JPS6136033A - Flashing unit for car - Google Patents

Abstract

PURPOSE:To alarm the disconnection of a direction indicator lamp with simple structure by connecting an intra-meter hazard lamp to a comparison and decision circuit that detects the disconnection of the direction indicator lamp. CONSTITUTION:While an ignition switch 2 is turning on, a direction indication switch 7 is operated. For example, when the contact piece 7a is connected to a right rotation display contact 7b side, right direction indicator lamps 4R blink by the preset blinking cycle of a blinking drive circuit 3. In this case, since the voltage of a contact 7b repeats H and L levels, the current applied from a power supply terminal 1 through the resistor 12 of a comparison and decision circuit A flows into left direction indicator lamps 4L. Since the resistance value of the resistor 12 is fully high, the lamps 4L do not light. As a result, when at least one of the lamps 4L is disconnected, a comparator 8 outputs the H level and turns on a transistor 14 and then blinks a hazard lamp 5.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a direction indicator mechanism including a plurality of direction indicator lamps that flash once to indicate the direction of a vehicle, and a direction indicator mechanism that provides a direction indicator mechanism that includes a plurality of direction indicator lamps that flash once to indicate the direction of a vehicle, and a direction indicator mechanism that provides a direction indicator mechanism that includes a plurality of direction indicator lamps that flash once to indicate the direction of a vehicle. The present invention relates to a vehicle flashing device that also has a disconnection detection mechanism.

[Technical background of the invention and its problems]

If the filament of a light bulb in a turn signal lamp or other vehicle is broken and becomes inoperable, it can cause an accident such as rear-end collision with another vehicle, which is extremely dangerous. Conventionally, in order to detect a break in the turn signal lamp on the side that is turned on, for example, a flashing device for a vehicle is configured such that the flashing cycle of the turn signal lamp changes when one of the turn signal lamps is broken. Utility Model Publication No. 57-35487 is publicly known.However,
In this type of equipment where the blinking cycle changes, the difference in the blinking cycle between normal and disconnected times cannot be made as thick as that, so the operation may continue without intuitively noticing the change in cycle. Some vehicles were equipped with audible warning devices such as buzzers, but these had the disadvantage of having a large number of components, which increased the cost of the vehicle.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a flashing device for a vehicle that warns the driver of disconnection of a direction indicator lamp using a component of a conventionally equipped vehicle and that can be easily noticed by the driver. That is.

[Structure of the invention]

The configuration of the present invention to achieve the above object includes a power source, a blinking drive circuit that converts the power source voltage into a pulse signal, a hazard switch and a direction indicator switch connected in parallel,
In a vehicle flashing device in which a plurality of left and right direction indicator rungs connected in parallel are connected in series, an input side of a comparison and discrimination circuit for detecting disconnection of the direction indicator lamp is connected to a connection point between the direction indicator switch and the direction indicator lamp, A switching element is connected to the output side of this comparison/discrimination circuit, and a hazard lamp connected in series with the power supply is connected to this switching element.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 1 shows a first embodiment, in which reference numeral 1 denotes a power supply terminal connected to a batch IJE of a vehicle via an ignition switch 2, the cathode of which is grounded. 3 is direction indicator lamp 4L,
This is a blinking drive circuit that blinks the 4R and the hazard lamp 5 installed inside the meter, which displays the hazard function, at a predetermined period. Generates a pulse voltage of

6 is a normally open hazard switch connected to the left and right direction indicator lamps 4L and 4R;
By closing the left and right direction indicator lamps 4L and 4R.
And the hazard lamp 5 is blinked by the blinking drive circuit 3. Reference numeral 7 designates a direction indicating switch equipped with a contact piece 7a, contacts 7b and 7c, the contact piece 7a is connected to the output end of the blinking drive circuit 3, the contact point 7b is connected to one end of the direction indicating lamp 4R, and the contact point 7c is connected to the output end of the blinking drive circuit 3. It is connected to one end of the direction indicator lamp 4L, and the other ends of the direction indicator lamps 4L and 4R are grounded.

