JPH03186440A - Automobile headlamp circuit - Google Patents

Abstract

PURPOSE:To ensure safety driving despite breaking of a bulb by detecting a circuit for its cutoff due to generation of breaking in the main bulb and selecting it to a spare bulb in a spare circuit while lighting a display part to display the bulb breaking. CONSTITUTION:When switches 7a, 7b are closed by turning on a lighting switch 7 of a headlamp by a driver, power from a battery 3 is supplied to a main bulb 5 with the headlamp turned on. The main bulb 5 is broken under this condition, when a main circuit is detected to be cutoff by a bulb break detecting circuit 1, a switch 2 in a spare circuit is turned on to supply the power of the battery to a spare bulb 6 with a spare headlamp turned on. While a display part 4 is also electrified and lighted so as to display use of the spare circuit to the driver.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an automobile headlamp circuit, and in particular to automatically turning on a spare headlamp bulb when a headlight bulb burns out. This invention relates to an automobile headlight circuit that can perform

[Prior Art] Generally, automobile headlight circuits turn on the headlights to illuminate the front of the vehicle at night, etc. However, conventional headlight circuits suffer from deterioration, etc.:') Headlights Even if the bulb burned out, it was not possible to change the bulb while driving.

[Problems to be Solved by the Invention] With the conventional headlight circuit, when a light bulb burns out at night, the light bulb cannot be replaced while the vehicle is running, which may lead to insufficient illuminance in front of the vehicle, which may pose a driving hazard. was there. In particular, if a headlight bulb burns out while driving on a highway, the problem is that it poses a great danger because the vehicle must drive at high speed over long distances.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the problems caused by the prior art, and to provide an automobile headlamp circuit that automatically detects a burnout of a headlamp bulb and lights up a spare bulb.

[Means for Solving the Problems] In order to achieve the above object, an automobile headlamp circuit according to the present invention includes a battery that supplies power, a main light bulb that is lit by the power supply, and a burnout of the main light bulb. A main circuit section in which a light bulb burnout detection section is connected in series, a spare light bulb that is turned on by power supply, a switch section that forms a closed circuit when the detection section detects that the light bulb burns out, and a battery are connected in series. and a display section that lights up when power is applied to the spare bulb to warn the driver to turn on the spare bulb.

[Function] In the automobile headlamp circuit, the light bulb burnout detection section detects that a light bulb burnout occurs in the main light bulb of the main circuit, and upon this detection, the backup circuit operates the switch section to turn on the backup light bulb. At the same time, the display section lights up.

Therefore, the automobile headlamp circuit according to the present invention lights up the spare bulb and the display section when the main bulb burns out.
It is possible to prompt the driver who keeps the headlight on and to change the bulb.

[Example 1] Hereinafter, a first embodiment of an automobile headlamp circuit according to the present invention will be described.
This will be explained in detail using figures.

FIG. 1 is a diagram for explaining the circuit configuration of an automobile headlamp circuit according to one embodiment of the present invention, and this circuit includes a battery 3. 5. A main light bulb that is lit by power supplied from the battery 3. A main circuit that forms a closed circuit via a switch 7a of a light bulb burnout detection circuit section 1 and a lighting switch section 7, which will be described later, and a switch 7b that interlocks with the switch 7a.

A spare circuit is formed by a switch part 2 that opens and closes according to instructions from the light bulb burnout detection circuit part 1 and a spare light bulb 6, and is connected in parallel to the main circuit and battery 3, and lights up when the spare circuit is electrically connected. It is composed of the switch section 2 and the display section 4 which is grounded between the switch section 2 and the spare light bulb 6.

The lighting switch unit 7 is a headlight switch that operates in conjunction with switches 7a and 7b, and is operated by the driver to close the switches 7a and 7b and turn on the headlights.

In addition, the light bulb burnout detection circuit section 1 closes the switch 2 and switches to a backup circuit by detecting a current drop, etc. when a circuit break occurs due to a burnout of the main light bulb 5. Furthermore, the display section 4 is for displaying to the driver that the switch has been made to the backup circuit, that is, that the backup light bulb 6 has been turned on. Further, a spare light bulb 6 is provided alongside the main light bulb 5 and inside the headlight.

Now, in the automobile headlight circuit configured in this way, when the driver turns on the headlight lighting switch 7 and closes the switches 7a and 7b at night, etc., power from the battery 3 is transferred to the main light bulb 5. is supplied, and the headlights start turning on.

At this time, the spare light bulb 6 is off because the light bulb out detection section 1 detects main circuit continuity and turns off the switch section 2. The display section 4 is also in an off state.

If the main light bulb 5 burns out in this state, the light bulb burnout detection circuit 1 detects the interruption of the main circuit and turns on the switch 2 of the backup circuit, so that power from the battery 3 is supplied to the backup light bulb 6. When the spare headlight is turned on, the display section 4 is also turned on to indicate to the driver that the spare circuit is being used.

Therefore, in this circuit, when the main bulb 5 burns out,
The spare bulb 6 lights up to continue illuminating the front of the vehicle to ensure safe driving, and the display unit 4 warns the driver that the main bulb is burnt out, prompting him to replace it.

Furthermore, even if the secondary light bulb 6 also burns out because the display section 4 is not directly connected to the spare light bulb 6, the display section 4 can continue to be lit to prompt the driver to replace the light bulb. can.

In this embodiment, a single battery 3 is used as the power source for both the main circuit and the backup circuit, but in case the battery is exhausted or the wiring is cut, a separate battery and wiring from the main circuit may be provided. Also good.

[Effects of the Invention] As described above, according to the present invention, it is detected that the circuit is interrupted due to a burnout in the main light bulb (7), and the display is turned on and the display section is turned on to notify the driver. It is possible to provide an automobile headlight circuit that indicates whether a light bulb is burnt out, thereby ensuring safe driving by keeping the headlight on, and prompting the driver to replace the light bulb.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining an automobile headlamp circuit according to an embodiment of the present invention. 1: Light bulb out detection section, 2: Switch section, 3: Battery,
4: Display section, 5: Main light bulb, 6: Spare light bulb, 7: Lighting switch section, 7a and 7b: Switch.

Claims (1)

[Claims] An automobile headlamp circuit that lights up a headlamp that illuminates the front of a car includes a battery that supplies power, a main light bulb that is turned on by the power supply, and a light bulb burnout detection section that detects burnout of the main light bulb. A main circuit part connected in series, a spare light bulb that lights up when power is supplied, a switch part that forms a closed circuit when the detection part detects a burnout of the light bulb, and a spare circuit part in which a battery is connected in series, and a spare light bulb that is connected in series to the spare light bulb. A display section is provided that lights up when power is applied to warn the driver that a spare bulb should be turned on.If the main bulb of the main circuit burns out, the backup circuit operates the switch section according to instructions from the detection section to turn on the spare bulb. An automobile headlamp circuit characterized in that it lights up a display part as well as lights up a display part.