JPH0242519Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an interior light control device for a vehicle that can turn on the interior lights only for a predetermined period of time even if the door is locked after a passenger exits the vehicle by operating an operating member such as a door handle located on the outside of the vehicle. It is something.

2. Description of the Related Art Conventionally, vehicles have been equipped with interior lights such as room lamps, which are controlled by an interior light control device so as to be turned on by operating a lighting switch such as a door switch. However, it is not possible to turn on the interior lights from outside the vehicle, and for example, at night, after the occupants have exited the vehicle and locked the doors, it is too dark to inspect the interior of the vehicle from outside. It was a hassle to unlock the door and then open the door to turn on the door switch and turn on the interior lights.

The present invention was devised in view of the above drawbacks, and measures a predetermined time when the lighting switch is turned off.
By operating an operating member such as a door handle disposed on the exterior of the vehicle within the predetermined time period, the interior lights can be temporarily turned on from outside the vehicle only during the predetermined time period.

A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the first embodiment will be explained based on FIG. 1. Reference numeral 1 denotes a power source, and a diode _D1 for preventing backflow is interposed at the positive electrode of the power source. The negative pole of power supply 1 is grounded.

Reference numeral 2 denotes an oscillation circuit that outputs continuous pulses of a predetermined period, and is composed of an operational amplifier 3, resistors _R1 to _R7 , and capacitors _C1 and _C2 . operational amplifier 3
connects its non-inverting input side to the connection point of resistors R ₁ and R ₂ that divide the power supply 1 voltage, and connects the resistor R ₃
The inverting input side is connected to the output side via a capacitor _C1 , and the inverting input side is grounded via a capacitor C1, and is connected to the output side via a resistor _R4 . The output side of the operational amplifier 3 is connected to the positive electrode of the power supply 1 via a resistor _R5 , and is also connected to an integrating circuit composed of a resistor _R6 and a capacitor _C2 . One end of the resistor R ₇ is connected to the connection point between the resistor R ₆ and the capacitor C ₂ , and the other point a is configured as the output side of the oscillation circuit 2. Reference numeral 4 designates a first timer circuit that operates a timer from the time when a door switch 8, a second timer circuit 12, or a normally open contact 15, which will be described later, is turned off, and gradually switches the output signal from continuously on to off.

The first timer circuit 4 includes operational amplifiers 5 and 6, and a resistor.
R ₈ to R ₁₃ , capacitor C ₃ , diode D ₂ and
It consists of _D3 . Op-amp 5 connects its non-inverting input side to resistor _R8 that divides the power supply 1 voltage.
At the connection point with R ₉ , the inverting input side is connected to the positive pole of power supply 1 via resistors R ₁₀ and R ₁₁ , and the output side is connected to the resistor R _12.
are connected to the positive terminal of the power source 1 via the respective terminals. The connection point between resistors R ₁₀ and R ₁₁ is grounded via a diode D ₂ , a seat switch 7 that is turned on when the occupant is seated, and a door switch 8 that is turned on when the door is opened. The operational amplifier 6 has its inverting input side connected to the output side of the operational amplifier 5 via a diode _D3 , and is grounded after being connected in parallel to a capacitor _C3 and a resistor _R13 . Further, the non-inverting input side of the operational amplifier 6 is connected to a point a, which is the output side of the oscillation circuit 2.

9 amplifies the output of the timer circuit 4 and outputs the indoor light 10.
This is the drive circuit that lights up the .

