JPS61249848A - Vehicle illuminating device - Google Patents

Abstract

PURPOSE:To prevent a battery from being wastefully used during any one of doors being left to be opened, by providing such an arrangement that courtesy lamps are turned on only when a room switch is set at a position where the switch is associated with the doors. CONSTITUTION:A room light RL is connected to an illumination control means 1 through a room light switch RS having three positions, normal turn-on position, normal turn-off position and position where the room light is turned on when any one of doors is opened. The illumination control means 1 detects the position where the doors are associated, and turns on courtesy lamps CL1 through CL4 attached to the door sections only when the it is in the door associating position. Accordingly, even is any one of the door is opened, the courtesy lamps CL1 through CL4 are turned off if the room light switch RS is set to its turned off position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vehicle lighting device equipped with a room light and a courtesy light.

(Prior Art) Generally, vehicles such as automobiles are equipped with a room light for illuminating the interior of the vehicle.
Control is possible in at least three states: (2) always on, (2) always off, and (3) lighting linked to door opening/closing.

On the other hand, among the above-mentioned automobiles, the higher-priced so-called luxury cars are equipped with a courtesy light in addition to the room light in the door section to illuminate the area underfoot when getting in and out of the vehicle. This courtesy light is normally turned on or off in conjunction with the opening and closing of the door, and therefore, when the door is open, it remains lit regardless of the presence or absence of passengers getting on or off the vehicle. becomes. Therefore, even if the door is left open for a long period of time for reasons other than getting on and off the vehicle, the courtesy light remains on unnecessarily, and battery power is wasted. In particular, since the courtesy light lamp is provided for each door of a four-door type, the power consumption is greater than that of a room light.

Therefore, conventionally, an operation switch is provided in the armrest of the door to set the lighting state of the courtesy light in the same way as the lighting state of the room light in (1) to (3) above, so that the light can be turned off when not needed. (For example, see Japanese Utility Model Application No. 59-83641).

In this way, if a dedicated control switch is provided for the courtesy light as well as for the room light, it is possible to reliably prevent battery power from being wasted when the door is opened other than when getting on or off the vehicle.

However, on the other hand, since a dedicated switch is installed separately,
A new switch is required, and the number of wires such as a wire harness increases, and the number of man-hours for connecting the wires increases, resulting in a new problem that increases costs.

(Objective of the Invention) The present invention has been made in order to improve the above-mentioned problem, and is capable of preventing the above-mentioned unnecessary consumption of power supply current without adding a special switch or increasing the number of wires. The object of the present invention is to provide a vehicle illumination device that achieves the following.

(Means for Achieving the Object) In order to achieve the above object, the vehicle lighting device of the present invention includes a room light provided on the ceiling of the vehicle interior, a courtesy light provided on the vehicle door, and the room light. There are three switching contacts: an on position where the room light is always on, an off position where the room light is always off, and a door linked lighting position where the room light is linked to the opening and closing of the vehicle door and turns on when the door is opened. and lighting state control means that detects the door-linked lighting position of the room light switch and turns on the courtesy light when the room light switch is in the door-linked lighting position. It is something.

(Function) According to the above method, the door interlocking lighting position of the room light switch is detected and the courtesy light is turned on only when this detection occurs, so the courtesy light is ultimately controlled by operating the room light switch. becomes possible.

Therefore, even if the door is kept open, the room light can be turned off by setting the room light switch to the off position, thereby preventing unnecessary consumption of power supply current as in the prior art.

Furthermore, since the room light switch can also control the curtain lights, there is no need for an increase in switches or wiring (wire harness) compared to when an independent operation switch is installed, which reduces man-hours and costs. do not have.

(Embodiment) First, FIGS. 1 and 2 show a vehicle lighting device according to a first embodiment of the present invention.

In FIG. 1, the symbol RL is a room light for illuminating the interior of the vehicle, which is installed on the ceiling of the interior of the vehicle.
This room light RL is connected at one end to a battery power supply via a power supply fuse F, and at the other end to a lighting state control means l via a room light switch R9. The room light switch RS has a switching contact a corresponding to an on position that keeps the room light RL always on, a switching contact b corresponding to an off position that keeps the room light RL always off, and a switching contact b that corresponds to an off position that keeps the room light RL always on. It has three switching contacts, a switching contact C corresponding to a door interlocking lighting position that is linked to opening and closing and turns on when the door is opened, so that the room light RL is turned on in any of the states a' to c. It has become.

Further, symbols CL and ~CL are curtain lights installed at each door of a car to illuminate the feet of passengers when getting on and off.One end is connected to the battery power source via the power fuse F, and the other end is are connected to the lighting state control means 1, respectively.

On the other hand, the lighting state control means 1 is centered on a CPU 2 constituted by a microcomputer, for example.
The input side of PU2 is connected to lighting switches DS, -DS4 which are connected to the opening and closing of the door, and the output side is connected to a transistor Q.

On the other hand, the collector of the transistor Q1 is connected to the room light switch R via a backflow prevention diode D.
It is connected to the switching contact C corresponding to the door interlocking position No. 9, and also to the ground side terminal of the courtesy lights OL and -CL4, respectively.

Further, the symbol R3 indicates the switching contact C and the transistor Q1.
This is a resistor for detecting the potential at point A1 of the wiring A connecting the lines A, in other words, the collector potential of the transistor Q1, and is provided between the point A1 and the input terminal of the CPU 2.

When any of the doors is opened, the lighting switches DS, ~DS, corresponding to the door are closed, and the CPU 2 accordingly makes the transistor Q1 conductive, so that the room light RL and the courtesy light CL, ~
CL lights up. In this case, the transistor Q1
Afterglow control when the lights are turned off is possible by changing the potential from a conductive state to a non-conductive state.

