JPH0123862Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a headlight device mounted on an automobile or the like, and particularly relates to a headlight device configured so that the headlamp is concealed and exposed.

[Conventional technology]

2. Description of the Related Art Generally, a device is known as a headlight device for an automobile, in which the headlamp is hidden in the vehicle body when the headlight is turned off, and is exposed from the vehicle body by a drive motor when the headlight is turned on.

By the way, when overtaking a vehicle while driving, so-called passing lighting is used, such as flashing the headlights at appropriate time intervals to send a signal to the vehicle traveling ahead. may be provided.

Conventionally, even in the above-mentioned exposed/concealed headlight device, a device has been proposed in which a passing switch is provided and the headlamp can be exposed simply by operating the passing switch. For example, JP-A-59-
(Refer to Publication No. 124445).

[The problem that the idea aims to solve]

In such a headlight device, when the passing switch is operated, the headlamp is driven to expose the headlamp, and after the headlamp is exposed, the headlamp is maintained in the exposed state. When the switch is turned off, the headlamp continues to be exposed for the duration of the exposure state maintenance time for the passing lighting after the lighting switch is turned off, which may cause a problem that the driver feels uncomfortable.

Therefore, in such a headlight device, a lighting relay, a daylight relay, and a reverse current prevention diode are provided to electrically isolate the passing switch from the lighting switch, even when switching to the high beam side. Also, lighting switch
After being turned off, the headlamp is configured so that it is hidden as usual.

However, in this case, since the lighting relay and the daylight relay are provided outside the headlamp retractor control circuit, it is necessary to change the external circuit, which poses a problem in terms of the production system, etc.

The purpose of this invention is to allow the headlights to operate in the same way as normal, even if the lighting switch is turned off while the high beam is switched to the high beam side, without requiring any changes to the external circuit. An object of the present invention is to provide a headlight device.

[Means to solve the problem]

The headlight device according to the present invention includes a headlamp installed in a vehicle body in a concealed and exposed manner;
a drive motor for exposing and concealing the headlamp, a driving electric circuit for the motor, and a lighting switch for turning on the headlamp;
In a headlight device comprising a daylight switch that switches the headlamp between low beam and high beam, and a passing switch that commands passing lighting to the headlamp, the driving motor causes the driving motor to turn on the headlamp when the passing switch is operated. A headlamp exposure state maintenance circuit that drives the headlamp to expose and maintains the headlamp exposure state for a certain period of time after the passing operation is completed, and a headlamp exposure state maintaining circuit that maintains the headlamp exposure state when the lighting switch is turned on and shortens the concealment of the headlamp after the lighting switch is turned off. The present invention is characterized by comprising a headlamp exposure state holding circuit that delays the time, and a maintenance release circuit that releases the maintenance operation of the headlamp exposure state maintenance circuit while the headlamp exposure state holding circuit is in operation.

[Effect]

According to the above-mentioned means, while the headlamp exposure state holding circuit is operating when the lighting switch is in the ON state, the maintenance canceling circuit releases the maintenance operation of the headlamp exposure state maintaining circuit that maintains the exposure time of the headlamp for a certain period of time after the completion of the passing operation. By providing a can be concealed in the same way as a normal concealment operation. Therefore, it is possible to prevent the driver from feeling uncomfortable.

In addition, we have installed a headlamp exposure state holding circuit that maintains the headlamp exposure state when the lighting switch is turned on and delays the concealment of the headlamp after the lighting switch is turned off.
It is possible to avoid sudden cover-up of the headlamp due to erroneous operation of the lighting switch, and if the lighting switch is returned immediately, the headlamp remains exposed, so safety can be significantly improved.

Further, by providing a maintenance release circuit for releasing the maintenance operation of the headlamp exposure state maintenance circuit while the headlamp exposure state maintenance circuit is in operation, it is possible to reliably perform an action to avoid sudden concealment operation due to erroneous operation.

〔Example〕

FIG. 1 is a circuit diagram showing a headlight device which is an embodiment of the present invention.

