JPS586737Y2 - Headlight lighting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a headlight lighting device for a vehicle, and in particular, the present invention relates to a headlight lighting device for a vehicle, and in particular, a front headlight that can dim the headlights or turn them on normally by selecting an operation switch to ensure safe driving of the vehicle. The present invention relates to a lighting device.

2. Description of the Related Art When a vehicle traveling on a road temporarily stops on the road in accordance with a signal displayed by a traffic light, the headlights of a vehicle are dimmed from the viewpoint of traffic safety.

However, since the headlights are generally turned off when vehicles are driving during the day, it is difficult for oncoming vehicles to recognize the presence of their own troops, which is extremely inconvenient in terms of ensuring safe vehicle driving. Although a solution to this problem has been desired, there is still no accurate and easy means for achieving it.

On the other hand, when dimming the headlights, a relay is generally controlled to switch the headlights, and in many cases, the headlights are dimmed or turned off when the relay coil is energized. is taken.

Therefore, during normal lighting when the headlights are turned on at the rated voltage, the relay coil becomes non-conductive (OFF), and as a relay contact, its contact pressure is low, and it has the disadvantage that it can be separated instantaneously due to vibrations when the vehicle is running. This is a very dangerous situation for drivers.

In view of the above points, the present invention has been developed to solve these problems and eliminate such drawbacks, and its main purpose is to realize a headlamp lighting device that can ensure safe driving of a vehicle. It is in.

Another object of the present invention is to provide a headlamp lighting device that operates reliably and stably.

In order to achieve these objectives, the present invention has developed a Y-connection midpoint terminal of an alternator that generates three-phase alternating current in a Y-connection fixed coil by rotating a magnetic pole that is excited by current from a power source. A power source for dimming, a detection circuit for detecting whether the vehicle is stopped or running, and a rated power source that is controlled based on the output of this detection circuit and whose normally open contacts normally turn on the headlights. a headlamp connected to the dimming power supply through a normally closed contact of the relay and a headlamp switch in series, and a first contact connected to the output side of the detection circuit. and a second contact connected to the relay, a third contact that is not connected, and a common contact that grounds at least the first and second contacts, and the common contact and the third contact are closed when the vehicle is stopped. At times, the headlights are connected to a dimming power supply through the normally closed contacts of the relays to dim the headlights, and when the vehicle is restarted, the headlights are connected to the dimming power source through the normally open contacts of the relays. Connect to the above rated power supply to turn on the headlight normally, and when the common contact and the first contact are closed, ground the output side of the detection circuit to reduce the headlight regardless of whether the vehicle is running or stopped. The vehicle is equipped with a selection operation switch that causes the headlight to turn on, and grounds one end of the relay when the common contact and the second contact are closed so that the headlight is normally lit regardless of whether the vehicle is running or stopped. Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing an embodiment of a headlamp lighting device according to the present invention.

In the figure, E is the power source (battery) and TS is the tail.
One end of this tail switch TS is connected to the positive side of battery E, and the other end is connected to the negative side (ground) of batch IJ-E through resistor R1 and vehicle speed sensor SS in series.
It is connected to the.

Here, the vehicle speed sensor SS constitutes means for detecting whether the vehicle is stopped or in a running state.

Tr,, Tr2 are NPN transistors for switching, MS is an operation switch for selection, and this operation switch MS has a common contact piece A whose one end is grounded, and contacts B connected to this common contact piece A, respectively. It is composed of C and D.

RL is a relay, rt is a contact of relay RL, and this contact r
t consists of a common contact X and contacts Y and Z, and the common contact X is a headlamp switch H8 and a D7 switch D.
The main light HLt and the auxiliary light HL2 of the headlights are connected through S in series.
The contact Y is connected to the positive side of the batch IJ-E, and the contact 2 is connected to the N terminal of the alternator ON.

Here, the alternator ON is an alternator that generates three-phase alternating current in a Y-connected fixed coil by rotating the magnetic pole excited by the current from the battery, rectifies it with a diode, and supplies it to the terminal N. is the midpoint terminal of the Y-connection that outputs power for dimming.

The collector of the transistor Tr1 is connected to the positive side of the battery E via the tail switch TS, the emitter is connected to the base of the transistor Tr2 via the resistor R3, and the base of the transistor Trl is connected to the diode DI and the capacitor C1 in series. It is connected to the connection point between the resistor R1 and the vehicle speed sensor SS via the resistor R1.

Further, the connection point between the capacitor C1 and the diode DI is grounded via a resistor R2, and the connection point between the diode Dt and the base of the transistor Trl is grounded via a capacitor C2.

On the other hand, the collector of the transistor Tr2 is connected to the tail switch TS via the relay RL, and the emitter is grounded.

Further, the base of the transistor Tr2 is grounded via a bias setting resistor R4.

And diode D2 connected in parallel with relay RL
is provided to absorb back electromotive force.

Further, the contact B of the operation switch MS is a transistor Tr1.
The contact point is connected to point d, which is the connection point between relay RL and the collector of transistor Tr2.

Note that the contact C is not connected and is at the neutral point. FIG. 2 is a waveform diagram for explaining the operation of the headlamp lighting device shown in FIG. 1, and shows the output waveform of the dimming power source obtained from the N terminal of the alternator ON.

