JPS59167930A - Flashing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flashing device for a single vehicle, which flashes a lamp by, for example, opening and closing contacts of a relay.

・Conventional technology and its problems> As a function of the flasher, if one main lamp is disconnected, it is required to deviate from the normal number of flashes, and for this reason, it is necessary to provide some kind of current detection means. As a detection means, one is known in which a low resistance is connected in series between one terminal of the battery and the voltage drop across the resistance is treated as a blinking frequency control signal. However, such current detection means has the disadvantage that when a hazard signal is signaled, twice as much current as when a turn signal flows, which increases the heat generated by the low resistance, which adversely affects not only this low resistance but also other components. Here, a method can be considered to minimize the resistance value of the series resistor, but in this case, heat generation can be suppressed, but high performance is required for the current detection circuit, resulting in problems such as increased cost. .

There is also a method of detecting overcurrent in the overcurrent area and stopping the blinking function, but if the blinking is stopped,
It is not possible to notify other vehicles that the vehicle is stopped, and there is a risk of a vehicle accident such as a collision, especially at night. It is necessary to set the current by adding the current in consideration of malfunction, and this case also has the drawback that heat generation occurs due to the current added in consideration of malfunction.

<Object of the Invention> Therefore, the object of the present invention is to reduce the pulse width of the pulse current supplied to the relay coil by the output signal of the voltage converter in the hazard signal region, thereby preventing an increase in the amount of heat generated due to an increase in current, and reducing the amount of heat generated. The object of the present invention is to provide a flashing device that does not cause accidents due to burnout.

<Structure and Effects of the Invention> In order to achieve the above object, the flashing device according to the present invention has a first electrode connected to one terminal of one battery.
- to the other electrode of the transistor.

a 21st electrode connected to the other one of the battery terminals;
~ Connect the base of the transistor, connect the other electrode of this second transistor to the other end of the relay coil whose one end is connected to one of the battery terminals, and connect the resistor, the contact of the relay, and the lamp between the battery terminals. are connected in series, and input terminals of a voltage converter are connected to both ends of the resistor, respectively,
The output terminal of this voltage converter is connected to the other end of the capacitor whose one end is connected to the base of the eleventh to transistors and the second end of the capacitor.
the second electrode, respectively connected to the other electrode of the transistor;
A pulse current is supplied to the relay coil by turning the transistor ON and OFF, and the lamp is blinked through the 1-N contact, and as the lamp current flowing through the resistor increases or decreases, the voltage converter 1b is characterized in that the pulse width of the pulse current is decreased or increased depending on the output signal.

According to this invention, as the lamp current flowing through the resistor increases, the output signal of the voltage converter increases
17. Since the pulse width of the pulse current supplied to the relay coil is decreased, the relay contact is turned ON.
The time becomes shorter, and the heat generated by the increase in current decreases by the amount of time that is shortened.

There is no need to worry about accidents due to burnout.

<Description of Embodiment> FIG. 1 shows an embodiment of a blinking circuit according to the present invention, in which one battery terminal 1, 2 . First transistor3. Second transistor4. Relay coil 11° Relay contact 12. Capacitor 10. Resistance 5,6°7.8.9,15. Voltage converter 13. J5 is composed of a load terminal 14, and a lamp circuit 20 is connected to the load terminal 14 as shown in FIG.

Next, the operation of this circuit will be explained.

Initially, the turn signal switch 16 as shown in FIG.
and hazard signal switch 17 are both OFF
In this state, the base current does not flow through the first transistor 3, so the first transistor 3 is OFF, and therefore the 2i-th transistor 4 is also OFF, but the relay coil 11 is not energized and the relay contact 12 is 0FF
I'm L.

Now turn on the turn signal switch 16 to the lamp 18 side.
In this case, the base current of the first transistor 3 whose emitter is connected to the battery terminal 1 flows through the resistor 7 and the lamp 18, so the first transistor 3 is turned on.

The second transistor 4 has an emitter connected to the battery terminal 2, a collector connected to the other end of the relay coil 11 whose one end is connected to the battery terminal 1, and a base connected to the collector of the first transistor 3 via a resistor 15. Since it is connected by
When the first transistor 3 is turned on, the second transistor 4 is turned on, the relay coil 11 is energized at 11.r, the relay chain point 12 is turned on, and the lamp 18 is turned on.

At the base of the 11th Helan Sister 3, there are resistors 6, 8°9,
A charging circuit consisting of a capacitor 10 is connected to J3,
The recondenser 10 is charged when the 21st to run sister 4 h is turned on. At this time, the voltage converter 13 converts the voltage drop across the resistor 5 into a constant voltage,
By using this as the output voltage, the amount of charge in the capacitor 10 is determined, and the charging time is determined by the time constant of the 6° resistor and capacitor 10. Note that the voltage converter 13 has a function of storing the output voltage at this time.

