JPS6277252A - Cornering lamp system for vehicle - Google Patents

Abstract

PURPOSE:To stop the illumination direction of a lamp at the front position while the lamp is turned off and improve the durability of the whole system by making the illumination of the lamp variable only while the lamp is turned on and constituting the lamp to direct the front while it is turned off. CONSTITUTION:The level condition of the pulse signal sent from output terminals 17, 18 of a photosensor 1 in response to the handle steering angle is processed by an AND gate 26 or 27. Next, it is converted into a count value of the increase/decrease of the illumination direction change by an UP/DOWN counter 28 to select the output terminal of a decoder/driver 29, and a DC motor 39 is rotated in the positive or reverse direction to change the illumination direction of a lamp. Then, when a lighting switch 54 is turned off to turn the lamp off, one side level of the signal input to a GATE 30 circuit is simultaneously made zero. Thereby, the illumination direction of the lamp is returned to the front and stopped. When the switch 54 is turned on to light the lamp, the illumination direction of the lamp is immediately changed in response to steering, thus allowing safety during the travel at night.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cornering lamp system for a vehicle that changes the direction of illumination of a lighting means in conjunction with steering wheel steering.

[Conventional technology]

Vehicles, especially automobiles, are equipped with headlights to illuminate the road ahead at night, but these headlights only illuminate the front of the vehicle in a fixed manner; If this occurs, the direction in which the vehicle is traveling cannot be sufficiently illuminated. When cornering or turning a curve, sufficient illumination is not provided in the direction in which the vehicle is actually traveling, which may pose a danger.

Therefore, in order to improve this kind of problem, conventional methods,
A cornering lamp system has been proposed in which the direction of illumination of headlights is varied in conjunction with the steering wheel operation of a vehicle, and is configured to illuminate the direction of travel.

[Problem that the invention seeks to solve]

However, with such conventional cornering lamp systems, the irradiation direction of the headlights is unnecessarily varied not only when the headlights are turned on but also when they are turned off, in conjunction with the steering wheel operation. The durability of the variable means was reduced.

[Failure to solve the problem]

The present invention has been made in view of these problems, and is configured such that the irradiation direction of the lighting means is varied only when the lighting means is turned on, and when the lighting means is turned off, it is stopped facing the front.

[Effect]

Therefore, according to the present invention, when the light is turned off, the irradiation direction of the lighting means does not change and remains facing the front.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The vehicle cornering lamp system according to the present invention will be described in detail below. FIG. 1 is a circuit diagram showing one embodiment of this cornering lamp system. In the figure, 1 is a photosensor attached to a slit disk (not shown) that is linked to the handle, 2 is a processing circuit that processes the electrical signals sent out by this 7-piece 1, and 3 is this processing circuit 2.
4 is a direct current source, and 5 is a headlamp lighting circuit. 7 Otosensor 1 is a light emitting diode 11. A first photo-interrupter 13 consisting of a phototransistor 12 and resistors R and IR2, and a light emitting diode 14
．． The output terminal 1γ of the photo interrupter 13 and the output terminal 1 of the photo interrupter 16 are connected to the steering wheel of an automobile. In conjunction with steering, Fig. 2 (a) and (b)
A pulsed electrical signal having the same waveform and alternating "1" level and "0" level as shown in FIG. 1 is generated. In other words, rotate the handle clockwise from the neutral point (
By rotating clockwise), an electrical signal in the positive direction centered at Oo is generated, and by rotating counterclockwise (rotating left), an electrical signal in the angular direction centered at 0° is generated. (&) indicates an electrical signal generated at the output terminal 1γ, and (b) indicates an electrical signal generated at the output terminal 18. The electrical signal generated at the output terminal 17 is 90 degrees ahead of the electrical signal generated at the output terminal 18, and when the handle is at the neutral point, that is, at 0 degrees in FIG. The generated electrical signal goes from the rlJ level to the rOJ level, or from the rOJ level to the
The electrical signal generated at the output terminal 1γ is at the falling or rising stage when the level changes to 1.
is in a level state.

