JPH0721439U - Hazard lamp lighting circuit - Google Patents

Abstract

(57) [Abstract] [Purpose] When one side of the hazard lamp is broken, the driver of the vehicle approaching from the rear and other people around will not be mistakenly recognized and safety will be improved. [Configuration] A disconnection detection circuit and a prohibition circuit for prohibiting blinking of the lamp are provided, and when the disconnection detection circuit detects a disconnection of the lamp on one side, the prohibition circuit is provided at a symmetrical position with respect to a plane perpendicular to the axle due to its detection output. The blinking of the lamp on the opposite side is prohibited.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is used as a lighting circuit for a hazard lamp that is used when a car stops on the road.

[0002]

[Prior art]

 The hazard lamp lighting circuit is a circuit that is operated by the driver when the vehicle stops in an emergency on the road, etc., and the hazard lamps provided on the vehicle side are repeatedly blinked all at once. In many vehicles, hazard lamps do not have to be provided with special lamps, but the flasher lamps flash simultaneously on the left and right at a fixed cycle to display hazards.

[0003]

[Problems to be solved by the device]

 The hazard lamp has the meaning as a hazard display only by blinking simultaneously on the left and right, and if one side of the hazard lamp does not light due to disconnection or poor connection, the hazard display is not displayed. Especially in the left-hand traffic area (Japan), when the left hazard lamp is burnt out, only the right hazard lamp blinks periodically. Will be mistaken for indicating that they are willing to take off.

The present invention has been made against such a background, and when one side of a hazard lamp is broken, it does not give a false impression to a driver of a vehicle approaching from the rear or other people around. An object is to provide a hazard lighting circuit. The present invention aims to improve road safety.

[0005]

[Means for Solving the Problems]

 The present invention relates to a lighting circuit for a hazard lamp.A disconnection detection circuit for detecting a disconnection of a lamp on one side, and a detection output of the disconnection detection circuit are arranged symmetrically with respect to a plane perpendicular to the axle with respect to the one side lamp. And a prohibition circuit for prohibiting the blinking of the lamp on the opposite side.

“One side” is on the left side in the left-hand traffic area (Japan), and on the right side for vehicles exported to the right-hand traffic area (Eurasia, Americas, etc.).

[0007]

[Action]

 When the burnout detection circuit detects a burnout of the lamp, it prohibits the flashing of the lamp at the symmetrical position of the lamp to extinguish it, or forcibly puts the lamp at the symmetrical position into the continuous lighting state.

As a result, the driver of the following vehicle and the surrounding people will not mistakenly recognize the hazard as a right turn signal or a start display.

[0009]

【Example】

 Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 is a diagram showing a circuit configuration of a first embodiment of the present invention.

In the first embodiment of the present invention, a flasher unit 1, a disconnection detection circuit 2 for detecting a disconnection of a lamp on one side, and a detection output of the disconnection detection circuit 2 makes the lamp on one side perpendicular to an axle. A forbidden circuit 3 for prohibiting blinking of the lamp on the opposite side provided at a symmetrical position with respect to another plane.

The flasher unit 1 is connected with a turn signal switch 4, a hazard switch 5, a front left flasher lamp 6, a front right flasher lamp 7, a rear left flasher relay 8 and a rear right flasher relay 9, and a rear part. A rear left flasher lamp 11 is connected between the left flasher relay 8, the power supply 10 and the power supply 10, and a rear right flasher lamp 12 is connected between the rear right flasher relay 9 and the power supply 10.

Further, a prohibition circuit 3 and a disconnection detection circuit 2 are connected between the hazard output terminal 1 a of the flasher unit 1 and the power source 10, and the rear left flasher output terminal 1 b is connected via the rear left flasher relay 8 to the rear portion. The left flasher lamp 11 is connected, and the rear right flasher lamp 12 is connected to the rear right flasher output terminal 1c via the rear right flasher relay 9.

A front left flasher lamp 6 is connected to the front left flasher output terminal 1d of the flasher unit 1, and a front right flasher lamp 7 is connected to the front right flasher output terminal 1e.

The prohibiting circuit 3 is configured to be in a closed state when a voltage is not applied to the exciting coil 3a and to be in an open state when a voltage is applied.

The rear left flasher lamp 11 and the rear right flasher lamp 12 are arranged at positions shown in FIG. 3 as an example.

Next, the operation of the first embodiment of the present invention thus constructed will be described.

In the normal direction indicating operation, when the direction indicator switch 4 is operated to the left or right, the flasher unit 1 includes the front left flasher output terminal 1d and the rear left flasher output terminal 1b or the front right side. Direction output is sent from the flasher output terminal 1e and the rear right flasher output terminal 1c to blink the front left flasher lamp 6 or the front right flasher lamp 7 and excite the coil 8a of the rear left flasher relay 8. The switch 8b is closed to flash the rear left flasher lamp 11, or the exciting coil 9a of the rear right flasher relay 9 is excited to close the switch 9b and the rear right flasher lamp 12 is flashed.

