JPH0346978Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a retractable headlamp control device that uses a motor to drive retractable headlamps installed on the left and right sides of the front of a vehicle to retract, retract, and expose. The present invention relates to a retractable headlamp control device that controls lamp lighting/extinguishing accordingly.

BACKGROUND ART Conventionally, as a retractable headlamp control device, there is, for example, a technique disclosed in Japanese Utility Model Application Publication No. 119660/1983. In these technologies, the retractable headlamp is turned on and off as well as exposed and retracted based on the operation of a light switch, and there is no technology that automatically turns on and off the retractable headlamp in accordance with the illuminance outside the vehicle.

Problems to be solved by the invention According to the above-mentioned conventional technology, urban areas at dusk,
When driving a vehicle in an area where the illuminance outside the vehicle changes frequently, such as an area where many people go in and out of tunnels, it is troublesome to operate a light switch each time to control turning on and off of headlamps.

Means for Solving the Problems The present invention was devised to solve the above-mentioned problems, and includes a retractable headlamp that is mounted so that it can be retracted and retracted, a motor that drives the retractable headlamp to retract and retract, and a motor that drives the retractable headlamp to retract and retract. A light switch that applies a drive signal to a motor and instructs the retractable headlamp to turn on and off, an illuminance sensor that outputs a signal according to the illuminance outside the vehicle, and when the light switch switches to an automatic on/off stage,
A retractable headlamp, comprising: an automatic lighting control section that controls turning on and off of the retractable headlamp according to the output level from the illuminance sensor and also applies a lamp exposure drive signal to the motor when the retractable headlamp is turned on. Configure the control device.

Operation According to the above configuration, even when the vehicle is traveling in an area where the illuminance outside the vehicle changes frequently, simply by switching the light switch to the automatic on/off stage, the retractable headlamp will appear and disappear according to the illuminance outside the vehicle. Since the lamp turns on and off at the same time, there is no need to worry about turning on and off the lamp.

Embodiment The accompanying drawing shows a preferred embodiment of this invention.

In Figure 1, 1 is a light switch, 2 is a switching section, 3 is a motor circuit, and 4 is a retractable headlamp (hereinafter simply referred to as a "headlamp").
That's what it means. ), 5 is a headlamp relay, 6 is an up drive relay, and 7 is a DC power supply.

Light switch 1 is AOUT (automatic on/off stage),
Switching to the OFF stage, stage (dusk lamp lighting stage), and stage (head lamp lighting stage), and in each stage to the A position (main), B position (damer), and C position (passing). This is a combination type switch that can switch between.

The switching section 2 includes a first switching circuit 21, a second switching circuit 22, a manual switch 23, and a diode circuit 24. The first switching circuit 21 includes a capacitor C1, resistors R1 to R4, a field effect transistor T1, a coil 211a of the down drive relay 211, and a relay contact 211b. Note that the values of the resistors R3 and R4 are set to be larger than the resistors R1 and R2. Further, the second switching circuit 22 includes a capacitor C2, resistors R5 to R8, and a transistor T.
2, the manual switch 23 has fixed contacts 23a, 23b on a first side and fixed contacts 23c on a second side, and has movable pieces 23d, 23e.
The diode circuit 24 is composed of diodes D1 to D8.

The motor circuit 3 includes left and right motors 31 and 32.
It is composed of left and right motor relays 33 and 34 and left and right limit switches 35 and 36. The left and right motor relays 33, 34 have excitation coils 33a, 34a and contacts 33b, respectively.
34b. Also, left limit switch 3
5 is the fixed left sliding contact 35a or the left fourth
As the sliding contact 35d and the left motor 31 rotate, the left first rotation is decelerated by a gear (not shown) and forms a conductive pattern corresponding to the concealed position and exposed position of the left headlamp 41. A pattern 35e to a fourth left rotation pattern 35h are provided. Similarly, the right limit switch 36
is provided with a fixed first right sliding contact 36a to a fourth right rotation pattern 36h.

