JPS63305052A - Apparatus for controlling position of rotor stopped - Google Patents

Abstract

PURPOSE:To prevent a rotor to be controlled from deviation to the clockwise side in stopping a motor by providing a forced rotary means rotably returning after rotating said rotor continuously counterclockwise in an apparatus for stopping the rotation of said rotor in positions of first and second conductor patterns contacting and leaving a common contact. CONSTITUTION:When a motor 18 is rotated counterclockwise, a conductor pattern 2a leaves and contacts a slide contact 3, the motor is continuously rotated even thereafter. And when a conductor pattern 2b contacts the slide contact 3, the motor 18 is rotatably returned clockwise. Thereafter, current supply to the motor 18 is shut off to stop the irradiating direction of a head lamp. Thus, the irradiating direction is deviated counterclockwise, i.e. toward the road shoulder side from the right front direction. Thus, no dazzlement is given to a car running on the opposite lane.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for controlling the stop position of a rotating body suitable for use in a cornering lamp system for a vehicle that changes the irradiation direction of a headlamp in conjunction with steering wheel steering. It is related to the device.

[Conventional technology]

In recent years, various cornering lamp systems have been proposed in which the direction of illumination of headlights is varied in conjunction with steering wheel steering. These cornering lamp systems are configured to, for example, drive a stepping motor to vary the irradiation direction of the headlights, and automatically correct for deviations in the rotational position of the stepping motor, resulting in straight-line steering. There has also been proposed a device with an added control function that allows the irradiation direction of the headlight to always match the front of the vehicle (front direction).

FIG. 3 is an example of a rotational direction detector used to automatically correct rotational positional deviation of the stepping motor. In the figure, 1 is a rotating disk made of an insulating member;
2a and 2b are semicircular conductor patterns formed on the upper surface of the rotating disk 1. As shown in FIG. Conductor patterns 2a (first conductor pattern) and 2b (second conductor pattern)
are formed with their peripheral edges facing each other with a predetermined distance between them, and the conductor patterns 2a and 2b
Sliding contacts 3, 4, and 5 are held in pressure contact with each other on a rotation locus centered on the zero point. That is, the sliding contacts 4 and 5 are configured at rotational angle positions of 90 degrees on both sides with the sliding contact 3 as a reference, and by rotation of the rotating disk 1 in the left-right direction in the drawing about the 0 point, The conductor patterns 2a and 2b rotate while slidingly contacting the sliding contacts 3, 4, and 5. The sliding contact 3 is grounded to constitute a common terminal, and the sliding contacts 4 and 5 are connected to a high potential power source via resistors R1 and R2, and the sliding contact 4 and the resistor R1 are connected to each other. A first output terminal 6 is arranged at the point, and a second output terminal 7 is arranged at the connection point between the sliding contact 5 and the resistor R2.

Next, a method for detecting the rotational direction of a rotating body using the rotational direction detector configured as described above will be described. That is,
The rotating disk 1 of this rotational direction detector is fixed to the output shaft of a stepping motor (not shown) that changes the direction of irradiation of a rotating body to be detected, that is, a headlamp, so as to rotate around a zero point. That is, at the center of rotation of the output shaft of the stepping motor in the clockwise and counterclockwise directions, the sliding contact 3 is fixed so as to be located within the opposing slit portion 8 of the conductor patterns 2a and 2b as shown in the figure.

Therefore, when the output shaft of the stepping motor is at the center of rotation and the direction of illumination of the headlight matches the front direction of the vehicle, sliding contacts 4 and 5 of the rotation direction detector are aligned with sliding contact 3. The output terminals become non-conductive, and the voltage levels at output terminals 6 and 7 both become "H" level.

When the stepping motor is rotated clockwise from this state, the rotating disk 1 rotates clockwise around the 0 point, and the sliding contact 3 moves toward the conductor pattern 2a.
The sliding contacts 4 and 3 begin to make sliding contact with each other, and the sliding contacts 4 and 3 become electrically connected using the conductive pattern 2a as a conductive path. Therefore, the voltage level of the output terminal 6 is inverted to the rLJ level.

