JPS6277249A - Cornering lamp system for vehicle - Google Patents

Abstract

PURPOSE:To simplify the structure of an electric cornering lamp system and obtain a low cost and high reliability by changing the illumination direction in stages together with handle steering. CONSTITUTION:The level condition of the electric pulse signal sent, when a handle is rotated clockwise or counter-clockwise from a neutral point, from output terminals 17, 18 of a photosensor 1 fitted to a slit disk interlocked with the handle is processed by an AND gate 26 or 27 of a processing circuit 2. Next, it is converted into a count value by an UP/DOWN counter 28 to select the output terminal of a decoder/driver 29. Then, a DC motor is rotated, and the illumination direction of a head lamp is changed in stages together with handle steering. According to this constitution, the structure of a cornering lamp system is facilitated, and a low cost and high reliability can be obtained.

Description

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

[Conventional technology]

#￥￥￥￥￥￥ｮｶCars in particular are equipped with headlights as a means of illuminating the front at night, but these headlights only illuminate the front of the car in a fixed manner9. In the case of fc approaching, the direction of travel of the car is poor and sufficient irradiation cannot be achieved. At t9, when cornering around a curve, etc., sufficient illumination was not provided in the direction in which the vehicle was actually traveling, which raised the possibility of danger.

So, is this a problem? In order to improve, conventional F.
A cornering lamp system has been proposed in which the direction of illumination of the headlights is fully variable in conjunction with the steering of the vehicle's steering wheel, and the headlights are illuminated in all directions. For example, a mechanical cornering lamp system configured to generate a headlight sound through a steering wheel link,
An electric cornering lamp system has been proposed in which the rotation angle of the headlamp is detected by a rotary encoder/coder and controlled by a servo motor. Mechanical cornering lamp systems have to be specially designed for each vehicle, so they are not very versatile, and from this point of view, electric cornering lamp systems are more advantageous because of their versatility.

[Problem that the invention seeks to solve]

However, in conventional cornering lamp systems, the irradiation direction of the headlights is continuously changed in conjunction with the steering wheel of the host vehicle, especially in electric cornering lamp systems. The problem is that the configuration is complicated and reliability is low considering the high cost.

[Ninth way to solve the problem]

The present invention has been made in view of this problem, and is designed to change the next irradiation direction step by step in conjunction with steering wheel operation.

[For production]

Therefore, by applying the present invention, it is possible to simplify the configuration of an electric cornering lamp system.

〔Example〕

Hereinafter, the vehicle cornering lamp system according to the present invention will be explained in full detail. FIG. 1 is a circuit diagram showing one embodiment of this cornering lamp system. In the figure, 1 is a 7-photo sensor attached to a disc with a slit (not shown) linked to the handle, 2 is a processing circuit that processes the electrical signal sent out from this photosensor 1, and 3 is a processing circuit of this processing circuit 2. A lamp drive unit 4, which drives a headlamp (not shown) based on a processed signal to be sent out, is a DC power source.

The photosensor 1 has a light emitting diode 11. A first photointerrupter 13 consisting of a phototransistor 12 and a resistor R+, a resistor Rz9, a light emitting diode 14, and a resistor Rs for the phototransistor 15.

The output terminal 17 of the photo interrupter 13 is connected to the output terminal 18 of the photo interrupter 16 in conjunction with the steering wheel of the automobile. As shown in FIGS. 2(a) and 2(b), pulsed electrical signals of the same waveform are generated, with alternating "1" level and OJ level. In other words, when the handle is rotated clockwise (clockwise) from the neutral point, a positive electrical signal centered at 0° is rotated counterclockwise (leftward).
By doing this, an electric signal in the negative direction centered at 0° fjI is generated. (a) shows the electric signal generated at the output terminal 17, and (b)
8 shows the electrical signals generated at 8. The electrical signal generated at the output terminal 17 is 90 degrees ahead of the electrical signal F generated at the output terminal 18, and when the handle is at the neutral point, that is, at 0 degrees in FIG. The generated electric signal is generated at the output terminal 17 when the falling edge changes from r l J level Lr) to r OJ level, or from the "0" level to the "1" level, or at the rising time. The electric signal that appears is ``0 level bad.''

