JPS6364331B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control circuit for automotive lighting,
In particular, the present invention relates to a control circuit for a door key hole, an ignition key hole, and a lighting lamp inside a vehicle, which are required when a passenger enters the vehicle.

Lighting lights that are generally needed when a passenger gets into a car and starts driving include a lamp that illuminates the key hole of the ignition key on the side of the steering column (for example, Japanese Utility Model Application No. 50-31645),
There are lamps that illuminate the keyhole of the outer handle attached to the outside of the door (for example, Japanese Utility Model Publication No. 53-156217), and room lamps that illuminate the interior of the vehicle (for example, Japanese Utility Model Publication No. 50-34946). .
Conventionally, when turning on these lights, if the lamp is located in the keyhole of the ignition key, the keyhole is illuminated for a few seconds after the door is opened, and if the lamp is located in the keyhole of the outer handle, the keyhole is illuminated for several seconds after the door is opened. When the steering wheel is operated, the key hole is illuminated for a few seconds, or if it is a room lamp, the lamp is illuminated for several seconds after the door is opened to illuminate the interior of the vehicle.

However, with these conventional lighting lights, the lighting was turned on simply by opening the door or operating the outer handle, so when getting out of the car, opening the door would cause the ignition key hole to turn on. The lamp and room lamp turn on, and when you try to close the door by operating the outer handle when getting out of the car, the lamp in the keyhole of the outer handle turns on, which is extremely wasteful from an energy saving perspective. It had the disadvantage of being.

The present invention has been made in order to eliminate the drawbacks of the conventional devices, and it is possible to turn on the door key hole, ignition key hole, and vehicle interior lighting only when riding as described above, which are necessary when riding. For example, the light does not turn on when the door is opened when exiting the vehicle or when the outer handle is operated, eliminating unnecessary waste.
The purpose is to provide a control circuit for automotive lighting that saves energy.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a control circuit for an automobile lighting lamp according to an embodiment of the present invention, in which 1 is a door open detection circuit that detects that a door is open and generates a door open signal a, and 2 is a door open detection circuit. Upon receiving the door open signal a from the detection circuit 1, the door is closed and this signal a
3 is a delay circuit that holds the door open signal a for a predetermined time even if the input stops, and outputs the door close signal a' after the predetermined time has elapsed after the door is closed. 3 indicates that the outer handle is being operated. 4 is the AND of the inverted signal of the door close signal a' of the delay circuit 2 and the outer handle operation signal b of the outer handle operation detection circuit 3. This is an AND circuit that detects when the door is closed from both input signals, the door close signal a' is input, and the outer handle is operated, and generates the illumination light turn-on signal c. It constitutes a lamp lighting signal generation circuit. 5 is a timer circuit which is operated by the illumination lamp lighting signal c of the AND circuit 4 and generates an output for a predetermined time; 6 is turned on by the output d of the timer circuit 5;
Transistor as a switch means to be turned off,
Reference numeral 7 denotes an illumination light whose blinking is controlled by this transistor 6, and this illumination light 7 may be a lamp in the keyhole of an ignition key, a lamp in the keyhole of an outer handle, a room lamp, or the like.

Next, the operation will be explained.

First, let us consider a case where the user puts his hand on the outer handle and opens the door in order to get into a car, with the illumination light 7 turned off and the door closed.
In this case, when you put your hand on the outer handle,
The outer handle operation detection circuit 3 detects the operation of the outer handle and makes its output signal b high, and the signal b is input to the AND circuit 4. The other input of the AND circuit 4 is that since the door is closed, the door open detection signal a of the door open detection circuit 1 becomes low, and therefore the door close signal a' of the delay circuit 2 also becomes low. The inverted signal of the door close signal a' becomes high, and the illumination light turn-on signal c, which is the output of the AND circuit 4, becomes high.As a result, when the outer handle is operated, the timer circuit 5 is driven and the timer circuit 5 starts the set time. The output signal d is set to high. Then, the transistor 6 is turned on for the set time, and the lighting lamp 7 is turned on for the set time. When the door is opened after operating the outer handle, the door open detection circuit 1 sets the door open detection signal a to high, and as a result, after a delay time caused by the delay circuit 2,
The output c of the AND circuit 4 becomes low. However, since the timer circuit 5 lights up the illumination light 7 for the above set time from the time when the outer handle is operated, whether the door is opened or not after that does not affect the operation of this device, and the above set time does not affect the operation of the device. When the time period elapses, the illumination light 7 is turned off.

Next, consider the case where, in order to get out of the car, the driver opens the door by operating the inner handle and closes the door without touching the outer handle.
In this case, the output a of the door open detection circuit 1 becomes high first, but the door close signal a' of the delay circuit 2 remains the door close signal for the time set in the delay circuit 2 even after the door is closed after exiting the vehicle. a' is not output and becomes high, and as a result, one of the input signals of the AND circuit 4 becomes low for that time.

Therefore, even if the output b of the outer handle operation detection circuit 3 becomes high within this time after getting off the vehicle, the output c of the AND circuit 4 remains low and does not become high, and the illumination lamp 7 does not light up.

In addition, when you close the door by placing your hand on the outer handle, the output b of the outer handle operation detection circuit 2 becomes high at that moment, and the door close signal a' is not output and remains high for only the set time. , the output a of the door open detection circuit 1 becomes high, and the output of the delay path 2 also tries to become high, but one input of the AND circuit 4 does not become high at that moment because of the delay circuit 2, and the illumination Light 7 does not light up. After closing the door, the driver immediately releases his hand from the outer handle, so the output b of the outer handle operation detection circuit 2 becomes low, and the illumination light 7 no longer lights up. Therefore, when getting out of the car, the illumination light 7 is not turned on, and waste can be avoided.