On the other hand, the processing circuit 2 is composed of Nant gates 21 and 22, an inverter 23, R and S flip-flop circuits 24 and 25, AND gates 26 and 27, an UP/DOWN counter 28, and a decoder/driver 29. the law of nature,
The R-S flip 70 tube circuits 24 and 25 have negative logic input OR gates 241, 242 and 251, 25.
2. The electrical signal generated at the output terminal 1T of the photosensor 1 is input to one end of the Nant gates 21 and 22 and the reset terminals 24r and 25r of the R/S7 flip-flop circuits 24 and 25. Output terminal 18 of photosensor 1
An electrical signal generated in the NAND gate 26 is inputted to one end of the AND gate 26, the other end of the NAND gate 22, and the inverter 23. The electrical signal inverted and outputted by the inverter 230 is input to the other end of the Nant gate 21 and one end of the AND gate 27. In addition, the outputs of the Nant gates 21 and 22 are input to the set terminals 24 and 25g of the R-S flip-flop circuits 24 and 25, and the outputs of the R-S clip 70 flip-flop circuits 24 and 25 are is Q output terminal 2
AND gates 26 and 27 via 4q and 25q
It is designed to be input to the other end. The outputs of the AND gates 26 and 2γ are applied to the up input terminal 28u and the down input terminal 28 of the UP/DOWN counter 28.
d, and the UP/DOWN kakunta 28 increases or decreases the count value every time a 1-level signal is input to the input terminal 28u or 28d, and changes the count value according to the count value. Decoder/driver 29 outputs digital signals via output terminals 28A to 28D.
The signal is sent to 0 input terminals 29A to 29D. The decoder/driver 29 receives this digital signal, selects a predetermined output terminal from among the output terminals 29a to 29o, and sets the level to rOJ.

That is, at point N in Fig. 2, UP/DOW
The count value in the N counter 28 is set to zero, and at this time the decoder/driver 29 selects the output terminal 29h and sets only the level of this output terminal 29h to the "0" level. There is. And UP/
Each time the count value of the DOWN counter 28 increases by one, the output terminal that becomes the "0" level increases sequentially from 29h to 29g, 29f, . . . -29a. Also, UP/DOWN counter 2
Every time the count value at 8 decreases by 1 from zero,
“The output level from 29h to 29i, which becomes 0 level,
29j...1] -29°, which is 115 degrees. In addition, even in the countdown after the count-up or the count-up after the countdown, "0"
It goes without saying that the output terminal at the level "1" is carried down or carried up to the m-th adjacent output terminal. And output terminals 29a, 29b, 29c, 29d of the decoder/driver 29,
29e.

29f, 29j, 29, 29t, 29rn, 29n
r 29o is inverter 20m, 20b, 2
Nantes Gate 30m, 30b, 30c, 3 via 0e, 20d, 20@, 20r respectively
0d, 30e.

30f. In addition, the output terminals 29 [, 29h and 29f are negative logic human input/negative logic output or game] 30g are connected to one input terminal of the output terminals 29[, 29h and 29f], the Nantes gate 30&~30f and the OR gate 30g.
The other input terminal of is connected to the output terminal 5b of the headlamp lighting circuit 5. The outputs of the Nandt gates 3Oa to 3Qf and the OR gate 30g are connected to the output terminals 21 to 2f and 2g of the processing circuit 2.

Thus, the sliding contacts 34 where the output terminals 21L to 2g of the processing circuit 2 slide into semicircular band-shaped conductor patterns 32 and 33 formed on the sliding board 31 of the lamp drive unit 3
b to 34h, and the sliding contact 34& adjacent to the sliding contact 34b is connected to the positive polarity side of the DC power supply 4 via the coil 351 of the relay 35. Furthermore, the sliding contact 34i adjacent to the sliding contact 34gK is also connected to the positive polarity side of the DC M (source 4) via the coil 361 of the relay 36, and the diode 3 is connected to the coil 351 and 361.
7 and 38 are connected in parallel. The normally open ψ normally closed contacts 35 of the relay 35 are connected to both connection ends of the DC motor 39.
2 and the normally open/normally closed contact 362 of the relay 36 are connected, and when the relay 35 is in the energized state, the common terminal 352C of the normally open/normally closed contact 352 and the normally open contact terminal 352a
The positive polarity side of the DC power source 4 is connected to one end of the DC motor 39.

