JPH0366168B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cornering lamp control device for a vehicle that illuminates the direction in which the vehicle is traveling when turning right or left when driving at night.

Conventional vehicle cornering lamp control devices control the turning on and off of cornering lamps in correspondence only with the steering direction of the steering wheel.

Therefore, even when the vehicle is stopped, the cornering lamps are turned on simply by steering the steering wheel, and there is a drawback that the cornering lamps are turned on even when there is no need to turn them on, such as when the vehicle is put in a garage. Ta.

The present invention was invented in view of the above-mentioned problems, and its purpose is to provide a corner lamp for a vehicle that turns on the cornering lamp when the direction indicator switch is turned on to the right turn direction or left turn direction and the vehicle starts traveling on a curve. The purpose is to provide a control device.

A preferred embodiment of the vehicle cornering lamp control device of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, 1 is a left turn direction indicator light, and 2 is a right turn direction indicator light. Reference numeral 3 denotes a direction indicating switch, which is composed of a movable contact 3a, a left-turn fixed contact 3b, and a right-turn fixed contact 3c. 4 is a hazard switch; 5 is a flasher unit that outputs a blinking signal to make the direction indicator lights 1 and 2 blink at a predetermined period;
6 is a DC power supply, and 7 is a lighting switch. Reference numeral 8 denotes a curved running detection unit that detects the point in time when the vehicle switches from a straight running state to a curved running state and outputs a detection signal. This is the configuration for detection. Curve travel detection section 8
8a is a rotary disk that rotates in conjunction with the rotation of the steering handle, and has a substantially fan-shaped planar shape as shown in FIG. D is a light emitting diode, the anode of which is connected to the positive pole of the DC power supply 6 via the resistor _R1 and the lighting switch 7, and the cathode of which is grounded. Tr is a phototransistor, the collector of which is connected to the positive pole of the DC power supply 6 via the lighting switch 7,
The emitter is grounded through resistor _R2 . The light-emitting diode D and the phototransistor Tr face each other via a rotary disk 8a, and when the rotary disk 8a rotates and changes position, the shielding between them is released and the light emission of the light-emitting diode D is interrupted. Transmission and reception are performed. Light emitting diode D and phototransistor
Tr is on a reference line A extending from the axis 8b shown in FIG. 2 when the vehicle is running straight. Note that even when the vehicle is traveling straight, the steering angle of the steering wheel changes somewhat depending on the condition of the road. On the other hand, the rotary disk 8a is formed at a wide angle of a predetermined angle r in both rotational directions from the reference line A so that the light emitting diode D and the phototransistor Tr do not transmit and receive the light emission even if there is a change of the above degree. are doing. 9 is for left turn, 10
are each cornering ramp for right turns.

Reference numeral 11 denotes a lamp control section which, when inputting the ON signal of the lighting switch 7, receives both the flashing signal of the flasher unit 5 when switching the direction indicator switch 3 and the detection signal of the curve running detection section 8. However, it has a function of lighting the cornering lamps 9 and 10 corresponding to the switching operation direction of the direction indicating switch 3. The lamp control section 11 includes a flasher signal discrimination circuit 12,
Running state signal holding circuit 13 and output control circuit 14
It consists of

The flasher signal discrimination circuit 12 detects the flashing signal from the flasher unit 5 as the left and right direction indicator lights 1 and 2.
It has a function of determining which one or both of them are blinking and outputting the result, and is composed of note circuits 12a and 12b, AND circuits 12c and 12d, and integration circuits 12e and 12f. The first AND circuit 12c and the direction indicating switch 3
One input side of the AND circuit 12c is connected to the left-turn side fixed contact 3b, and the other input side is connected to the right-turn side fixed contact 3c via the first knot circuit 12a. Further, in the second AND circuit 12d, one input side of the second AND circuit 12d and the direction switch 3 is connected to the right turn fixed contact 3c, and the other input side is fixed to the left turn side via the second knot circuit 12b. It is connected to contact 3b. The output side of the first AND circuit 12c is connected to one input side of a first NAND circuit 14a, which will be described later, via a first integration circuit 12e. In addition, the second AND circuit 12d
The output side is connected to one input side of a second NAND circuit, which will be described later, via a second integrating circuit 12f.
The traveling state signal holding circuit 13 is connected to the curve traveling detecting section 8.
It has a function of holding the detection signal from the output control circuit 14 until the output signal from the output control circuit 14 changes, and is composed of differentiating circuits 13a, 13b, 13c, a flip-flop circuit 13d, and a resistor _R3 . The flip-flop circuit 13d has a reset input side connected to a phototransistor Tr, which is a detection signal output portion in the curve traveling detection section 8 via the first differentiation circuit 13a.
The set input side is connected to the output side of the first NAND circuit 14a via the second differential circuit 13b and the output side of the second NAND circuit 14b via the third differentiator circuit 13c, and the reset output The one side is connected to the other input side of the NAND circuits 14a and 14b. The resistor _R3 is a resistor forming a discharge circuit of the two differentiating circuits 13b and 13c. The output control circuit 14 is a lighting switch 7
When the ON signal is input, if both the discrimination signal from the flash signal discrimination circuit 12 and the detection signal from the driving state signal holding circuit 13 are input, either the left or right cornering lamp 9, 10 corresponding to the discrimination signal is NAND circuits 14a, 1
Consists of 4b. The NAND circuits 14a and 14b have respective coils 15a and 15a of the relays 15 and 16 on their output sides, respectively.
16a, and are connected to the positive electrode of the DC power supply 6, respectively. In each relay 15, 16, normally open contacts 15b, 16b, which turn on when the coils 15a, 16a are energized, have one end connected to the positive pole of the DC power supply 6, and the other end grounded via the cornering lamps 9, 10. .