Here, the left/right second rotation pattern 35
f, 36f and left/right fourth rotation pattern 35h,
36h is a conductive pattern that is always grounded.

The head lamp 4 includes left and right head lamps 41,
42, the left and right head lamps 4
1 and 42 are left and right main filaments 41, respectively.
a, 42a and left and right day muff filaments 41b,
42b.

The headlamp relay 5 is composed of left and right lamp relays 51 and 52, and the left and right lamp relays 51 and 52 are provided with left and right excitation coils 51 and 52, respectively.
a, 52a and left and right relay contacts 51b, 52b.

The up drive relay 6 includes an excitation coil 6a and a contact 6b.

8 is an illuminance sensor that outputs a signal according to the illuminance outside the vehicle.

9 is an automatic lighting control section, and light switch 1
When switching to AOUT (automatic on/off stage), the headlamp 4 is controlled to turn on/off according to the output level from the illuminance sensor 8, and the headlamp 4 is
When the lamp is turned on, a lamp exposure drive signal is applied to the motors 31 and 32. The automatic lighting control section 9 includes a lighting control circuit 91 and three transistors T3 to T5.
and three lighting relays 92 to 94. 10 is a small lamp.

Next, the operation of a preferred embodiment of this invention shown in FIG. 1 will be explained with reference to FIGS. 2 to 5.

(a) At time t1, operate light switch 1 in stages as shown in Figure 2a.

At this time, the small lamp 10 is lit, and a charging current is supplied to the capacitor C1 via the light switch 1, diode D7, and resistor R1, as shown in FIG. 2b.

At the same time, as shown in FIG. 2d, the transistor T2 has a light switch 1 and a diode D.
A base current is supplied through the transistor T6 and the resistor R8, and the transistor T2 is turned on. Therefore, although the field effect transistor T1 is in a state where it can be turned on depending on the charge level of the capacitor C1 described above, it is prohibited from outputting its output due to the on action of the transistor T2.

(b) At time t2, the light switch 1 is operated in stages as shown in FIG. 2a to turn on the headlamp 4.

At this time, an exciting current is applied to the exciting coil 6a of the up drive relay 6 via the light switch 1, and the relay contact 6b is closed. By closing the relay contact 6b, an excitation current is supplied to each excitation coil 33a, 34a of the motor circuit 3 via the left and right limit switches 35, 36. At the same time, each excitation coil 51a, 52a of the lamp relay 5 is also supplied with an excitation current. Then, the contacts 33b and 34b of the left and right motor relays 33 and 34 of the motor circuit 3 are switched to the normally open side, and the contacts 6b and the left and right limit switches 3 are switched to the left and right motors 31 and 32, respectively.
5, 36 left and right first sliding contacts 35a, 36
a, electricity is applied through the right and left second sliding contacts 35b, 36b and each contact 33b, 34b, both the left and right motors 31, 32 start rotating, and the second
As shown in Figure f, left and right head lamps 41, 4
2 performs an exposure operation. In addition, the left side shown in Figure 1
The states of the right limit switches 35 and 36 indicate the state immediately before the start of the exposure operation.

Thereafter, at time t21, when the left and right headlamps 41 and 42 have completed exposure, the left and right first sliding contacts 35a and 36a are opened, and the left and right second sliding contacts 35b and 36b are always grounded. The left and right motors 31 and 32 are brought into contact with the left and right second rotation patterns 35f and 36f, and stop rotating. FIG. 3 shows the states of the left and right limit switches 35 and 36 when the exposure is completed. Also, the time
At t21, left and right lamp relays 51 and 52
The excitation current to the excitation coils 51a and 52a is also stopped, and the relay contacts 51b and 52b are closed.
Left and right head lamps 4 as shown in Fig. 2h
1 and 42 light up upon completion of exposure.

(c) At time t3, operate light switch 1 in stages as shown in FIG. 2a.