At this time, the voltage level of the other output terminal 7 is maintained at the rHJ level because the peripheral end of the conductor pattern 2b moves away from the sliding contact 3.

On the other hand, when the stepping motor rotates counterclockwise with respect to its center of rotation and the rotating disk 1 rotates to the left, the sliding contact 3 begins to come into sliding contact with the conductor pattern 2b, using the conductor pattern 2b as a conductive path. The contact 5 and the sliding contact 3 become electrically connected. Therefore, the voltage level of output terminal 7 is inverted to "L" level. At this time, the voltage level of the output terminal 6 is maintained at the rHJ level because the peripheral edge of the conductive pattern 2a moves in a direction away from the sliding contact 3.

The above table is a truth table of the detection signal obtained in this way, where Rout indicates the voltage signal obtained via the output terminal 6, Lol indicates the voltage signal obtained via the output terminal 7, and stepping The voltage signal level is shown in association with the rotational state of the motor. That is, based on the combination of voltage signal levels obtained through the output terminals 6 and 7, the rotational movement position with respect to the rotation center of the stepping motor can be recognized, and the rotation of the stepping motor at the straight-ahead steering position of the vehicle can be recognized. For misalignment,
Always R0U? Andri. In order to bring u7 to rHJ level,
By forcibly rotating the stepping motor, the direction of illumination of the headlights is automatically corrected. In other words, in the straight steering position, if the rotational movement position of the stepping motor is shifted clockwise or counterclockwise with respect to its center of rotation, the stepping motor is forcibly rotated counterclockwise or clockwise, and the rotation direction detector The rotation of the stepping motor is stopped when the conductive pattern 2a or 2b and the sliding contact 3 come into contact with each other.

In such a rotational direction detector, the interval (slit width) h between the opposing slits 8 on the rotating disk 1 and the sliding contact 3
The following contradictory phenomena occur due to the correlation between

That is, if the sliding contact 3 is large relative to the slit width, the positional accuracy is good, but overrun or short circuit may occur.

If the sliding contact 3 is small relative to the slit width, overrun or short circuit will not occur, but positional accuracy will deteriorate.

When using such a rotational direction detector, an overrun or short circuit becomes a destructive mode, so in general, the sliding contact 3 is designed to be sufficiently small relative to the slit width even if the position accuracy is lowered. There is.

[Problem that the invention seeks to solve]

However, according to such a cornering lamp system, as described above, the sliding contact 3 in the rotation direction detector is designed to be sufficiently small with respect to the slit width, so that the headlight at the straight-ahead steering position is The correction position of the irradiation direction differs depending on whether the automatic correction of the irradiation direction of the lamp is performed by forced clockwise rotation of the stepping motor or by forced rotation of the stepping motor counterclockwise. In other words, when the stepping motor is forcibly rotated clockwise and stopped at a position where the conductor pattern 2b and the sliding contact 3 come into contact with each other, the irradiation direction of the headlight will be slightly counterclockwise with respect to the direction directly ahead. It slips away. In addition, when the stepping motor is forcibly rotated counterclockwise and stopped at a position where the conductor pattern 2a and the sliding contact 3 come into contact with each other, the irradiation direction of the headlight is slightly clockwise with respect to the direction directly ahead. It slips away. If the headlight illumination direction deviates counterclockwise (toward the roadside) in the straight-ahead steering position, this will not cause much of a problem, but
On the other hand, if it deviates clockwise, there is a risk of dazzling oncoming vehicles, which poses a problem.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and is designed to continuously move the controlled rotating body in a continuous manner, regardless of whether the first conductive pattern connects or disconnects from the common contact due to the counterclockwise rotation of the first conductive pattern. It is rotated clockwise so that the second conductor pattern comes into contact with the common contact, and then reversed and rotated back clockwise.

[Effect]

Therefore, according to the present invention, the controlled rotating body continues to be rotated counterclockwise regardless of whether the first conductor pattern comes into contact with or leaves the common contact, and after the second conductor pattern comes into contact with the common contact. The return rotation in the clockwise direction causes the controlled rotating body to stop at the contact/separation position with respect to the common contact of the second conductor pattern.