On the other hand, the processing circuit 2 includes Nant gates 21, 22, an inverter 23, an R-S flip-flop circuit 24, 25, AND gates 26, 27, an UP/DOWN counter 28, and a decoder/driver 29. R
- The S flip-flop circuits 24 and 25 are composed of OR gates 241, 242 and 251, 252 with negative logic inputs. Then, the electric signal generated at the output terminal 1T of the photosensor 1 is inputted to one end of the Nant gate 21 and 22, and the reset terminals 24r and 25r of the R-S flip-flop 21 circuit 24 and 25. The output terminal 18 of the 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 output from the inverter 23 is inverted and output from the other end of the Nant gate 21 and input to one leak of the AND gate 27. Mano, Nantes Gate 21
The output of the work 22 is the R-S flip-flop circuit 24.
It is designed to be input to the set terminals 24g and 25s of the workpiece 25, and the R-S flip-flop circuit 24
The output of the workpiece 25 is the Q output terminal 24q workpiece 25q k
The signal is inputted to the other end of the AND gate 26 and 27 through the gate. And gate 26 work 2
The output of the UP/DOWN counter 28 is input to the up input terminal 28μ or the down input terminal 28d, and the UP/DOWN counter 2B receives a "1" level signal at the input terminal 28μ or 28d. Each time the count value is input, the count value is increased or decreased, and a nine digital signal is outputted to the terminal 28 according to the count value.
The signals are sent to input terminals 29A to 29D of the decoder/driver 29 via A to 28D. The decoder/driver 29 receives this digital signal, selects a predetermined output terminal from among the output terminals 29a to 29o, and sets its level to "0".

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 10'' level. . and,
Every time the count value increases by 1 in the UP/DOWN kakunta 28, the output terminal'! becomes the "0" level! !
-29g from 29h.

29f...29a and so on. Also, each time the count value in the UP/DOWN unit 28 decreases by 1 from zero, the output terminal becomes ``0'' level. 29h to 291°29j...2
9o and so on. It goes without saying that even in a countdown after a count-up or a count-up after a countdown, the output terminals at the "0" level are successively carried down or carried up to the adjacent output terminals. Then, the output terminals 29m and 29b of the decoder/driver 29 are connected to the output terminal 2a of the processing circuit 2, the output terminals 29c and 29d are connected to the output terminal 2b, and the output terminals 29e and 29f are connected to the output terminals 2C, 29g and 29h. The workmanship 29i is the output terminal 2
d, 29j and 29k are connected to output terminal 2e, 29t
The wire 29m is connected to the output terminal 2f, and the wire 29n is connected to the output terminal 29o.

Then, the output terminals 2a to 2g of the processing circuit 2 are formed on the sliding substrate 31 of the lamp drive unit 3, and the sliding contacts 34 are in sliding contact with the conductor pattern 32 in the shape of a semicircular band 33.
The sliding contact 34a adjacent to the sliding contact 34b is connected to the coil 351 of the relay 35.
The direct current is connected to the positive side of the source 4 via. te
, the sliding contact 34i adjacent to the sliding contact 34h is also connected to the positive polarity side of the DC power supply 4 via the coil 361 of the relay 36, and a diode 3T 38 is connected in parallel to the coil 351 and 361. It is connected to the. Then, the normally open/normally closed contacts 352 of the relay 35 and the normally open/normally closed contacts 362 of the relay 36 are connected to both connection ends of the DC motor 39, and when the relay 35 is energized, the normally open/normally closed contacts 352 of the relay 35 are connected. The common terminal 352c of the open/normally closed contact 352 and the normally open contact terminal 352a are electrically connected, and the positive polarity side of the DC power supply 4 is connected to one end of the M-flow motor 39. However, when the relay 36 becomes energized, the common terminal 362c of the normally open/normally closed contact 362 and the normally open contact terminal 36 are connected.
The positive polarity side of the source 4 is connected to the other end of the DC motor 39. In other words, the normally open/normally closed contact 352 and the normally closed contact terminal 362 are normally connected to the common terminal 352c and the normally closed contact terminal 352.
When the DC motor 39 is connected to the motor 362b, both ends of the DC motor 39 are grounded.

