JPS5846915Y2 - Vehicle interior light control device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a control device that turns on an interior light for a predetermined period of time in response to the operation of a means for detecting the door opening/closing state, and in particular stops its operation for a certain period of time in relation to the passenger's preparation state for exiting the vehicle. The purpose is to

Conventionally, a switch that detects the opening and closing of a door is directly connected to an interior light (hereinafter referred to as an interior lamp), and the interior lamp is turned on only while the door is open, and turns off when the door is closed.45 The lighting circuit is well known. .

In this conventionally known configuration, when the door is closed after getting into the car at night, the interior lamp goes out.For example, in order to find the ignition key slot, seat belt, etc., a switch is activated to forcibly turn on the interior lamp, and the user then goes on to complete his/her errands. This was extremely inconvenient because the switch had to be reset after the operation was completed.

As a countermeasure, the above inconvenience can be resolved by adding a timer that keeps the lamp on for a certain period of time even when the door is closed.
There is a drawback that the interior lamp remains on for a while even after the door is closed when exiting the vehicle.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a simple control device that uses a timer to turn on the light for a certain period of time after the door is closed, and can temporarily stop its operation when exiting the vehicle.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a control circuit section which receives power from an on-vehicle battery 2 and controls lighting of an indoor lamp 4 by signals a and b from an ignition key switch 3 and a door switch 5.

The door switch 5 is a switch that closes when the door is opened and opens when the door is closed, and constitutes the first detection switch of the present invention.

Since this door switch is connected to the indoor lamp 4 and the battery 2 in series via the diode 17, the indoor lamp 4 is turned on and off as the door is opened and closed.

The control circuit section 1 consists of a lighting circuit 1a and a prohibition circuit 1b. In the lighting circuit 1a, 12 is a capacitor that is charged through a diode 15, a resistor 20, and a diode 16 when the door switch 5 is opened.

This capacitor 12 has a discharge circuit that passes through a transistor 8 and a resistor 21 when the door switch 5 is opened, and forms a time limit circuit that progresses from the charging state to the discharging state.

The transistor 8 is turned on in the charging state.

Reference numeral 9 denotes a transistor that drives the relay 10 using the on-current of the transistor 8.

A contact point of the relay 10 is connected to the room lamp 4.

In the inhibition circuit 16, 11 is a capacitor that is charged through a diode 13 and a resistor 18 when the ignition key switch 8 is closed.

This capacitor 11 has a discharge circuit that passes through a resistor 19 and a transistor 6 when the ignition key switch 3 is opened, and when the capacitor 11 is in a discharged state, a discharge circuit passes through a resistor 19 and a transistor 6.
is turned on.

7 is turned on by the on-current of the transistor 60, and prevents the capacitor 12 from being charged when the door switch 5 is opened.

Also, when transistor 6 turns on, diode 1
4 becomes the ground potential, so the relay drive transistor 9 is also turned off.

When the capacitors 11 and 12 are charged, they are charged instantly;
It is designed to take a certain amount of time during discharge.

That is, a charging circuit including a capacitor 11, a resistor 18, and a diode 13 has a small time constant, so the value of the resistor 18 is set to a small value, whereas a discharging circuit including a capacitor 11, a resistor 19, and a transistor 6 has a small value. In order to increase the time constant, the value of the resistor 19 is increased.

Similarly, the charging and discharging circuit of the capacitor 12 is also connected to the charging resistor 2.
By reducing the value of 0, the charging time constant is reduced,
By increasing the discharge resistance 21, the discharge time constant can be increased.

The operation of this configuration will be explained with reference to the time chart shown in FIG. 2.

First, when the door is opened and the door switch 5 is closed, the indoor lamp 4 lights up and at the same time the capacitor 12 is connected to the diode 1.
5. Charge through the path of resistor 20 and diode 16.

Next, when the door is closed and the door switch 5 is turned on, the charge in the capacitor 12 is discharged through the emitter base of the transistor 8 and the resistor 21.