In addition, when the relay 36 is energized, the common terminal 362C of the normally open/normally closed contact 362 and the normally open contact terminal 36
2a, and the other end of the DC motor 39 is connected to the positive polarity side of the DC power supply 4. That is, the normally open/normally closed contacts 352 and 362 are normally in a conductive state between their common terminals 352C and 362C and the normally closed contact terminals 352b and 362b, and at this time, the DC motor 39
Both ends of are grounded. Then, when DC power is supplied to the DC motor 39 via the normally open/normally closed contacts 352,
The motor rotates the lamp drive shaft 6 clockwise (clockwise rotation in the figure), and as the lamp drive shaft 6 rotates clockwise, the conductor patterns 32 and 33 also rotate clockwise together with the sliding substrate 31. It has become. Furthermore, when DC power is supplied to the DC motor 39 via the normally open/normally closed contacts 362,
The lamp drive shaft 6 rotates counterclockwise.
The conductor patterns 32 and 33 rotate to the left together with the sliding substrate 31 as the slider rotates to the left. It goes without saying that the irradiation direction of the headlight changes by clockwise and counterclockwise rotation of the lamp drive shaft 6, and by clockwise rotation of the lamp drive shaft 6, the headlight irradiation direction changes rotates to the right as seen from the driver's seat,
By rotating the lamp drive shaft 6 to the left, the irradiation direction of the headlight is rotated to the left. A headlamp lighting circuit 5 is connected to the positive power supply line of the lamp drive unit 3 via a connection terminal 3&.

This headlamp lighting circuit 5 includes a low beam lamp 51 and a high beam lamp 52 that constitute a front lamp in parallel,
A dip switch 53 can be used to switch between a low beam lamp 51 and a low beam lamp 52. A lighting switch 54 is connected between the connection point 5a between the low beam lamp 51 and the high beam lamp 52 and the connection terminal 3a of the lamp drive unit 3, and the connection point 5a is the output terminal of the headlamp lighting circuit 5. 5b is also connected.

Next, the operation of the vehicle cornering lamp system configured as described above will be explained. That is, it is assumed that the vehicle is currently traveling straight ahead with the lighting switch 54 closed and the headlights turned on. At this time, the handle is located at the neutral point (point N in FIG. 2), and the count value in the UP/DOWN counter 28 is zero. Therefore, in the decoder/driver 29, only the output terminal 29h is "0".
'' level, and a signal at the ``0'' level is input to one input terminal of the AND gate 30&~30f and the OR gate 30g, respectively. On the other hand, and gate 30
Since the lighting switch 54 is closed at the other input terminal of a1 to 30f and the OR gate 30g,
A signal of 1" level is input, so the output terminals 2&-2f of the processing circuit 2 are at the "1" level, and only the output terminal 2g is at the "0" level. That is, the relays 35 and 36 are not supplied with the t source, the DC motor remains stopped, and the headlight is stopped with the irradiation direction facing forward.

However, if you turn the steering wheel clockwise and start steering to the right from this state, photo interrupters 13 and 1
The electricity sent out by Nant Gate 21 becomes ``1'' and ``0'' level (point a in Figure 2).
The output of OJ changes to the "1" level and the R-S flip-flop circuit 24 is set, and the Q output terminal 24q becomes the "1" level. Then, when the right steering is further performed and the point b in FIG. UP input terminal 2 of UP/DOWN counter 28
A “1” level signal is input to 8u, and the UP/DOWN
The count value in the counter 28 increases by one. As a result, the decoder/driver 29 begins to send out the "0" level signal that it had been sending out from the output terminal 29h to the output terminal 29g. However, since the output terminal 29g is connected to the OR gate 30g like the output terminal 29h, no power is supplied to the motor 39, and the headlight remains stationary with the irradiation direction facing forward. Then, by continuing to steer to the right, the output terminals 17 and 18 of the photosensor 1 become "0" and "1" levels (point 0 in FIG. 2), and the reset terminal 24r of the R/S7 flip-flop circuit 24 becomes If it does not go to the "0" level, the flip-flop is reset and the Q output terminal 24q goes to the "0" level, preparing for the next count. When the point d in FIG. 2 is reached, the output of the Nantes gate 21 changes from the rlJ level to the rOJ level.
9. The R-S flip-flop circuit 24 becomes set state, the Q output driver 24q becomes "1" level again, and when the point e in FIG. 2 is reached, the output of the AND gate 26 becomes "
1'' level, and the count value in the UP/DOWN counter 28 further increases by 1. Due to this increase in count value, the decoder/driver 29 outputs the "0" level signal that had been sent to the output terminal 29.
g and sends it out to the output terminal 29f, and since the two inputs of the Nantes gate 30c are both at the "1" level, the output terminal 2c of the processing circuit 2 is at the rOJ level, and the relay 3
5, the sliding contact 34a and the conductor pattern 32 are attached to the coil 351.
．． Current flows through the path of the sliding contact 34d. By energizing this coil 351, the normally open/normally closed contacts 352
The common terminal 352C and the normally open contact terminal 352a become electrically connected, the DC motor 39 rotates, and the lamp drive shaft 6 rotates clockwise. This clockwise rotation of the lamp drive shaft 6 moves the irradiation direction of the headlight clockwise, and the sliding board 31 connects the conductor patterns 32 and 33 to the sliding contacts 34a to 34.
Rotate clockwise while making sliding contact with 4i. And sliding contact 3
4d separates from the conductor pattern 32, the energization of the coil 351 of the relay 35 is released, and the common terminal 352C of the normally open/normally closed contact 352 and the normally open contact terminal 35
2a becomes non-conductive, and the power supply to the DC motor 39 is cut off. The DC motor 39 rotates a little due to inertia and then stops, and the sliding board 31 stops with the sliding contact 34d disposed approximately in the center of the opposing gap 31a between the conductor patterns 32 and 33. Thereafter, in the same manner, by continuing to steer to the right, the count value in the fi UP/DOWN counter 28 increases sequentially, and the position of the "0" level signal sent by the decoder/driver 29 is at the output terminals 29a, 29d.
. . . 29 &, thereby causing the DC motor 39 to rotate intermittently, and the irradiation direction of the headlight moves clockwise in stages.