In this embodiment, the left and right headlamps 1 and 1' of the automobile are installed in the left and right housing parts of the vehicle body so that they can be exposed and concealed, and both headlamps are changed from a concealed state to an exposed state by driving motors 2 and 2'.
They are configured to be respectively shifted from an exposed state to a concealed state. Also, this headlamp 1,
1' is configured such that it can be used by switching between high beams 1a, 1'a and low beams 1b, 1'b by switching the daylight switch 9.

The motors 2, 2' are connected to a power source B via normally open contacts of switches 3a, 3'a in retractor relays 3, 3'. Relay switch 3a,
3'a is configured to be switched to relay coils 3b, 3'b, and by forming a short circuit for the motors 2, 2' when normally closed,
This is now being brought to a sudden halt.

Auto switches 4, 4' are connected in series to the relay coils 3b, 3'b, and the auto switches 4, 4' automatically switch between the up side and the down side in response to the exposure/concealment operation of the headlamp. It is configured to switch. That is, to explain one auto switch 4, while the headlamp 1 is transitioning from the concealed state to the exposed state,
The movable iron piece 5 is in contact with a fixed contact 6 on the up side, and when the headlamp 1 reaches the exposed state, the movable iron piece 5 is switched to contact the fixed contact 7 on the down side.

A retractor switch 8 is connected to the fixed contacts 6, 6' on the up side of the auto switches 4, 4', and this switch 8 rotates the motors 2, 2' when the headlamp is turned on to use the headlamp at all times. By this, the headlamp is brought into the exposed state, and even when the motors 2 and 2' are turned off, the headlamp is brought into the concealed state by rotating the motors 2 and 2'.

That is, when the retractor switch 8 is turned on, voltage is applied to the up-side fixed contact 6 of the auto switch 4, so the retractor relay coil 3b is energized and the normally open contact of the relay switch 3a is turned on. Become. As a result, the motor 2 rotates and the headlamp 1 is shifted from the hidden state to the exposed state.

When the headlamp 1 reaches a predetermined exposure state, the movable iron piece 5 of the auto switch 4 switches and contacts the fixed contact 7 on the down side, so the relay coil 3b is demagnetized and the relay switch 3a forms a short circuit. Become. This short circuit causes the motor 2 to suddenly stop.

After that, when the retractor switch 8 is turned off, voltage is applied to the fixed contact 7 on the down side of the auto switch 4, so the relay coil 3b is energized again, and as a result, the motor 2 rotates and the headlamp 1 is exposed. It will be transferred from the state to the concealed state.

When the headlamp 1 is in a predetermined concealed state, the auto switch 4 is switched and the movable iron piece 5 contacts the fixed contact 6 on the up side, so the relay coil 3b is demagnetized and the relay switch 3a forms a short circuit. , the motor 2 will be suddenly stopped.

On the other hand, a lighting switch 10 consisting of three switches 11, 12, and 13 is connected to the head lamps 1 and 1', and the lighting switch 10 is operated by a lever attached to a handle (not shown). It is configured so that it can be switched by. The first switch 11 is interposed in series between the power source B and the small lamp 14, and the second switch 12 is interposed in series between the power source B and the daylight switch 9. The third switch 13 is connected to a headlamp retractor control circuit (hereinafter referred to as a controller) 16.

The lighting switch 10 is provided with a passing switch 15 (not shown) together with the daylight switch 9, and the passing switch 15 is connected to the high beams 1a, 1'a of the headlamps 1, 1' and a controller 16.

The controller 16 includes a relay switch 17, a relay coil 18 for switching this switch 17, a control transistor 19 for controlling excitation/demagnetization of this relay coil 18, a headlamp exposure state holding circuit 20, and an abnormality alarm circuit 21. ,
A headlamp exposure state maintenance circuit 22 and a maintenance cancellation circuit 23 are provided.

