JPH01168535A - 2-stage operation type steering interlocking system - Google Patents

Abstract

PURPOSE:To provide an irradiation direction varying system for a front lamp which has high reliability, by a method wherein a switching mode is switched in linkage with steering of a handle, the rotary angle position of an actuator is varied to positioning spots in 2 stages. CONSTITUTION:When right ward steering is started, a pulseform electric signal the phase of which is displaced by 90 deg. is inputted to an up/down switching circuit 11 through input terminals 1a and 1b of a controller 1 to generate an up signal. Count up is effected by a counter 12, when a right steering position is switched to 15 deg., a given potential mode is generated. A right reciprocating rotation position/direction discriminating signal is sent from a rotation position/ direction discriminating circuit 14, the irradiation direction of a right lamp is switched rightward in an 15 deg. arc through a control logic generating circuit 15 and a right lamp drive unit 2. In turn, right ward steering is continued, and when it is steered to a 30 deg. position, the irradiation direction of the right lamp is similarly switched in a 30 deg. direction. During left ward steering, a similar motion described above is effected. This constitution enables simplification of constitution and improvement of reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a two-stage system suitable for use in changing the irradiation direction of a headlamp on a vehicle to two positioning positions in conjunction with steering of the nozzle. This invention relates to a stepped steering interlock system.

[Conventional technology]

Vehicles, especially automobiles, are equipped with headlights to illuminate the road ahead at night, but these headlights illuminate only the front of the vehicle, and when approaching a curve. In some cases, the direction in which the vehicle is traveling cannot be sufficiently illuminated. That is, when cornering around a curve, sufficient illumination is not provided in the direction in which the vehicle is actually traveling, and there is a risk that danger may occur.

Therefore, in order to improve such problems, conventionally,
A cornering lamp system has been proposed in which the direction of illumination of headlights is varied in conjunction with the steering of the vehicle's steering wheel, and is configured to illuminate the direction of travel. For example, there is a mechanical cornering lamp system in which the headlight is moved via a link from a steering shaft that rotates as the steering wheel is turned, or a cornering lamp system in which the rotation angle of the headlight is detected with a rotary encoder and a servo motor is used to detect the rotation angle of the headlight. Electric cornering lamp systems and the like have been proposed.

[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 vehicle, and its position is controlled. The problem was that it required wiring and had low reliability despite its high cost.

[Means for solving problems]

The present invention has been made in view of these problems, and is based on an up-down signal generated in conjunction with steering wheel steering to determine the straight steering position of the steering wheel and a position a predetermined rotation angle α away from this straight steering position. A first steering position and a second steering position separated by a predetermined rotation angle β from the first steering position are detected, and the second steering position is detected based on an up-down signal generated in conjunction with the steering wheel steering. The steering direction of the steering wheel is determined, and based on the detection result of the steering wheel steering position and the determination result of the steering wheel steering direction, when detecting the straight steering position, a first mode signal is transmitted from the straight steering position side. When detecting the first steering position by steering the steering wheel, the second steering position is detected.
a third mode signal when detecting the second steering position, and a fourth mode signal when detecting the first steering position by steering the steering wheel from the second steering position side. A switching means is provided which transmits a mode signal and switches the switching mode to the first to fourth connection modes in accordance with the transmitted first to fourth mode signals, and the first to fourth connection modes of the switching means In the connection mode, the rotational angular position of the actuator is placed at the initial rotational angular position, and by switching from this initial rotational angular position to the second connection mode, the actuator is moved to the first rotational angular position that is separated by α1 from this initial rotational angular position. The rotational angular position of the actuator is located at the rotational angular position, and by switching from this first rotational angular position to the third connection mode, a second rotational angular position is set at a distance of β1 from this first rotational angular position. The actuator is moved to a first rotational angular position that is separated from the second rotational angular position by the distance βl by switching from the second rotational angular position to the fourth connection mode. The angular position of the rotation is made to vary.

[Effect]

Therefore, according to the present invention, the rotational angular position of the actuator is varied between two positioning positions with respect to the initial rotational angular position based on the connection mode of the switching means whose switching mode is switched in conjunction with steering wheel steering.

〔Example〕

Hereinafter, the two-stage steering interlock system according to the present invention will be described in detail.

FIG. 1 is a circuit diagram showing an embodiment of a cornering lamp system for a vehicle to which this two-stage steering interlocking system is applied. In the figure, reference numeral 1 indicates an electric signal (input terminal 1a) input in conjunction with steering wheel steering.
and rHJ level and rLJ input via 1b
A controller 2 selectively determines the potential levels of its output terminals 1w, 1x+1>' and 1z based on pulsed electric signals (pulsed electrical signals with alternating levels); A right lamp drive unit 3 that changes the direction of illumination of a headlight (right lamp, not shown) installed on the front right side is installed on the front left side of the vehicle based on the potential level of the output terminals 1y and 12 of the controller 1. This is a left lift drive unit that changes the direction of illumination of a headlight (left lamp) not shown.

