JPS6330170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a turn indicator lamp flashing device for a vehicle, and more particularly to a direct current direction indicator lamp flashing device used in a motorcycle or the like.

(Prior Art) In a conventional lamp blinking device of this type, its driving power source is taken from a battery mounted on a motorcycle or the like. However, in this method,
If the power capacity of the battery is small, for example, when turning right, the front (head) right side of the motorcycle and the rear (tail)
When the right direction indicator lamps flash at the same time,
A large current flows from the battery when the lamp is on, and a very small amount of current flows from the battery when the lamp is off. As a result, the battery output voltage fluctuated in synchronization with the flashing of the direction indicator lamp, which adversely affected other electrical loads connected to the battery, such as the engine ignition system. In order to eliminate this problem, it has been found that it is useful, for example, to alternately flash the front and rear right direction indicator lamps of the motorcycle when indicating a right turn, as this averages out the current flowing from the battery. However, even with this method, if one lamp, for example, the rear lamp, goes out due to filament breakage, only the front lamp will blink, so the battery output current will still change significantly as it blinks. Battery output voltage fluctuated. Incidentally, even if a direct current generator is used as a power source instead of a battery, the same problem will occur if the power supply capacity of the direct current generator is small.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention provides that even if the DC power supply has a relatively small power capacity, the DC power supply is When the power supply voltage fluctuates little and one of the direction indicator lamps goes out due to a disconnection,
It is possible to notify the driver of the vehicle, and even during this disconnection failure, it can reduce the change in the current flowing from the DC power supply, thereby reducing power supply voltage fluctuations.Furthermore, it can be provided at low cost. The purpose of the present invention is to provide a direction indicator lamp flashing device.

(Means for Solving the Problems) The vehicular direction indicator lamp blinking device of the present invention includes a DC power source, an intermittent circuit having a power terminal connected to the DC power source, and first and second terminals, and an intermittent circuit. for a vehicle, comprising a first left/right direction indicator lamp and a second left/right direction indicator lamp connected via first and second turn signal switches respectively connected to first and second terminals of the vehicle. In the direction indicator lamp flashing device, the intermittent circuit has break and make switching contacts connected to a power supply terminal, and these break and make contacts are connected to switching switches connected to the first and second terminals, respectively. and one electrode is connected to the power supply terminal, and the other electrode is connected to the first and second left/right direction indicator lamps through parallel first and second diodes and the first and second terminals, respectively. a drive coil that drives the changeover switch to the make contact when it is energized by power supplied from the current supply capacitor and returns to the break contact when it is deenergized, and a drive coil that drives the changeover switch periodically. an oscillation circuit that controls periodic energization and deenergization of the drive coil so as to alternately flash the first and second left and right direction indicator lamps, the oscillation circuit being connected in series with the drive coil; a first switching transistor connected in parallel with the drive coil to the current supply capacitor; and a first switching transistor controllably coupled thereto for controlling "on" and "off" of the first switching transistor. a second switching transistor, the second switching transistor is connected to the first switching transistor;
The series circuit of the second switching transistor and the first resistor is connected in parallel with the current supply capacitor, and the oscillation circuit is connected between the power supply terminal and the drive coil. The intermittent circuit includes second and third resistors and a control capacitor that controls the oscillation frequency, and the connection point between the second and third resistors is connected to the base of the second switching transistor. connected to a disconnection detection circuit including a third resistor that detects disconnection of the first left/right direction indicator lamp connected between the connection point of the second and third resistors of the circuit and the first terminal; An operation indicator lamp is provided between the power supply terminal and the second terminal to monitor the operation of the second left/right direction indicator lamp.

(Function) The current supply capacitor that supplies power to the drive coil for switching the changeover switch between the break contact and the make contact passes from the DC power source through the current supply capacitor, and then separates from the first and second circuits in parallel. the first and second through the second diode.
The battery is charged via two paths passing through the left and right direction indicator lamps.