When 0 is charged, the first transistor 3
The base potential of becomes l-1ight potential after a certain period of time,
The 1i to 3 transistors are turned off. When the first transistor 3 turns OFF, the second transistor 4 also turns OFF.
L, Relay - The coil 11 is no longer energized, the relay contact 12 is 0FFt, and the lamp 18 is turned off. ]Ndenza]0 charge is resistor 7. It is discharged through the lamp 18, and at this time, the output voltage stored at the time of charging the capacitor 10 outputted from the voltage converter 13 is converted to a constant voltage, and the discharge time of the charge in the capacitor 10 is determined. I have decided.

When the charge in the capacitor 10 is discharged, the base potential of the first transistor 3 becomes a low potential again after a certain period of time, and the above operation is repeated. Incidentally, the waveform diagram of the pulse current supplied to the relay coil 11 at the time of this turn signal is shown in FIG. 2(a).

Next, when the hazard signal switch 17 is turned on, the lamp 18. Each of the lamps 19 is turned on, and performs the turn signal operation and round-trip operation, except for the following points.

During a hazard signal, approximately twice as much lamp current flows as when a turn signal is generated, so the amount of voltage drop across the resistor 5 is also doubled, and the output voltage of the voltage converter 13 is higher than the output voltage issued during a turn signal. Capacitor ] 0 is completely charged in a shorter time than at the time of the turn signal.

In other words, the pulse width of the pulse current supplied to the relay coil 11 is reduced by α as shown in FIG. 2(b). The voltage converter 13 stores the output voltage at this time, and when the charge of the capacitor 10 is discharged, the voltage converter 13 outputs an output obtained by converting the stored output voltage into a constant value. The voltage turns off the relay contact 12 for a time equal to the time α added to the OFF time of the relay at the time of the turn signal. In other words, the period between discharge 1 and 1 of the capacitors 1 and 10 is lengthened.

, then the fuse will blow from the current in the overcurrent region, that is, the maximum current that flows at the time of the hazard signal.
As shown in C), the pulse width of the pulse current supplied to the relay coil 11 is rapidly decreased by the output voltage of the voltage converter 13, and the output voltage at this time is stored in the voltage converter 13 and kept constant. The OFF ll'j distance of the relay contact is determined by the output voltage converted to the magnitude of .

Therefore, the heat generation of the resistor 5 is suppressed by the shortened pulse width, and since the lamp continues to blink even within the overcurrent region, it is possible to prevent vehicle accidents such as collisions.

Note that the first transistor 3. Second transistor 4, capacitor 10. By integrating the voltage converter 13 and the like into an integrated circuit, the same operation as described above can be performed with a simple component configuration, and the circuit is miniaturized and reliability is improved.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing a flashing device according to an embodiment of the present invention, Fig. 2 is a waveform diagram of a pulse current supplied to a relay coil, and Fig. 3 is an electric diagram showing a flashing device according to an embodiment of the present invention. It is a circuit diagram. 1.2... battery one terminal, 3... first transistor. 4... Second transistor, 5... Resistor, 1o...
Capacitor, 11... Relay coil, 12... Relay contact. 13...Voltage converter. Patent applicant Tateishi Electric Co., Ltd. Figure 7 No. 2 Concave No. 3 Concave -164-・

Claims (2)

[Claims] (1) Connect the base of a second transistor, whose one electrode is connected to the other terminal of the battery, to the other electrode of the transistor 1i, whose one electrode is connected to one terminal of the battery, and The other electrode of the transistor is connected to the other end of a relay coil whose one end is connected to one terminal of a battery, and a resistor, a contact point of the relay, and a lamp are connected in series between the terminals of the battery, and both ends of the resistor are connected to the other end of the relay coil. The input terminals of the voltage converter are connected to each other, and the output J terminal of the voltage converter is connected to the other end of a capacitor whose one end is connected to the base of the first transistor and the other electrode of the second transistor. , ON of the second transistor
, OFF supplies a pulse current to the relay coil to blink the lamp through the contacts of the relay, and as the lamp current flowing through the resistor increases or decreases, the output signal of the voltage converter increases or decreases the pulse current. A flashing device characterized in that the pulse width of the pulse width is decreased or increased. (2) The flashing device according to claim 1, wherein the first transistor, the second transistor, the capacitor, and the voltage converter are integrated into an integrated circuit.