The relay switch 17 connects its movable iron piece to the normally closed contact of the retractor switch 8, and its normally closed contact D to the down side contacts 7, 7' of the auto switches 4, 4'.
Its normally open contact U is connected to up side contacts 6 and 6' of auto switches 4 and 4', respectively. The relay coil 18 is provided in parallel with the relay switch 17, and is activated and demagnetized by turning on and off a control transistor 19 provided in series with the coil 18 itself, thereby turning on and off the relay switch 1.
7 to cause the switching operation.

Although detailed explanation is omitted, the headlamp exposure state holding circuit 20 includes a third transistor 27 and a fourth transistor 27.
It includes a transistor 28, a capacitor 29, a capacitor 30, a plurality of resistors, and a diode, and the collector of the third transistor 27 is connected to the fourth transistor.
The base and emitter of the transistor 28 are connected to the lighting switch 10, the collector of the fourth transistor 28 is connected to the base of the control transistor 19, and the emitter is connected to ground via a Zener diode. The headlamp exposure state holding circuit 20 maintains the exposure state of the headlamp when the lighting switch 10 is switched from the headlamp lighting position to the small lamp lighting position.
When the small lamp is switched from the small lamp lighting position to the lamp extinguishing position, the fourth transistor 28 is turned on by the discharge current of the capacitor 30, thereby delaying the concealment of the headlamp. This delayed operation by the holding circuit 20 avoids the risk of sudden cover operation of the headlamp due to erroneous operation of the lighting switch 10 while the vehicle is running, thereby improving safety. Therefore, the delay time only needs to be short enough to avoid risks caused by erroneous operations.

The abnormality warning circuit 21 is configured to keep the warning lamp 21a lit while the motors 2, 2' are energized, and the lighting makes the driver aware of the abnormality.

The headlamp exposure state maintaining circuit 22 includes a first transistor 24, a capacitor 25, a plurality of resistors, and a plurality of diodes, and the collector of the first transistor 24 is connected to the control transistor 19.
The emitter is connected to the ground via a Zener diode, and the base is connected to the positive electrode side of the capacitor 25. The positive side of the capacitor 25 is connected to the passing switch 15 via a resistor and a diode.

The headlamp exposure state maintenance release circuit 23 is connected to the second
The transistor 26 has a collector connected between the base of the first transistor 24 and the capacitor 25, an emitter connected to the ground, and a base connected to the headlamp exposure state holding circuit 20.
are respectively connected to the first switch 11 of the lighting switch 10 via the third transistor 27 in the .

Next, the action will be explained.

(a) Condition when lights are turned off.

For example, when the lighting switch 10 is turned off, such as during daytime driving, the headlamps 1, 1' are turned off and hidden within the vehicle body frame. At this time, retractor switch 8 is OFF, and
The movable contact 5 of the auto switch 4 is in contact with the contact 6 on the up side (the same applies to the auto switch 4').

(b) Operation during passing lighting.

When the passing switch 15 is turned on by the driver of the car to overtake, etc., the passing switch 15 is turned on, and the power is supplied from the power source B through the passing switch 15.
High beam 1a in headlamp 1, 1',
1'a will be lit.

At the same time, the following operations automatically perform headlamp exposure, exposure state maintenance, and passing illumination.

When the passing switch 15 is turned on, the capacitor 25 of the exposed state maintaining circuit 22 is charged via the path from the passing switch 15.

When the capacitor 25 is charged, the first transistor 24 is turned on, and therefore the control transistor 19 is turned on.

When the control transistor 19 is turned on, the relay coil 18 is excited through the normally closed contact of the retractor switch 8 and the control transistor 19, so that the normally open contact U of the relay switch 17 is turned on.

As a result, power supply B → retractor switch 8
→Relay switch 17 →Auto switch 4,
4' up side contact 6, 6' → its movable iron piece 5,
5'→retractor relay coils 3b, 3'b→earth, so that the retractor relay switches 3a, 3'a are turned on.

Retractor relay switch 3a, 3'a
When turned on, power supply B → this switch 3a, 3'
The motors 2, 2' are rotated by the energizing path a. By this driving, the headlamps 1, 1' are shifted from the concealed state to the exposed state.