In the oscillation circuit, the second
and a circuit through the third resistor and the drive coil forms a charging circuit for the control capacitor, and the current flowing through the second resistor supplies a base current to the second switching transistor to turn it "on";
Next, the first switching transistor connected in series with the drive coil is turned off, and as the control capacitor continues to charge and the base current disappears, the second switching transistor is turned off and the first switching transistor is turned off. Turn it "on" and switch the changeover switch to the make contact. The second and third resistors and the first switching transistor form a discharge circuit for the control capacitor, and the discharge current reverse biases the second switching transistor.

In the disconnection detection circuit, when there is no disconnection in the first left/right direction indicator lamp and the changeover switch is switched to the make contact, a current flows from the power supply terminal to the disconnection detection circuit via the second resistor to the second switching transistor. However, if there is a break in the first left/right direction indicator lamp and the changeover switch is a make contact, the current from the resistor does not flow, and the base current flows to the second switching transistor. is not supplied, and the second switching transistor is not turned on, thereby causing the first switching transistor to continue to be turned on, resulting in substantially continuous illumination of the second left/right direction indicator lamp. maintain.

In addition, when there is a break in the second left/right direction indicator lamp and the changeover switch is switched to the break contact, the charging path runs from the power supply capacitor to the second output terminal and then through the second left/right direction indicator lamp. is cut off and charging becomes impossible, which causes the changeover switch to maintain the break contact position and switch to the first
The left and right direction indicator lamps will illuminate continuously. Further, the operation indicator lamp of the direction indicator lamp is connected to the second output terminal, and when the second direction indicator lamp is disconnected, the light is turned off when the changeover switch is at the break contact, and it is turned on when there is no disconnection.

(Example) Hereinafter, an example of a flashing device according to the present invention will be described with reference to the accompanying drawings.

Intermittent circuit 100 includes a power supply terminal 103 and output terminals 101 and 102. A DC power source 104 such as a battery or a DC generator is connected to the power terminal 103 via an engine switch 121.

A direction switch 105 is connected to the output terminal 101.
For example, left and right direction indicator lamps 106 and 107 on the head of the motorcycle are connected to the output terminal 102 through a direction indicator switch 105b, and left and right direction indicator lamps 108 and 10 on the tail of the motorcycle are connected to the output terminal 102 through a direction indicator switch 105b.
9 is connected. Additionally, a monitor operation indicator lamp 110 is provided between the output terminal 102 and the power supply terminal 103.
is connected and placed in a position that is easily visible to the driver.

The intermittent circuit 100 alternately blinks two left direction indicator lamps 106, 108 among left and right direction indicator lamps 106, 107 and 108, 109 on the head and tail parts, and similarly blinks two right direction indicator lamps 107, This is a circuit for making 109 blink alternately. In this intermittent circuit 100, one electrode of the current supply capacitor 18 is connected to the power supply terminal 103, and the other electrode is connected to the output terminal 103 through the diodes 16 and 17 connected in parallel.
1 and 102, respectively. Therefore, these parallel diodes 16, 17 and the head and tail direction indicator lamps 106, 10 connected to them via the direction indicator switches 105a, 105b.
7, 108, 109 are current supply capacitors 1
It constitutes a part of the charging circuit of No. 8. The current supply capacitor 18 is connected in parallel with the series circuit of the transistor 3 and the drive coil 22, and serves as a current supply source for energizing the drive coil 22 with the charge stored in the capacitor 18.

A changeover switch 1 is connected to the power supply terminal 103, and is driven from the break contact (left side in the figure) to the make contact (right side in the figure) by the electromagnetic force generated when the drive coil 22 is energized. A break contact is connected to one output terminal 101 and a make contact is connected to the other output terminal 102.
A diode 20 is connected in parallel with the drive coil 22 and absorbs the back electromotive force generated in the drive coil 22.

The oscillation circuit 30 is configured as follows.
The PNP type transistor 3 constitutes a first switching transistor, and the drive coil 22 is connected to the collector side of the transistor 3, and the drive coil 22 is energized intermittently. A series circuit of transistor 3 and drive coil 22 is connected in parallel to power supply capacitor 18 . The PNP type transistor 4a constitutes a second switching transistor, the collector of which is connected to the base of the transistor 3 and the resistor 15, and controls the transistor 3 on and off. A series circuit of transistor 4a and resistor 15 is also connected in parallel to current supply capacitor 18, forming a discharge path thereof.

