JPS6331843A - Retractable head lamp device - Google Patents

Abstract

PURPOSE:To make the containing operation of a head lamp avoidable when a key switch is turned off under exposed condition of the head lamp and subsequently turned on again, by providing a timer circuit for producing an output signal for a predetermined time when a lighting switch is switched from on to off. CONSTITUTION:Motors MT1, MT2 for exposing/containing right and left head lamps L1, L2 are provided and sliding pattern switches SSW1, SSW2 interlocked with said motors are also provided. Up relays UR1, UR2 and down relays DR1, DR1 are connected to the top dead center and the bottom dead center of the sliding pattern switches SSW1, SSW2. A relay contact (try) of a timer relay TRY is placed in the down side line DL of a lighting switch LS where NC contact of said contact (try) is connected to the down relay DR1, DR2 side while NO contact thereof is connected to a retractable timer circuit RT. Furthermore, an up holding timer circuit UT for producing an output signal for a random time when the lighting switch LS is switched from on to off is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automobile tractor-pull headlamp device.

(Prior art) As a conventional adhesive tractor pull headlamp device, the second
Something like the one shown in the figure is known. This conventional device has a headlamp L1. Equipped with a lighting switch LS that can switch L2 to off, 1st stage, and 2nd stage, and turn on and off the main lamp, dimmer, and small lamp individually, and the headlamp down switch can be linked with the key switch KS. be.

In such a conventional device, when the lighting switch LS is turned on after the key switch KS is turned off, the headlamps L1 and L2 are exposed.

Even if the lighting switch Ls is subsequently turned off, the exposed (up) state can be maintained because the power supply E on the storage (down) side is cut off by the key switch KS. Therefore, even when the lighting switch S is turned off, there is no need for a separate operation switch to control the exposure of the headlamps L1 and 'L2.
It was advantageous in terms of simplifying the routing of harnesses and had the characteristics of high reliability. (Jitsukai 59-1
(No. 24751) However, on the other hand, when the key switch KS is turned on again, power is supplied to the storage side, so the storage drive is automatically attempted regardless of the driver's intention.
In winter, when the headlamp is in the exposed position, there is a risk that the rotor may lock if snow or the like gets stuck between the headlamp and the surrounding body panels and freezes. It also gave the driver a strange feeling.

In FIG. 2, a tractor pull timer circuit RT, which includes transistors T1 to T3, capacitors C1 to C3, and resistors R1 to R7, operates in conjunction with a passing relay circuit PRY, so that the headlamp 11. Drive motors MT 1 and MT until the storage operation of L2 is completed.
This is for supplying power to 2.

(Problems to be Solved by the Invention) As described above, in the conventional tractor-pull headlamp device, the headlamp does not retract even if the lighting switch is turned off after the key switch is turned off, and the key switch is turned off again. Since the headlights are automatically retracted when turned on, there is a risk that the motor may lock up, and there is also the problem of giving the driver a sense of harmony.

This invention was made to solve these conventional problems.Even if the key switch is turned off with the headlamp exposed, and then the key switch is turned on again, the headlamp does not turn off. prevents the motor from automatically retracting, eliminating the fear of motor locking,
Another object of the present invention is to provide a retractable headlamp device that does not cause the driver to feel uncomfortable due to its operation contrary to his will.

(Means for Solving the Problems) A retractable headlamp device of the present invention includes a retractable headlamp, a lighting switch, a key switch, and a timer circuit, and the timer circuit switches the lighting switch from on to off. An output signal is output for an arbitrary period of time, and the output signal is connected to the side where the drive motor is stored, and the off contact of the key switch is connected to the side that cuts off the output of the timer circuit.

(Function) In the tractor-pull headlamp device of the present invention, the timer circuit operates only when the lighting switch is turned on and then turned off, and can cause the drive motor to perform the retracting operation. Therefore, when the lighting switch is on and the key switch is turned off, the retractable headlamp remains exposed. Furthermore, even if the key switch is turned on again, the timer circuit does not operate, so the headlamp does not retract even if the lighting switch is turned off, allowing the headlamp to remain exposed.

(Example) Hereinafter, one embodiment of the present invention will be explained in detail based on the drawings.

FIG. 1 shows an embodiment of the present invention, and the lighting switch LS has the same configuration as that shown in the conventional example. Rotary switch SW1 shown in the conventional example. In this embodiment, instead of SW2, a sliding pattern switch 5SWI,
5SW2 is used. This sliding pattern switch 5SW1.5SW2 has an insulating window Is provided on a part of a rotary plate with good conductivity such as copper, and is connected to the drive motor MT1.
゜It moves and rotates according to the rotation of MT2. Up relays UR1 and UR2 and down relays DR1 and DR2 are connected to the top dead center and bottom dead center of the sliding pattern switches 5SW1 and 5SW2, respectively. Also, activity pattern switch 5SWI.

The center of 5SW2 is grounded.

The relay contacts of the up relays UPI and UR2 and the relay contacts of the down relays DRI and DR2 are connected to both ends of the drive motors MTI and MR2, respectively, and can be switched between the B contact and the ground.

On the down side line DL of the lighting switch LS,
Relay contact try of timer relay TRY is inserted. This relay contact try is down relay DR1,
An NG contact is connected to the DR2 side, and an NO contact is connected to the retractable timer circuit RT side.

The retractable timer circuit RT includes transistors T1. Ding 2. It is equipped with capacitors CI and C2.

The up holding timer circuit UT includes transistors T3.2111. T4. It has capacitors C3 and C4, and a timer relay TRY is connected to the collector of transistor T4.