The controller 1 is an UP/DOWN switching circuit that takes in pulsed electrical signals input through input terminals 1a and 1b and generates up and down signals according to the amount of right and left steering of the steering wheel. 11, and an UP/DOWN counter 12 which takes as input the up signal and down signal generated and sent out by this UP/DOWN switching circuit 11, and counts up or down the count value by the number of input amplifier signals and down signals. and a decoder 13 which inputs the count value (digital signal value) sent out by this UP/DOWN counter 12 and sets only the level of the output terminal at a position corresponding to this count value as rLJ, and the output of the UP/DOWN switching circuit 11. up and down signals and UP/DOWN
A rotational position/direction determination circuit that receives as input the MSB of the count value sent by the counter 12 and determines the rotational position of the steering wheel (right steering position or left steering position starting from the straight steering position) and steering direction based on this input information. 14, this rotational position/direction discrimination circuit 14 and decoder 13
A control logic generation circuit 15 whose input is the output of
It is composed of.

The count value in the UP/DOWN counter 12 is set to zero based on the straight steering position of the steering wheel, and when the steering wheel is rotated to the right, the count value increases sequentially, and when the steering wheel is rotated to the left, the count value decreases sequentially. It has become. When the count value of the UP/DOWN counter 12 is zero, that is, when the steering wheel is in the straight steering position, the decoder 13 sets only the level of its output terminal 13h to rLJ.
Each time the count value in the UP/DOWN counter 12 increases by one, the output terminal position to be set to the rLJ level is sequentially moved to the adjacent output terminals 13i, 13j, . . . , 130. Further, each time the count value in the UP/DOWN counter 12 decreases by one from zero, the output terminal position to be set to the rLJ level is sequentially moved down to the adjacent output terminals 13g, 13f, . . . , 13a. Of course, UP/DOWN counter 12
Even in the countdown after the countup or the countup after the countdown, rLJ
It goes without saying that the output terminal positions that correspond to the level are sequentially moved down or up to the adjacent output terminal positions. Then, the output terminal 1 of the decoder 13
3a to 13c, 13d to 13f, 13g to l 31.
13 J-131+ 13 m-13o are grouped together, and the potential level of each group of terminals is signal (e).
, (d), (c), (bl, each input terminal 1 of the control logic generation circuit 15 as (a)
5e, 15d, 15c, 15b, and 15a. In this embodiment, UP/DOWN
Based on the count value sent by the counter 12, the decoder 1
The steering wheel steering range where the output terminals 13g to 13i of the decoder 13 are at rLJ level is the detection range of the straight steering position, and the steering wheel steering range where the output terminals 13j to 13N of the decoder 13 are at the "L" level is the right steering position of 15°. range of detection,
The steering wheel steering range in which the output terminals 13m to 130 of the decoder 13 reach the rLJ level is defined as the detection range of the right steering position of 30 degrees. Also, based on the count value sent from the UP/DOWN counter 12, the output terminal 13d of the decoder 13
The steering wheel steering range where ~13f reaches the rLJ level is defined as the detection range of the left steering position 15', and the steering wheel steering range where the output terminals 13a-13c of the decoder 13 reach the rLJ level is defined as the detection range of the left steering position 30°.

FIG. 2 is a timing chart showing input/output signals to the rotational position/direction determining circuit 14. That is, in the right steering position starting from the straight steering position, the UP/DOW
The MSB of the count value in the N counter 12 becomes "L" level (Fig. 2 (C)), and when this MSB is at rLJ level, the amplifier signal (Fig. 2 (a)) is input via the UP/DOWN switching circuit 11. Then, the right reciprocating rotation position /
The direction discrimination signal (signal (f) shown in Fig. 2 (d)) is rH
It will be J level.