Next, we will explain the effect of the above configuration by plotting the horizontal axis of Fig. 3 as time T.
The explanation will be based on a time chart (seconds).
At night, etc., turn on lighting switch 7.
When turned ON, the light emitting diode D of the curve traveling detection section 8 starts emitting light. However, since the vehicle is running straight at that time, the light emitting diode D and the phototransistor Tr are near the reference line A in FIG. 2, and the phototransistor Tr does not sense the light emission.

Now, in order to make a left turn, the movable contact 3a of the direction indicator switch 3 is turned on with the left turn fixed contact 3b, and the left turn direction indicator light 1 is made to blink at the flashing cycle of the flasher unit 5. Then, the first AND circuit 12
c alternately outputs a high level signal and a low level signal at the above blinking period. At this time, the first integrating circuit 12e
As shown in Fig. 3, a pulse signal of Vi potential based on the flashing cycle of the flasher unit 5 is input,
Outputs an integral waveform up to the Vo potential. Since this integral waveform is set to a charging/discharging time constant that does not allow complete discharge during the blinking period, it becomes a waveform that repeats at a predetermined reference potential Vh or higher. This reference potential Vh is a discrimination signal to the control output section 14, that is, a high level signal.

Thereafter, when the steering wheel is steered to cause the vehicle to travel around a curve, the turntable 8a in the curve travel detecting section 8 rotates by an angle r or more shown in FIG. The phototransistor Tr senses the light emitted from the light emitting diode D, and outputs a high level signal as a detection signal from its emitter.

Initially, the reset output of the flip-flop circuit 13d was at a low level (L level), but when a one-pulse high level (H level) signal is reset and inputted via the first component circuit 13a, the reset output becomes a high level (H level) signal. Outputs a reset.

Since both inputs of the first NAND circuit 14a are at high level, the first NAND circuit 14a outputs a low level (L level) signal to excite the coil 15a of the first relay 15 and turn on the left turn cornering lamp 9. .

When the left turn is completed and the movable contact 3a of the direction indicator switch 3 returns to the neutral position shown in FIG. 1, the left turn direction indicator light 1 is turned off. Further, the first AND circuit 12c returns to a low level output. Then, the first
Discharging progresses in the integrating circuit 12e, and the output side potential finally falls below the reference potential Vh.

Since one of the inputs of the first NAND circuit 14a is at a low level, it is inverted and becomes a high level output, and the relay 15 is reset to turn off the left turn cornering lamp 9, and the output is output via the second signal distribution circuit 13b. A high level signal of one pulse is outputted to the flip-flop circuit 13d as a set input. Therefore, the flip-flop circuit 13d returns to its original signal form.

Note that even when the direction indicating switch 3 is operated to turn right, the right-turn cornering lamp 10 can be controlled in the same manner as when the left turn is operated.

Furthermore, when the hazard switch 4 is turned on, both the left and right direction indicator lights 1 and 2 blink, and the AND circuits 12c and 12d connect the output of the low level signal, so each cornering lamp 9, 10 does not light up.

In this embodiment, the lighting switch 7
is a configuration connected to the curve traveling detection section 8,
The lamp control section 11 controls the lighting switch 7.
It is sufficient that the cornering lamp is controlled to turn on and off based on the operation of the direction indicator switch 3 and the detection signal from the curve detection section 8 only when the cornering lamp is turned ON.

Since the vehicle cornering lamp control device according to the present invention has the above-described configuration and operation, it produces the following effects.

Since the cornering lamp is turned on when the direction indicating switch is operated and the vehicle starts traveling on a curve, there is no need to turn on the cornering lamp when it is not necessary to turn on the cornering lamp. For example, when changing lanes or parking or parking, the cornering lamps will not turn on simply by operating the direction switch, which has the effect of preventing unnecessary power consumption.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing one embodiment of a vehicle cornering lamp control device according to the present invention, and FIG.
This figure is a plan view of the rotary disk in FIG. 1, and FIG. 3 is a time chart of the configuration shown in FIG. 1. 1, 2... Direction indicator light, 3... Direction indicator switch, 5... Flasher unit, 7... Lighting switch, 8... Curve travel detection unit, 9, 1
0...Cornering lamp, 11...Lamp control unit, 12...Flash signal discrimination circuit, 13...
... Running status signal holding circuit, 14... Output control circuit.

Claims (1)

[Scope of Claims] 1. A flasher unit that outputs a blinking signal to blink a right/left turn direction indicator at a predetermined period based on a switching operation of a direction indicator switch; a curve traveling detection section that detects the point in time when the vehicle has reached a corner and outputs a detection signal; A cornering lamp control device for a vehicle, comprising a lamp control unit that turns on a cornering lamp on the side corresponding to the switching operation direction of the direction indicator switch only when both detection signals are input.