〔Example〕

Hereinafter, the stop position control device for a rotating body according to the present invention will be explained in detail. FIG. 1 is a schematic diagram of a vehicular cornering lamp system showing an embodiment of this rotary body stop position control device. In the figure, reference numeral 9 indicates a voltage signal R0tl? sent from output terminals 6 and 7 of the rotation direction detector.
Andri. It is a decoder that receives u7 as an input, and outputs a voltage signal R0U? Andri. When uT is rLJ and rHJ, its output terminal 9a becomes rHJ level, and rHJ and r
When LJ is present, the output terminal 9b is at the rHJ level, and when both are at rHJ, the output terminal 9C is at the "H5" level. Output terminals 9a, 9b of decoder 9
The signals sent out from AND gates 10a, 10b and 10c are input to one end of AND gates 10a, 10b and 10c, respectively.
The other end of c is connected to the horse mackerel stock (A) via the input terminal 11a.
DJIJST) signal is input. This adjustment signal is a signal that is at the rHJ level when the steering wheel (not shown) is in the straight steering position, and is connected to the AN via one end of the three-man power AND gate 10d and the inverter 12a.
It is also input to one end of the D gate 108.1Of and Log. The reference clock signal is input to one of the remaining two inputs of the AND game 10d via the oscillator 13, and the output of the OR gate 14a is input to the other. A steering direction signal (hereinafter referred to as an R/L signal) is input to the other end of the AND gate 10f via an input terminal 11b, and this R/L signal is ANDed via an inverter 12b. It is also input to the other end of the game) 10e. The R/L signal input via the terminal 11b is
rHJ level or rL depending on the steering direction of the steering wheel.
This signal becomes the J level, and in this embodiment, when the steering wheel is rotated to the right, the signal becomes the rHJ level, and when the steering wheel is rotated to the left, the signal becomes the rLJ level. Also, A
The other end of the ND gate lOg receives, via the input terminal 11c, a number of rectangular wave electric signals (
(hereinafter referred to as a control signal) is input, and the outputs of AND gates 10g and 10d are
Stepping motor drive circuit 1 via R gate 14b
The signal is input to the control input terminal 15a of No. 5.

On the other hand, the outputs of the AND gates 10a, 10b, and 10C are input to one-shot multivibrators 16a, 16b, and 16c, respectively, and the output of the one-shot multivibrator 16a is the center terminal of the R-S flip-flop 17a. , the output of the one-shot multi-by-break 16b is connected to the flip-flop 17.
a reset terminal and R-S flip-flop 17b
The output of the one-shot multivibrator 16c is input to the reset terminal of the flip-flop 17b.

The Q outputs of the flip-flops 17a and 17b are manually inputted to one end and the other end of the OR gate 14a. Furthermore, the Q outputs of flip-flops 17a and 17b are AND gates t-10e and 10f.
The output of the OR gate 14c and 14d is also input to the other end of the OR gate 14c and 14d, and the output of the OR gate 14c and 14d is input to the mode signal input terminal of the stepping motor drive circuit 15. 15b and 15c. 18 is a four-phase stepping motor, and this stepping motor 18
The irradiation direction of a headlamp (not shown) can be varied by the rotational force of the headlamp. That is, the coils L1 to L4 of this stepping motor 18 have LL-L2-L3-L4.
By supplying power in this order, the output shaft (not shown) of the motor rotates clockwise and the direction of illumination of the headlight is varied to the right when viewed from the driver's seat.
By supplying power in the order of 4-L3-L2-L1, the output shaft rotates counterclockwise and the direction of illumination of the headlight is varied to the left. As the stepping motor 18 rotates clockwise and counterclockwise, the rotating disk l of the rotation direction detector rotates to the right (clockwise) and to the left (counterclockwise). The direction and amount of power supplied to each coil of the stepping motor 18 are determined by the buffer 19.
It is controlled by a stepping motor drive circuit 15 connected via 2 to 19d. That is, the stepping motor drive circuit 15 has the OR gate 1
4c, while the rHJ level signal is input to the mode signal input terminal 15b, L4-L is applied to the coils L1 to L4 of the stepping motor 11-18.
Supply power in the order of 3-L 2-Ll and OR
rH to the mode signal input terminal 15c via the gate 14d.
While the J level signal is being input manually, the coils L1 to L4 of the stepping motor 18 are connected to Ll-L2-L.
Power is supplied in the order of 3-L4,
The amount of power supplied is determined by the number of pulses of the signal input to the control input terminal 15a via the OR gate 14b. In addition, the stepping motor 18
The other ends of the coils Ll to L4 are connected to a high potential power source.