At this time, as shown in FIG. 2h, the left and right headlamps 41 and 42 are turned off, but the transistor T2 is supplied with power through the resistor R8 and maintains its ON function. That is, at time t3, the left and right headlamps 41 and 42 are not operated to conceal.

(d) At time t4, turn off the light switch 1 as shown in Figure 2a.

At this time, the small lamp 10 is turned off, and the power supply path of the transistor T2 via the resistor R8 is cut off, so that the transistor T2 is turned off and the inhibition circuit for the field effect transistor T1 is released. At the same time, capacitor C1 is discharged through resistors R2, R3, and R4, as shown in FIG. 2b. Due to this discharge action, the transistor T1 is
At time t41, the discharge level of capacitor C1 reaches the level of transistor T.
Transistor T1 remains on until the voltage drops below the threshold level of 1.

At this time, the coil 211a of the down drive relay 211 is turned on by the ON action of the transistor T1.
is excited and the relay contact 211b is closed to the normally open side.

The left and right motors 31 and 32 are connected to a relay contact 211b and a left and right limit switch 3.
Electricity is applied through the third sliding contact 35c, the fourth sliding contact 36c, and the relay contacts 33b, 34b of 5 and 36, and the left and right head lamps 41 and 42 start rotating until time t42 as shown in FIG. 2g.
operate in a hidden manner.

Figures 4 and 5 are drawings showing the operation of the left and right limit switches 35 and 36 in succession during the concealment operation, and Figure 3 shows the operation of the left and right motors 31 and 32 at time t4. Fig. 5 shows the state immediately before starting rotation, and Fig. 5 shows the state in which the concealment operation is completed immediately after the left and right motors 31, 32 stop rotating at time t42, and Fig. 4 shows the state immediately before the rotation starts at time t4. This shows the state at any time between time t42.

In the state shown in FIG. 5, if the left and right fourth sliding contacts 35d and 36d contact the constantly grounded left and right fourth rotation patterns 35h and 36h, both ends of the left and right motors 31 and 32 The child is grounded and the brakes are applied suddenly.

(e) At time t5, turn light switch 1 on to the passing ON position as shown in Figure 2a.

At this time, capacitor C1 is diode D5,
A charging current flows through the resistor R1 and charging starts as shown in FIG. 2b, and the capacitor C2
A charging current flows through the diode D4 and the resistor R5, and charging is started as shown in FIG. 2c.

On the other hand, the excitation coil 6 of the up drive relay 6
a is excited through diode D3 and closes relay contact 6b. If the left and right head lamps 41 and 42 are in the hidden state just before time t5, the left and right motors 31 and 32 are energized through the left and right limit switches 35 and 36 by closing the relay contact 6b. Then, the exposure operation starts as shown in FIG. 2f.

Then, at time t51, with the completion of exposure, the left and right head lamps 4 as shown in Fig. 2h.
1 and 42 are lit.

(f) At time t6, light switch 1 is turned off as shown in Figure 2a.

At this time, capacitor C1 is connected to resistors R2, R3,
A discharge current flows through R4 to start discharging, and a discharge current flows to the capacitor C2 through resistors R6 and R7 and the base-emitter of the transistor T2 to start discharging. In addition, capacitor C1,
The discharge time constant x 1 on the side of the resistors R2, R3, and R4 is set larger than the discharge time constant x 2 on the side of the capacitor C2 and the resistors R6 and R7.

Therefore, the transistor T2 remains on until time t61 when the discharge level of the capacitor C2 becomes below the threshold level of the transistor T2, as shown in FIG. As shown by h, the exposure state is maintained until the afterglow disappears after being turned off at time t6, ensuring that the beams of the left and right head lamps 41 and 42 are irradiated only in a predetermined direction, and the anti-glare function is activated. have

Then, at time t61, the circuit for inhibiting the operation of the field effect transistor T1 by the transistor T2 is released, and the circuit for inhibiting the operation of the field effect transistor T1 is released.
remains on from that point until time t62. As the transistor T1 turns on, the left and right motors 31 and 32 are energized, and the left and right head lamps 41 and 42 are operated in concealment as shown in FIG. 2g.

