JPH0516042Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to an improvement of a direction indicator light operation confirmation device that confirms the operation of a vehicle's direction indicator lights by a blowing sound, and in particular, prevents forgetting to turn off the direction indicator lights. The present invention relates to a direction indicator light operation confirmation device that facilitates confirmation of blowing noise. Furthermore, this invention belongs to a field of application characterized in that it is provided with an opening/closing circuit for reducing the sound of an audio device when the direction indicator lamp is activated for a predetermined period of time.

BACKGROUND ART A conventional direction indicator light operation confirmation device is disclosed in Japanese Utility Model Application Publication No. 119438/1983. According to the related art, a melody generating circuit is provided and the operation of the direction indicator light (flasher) can be confirmed by the melody sound.

Problems to be Solved by the Invention However, according to the above-mentioned conventional technology, when a passenger is operating an audio device or in an environment with intense noise outside the vehicle, the melody sound activates the turn signal light. In some cases, it was difficult to confirm. Furthermore, even if the sound pressure is set high enough to make the melody sound audible in a noisy environment, the melody sound becomes too high when the inside of the car is quiet.

Means for Solving the Problems This invention was devised to address the above-mentioned problems, and includes a direction indicator switch for switching left and right direction indicator lights, and a direction indicator switch for changing the left and right direction indicator lights. A turn signal light operation confirmation device equipped with a turn signal sounding device, characterized in that an opening/closing circuit for reducing the sound of an audio device when the direction signal light is activated for a predetermined period of time is connected to the audio device. The purpose is to provide a verification device.

Function: The direction indicator light starts blinking when the direction indicator switch is operated to either the right turn side or the left turn side.

At the same time, the sounding device emits a blowing sound in response to the blinking operation of the direction indicator light.

The opening/closing circuit acts on the audio device when the direction indicator light is activated for a predetermined period of time, and reduces the sound emitted from the audio device.

Thus, even in noisy conditions, it is possible to confirm the operation of the direction indicator light over time and to prevent forgetting to return the direction indicator switch.

Embodiment FIG. 1 is an electrical circuit diagram showing a preferred embodiment of this invention, and the configuration will be explained.

In Fig. 1, 1 is a direction indicator switch, 2 is a direction indicator light, 3 is a sound generating device, 4 is a variable sound pressure circuit,
5 is an opening/closing circuit, 6 is a drive circuit, 7 is an audio device, 8 is a microcomputer (hereinafter simply referred to as "microcomputer"), 9 is a DC power supply, and 10 is an ignition switch.

Furthermore, details of each of the above configurations will be explained.

The direction indicating switch 1 has a right side fixed contact 1a connected to an input section 8a of a microcomputer 8, and an input section 8b.
This is a manually operated switch that has a left fixed contact 1b connected to the left side, an electrically neutral neutral fixed contact 1c, and a grounded movable contact 1d.

Further, the direction indicator light 2 is composed of right and left direction indicator lights 21 and 22.

Further, the sounding device 3 includes a piezoelectric buzzer 31, inverters 32, 33, resistors 34, 35, and a capacitor 3.
6, and the sound pressure emitted from the piezoelectric buzzer 31 changes depending on the voltage level of the power supply terminal 3a.

The sound pressure variable circuit 4 is composed of resistors 41 to 44, capacitors 45 and 46, and diodes 47 and 48, and is configured to adjust the frequency value of the signal input from the output section 8c of the microcomputer 8 to the input terminal 4c. This circuit has a so-called F-V (frequency-voltage) conversion function that varies the voltage level output to the output terminal 4b according to the voltage.

To describe the variable sound pressure circuit 4 in detail, the variable sound pressure circuit 4 includes a differential circuit section composed of resistors 43, 44, a capacitor 46, and diodes 47, 48, and resistors 41, 42, and a capacitor 45.
This circuit is a circuit that is combined with an integrating circuit configured by , and by this combination circuit, the signal input to the input terminal 4a is not affected by the duty ratio of the oscillation signal output from the microcomputer 8, which will be described later. A voltage proportional only to the frequency of can be outputted to the output terminal 4b.

Moreover, the switching circuit 5 includes a resistor 51 and a transistor 5.
2, a first relay coil 53, and a first relay contact 54.

The opening/closing circuit 5 is activated by a "0" level signal output from the output section 8d of the microcomputer 8, opens the first relay contact 54, and mutes or reduces the sound of the audio device 7 in the subsequent stage. . Here, the "0" level signal is a signal output by the microcomputer 8 when the movable contact 1d of the direction indicator switch 1 is switched to either the right or left fixed contact 1a or 1b for a predetermined period of time. .