Furthermore, when the down signal (FIG. 2 (b)) is input through the UP/DOWN switching circuit 11 when the MSB is at rLJ level, the right reciprocating rotation position/direction discrimination signal (f) is sent to the control logic generation circuit 15. becomes the rLJ level. On the other hand, in the left steering position starting from the straight steering position,
MS of count value in UP/DCVN counter 12
B becomes rHJ level (Figure 2 (C)), and this MSB
When the down signal is input through the UP/DOWN switching circuit 11 at the rHJ level, the left reciprocating rotation position/direction discrimination signal (the signal shown in FIG. 2 (el) g)) becomes the rHJ level.Also, when the MSB is at the rHJ level, UP/D
When the up signal is input through the OWN switching circuit 11, the left reciprocating rotation position/direction discrimination signal Tg) to the control logic generating circuit 15 becomes "L" level. That is, when the steering wheel is steered in the right steering direction or the left steering direction at the right steering position, the right reciprocating rotation position/direction discrimination signal (fl is at the "H" level or the rLJ level) is sent to the control logic generating circuit 15. , when the steering wheel is steered in the left steering direction or in the right steering direction at the left steering position, the left reciprocating rotation position/direction discrimination signal fg) to the control logic generating circuit 15 is rH.
The circuit configuration of the rotational position/direction discrimination circuit 14 is such that the rotational position/direction determination circuit 14 is at the J level or the rLJ level.

The table below is a truth table showing the input/output characteristics of the control logic generation circuit 15. In addition, in the same table, ←)～
(Z) indicates signals sent out from the output terminals 15W to 15z.

That is, based on the potential levels of the signals (a) to (g) input via the input terminals 153 to 15g, the signals (1v) to (Z
The circuit configuration of the control logic generation circuit 15 is such that the potential level of l is determined as shown in the above truth table.
are output terminals IW and 1x of controller 1 and 1
y and IZ, and the signal input terminals 2a (1-stage/2-stage switching terminal 2a) and 2b (forward/reverse rotation switching terminal 2b) of the right lamp drive unit 2 and the signal input terminal of the left lamp drive unit 3 It is connected to 3a (1st stage/2nd stage switching terminal 3a) and 3b (normal rotation/reverse rotation switching terminal 3b).

The right lamp drive unit 2 includes an actuator 21, a switching circuit 22, and a DC motor 23, and the switching mode in the switching circuit 22 is switched by cutting off the supply of energizing current to the relay coils 24 and 25. It has become a thing. That is, the normally open/normally closed contacts 2 of the relay coil 24
4-+.

24-2 and normally open/normally closed contacts 25 of relay coil 25
-,. 25-, the switching circuit 22 is constituted by the common terminal 24-+ of the normally open/normally closed contact 24-2.
c and normally closed contact terminal 25-+- of normally open/normally closed contact 25-I
are connected to each other, and the common terminal 24-zc of the normally open/normally closed contact 244 and the normally open contact terminal 25- of the normally open/normally closed contact 25-2 are connected to each other. And always open
Normally open contact terminal 25-0 of normally closed contact 25-1 and normally open contact terminal 25-1
The normally closed contact terminal 25-□ of the normally closed contact 25-t is grounded, and the common terminal 25- of the normally open/normally closed contact 25-1 is grounded.
c is a normally open/normally closed contact 25-2 at one end of the DC motor 23.
A common terminal 25-zc of the DC motor 23 is connected to the other end of the DC motor 23.

On the other hand, the actuator 21 includes a movable contact piece 211 that rotates about its axis 211p in conjunction with the rotation of the DC motor 23, and a first fixed contact part that is independently constructed on a circuit board (not shown). 212-+ to a fourth fixed contact portion 212-, and a fixed contact piece 212 consisting of a fourth fixed contact portion 212-. The movable contact piece 211 is integrally formed of a conductive member, and the first movable contact portion 211 is provided on the lower surface of the tip of the first extending piece 211a, which is formed in a cross shape and extends from the axis 211p. ．． However, the second extending piece 211
A second movable contact part 211-2 is provided on the lower surface of the tip of b, and a third
A third movable contact portion 21 is provided on the lower surface of the tip of the extending piece 211c.
1-+, a fourth movable contact portion 211-4 is formed to protrude from the lower surface of the tip of the fourth extending piece 211d. The first to fourth movable contact portions 2 of this movable contact piece 211
The arrangement positions of the first to fourth fixed contact portions 212- and 212-4 of the fixed contact piece 212 are determined corresponding to the fixed contact portions 111 to 211-4. That is, when the illustrated state is the initial rotation angle position of the DC motor 23, the third movable contact part 211 is in a state where the first fixed contact part 212-1 is in contact with the first movable contact part 21L. -3, the movable contact piece 211 is placed at a position of 15° clockwise (to the right in the figure) from the illustrated state as the base point (0″' position) so that the third fixed contact portion 212-3 is in a non-contact state. When the rotated position is the first rotation angle position of the DC motor 23, the second fixed contact part 21LZ is the second movable contact part 2114.
211. is in contact with the first movable contact portion 211. against the first
Fixed contact portions 212-. is in a non-contact state, and the third fixed contact part 2 is in a non-contact state with respect to the third movable contact part 211-3.
12-3 is in contact with the fourth movable contact portion 211. The second rotation angle of the DC motor 23 is set at a position where the movable contact piece 211 is rotated 30 degrees to the right from the illustrated state so that the fourth fixed contact portion 212- is in a non-contact state. position, the fourth movable contact portion 211
-4, the fourth fixed contact part 212- is in contact with the second movable contact part 2114, and the second fixed contact part 212- is in contact with the second movable contact part 2114.
12-2 is in a non-contact state, the first to fourth fixed contact parts 211. ~212-. The placement position is determined. FIG. 3 is an enlarged layout diagram of the conductor patterns constituting the fixed contact portions 212-t to 212- in the fixed contact piece 212. In this embodiment, the inertia of the drive system is assumed to be 3°, The arrangement angle of each conductor pattern with respect to the orthogonal axis X-Y centered on the axis 211p is θ1
=5°.