In addition, at least one inside the left and right direction indicator lamps 4L and 4R.
Each one is a direction indicator lamp inside the meter inside the car. 8
is a comparator that determines whether the direction indicator lamps 4L, 4R are disconnected, and the (A) terminal of this comparator 8 is connected to the contact 7 of the direction indicator switch 7 via backflow prevention diodes 9L, 9R.
c, 7b, and the (f) terminal is connected to the connection point of the reference voltage generating resistor 10.11 connected in series to the power supply terminal 1, and the (a) terminal Connected to power supply terminal 1. This comparator 8 and resistor 1
0.11 constitutes a comparison/discrimination circuit A for detecting wire breakage. The output terminal of the comparator 8 is connected via a resistor 13 to the base terminal of a transistor 14 which is a switching element, the emitter terminal of this transistor 14 is grounded, and the collector terminal is connected via a hazard lamp 5 to a power supply terminal 14.
It is connected to the.

Next, the operation of the present invention with the above configuration will be explained in detail.

First, with the ignition switch 2 turned on, operate the direction switch 7 and push the contact piece 7a to the contact point 7b, which is the right turn display contact. The direction indicator lamp 4R flashes. When the direction indicator lamp 4R flashes, contact 7
Since the voltage at b repeats H level or L level, the current flowing from power supply terminal 1 through resistor 12 is caused by diode 9.
L and the left direction indicator lamp 4L. On this occasion,
The resistance value of the resistor 12 is set to be sufficiently large so that the left direction indicator lamp 4L does not light up. The direction indicator lamps 4L are all connected in parallel, and the relationship between the combined resistance value R1 of these parallel resistances when none is disconnected and the combined resistance value R2 when at least one is disconnected is R,< R
,. Then, when the combined resistance value of the parallel resistances becomes R1 in the relationship between the potential ■1 of the (→ terminal/child) and the voltage ■2 of the (to) terminal of the comparator 8, V, < V, and the voltage of the parallel resistance When the combined resistance value is R2, V, > V,
Since the reference voltage generating resistors 10 and 11 are set so that
Output the level. When the L level is output, the transistor 14 is turned off and the hazard lamp 5 is not lit. On the other hand, when the H level is output, the transistor 14 becomes O
"N," current flows through the hazard lamp 5, and it lights up. In this way, the hazard lamp 5 blinks according to the predetermined blinking cycle of the blinking drive circuit 3. For example, if at least one of the left direction indicator lamps 4L is disconnected, the driver turns right. When the direction indicator switch 7 is turned to the turn side, the nose lamp 5 flashes, allowing the driver to know that there is a disconnection.

In addition, although the above operation description shows the case where at least one of the left direction indicator lamps 4L is disconnected, the resistance and connection of the right direction indicator lamp 4R are also the same as those of the left direction indicator lamp 4L, so the right side direction indicator lamp 4L is disconnected. If at least one of the direction indicator lamps 4R is broken, the driver will know that the direction indicator lamp 5 is broken when the contact piece 7a is brought down to the contact 7C, which is a left turn indicator contact.

If the hazard switch 6 is closed when the direction indicator lamps 4L and 4R are normal, all of the direction indicator lamps 4L and 4H blink at a predetermined blinking cycle of the blinking drive circuit 3.

Furthermore, an H level or L level voltage is generated on the anode side of the diodes 9L and 9R. In the case of the H level, the potential ■1 becomes approximately the voltage of the power supply terminal 1, V, > V2, so the hazard lamp 5 lights up.In the case of the L level, the potential ■1 becomes approximately the O level, and V, <V
, the hazard lamp 5 is turned off. Therefore, the hazard lamp 5 flashes like the direction indicator lamps 4L and 4R.

FIG. 2 shows a second embodiment of the present invention, in which the same symbols as in FIG. 1 indicate the same functions, and detailed explanation thereof will be omitted. The difference between this embodiment and the first embodiment is the left and right direction indicator lamps 4L.

This is because a comparator 8 is provided in each of the 4Rs.

That is, the contact point 7b of the direction indicator switch 7 is connected to the right direction indicator lamp 4R connected in parallel via the resistor 21, and the connection point between the resistor 21 and the direction indicator lamp 4R is connected to the hazard switch 6 and the comparator 22. (g) Connected to the terminal. The connection point of the reference voltage generating resistors 23 and 24 is connected to the ←) terminal of the comparator 22, as in the first embodiment. On the other hand, similarly, the contact point 7C is connected to the left direction indicator lamp 4L connected in parallel via the resistor 25,
The connection point between this resistor 25 and the direction indicating ramp '4L is connected to the hazard switch 6 and the (G) terminal of the comparator 6.