One electrode of a control capacitor 5 that controls the oscillation frequency of the oscillation circuit 30 is connected to the power supply terminal 103 via a resistor 14 and a resistor 13, and the other electrode of the capacitor 5 is connected to the drive coil 22. The resistors 14 and 13 and the drive coil 22 constitute a charging path for the control capacitor 5. Also, resistance 1
The connection point between 4 and 13 is connected to the base of transistor 4a, and the stabilizing capacitor 120 is connected between the collector and base of transistor 4a.

The resistor 12 is connected between the connection point of the resistors 14 and 13 and the output terminal 101 (or the conductor between the break contact and the output terminal 101), and constitutes a disconnection detection circuit. This disconnection detection circuit detects when there is no disconnection in the left and right direction indicator lamps 106 and 107 on the head.
When the changeover switch 1 switches from the break contact to the make contact, a potential difference appears between the power supply terminal 103 and the output terminal 101, so that the current flows to the power supply terminal 10.
3, passes through the base of the transistor 4a and 12, and flows to the output terminal 101, thereby detecting a disconnection. In connection with this, a circuit such as the resistor 12 is not provided to detect disconnection of the left and right direction indicator lamps 108 and 109 on the tail, but in this case, if there is a disconnection in these left and right direction indicator lamps 108 and 109, This is detected because the charging circuit of the current supply capacitor 18 is cut off and charging becomes impossible.

Next, the operation of the direction indicator lamp flashing device of the present invention will be explained. First, the operation when all the direction indicator lamps 106 to 109 on the head and tail sections are normal will be described.

Assume that the engine switch 121 is "on" and the direction indicating switches 105a, 105b are switched from a neutral standby state to the right side, that is, to the side of the direction indicating lamps 107 and 109. Note that in the standby state, the current supply capacitor 18, the control capacitor 5, and the capacitor 120 are all in an uncharged state. When the direction indicating switches 105a and 105b are turned on, the current supply capacitor 18 is connected to the DC power supply 10.
4, engine switch 121, current supply capacitor 18, diode 17, direction indicator lamp 10
9 and then to the ground, it is quickly charged.

At this time, the transistor 4a includes a resistor 13,
A base current due to charging of the control capacitor 5 flows through the path between the control capacitor 5 and the drive coil 22 . Therefore, the transistor 4a is turned on, the transistor 3 is turned off, the drive coil 22 is not operated, and the changeover switch 1 becomes a break contact (on the left side in the figure) and turns on the direction indicator lamp 107. This base current continues to charge the control capacitor 5, and eventually disappears when it is completely charged, at which time the transistor 4a is turned off. Then, the base current from the resistor 15 flows through the transistor 3, turning the transistor 3 on, current is supplied to the drive coil 22 from the current supply capacitor 18, the changeover switch 1 is activated, and the make contact (on the right side of the figure) is turned on. Then, the direction indicator lamp 109 is turned on.

At this time, a discharge path of the control capacitor 5 is formed by the (+) side of the capacitor 5, the resistor 14, the transistor 3, and the (-) side of the capacitor 5, and this discharge current reverse biases the base of the transistor 4a. It turns out. On the other hand, the current in the path leading to the ground via the resistor 12 of the disconnection detection circuit and the direction indicator lamp 107 flows in the direction that causes the base current to flow through the transistor 4a. While the voltage of the control capacitor 5 is high, the discharge current of the control capacitor 5 is stronger, and the base of the transistor 4a is reverse biased.
As the voltage decreases as the transistor 4a discharges, the current flowing through the resistor 12 becomes larger and the transistor 4a turns on. That is, the transistor 4a is turned on again after a certain period of time. At this time, transistor 3 is "off"
However, the contact of the changeover switch 1 returns to the break contact and turns on the direction indicator lamp 107.

Thereafter, the transistor 4a is turned on while the control capacitor 5 is charged in the same manner as described above, and the oscillation circuit 30 oscillates in the same manner.

Therefore, the make contact and the break contact of the changeover switch 1 are alternately turned on, and the direction indicator lamps 107 and 109 flash alternately.