(g) After that, when the light switch 1 is operated to AOUT, lamp lighting control is performed as follows. In the automatic lighting control section 9, a lighting control circuit 91 turns on and off three transistors T3 to T5 according to the output level from the illuminance sensor 8.

For example, when the illuminance outside the vehicle decreases to an illuminance that requires lighting of the small lamp 10, the lighting control circuit 91 turns on the transistor T5, thereby exciting the excitation coil 94a of the small lighting relay 94. Therefore, relay contact 9
4b is closed, the small lamp 10 lights up, and the switching part 2 is activated in the same way as when the light switch 1 is operated step by step.

After that, the illuminance outside the vehicle increased to headlamps 41 and 42.
When the illuminance decreases to a level that requires lighting of the dimmer filaments 41b and 42b, the lighting control circuit 91 turns on the three transistors T3 to T5.
By turning on the excitation coils 92a and 93a of the daimer lighting relays 92 and 93 and the excitation coil 94a of the small lighting relay 94.
to excite. Therefore, relay contacts 92b, 9
3b and 94b are closed, in the same way as when light switch 1 is operated to the B position of the stage.
The switching unit 2, motor circuit 3, and headlamp relay 5 operate, and the headlamp 41b,
42b is turned on.

After that, when the illuminance outside the vehicle rises to an illuminance that requires only the small lamp 10 to be lit, the lighting control circuit 91 turns off the transistors T3 and T4, thereby making it similar to the case where the lighting switch 1 is switched from stage to stage. It will have a similar effect.

Note that the manual switch 23 shown in FIG. , 42, the contact 23c on the second side is connected to the movable segments 23d, 23e.
is closed, and when manually exposed, movable pieces 23d and 23e close the contacts 23a and 23b on the first side.

The manual switch 23 is a switch that can be omitted as appropriate.

Furthermore, the diode circuit 2 in the above embodiment
The connection structure of the diode D8 of No. 4 has the same effect even if the connection structure of the diode D8' shown by the dotted line in FIG. 1 is used.

Effects of the invention As detailed above, according to the invention, even when the vehicle is running in an area where the illuminance outside the vehicle changes frequently, the retractable head can be turned on and off by simply switching the light switch to the automatic on/off stage. Since the lamp appears and disappears and turns on and off according to the illuminance outside the vehicle, there is no hassle in turning on and off the lamp.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram showing a preferred embodiment of this invention. FIG. 2 is a time chart illustrating the operation of each component of the circuit shown in FIG. FIG. 3 is an explanatory diagram showing the operation of the limit switch when the exposure of the headlamp is completed.
4 and 5 are explanatory diagrams showing the operation of the limit switch when the headlamp is concealed, and FIG. 4 shows the state at any time between the states shown in FIGS. 3 to 5. drawing,
FIG. 5 is a drawing showing a state in which the concealing operation is completed immediately after the motor stops rotating. 1...Light switch, 2...Switching section, 3
...Motor circuit, 4.Retractable headlamp, 5.Headlamp relay, 6.Up drive relay, 7.DC power supply, 8.Illuminance sensor, 9.Automatic lighting control unit, 21.First switching circuit,
22...Second switching circuit, 23...Manual switch.

Claims (1)

[Scope of utility model registration request] A retractable headlamp mounted so that it can be retracted and retracted, a motor that drives the external retractable headlamp to retract and retract, a light switch that applies a drive signal to the motor and instructs the retractable headlamp to turn on and off, and a light switch that controls the retractable headlamp according to the illuminance outside the vehicle. An illuminance sensor that outputs a signal, and when the light switch switches to the automatic on/off stage, controls the retractable headlamp to turn on and off according to the output level of the illuminance sensor, and when the retractable headlamp is turned on. A retractable headlamp control device comprising: an automatic lighting control section that applies a lamp exposure drive signal to the motor.