on, the resistance of the resistors R1-R3 are higher than the impedance of the horn 2, thereby the horn 2 is disabled. Upon turning on the switch S4, the horn 2 will function through a relay 3, contact 4, slip ring 5 and the switch 4. Upon turning on the switch S5, the control circuit 7 will turn on. When the switches S1-S4 are off, the relay 3 is driven to disconnect the signal line from the horn 2. Here the signals are provided from the switch S1 to the terminal 8a of the load 8, from the switch S2 to the terminal 8c, from the switch S3 to the terminal 8d and from the switch S4 to the horn 2. Consequently the switch group arranged on the handle can be operated.</p> |