In the figure, V indicates its peak voltage, and this voltage V is lower than the rated voltage supplied from batch IJ-E.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to FIG. 2.

First, a case will be described in which the common contact A of the selection operation switch MS is closed with the contact C, the tail switch TS is on, and the headlamp switch H8 is on while the vehicle is running.

A square wave signal is generated at point a by turning on and off the vehicle speed sensor SS. This signal is differentiated by capacitor C+, and this differentiated signal obtained at point b is passed through diode D and immediately applied to capacitor CI. Let it charge.

Then, the charging voltage of the capacitor C3 turns the transistor Trl on, and based on this, the transistor Tr2 turns on, thereby exciting the relay RL.

When relay RL is energized, its relay contact rt is switched, the common contact X and contact 7 are closed, and the main headlight H
L.

Or the auxiliary light HL2 lights up normally at the rated voltage.

When the vehicle is stopped, the detection signal generated by turning on and off the vehicle speed sensor SS does not output, so the transistor T
Since rlTr2 are both off, relay RL is not energized, and the connection between common contact X and contact 2 of relay contact rL is closed, and headlamp switch H8 is not connected to main headlight HL1 or auxiliary headlight HL2. Alternator ON terminal N via
An output voltage having a waveform as shown in FIG. 2 is supplied from the source, and the light is dimmed.

Here, the voltage supplied from the N terminal of the alternator ON is lower than the rated voltage supplied from batch IJ-E.

In this way, when driving, common contact X and contact Y at contact rL of relay RL are closed, and the headlights are turned on normally. - When stopped, contact rt of relay RL is restored, and common contact X and contact Y are closed. Contact Z is closed, and the headlights are turned on at a reduced level.

Thus, when the vehicle is stopped, the headlights are automatically dimmed and turned on, and when the vehicle is restarted, they are immediately turned on normally.

Next, when the common contact A of the selection operation switch MS is closed with the contact B, the point C is grounded, so the transistors Tr l p Tr 2 are both off, and the relay RL is Since it is not energized, the connection between the common contact X of the contact rt and the contact 3 is closed, and when the headlamp switch HS is turned on, the headlight is dimmed and turned on both when the vehicle is running and when the vehicle is stopped.

In this way, the headlights are always dimmed and lit regardless of whether the vehicle is running or stopped.

Next, when the common contact A of the selection operation switch MS is closed, the point d is grounded, so the relay RL detects that the vehicle is stopped and running. Regardless of the presence or absence of the output of the detection circuit, it is energized, the contact rt's common contact It lights up normally.

As is clear from the above, the present invention is capable of automatically dimming the headlights and turning on the headlights when the vehicle is stopped and restarting by selecting the operation switch MS while the vehicle is driving at night with the headlight switch HS on. As a result, the light turns on normally.

■ Always turn on the headlights in a dimmed manner, regardless of whether the vehicle is moving or stopped.

■ Always turn on the headlights normally, regardless of whether the vehicle is moving or stopped.

It has three control functions.

As explained above, according to the present invention, the headlights can be automatically dimmed and turned on when the car is stopped, and can be turned on normally when the vehicle is restarted. In addition, the headlights can be dimmed, and if necessary, the headlights can be turned on normally regardless of whether the vehicle is running or stopped, ensuring safe driving of the vehicle, so the practical effects are extremely significant.

In addition, when the headlights are normally lit, they are configured to remain lit by relay energization or operation switches, so they are not affected by vibrations when the vehicle is running, so there is no possibility of malfunction. It is also extremely effective in that reliable and stable lighting operation can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a headlamp lighting device according to the present invention, and FIG. 2 is a waveform diagram for explaining the operation of the device shown in FIG. 1. H8...Headlight switch, HLr,
RL2...Headlight, ON...Alternator, N...Middle point terminal, MS...Operation switch, SS...Vehicle speed sensor ,RL...
...Relay rl...Relay contact.

Claims (1)

[Scope of utility model registration request] A power source for dimming that has a midpoint terminal of the Y-connection of an AC generator that generates three-phase alternating current in a Y-connection fixed coil by rotating the magnetic poles excited by the current from the power source, and when the vehicle is stopped or running. a detection circuit that detects that the
a relay connected to a rated power supply that is controlled based on the output of the detection circuit and whose normally open contact turns on the headlights normally;
A headlamp connected to the dimming power source through a normally closed contact of the relay and a headlamp switch in series, and a first contact connected to the output side of the detection circuit and a headlamp switch connected to the relay. A second contact, an unconnected third contact, and a common contact that grounds at least the first and second contacts, and when the common contact and the third contact are closed and the vehicle is stopped, the headlight is connected to the The relay is connected to a dimming power source through a normally closed contact to turn on the headlight in a dimmed state, and when the vehicle is restarted, the headlight is connected to the rated power source through a normally open contact of the relay. The headlights are turned on normally,
When the common contact and the first contact are closed, the output side of the detection circuit is grounded to turn on the headlight in a dimmed manner regardless of whether the vehicle is running or stopped; and when the common contact and the second contact are closed, A headlamp lighting device comprising: a selection operation switch that connects one end of the relay to ground and causes the headlamp to normally turn on regardless of whether the vehicle is running or stopped.