JPH0132586Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a control device for a lighting lamp for an automobile, and particularly to a control device that can obtain an appropriate lighting time when opening and closing a door.

[Conventional technology]

BACKGROUND ART Lighting is sometimes required to operate a door key or ignition key, such as when starting a car at night, and for this reason more and more cars are equipped with dedicated lighting lamps. Conventionally, there is a control device for a lighting lamp for an automobile of this type, as shown in, for example, Japanese Utility Model Application Publication No. 59-336, and FIG. 4 is a block diagram showing the circuit configuration thereof.

That is, in the figure, 1 is a door handle detection circuit that detects that the door handle (outside handle) of the automobile is operated, and 2 is a door open/close detection circuit that detects that the door is opened. Reference numerals 1 and 2 each include a door handle switch (door key switch) and a door opening/closing switch (door switch). 3 is an OR circuit into which the outputs of the detection circuits 1 and 2 are input; 4 is a timer circuit which inputs the output of this OR circuit 3 via a switch circuit 5 and outputs a drive signal for a predetermined time; 6
turns the lighting lamp 7 ON and OFF using the drive signal.
This is a switch circuit that allows

In an automobile equipped with a control device having such a configuration, when a driver operates a door handle from the outside, the door handle detection circuit 1 detects the operation. The output of this detection circuit 1 is input to an OR circuit 3, which activates a timer circuit 4, and a drive signal is given to a switch circuit 6, which sends an illumination lamp 7.
lights up for a predetermined period of time. Therefore, the driver can unlock the door by inserting the key into the keyhole of the door key using the illumination. Here, after releasing the door lock, if the driver has to do something longer than the set time of the timer circuit 4, the output of the drive signal to the switch circuit 6 is stopped.
The illumination lamp 7 is turned off. However, when the driver finishes his errands and opens the door to get into the vehicle, the door opening/closing detection circuit 2 detects that the door has been opened. Then, the output of door opening/closing detection circuit 2 is OR
The signal is input to the circuit 3, and the timer circuit 4 is activated again in the same way as when the door handle is operated, and the illumination lamp 7 is turned on for a predetermined period of time. The driver can now start the engine by operating the ignition key.

In this way, the illumination lamp 7 can be turned on for a predetermined period of time in conjunction with the respective operations of the door key switch and the door opening/closing switch, which is useful when starting a car at night. Note that when the door handle is operated and the door is opened while the illumination lamp 7 is on, the illumination lamp 7 continues to be on for a predetermined period of time from the time the door is opened.

[Problem that the invention attempts to solve]

The conventional control device for automotive lighting lamps is configured as described above, and since the control of each lighting by operating the door handle and opening the door is performed by the common timer circuit 4, the lighting lamps 7 had the problem that the same lighting control was performed regardless of whether the door key switch or the door opening/closing switch was used, so the lighting time could not be changed, and the battery was consumed due to mischief with the door handle.
If a capacitor 8 is connected in series between the OR circuit 3 and the switch circuit 5 as shown by the dotted line in the figure to prevent this battery from being consumed, problems will occur in the operation of the door opening/closing switch, making it impossible to achieve both. .

This invention was made to solve these problems, and was designed to provide an appropriate lighting time for each operation of the door handle switch and door open/close switch, and to prevent battery consumption caused by mischief. A lighting lamp control device is provided.

[Means for solving problems]

The control device for automotive lighting lamps of this invention is
A door handle detection circuit that detects the operation of the door handle and a door open/close detection circuit that detects the opening of the door are provided, and a one shot timer circuit that is activated when the door handle starts to be operated is provided. This device includes a drive timer circuit that outputs a drive signal for a predetermined period of time based on the output of the detection circuit, and a switch circuit that lights the illumination lamp in accordance with the drive signal.