The drive circuit 9 includes a PNP type first transistor T ₁ ,
It consists of an NPN type second transistor T ₂ , resistors R ₁₄ to R ₁₇ , and capacitors C ₄ and C ₅ that serve as a filter to prevent the oscillation nozzle from being transmitted to other circuits for the vehicle. The base side of the first transistor T ₁ is connected to the output side of the operational amplifier 6 via a resistor R ₁₄ and to the positive electrode of the power supply 1 via a resistor R ₁₅ . In addition, the first transistor T ₁
The emitter side of is connected to the positive terminal of power supply 1. The base side of the second transistor _T2 is connected to the collector side of the first transistor _T1 via a resistor _R16 , and is connected in parallel to a capacitor _C4 and a resistor _R17 and then grounded. Also, the second transistor T ₂
The emitter side is grounded, and the collector side is connected to the positive electrode of the power source 1 via the interior light 10. Furthermore, the collector side of the second transistor _T2 is grounded via a capacitor _C5 .

Incidentally, a surge absorbing capacitor _C6 is interposed between the positive electrode of the power supply 1 and the ground.

Reference numeral 11 denotes a room lamp switch which is operated manually and is composed of one movable contact 11a and three fixed contacts 11b, 11c, and 11d. The room lamp switch 11 has a movable contact 11a.
are connected to the positive terminal of the power supply 1 via the interior light 10, the first fixed contact 11b which is an ON contact is connected to the ground, the second fixed contact 11c is connected to the ground via the door switch 8, and the third fixed contact which is an OFF contact is connected to the positive terminal of the power supply 1 through the interior light 10. Contact 11
d is not connected to either.

12, a timer starts operating from the moment the door switch 8 is turned OFF, and within a predetermined time, when the door handle switch 14 (described later) is turned ON, the first
This is a second timer circuit that outputs to the timer circuit 4.
The second timer circuit 12 includes a PNP-type third transistor T ₃ , an NPN-type fourth transistor T ₄ and a fifth transistor T ₅ , a capacitor C ₇ , a relay 13 , a backflow prevention diode D ₄ , and a counter electromagnetic force of the relay 13 . It consists of a diode D ₅ for preventing power surges and resistors R ₁₈ to R ₂₄ . Relay 13 is coil 1
3a and a normally open contact 13b that closes when the coil 13a is excited. 3rd transistor
The base side of T ₃ is grounded through resistor R ₁₈ and door switch 8, and connected to power supply 1 through resistor R ₁₉ .
Connected to the positive terminal of Also, the third transistor
The emitter side of T ₃ is connected to the positive electrode of the power supply 1, and the collector side is grounded via a diode D ₄ , a resistor R ₂₀ , and a capacitor C ₇ . The fourth transistor _T4 connects the base side to the third transistor through the resistor _R21 .
Connect with the collector side of transistor T ₃ and
Grounded via resistor _R22 . In addition, the fourth transistor T ₄ has its emitter side grounded and its collector side connected to the connection point between resistor R ₂₀ and capacitor C ₇ .
Connected via _R23 . Fifth transistor _T5
has its base side connected to the collector side of the fourth transistor _T4 and is grounded via a resistor _R24 . Furthermore, the fifth transistor _T5 has its emitter side grounded and its collector side connected to the coil 1.
It is connected to the positive electrode of the power supply 1 via 3a. A diode _D5 is connected between both ends of the coil 13a.

14 is a door handle switch that is turned on and off in conjunction with the operation of a door handle provided on the outside of the door. The door handle switch 14 is
One end is connected to the normally open contact 13 at point b, which is the connection point between the diode D ₂ of the first timer circuit 4 and the seating switch 7.
b, and the other end is grounded.

Reference numeral 15 denotes a normally open contact of automatic return type, such as a touch switch, which is placed inside the vehicle, and one end is connected to point b, and the other end is grounded.

Next, the operation will be explained based on a waveform diagram in which the horizontal axis of FIG. 2 is time.

In the oscillation circuit 2, the operational amplifier 3 operates to oscillate, and the resistor
The second integrator circuit consists of R ₆ and capacitor C ₂ .
A substantially sawtooth waveform A as shown in the figure is formed and output from point a.

Now, when the movable contact 11a of the room lamp switch 11 is brought into conduction with the first fixed contact 11b, the interior light 10 is turned on continuously.

