JP4010652B2 - Direction indicator lighting circuit for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular direction indicator lighting circuit, and more particularly, to a vehicular direction indicator lighting circuit having a simple and inexpensive configuration and capable of performing a predetermined operation without being affected by blinker blinking and hazard blinking.
[0002]
[Prior art]
A vehicle such as a motorcycle is provided with a hazard circuit for simultaneously flashing lamps attached to the front, rear, left and right of the vehicle when an emergency stop is performed (see, for example, Japanese Patent Publication No. 59-9377). Further, some vehicles are provided with a position lamp that is lit in the entire traveling state in the width direction, and in many cases, the position lamp is provided together with the blinker lamp in the blinker (for example, Japanese Patent Publication No. 4). No. 15138).
[0003]
In the vehicle having the hazard, the blinker, and the position indicating lamp as described above, the hazard lamp and the blinker lamp are generally shared by the same lamp. It is driven by a circuit as shown in FIG. In this device, a double switch (hereinafter referred to as SW) is used, so that one circuit SW and two commutators are replaced in FIG. 3 in order to reduce the cost.
[0004]
When a power supply voltage is applied to the hazard blinker relay 51 and its drive circuit is grounded, the relay contact is turned on and off with a preset time constant. The hazard SW 52 and the first position SW 53 are constituted by double switches, and when one is closed, the other is open. In the normal traveling state, the first position SW53 is in the on state, and the movable contact of the blinker SW54 is at the middle point. Therefore, the second position SW55 is in contact with both the fixed contacts R and L. The lamps 60 and 61 are lit. Assuming that the turner SW54 is connected to the L contact because the vehicle turns leftward, the second position SW55 is connected only to the fixed contact R and not connected to the fixed contact L as shown in the figure. It becomes. As a result, the left warning lamp 56 blinks and the left position lamp 60 is turned off. On the other hand, the right-side position lamp 61 is kept on.
[0005]
Next, when the hazard switch 52 is turned on for emergency stop of the vehicle on the road end, the pulse train output from the hazard blinker relay 51 is simultaneously applied to the left and right warning lamps 56, 57 through the diodes 58, 59. The left and right warning lamps 56 and 57 blink simultaneously. At this time, the first position SW 53 is turned off, and the position lamps 60 and 61 are turned off.
[0006]
In the above circuit, it is not necessary to synchronize the winker and the hazard. However, after the vehicle turns around the corner, the winker does not automatically return, which is inconvenient for the driver.
[0007]
On the other hand, a circuit as shown in FIG. 2 of Japanese Patent Publication No. 4-15138 has been proposed as a circuit for automatically returning the winker after cornering. FIG. 4 shows an equivalent circuit obtained by redrawing FIG. 2 of the publication for comparison with FIG. In the figure, the same reference numerals as those in FIG. 3 denote the same or equivalent parts.
[0008]
When the winker SW 77 is connected to the L contact so that the vehicle turns to the left, for example, the win cassette off SW 73 comes into contact with the left set contact. Then, the set signal enters the automatic winker return (automatic winker cancel) circuit 72, whereby the MPU 72a outputs a signal for turning on the transistor 72b. When the transistor 72b is turned on, the drive circuit of the winker relay 71 is grounded, and the winker relay 71 is activated. For this reason, a pulse signal with a predetermined duty is continuously output from the blinker relay 71, and the warning lamp 56 blinks.
[0009]
Next, when the MPU 72a detects that the vehicle has bent the corner by the speed pulse signal from the speedometer 74 or the angle signal from the angle sensor 75, the MPU 72a outputs a signal for turning off the transistor 72b. Then, the drive circuit of the blinker relay 71 is not grounded, and the operation is stopped. As a result, the blinking of the warning lamp 56 automatically stops. The position relay 76 is turned off during normal travel, and its contact is closed. For this reason, the position lamps 60 and 61 are lit regardless of the position of the movable contact of the second position SW55. When the winker is activated, the position relay 76 is turned on and its contact is opened, so that the position lamp that is connected to the blinking blinker lamp is extinguished as described above.
[0010]
However, this circuit has a problem that no special consideration is given to the hazard circuit. FIG. 5 shows a hazard relay added to that shown in FIG. In FIG. 5, 81 is a hazard relay, 82 is a hazard switch, 83 is a synchronous short relay, and other numerals are the same as or equivalent to those in FIGS.
[0011]
In this proposed example, two relays of the blinker relay 71 and the hazard relay 81 are used, and the hazard SW 82 is turned on when the hazard lamp blinks. Then, the drive circuit of the hazard relay 81 is grounded, and the hazard relay 81 outputs a duty pulse train determined by a preset time constant. In addition, the synchronous short relay 83 operates to short-circuit between the two contacts. For this reason, the pulse train output from the hazard relay 81 is simultaneously input to the warning lamps 56 and 57, and the warning lamps 56 and 57 blink simultaneously. The winker automatic return operation is the same as that of FIG.