θ2=12', θ3=5'', θ4=27'', θ5=3
It is determined that θ6=35°, θ7=18°, and θ8=35°. Then, the first fixed contact portion 2 of the fixed contact piece 212
12-I and the second fixed contact portion 212-2 to the normally open contact terminal 24-23 of the normally open/normally closed contact 24-2 and the normally open contact terminal 24-2. and the fixed contact piece 212
The third fixed contact part 212-3 and the fourth fixed contact part 21 L4 are connected to the normally closed contact terminal 2 of the normally open and normally closed contact 24-2.
4-, and the normally open contact terminals 24- and b.

Note that in the actuator 21, the movable contact piece 2
11 is connected to a high potential power source, and when a drive current is supplied to the DC motor 23 in the direction A or B in the figure, the movable contact piece 211 rotates clockwise in conjunction with the shaft rotation of the DC motor 23 ( It is designed to rotate forward (forward rotation) or counterclockwise (reverse rotation). Furthermore, when a drive current is supplied to the DC motor 23 in the A direction or the B direction, the irradiation direction of the right lamp changes to the right or left when viewed from the driver's seat in conjunction with the shaft rotation of the DC motor 23. It is designed to rotate and move to . The other ends of relay coils 24 and 25, one end of which is grounded, are connected to the one-stage/two-stage switching terminal 2a and the forward/reverse rotation switching terminal 2b of the right lamp drive unit 2.

The configuration of the right lamp drive unit 2 has been described above, but the left lamp drive unit 3 has a similar configuration, and each part is given a number corresponding to that of the right lamp drive unit 2, and the explanation thereof will be omitted. However, due to the shaft rotation of the DC motor 33 due to the supply of drive current in the direction A or B in the illustration, the irradiation direction of the left lamp rotates to the left or right when viewed from the driver's seat. When the movable contact pieces 211 and 311 of the actuators 21 and 31 are located at the positions shown in the figure, that is, when the rotational angular positions of the DC motors 23 and 33 are located at the initial rotational angular position, When the irradiation directions of the right lamp and the left lamp face straight ahead, and when the movable contact pieces 211 and 311 of the actuators 21 and 3-1 are located at the rightward 15@ or 30'' positions, that is, the DC motors 23 and 33 When the rotational angular position of is located at the first or second rotational angular position, the irradiation direction of the right lamp and the left lamp is at the right steering position 15° and the left steering position 15° or at the right steering position 3.
0'' and the left steering position 30', the shaft rotation of the DC motors 23 and 33 is connected to a variable irradiation direction mechanism (not shown) for the right lamp and the left lamp.

Next, the operation of the vehicle cornering lamp system configured as described above will be explained.

That is, now, the rotation angle positions of the DC motors 23 and 33 in the right lamp drive unit 2 and the left lamp drive unit 3 are stopped at the initial rotation angle positions, that is, the vehicle is driven straight with the irradiation direction of the right lamp and the left lamp facing directly ahead. It is assumed that the vehicle is running. At this time, assuming that the steering wheel is in the straight steering position, the count value in the UP/DOWN counter 12 is zero, and the decoder 13 sets only its output terminal 13h to the rLJ level. That is, the signal (a) to the control logic generation circuit 15,
(bl.

(c), fd>, (e) potential level is rHJ
, rHJ, rLJ.

rHJ and rHJ, and based on the truth table shown above, the potential levels of the signals cw) to (Z) sent from the control logic generating circuit 15 all maintain the rLJ level. In other words, the relay coils 24.2 of the right lamp drive unit 2 and the left lamp drive unit 3
5 and 34.35 are not energized, and the switching mode of the switching circuits 22 and 32 is as shown in figure B.
(first connection mode).