Incidentally, since the current supply capacitor 18 is charged by the diode 16 or 17 regardless of whether the changeover switch 1 is on the break contact or the make contact, the capacitance of the capacitor 18 may be small.

Next, the head and tail direction indicator lamps 106,1
A case where wires 07, 108, and 109 are disconnected will be explained. First, the operation when the changeover switch 1 is at the break contact and the direction indicator lamp 109 is disconnected will be described. If the direction indicating switches 105a and 105b are turned on to the right in this state, the current supply capacitor 1
8 is cut off, and the oscillation circuit 30
is not working. For this reason, the direction indicator lamp 107 is lit continuously.

Further, when the direction indicator lamp 109 is disconnected during the flashing operation, the operation will be as follows.

When the drive coil 22 is not energized and the changeover switch 1 is a break contact, the current supply capacitor 18 is connected to the transistor 4a and the resistor 15.
discharge through a series circuit of This discharge time is the non-energized time of the drive coil 22 during normal blinking operation (approximately
0.3 to 0.4 seconds), the current supply capacitor 18 will be completely discharged during the non-energization time of the drive coil 22, and the current supply capacitor 18 will be
The power cannot be turned on again. Therefore, as before, the direction indicator lamp 107 is lit continuously.

Next, the operation when the direction indicator lamp 107 is disconnected will be explained.

When the changeover switch 1 is at the break contact and the direction indicating switches 105a and 105b are turned on to the right side, the charging current of the control capacitor 5 turns on the transistor 4a. Eventually, when the charging of the control capacitor 5 is finished, the base current disappears and the transistor 4a is turned off, but thereafter the transistor 4a is not turned on. In other words, during normal blinking, when the changeover switch 1 leaves the break contact, the base current flows from the resistor 12 of the disconnection detection circuit to the direction indicator lamp 107, but the direction indicator lamp 1
The disconnection of 07 interrupts this path, so transistor 4a cannot be turned on again.

Now, at this time, after a certain period of time, the transistor 3 is turned on continuously, and the drive coil 22
The current from the current supply capacitor 18 is supplied to the current supply capacitor 18.

When the drive coil 22 is energized and the changeover switch 1 is in the make contact, the current supply capacitor 18 has no charging path, and is discharged by the transistor 3, its terminal voltage decreases, and the drive coil 22
When the voltage drops below the return voltage, the changeover switch 1 once becomes a break contact, and once the capacitor 18 is charged, it becomes a make contact again. This operation is continued for a time determined by the current supply capacitor 18 and the drive coil 22, but the changeover switch 1
The time the lamp 109 is at the break contact point is extremely short and the lamp 109 is lit almost continuously. Therefore, when the direction indicator lamp is normal, it flashes alternately, and when the direction indicator lamp is disconnected, the remaining lights are turned on substantially continuously.

(Effects of the Invention) As described above, in the present invention, in the normal state when the lamps are not disconnected, the direction indicator lamps are energized alternately, so the DC power supply is not loaded for a relatively long time. Because there is no DC power supply, the power supply voltage does not fluctuate significantly and does not adversely affect other electrical loads connected to this DC power supply. Furthermore, an inexpensive DC power source with a relatively small power supply capacity can be used. In addition, even if one lamp stops lighting due to a lamp breakage failure, the other lamp remains lit continuously, so the driver can be notified of the lamp breakage, and the lamp is energized virtually continuously.
This has the effect of suppressing voltage fluctuations in the DC power supply. In addition, the current supply capacitor 18
Since power is supplied from both the first and second diodes 16 and 17, a small capacitor with a small capacity can be used. Also, the oscillation circuit is
First and second switching transistors 3, 4a
This has the advantage that the disconnection detection circuit 12 for detecting disconnection of the direction indicator lamp can be configured only with inexpensive resistors.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram of a vehicle direction indicator lamp flashing device according to an embodiment of the present invention. In the figure, 1... a changeover switch, 3... a transistor (first switching transistor),
4a...Transistor (second switching transistor), 5...Control capacitor, 12...
Resistor (disconnection detection circuit), 13, 14...Resistance, 1
5...Resistor, 16, 17...Diode, 18...
...Current supply capacitor, 22...Drive coil,
30...Oscillation circuit, 100...Intermittent circuit, 10
1,102...Output terminal, 103...Power terminal,
105a, 105b...Direction switch, 10
6,107...first left/right direction indicator lamp, 10
8,109...Second left/right direction indicator lamp, 11
0...Operation indicator lamp.