When the head lamps 1, 1' are brought into a predetermined exposed state, the movable iron pieces 5, 5' of the auto switches 4, 4' are automatically switched to the down side contacts 7, 7'.

Since the connection path of the down side contacts 7, 7' is cut off at the contact D of the relay switch 17, the retractor relay coils 3b, 3'b
By demagnetizing the relay switches 3a,
3'a is switched to the normally closed contact side.
As a result, a short circuit is formed, so that the motors 2, 2' suddenly stop, and the head lamps 1, 1' are exposed.

On the other hand, after the passing switch 15 is turned off, the first transistor 24 remains on due to the discharge current of the capacitor 25, so the control transistor 19 keeps the relay coil 18 energized so that the relay switch 17 is always turned on. Continue to hold the open contact on the U side.

As a result, even if the movable iron pieces 5, 5' of the auto switches 4, 4' are in contact with the down side contacts 7, 7', the motors 2, 2' are not rotated, so the head lamps 1, 1' are not exposed. will be maintained.

When the discharge of the capacitor 25 progresses for a certain period of time and the potential becomes less than the reference setting value, the first
Since the transistor 24 is turned off, the control transistor 19 is turned off.

When the control transistor 19 is turned off, the relay coil 18 is demagnetized, so the relay switch 17 is switched so that the normally closed contact D side is turned on.

When relay switch 17 is switched, power supply B
→ Retractor switch 8 → Relay switch 17
→ Down side contact 7 of auto switch 4, 4',
7'→The movable iron pieces 5, 5'→Retractor relay coils 3b, 3'b→Ground
Since the relay coils 3b and 3'b are excited,
Relay switches 3a and 3'a are turned on.

As a result, the motors 2, 2' are energized and rotated, so that the headlamps 1, 1' are shifted from the exposed state to the hidden state.
As a result, the headlight device has been restored to its original state.

(c) Operation during normal lighting.

For example, when the lighting switch 10 is turned on when driving at night, the first
Since the power is supplied through the switch 11 and the second switch 12, the small lamp 14 and the low beams 1b and 1'b of the headlamps 1 and 1' are turned on.

At the same time, the following operations automatically shift the exposure of the headlamp and maintain the exposure state.

When lighting switch 10 is turned on,
Since the relay coil 18 is excited by the path from the third switch 13, the relay switch 17
is switched so that the normally open contact U is turned ON.

When the relay switch 17 is switched to the normally open contact U side, the head lamps 1, 1' are shifted to the exposed state by the same operation as in (b) above.

In this case, since the relay coil 18 continues to be excited while the lighting switch 10 is turned on, the exposed state is maintained.

(d) Normal concealment operation.

While the daylight switch 9 is turned on to the low beam side, the lighting switch 10 is turned on.
When turned off, the low beams 1b, 1'b of the headlamps 1, 1' and the small lamp 14 are turned off.

At the same time, the headlamps 1, 1' are automatically shifted from the exposed state to the hidden state by the following operation.

When the lighting switch 10 is turned off,
Relay coil 18 via third switch 13
The energizing path to is cut off.

However, since the control transistor 19 is turned on by the operation of the headlamp exposure holding circuit 20, the relay coil 18 continues to be energized. As a result, the headlamps 1, 1' remain exposed for a period of time prescribed by the holding circuit 20.

When the predetermined holding time elapses, the control transistor 19 turns OFF, so the relay coil 18
is demagnetized and the relay switch 17 is switched so that the down side contact D is turned on.

Thereafter, the headlamps 1, 1' are brought into the concealed state by the same operation as in (b) above.

(e) Release of exposure state maintenance during concealment.

While the daylight switch 9 is turned on to the high beam side, the lighting switch 10 is turned on.
When turned from ON to OFF, the operation of maintaining the headlamp exposure state during passing illumination in (b) above is canceled by the following operation.

