JPS5839238Y2 - Auto-maintaining device for vehicle room lights - Google Patents

Description

[Detailed description of the invention] This invention brightens the interior of the vehicle and the surroundings of the vehicle by turning on the interior light of the vehicle for a predetermined period of time when the vehicle is stored in a garage at night or driven on the road and the occupant leaves the vehicle. This invention relates to a device for automatically keeping a vehicle room light turned on.

Conventionally, when driving a vehicle at night, the driver would generally turn off the various lamps and all other devices before leaving the vehicle. The surroundings of the vehicle were dark and moving at a distance from the vehicle made it inconvenient and, in some cases, dangerous.

On the other hand, as the purpose of delaying lights out,
As disclosed in Publication No. 33, a timer is constituted by a bimetal and a relay. For example, when a room light switch is closed, the timer is activated, and then when the switch is opened, the bimetal remains closed for a predetermined period of time, and the room light is turned off. Although there is a known device that turns on a room light switch for a predetermined period of time, this device requires an operation to close the room light switch and then open the switch, which is cumbersome.

In addition, since the timer always activates when the switch is operated, the room light remains on even when you want it to turn off immediately, which not only wastes power but also obstructs visibility. In order to solve this problem, if a dedicated switch is provided for the timer, the number of switches increases, resulting in high cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for automatically keeping a vehicle room light turned on, which eliminates the above-mentioned drawbacks.

Generally, when a vehicle is parked at night, the driver stops the operation of various lamps and all devices before leaving the vehicle, but this invention allows parking the vehicle at night without requiring any special operations. The system automatically keeps the room light turned on for a predetermined period of time with only the necessary operations when leaving the vehicle and regardless of the room light dedicated switch or door switch.

A timer is provided that is activated by simply turning off the main switch and then turning off the light switch, and the interior light is automatically kept on for a predetermined period of time determined by the timer, allowing the occupant to leave the vehicle. This is a device that can be used simply by adding a simple electronic circuit.

Also, when the button is pressed while driving day or night, the main switch is in the ON state and the timer does not operate, so it does not obstruct visibility.

An embodiment of the present invention shown in the drawings will be described below.

Reference numeral 1 denotes a power source, which is a battery mounted on the vehicle, and its negative electrode side is grounded.

Reference numeral 2 denotes a main switch, which corresponds to an ignition switch in a gasoline engine vehicle, for example.

Reference numeral 3 denotes a light switch for turning on headlights, tail lights, side lights, and number lights (not shown).

The main switch 2, light switch 3, and room light 4 are each connected in parallel to a power source 1.

5 is a timer, and the timer 5 includes a timer capacitor T,
Consisting of a time limit base resistor 8, a time limit adjustment resistor 9,
The capacitor 7 and resistor 8 are connected in parallel.

IO is a switching element interposed in the lighting circuit of the room light 4, and the switching element is, for example, a transistor 10, the base of which is connected in series to the light switch 3 via the resistor 8, and the transistor IO is The collector is connected to the room light 4.

6 is when the main switch 2 is turned on. OFF signal timer 5
This is a transmitting device that sends signals to the switch element IO.

The transmitting device 6 consists of a transistor II for sending a signal to the transistor IO by opening and closing the main switch 2, and base resistors 12 and 13 of the transistor 11, and the base of the transistor II is connected in series to the main switch 2 through the resistor 12. At the same time, the collector of transistor IN is directly connected to the base of transistor 10.

A collector of a transistor 10, a room light dedicated switch 14, and a door switch I5 are connected in parallel to the negative electrode side of the room light 4, respectively.

The door switch 15 is linked to the opening and closing of the door, and is closed when the door is opened to turn on the room light 4.

Next, the operation of the above configuration will be explained.

When the vehicle is running day and night, main switch 2 is in the ON state, so power supply 1 → main switch 2 → resistor W2
→Base current flows in the circuit of base → emitter → ground of transistor IN, and transistor tt becomes conductive, but since the base of transistor 0 is directly connected to the collector of transistor Iτ, conduction of transistor II causes transistor 0 to The base is grounded through the transistor II, and the base potential of the transistor IO falls regardless of whether the light switch 3 is ON or OFF.
The transistor IO is not conductive and therefore the room light 4 is not illuminated.

When the main switch 2 is in the ON state, the room light 4 does not light up regardless of whether the light switch 3 is opened or closed.

On the other hand, when the vehicle is stored in a garage or parked on the street at night and the driver leaves the vehicle, generally, the various lights and all other equipment that were in operation at the moment are stopped, and then the door is opened and closed. The driver can turn on the room light 4 by simply turning off the main switch 2 and then turning off the light switch 3, which is included in the operations necessary for getting out of the car. It can be automatically kept on for a predetermined period of time.

That is, the main switch 2 and the light switch 3 are in the ON state immediately after the vehicle is parked, and when the main switch 2 is first turned OFF (0N-), the power is turned off] → the light switch 3
→ Resistor 8 → Transistor 100 Base → Emitter → The base current flows in the grounded circuit, transistor IO becomes conductive, and the room light 4 lights up as the circuit of power supply I → room light 4 → transistor IO → ground is formed. continue.

Next, when the light switch 3 is turned ON-+OFF, the charge in the time capacitor 7, which was charged from the power supply through the switch 3, is discharged through the time base resistor 8 and the base and emitter of the transistor τ0. The discharge current causes the transistor 10 to remain conductive for a predetermined period of time.
The room light 4 is supplied with power for a predetermined time determined by the discharge time constant of the capacitor 7 and turns on, brightening the interior of the vehicle and the surroundings of the vehicle.Next, the driver and passengers open and close the door to exit the vehicle and leave the vehicle. Make sure to use it when you use it.

When the switch 3 is turned off and a predetermined period of time elapses, the charge in the timer capacitor T decreases and the transistor IO becomes non-conductive, and the room light 4 is automatically turned off.

Note that it is not necessary to automatically keep the room light 4 turned on, and normal turning on or off can be performed by operating the room light dedicated switch I4 or the door switch 15.

As described above, when parking a vehicle at night and leaving the vehicle, the present invention is as simple as turning off the main switch and then turning off the light switch, which is also one of the operations required when exiting the vehicle. You can automatically keep the room light on for a predetermined time by turning the light switch to O.
Since the lights are turned on or off for a limited time from the moment the FF is turned on, the next time the door is opened and closed, the passenger gets out of the vehicle, and the vehicle is left, the interior of the vehicle and the surroundings of the vehicle are brightened, making it easier for the occupants to move and ensuring safety. Equal effect is the dog.

Also, since the timer does not operate when the vehicle is running day or night, it does not obstruct visibility.

Furthermore, since it is possible to automatically maintain the lighting of the room light by using the main switch and light switch already installed in the vehicle, there is an advantage that there is no need to provide a separate switch exclusively for automatically maintaining the lighting.

[Brief explanation of the drawing]

The figure is an electric circuit diagram showing an embodiment of the automatic lighting maintenance device for a vehicle room light according to the present invention. 2... Main switch, 3... Light switch, 4...
- Room light, 5... Time limit device, 6... Transmission device, 10... Switch element.

Claims (1)

[Scope of utility model registration request] A main switch, a light switch, and a room light each connected to a power source, a switch element interposed in a lighting circuit for the room light, a transmitter that provides ON/OFF signals of the main switch to the switch element, and the main switch. and a timer that detects that both the light switches are turned off and keeps the switch element ON for a predetermined period of time, and the timer automatically keeps the room light turned on for a predetermined period of time. An automatic maintenance device for turning on vehicle interior lights.