Then, DC power is supplied to the I-current motor 39 through the normally open/normally closed contacts 352, and at 9 o'clock, the motor is connected to the lamp drive shaft 5.
The lamp drive shaft 5 is rotated completely clockwise (clockwise rotation in the figure), and as the lamp drive shaft 5 is rotated clockwise, the conductor pattern 32 and the conductor pattern 33 are also rotated clockwise together with the sliding substrate 31. Further, at time t when DC power is supplied to the DC motor 39 via the normally open/normally closed contacts 362, the lamp drive shaft 5 rotates counterclockwise, and as the lamp drive shaft 5 rotates counterclockwise, the conductor pattern 32 and The workpiece 33 is designed to rotate counterclockwise in conjunction with the sliding base plate 31. It goes without saying that the irradiation direction of the headlight changes by clockwise and counterclockwise rotation of the lamp drive shaft 5. The direction is rotated to the left when viewed from the driver's seat, and the lamp drive shaft 5 is rotated to the left (thereby, the direction of illumination of the headlight is rotated to the left).

Next, we will explain the operation of the cornering lamp system for a vehicle constructed in this way. That is, the car is currently traveling straight, and the steering wheel is located at the neutral point. (point N in Figure 2).

At this time, the count value in the UP/DOWN counter 28 is zero, and the v1 decoder/driver 29 outputs the output terminal 29.
Only h is at the "0" level.

'19, output terminals 29a to 29g, and output terminals 29
i~290 are all at rl, J level, and sliding contacts 34b~3 are in contact with conductor patterns 32 and 33.
4d The workpieces 34f to 34g are at the "1" level. Therefore, power is not supplied to the relay 35 and 36, and the DC motor 39 does not rotate. Tsu'! At this time, the headlights are stopped facing forward.

However, if you turn the steering wheel clockwise and start steering to the right from such a state, the photo-interrupter 13 and 16
The electric signal sent by becomes rlJ and "0 lebel (
point a in Figure 2). Due to this, the output of J:v1 Nantes gate 21 changed from "1" level to 5rOJ level, R-S
The flip-flop circuit 24 is set, and the Q output terminal 2
4q becomes 11-rubel. Then, when the right steering is further performed and the position is shifted to point b in FIG.
“ is input to the up input terminal 28u of the P/DOWN counter 28.
1'' level signal is input, and the count value in the UP/DOWN counter 28 is incremented by 1.

As a result, the 10'' level signal that was being sent out by the decoder 7/driver 29 up to that point is transferred from the output terminal 29h to the output terminal 29g and sent out. However, since the output terminal 29g is connected to the output terminal 2dK of the processing circuit 2 in the same way as the output terminal 29h, the motor 3
No power is supplied to the vehicle 9, and the headlights continue to illuminate in the same direction toward the front. Then, it was decided to continue steering to the right, and the output terminal 11 of the photo sensor 1 was closed.
becomes rOJ and "1" level (8 points in Figure 2),
Reset terminal 24r of R-S clip prop circuit 24
The signal becomes OJ level, the flip-flop is reset, and the Q output terminal 24q becomes "0" level to prepare for the next count. When the point d in FIG. 2 is reached, the output of the Nant gate 21 changes from the "1" level to the "0" level, and the R-87 lip-flop circuit 24 is in the set state, and the Q output terminal When 24q becomes the "1" level again and reaches the 0 point in Figure 2, the AND gate 2
The output of 6 becomes 11'' level and the count value in the UP/DOWN counter 28 further increases by 1. Due to the increase in the count value, the decoder/driver 2S increases the rOJ level signal that had been sent out from the output terminal 29g to the output terminal 29f, and sends it out to the coil 351 of the relay 35 through the sliding contact 34a and the conductor. Current flows through the path between the pattern 32, the sliding contact 34a, and the output terminal 2C. By energizing the coil 351, the common terminal 352C of the normally open/normally closed contact 352 and the normally open contact terminal 352a are brought into conduction, the DC motor 39 rotates, and the lamp drive shaft 5 rotates clockwise.

This clockwise rotation of the lamp drive shaft 5 moves the irradiation direction of the headlight clockwise, and the sliding board 31 rotates clockwise while sliding the sliding contacts 34a to 341 on its conductor patterns 32 and 33. . Then, when the sliding contact 34 (L is a conductor) turns 32 times 1 m, the energization to the coil 351 of the relay 35 is released, and the normally open-normally closed contact 3
The common terminal 352c of 52 and the normally open contact terminal 352a become non-conductive, and the power supply to the DC motor 39 is cut off. The DC motor 39 rotates slightly due to inertia and then stops.
The sliding substrate 31 has a conductor pattern 32 as shown in FIG.
A sliding contact 34d is located approximately in the center of the opposing gap 31a between and 33.
stop in good alignment.