When the lighting switch 10 is turned on and the daylight switch 9 is turned on to the high beam side, the headlamp exposure state maintenance circuit 22 is energized through the path from the daylight switch 9 (the same path as the passing switch 15). The capacitor 25 becomes ready for charging.

However, while the lighting switch 10 is turned on, the transistor 27 of the headlamp exposure holding circuit 20 is turned on through the path from the first switch 11, so the maintenance release circuit 2
The transistor 26 at No. 3 is turned on, and the potential at its collector becomes approximately 0 volts.

As a result, even if the exposed state maintaining circuit 22 is energized via the day switch 9, the capacitor 2
5 is not charged, the maintenance operation in the headlamp exposure state maintenance circuit 22 is canceled.

Therefore, even if the lighting switch 10 is turned from ON to OFF while the daylight switch 9 is turned on to the high beam side, the headlamp exposure state maintenance operation during passing lighting described in (b) above is not performed. , the headlamps 1, 1' are concealed, similar to the normal concealment operation in (d) above.

According to this embodiment, even if the lighting switch is turned off from ON while the daylight switch is turned on to the high beam side, the normal concealment can be performed without wasting the time required to maintain the headlamp exposure state in passing lighting. As with the operation, the headlights can be hidden, so the driver does not feel uncomfortable.

Since the controller is provided with a circuit for canceling the headlamp exposure state maintenance operation, there is no need to change the external circuit of the controller.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes are possible.

For example, the headlamp exposure state maintenance circuit and maintenance release circuit are not limited to the above configuration.

[Effect of idea]

As explained above, according to the present invention, if the lighting switch is turned OFF while the high beam is switched to the high beam side, or if the lighting switch is turned OFF immediately after performing a passing operation while the lighting switch is ON, However, since the headlights can be concealed in the same way as a normal concealment operation, it is possible to prevent the driver from feeling uncomfortable. In addition, since the headlamp concealment operation is slightly delayed by the headlamp exposure state holding circuit after the lighting switch is turned off, it is possible to avoid sudden headlamp concealment operation due to incorrect operation of the lighting switch, and the lighting switch must be returned immediately. For example, the headlamp remains exposed, significantly improving safety.
Moreover, since the maintenance operation of the headlamp exposure state maintenance circuit can be canceled while the headlamp exposure state maintenance circuit is in operation, safety can be reliably ensured.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a headlight device which is an embodiment of the present invention. 1, 1'... Head lamp, 2, 2'... Motor, 3, 3'... Retractor relay, 4, 4'...
Auto switch, 8...Retractor switch, 9
... Daylight switch, 10 ... Lighting switch, 14 ... Small lamp, 15 ... Passing switch, 16 ... Headlamp retractor control circuit, 17 ... Relay switch, 18 ... Relay coil, 19 ... Control transistor , 20... Head lamp exposure state holding circuit, 21... Abnormality alarm circuit, 22... Head lamp exposure state maintaining circuit, 23... Maintenance canceling circuit, 2
4...first transistor, 25...capacitor,
26... second transistor, 27... third transistor.

Claims (1)

[Scope of utility model registration request] A headlamp installed in a vehicle body so as to be concealed and exposed, a drive motor for exposing and concealing this headlamp, a driving electric circuit for this motor, a lighting switch for turning on said headlamp, and a low beam and a high beam for said headlamp. In a headlight device equipped with a daylight switch that switches a daylight switch, and a passing switch that commands passing lighting to the headlamp, the drive motor drives the headlamp to expose when the passing switch is operated, and performs the passing operation. A headlamp exposure state maintenance circuit maintains the exposure state of the headlamp for a certain period of time after the lighting is finished, and the lighting switch
A headlamp exposure state maintenance circuit that maintains the headlamp exposure state when the lighting switch is turned on and delays the concealment of the headlamp for a short time after the lighting switch is turned off, and maintains the headlamp exposure state maintenance circuit while this headlamp exposure state maintenance circuit is operating. A headlight device comprising a maintenance release circuit for releasing the.