Next, when the movable contact 11a is electrically connected to the second fixed contact 11c, when the door is opened and only the door switch 8 is turned on, the interior light 10 turns on the door switch 8.
It lights up only while it is on, and turns off immediately when it is off.

Further, when the occupant takes a seat and turns on the seat switch 7 and operates the door switch 8, or when the normally closed contact 15 is operated, the movable contact 11a of the room lamp switch 11 switches to the second
Regardless of whether the fixed contact 11c or the third fixed contact 11d is electrically connected, the following operation is performed.

That is, the seat switch 7 and the door switch 8 are
When turned on, in the first timer circuit 4, the inverting input side potential of the operational amplifier 5 becomes a low level, and a divided voltage of the power supply 1 voltage is applied to the non-inverting input side, so that its output potential becomes a high level. For this reason,
The capacitor _C3 is charged almost instantaneously, and the potential on the inverting input side of the operational amplifier 6 becomes high level as shown in waveform B shown in FIG. In this case, if the high level potential of waveform B is set to be higher than waveform A, the output potential of operational amplifier 6 will be at a low level. Thus, the first transistor T ₁ is turned on as shown in FIG. 2, and the second transistor T ₂ is turned on, turning on the interior light 10.

Thereafter, when the door is closed and the door switch 8 is turned off, the inverted input potential of the operational amplifier 5 becomes high level, so its output side potential becomes low level.
Then, the discharge circuit made up of capacitor C ₃ and resistor R ₁₃ gradually starts discharging. Accordingly, the potential on the inverting input side of the operational amplifier 6 gradually decreases to a low level as shown in waveform B shown in FIG. Therefore,
The output side potential of the operational amplifier 6 becomes a low level only when the potential of waveform B is lower than the potential of waveform A, and the first transistor _T1 and the second transistor _T2 are intermittently turned on as shown in FIG. Well, in the end
It will remain in the OFF state. Therefore, the illuminance of the indoor light 10 gradually decreases and is finally turned off.

Similarly, when the normally open contact 15 is operated, the interior light 10 lights up when the normally open contact 15 is turned on, and when the normally open contact 15 is turned off, the illuminance gradually decreases and is finally turned off.

Furthermore, if the door is opened and then closed again,
In other words, after turning on the door switch 8 once, turn it on again.
When the second timer circuit 12 is turned OFF, the movable contact 11a of the room lamp switch 11 is activated regardless of the operation of the seat switch 7.
The following operation is performed regardless of whether the fixed contact 11c or the third fixed contact 11d is in a conductive state.

That is, when the door switch 8 is turned on, the third transistor _T3 is turned on in the second timer circuit 12.
become. Now, if we set the time constant of the charging circuit made up of resistor R ₂₀ and capacitor C ₇ as small as possible, charging of capacitor C ₇ will proceed in a short time.
Finally, conduction between the base and emitter of the fifth transistor T5 becomes possible. But the fourth transistor
T4 is ON while transistor T3 is ON, and during this time, the fifth transistor T5 is OFF.
Therefore, the coil 13a of the relay 13 is not excited, and therefore the normally open contact 13b also remains OFF.

After that, when the door switch 8 is turned OFF, the third transistor _T3 and the fourth transistor T4 are turned _off.
The capacitor C ₇ is turned off, and the discharge circuit consisting of the resistor R ₂₃ and the fifth transistor T ₅ starts discharging according to a predetermined discharge time constant. Therefore, the fifth
Transistor _T5 is ON for a predetermined period of time, during which time coil 13a of relay 13 is energized to turn on normally open contact 13b. If the door handle switch 14 is turned on by operating the door handle within the predetermined time, the first timer circuit 4
is activated, the interior light 10 is turned on when the door handle switch 14 is turned on, and its illuminance gradually decreases when the door handle switch 14 is turned off, and is finally turned off. Furthermore, the second
Since the timer circuit 12 turns off the normally open contact 13b of the relay 13 after the predetermined time has elapsed, the illuminance of the interior light 10 gradually decreases from that point on, and the interior light 10 is finally turned off.