Hereafter, in the same way, by continuing to steer to the right, UP/D
The count value in the OWN counter 28 increases sequentially, and the position of the "0" level signal sent by the decoder/driver 29 is incremented to 9 to the output terminals 29e, 29d...29a, and the F DC motor 39 is intermittently , and the direction of illumination of the headlights moves clockwise in stages.

Next, we will explain how to make the handle when it rotates counterclockwise with all its neutral points. That is, when NAL steering to the left in FIG. 2 is performed, the output terminal 17 of the photosensor 1
are both at the "1" level 9 (point f in FIG. 2), the output of the Nant gate 22 is at the "0" level, the R/S flip-flop circuit 25 is set, and the Q output terminal 25q is at the "1" level. When it reaches point g in Figure 2,
The output terminal 17 output 18 becomes "1" and "0" level 9, and the two outputs of the AND gate 27 become "1-level", and the UP/DOWN color 7 evening 28 O down input terminal 28d outputs " 1” level signal is input, UP
/DOWN Kakunta 28 counts down the count value by one. By this countdown, the decoder/driver 29 lowers the signal at the "0" level that has been sent up to that point from the output terminal 29h to the output terminal 291 and sends it out. Then, when reaching point h in Figure 2,
Both output terminals 1γ and 18 become “0” level, and R
- The S flip-flop circuit 25 is reset, and the Q output terminal 25q becomes "0" level to prepare for the next count. However, when it reaches point 1 in Figure 2 and at time t, UP/D
The count value in the OWN kakunta 28 further counts down by 1, and the position of the "0" level signal sent by the decoder/driver 29 is from the output terminals 29i to 29j.
fall back to

To this, F, the sliding contact 3 to the coil 361 of the relay 36
41. Conductor pattern 33. Sliding contact 34f, output terminal 2
A current flows through the path e, the common terminal 362C of the normally open/normally closed contact 362 and the normally open contact terminal 362a are electrically connected, the DC motor 39 rotates, and the lamp drive shaft 5 rotates clockwise. The lamp drive shaft 5 is moved counterclockwise in the direction of the irradiation force of the EC rainbow headlight, and the sliding board 31 is moved to the left.
rotates to the left, and the sliding contact 34f moves to the conductor pattern 33
When the coil 361 of the relay is separated, the energization to the coil 361 of the relay is released, the common terminal 362C of the normally open/normally closed contact 362 and the normally open contact terminal 362a become non-conductive, and the power supply to the DC motor 39 is cut off. . In response to this, the DC motor 39 rotates by nine rotations due to inertia and then stops. Thereafter, in the same manner, as the left steering wheel continues to be turned, the count value in the EX UP/DOWN counter 28 decreases sequentially, and the position of the "0" level signal sent by the decoder/driver 29 is at the output terminal 29.
, 291...29 degrees, and the bottom of the reel is 9. This causes the DC motor 39 to rotate intermittently, and the irradiation direction of the headlight moves counterclockwise in stages.

Incidentally, in this embodiment, the stepwise swing angle of the headlight irradiation direction is set to 10 degrees, and then the headlight irradiation direction can be swung by a maximum of 30 degrees left and right. There is. In order to obtain this deflection angle, the sliding contacts 34b to 34h are arranged at equal angular intervals, and the intervals are sufficient to swing the headlight irradiation direction 'k by 10 degrees in one step. . The field of view obtained by changing the direction of headlight illumination step by step using this simple method is sufficient for practical purposes.
Tsuno. Generally, automobile headlights have an epoch pattern of several tens of degrees, and for this distribution pattern, 10 to 30
If you move the headlights in steps of about 10%, you can achieve sufficient visibility for practical purposes without having to move the headlights continuously like in the past.
k can be obtained.

In addition, in this embodiment, we will explain the operation when the knob is rotated clockwise and counterclockwise from the neutral point.
Even if it is a left turn after a right turn, or a left turn and a right turn after a friend, the UP/DOWN caranta 2
It goes without saying that the count value at 8 is sequentially counted down or counted up, and the irradiation direction of the headlight changes according to this count value.