Next, the operation when the handle is rotated to the left from the neutral point will be explained. That is, when left/right steering is performed from point N in FIG.
8 both become the "1" level (point f in FIG. 2), the output of the Nant gate 22 becomes the "0" level, the R.S7 lip flop circuit 25 is set, and the Q output terminal 25q
becomes the "1" level. Then, when the point q in FIG. A “1” level signal is input to the down input terminal 28d, and the UP/
The DOWN counter 28 counts down the count value by one. Due to this countdown, the decoder/driver 29 repeatedly lowers the "0" level signal that was being sent out from the output terminal 29h to the output terminal 29i and sends it out.

Then, when the 5th point in FIG.
' level and prepare for the next count. However, the second
When it reaches one point in the figure, the UP/DOWN counter 28
The count value at further counts down by 1,
The position of the "0" level signal sent by the decoder/driver 29 is moved down from the output terminal 291 to the output terminal 29j. This causes the sliding contact 341 conductor pattern 33 to connect to the coil 361 of the relay 36. Current flows through the sliding contact 34e and the output terminal 2d, and the common terminal 36 of the normally open/normally closed contact 362
2c and the normally open contact terminal 362a are not electrically connected, the DC motor 39 rotates, and the lamp drive shaft 6 rotates to the left. Due to this counterclockwise rotation of the lamp drive shaft 6, the irradiation direction of the headlight moves counterclockwise, and the sliding board 31 rotates counterclockwise, the sliding contact 34e separates from the conductor pattern 33, and the relay 36 The energization of the coil 361 is released, the common terminal 362C of the normally open/normally closed contact 362 and the normally open contact terminal 362& become non-conductive, and the power supply to the DC motor 39 is cut off. From this point K, the DC motor 39 rotates slightly due to inertia and then stops. Thereafter, in the same manner, by continuing to steer to the left, the count value in the UP/DOWN counter 28 sequentially decreases, and the decoder/driver 29 sends out [0. The signal position of the rubel is output terminal 29k,
29t...29o, thereby causing the DC motor 39 to rotate intermittently, and the irradiation direction of the front light to move counterclockwise in stages.

In addition, although the above-mentioned operation was explained for right steering from the neutral point and left eP, even in the case of right steering after right steering, or right steering after right steering, UP/
It goes without saying that the count value in the DOWN counter 28 is sequentially counted down or counted up, and the irradiation direction of the headlight changes in accordance with this count value. Further, in this embodiment, the stepwise swing angle of the headlight irradiation direction is set to 10 degrees, so the headlight irradiation direction can be swung left and right by a maximum of 30 degrees each. . In order to obtain such a deflection angle, the sliding contacts 34b to 34h are arranged at equal angular intervals,
Moreover, the interval is sufficient to change the irradiation direction of the headlight 100 times in one step.

As described above, in the cornering lamp system according to the present embodiment, the illumination direction of the headlight can be varied in conjunction with the steering wheel of the automobile when cornering, so that the illumination direction can be illuminated in the direction of travel. safety is ensured.