[0012]
If the hazard is activated when the blinker is activated, and the pulse trains output from the blinker relay 71 and the hazard relay 81 are not synchronized, the warning lamps 56 and 57 do not blink at the scheduled cycle and feel unnatural. The diodes 58 and 59 in FIG. 3 are replaced with a synchronous short relay 83.
[0013]
[Problems to be solved by the invention]
However, in this proposed example, since the synchronous short relay 83 is used, there is a problem that the cost required for realizing the circuit is high, and a problem that the blinker relay 71 and the hazard relay 81 may operate simultaneously. there were.
An object of the present invention is to provide a vehicular direction indicator lighting circuit that solves the problems of the prior art and can be realized with a simple and inexpensive configuration. It is another object of the present invention to provide a vehicular direction indicator lighting circuit that does not require a winker relay and a hazard relay to operate simultaneously and does not need to synchronize with a pulse train output therefrom.
[0014]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention includes a winker relay and a hazard relay with a ground terminal that starts operation when connected between a power source and the ground , and at least two provided on both sides in the width direction of the vehicle. and warning lamp, and turn signal switch for flashing by connecting the winker relay closing engineered side warning lamp, a hazard switch to flash by connecting at least two warning lamps on the hazard relay by closing manipulation In the vehicular direction indicator lighting circuit provided with a load release switch that releases a predetermined resistance load from the power source in conjunction with the closing operation of the hazard switch, the winker relay is connected to the power source via the load release switch. The hazard relay is directly connected to the power source and the ground terminal is connected to the resistance load. It is characterized in that so as to be grounded Te. According to this feature, when one of the winker relay and the hazard relay is operating, the other can be disabled, so that it is not necessary to synchronize the winker relay and the hazard relay.
[0015]
Further, the present invention is the between at least two warning lamps, connecting the two rectifying elements connected to each other cathodes each other in that so as to connect the hazard switch to a cathode connection point of the rectifying element There are features. According to this feature, the circuit can be realized by using an inexpensive rectifying element without using the expensive synchronous short relay included in the circuit of FIG.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention.
In this embodiment, a normally open load release switch (SW) 1 is provided between the power source and the second position SW55, and the hazard relay 81 and the rectifying element, for example, the midpoint of the diodes 58 and 59, are provided. Between the two, a normally open (normally off) hazard switch (SW) 2 is provided. The load releasing SW1 and the hazard SW2 constitute a double switch. Further, the winker SW77, the second position SW55 and the wincassette off SW73 constitute a triple switch. The blinker SW77 is a switch having no contact at the middle point.
[0017]
Further, a power supply terminal of the blinker relay 71 and a ground terminal of the hazard relay 81 are connected to the downstream side of the fixed contact 1a of the load release SW1. The hazard relay 81 is connected to the midpoint of the diodes 58 and 59 through the hazard SW2. 3 to 5 denote the same or equivalent parts as those in FIGS. 3 to 5. Further, the circuit configuration other than the above in FIG. 1 is the same as the circuit configuration in FIG.
[0018]
FIG. 2 is a circuit diagram showing a specific example of the blinker relay 71 and the hazard relay 81. The relays 71 and 81 are composed of an oscillation circuit 21 and a switch unit 22, and the oscillation circuit 21 starts to operate when connected to a power source and ground. The oscillation circuit 21 oscillates at a frequency determined by a predetermined time constant, and turns the switch unit 22 on and off. For this reason, a pulse train having a predetermined duty is output from the switch unit 22.
[0019]
Next, the operation of this embodiment will be described with reference to FIG. For example, when the vehicle is going to turn leftward and the winker SW 77 is brought into contact with the L contact, the movable contact of the win cassette off SW 73 comes into contact with the set contact, and the set signal is inputted to the automatic winker return circuit 72. Then, since the MPU 72a outputs a signal for turning on the transistor 72b, the drive circuit of the winker relay 71 is grounded, and the winker relay 71 outputs a pulse train having a predetermined duty. As a result, the pulse train is supplied to the left warning lamp 56, and the warning lamp 56 blinks.
[0020]
When the vehicle goes around the corner, the MPU 72a of the automatic winker return circuit 72 outputs a signal for turning off the transistor 72b based on the speed pulse output from the speedometer 74 and / or the detection signal from the angle sensor 75. As a result, the operation of the blinker relay 71 is automatically stopped. It is obvious that the same operation as described above is performed even when the vehicle operates the blinker to turn right.