Next, the hazard display operation in a normal state will be described. When the hazard switch 5 is operated, the flasher unit 1 simultaneously outputs a hazard display output from the hazard output terminal 1a, the front left flasher output terminal 1d, and the front right flasher output terminal 1e, respectively. At this time, no voltage is applied to the exciting coil 3a of the prohibiting circuit 3 from the disconnection detecting circuit 2 because the rear left flasher lamp 11 is normal. Therefore, the switch 3b is in the closed state, and the output from the hazard output terminal 1a excites the exciting coils 8a and 9a of the rear left flasher relay 8 and the rear right flasher relay 9 to close the switches 8b and 9b. As a result, the voltage from the power source 10 is applied to the rear left flasher lamp 11 and the rear right flasher lamp 12 to blink. At the same time, the flasher unit 1 also outputs a hazard display output from the front left flasher output terminal 1d and the front right flasher output terminal 1e, and blinks the front left flasher lamp 6 and the front right flasher lamp 7.

The operation when the rear left flasher lamp 11 which is a feature of the present invention is in a broken state will be described.

The disconnection detection circuit 2 always outputs an AC signal from the terminals 2a and 2b, and a loop circuit is formed between the terminals 2a and 2b via the two capacitors 13 and the rear left flasher lamp 11. When the rear left flasher lamp 11 is broken, a voltage is applied to the prohibiting circuit 3 from the terminal 2c. By applying this voltage, the exciting coil 3a of the prohibiting circuit 3 is excited and the switch 3b is opened.

When the switch 3b is opened, even if the hazard switch 5 is operated, the output from the hazard output terminal 1a of the flasher unit 1 is cut off, and the exciting current to the coil 9a of the rear right flasher relay 9 disappears. Therefore, the switch 9b is opened and the rear right side flasher lamp 12 is turned off and the blinking is prohibited. When the rear right flasher lamp 12 is burnt out, it does not blink because there is no light and no hazard display is displayed. At this time, the front left-side flasher lamp 6 and the front right-side flasher lamp 7 are blinked, but the blinking does not directly go into the sight of the driver of the vehicle approaching from the rear, so it is not mistakenly recognized.

Second Embodiment FIG. 2 is a diagram showing a circuit configuration of a second embodiment of the present invention. The second embodiment of the present invention is connected so that the output from the terminal 2c of the disconnection detection circuit 2 to the prohibition circuit 3 in the first embodiment is branched and supplied to the rear left flasher relay 8 and the rear right flasher relay 9. Others are the same as those in the first embodiment.

In the case of the second embodiment, when the rear left flasher lamp 11 is disconnected, a voltage is applied to the prohibiting circuit 3 from the terminal 2c, the exciting coil 3a is excited and the switch 3b is opened, and the hazard switch 5 is opened. Even if is operated, the output from the hazard output terminal 1a of the flasher unit 1 is cut off.

On the other hand, the output from the terminal 2c excites the exciting coil 8a of the rear left flasher relay 8 and the exciting coil 9a of the rear right flasher relay 9 to close the switches 8b and 9b, respectively.

Since the rear left flasher lamp 11 is broken, the switch 8b of the rear left flasher relay 8 is not turned on even when the switch 8b is closed, but the rear right flasher lamp 12 is the switch 9b of the rear right flasher relay 9. When is closed, it receives current from the power supply 10 and continues to light without blinking.

With this operation, when the rear left flasher lamp 11 is disconnected, even if a hazard display operation is performed, the rear right flasher lamp 12 is forcibly prevented from blinking, and is turned off or turned on. Since it is continued, it is possible to prevent the driver and the surroundings of the following vehicle from recognizing it as a right turn signal or a start display due to the hazard display.

Although this embodiment has been described for the left-hand side traffic area such as Japan, in the case of the right-hand side traffic area, the disconnection detection circuit and the prohibition circuit 3 are provided on the rear right flasher lamp 12 side. By this, the same operation can be performed.

[0029]

[Effect of device]

 As described above, according to the present invention, when one side of the hazard lamp is broken, the driver of the vehicle approaching from the rear is forced to blink the lamp on the other side so as not to mislead the driver and other surroundings. It has the effect of prohibiting and improving the safety on the road.

[Brief description of drawings]

FIG. 1 is a diagram showing a circuit configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a circuit configuration of a second embodiment of the present invention.

FIG. 3 is a view showing an example of mounting a rear flasher lamp in the first embodiment and the second embodiment of the present invention.

[Explanation of symbols]

 1 Flasher unit 1a Hazard output terminal 1b Rear left flasher output terminal 1c Rear right flasher output terminal 1d Front left flasher output terminal 1e Front right flasher output terminal 2 Disconnection detection circuit 2a, 2b, 2c Terminal 3 Prohibited circuit 3a, 8a, 9a Excitation coil 3b, 8b, 9b Switch 4 Direction indicator switch 5 Hazard switch 6 Front left flasher lamp 7 Front right flasher lamp 8 Rear left flasher relay 9 Rear right flasher relay 10 Power supply 11 Rear left flasher lamp 12 Rear right flasher Lamp 13 condenser

Claims (2)

[Scope of utility model registration request] 1. A disconnection detection circuit for detecting a disconnection of a lamp on one side, and a disconnection detection circuit for a lamp on the opposite side provided at a symmetrical position with respect to a plane perpendicular to the axle with respect to the one side lamp by a detection output of the disconnection detection circuit. A hazard lamp lighting circuit comprising a prohibition circuit for prohibiting blinking. 2. The hazard lamp lighting circuit according to claim 1, wherein one side is a left side of a vehicle used in a left-hand traffic area.