[Effect]

The one shot timer circuit is activated when the door handle is operated, and the drive timer circuit outputs a drive signal for a predetermined period of time based on the output of this timer circuit and the output of the door opening/closing detection circuit to light the illumination lamp. At this time, the setting time of the one-shot timer circuit is short, and the lighting time of the illumination lamp is controlled by this setting time and the setting time of the drive timer circuit, so it is possible to prevent battery consumption due to mischief with the door handle, etc. Each lighting time can be changed by operating the door handle and opening the door [Embodiment] FIG. 1 is a block diagram showing the circuit configuration of a control device for a lighting lamp for an automobile according to the invention. In the figure, 11 is a door handle detection circuit that detects that the door handle of the automobile has been operated;
1 is a door opening/closing detection circuit for detecting that the door is opened, and these detection circuits 11 and 12 are respectively constituted by a door handle switch and a door opening/closing switch, as in the conventional case. Reference numeral 13 denotes a one-shot timer circuit (switch circuit) connected to the door handle detection circuit 11, which is activated when the door handle starts to be operated. 14 is a switch circuit connected to the door opening/closing detection circuit 12;
The output of 4 is input to the OR circuit 15 together with the output of the one-shot timer circuit 13. 16 is this
A drive timer circuit 17 outputs a drive signal for a predetermined time based on the output of the OR circuit 15, and a switch circuit 17 lights the illumination lamp L in accordance with the drive signal.

FIG. 2 shows a specific circuit example of the control device having the above configuration, and the same reference numerals as in FIG. 1 indicate corresponding parts. Door handle detection circuit 11,
The door opening/closing detection circuit 12 includes a door handle switch 11a and a door opening/closing switch 12a, respectively. One-shot timer circuit 13
has a diode D1 and a capacitor C1 connected in series to a current limiting resistor R1, a series circuit of resistors R2 and R3 is connected in parallel with this capacitor C1, and a connection point between these resistors R2 and R3 is connected.
The base of NPN transistor Q1 is connected,
Furthermore, the emitter of transistor Q1 is a diode D.
2 to the door handle switch 11a. The switch circuit 14 has an emitter connected to the door opening/closing switch 12a via a diode D3.
has an NPN transistor Q2 connected to
Its base is connected to the connection point of resistors R4 and R5, and a diode D4 is connected between the base and emitter, and a resistor R6 is connected in series with this diode D4.
is connected. The diodes D5 and D6 have cathodes connected to the collectors of the transistors Q1 and Q2, respectively, and constitute an OR circuit 15.

The drive timer circuit 16 includes a PNP transistor Q3 and a capacitor C2, and the base of the transistor Q3 is connected to the anodes of the diodes D5 and D6 through a series circuit of resistors R7 and R8. The capacitor C2 is connected to the connection point between the resistors R7 and R8, and the resistor R9 is connected between the emitter and base of the transistor Q3. The switch circuit 17 includes the transistor Q
A series circuit of resistors R10 and R11 is connected to the collector of 3, and the base is connected to the connection point.
It consists of an NPN transistor Q4, and a protection diode D7 is connected to the transistor Q4. L1 and L2 are illumination lamps connected between the collector of the transistor Q4 and the DC power supply (positive side).

Next, the operation will be explained. First, operate the door handle from the outside and turn on the door handle switch 11a.
, the charge on the capacitor C1 of the one-shot timer circuit 13 is transferred to the resistor R2 and the transistor Q1.
is discharged through the base of the transistor Q1, and during this discharging, the transistor Q1 is turned on (conducting state). As a result, transistor Q3 of drive timer circuit 16
The base current flows through resistor R8, resistor R7, and diode D5 as the collector current of transistor Q1, and as transistor Q3 turns on,
Charge is stored in the capacitor C2 through the resistor R7. After that, the door handle switch 11a
Even if the transistor Q1 is turned on, when the discharge of the capacitor C1 is completed, the transistor Q1 is turned off, and the charge stored in the capacitor C2 is discharged through the transistor Q3 and the resistor R8, and during this time, the transistor Q3 is turned on. Therefore, the base current is applied to the transistor Q4, which turns it on (the current flowing from this transistor Q3 to the transistor Q4 becomes a drive signal), and the lighting lamps L1 and L
2 lights up. During this time, the driver can unlock the door key. When the discharge of the capacitor C2 is completed, the transistor Q3,
Q4 are both OFF, lighting lamps L1 and L2
goes out.