By the way, the headlights are normally turned off except when driving at night, and at this time the lighting switch 54 is in the open state. When the lighting switch 54 is opened, the AND gates 30a to 30f and the OR game) 30
The "1" level signal is no longer input to the other input terminal of the processing circuit 2, and only the output terminal 2g of the processing circuit 2 becomes the "0" level, and the output terminals 2a to 2f all become the "1" level. Therefore, at the same time that the headlight that had been illuminating the direction of travel is turned off, the illumination direction stops facing forward. On the other hand, the UP/DOWN counter 28 continues counting according to the steering wheel even after the headlights are turned off.
The decoder/driver 29 continues to select the "0" level signal sending position at the output terminals 29a to 29o in accordance with the count value. Therefore, when the lighting switch 54 is next set to the closed state (the headlights are turned on), the irradiation direction of the headlights quickly rotates and illuminates the direction of travel.

As described above, according to the cornering lamp system according to this embodiment, when the headlights are on, the illumination is performed in the direction of travel in conjunction with the steering wheel of the vehicle, and when the headlights are off, the illumination direction is Since the lamp is stopped with the headlight facing forward, the durability of the lamp drive unit 3 and the drive mechanism (not shown) that changes the direction of irradiation of the headlight is improved. Furthermore, when the headlights are turned on, the direction of illumination of the headlights quickly rotates and illuminates the direction in which the vehicle is traveling, so safety during night driving is not compromised.

In this embodiment, when the lighting switch 54 is closed, the irradiation direction of the headlights such as the low beam lamp 51 and the high beam lamp 52 is changed. When the auxiliary light switch 55 is closed when the switch 54 is closed, the irradiation direction of the auxiliary light 56 may be changed in conjunction with before the knob is operated. That is, in the figure, the auxiliary light switch 55 is connected in series with the lighting switch 54 and the auxiliary light 56, and the auxiliary light switch 55 and the auxiliary light 56 are connected in series.
A connection point 5C with 6 is connected to the output terminal 5b. Then, the low beam lamp 51 and the high beam lamp 5
The irradiation direction of the two-way headlights is fixed to the front, and the irradiation direction of the auxiliary lights 56 is set to the lamp drive shaft 6 in FIG.
It can be changed by. Therefore, when the auxiliary light switch 55 is closed after the headlights are turned on, the auxiliary light 56 is turned on, and the irradiation direction of the auxiliary light 56 is linked to the steering wheel and illuminates the direction of travel. Generally, there is a legal regulation that ``auxiliary lights must not be turned on alone except when the headlights are turned off.''

Taking these points into consideration, the auxiliary light lighting circuit shown in Figure 3 was constructed.The auxiliary light lighting circuit shown in Figure 3 changes the irradiation direction only when the auxiliary light is turned on while driving with the headlights on. Since the illumination is fixed and the direction of illumination of only the auxiliary light 56 is changed, visibility during driving is widened and legal regulations are also met. In this way, the lighting means may be an auxiliary light, and the headlights do not necessarily have to be linked to the steering wheel.

In this embodiment, the processing circuit 2 is constructed of a hardware circuit, but it may also be program-controlled using a microcomputer or the like, and sliding contacts may be used to detect the rotational position of the headlight. , detection may be performed using light. Further, although the irradiation direction is changed stepwise in conjunction with steering wheel steering, it may be configured to change continuously. According to the cornering lamp system, the irradiation direction of the lighting means is changed only when the lighting means is turned on, and when the lamp is turned off, the lamp stops facing the front, so that the irradiation direction of the lighting means does not change when the lamp is turned off. The machine can stop facing forward, improving the durability of the entire system.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram showing an embodiment of a vehicle cornering lamp system according to the present invention, Fig. 2 is an output waveform diagram of a photosensor used in this cornering lamp system, and Fig. 3 is a diagram showing the output waveform of a photo sensor used in this cornering lamp system. FIG. 4 is an auxiliary light lighting circuit diagram that changes the irradiation direction of the auxiliary light in a state where the auxiliary light is turned on; 1... Photo sensor, 2... Processing circuit, 3...
...Lamp drive unit, 4...DC power supply, 5...
...Headlight lighting circuit, 28...UP/DOWN counter, 29...Spring decoder/driver, 31...
Sliding board, 32.33...conductor pattern, 34&~
34i...Sliding contact, 6...Lamp drive shaft, 3
9...DC motor, 54...Lighting switch, 55...Auxiliary light switch.

Claims (1)

[Claims] In a vehicle cornering lamp system that varies the irradiation direction of a lighting means in conjunction with steering wheel steering, the irradiation direction variable means changes the irradiation direction of the lighting means only when the lighting means is turned on, and stops facing the front when the lamp is turned off. A cornering lamp system for a vehicle characterized by being provided with.