JP2522933B2 - Retractable headlamp controller - Google Patents

Abstract

PURPOSE:To reduce consumption of a battery, by a method wherein energization to a motor to expose and shield a head lamp is limited to a specified time, and the discharge current of a capacitor is used as a working source when the head lamp is exposed and shielded. CONSTITUTION:In a device which controls a motor circuit 3 through a switching part 2 through control of a light switch 1 to expose and shield a retractable head lamp 4, a switching part 2 is provided with a first switching part 21 having a charge and discharge circuit, containing a capacitor C1, and connected to a motor circuit 3. Further, the switching part is provided with a second switching part 22, functioned as the output prohibiting circuit of the switching part 21 during turning ON of the light switch 1, a manual switch 23, and a diode circuit 24. Control is effected so that charging is performed during turning ON of the light switch 1, a motor circuit 3 is energized for a given time during turning OFF of the light switch 1, and the head lamp 4 is driven to the shield side.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable headlamp control device capable of exposing and concealing a retractable headlamp in response to an operation of a riding switch of an automobile, and particularly to a retractable head. The present invention relates to an improvement in a retractable headlamp control device including a switching circuit for energizing and controlling a lamp driving motor circuit.

[Conventional technology]

Conventionally, as a retractable headlamp control device of this type, for example, there is one disclosed in Japanese Utility Model Publication No. 57-54435.

This technology is a retractable headlamp that is installed in a car body so that it can be retracted and retracted, and is retracted or exposed by a drive motor, and a light switch that is manually operated at a lamp lighting position and a lamp unlit position to control lighting of the retractable headlamp, A first switch which is switched in conjunction with the operation of the light switch, and an exposure circuit for operating the drive motor so as to expose the retractable headlamp at the lamp lighting position by controlling energization by the first switch and lighting the lamp. A retracting circuit for actuating the drive motor to retract the retractable headlamp in a position, and a separate first circuit for manually energizing the exposing circuit in parallel with the first switch and de-energizing the retracting circuit. Lito, which consists of two switches Were those related to the drive motor circuit click Portable headlamp.

Further, according to the conventional technique, the motor is energized by a combination of a limit switch and an operation switch that rotate in association with the rotation of the motor, and the exposure and concealment operation provided in the rotation pattern of the limit switch. The energization of the motor was stopped when the sliding contact of the limit switch reached the conductive pattern of auto stop at the time of completion.

[Problems to be solved by the invention]

According to the above-mentioned conventional technique, the energization of the motor is not stopped before the sliding contact of the limit switch reaches the conductive pattern of the auto stop, and for example, the retractable headlamp is kept exposed in the winter. In the case of snowfall, even if the retractable headlamp is operated to conceal, the concealing operation cannot be completed due to snow clogging and the motor continues to be energized.

As one means for dealing with this problem, there is a means for arranging a monitor lamp in parallel with the motor to monitor the operating state of the motor. However, even when the occupant is careful, there is a case where the operator does not notice whether the monitor lamp is operating. However, if the monitor lamp is attached to the instrument panel, the structure becomes complicated.

Further, as another means, there is also a means for forcibly interrupting the energization time to the motor by using a time limit circuit, but when the time limit circuit is connected to a power source through an ignition switch, when the ignition switch is turned off, The retractable headlamp cannot be operated, and when the time circuit is directly connected to the power source, power consumption due to dark current is caused.

[Means for solving problems]

The present invention has been made to address the above-mentioned problems, and first, the basic configuration is as follows. That is, in a retractable headlamp control device having a switching circuit that is operated by operating a light switch of an automobile and a motor circuit that exposes or conceals the retractable headlamp by operating the switching circuit, the switching circuit is , A retractable headlamp control device including a first switching circuit that includes a charge / discharge circuit and is connected to a motor circuit, and a second switching circuit that forms an output inhibition circuit of the first switching circuit when the light switch is on Is provided.

Further, as a configuration of the embodiment of the present invention, the discharge time constant of the charge / discharge circuit included in the first switching circuit is set to be larger than the discharge time constant of the charge / discharge circuit included in the second switching circuit. A control device is provided.