Next, the door is opened and the door open/close switch 12
When a turns on, the resistor R4 of the switch circuit 14
Base current flows into transistor Q2 through
Transistor Q2 is turned on. As a result, the base current of the transistor Q3 of the drive timer circuit 16 flows through the resistor R8, the resistor R7, the diode D6, the transistor Q2, the diode D3, and the door open/close switch 12a, and the transistor Q3
When turned on, charge is stored in the capacitor C2 through the resistor R7. At this time, if the door opening/closing switch 12a continues to be in the ON state, the transistor Q3 continues to be ON during that time, and the transistor Q4 is also in the ON state due to the flow of base current, and during this time the lighting lamps L1 and L2 continue to be lit. . Then, when the door opening/closing switch 12a is turned off, the capacitor C2 starts discharging from this point on, and the illumination lamps L1 and L2 go out at the same time as the discharging ends. While the illumination lamps L1 and L2 are on, the driver can operate the ignition key to start the engine.

Here, since the door handle can be operated from outside the vehicle, the door handle switch 11a may be turned off by mischief or the like.
Even if the lamps are left on continuously, the lighting lamps L1 and L
2 turns off after the time set by capacitors C1 and C2 of timer circuits 13 and 16 has elapsed, making it possible to prevent battery consumption. Figure 3 shows the above-mentioned illumination lamps L1 and L2.
This figure shows the timing of lighting control. Setting time T of timer circuit 13 by capacitor C1
1 is a short time (about 0.1 to 0.2 seconds), so the setting time T of the timer circuit 16 by the capacitor C2
By setting 2 to a long time (for example, 6 to 8 seconds or more), you can obtain enough lighting time to unlock the door key just by operating the door handle for a short time, and also make it possible to turn on the door after closing the door. The lighting time necessary for operating the ignition key is also ensured sufficiently, making it easier to start the car at night.
Moreover, as mentioned above, the door opening/closing switch 12a is
During the ON period T3, the illumination lamps L1 and L2 are lit not only while the door is open, but also for a certain period of time after the door is closed, making it easier for the driver to perform other operations inside the vehicle.

The illumination lamps L1 and L2 are door key illumination lamps, interior lamps, ignition key illumination lamps, etc., and it is also possible to use LEDs (light emitting diodes). Furthermore, this control device can also be applied to entrances of houses, etc. in addition to automobiles.

[Effect of idea]

As explained above, according to this invention, a one-shot timer circuit is provided that is activated when the door handle is started, and the lighting time of the lighting lamp is controlled based on the output of this timer circuit and the output of the door opening/closing detection circuit. As a result, an appropriate lighting time for the lighting lamp can be obtained for each operation of the door handle and opening/closing of the door, which has the effect of preventing battery consumption due to mischief with the door handle, etc. Furthermore, starting operations such as locking and unlocking the car at night are easy.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the circuit configuration of a control device for an automotive lighting lamp according to this invention, Fig. 2 is a circuit diagram showing a specific example of the circuit shown in Fig. 1, and Fig. 3 is a time chart showing its operation. , FIG. 4 is a block diagram showing a conventional example. 11...Door handle detection circuit, 12...Door opening/closing detection circuit, 13...One-shot timer circuit, 14...Switch circuit, 15...OR circuit,
16... Drive timer circuit, 17... Switch circuit, L... Lighting lamp.

Claims (1)

[Scope of utility model registration request] A door handle detection circuit for detecting that a door handle of a vehicle has been operated and a door opening/closing detection circuit for detecting that the door has been opened are provided, and a one shot timer circuit is provided which is activated when the door handle is started to be operated. An automobile characterized in that it is provided with a drive timer circuit that outputs a drive signal for a predetermined period of time based on the output of the timer circuit and the output of the door opening/closing detection circuit, and a switch circuit that lights up an illumination lamp in accordance with the drive signal. Control device for lighting lamps.