In such a state, when the steering wheel is rotated clockwise to start right steering, the phase 9
A pulsed electrical signal shifted by 0° begins to be input. As a result, the UP/DOWN switching circuit 11 generates and sends out an up signal as shown in FIG. is input. Based on this input up signal, the UP/DOWN counter 12
The count value at is amplified, and the output terminal position of the decoder 13 at the rLJ level is switched from 13h to 13i, 13j, . . . in accordance with this up-count value. The output terminal position at rLJ level of decoder 13 is 13j
When the steering wheel is switched to the right steering position 1, the steering wheel position changes to right steering position 1.
The signal (a) to the control logic generation circuit 15 is assumed to be within the 5° detection range.

(b), (C), (d), the potential levels of tel are rHJ, rLJ, rHJ.

rHJ, rHJ. On the other hand, the rotational position/direction discriminating circuit 14 uses the amplifier signal input via the UP/DOWN switching circuit 11 and the MSB of the count value input via the IP/DOWN counter 12 to
A right reciprocating rotation position/direction determination signal (f) of "H" level is sent. That is, the control logic generation circuit 15
Signals to (a), (b), (cl, (d)
, (el, (r) potential level is rHJ, r
LJ, rHJ, rHJ, rHJ.

rHJ, and the signal is sent from the control logic generation circuit 15 based on the truth table shown above←),
(xl, fV), the potential level of (z) is rL
J, rHJ.

rLJ and rLJ, and the relay coil 25 in the right lamp drive unit 2 becomes energized.

By energizing the relay coil 25, in the switching circuit 22 of the right lamp drive unit 2, the common terminal 25-3 of the normally open/normally closed contact 25-1, the normally open contact terminal 25-rb, and the normally open - The common terminal 25-zc of the normally closed contact 25-2 and its normally open contact terminal 25-□ become electrically connected (the switching mode at this time is the second connection mode), and the initial rotation angle of the DC motor 23 changes. By switching the switching circuit 22 to the second connection mode at the position, the first movable contact portion 21! of the movable contact piece 211 is switched to the second connection mode. , and the first fixed contact portion 212- of the fixed contact piece 212 as a conduction path, a drive current flows in the direction A to the DC motor 23, and the motor 23
rotates forward, and the movable contact piece 211 begins to rotate clockwise. As the movable contact piece 211 rotates clockwise, the power supply to the DC motor 23 is cut off when the movable contact part zti-+ moves further away from the fixed contact part 21L, and the motor rotates an additional 3'' due to inertia. Thereafter, the movable contact piece 211 stops at a rotational angle position of 15 degrees in the right direction (see FIG. 4(a)).

That is, the rotational angular position of the DC motor 23 moves from the initial rotational angular position to the first rotational angular position and stops, and this first rotational angular position is used as the first stage positioning position.
The irradiation direction of the right lamp is switched to the 15° direction of the right steering position.

As the steering wheel continues to be steered to the right, the output terminal position at which the rLJ level of the decoder 13 is reached is 13 m.
When the steering wheel is switched to the right steering position, the steering wheel position changes to right steering position 3.
Assuming that the potential level of the signal (al) to the control logic generation circuit 15 is within the detection range of 0'
becomes. That is, the control logic generation circuit 15
signal to (a).

The potential levels of (b), (c), (d), and (e) are rLJ, rHJ, and rHJ.

rHJ and rHJ, and based on the truth table shown above, the potential levels of the signals ←), (X), (Y), and (Z) sent from the control logic generation circuit 15 are "H".

rHJ, rLJ, rLJ, and the relay coil 24 in the right lamp drive unit 2 becomes energized. By energizing the relay coil 24 combined with this relay coil 25, in the switching circuit 22 of the right lamp drive unit 2, the common terminal 24-+c of the normally open/normally closed contact 24-I and the normally open contact terminal 24 -rb and normally open/normally closed contact 24-F common terminal 24-1c and its normally open contact terminal 24-2. becomes conductive (the switching mode at this time is the third connection mode),
By switching the switching circuit 22 to the third connection mode at the first rotation angle position of the DC motor 23, the second movable contact portion 2 of the movable contact piece 211
114 and the second fixed contact portion 2124 of the fixed contact piece 212
A drive current further flows in the direction A to the DC motor 23 using the contact path with the contact path as a conduction path, the motor 23 rotates forward, and the movable contact piece 211 begins to rotate further clockwise. As the movable contact piece 211 rotates clockwise, the movable contact portion 21
When 1-z separates from the fixed contact part ziz-z, the power supply to the DC motor 23 is cut off, and after rotating an additional 3 degrees due to the inertia, the movable contact piece 211 moves in the right direction 30.
It stops at the rotational angle position of 0.degree. (see FIG. 4(b)). That is, the rotational angular position of the DC motor 23 moves from the first rotational angular position to the second rotational angular position and stops, and the right lamp is irradiated using this second rotational angular position as the second stage positioning position. The direction is now switched to the right steering position of 30 degrees.