[Action]

 The present invention having the above-described structure operates as follows.

First, by turning on the light switch, power is supplied to the switching circuit and the charge / discharge circuit of the first switching circuit is charged. At this time, the second
The second switching circuit also forms an output inhibit circuit for the first switching circuit. Therefore, the signal for concealing the retractable headlamp when the light switch is turned on is not derived from the switching unit to the motor circuit.

Next, when the light switch is turned off, the second switching circuit stops operating, the output prohibiting circuit of the first switching circuit is released, and the first switching circuit outputs the output for a predetermined time by the discharge current of the charge / discharge circuit. appear.

Therefore, when the light switch is turned off, a signal for concealing the retractable headlamp is led from the switching unit to the motor circuit for a predetermined time.

〔Example〕

The accompanying drawings are drawings showing a preferred embodiment of the present invention.

In FIG. 1, 1 is a light switch, 2 is a switching unit, 3 is a motor circuit, 4 is a retractable headlamp (hereinafter simply referred to as "headlamp"), 5 is a headlamp relay, and 6 is an up drive relay. , And 7 are DC power supplies.

The light switch 1 is switched to the OFF stage, the I stage (the dusk lighting stage), and the II stage (the headlamp lighting stage), and the A position (main) and the B position (dimmer) at each stage. , C position (passing) to each position is a combination type switch.

The switching unit 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 a down drive relay 211,
And a relay contact 211b. The values of the resistors R3 and R4 are set to be larger than those of the resistors R1 and R2. The second switching circuit 22 is composed of a capacitor C2, resistors R5 to R8, and a transistor T2, and the manual switch 23 has fixed contacts 23a, 23b on the first side and fixed contacts 23C on the second side. And movable sections 23d, 23e
And the diode circuit 24 is composed of diodes D1 to D7.

The motor circuit 3 is composed of left / right capacitors 31, 32 left / right motor relays 33, 34 and left / right limit switches 35, 36. The left and right motor relays 33,34
Are provided with exciting coils 33a, 34a and contacts 33b, 34b, respectively. The left limit switch 35 is decelerated by a gear (not shown) in accordance with the rotation of the fixed left first sliding contact 35a to left fourth sliding contact 35d and the left motor 31, and the left head First left rotation pattern in which conductive patterns corresponding to the concealed position and exposed position of the lamp 41 are formed
35e to the left fourth rotation pattern 35h. Similarly, the right limit switch 36 includes the fixed right first sliding contact 36a to the right fourth rotation pattern 36h.

Here, the left / right second rotation patterns 35f, 36f and the left / right fourth rotation patterns 35h, 36h are conductive patterns that are always grounded.

The headlamp 4 is composed of left and right headlamps 41 and 42, and the left and right headlamps 41 and 42 respectively include left and right main filaments 41a and 42a and left and right dimmer filaments 41b and 42b.

The headlamp relay 5 is a left / right lamp relay 51,52.
The left and right lamp relays 51 and 52 are composed of left and right exciting coils 51a and 52a and left and right relay contacts 51b and 52b, respectively.
It has.

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

Next, the operation of the preferred embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS.

(A) At time t1, the light switch 1 is operated to the I stage as shown in FIG. 2 (a).

At this time, as shown in FIG. 2B, the charging current is supplied to the capacitor C1 through the light switch 1, the diode D7, and the resistor R1.

At the same time, as shown in FIG. 2 (d), the transistor T2
Is supplied with a base current via the light switch 1, the diode D6, and the resistor R8, and the transistor T2 is turned on. Therefore, although the field effect transistor T1 is in a state in which it can be turned on depending on the charge level of the capacitor C1, the output of the field effect transistor T1 is prohibited by the on action of the transistor T2.