PRY in FIG. 1 is a passing relay circuit,
Similar to the conventional example, during a passing operation, this is for self-holding in conjunction with the retractable timer circuit RT, to turn up the retractable rad lamps L1 and 12, turn them on, and immediately turn them down.

Moreover, MSW is a manual switch, and by operating it, the retractable headlamp L1. L2 can be raised and lowered.

The operation of the tractor pull headlamp device having the above structure will be explained next.

■ When raising the retractable headlamp when the headlamp is stored. In this case, current flows from power supply E - up relay UR1, UR2 - sliding pattern switch 5SW1, 5SW2 - ground, turns on the up relay, and closes the relay contact. is switched to the B power supply, and the drive motors MT1 and MT2 are sequentially rotated. Therefore, headlamp L1. L2 is exposed.

At this time, the sliding pattern switches 5SW1, 5SW2 are connected to the drive motors MT1. It rotates with MT2, and when those insulating windows Is reach the top dead center, up relays LIR1 and LI
Turn off R2. As a result, the relay contact of the up relay is turned off, and the drive motor MT1. MT2 stops.

■ If you set the lighting switch to the first stage with the headlamp retracted, the retractable switch will not turn on in this case.
The small lamp and main lamps Ml and M2 light up, but no exposure operation is performed.

■ When the lighting switch is set to the second stage with the headlamp retracted. In this case, the same operation as shown in ■ above will occur.
When the sliding pattern switches 5SW1.5SW2 are energized, the drive motors MT1. MT2 rotates and raises headlamps Ll and L2.

After the drive motor stops, up relays UR1 and U
The relay contact of R2 switches to the ground side, current flows from power source E to headlamp Ll, 12-up relay contact to ground, and main lamp M1. M2 or dimmer 01. C2 lights up in the exposed state.

■ When the lighting switch is turned off with the headlamp in the up state When the main lamp M1゜M2 of the headlamp 11.12 lights up, the transistor T3 is turned on in the up holding timer circuit U, and the base of the transistor T4 is turned on. No current flows through the transistor T4, turning off the transistor T4.

In this state, charge is accumulated in the capacitor C4.

Therefore, when the lighting switch LS is turned off, in this timer circuit tJT, the 1-transistor T3 is turned off, its collector voltage rises, the transistor T4 is turned on, and the charge of the capacitor C4 flows to the base.

As a result, power supply E - key switch KS - down relay D
R1, DR2-[Moving pattern switch 5SW1.5SW
2 - Earth, current flows and turns on the down relay.

Due to the operation of down relays DR1 and DR2, the relay contacts of the down relays are activated to drive lJ motors MT1. M
Connect T2 to B power supply and reverse. In this way, drive motor MT1. By reversing MT2, headlamps L1 and L2 are retracted.

This operation is performed by the sliding pattern switch 5SWI.

5SW2 insulation window IS reaches bottom dead center and down relay DR
1. Stops when DR2 is turned off.

■ If you turn off the key switch and turn on the main lamp while the lighting switch is off. In this case,
By the operation shown in (■) above, the head lamp L1. The main lamps M 1 and M 2 of L2 are exposed and lit.

In this state, even if the headlamp is turned off, since the down line DL is turned off by the key switch KS, the down relays DR1 and DR2 are not energized, and the headlamp does not retract.

■ When the key switch is turned on with the retractable headlamp in the up state. In this case, in the up-holding timer circuit UT, the charge in the capacitor C4 has already been discharged, so the transistor T4 does not turn on, and therefore the timer circuit UT does not turn on. Relay TRY also does not turn on.

Therefore, the relay contact tryt is on the tNc side and holds the down side line in the open state, and the headlamp L1. L
The automatic retracting operation of 2 does not occur.

This headlamp L1. In order to store L2, the main lamps Ml and M2 must be turned on by the lighting switch LS.
is turned on, charge is stored in the capacitor C4 of the timer circuit UT, and then the circuit is turned off.

In this way, even if the headlamps Ll and L2 are left exposed after the key switch KS is turned off and the key switch KS is turned on again, the headlamps L1.
12 never performs the storage operation. Incidentally, the discharge time of the timer circuit UT can be appropriately set by the capacitor C4.

In the case of the above embodiment, the relay contact try is turned off by the timer relay TRY of the timer circuit UT while the headlamps 11 and 12 are on, so even if contact or disconnection occurs somewhere in the circuit, the down line DL is No current flows and no storage operation occurs.

(Effects of the Invention) Since this invention has the above configuration, unless the lighting switch is turned on to turn on the headlamp and then turned off, the timer circuit will operate and the drive motor will be driven to the storage side. There's nothing to do. Therefore, even if the key switch is turned off with the retractable headlamp exposed and then turned on again, the timer circuit will not work and the drive motor will not be driven to the retracted side, resulting in motor lock in winter, etc. There is no fear, and the driver does not feel uncomfortable.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example. LS...Lighting switch KS...Key switch Ll, L2...Headlamp URl, UR2...Up relay DR1, DR2...Down relay Ml, M2...Main lamp Dl, D2... Dimmer MTl, MT2... Drive motor T1-T4... Transistor C1-C4... Capacitor 5SW1.5SVV2... Surrounding pattern switch RT
...Retractable timer circuit UT...Timer circuit for up holding DL...Down drive line Patent applicant Nissan Motor Co., Ltd. Niles Parts Co., Ltd.

Claims (1)

[Claims] A retractable headlamp that is exposed and retracted by a drive motor, a lighting switch, a key switch, and a timer circuit that generates an output signal for an arbitrary period of time when switching the lighting switch from light on to off. A retractable headlamp device, wherein an output of the timer circuit is connected to a side that stores the drive motor, and an off contact of the key switch is connected to a side that disconnects the output of the timer circuit. .