When the steering wheel is returned to the left steering direction from this state, the UP/
The phase of the pulsed electrical signal input to the DOWN switching circuit 11 is reversed, and the second signal is input from the LIP/DOWN switching circuit 11.
A down signal as shown in FIG. Based on UP
/DOWN The count value in the counter 12 decreases, and the output terminal position at which the decoder 13 becomes "L" level is 1.
372, the potential level of the signal (b) to the control logic generating circuit 15 becomes rLJ, assuming that the steering wheel position has entered the detection range of the right steering position of 15 degrees again. On the other hand, the rotational position/direction discrimination circuit 14
is the rLJ level right reciprocating rotation position/direction discrimination signal (f) based on the down signal inputted through the UP/DOWN switching circuit 11 and the MSB of the count value inputted through the UP/DOWN counter 12. Send out.

That is, the signals (a), (b), (C), (d), (
The potential levels of e) and (f) are rHJ, rLJ,
rHJ, rHj, rHJ, rL", and the signals (w), (x), (
The potential levels of yl and (z) are rHJ and rLJ.

rLJ and rLJ, and the energized state of the relay coil 25 in the right lamp drive unit 2 is released. By releasing the energized state of the relay coil 25, the switching circuit 2 of the right lamp drive unit 2
2, the common terminal 25-+c of the normally open/normally closed contact 25-3, the normally closed contact terminal 25-, and the normally open/normally closed contact 25-3.
The common terminal 25-1c of the normally closed contact 25-t and the normally closed contact terminal 25-t- become conductive (the switching mode at this time is the fourth connection mode), and the second By switching the switching circuit 22 to the fourth connection mode at the rotation angle position, the fourth movable contact portion 211- of the movable contact piece 211,
and the fourth fixed contact portion 211 . of the fixed contact piece 212 . A driving current flows in the direction B to the DC motor 23 using the contact path with the conductor as a conduction path, and the motor 23 rotates in the reverse direction, causing the movable contact piece 211 to rotate in the opposite direction.
begins to rotate to the left.

As the movable contact piece 211 rotates to the left, the power supply to the DC motor 23 is cut off when the movable contact portion 21L moves further away from the fixed contact portion 212-, and the inertia causes the movable contact portion 21L to rotate an additional 3 degrees. After that, the movable contact piece 211 returns to the rotation angle position of 15° to the right and stops (the fourth
(See figure (C)). That is, the rotational angular position of the DC motor 23 moves from the second rotational angular position to the first rotational angular position and stops, and the rotational angular position of the DC motor 33 is again regulated to the first stage positioning position, and the rotational angular position of the DC motor 33 is regulated to the first stage positioning position. The irradiation direction of the lamp is now switched toward the right steering position 15''.

Then, when the steering wheel is returned to the straight steering direction by further left steering, the steering wheel position enters the detection range of the straight steering position when the output terminal position of the decoder 13, which is at the rLJ level, switches to 13i. As a signal (C) to the control logic generation circuit 15,
The potential level becomes "L". That is, the signals (al, (b),
(C) , (dl, (el potential L/H/L
/ is rHJ, rHJ, rLJ, rHJ, rHJ
Based on the truth table shown above, the signal -1, (X) sent from the control logic generation circuit 15 is
, (V).

The potential level of (Z) is rLJ , rLJ , rLJ ,
rLJ, and the energized state of the relay coil 24 in the right lamp drive unit 2 is released.

By canceling the energized state of the relay coil 24 combined with the relay coil 25, the switching mode of the switching circuit 22 of the right lamp drive unit 2 returns to the first connection mode, and the first rotation of the DC motor 23 occurs. By switching the switching circuit 22 to the first connection mode in the angular position, the movable contact piece 2
The contact path between the third movable contact portion 2114 of No. 11 and the third fixed contact portion 2124 of the fixed contact piece 212 is used as a conduction path,
The drive current further flows in the direction B to the DC motor 23, the motor 23 rotates in the opposite direction, and the movable contact piece 211 begins to further rotate to the left. As the movable contact piece 211 rotates to the left, the movable contact portion 211-3 changes from the fixed contact portion 212-
3, the power supply to the DC motor 23 is cut off, and after rotating an additional 3 degrees due to inertia, the movable contact piece 211 returns to the initial rotation angle position shown in FIG. 1 and stops. That is, the rotational angular position of the DC motor 23 returns from the first rotational angular position to the initial rotational angular position, and the irradiation direction of the right lamp is returned to the direct direction.