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

At this time, an exciting current is applied to the exciting coil 6a of the up-driving relay 6 through the light switch 1 and the relay contact
6b is closed. By closing the relay contact 6b, an exciting current is supplied to the exciting coils 33a, 34a of the motor circuit 3 via the left and right limit switches 35, 36. At the same time, the exciting current is also applied to the exciting coils 51a and 52a of the lamp relay 5. Then, the contacts 33b, 34b of the left and right motor relays 33, 34 of the motor circuit 3 are switched to the normally open side,
The left / right motors 31, 32 have the contact 6b, the left / right first sliding contacts 35a, 36a of the left / right limit switches 35, 36, the left / right second sliding contacts 35b, 36b, and the respective contacts 33b, Electricity is supplied via 34b, the left and right motors 31 and 32 both start to rotate, and the left and right headlamps 41 and 42 perform the exposure operation as shown in FIG. 2 (f). The left and right limit switches shown in Fig. 1
The states of 35 and 36 show the states immediately before the start of the exposure operation.

Then, at time t21, the left and right headlamps 41,
When 42 is exposed, the left / right first sliding contacts 35a, 36a are opened, and the left / right second sliding contacts 35b, 36b are grounded.
The left and right motors 31, 32 are stopped by being contacted with the second right rotation patterns 35f, 36f. FIG. 3 shows the states of the left and right limit switches 35 and 36 when the exposure is completed. Also, the time t
Excitation coil 51 for left and right lamp relays 51 and 52 at 21:00
The excitation currents to a and 52a also stop, the relay contacts 51b and 52b are closed, and the left and right headlamps 4 as shown in Fig. 2 (h).
1,42 lights up when the exposure is completed.

(C) At time t3, the light switch 1 is operated to the I stage as shown in FIG. 2 (a).

At this time, as shown in FIG. 2 (h), the left and right headlamps 41, 42 are extinguished, but the transistor T2 is supplied with power via the resistor R8 and holds the on action. That is, time t3
At times, the left and right headlamps 41 and 42 are not concealed.

(D) At time t4, the light switch 1 is turned off as shown in FIG. 2 (a).

At this time, the transistor T2 is cut off from the power feeding path via the resistor R8, and is turned off to release the inhibition circuit for the field effect transistor T1. At the same time, as shown in FIG. 2 (b), the capacitor C1 is discharged via the resistors R2, R3, R4. Due to this discharge action, the transistor T1 is turned on as shown in FIG. 2 (e), and the capacitor C1 is activated at time t41.
The transistor T1 remains in the ON state until the discharge level of the transistor T1 becomes less than the threshold level of the transistor T1.

At this time, the coil T11a of the down drive relay 211 is excited by the ON action of the transistor T1 and the relay contact 211b.
Is closed on the normally open side.

Then, the left and right motors 31, 32 have relay contacts 211b,
Left / right limit switch 35, 36 first sliding contact 35c, 4th
The sliding contact 36c and the relay contacts 33b, 34b are energized to start rotation and conceal the left and right headlamps 41, 42 until time t42 as shown in FIG. 2 (g).

4 to 5 are drawings showing the operation of the left and right limit switches 35 and 36 continuously during the concealment operation. FIG. 3 shows the left and right motors 31 and 36 at time t4. 32
Shows the state immediately before the start of rotation, and FIG. 5 shows time t42.
At the time, the concealing operation is completed immediately after the left and right motors 31, 32 stop rotating, and FIG. 4 shows the state at any time between the time t4 and the time t42.

Then, in the state shown in FIG. 5, the left / right fourth sliding contact 35
Left and right fourth turning patterns 35h and 36h in which d and 36d are always grounded
If touched, both terminals of the left and right motors 31 and 32 are grounded and braked suddenly.

(E) At time t5, the light switch 1 is turned on as shown in FIG. 2 (a).

At this time, the charging current starts to flow in the capacitor C1 through the diode D5 and the resistor R1, as shown in FIG. 2 (b), and the charging current flows in the capacitor C2 through the diode D4 and the resistor R5. Charging is started as shown in FIG. 2 (C).

On the other hand, the exciting coil 6a of the up drive relay 6 is excited through the diode D3 to close the relay contact 6b. Then, right before the time t5, left and right headlamps 41, 42
, 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, and the exposure operation starts as shown in FIG. 2 (f). To do.

Then, at the time t51, the left and right headlamps 41, 42 are turned on as shown in FIG. 2 (h) with the completion of the exposure.

(F) At time t6, the light switch 1 is turned off as shown in FIG. 2 (a).

