JP3023585B2 - Vehicle lamp system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp system for driving a relay in accordance with a switch operation of an operation switch unit disposed in a vehicle compartment to light a lamp disposed outside the vehicle compartment.

[0002]

2. Description of the Related Art Conventionally, there is an off-road lamp system as this kind of vehicle lamp system. This off-road lamp system is provided with a lamp outside the vehicle compartment (for example, on the ceiling) separately from the headlight, and this lamp (off-road lamp) is turned on as necessary according to a switch operation by an operation switch unit. Can be.

An operation switch unit is disposed in a vehicle interior. When an operation switch provided in the operation switch unit is turned on, a relay mounted on a substrate is driven in a relay unit mounted in an engine room. , The off-road lamp lights up. The relay unit includes a relay, a power supply circuit that generates a constant voltage by receiving a power supply voltage from a battery, a holding circuit that holds a switch mode that can be switched according to a switch operation by an operation switch unit, A relay drive circuit for driving a relay in accordance with the switch mode to be held is incorporated.

[0004]

However, according to such a conventional off-road lamp system, since the power supply circuit, the holding circuit, the relay driving circuit, and the like are built in the relay unit, it is possible to avoid an increase in the size of the relay unit. However, there is a problem that it is difficult to secure a mounting place.
In addition, since the relay unit is mounted in the engine room, the power supply circuit, the holding circuit, the relay drive circuit, and the like must be protected. In addition, since the constant voltage in the power supply circuit is created by using a Zener diode, this also causes a cost increase.

The present invention has been made to solve such problems, and an object of the present invention is to provide an inexpensive and easy-to-install lamp system for a vehicle.

[0006]

In order to achieve such an object, a first invention (an invention according to claim 1) is a vehicle lamp system as described above, wherein the operation switch unit includes a power supply voltage from a battery. A power supply circuit that generates a constant voltage by receiving a switch, a holding circuit that holds a switch mode that can be switched according to the switch operation, and a relay drive circuit that drives a relay according to the switch mode that the holding circuit holds It is something to do.

Further, the second invention (the invention according to claim 2)
According to the first aspect of the present invention, the constant voltage in the power supply circuit is generated by utilizing a voltage drop in a light emitting diode for display. Further, the third invention (the invention according to claim 3)
In the first invention, a transistor, a resistor connected between the collector and the base of the transistor, and N (N ≧ N) connected between a connection point of the resistor and the base of the transistor and an earth line 1) A power supply circuit is constituted by one display light emitting diode.

[0008]

According to the present invention, therefore, in the first invention,
By incorporating a power supply circuit, a holding circuit, and a relay drive circuit in the operation switch unit, a waterproof structure for these is not required. In addition, a relay unit can be used, and a waterproof type relay can be used. Further, in the second aspect, the constant voltage in the power supply circuit is created by utilizing the voltage drop in the light emitting diode for display. In the third invention,
A constant voltage is obtained between the emitter of the transistor and the ground line by utilizing the voltage drop in the light emitting diode for display.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments. FIG. 1 is a circuit configuration diagram of an off-road ramp system showing one embodiment of the present invention. In the figure, 1 is a vehicle battery, 2 is a light switch, 3 is a small lamp or clearance lamp, 4-1 and 4-2 are off-road lamps, and 5-1 and 5-2 are waterproof relays (coupler relays). , 6 are operation switch units, and 7-1 to 7-5 are connectors.

The light switch 2 and the operation switch unit 6 are arranged in the vehicle compartment, the battery 1 and the coupler relays 5-1 and 5-2 are arranged in the engine room, and the off-road lamps 4-1 and 4-2 are arranged in the vehicle. It is arranged outside the room (for example, on the ceiling). Off-road lamps 4-1 and 4-
2 is a main valve MB1, MB2, a sub-valve SB1,
SB2 is provided.

The operation switch unit 6 includes a battery 1
A power supply circuit 6-1 for generating a constant voltage (7V) by receiving a power supply voltage from the power supply circuit, a holding circuit 6-2 for holding a switch mode switched in accordance with the operation of the power switch SW1 and the mode switch SW2, and Holding circuit 6-2
Relays 5-1 and 5-1 according to the switch mode
And a relay drive circuit 6-3 for driving the relay 5-2. In this embodiment, as the power switch SW1 and the mode switch SW2, a momentary switch having no holding function in the switch itself is used. That is, the power switch SW1 and the mode switch SW2
Is turned on only when pressed, and is kept off when not pressed. By using such a momentary switch, the operation switch unit 6 can be made thinner and the operation feeling can be improved as compared with a switch using a switch having a holding function.