When steering to the left starting from the straight-ahead steering position, the control logic generation circuit 15 sends signals ←) to (
Based on the potential level of Zl, the same operation as the above-mentioned operation in the right lamp drive unit 2 is performed in the left lamp drive unit 3, and the irradiation direction of the left lamp is changed in the direction of the left steering position 15'' in conjunction with the steering wheel steering. The left steering position switches to two positions in the direction of 30''.

FIG. 5 is a diagram showing a specific circuit configuration example of the rotational position/direction discrimination circuit 14 and the control logic generation circuit 15 in the vehicle cornering lamp system shown in FIG. The rotational position/direction discrimination circuit 14 is connected to the right reciprocating rotational position/direction discrimination circuit 14-1.
and a left reciprocating rotation position/direction determining circuit 14-2.

The right reciprocating rotation position/direction discrimination circuit 14-8 is tlP/D.
14-z and 14-
I□ and this Nando game) 14-++ and 14-1
Negative logic input OR gate 14-13 whose input is the output of □
and 14-14, and the MSB of the count value sent by the UP/Dol counter 12 is inverted and the Nantes gate 14-+
Inverter 14 connected to + and 14-I□ other end side input
-1s, and negative logic input OR gates 14-, , m outputs are negative logic input OR gates) 14-, ,
In addition to the other end input, negative logic input or game) 1
By making the output of 4-, , negative logic input or game 1-14-, , the human power on the other end side, a right reciprocating rotation position/direction discrimination signal (f ) will be obtained. Further, the left reciprocating rotation position/direction discrimination circuit 144
A Nant gate 144 whose one end input is the down signal and amplifier signal sent out by the P/DOWN switching circuit 11, and the MSB of the count value sent out by the UP/DOWN counter 12 is the other end input. and 14-1, and negative logic input OR gates 14-z3 and 14-2 whose inputs are the outputs of 14-it and 14-2□.
4, and a negative logic human-powered OR gate 14
By making the output of -t3 the other end input of the negative logic manual OR gate 14.4 and the output of the negative logic input OR gate 14-za as the other end input of the negative logic manual OR gate 14-23, the control logic Generation circuit 15
A left/right reciprocating rotation position/direction discrimination signal (g) is obtained as an output to the input terminal 15g.

The control logic generation circuit 15 also receives a signal (
al, (b), (Decoder 15-1 that takes in C1 as a 3-bit input signal and its input terminal 15C
Signal (c) input via 115d and 15e,
(d) A decoder 154 that takes in tel as a 3-bit input signal, and a right reciprocating rotation position/direction determination signal (f) sent out from the output of the decoder 15-1 and the right reciprocating rotation position/direction determination circuit 14-0. A signal processing circuit 15-1 that captures and processes the output of the decoder 15-2 and a left reciprocating rotation position/direction determination signal (gl) sent out from the left reciprocating rotation position/direction determination circuit 14-2. The signal processing circuit 15-3 includes a right reciprocating rotation position/direction determining circuit 14.
AND gates 15-3□ and 15= which directly input the right reciprocating rotation position/direction discrimination signal (f) sent out by -1 and invert it by inverter 15-:+1 and use it as one end input.
: +z and this AND gate 15-3□ and 15-3
An inverter 15-3- which inverts the output obtained from the output terminal i5-1m of the decoder 15 and inputs it to the other end of the decoder 15-3.
and AND gates 15, 2 and 15-3. An or game in which the output of 15-+s and 15-
36, and an inverter 15-. . . which inverts and inputs the output obtained from the output terminal 15- of the decoder 15 to the other end side of the OR gates 15-+s and 15-. 7, and by the signal processing operation in this signal processing circuit 15-3, the output terminals 15w and 15
Signals [W] and (Xl) are obtained from x.

The signal processing circuit 15-4 receives the left reciprocating rotation position/direction determination signal (
gl directly and inverter 15-4. AND gate 15-i 2 and 1 which is inverted by
! 143 and this AND gate 15-4□ and 15
−． an inverter 15-4 which inverts and inputs the output obtained from the output terminal 15-2□ of the decoder 15 to the other end of the decoder 3;
4, and an OR gate 15-4 whose one end input is the output of the AND gates 15-, □, and 15-4z. and 1
5-, and this or gate l5-45 and 15-,
, an inverter 15-4- which inverts the output obtained from the output terminal 15-zb of the decoder 15 and inputs it to the other end side.
1, and this signal processing circuit 15-4
By the signal processing operation in, signals (y) and (Z) are obtained from the output terminals 15y and 15z.