Now, for example, if the room light switch RS is in the on position where the room light RL is always on,
The room light RL is turned on, but the above switching contact C
Since it will be open, the potential at point A1 can be considered to be the ground potential. Therefore, CPU2 resistor R1
This potential is detected through the controller, and it is determined that this state means that the room light switch R3 is not in the door interlocking position, and a predetermined detection signal is generated. This predetermined detection signal is
It is formed by H and L level signals at a predetermined sampling period. When it is determined from this detection signal that the room light switch R9 is not in the door interlocking position, the transistor Q1 becomes an OFF bias, and the room light RL and the courtesy lights CL, -CL,
cannot be lit. Also, the above room light switch RS
However, even when the room light RL is in the OFF position where it is always turned off, the potential at the point A1 becomes the ground potential, so the same operation as above occurs.

On the other hand, when the room light switch RS is in the door interlocking position (switching contact C) linked to the opening and closing of the door, the potential at point A changes to the power supply potential (+
2V), this potential is also applied to the collector of the transistor Q1, and its state is detected by the CPU2, and the transistor Q becomes ON bias and conductive, and the lighting switches DS, ~DS4 Depending on the ON state (door opening/closing), the room light RL and the corresponding courtesy lights CL and -CL4 are turned on.

Therefore, the courtesy lights CL and -CL are ultimately controlled by the room light switch r (S), and they only need to be connected to the collector side of the transistor Q1 for driving the room light, and no special wiring is required. No. The above operation is shown in a time chart as shown in Fig. 2.

Next, Fig. 3 shows that when the door is interlocked, the room light r
(In the second embodiment of the present invention, the driving transistors for lighting the room light RL and the courtesy lights CL, ~CL are provided separately for each of the room light RL and the courtesy lights CL, ~CL). This figure shows such a vehicle lighting device.

With such a configuration, the diode D described above.

In addition, since the current value flowing through the driving transistor Q1 can be reduced, the capacitance value of the transistor can also be reduced, and afterglow control becomes easier.

Furthermore, FIGS. 4 and 5 show that, for the configuration shown in FIG. 1, a high resistance nt (IOK ), set the value of the resistor R1 for detecting the potential at point A8 to the same value, and then
This shows a vehicle lighting device according to a third embodiment of the present invention in which the potential detection level is divided and set in three positions. Therefore, in this embodiment, different reference setting levels are set on the input side of the CPU 2. Two comparators 3 and 4 are provided with V, , V, respectively.

That is, in this configuration, if the power supply potential is 12 (V),
(1) In the door interlocking position where the room light switch RS is at the switching contact C position, the potential at point A8 is 12 (V), and (2) On when the room light switch I' (S is at the switching contact a position) In the off position, the potential at point A1 is the ground potential, and (3) in the off position, where room light switch R9 is at the switching contact position, the potential at point A1 becomes 6 (V) as it is divided by the resistors R3 and Rt. .

On the other hand, the reference setting levels V , , V , are set, for example, V,=3 (V), V,=9 (V) l: By setting the reference setting levels V 1 , , V , respectively, the CPU 2 uses the comparator 3.4.
The above three positions (1) to (3) can be detected from the output value of
The room light RL and the courtesy light CL are controlled by controlling the transistor Q as in the embodiment of
~CL, are controlled to be lit.

Moreover, in this case, since the transistor Q can be controlled according to the above three positions, the courtesy lights OL r to CL can be turned on not only when the room light switch R9 is linked to the door but also when the room light switch R9 is in the on position. become able to. The above operation is shown in a time chart as shown in FIG.

(Effects of the Invention) As explained above, the vehicle lighting device of the present invention includes a room light provided on the ceiling of the vehicle interior, a courtesy light provided on the vehicle door, and the room light that is always turned on. A room light switch having three switching contacts: an on position, an off position where the room light is always turned off, and a door linked lighting position where the room light is linked to the opening and closing of the vehicle door and turned on when the door is opened; The lighting state control means detects the door interlocking lighting position of the room light switch and turns on the courtesy light when the room light switch is in the door interlocking lighting position.

Therefore, according to the present invention, since the door-linked lighting position of the room light switch is detected and the courtesy light is turned on at the time of detection, the courtesy light can be controlled by operating the room light switch. .

Therefore, even if the door is kept open, the room light can be turned off by setting the room light switch to the off position, thereby preventing unnecessary consumption of power supply current as in the prior art.

Moreover, since the courtesy light can also be controlled by the room light switch, there is no need for an increase in switches or wiring (wire harness) compared to when an independent operation switch is installed, which also increases man-hours and costs. do not have.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a vehicle lighting device according to a first embodiment of the present invention, FIG. 2 is a time chart showing its circuit operation, and FIG. 3 is a diagram of a vehicle lighting device according to a second embodiment of the present invention. FIG. 4 is an electric circuit diagram of a vehicle lighting device according to a third embodiment of the present invention, and FIG. 5 is a time chart showing the circuit operation thereof. l...Lighting state control means 2...CPU RL...Room light RS...Room light switch CL, ~CL,...Courtesy light DS, ~DS,... ...Lighting switch R1...Resistor Ql...Transistor a''-'c...Switching contact Application Person Mazda Co., Ltd.

Claims (1)

[Claims] 1. A room light provided on the ceiling of the vehicle interior, a courtesy light provided on the vehicle door, an on position where the room light is always on, an off position where the room light is always off, and the room light. A room light switch having three switching contacts for a door-linked lighting position that is linked to the opening and closing of the vehicle door and turned on when the door is opened, and a room light switch that detects the door-linked lighting position of the room light switch and turns on when the door is opened A lighting state control means for lighting the courtesy light when the courtesy light is in a door interlocking lighting position.