Claims (1)

[Scope of Claims] 1. A DC power supply 104, an intermittent circuit 100 having a power terminal 103 connected to the DC power supply, and first and second output terminals 101, 102, and first and second output terminals of the above-mentioned intermittent circuit. first and second direction indicating switches 105a and 105b respectively connected to the output terminals of the first and second direction indicating switches 105a and 105b, and a first left and right direction indicating lamp 106 connected to the first and second direction indicating switches, respectively.
107 and second left/right direction indicator lamp 108,1
09, the disconnection circuit 100 is connected to the power supply terminal 103 and has break and make switching contacts, and the break and make contacts are connected to the first and make contacts, respectively. Second output terminal 10
A changeover switch 1 is connected to terminals 1 and 102, and one electrode is connected to the power supply terminal 103.
The other electrode is connected to the first and second diodes 1 in parallel.
6, 17 to the first and second output terminals 1
A current supply capacitor 18 is connected to terminals 01 and 102, respectively, and a current is supplied from the current supply capacitor 18 to drive the changeover switch 1 to the make contact when energized and to the break contact when deenergized. a drive coil 22 for returning the first and second left/right direction indicator lamps 106, 10 to
7, 108, and 109, the oscillation circuit 30 is connected in series to the drive coil 22; The current supply capacitor 1 together with the drive coil 22
a first switching transistor 3 connected in parallel to said first switching transistor 3; and a second switching transistor controllably coupled thereto for controlling "on" and "off" of said first switching transistor 3. 4a, the second switching transistor 4a is connected in series with the first resistor 15, and the second switching transistor 4a is connected in series with the first resistor 15.
The series circuit of A and the first resistor 15 is connected in parallel with the current supply capacitor 18, and the oscillation circuit 30 is connected to the second and second resistors connected between the power supply terminal 103 and the drive coil 22. 3 resistors 14, 13 and a control capacitor 5 for controlling the oscillation frequency, the second and third resistors 14, 1
3 is connected to the base of the second switching transistor 4a, thereby connecting the second and third resistors 14, 13 and the drive coil 2.
2 forms a charging circuit for the control capacitor 5, and the second and third resistors 14, 13 and the first switching transistor 3 form a discharge circuit for the control capacitor 5. Oscillation occurs due to charging and discharging of the capacitor 5, and the intermittent circuit 100 is connected to the oscillation circuit 3.
the first left/right direction indicator lamps 106, 10 connected between the connection point of the second and third resistors 14, 13 of 0 and the first output terminal 101;
The disconnection detection circuit 12 is connected to a disconnection detection circuit 12 consisting of a third resistor 12 for detecting disconnection of the circuit 7.
is the first left/right direction indicator lamp 106, 10.
7, and when the changeover switch 1 is switched to the make contact, the current flowing from the power supply terminal 103 to the disconnection detection circuit 12 causes the second switching transistor 4a to
However, when the first left/right direction indicator lamps 106, 107 are disconnected and the changeover switch 1 is a make contact, the base current is supplied to the second switching transistor 4a. Therefore, the second switching transistor 4a does not turn on, and the first switching transistor 3 continues to turn on.
08, 109 substantially continuously lit, and the second left/right direction indicator lamp 108,
There is a disconnection in 109, and the changeover switch 1
is switched to the break contact, the current supply capacitor 18 is connected to the second terminal 1.
02 to the second left/right direction indicator lamp 10
The charging path passing through terminals 8 and 109 is cut off, making charging impossible, and as a result, the changeover switch 1 maintains the break contact position, and the first left and right direction indicator lamps 106 and 107 are lit continuously, and the power supply terminal 103 and the second output terminal 102, an operation indicator lamp 110 for monitoring the operation of the second left/right direction indicator lamps 108, 109 is provided.