JPH0223465Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a control circuit for automotive lighting.

(Prior art) In general, automotive lighting lamps include lamps that illuminate the ignition key hole on the side of the steering column (hereinafter referred to as ignition key illumination), and lamps that illuminate the key hole of the outer handle attached to the outside of the door. There are lamps that illuminate the vehicle interior (hereinafter referred to as door key illumination) and room lamps that illuminate the interior of the vehicle. Conventionally, when turning on these lights, for example, after operating the outer handle, a door key illumination, an ignition key illumination, etc. are turned on for a set time by a timer. (Refer to Utility Model Publication No. 55-161739)
By the way, if the timer setting time is short, the lamp may go out before the key is inserted into the ignition key hole, so there is a general tendency to set the timer longer. However, in order to lengthen the setting time of the timer, it is necessary to increase the capacitance of the capacitor, and it is not desirable to make this setting time too long.

(Purpose of the invention) This invention was made in view of the above-mentioned problems, and even if you operate the outer handle and open the door after a while and get into the car, the ignition key illumination will not work. The object of the present invention is to provide a control circuit for a lighting lamp for an automobile that turns on and allows easy insertion of an ignition key.

(Structure of the invention) The feature of the structure is that in the control circuit of an automobile lighting lamp, when the outer handle is operated, the first switch device starts the timer circuit, and the door detection device starts the timer circuit and the door is opened by the door detection device. When this is detected, the timer circuit is started again by the first switch device.

(Effect of the idea) Since this idea is structured as above,
The effect is that the ignition key illumination can be turned on after the occupant gets into the vehicle, without increasing the timer setting time, even if there is a considerable time between operating the outer handle and getting into the vehicle.

(Example) An example of this invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of a control circuit for an automobile lighting lamp according to an embodiment of this invention. In the figure, 1 is an outer handle operation detection device that detects that an outer handle attached to the outer surface of a door of an automobile is being operated, and 2 is a door detection device that detects that the door is opened. 3 is an OR circuit as a first switch device that takes the logical sum of the outputs of both devices 1 and 2; 4 is a timer circuit that is started by the output of OR circuit 3 and generates an output for a predetermined time after the output is inverted; 5; is a second transistor which is turned on and off by the output of the timer circuit 4.
The switch devices 6 and 7 are connected in parallel with each other,
These are an ignition key illumination and a door key illumination that blink when the second switch device 5 is turned on or off.

Next, the operation will be explained.

Consider the case where a certain driver gets into a car. First, when the outer handle is operated, it is detected by the outer handle operation detection device 1, and the timer circuit 4 is activated via the OR circuit 3, and the second switch device 5 is turned on to trigger the timer set time. The front key illumination 6 and the door key illumination 7 light up. Therefore, the driver can unlock the door by inserting the key into the key hole of the door key illuminated by the door key illumination 7. After unlocking the door, if the driver has to do something longer than the time set on the timer, the second switch device 5 will be turned off after the time set on the timer has passed, and the ignition key illumination 6 and the door will be turned off. Key illumination 7 turns off. However, when the driver finishes his business and opens the door to get into the car, the door detection device 2 detects this, and the timer circuit 4 is started again via the OR circuit 3, and the second switch device 5 is activated. The ignition key illumination 6 and door key illumination 7 are turned on. Therefore, the driver can start the engine by inserting the key into the keyhole illuminated by the ignition key illumination 6.

In the above embodiment, a case was explained in which there was a time longer than the timer setting time between the operation of the outer handle and getting on the vehicle, and the two illumination lights turned off once and then turned on again when the door was opened. Even if you open the door and get into the car within the timer setting after operating the handle, the timer will start again when you get in the car, so the two illuminations will remain on from the time you open the door until the timer setting elapses. It is lit.

Figure 2 shows a more specific example of the circuit in Figure 1,
In the figure, 1a is a resistance 1 between the power supply +V and earth E.
This is an outer handle switch that is connected in series with 0 and turned on when the outer handle is operated, and constitutes the outer handle operation detection device 1 shown in FIG. A door switch 2a is connected in parallel with the outer handle switch 1a and is turned on when the door is opened, and constitutes the door detection device 2 shown in FIG. 11 is the outer door handle switch 1a or the door switch 2a
is a transistor (first switch device) that turns on when one of the transistors is closed. 12, 13, 14
1 is a capacitor and two resistors that constitute the timer circuit 4 in FIG. 1, and 5 is a Darlington connection transistor (second switch device) which is turned on and off by the output of the timer circuit 4, as in FIG.

Next, the operation will be explained.

First, when the outer handle is operated, the outer handle switch 1a is turned on, and the transistor 11 is turned on, thereby charging the capacitor 12 and turning on the transistor 5, so that the ignition key illumination 6 and the door key illumination 7 are turned on. The timer time after the outer handle switch 1a is turned off is determined by the capacitor 12 and the resistor 13.

Next, when the door is opened, the door switch 2a is turned on, and the transistor 11 is turned on again, so that the capacitor 12, which has been discharged since the outer handle switch 1a was turned off, is charged again, and the transistor 5 is turned on, causing the ignition to start. The key illumination 6 and the door key illumination 7 light up. When the driver gets in the car and closes the door, the door switch 2a is turned off, and after this door switch 2a is turned off, the capacitor 12 and the resistor 1
The ignition key illumination 6 and the door key illumination 7 continue to be lit for the timer time determined by 3 and 3.

By providing a capacitor as shown by the dashed line, when the outer handle switch 1a or the door switch 2a continues to be closed due to some malfunction, the transistor 11 is turned off and the ignition key illumination 6 and door key illumination 7 are turned on. This prevents the battery from being left unused and prevents the battery from over-discharging.

[Brief explanation of the drawing]

Fig. 1 is a block circuit diagram of a control circuit for an automotive lighting lamp according to an embodiment of this invention, and Fig.
FIG. 2 is a detailed circuit diagram of the figure. DESCRIPTION OF SYMBOLS 1... Outer handle operation detection device, 2... Door detection device, 3... First switch device, 4... Timer circuit, 5... Second switch device, 6, 7...
...Lighting light.

Claims (1)

[Scope of utility model registration request] An outer handle operation detection device that detects that an outer handle attached to the outer surface of a door of an automobile is operated; a door detection device that detects that the door is opened; and the outer handle operation detection device and the door detection device. A first switch device that is turned on and off by the OR signal of both outputs, a timer circuit that is started by the output of this first switch device and generates an output for a predetermined time after the output is inverted, and a timer circuit that is turned on by the output of this timer circuit. , comprising a second switch device that is turned off, and an ignition key illumination whose lighting is controlled by the second switch device, and the ignition key illumination is lit while the output of the timer circuit is generated. Control circuit for automotive lighting.