The purpose of the delay circuit 2 is to prevent the lighting lamp 7 from being turned on by providing a delay time of several seconds when the door is locked while holding the outer handle. Therefore, this delay circuit 2
In cases where there is no such device, if you lock the door while holding the outer handle, the lights will turn on momentarily, making you wonder if the lights will turn off when you leave the car. The circuit 2 eliminates such concerns, and also makes the device even more energy-saving by not turning on the light when unnecessary.

In addition, in the above operation description, when the lighting lamp 7 is on and the door is closed,
When the door is locked, first put your hand on the outer handle to turn on the illumination light 7, that is, the lamp in the key hole of the door key on the outer handle, as described above. If the door is unlocked by inserting the door key, this operation can be easily performed using the light from the lamp. The subsequent operations are exactly the same as in the above case.

Figure 2 shows a more specific example of the circuit in Figure 1,
In the figure, a door switch 11 is connected in series with a resistor 12 between the power supply +V and the earth E, and is turned off when the door is closed, and constitutes the door open detection circuit 1 shown in FIG. 13, 14, 15
1 are two resistors and a capacitor that constitute the delay circuit 2 in FIG. 1, 16 is a transistor that turns on when the output of the delay circuit 2 becomes low, and 17 is a relay coil connected to the collector of this transistor 16. , 18 is a relay contact that is opened and closed by the coil 17 of this relay, 19 is an outer handle switch connected in series with this relay contact 18, and 20 is when both the relay contact 18 and the outer handle switch 19 are closed. The relay contact 18, the outer handle switch 19, the transistor 20, etc. constitute the illumination lamp lighting signal generating circuit 4 shown in FIG. 1. Further, 21, 22, and 23 are capacitors and two resistors that constitute the timer circuit 5 in FIG. 1, 6 is a Darlington connection transistor that is turned on and off by the output of the timer circuit 5 as in FIG. A lighting lamp connected to the collector of the

Next, the operation will be explained.

First, when the door is closed, turn the door switch 11
is off, transistor 16 is off,
Since no current flows through the coil 17 of the relay, the relay contacts 18 are in the on state. When the outer handle switch 19 is turned on by operating the outer handle in this state, the transistor 20
When turned on, the output of the illumination lamp lighting signal generation circuit 4 becomes high, the capacitor 21 is charged, the transistor 6 is turned on, and the illumination lamp 7 is turned on. The timer time in this case is determined by the capacitor 21 and the resistor 22.

Conversely, if the door is open, press door switch 1.
1 is on, transistor 16 is on, current flows through relay 17, and relay contact 1
8 is in the off state. In this state, even if the outer handle switch 19 is turned on, the transistor 20 is not turned on, and the capacitor 21 is not charged.
The lighting lamp 7 does not light up.

According to the lighting light control circuit of this embodiment having such a configuration and operation, the lighting light is turned on only when the outer handle is operated with the door closed, and the lighting light is turned on only when the outer handle is operated with the door closed. Since the lights do not turn on even when the door is closed by operating the steering wheel, the lights do not turn on when getting out of the car, which saves unnecessary energy consumption.

As described above, according to the present invention, there is provided an outer handle operation detection circuit that detects that an outer handle attached to the outer surface of an automobile door is being operated and outputs an operation signal, and an outer handle operation detection circuit that detects the open state of the door. a door open detection circuit that outputs a door open signal; and a door open detection circuit that maintains the door open signal for a predetermined period of time even if the door is closed and input of the door open signal stops while the door open signal is being input; a delay circuit that outputs a door close signal after a predetermined period of time has elapsed after the door is closed, and an illumination lamp that generates an illumination light turn-on signal only when the door close signal is input while the outer handle operation signal is input. By comprising a lighting signal generation circuit, a timer circuit that is activated by the output of the illumination lamp lighting signal generation circuit and generates an output for a predetermined period of time, and a switch means that is turned on and off by the output of the timer circuit to control the lighting of the illumination lamp. This has the effect of preventing the lights from turning on when getting out of the car, thereby avoiding wasteful energy consumption.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a control circuit for an automobile lighting lamp according to an embodiment of the present invention, and FIG. 2 is a more specific circuit diagram of the circuit shown in FIG. DESCRIPTION OF SYMBOLS 1...Door opening detection circuit, 3...Outer handle operation detection circuit, 4...Lighting lamp lighting signal generation circuit, 5...Timer circuit, 6...Transistor (switching means), 7...Lighting lamp.

Claims (1)

[Claims] 1. In the control device for the ignition key hole, door key hole, and room lamp lights that are turned on when a passenger gets into a car, the control device detects that the outer handle attached to the outside of the car door is being operated. an outer handle operation detection circuit that detects and outputs an operation signal; a door open detection circuit that detects the open state of the door and outputs a door open signal; and an outer handle operation detection circuit that detects the open state of the door and outputs a door open signal; A delay circuit that holds the door open signal for a predetermined time even if input of the door open signal stops and outputs a door close signal after a predetermined time has elapsed after the door is closed, and the outer handle operation signal is inputted thereto. a lighting lamp lighting signal generation circuit that generates an illumination lamp lighting signal only when the door close signal is input in the state, and a timer circuit that is activated by the output of the lighting lamp lighting signal generation circuit and generates an output for a predetermined period of time; A control circuit for a lighting lamp for an automobile, comprising a switch means that is turned on and off by the output of the timer circuit to control lighting of the lighting lamp.