Transistor 8 is turned on for the discharge time T1, transistor 9 is turned on by the on-state current of transistor 8, the contact of relay 10 is closed, and indoor lamp 4 continues to be lit.

On the other hand, when the ignition key switch 3 is closed within the timed activation time Tl, the capacitor 11 is rapidly charged through the path of the diode 13 and the resistor 18.

When capacitor 11 is charged, transistor 6 is turned on,
When the transistor 6 is turned on, the diode 14 becomes forward biased, the base current of the transistor 9 is cut off, the transistor 9 is turned off, the contact of the relay 10 is opened, and the indoor lamp 4 is turned off.

The charging time constant T2 of the capacitor 11 is approximately 200 to 30
If it is smaller than 0m5, the human sense will feel as if the light is turned off immediately after closing the ignition key 3.

Next, when the ignition key switch 3 is opened, the charge in the capacitor 11 is discharged.

During the discharge time T3, the transistor 6 is on, and the on-current of the transistor 6 turns on the transistor T, which reverse biases the diode 15. Therefore, even if the door switch 5 is closed, the capacitor 12 is not charged.

Therefore, during the discharge time T3 of the capacitor 11, the indoor lamp 4 is turned on only while the door switch 5 is closed, or is turned off immediately when the door switch 5 is opened.

In addition, in the above-mentioned embodiment, the ignition key switch 3 is used to detect the passenger's preparation state for exiting the vehicle.
It is also used to detect the state of preparation for driving, and is useful for turning off the interior lamps when the state is ready for driving.

In addition, a seat switch that detects whether the driver is seated or not can be used to detect the preparation state for getting off the vehicle.

An interior light (interior lamp 4) is attached to the ceiling of the vehicle.

In addition to a so-called room lamp, it may also be one that partially illuminates the interior of the vehicle.

As mentioned above, in this invention, the open/closed state of the door is detected, a time signal with a fixed time width is created, and the interior light is turned on based on the time signal, so lighting can be performed even after the door is closed. At the same time, by detecting the driving preparation state,
In order to quickly turn off the lights, the lights can be turned on even after the door is closed until the driving preparation state is completed, for example, for the time required to operate a key switch, and the intrusive lighting can be turned off after the driving preparation state is completed. By detecting the preparation state for exiting the vehicle, the lamp lighting based on the time signal is prohibited within a predetermined period of time, so if exiting the vehicle is completed within a certain period of time after the detection of the preparation state for exiting the vehicle, the interior light will only be turned on when the door is opened. It has the excellent effect of turning on the light and immediately turning it off when the door is closed.

[Brief Description of the Drawings] Figure 1 (-i) is an electrical wiring diagram showing one embodiment of the control device of the present invention, and Figure 2 is a time chart diagram for explaining the operation of the device shown in Figure 1. 1a. ...Lighting circuit, 1b...Prohibition circuit, 3...Ignition key switch forming the second detection switch,
4...Indoor light (indoor lamp), 5...Door switch forming the first detection switch, 8, 12, 15, 16゜2
0.21...Transistor, capacitor, diode, diode, resistor, resistor, 9,1 that constitutes the time plate circuit
0...Transistors and relays that make up the lighting drive circuit

Claims (2)

[Scope of utility model registration request] (1) A first detection switch that detects opening/closing of a door, a second detection switch that detects a state in which the vehicle is prepared to run by an occupant and a state in which the occupant is ready to exit the vehicle, and a detection signal from the first detection switch. a lighting circuit that generates an interior light lighting signal of a certain time width in response to the detection signal of the second detection switch; disappear into
An interior light lighting control device for a vehicle, comprising: a prohibition circuit that inhibits generation of the interior light lighting signal for a predetermined period of time when the exit preparation state is detected. (2) The vehicle interior light lighting control device according to claim 1, wherein the second detection switch is an ignition key switch.