In the present embodiment, the switching circuits 22 and 32 in the lamp drive units 2 and 3 are configured by the normally open and normally closed contacts of the relay coils 24.25 and 34.35, but for example, transistors, etc. Needless to say, the structure may be constructed using non-contact switching elements. Furthermore, in this example,
Although the configuration is such that the irradiation direction of the headlights is varied in conjunction with steering wheel steering, the object whose position is varied to the two-step positioning position is not limited to the irradiation direction of the headlights.

〔Effect of the invention〕

As explained above, according to the two-step steering interlocking system according to the present invention, the straight steering position of the steering wheel and the predetermined rotation angle α from this straight steering position are determined based on the up-down signals generated in conjunction with steering wheel steering.
and a second steering position separated by a predetermined rotation angle β from the first steering position, and an up-down signal generated in conjunction with the steering wheel steering. The steering direction of the steering wheel is determined based on the steering direction of the steering wheel, and based on the detection result of the steering wheel steering position and the determination result of the steering wheel steering direction, when detecting the straight steering position, a first mode signal is transmitted.
A second mode signal when detecting the first steering position by steering the steering wheel from the straight steering position side, a third mode signal when detecting the second steering position,
When detecting the first steering position by steering the steering wheel from the second steering position side, a fourth mode signal is sent out, and according to the first to fourth mode signals sent out, A switching means is provided for switching the switching mode to a first to a fourth connection mode, and in the first connection mode of the switching means, the rotational angular position of the actuator is located at an initial rotational angular position,
By switching from this initial rotational angular position to the second connection mode, the actuator is moved to a first rotational angular position that is separated by α1 from this initial rotational angular position.

- the actuator is moved to a second rotational angular position separated by β1 from the first rotational angular position by switching from the first rotational angular position to the third connection mode. By switching from the second rotational angular position to the fourth connection mode, the rotational angular position of the actuator is changed to the first rotational angular position that is away from the second rotational angular position by the distance β1. Since the position is made to be different, the rotational angular position of the actuator can be varied to two positioning positions with respect to the initial rotational angular position based on the connection mode of the switching means whose switching mode is changed in conjunction with steering wheel steering. If this actuator can be used to vary the irradiation direction of the headlight, the configuration will be simpler than a conventional system that uses a servo motor or the like to continuously change the irradiation direction. , it becomes possible to construct a low-cost and highly reliable irradiation direction variable system.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a cornering lamp system for a vehicle to which a two-stage steering interlocking system according to the present invention is applied, and FIG. 2 is a circuit diagram showing the rotational position/direction determination in this cornering lamp system. A timing chart showing input/output signals to the circuit, FIG. 3 is an enlarged layout diagram of a dedicated pattern in the actuator that constitutes the lamp drive unit in this cornering lamp system, and FIG. 4 is for explaining the operation of this actuator. 5 is an exploded operation diagram of the vehicle cornering lamp system shown in FIG.
FIG. 3 is a diagram showing a specific circuit configuration example of a direction determination circuit and a control logic generation circuit. 1... Controller, 2... Right lamp drive unit, 3... Left lamp drive unit, 11... UP/D
OWN switching circuit, 12... UP/DOWN counter, 13... Decoder, 14... Rotational position/direction discrimination circuit, 15... Control logic generation circuit, 21
．． 31... Actuator 22.32... Switching circuit, 23.33... DC motor, 24, 25,
34.35...Relay coil. Patent applicant: Koito Manufacturing Co., Ltd.

Claims (1)

[Claims] Based on an up-down signal generated in conjunction with steering wheel steering, a straight steering position of the steering wheel, a first steering position separated from this straight steering position by a predetermined rotation angle α, and this first steering position. a steering position detection means for detecting a second steering position that is separated from the steering position by a predetermined rotation angle β; and a steering direction that determines the steering direction of the steering wheel based on an up-down signal generated in conjunction with the steering wheel steering. a determining means; and based on the determination result of the steering direction determining means and the detection result of the steering position detecting means, when detecting the straight steering position, a first mode signal is transmitted by the steering wheel from the straight steering position side. When the first steering position is detected, the second mode signal is transmitted, and when the second steering position is detected, the third mode signal is transmitted. mode signal sending means for sending out a fourth mode signal when detecting the first steering position; and mode signal sending means for sending out a fourth mode signal; to fourth
a switching means for switching to a connection mode; and a first connection mode of the switching means in an initial rotational angular position, in which the switching means is switched to a second connection mode. α1 from the initial rotation angle position
the switching means is switched to a third connection mode in this first rotational angular position, thereby connecting the switching means to a second rotational angular position separated by β1 from the first rotational angular position. , and the switching means is switched to the fourth connection mode at this second rotational angular position, whereby a first rotational angular position is located at a distance of β1 from the second rotational angular position. a two-stage actuated steering interlock system comprising actuator means located at