The power supply circuit 6-1 includes a diode D1, capacitors C1 to C4, resistors R1 to R3, an NPN transistor Q1, and light emitting diodes (LEDs) DL1 to DL.
L4. In the power supply circuit 6-1, the resistor R2 is connected between the collector and the base of the transistor Q1, and the LEDs DL1 to DL4 are connected in series between the connection point between the resistor R2 and the base of the transistor Q1 and the ground line. It is connected. The LEDs DL1 and DL2 are used for backlighting the operation section of the power switch SW1, and the LEDs DL3 and DL4 are used for the mode switch SW2.
(See FIG. 2).

The holding circuit 6-2 includes diodes D2 to D4.
, Capacitors C5 to C9, resistors R4 to R12, and integrated circuits (ICs) A and B. The relay drive circuit 6-3 includes PNP transistors Q2 and Q3, NPN transistors Q4 and Q5, resistors R13 to R20, and LE
D · DL5, DL6 and Zener diodes ZD1, ZD
D2. LED DL5 is used for displaying the sub-bulb lighting of the off-road lamps 4-1 and 4-2.
D · DL6 is provided for displaying the main bulb lighting of the off-road lamps 4-1 and 4-2 (see FIG. 2).

Next, the operation of the off-road ramp system configured as described above will be described with reference to FIG. In FIG. 1, when the light switch 2 is turned on,
The small lamp or the clearance lamp 3 is turned on, and the power supply voltage from the battery 1 is supplied to the power supply circuit 6-1 of the operation switch unit 6. Thereby, LE
A current flows through D • DL1 to DL4, and LED • DL1 to
L4 emits light, and the operation units of the power switches SW1 and SW2 are backlit.

Further, a stable voltage (7.6 V) is applied to the base of the transistor Q1 due to the voltage drop at the LEDs DL1 to DL4, and a constant voltage (7V) is applied between the emitter of the transistor Q1 and the ground line. Occurs. That is, the voltage drop at the LEDs DL1 to DL4 is constant (1.9 V) irrespective of the fluctuation of the power supply voltage, whereby a stable voltage (7.6 V) is applied to the base of the transistor Q1. Due to the stable voltage applied to the base, a constant voltage (7 V) is generated between the emitter of the transistor Q1 used in the unsaturated region and the ground line.

Upon receiving a constant voltage from the power supply circuit 6-1, "CK" of IC.A and IC.B of the holding circuit 6-2,
The levels of the terminals “D”, “S”, “R”, “Q”, and “Q bar” are as shown in the operation mode shown in FIG. In the ICs A and B, “CK” is a clock input terminal, “D” is a data input terminal, “S” is a set terminal, “R” is a reset terminal, “Q” and “Q bar” are Output terminal. The “R” terminal of IC · A is at “H” level immediately after the light switch is turned on, but as the capacitor C9 is charged, the level drops to “L” level.
In this operation mode, transistors Q2 and Q3 of relay drive circuit 6-3 maintain the off state.

In this state, when the power switch SW1 is turned on, the level of each terminal of IC A, IC B becomes the operation mode shown in FIG. As a result, the transistor Q2 of the relay drive circuit 6-3 is turned on, and LE
D · DL5 is turned on, and the transistor Q4 is turned on. When the transistor Q4 is turned on, a current flows through the coil CL2 of the coupler relay 5-2, and the normally open contact S2 is turned on.
The second sub-valves SB1 and SB2 are turned on. The state in which the power switch SW1 is turned on, that is, the switch mode in which the power switch SW1 is turned on to switch from the standby mode to the sub-lighting mode, is held by the holding circuit 6-2.

Next, in this state, the mode switch SW2
Is turned on, the level of each terminal of IC-A and IC-B is in the operation mode shown in FIG. As a result, the transistor Q3 of the relay drive circuit 6-3 is turned on, the LED DL6 is turned on, and the transistor Q5 is turned on. When the transistor Q5 is turned on, a current flows through the coil CL1 of the coupler relay 5-1, the normally open contact S1 is turned on, and the main valves MB1 and MB2 of the off-road lamps 4-1 and 4-2 are turned on.

In this case, the transistor Q2 of the relay drive circuit 6-3 is turned off, the LED DL5 is turned off, and the sub-valves SB1 and SB2 are turned off. The state in which the mode switch SW2 is turned on, that is, the switch mode in which the mode switch SW2 is turned on to switch from the sub-lighting mode to the main lighting mode, is held by the holding circuit 6-2.

Next, in this state, the mode switch SW2
Is turned on, the level of each terminal of IC A and IC B becomes as shown in the operation mode shown in FIG. This turns on the transistor Q2 of the relay drive circuit 6-3,
Q4 is turned off, LED DL5 lights up, LED
DL6 is turned off, and transistor Q4 is turned on.
5 is turned off. By turning on the transistor Q4,
The sub-valves SB1 and SB2 light up, and the transistor Q5
Turns off the main valves MB1 and MB2. The state in which the mode switch SW2 is turned on, that is, the switch mode in which the mode switch SW2 is turned on and the mode is switched from the main lighting mode to the sub lighting mode is held by the holding circuit 6-2.

