JPH0668983U - Hazard lamp drive circuit - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a hazard drive circuit for blinking a hazard lamp in an automobile, and by using a simple circuit, the hazard lamp can be reliably activated in parallel with lighting of a stop lamp according to a driver's intention. The purpose is to blink. [Structure] A stop switch that opens and closes in conjunction with a brake, a power supply that supplies drive power to a stop lamp via the stop switch, and a power supplied from the power supply through a hazard switch whose contacts are manually opened and closed. In a hazard lamp drive circuit equipped with a blinking control means for driving the hazard lamp to blink, a rear-end collision prevention device that issues an alarm indicating the risk of rear-end collision according to the distance between running vehicles with respect to a predetermined threshold, and the rear-end collision prevention. A detour forming means for monitoring an alarm issued by a device and a state of a contact of the stop switch, and forming a drive power supply path for the blinking control means in accordance with a result of the monitoring. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hazard drive circuit that blinks a hazard lamp in an automobile.

[0002]

[Prior art]

 For passenger cars and other automobiles, for example, when a vehicle breaks down while traveling and is parked on the road, the four front and rear direction indicator flashers are made to flash at the same time, so that the vehicle traveling in front of and behind the automobile is hit by another vehicle. Promote the prevention of the danger of.

The four direction indicator flashers that blink in this manner are called hazard lamps (emergency blinking indicator lights), and are a hazard circuit driven by the electric power supplied through the contacts of the hazard switch operated by the driver. Blinks under the control of (blink control means).

[0004]

[Problems to be solved by the device]

 By the way, such conventional hazard lamps are not normally required to be used while blinking while the vehicle is running, and they are blinking only in accordance with the operation of the hazard switch.

However, in recent years, particularly in an automobile running on an expressway, for example, when a frontward traffic jam is detected and the brake pedal is suddenly depressed, a vehicle running before and after the automobile is decelerating. It is required to use a stop lamp (braking light) and a hazard lamp together in order to reliably notify that the situation is such that a traffic accident and the driver must manually open and close the hazard switch during deceleration. There wasn't.

Further, as a conventional example corresponding to the above-mentioned request, the deceleration exceeds a predetermined value or both the deceleration and the traveling speed exceed a predetermined value while the brake is being pressed. There is a device that blinks a hazard lamp when it is detected (Japanese Utility Model Publication No. 60-175739, Japanese Utility Model Publication No. 1-142336). However, all of these methods have complicated configurations, and the start and end timings of blinking the hazard lamps are not always the driver's will.

An object of the present invention is to reliably blink a hazard lamp in parallel with lighting of a stop lamp according to a driver's intention by using a simple circuit.

[0008]

[Means for Solving the Problems]

 The present invention provides a stop switch that opens and closes in conjunction with a brake, a power supply that supplies drive power to a stop lamp through the stop switch, and a hazard switch that has contacts that are manually opened and closed. In a hazard lamp drive circuit equipped with a blinking control unit that is driven by electric power to blink a hazard lamp, a rear-end collision prevention device that issues a warning indicating the risk of rear-end collision in accordance with the distance between vehicles running against a predetermined threshold value. And a detour forming means for monitoring the alarm issued by the rear-end collision prevention device and the state of the contact of the stop switch, and forming a drive power supply path to the blinking control means according to the result of the monitoring. It is characterized by having.

[0009]

[Action]

 In the hazard lamp drive circuit according to the present invention, the detour forming means is composed of a simple relay circuit from the stop switch to the blinking control means, the brake is applied to close the contact of the stop switch, and the rear-end collision prevention device is provided. When the alarm is output from the alarm switch, even if the contact of the hazard switch is opened, it forms a drive power supply path to the blinking control means, and conversely, it is lacking in either of these two conditions. And such a supply path is released.

That is, such a power supply path is interrupted by the detour forming means having a simple structure according to the intention of the driver to apply the brake, and the blinking control means is connected via such a supply path. Since the hazard lamps are blinked by being driven according to the supplied electric power, it is possible to reliably notify the vehicle traveling in the front and rear that the vehicle is decelerating or stopped.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

In the figure, the cathode terminal of the battery 11 which is a power source is grounded, and the anode terminal of the battery 11 is connected to one contact of the stop switch 12 and the hazard switch 13. The other contact of the stop switch 12 is connected to one terminal of a changeover switch 14 and a stop lamp 15, and the other contact of the changeover switch 14 is connected to one input terminal of a relay 16 which forms a bypass circuit together with the switch. Connected. The other terminal of the stop lamp 15 and the other input terminal of the relay 16 are grounded. The alarm output of the rear-end collision prevention device 17 is connected to one contact of the relay 16, and the other contact of the relay 16 and the hazard switch 13 is connected to a hazard lamp via a hazard circuit 18 which is a blinking control means.

In the hazard lamp drive circuit having such a configuration, the contact point of the changeover switch 14 is opened according to the operation of the driver while traveling on a general road, and the conventional hazard lamp drive circuit which does not include the detour forming means. Works in the same way as. In such a case, the stop lamp 15 is turned on by the electric power supplied from the battery 11 via the stop switch 12 whose contacts are closed when the driver depresses the brake pedal. Further, the hazard circuit 18 is driven by the electric power supplied from the battery 11 via the contact of the hazard switch 13 manually operated by the driver to blink the hazard lamp.

However, the contact of the changeover switch 14 is closed, for example, according to an operation performed by the driver when traveling on a highway. Therefore, when the brake pedal is depressed, the stop lamp 15 is driven by the electric power supplied from the battery 11 via the stop switch 12 and lights up, and the relay 16 is driven from the battery 11 via the stop switch 12 and the changeover switch 14. Excited by the supplied power, the relay 16 further connects the alarm output of the rear-end collision prevention device 17 to the power supply terminal of the hazard circuit 18. Such a rear-end collision prevention device 17 outputs an alarm signal when it detects that the traveling speed and deceleration are higher than a predetermined upper limit value and the front-rear distance is shorter than a predetermined lower limit value. The signal is supplied as drive power to the hazard circuit 18 via the contact of the relay 16. Therefore, the hazard circuit 18 is driven even if the contact of the hazard switch 13 is opened to blink the hazard lamp.

As described above, according to this embodiment, in a vehicle equipped with a rear-end collision prevention device, a stop lamp is used in accordance with the driver's intention to step on the brake pedal by using a simple circuit including the relay 16 and the changeover switch 14. 15 can be turned on and the hazard lamp can be turned on reliably and automatically.

In the present embodiment, the relay 16 is driven by the electric power supplied from the battery 11 via the stop switch 12 to supply the driving electric power to the hazard circuit 18. The method is not limited, and, for example, a switching element such as a transistor, a photocoupler, or the like may be arranged in place of the relay, or a similar switching element may be used in place of the hazard switch 13, and the element may be used as a contact of the stop switch 12. A circuit for forcibly controlling the intermittent operation in conjunction with opening and closing may be added.

Further, in the present embodiment, the relay 16 is driven by the electric power directly supplied from the battery 11 via the stop switch 12, but the present invention is not limited to such a method, and for example, a stop A double pole double throw switch may be adopted as the switch 12, one contact may be used as usual, and the relay 16 may be driven via the other contact.

Further, in the present embodiment, the hazard circuit 18 is directly driven by the power of the warning signal output from the rear-end collision prevention device 17, but the present invention is not limited to such a method, and for example, Using a circuit for driving and controlling the relay 16 according to the combination of the above-mentioned alarm signal and the contact state of the stop switch 12, and supplying the driving power from the battery 11 to the hazard circuit 18 via the contact of the relay 16 You may form a way.

[0019]

[Effect of device]

 As described above, in the present invention, by using a simple circuit, the hazard lamp is automatically blinked in parallel with the lighting of the stop lamp at the time of deceleration or stop at the timing faithful to the driver's intention. .

Therefore, in the vehicle to which the present invention is applied, the operability can be improved and the hazard lamps can be made to blink with certainty, and the performance and safety during traveling can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Explanation of symbols]

 11 Battery 12 Stop Switch 13 Hazard Switch 14 Changeover Switch 15 Stop Lamp 16 Relay 17 Rear-end Collision Prevention Device 18 Hazard Circuit

Claims (1)

[Scope of utility model registration request] 1. A stop switch that opens and closes in conjunction with a brake, a power supply that supplies drive power to a stop lamp through the stop switch, and a power supply that supplies power from a power switch through a hazard switch whose contacts are manually opened and closed. In a hazard lamp drive circuit having a blinking control means for blinking a hazard lamp driven by electric power, a rear-end collision prevention device that issues an alarm indicating the risk of rear-end collision according to the distance between vehicles during traveling with respect to a predetermined threshold value, and A detour forming means for monitoring an alarm issued by a rear-end collision prevention device and a contact state of the stop switch, and forming a drive power supply path for the blinking control means in accordance with a result of the monitoring. Hazard lamp drive circuit characterized by.