The (b) terminal of the comparator 26 is connected to the connection point of the reference voltage generating resistors 27 and 28. two comparators 2
The output of 2°26 is connected to the base terminal of transistor 14 via resistor 13. These comparators 22,2
6. Comparison/discrimination circuit A is constituted by resistors 23, 24, 27, and 28.

In the second embodiment configured in this way, the combined resistance value of the parallel resistances of the direction indicator lamps 4R is equal to that of all the lamps 4R.
When it is normal, it becomes Ro, and when even one wire breaks, it becomes R2, and the relationship between R1 and R7 is R,<R.

Then, in the relationship between the potential ■1 of the (A) terminal of the comparator 22 and the potential ■2 of the (→ terminal), when the combined resistance value of the parallel resistances becomes R1, ■1<■2, and the Since the reference voltage generating resistors 23 and 24 are set so that V+ > V- when the resistance value becomes l(t), the comparator 22 outputs L level when all direction indicator lamps 4R are normal, and , outputs H level when at least one wire is disconnected.Furthermore, since the blinking voltage of the blinking drive circuit 3 is supplied to the (G) terminal of the comparator 22 via the resistor 21 and the direction indicating switch 7, Connect direction switch 7 to contact 7b
When the direction indicator lamp 4R is turned to the side, if all the direction indicator lamps 4R are normal, the potential ■1 is always lower than the potential ■2 and the comparator 26
Since the potential v: is approximately at the O level, the no-zard lamp 5 does not light up. On the other hand, if at least one of the direction indicator lamps 4R is disconnected, the combined resistance of the direction indicator lamp 4R becomes large, and depending on the flashing cycle, the potentials ■ and 2 become higher or lower than the potential ■2, and the comparator 22 outputs H level and L level alternately, and hazard lamp 5
flashes.

In addition, the above operation description shows the case where at least one of the right direction indicator lamps 4R is disconnected.If at least one of the left direction indicator lamps 4L is disconnected, the contact piece 7a is used as the left turn indication contact. When the contact point 7C is turned on, the hazard lamp 5 flashes, allowing the driver to know that the wire is disconnected.

If the hazard switch 6 is closed when the direction indicator lamps 4L and 4R are normal, all of the direction indicator lamps 4L and 4R blink at a predetermined blinking cycle of the blinking drive circuit 3.

Also, the (G) terminal of the comparator 22゜26 also has an H level or L level.
level voltage is generated. In the case of H level, the potential ■.

<VS> is the voltage of the power supply terminal 1, and V,>V
.

, (V'+>'V:), the hazard lamp 5 is turned off. Therefore, the hazard lamp 5 flashes like the direction indicator lamps 4L and 4R.

In this way, since the conventional hazard lamp in the meter is flashed when the direction indicator lamp is disconnected, there is no need to use a new part to warn of disconnection, and the configuration is simple and inexpensive. In addition, since the hazard lamp in the meter, which does not blink during normal driving, blinks, the driver can easily notice the burnout of the lamp and prevent a rear-end collision from another vehicle.

〔Effect of the invention〕

As described in detail above, according to the present invention, the hazard lamp in the main frame is connected to the comparison and discrimination circuit that detects the disconnection of the direction indicator lamp, so that it is possible to easily warn of the disconnection of the direction indicator lamp with a simple configuration. It is possible to provide a vehicle flashing device that the driver can notice.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a first embodiment of the present invention, and FIG. 2 is a circuit diagram showing a second embodiment of the invention. 3... Flashing drive circuit 4R, 4L... Direction indicator lamp
5. Hazard lamp 7. Direction switch 8.
,・Comparison M 10, 11・・Reference voltage generation resistor 1
4... Switching element A... Comparison/discrimination circuit E... Power supply patent Applicant: Nippon Seiki Co., Ltd. Representative Patent Attorney Mamoru Ushiki', °7″゛. ゛・,゛□

Claims (1)

[Claims] A flashing device for a vehicle in which a power source, a flashing drive circuit that converts the power supply voltage into a pulse signal, a hazard switch and a direction indicating switch connected in parallel, and a plurality of left and right direction indicating lamps connected in parallel are connected in series. The input side of a comparison and discrimination circuit for detecting disconnection of the direction indicator lamp is connected to the connection point between the indicator switch and the direction indicator lamp, a switching element is connected to the output side of this comparison and discrimination circuit, and the switching element is connected to the power supply. A flashing device for a vehicle characterized by connecting hazard lamps connected in series.