Furthermore, when the movable contact 11a of the room lamp switch 11 is in conduction with the third fixed contact 11d, the interior light 10 will not turn on even if only the door switch 8 is turned on.

Incidentally, the presence or absence of the connection line L disposed between point b and the door switch 8 and via the seat switch 7 is determined as necessary.

Next, a second embodiment will be explained based on FIG.
The difference from the first embodiment is that the resistor R ₁₈ of the second timer circuit 12 is not connected to the door switch 8, but is connected to the positive terminal of the power supply 1 via the ignition switch 16 and the NOT circuit 17. , the connection line L via the seat switch 7 is not provided between point b and the door switch 8, and the other configurations are the same as in the first embodiment.

The operation of the second embodiment will be explained.

The interior light 10 lights up continuously when the movable contact 11a of the room lamp switch 11 is electrically connected to the first fixed contact 11b, and lights up only when the door switch 8 is turned on when the movable contact 11a of the room lamp switch 11 is electrically connected to the second fixed contact 11c.
When electrically connected to the third fixed contact 11d, the light goes out.

In addition, if the ignition switch 16 is turned ON once and then turned OFF again, in the first embodiment, the door switch 8 is turned ON once and then turned OFF again.
It operates in the same way as when

Again, the operation by operating the normally open contact 15 is the first
It is the same as the example.

Incidentally, in the second embodiment, the normally open contact 15 may be constituted by the door switch 8.

Further, in each of the above embodiments, the relay 13 of the second timer circuit 12 is connected to the door handle switch 1.
Any device that transmits or interrupts the contact signal from 4 may be used, and for example, a combination of semiconductors may be used.

Furthermore, in each of the above embodiments, the switch linked to the operation of the operating member disposed on the outer surface of the vehicle is
The switch is not limited to the door handle switch 14, but may be any switch that can be operated manually from outside the vehicle.

It has the above configuration and operation, and has the following effects.

In other words, a predetermined period of time is counted when the lighting switch is turned off, and within that predetermined period, the interior light is temporarily turned on from outside the vehicle only during the predetermined period of time by operating the switch in conjunction with the manual operation of an operating member located outside the vehicle. This makes it possible to easily inspect the interior of the vehicle even after the doors are locked in a dark place.

Furthermore, even if the door handle is tampered with after the time has elapsed by the second timer circuit, the interior light will not turn on, resulting in excellent effects such as being able to prevent power consumption.

[Brief explanation of the drawing]

1 to 3 show each embodiment of the vehicle interior light control device according to the present invention, FIG. 1 is a wiring diagram showing the first embodiment, and FIG. 2 explains the operation of FIG. 1. The waveform diagram and FIG. 3 are wiring diagrams showing the second embodiment. 2...Oscillation circuit, 4...First timer circuit, 7
...Seat switch, 8...Door switch, 9...
Drive circuit, 10... Indoor light, 11... Room lamp switch, 12... Second timer circuit, 14...
Door handle switch, 15... Normally open contact, 16
...Ignition switch, 17...Knot circuit.

Claims (1)

[Claims for Utility Model Registration] A door switch 8 that outputs an opening/closing signal in conjunction with the opening and closing of the door; a door handle switch 14 that outputs an operation signal in conjunction with the operation of the door handle; and the door handle switch 14 and the above. The timer is connected to the door switch 8 and starts operating a timer upon receiving a closing signal from the door switch 8 based on the closing of the door, and receives an operation signal from the door handle switch 14 based on the operation of the door handle within a predetermined time. a second timer circuit 12 that outputs a time limit signal when receiving the time limit signal; a first timer circuit 4 that outputs a lighting signal; an interior light 10 connected to the first timer circuit 4;
An interior light control device for a vehicle, characterized by comprising: