JPH0675891U - Cornering lamp lighting circuit - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a cornering lighting circuit in which a cornering lamp does not light when a hazard switch is operated. [Constitution] In the cornering lamp lighting circuits 30 and 30A for converting the blinking signals S1 and S11 for blinking turn signal lamps provided on the left and right of the vehicle into lighting signals and turning on the left and right cornering lamps 10 and 10A respectively, the left turn Blinking signal S11 for the left to blink the signal lamp
And a left blinking signal S1 that blinks the right turn signal lamp at the same time, a prohibiting circuit including transistors 45 and 65 for prohibiting the turning of the left and right cornering lamps 10 and 10A is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cornering lamp lighting circuit for lighting a cornering lamp.

[0002]

[Prior art]

 Conventionally, the cornering lamp 1, the turn signal lamp 2, the small lamp 3, etc. are electrically connected to the control circuit 4 provided on the instrument panel by the vehicle harness 5 as shown in FIG. Each of the lamps 1 to 3 is turned on, blinked, and turned off by a signal.

Incidentally, there are cases where the cornering lamp 1 is retrofitted, and in such a case, a new vehicle harness has to be passed through the vehicle body in order to connect the cornering lamp 1 and the control circuit 4, which is a troublesome work. .

Therefore, it has been proposed that a cornering lighting circuit is provided in the housing of the lamp, and the cornering lamp is lit by the blinking signal of the turn signal lamp 2 by the cornering lighting circuit.

[0005]

[Problems to be solved by the device]

 However, in such a cornering lighting circuit, when the hazard switch (not shown) is operated, only the left and right turn signal lamps 2 need to blink. There was a problem that the cornering lamp 1 also lights up in addition to the blinking of.

The present invention has been made in view of the above problems, and an object thereof is to provide a cornering lighting circuit in which a cornering lamp does not light up when a hazard switch is operated.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention converts a blinking signal for blinking turn signal lamps provided on the left and right sides of a vehicle into a lighting signal to turn on the left and right cornering lamps respectively. When a left blinking signal that blinks the turn signal lamp and a left blinking signal that blinks the right turn signal lamp are emitted at the same time, a prohibition circuit is provided to prohibit the turning of the left and right cornering lamps. Characterize.

[0008]

[Action]

 In this invention, when the hazard switch is operated and the left and right blinking signals for blinking the left and right turn signal lamps are output at the same time, the prohibition circuit prohibits the turning of the left and right cornering lamps.

[0009]

【Example】

 An embodiment of a cornering lighting circuit according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 10 is a right cornering lamp, 12 is a turn signal lamp, 13 is a small lamp, and 14 is a headlight.

The cornering lamp 10 includes a housing 21 having a bulb 20 and a lens 22 attached to the front opening of the housing. A case 30 for a circuit is integrally attached to the housing 21.

Similarly, the left cornering lamp 10A has a similar structure, and a housing 30A is integrally attached to a housing (not shown).

Reference numeral 23 is a socket in which the bulb 20 is mounted, and 24 is an electric power supply line for supplying electric power to the bulb 20, which is connected to the small lamp 13. Reference numeral 25 is a signal input line connected to a signal line (not shown) of the turn signal lamp 12, 26 and 27 are a lighting circuit 40 described later provided in the case 30 and a lighting circuit 60 described later provided in the case 30A. Connected conductor.

A circuit board (not shown) is provided in each of the cases 30 and 30A. As shown in FIG. 3, the circuit board turns on the valve 20 in response to a blinking signal for blinking the turn signal lamp 12. Lighting circuits 40 and 60 are provided.

The lighting circuit 40 smoothes the power transistor (power MOS FET) 41 connected in series with the bulb 20 and the blinking signal S 1 input to the signal input line 25 to the gate 41 G of the power transistor 41. And a smoothing circuit 42 for inputting. The smoothing circuit 42 is composed of a diode 43, a capacitor 44, resistors R1 to R4 and the like.

When the smoothed signal S2 smoothed by the smoothing circuit 42 is input to the gate 41G of the power transistor 41, the power transistor 41 becomes conductive and the bulb 20 is turned on. That is, the cornering lamp 10 is lit while the turn signal lamp 12 is blinking. The lighting circuit 60 has the same configuration as that described above, and therefore its description is omitted.

A transistor 45 for setting the gate potential to the ground potential is connected to the gate 41G of the power transistor 41. The base of the transistor 45 is grounded via the resistor R5, and the resistor R6 and the diode 46 are connected. The series circuit of is connected. Further, the anode of the diode 46 is connected to the capacitor 64 of the lighting circuit 60, and when the capacitor 64 is charged by the blinking signal S11 and reaches a predetermined potential, the transistor 45 becomes conductive.

Similarly, the transistor 65 is also connected to the gate 61G of the power transistor 61 of the lighting circuit 60, the base of the transistor 65 is grounded via the resistor R25, and the resistor R16 and the diode 66 are connected in series. The circuit is connected. Further, the anode of the diode 66 is connected to the capacitor 44 of the lighting circuit 40, and when the capacitor 44 is charged by the blinking signal S1 and reaches a predetermined potential, the transistor 65 becomes conductive. The transistors 45 and 65, the resistors R5, R6, R16 and R25, the diodes 46 and 66, and the like form an inhibition circuit.

Next, the operation of the cornering lighting circuit of the above embodiment will be described.

When the blinking signal S1 is inputted to the signal input line 25, the blinking signal S1 is smoothed by the smoothing circuit 42 to become a smoothing signal S2, and this smoothing signal S2 is inputted to the gate 41G of the power transistor 41 to turn on the power transistor 41. Make it conductive. The cornering lamp 10 is turned on by the conduction of the power transistor 41.

The capacitor 44 is charged by the input of the blinking signal S1, and the potential of the capacitor 44 becomes high. Since this potential is applied to the base of the transistor 65 via the diode 66 and the resistor R16, the transistor 65 becomes conductive, the gate 61G of the power transistor 61 is grounded, and the power transistor 61 is forcibly turned off.

When the blinking signal S11 is input to the signal line 25A, the blinking signal S11 is smoothed by the smoothing circuit 62 to become a smoothing signal S12 in the same manner as described above. The smoothing signal S12 causes the power transistor 65 to conduct and the cornering lamp 10A to operate. Light. Since the capacitor 44 is charged by the input of the flashing signal S11, the potential of the capacitor 44 becomes high. Therefore, the transistor 65 is turned on, the gate 41G of the power transistor 41 is grounded, and the power transistor 41 is forcibly turned off. To be done.

When the blinking signals S1 and S11 are input to the signal lines 25 and 25A at the same time, both capacitors 44 and 64 are charged to have a high potential, so that the transistors 45 and 65 are turned on. As a result, the power transistors 41 and 61 are forcibly turned off, and the cornering lamps 10 and 10A are not turned on.

That is, when the blinking signals S1 and S11 are simultaneously output by operating a hazard switch (not shown), the turn signal lamps 12 and 12A blink, but the cornering lamps 10 and 10A do not light. .

FIG. 4 shows another embodiment. In this embodiment, the number of the lead wires 99 connecting the lighting circuit 70 and the lighting circuit 100 is one.

In FIG. 4, the lighting circuit 70 includes transistors T1, T2, T3, a diode D1, resistors R31 to R37, etc. in addition to the smoothing circuit. Similarly, the lighting circuit 100 is composed of transistors T41, T42, T43, a diode D41, resistors R31 to R37, etc. in addition to the smoothing circuit. The K1 point of the lighting circuit 70 and the K2 point of the lighting circuit 100 are connected by a conductor 99.

Next, the operation of the above embodiment will be described.

When the small lamps 13, 13 are lit, the voltage of the small lamp is applied to the base of the transistor T2 of the lighting circuit 70 via the diode D1 and the resistor R34, so that the transistor T2 becomes conductive and the resistors R31, R32. , And current flows in the series circuit of R33. Similarly, the transistor T42 of the lighting circuit 100 becomes conductive, and a current flows through the series circuit of the resistors R41, R42, R43. The potentials at points K1 and K2 are set to be about 7 volts.

In these states, since the gates 41G and 61G of the power transistors 41 and 61 are set to zero potential due to the conduction of the transistors T2 and T42, the power transistors 41 and 61 are turned off and the cornering lamps 10 and 10A are not turned on.

Then, in this state, when the blinking signal S1 is input to the signal input line 25, the smoothing circuit 42 smoothes the blinking signal S1 into a smoothed signal S2. This smoothing signal S2 turns on the transistor T1 and turns off the transistor T2. When the transistor T2 is turned off, a current flows through the base of the transistor T3 and the transistor T3 becomes conductive. Due to the conduction of the transistor T3, a current flows through the resistor R35, and the potential at the point N1 becomes a low potential V1 (set to about 6 volts).

The potential V1 causes the potential of the gate 41G to be a low potential for turning off the power transistor 41, but the point K1 of the lighting circuit 70 and the point K2 of the lighting circuit 100 are connected by the conductor 99. Since the potential of the K2 point of the lighting circuit 100 is kept at 7 volts, the potential of the gate 41G is kept at a high potential (about 4 volts), the power transistor 41 is turned on, and the cornering lamp 10 is turned on. Becomes

Similarly, if the blinking signal S11 is input only to the signal input line 25A, the power transistor 61 is turned on and the cornering lamp 10A is turned on.

When the blinking signals S1 and S11 are simultaneously input to the signal input lines 25 and 25A, the N1 point of the lighting circuit 70 and the N2 point of the lighting circuit 100 have a low potential V1 (about 6 volts). This potential V1 causes the potentials at points K1 and K2 to become even lower (about 4 volts), and the gates 41G and 61G of the power transistors 41 and 61 become lower (about 1.5 volts). As a result, the power transistors 41 and 61 are turned off, and the cornering lamps 10 and 10A are not turned on.

In this embodiment, the transistor T3, the diode D1, the resistors R31 to R33, R35, the transistor T43, the diode D41, and the resistors 41 to R43, R45 form an inhibition circuit.

[0035]

[Effect of device]

 According to this invention, when the turn signal lamp's left flashing signal and the right flashing signal are simultaneously emitted, a prohibiting circuit is provided to prohibit the turning of the left and right cornering lamps. When the left and right blinking signals are output simultaneously by operating the hazard switch, the left and right turn signal lamps blink, but the left and right cornering lamps do not light.

[Brief description of drawings]

FIG. 1 is a perspective view showing a vehicle body to which a lighting circuit according to the present invention is applied.

FIG. 2 is a perspective view showing a cornering lamp.

FIG. 3 is a circuit diagram showing a configuration of a lighting circuit.

FIG. 4 is a circuit diagram showing a lighting circuit of another embodiment.

FIG. 5 is a perspective view showing a vehicle body for explaining conventional problems.

[Explanation of symbols]

 10 Cornering lamp 10A Cornering lamp 12 Turn signal lamp 30,30A Lighting circuit 45 Transistor 65 Transistor

Claims (1)

[Scope of utility model registration request] 1. In a cornering lamp lighting circuit for converting a flashing signal for flashing turn signal lamps provided on the left and right of a vehicle into a lighting signal to light the left and right cornering lamps respectively, a left turn signal lamp for flashing is used for the left. A cornering lamp lighting circuit, comprising a prohibiting circuit for prohibiting lighting of the left and right cornering lamps when a blinking signal and a left blinking signal for blinking a right turn signal lamp are simultaneously issued.