At this time, a discharge current flows through the capacitors C1 via the resistors R2, R3, R4 to start discharging, and a discharge current flows through the capacitors C2 via the resistors R6, R7 and the base-emitter of the transistor T2 to start discharging. Capacitor C1, resistors R2, R3, R44
The discharge time constant τ1 on the side is set to be larger than the discharge time constant τ2 on the side of the capacitor C2 and the resistors R6 and R7.

Therefore, as shown in FIG. 2 (d), the transistor T2 is the transistor T2 until the discharge level of the capacitor C2 becomes equal to or lower than the threshold level of the transistor T2 until the time t61.
2 holds the ON action, and the left and right headlamps 41 and 42 are the second
As shown in Fig. (H), the exposure state is maintained until the afterglow after the light is turned off at time t6, and it is ensured that the beams of the left and right headlamps 41 and 42 irradiate only in a predetermined direction. Has anti-glare function.

Then, at time t61, the operation prohibiting circuit of the field effect transistor T1 by the transistor T2 is released, and the field effect transistor T1 maintains the ON action until time t62.

As the transistor T1 is turned on, the left / right motors 31, 32 are energized, and the left / right headlamps 41, 42 are concealed as shown in FIG. 2 (g).

The manual switch 23 shown in FIG.
It is a switch operated when exposing and concealing the right headlamps 41, 42. When the left and right headlamps 41, 42 are automatically controlled by operating the light switch 1, the contact 23c on the second side is movable. When the sections 23d and 23e are closed and exposed manually, the first-side contacts 23a and 23b are moved to the movable sections 23d and 23e.
Is a switch that closes.

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

〔The invention's effect〕

Since the present invention has the above-mentioned configuration and operation, it has the following various effects.

B) When the retractable headlamp of the vehicle cannot be concealed due to snowfall or the like, even if the motor for operating the retractable headlamp is locked,
Since power supply to the motor is stopped within a predetermined time, it is possible to prevent the motor from burning.

(B) The above-mentioned switching unit for limiting the energization time to the motor is connected to the light switch, and can be operated according to the operation of the light switch regardless of whether the ignition switch is off.

C) When the light switch is turned off, the operating power supply for the switching part that conceals the retractable headlamp is due to the discharge current of the capacitor, and the switching part keeps operating even after the power supply to the switching part is stopped by turning off the light switch. The timed operation can be performed, and no dark current flows at the end of the timed operation.

Therefore, the battery of the vehicle is not consumed.

D) It is possible to provide a highly reliable, small-sized, inexpensive device which has a small number of parts constituting a circuit in the device of the present invention.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a preferred embodiment of the present invention. FIG. 2 is a time chart explaining 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 to 5 are explanatory views showing the operation of the limit switch during the concealing operation of the headlamp.
FIG. 5 is a drawing showing a state at any time between the states shown in FIGS. 3 to 5, and FIG. 5 is a drawing showing a concealing operation completed state immediately after the motor stops rotating. 1 ... Light switch, 2 ... Switching part, 3 ...
Motor circuit, 4 ... Retractable headlamp, 5
...... Headlamp relay, 6 …… Up drive relay,
7 ... DC power supply, 21 ... First switching circuit, 22 ...
… Second switching circuit, 23 …… Manual switch.

Claims (2)

(57) [Claims] 1. A control device for a retractable headlamp, comprising: a switching part that is operated by operating a light switch of an automobile; and a motor circuit that drives the retractable headlamp to be exposed or concealed by the operation of the switching part. The switching unit includes a first switching circuit that includes a charging / discharging circuit and is connected to the motor circuit, and a second switching circuit that forms an output inhibiting circuit of the first switching circuit when the light switch is on, and A retractable headlamp control device characterized in that charging is performed when the light switch is turned on, and when the light switch is turned off, the motor circuit is energized for a predetermined time to drive the headlamp to the concealing side. 2. A discharge time constant of a charge / discharge circuit included in the first switching circuit is set to be larger than a discharge time constant of a charge / discharge circuit included in the second switching circuit. The retractable headlamp control device according to claim 1.