[0021]
When the driver pushes the win cassette off SW 73 in the direction of arrow a by hand and brings the movable contact into contact with the off contact, the off signal enters the automatic winker return circuit 72, and the MPU 72a turns off the transistor 72b. In this way, the winker can be restored manually. The position relay 76 is turned off during normal travel, and its contact is closed. For this reason, the position lamps 60 and 61 are lit regardless of the position of the movable contact of the second position SW55. When the winker is activated, the position relay 76 is turned on and the contact thereof is opened, so that the position lamp provided along with the blinking blinker lamp is extinguished as described above.
[0022]
Next, when the hazard is turned on, the load release SW1 is turned off and the hazard SW2 is turned on. Then, since the load release SW1 is turned off, the blinker relay 71 is disconnected from the power source and stops operating. Further, the supply of power to the position lamps 60 and 61 is cut off. Therefore, the blinker blinking and the position lamps 60 and 61 are turned off. On the other hand, the drive circuit of the hazard relay 81 is grounded via the second position SW 55 and the position lamp 60 or 61. For this reason, the hazard relay 81 operates and outputs a pulse train having a predetermined duty. The pulse train passes through the diodes 58 and 59 via the hazard SW2 and is simultaneously supplied to the left and right warning lamps 56 and 57. As a result, the warning lamps 56 and 57 blink.
[0023]
According to the present embodiment, since the diodes 58 and 59 are used instead of the synchronous short relay 83 as in the proposed circuit of FIG. 5, the circuit can be configured easily and inexpensively. Further, when the hazard is turned on while the blinker is being operated, the load release SW1 is turned off as described above, so that the blinker relay 71 is disconnected from the power source and stops operating. Further, the supply of power to the position lamps 60 and 61 is cut off. Therefore, the blinker blinking and the position lamps 60 and 61 are turned off. On the other hand, since the hazard relay 81 operates and the left and right warning lamps 56 and 57 are energized simultaneously through the hazard switch SW2 and the diodes 58 and 59, it is not necessary to synchronize blinking of the blinker and blinking of the hazard. In addition, it could be realized without increasing the number of interlocking switch circuits.
[0024]
【The invention's effect】
As is apparent from the above description, according to the invention of claim 1, when one of the winker relay and the hazard relay is operating, the effect that the other can be completely disabled, and for this reason, There is an effect that it is not necessary to synchronize the blinker relay and the hazard relay.
[0025]
Further, according to the invention of claim 2, the position lamp is released from the power source and turned off in conjunction with the closing operation of the hazard switch, so that the blinking of at least two warning lamps on the left and right can be clearly seen. effective.
[0026]
According to the invention of claim 3, since the expensive synchronous short relay is removed and two inexpensive rectifying elements having cathodes connected to each other are connected between at least two warning lamps, the cost is low. It is possible to provide a vehicle direction indicator lighting circuit.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention.
FIG. 2 is a circuit diagram showing a specific example of a blinker relay and a hazard relay.
FIG. 3 is a circuit diagram showing an example of a conventional winker hazard circuit.
FIG. 4 is a circuit diagram showing an example of a conventional winker circuit with an automatic return function.
FIG. 5 is a circuit diagram showing an example of a conventional blinker circuit with a hazard function.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Load release SW, 2 ... Hazard SW, 55 ... 2nd position SW, 56, 57 ... Warning lamp, 58, 59 ... Diode, 60, 61 ... Position lamp, 71 ... Winker relay, 72 ... Automatic winker return circuit 73 ... Win cassette off SW, 74 ... Speedometer, 75 ... Angle sensor, 76 ... Synchronous short relay, 77 ... Winker SW, 81 ... Hazard relay.

Claims (3)

A winker relay and hazard relay with a ground terminal that starts operation when connected between the power source and the ground , at least two warning lamps provided on both sides in the width direction of the vehicle, and a warning lamp on the closed side a winker switch for flashing by connecting the winker relay, a hazard switch to flash by connecting at least two warning lamps on the hazard relay by closing manipulation, given in conjunction with the closing operation of the hazard switch In the vehicular direction indicator lighting circuit having a load release switch for releasing the resistive load from the power source,
The vehicle direction indicator lighting circuit, wherein the winker relay is connected to a power source via the load release switch, and the hazard relay is directly connected to the power source and a ground terminal is grounded via the resistance load. . In the vehicle direction indicator lighting circuit according to claim 1,
The vehicle direction indicator lighting circuit, wherein the predetermined load is a position lamp. In the vehicle direction indicator lighting circuit according to claim 1 or 2,
Two rectifying elements having cathodes connected to each other are connected between the at least two warning lamps, and the hazard switch is connected to a cathode connection point of the rectifying elements. Lighting circuit.

Images