As described above, according to the cornering lamp system according to the present embodiment, since it is possible to illuminate the direction of travel in conjunction with the steering wheel of the automobile when cornering, safety during driving is ensured, and The system uses a direct current motor to change the irradiation direction step by step, making it a simpler, lower cost, and more reliable system than the conventional servo motor system. It becomes. In a system using a servo motor, if the rotational position detection terminal of the motor is disconnected, the rotational position becomes uncontrollable, which is a common problem. By doing so, a fail-safe operation can be obtained in which the operation only stops when the wire is disconnected.

In this embodiment, the processing circuit 2 may be constructed of a 71-code circuit, and the processing circuit 2 may be entirely program-controlled using a microcomputer or the like. I used a contact, but it doesn't work if I try to detect it at the source. In addition, in this embodiment, the deflection angle in the irradiation direction of the headlight is set to ``k10'' in stages and at equal intervals. It may be configured to have sparse patterns and may be arranged at irregular intervals.

In addition, the rotational shift wJJ of the headlight irradiation direction by the lamp drive shaft 5 may affect the entire headlight, but generally the installation space for the headlight of a car is narrow, and the entire headlight is f
There are many lifting platforms that do not have the necessary space for loading. Also, even if you move the entire headlight and cover it, there is a problem that it will freeze in cold regions etc. 2) - It will disappear.
Recently, a method has been proposed in which the reflector inside the headlight is movable.However, this requires additional space inside the headlight to move the reflector, making the entire headlight larger. Therefore, it is difficult to realize due to space constraints.In view of these points, the cornering lamp system in this embodiment uses a movable sub-reflector headlamp as shown in Fig. 4. .

That is, in the figure, 6 is the main reflector,
7 is the sub-reflector, 8 is the source. The sub-reflector γ is designed to rotate in conjunction with the lamp driving shaft 5 shown in FIG. When the vehicle is running straight, the directions of light reflected by the main reflector 6 and the sub-reflector γ are the same. From this troubled state,
When a car makes a right turn, the rung drive shaft 5 intermittently rotates to the right in conjunction with the steering wheel steering, as explained using FIG. 1 above, and only the sub-reflector 7 rotates as shown in FIG. 5. Due to the rotational movement of the moving L 7'' IJ reflector γ, the source reflected by the sub-reflector γ is irradiated toward the right in the figure.
The reflected light will illuminate the direction of travel. At this time, the reflected light from the main reflector 6 illuminates the front, and compared to a method in which the entire main reflector 6 is moved, visibility during night driving is expanded9 and safety is improved.

Furthermore, by configuring the main reflector 6 to move the small sub-reflector 7, it is possible to take up a space for moving the headlight without increasing the size of the headlamp, making it possible to fully realize this.

In addition, in this embodiment, the headlights are made to move in conjunction with steering wheel steering, but the direction of illumination of the headlights is fixed to the front as before, and serves as an auxiliary lighting device that moves in conjunction with steering wheel steering. There are many ways to use light. Providing such an auxiliary light has the same effect as the sub-reflector 7 described above. 8.

In this embodiment, the photosensor 1, the processing circuit 2
, lamp drive unit 3, and DC power supply 4 constitute the step means.

〔Effect of the invention〕

As explained above, according to the cornering lamp system for a vehicle according to the present invention, the direction of irradiation of light is changed in stages in conjunction with the steering wheel, so that the configuration of the electric cornering lamp system can be simplified. This makes it possible to achieve lower cost and higher reliability than the conventional cornering lamp system that uses servo motors all around.

[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, FIGS. 2 and 2 are output waveform diagrams of a photosensor used in this cornering lamp system, and FIG. FIG. 4 is a state diagram illustrating the operation of the sliding board, FIG. 4 is a schematic diagram of the internal structure of a headlamp driven using this cornering lamp system, and FIG. 5 is an explanatory diagram of the operation of this headlamp. 1st race...photo sensor, 2nd...processing circuit, 3rd...
・Reference lamp drive unit, 4・Reference DC power supply, 28・
・Work・UP/DOWN counter, 29・me・Decoder/driver, 31--・Sliding board, 32.33-
---Conductor pattern, 34a to 341... Sliding contact, 39... Cross flow motor.

Claims (1)

[Claims] A vehicular cornering lamp system that changes the irradiation direction of a lighting means in conjunction with steering wheel steering, characterized in that the vehicular cornering lamp system is provided with step means for changing the irradiation direction of the lighting means in stages.