Next, in this state, the mode switch SW2
Is turned on, the level of each terminal of IC-A and IC-B is in the operation mode shown in FIG. This turns off the transistor Q2 of the relay drive circuit 6-3,
Q3 is turned on, LED DL5 turns off, LED
DL6 is turned on, sub-valves SB1 and SB2 are turned off, and main valves MB1 and MB2 are turned on. Hereinafter, similarly, each time the mode switch SW2 is turned on, the switch mode is switched from the main lighting mode to the sub lighting mode and from the sub lighting mode to the main lighting mode.

When the power switch SW1 is turned on in a state where the main valves MB1 and MB2 are turned on, that is, in a state where the switch mode is set to the main lighting mode, the level of each terminal of the ICs A and B is turned on. Are in the operation mode shown in FIG. As a result, the transistor Q3 is turned off, the LED DL6 is turned off, the main valves MB1 and MB2 are turned off, and the switch mode returns to the standby mode.

When the power switch SW1 is turned on in a state where the sub-valves SB1 and SB2 are lit, that is, in a state where the switch mode is set to the sub-lighting mode, the level of each terminal of IC.A and IC.B becomes , The operation mode shown in FIG. As a result, the transistor Q2 is turned off, the LED DL5 is turned off, the sub-valves SB1 and SB2 are turned off, and the switch mode returns to the standby mode.

As is clear from the above description, according to the present embodiment, the operation switch unit 6 is connected to the power supply circuits 6-1 and 6-1.
Since the holding circuit 6-2 and the relay driving circuit 6-3 are built in, a waterproof structure for them is not required, and an inexpensive system can be provided. In addition, the relay unit is eliminated and the waterproof type coupler relays 5-1 and 5-2 are provided.
, The system can be easily installed.

Further, according to the present embodiment, the power supply circuit 6-1
LED for display constant voltage (7V) at
In this case, a Zener diode is unnecessary, the number of components is reduced, and the cost is reduced. That is, when the conventional method is adopted, the power supply circuit 6-1 has a circuit configuration as shown in FIG. In this case, a Zener diode ZD3 and resistors R21 and R22 are required. On the other hand, according to the present embodiment, the Zener diode ZD
3 and the resistors R21 and R22 can be reduced.

In this embodiment, the mode switch SW2 is provided to switch the switch mode from the main lighting mode to the sub lighting mode and from the sub lighting mode to the main lighting mode. The same can be applied to a type provided with only That is, the present invention can be similarly applied to an off-road lamp having no sub-bulb and main bulb, but simply turning on or off.

[0027]

As is apparent from the above description, according to the present invention, in the first invention, a power supply circuit, a holding circuit, and a relay drive circuit are built in the operation switch unit, so that a waterproof structure for these is not required. In addition, a waterproof type relay can be used without the relay unit, so that a low-cost and easy-to-install system can be provided. According to the second and third aspects of the present invention, the constant voltage in the power supply circuit is generated by utilizing the voltage drop in the light emitting diode for display, so that a zener diode can be eliminated, and the number of parts can be reduced. It can be cheaper.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an off-road ramp system showing one embodiment of the present invention.

FIG. 2 is a front view of an operation switch unit used in the off-road lamp system.

FIG. 3 is a diagram for explaining a lighting state of an off-road lamp in response to a switch operation of the operation switch unit.

FIG. 4 is a circuit diagram showing a main part of a power supply circuit when a conventional method is adopted.

[Explanation of symbols]

1 ... Battery, 2 ... Light switch, 4-1 and 4-2 ...
Off-road lamps, 5-1 and 5-2 ... coupler relays, 6
... operation switch unit, 6-1 ... power supply circuit, 6-2 ...
Holding circuit, 6-3 relay drive circuit, R1, R2 resistor, Q1 transistor, DL1 to DL4 light emitting diode (LED).

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-29530 (JP, A) JP-A-4-287729 (JP, A) Real-life opening 55-68657 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B60Q 1/00 B60Q 1/14 B60R 16/02 645 H05B 37/02

Claims (3)

(57) [Claims] 1. A vehicular lamp system for driving a relay in response to a switch operation of an operation switch unit disposed in a vehicle compartment to light a lamp disposed outside the vehicle compartment, wherein the operation switch unit includes A power supply circuit that receives a supply of a power supply voltage to generate a constant voltage; a holding circuit that holds a switch mode that can be switched according to the switch operation; and a relay drive that drives the relay according to the switch mode that the holding circuit holds. A lamp system for a vehicle, comprising: a circuit; 2. The vehicular lamp system according to claim 1, wherein the power supply circuit generates a constant voltage using a voltage drop in a light emitting diode for display. 3. The power supply circuit according to claim 1, wherein the power supply circuit includes a transistor, a resistor connected between the collector and the base of the transistor, and a connection point between the resistor and the base of the transistor and an earth line. N connected to
A vehicle lamp system comprising (N ≧ 1) display light emitting diodes.