JP3235166B2 - Automotive electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electrical equipment for vehicles.

[0002]

2. Description of the Related Art In recent years, in-vehicle electrical devices have been widely used to enhance the functions of automobiles.

Conventionally, this type of on-vehicle electrical equipment has been generally started and stopped by a power supply wiring configuration as shown in FIG.
Hereinafter, the configuration will be described with reference to the drawings.

[0004] As shown in FIG.
In-vehicle wiring 4 via CC switch 2 and power switch 3
Is connected to the battery 1. The switch 8 is a power switch for electrical equipment that does not pass through an ignition switch or an ACC switch installed on the vehicle body.

[0005] With the above configuration, only when the engine key is inserted and the ACC switch is ON, the on-vehicle electrical equipment 5 is started and stopped by opening and closing the power switch 3.

[0006]

In such a conventional power supply wiring configuration, in-vehicle electrical equipment is installed on a vehicle body so as to operate only when the automobile is driving, in order to prevent the battery from running out. In this case, a dedicated wiring in the vehicle body for connecting the ACC switch to the vehicle-mounted electrical equipment main body was required.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a vehicle-mounted electric device which can perform power supply wiring without using the dedicated wiring.

[0008]

In order to solve the above problems, the present invention provides an ignition switch or an ACC switch.
Turn ON / OFF the device connected to the battery via switch
DC power that is electrically connected between the terminals of the FF switch
Pressure transmitting means, and an electric connection between the switch and the device.
A voltage detection circuit for detecting a voltage applied to the power supply line;
The ignition switch or ACC switch
Of other devices that are electrically connected without any of the switches
One end is connected to a power line, and the voltage detection circuit is
The operation of the in-vehicle electrical equipment main unit is input according to the output of
And a power switching circuit for switching off.

[0009]

According to the present invention, whether the ignition switch or the ACC switch of the vehicle is turned on by using the existing power supply wiring to another device via the ignition switch or the ACC switch installed on the vehicle body is determined. Knowing that you can open and close the power supply for in-vehicle electrical equipment ,
If only installing the electrical equipment-vehicle actuating, it need not be attached a new dedicated wiring, also, the battery
Can also be prevented .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a vehicle-mounted electric device according to the present invention.

FIG. 1 shows a basic configuration of a power supply wiring of a vehicle-mounted electric device according to the present invention. In FIG. 1, one end of a power supply line of a vehicle electrical equipment main unit 7 is connected to a power supply wiring of another device 6 that does not pass through an ignition switch or an ACC switch at the rear of the vehicle body, for example, a lighting lamp in a rear trunk. The on-vehicle electrical equipment main unit 7 includes a voltage detection circuit 10, a power switching circuit 11, and a control circuit 12. 13 is a DC voltage transmission device, 9 is another device via an ignition switch or an ACC switch installed on the vehicle body, and 14 is an open / close switch provided on a driver's seat. 2 is an ignition switch or ACC switch, and 1 is a battery for power supply.

As shown in FIG.
Has one end connected to the battery 1 via an ignition switch or an ACC switch 2 and the other end connected to a load-side terminal of a switch 14. The input of the voltage detection circuit of the in-vehicle electrical equipment main unit 7 is the switch 1
4 is connected to the power supply wiring of the device 9 connected to the common terminal 4, and its output is connected to the power supply switching circuit 11.
The voltage detection circuit 10 is configured to drive the power switching circuit 11 when the input voltage is higher than a reference potential set lower than the output of the battery 1 and the DC voltage transmission device 13.

The operation of the above configuration will be described.
When the ignition switch or the ACC switch 2 is closed, the voltage of the battery 1 when the switch 14 of the device 9 is ON, and the output voltage of the DC voltage transmission device 13 when the switch 14 of the device 9 is OFF, respectively . The voltage is applied to the voltage detection circuit 10 and the voltage is
Since the potential is higher than the predetermined reference potential, the voltage detection circuit 10 drives the power supply opening / closing circuit 11 and drives the in-vehicle electrical equipment main unit 7. When the ignition switch or the ACC switch 2 is opened, the potential of the power supply wiring of the device 9 becomes zero, so the voltage detection circuit 10 turns off the power supply switching circuit 11 and puts the in-vehicle electronic device main unit 7 into a stopped state. .

FIG. 2 shows a more specific embodiment of the DC voltage transmission device 13 of the present invention. DC voltage transmission device 13
Is constituted by a fixed resistor 15, the output of which is connected to the device side terminal of the switch 14. Switch 14 is O
In the case of the FF, the battery voltage is fixed to the fixed resistor 15 and the device 9.
And the output voltage of the DC voltage transmission device 13 is obtained. Since the reference voltage of the voltage detection circuit 10 is set to be equal to or lower than this voltage, the power switching circuit 11 is turned on.
Then, the control circuit 12 is driven.

That is, the ignition switch or A
If a DC voltage transmission device is added to the power switch of another device via the CC switch and installed near the driver and its power wiring is used, the vehicle-mounted electrical equipment main unit 7 can be installed anywhere on the vehicle body. In addition, there is no need to provide dedicated wiring when installing onboard electrical equipment.

Although this embodiment has been described using a fixed resistor as the DC voltage transmission device, it is apparent that similar results can be obtained by using another DC voltage conversion circuit.

[0017]

As described above, according to the present invention, the ignition switch or the ACC switch of the automobile is opened or closed by using the power supply wiring of another device via the ignition switch or the ACC switch at the rear of the vehicle body. It can be detected by connecting a DC voltage transmitting device to a switch of the device, so that the on-vehicle electrical device can be driven and stopped without using a dedicated wiring.

[Brief description of the drawings]

FIG. 1 is a power supply wiring diagram of an on-vehicle electrical device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an embodiment of the DC voltage transmission device.

FIG. 3 is a power supply wiring diagram of a conventional in-vehicle electrical device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Battery 2 Ignition switch or ACC switch linked to engine key 3 Power switch for on-vehicle electrical equipment 4 Body power supply wiring 5 In-vehicle electrical equipment 7 In-vehicle electrical equipment main unit 9 Power line via ignition switch or ACC switch Equipment having 10 Voltage detection circuit 11 Power switching circuit 12 Control circuit 13 DC voltage transmission device

Claims (1)

(57) [Claims] 1. An ignition switch or an ACC switch.
Turn ON / OFF the device connected to the battery via switch
DC power that is electrically connected between the terminals of the FF switch
Pressure transmitting means, and an electric connection between the switch and the device.
A voltage detection circuit for detecting a voltage applied to the power supply line;
The ignition switch or ACC switch
Of other devices that are electrically connected without any of the switches
One end is connected to a power line, and the voltage detection circuit is
The operation of the in-vehicle electrical equipment main unit is input according to the output of
In- vehicle electrical equipment equipped with a power switching circuit that switches on and off .