Further, the drive circuit 6 includes resistors 61 and 62, transistors 63 and 64, a second relay coil 65, a third relay coil 66, a second relay contact 67, a third relay contact 68, and a current detection resistor 69. At the same time, when the movable contact piece 1d of the direction indicator switch 1 is closed to the right fixed contact 1a, the right direction indicator light 21 is driven to blink by the blinking signal outputted by the output section 8e of the microcomputer 8, and in the same manner. This circuit drives the left direction indicator light 22 to blink in response to a blink signal outputted from the output section 8g of the microcomputer 8 when the left fixed contact 1b is closed. The current detection resistor 69 connected to the input section 8f of the microcomputer 8 has a low resistance of, for example, about 100 mΩ, which detects the disconnection and short circuit state of the right or left direction indicator light 21 or 22, and the microcomputer 8 detects this current. The voltage drop value caused by the detection resistor 69 is detected, and the second
Alternatively, the opening/closing period of the third relay contact 67 or 68 is controlled to be short, and the opening/closing period of the third relay contact 67 or 68 is kept open in the event of a short circuit.

That is, if the right direction indicator light 21 or the left direction indicator light 22 is disconnected, the remaining direction indicator lights can be caused to blink at short intervals. Also, indicator lights 21, 2
2, the indicator lights 21 and 22 remain off.

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

For example, when an occupant touches the movable contact piece 1d of the direction indicator switch 1 to the right fixed contact 1a or the left fixed contact 1b when turning right or left at an intersection or changing lanes, the direction indicator light 2
The flashing is controlled by the microcomputer 8 and the drive circuit 6.

The microcomputer 8 outputs a blinking signal for the direction indicator light 2 and also outputs an oscillation signal to the sound pressure variable circuit 4. This oscillation signal is a signal whose frequency increases over time while the direction indicator light 2 is controlled to blink, and as the frequency increases, the output terminal 4b of the variable sound pressure circuit 4
voltage increases. As a result, the piezoelectric buzzer 31 of the sound generating device 3 generates a blowing sound while the direction indicator light 2 is blinking, with the sound pressure changing from a small sound to a large sound over time.

Further, the microcomputer 8 starts the counting operation from the timing when the direction indicator light 2 starts operating, and if the operation of the direction indicator light 2 is not stopped even after a predetermined period of time has elapsed, the microcomputer 8 starts the counting operation from the timing when the direction indicator light 2 starts operating. Mute or reduce the sound.

As a result, even when the noise inside and outside the vehicle is intense, it becomes possible to confirm whether the direction indicator lamp is in operation based on the blowing sound as time passes.

Note that this invention is not limited to the above-mentioned embodiment, and for example, by connecting a steering angle sensor (not shown) to the microcomputer 8 and detecting the return of the steering wheel, the direction indicator light 2 blinks. If a so-called auto-canceller function is added, when the direction indicator light 2 does not stop blinking due to a failure of the steering angle sensor, the sounding device 3 will notify the auto-canceller of an abnormality. good. At this time, the sound pressure variable circuit 4 and the opening/closing circuit 5 function to ensure that the occupant is notified of the abnormality. Further, in addition to the embodiments described above, the switching circuit may be connected to the output side of the speaker terminal of the audio device, or may be installed inside the audio device.

Effects of the invention This invention has the following effects due to the above-mentioned structural action.

In other words, when the turn signal lights are activated in a noisy environment inside and outside the vehicle, over time it becomes possible to reliably confirm the operation of the turn signal lights by the sound of the blowing sound. Unnecessary operation can be prevented.

In addition, due to the circuit configuration including the steering angle sensor,
When an auto-canceller function is added, a failure of a steering angle sensor or the like can be reliably notified by a blowing sound.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram showing a preferred embodiment of this invention. 1...Direction indicator switch, 2...Direction indicator light,
3...Sound generation device, 4...Sound pressure variable circuit, 5...Opening/closing circuit, 6...Drive circuit, 7...Audio device, 8...Microcomputer, 10...Ignition switch.

Claims (1)

[Scope of utility model registration request] In a direction indicator light operation confirmation device comprising a direction indicator switch for switching left and right direction indicator lights, and a sounding device for notifying the operation of the left and right direction indicator lights, an audio device is activated when the direction indicator lights are activated for a predetermined period of time. A direction indicator light operation confirmation device, characterized in that an opening/closing circuit for reducing sound is connected to the audio device.