Next, the operation of the cornering lamp system configured as described above will be explained. That is, it is assumed that the steering wheel is currently in a straight-line steering state, the rotating disk 1 of the rotation direction detector is located at its center of rotation as shown in the figure, and the direction of irradiation of the headlight is facing directly ahead. At this time, the adjustment signal input through the terminal 11a is at the rHJ level at the straight steering position of the steering wheel (hereinafter, this position is referred to as the steering wheel center), as shown in FIG. 2(d). , Therefore, the output of the AND gate Log is at the rLJ level based on the inverted output of the inverter 12a. Also, at this time, output terminals 6 and 7 of the rotation direction detector
Voltage signals R6UT and RI are sent out from R6UT. U? are both at the rHJ level, so only the output terminal 9c of the decoder 9 is at the "H" level (see Figure 2 (C1
).

In this situation, if you turn the handle, for example, to the right,
The R/L signal input through the terminal flb goes to "H" level (Fig. 2(e)), and then the adjustment signal goes to r.
It becomes LJ level (point a in Fig. 2(d)). As a result, both the two inputs of the AND gate 10f become rT (J level), and a signal of rHJ level is inputted to the mode signal input terminal 15c of the stepping motor drive circuit 15 via the OR gate 14d (see FIG. (h)). Also,
When the adjustment signal reaches rLJ level, inverter 1
The signal input to the AND gate 10g via 2a is r
The control signal (FIG. 2(f)) that becomes HJ level and is input via the terminal 11c passes through the AND gate Log and is input to the control input terminal 15a of the stepping motor drive circuit 15 via the OR gate 14b. It becomes like this. Therefore, the stepping motor drive circuit 15 supplies power to the coils L1 to L4 of the stepping motor 18 in the order of Ll-L2-L3-L4 by an amount corresponding to the number of pulses of the control signal input to the control input terminal 15a. As a result, the direction of illumination of the headlight is rotated in the same direction as the direction of rotation of the handle, that is, to the right. As the headlight rotates to the right in the direction of illumination,
The rotating disk l of the rotation direction detector rotates clockwise, and the voltage signal R80f sent from the output terminal 6 becomes rLJ level.

At this time, the voltage signal sent from the output terminal 7. u7 is r
The HJ level is maintained, so the level of the output terminal 9C of the decoder 9 becomes rLJ, and the level of the output terminal 9a becomes rHJ (FIG. 2(a)).

On the other hand, when the steering wheel is rotated counterclockwise about the steering wheel center, the R/L signal input through the terminal 11b becomes rLJ, and then the adjustment signal becomes rLJ level (b in Fig. 2(d)). point).

As a result, the two forces of AND gate lOe are both rHJ
level, and the rH level is applied to the mode signal input terminal 15b of the stepping motor drive circuit 15 via the OR gate 14c.
J level signal will be input (Figure 2 (phantom)
. Further, when the adjustment signal becomes rLJ level, the control signal inputted manually through the terminal 11c passes through the AND gate 10g and is passed through the control input terminal 15 of the stepping motor drive circuit 15 through the OR gate 14b.
It will be input to a. Therefore, the stepping motor drive circuit 15 applies the coils L4-L3-L2 of the stepping motor 18 by an amount corresponding to the number of pulses of the control signal input to the control input terminal 15a.
Power is supplied in the order of -Ll, thereby rotating the direction of illumination of the headlight in the same direction as the direction of rotation of the steering wheel, that is, to the left. As the headlight rotates to the left in the irradiation direction, the rotating disk l of the rotation direction detector rotates to the left, causing a voltage signal to be sent from the output terminal 7. UA becomes rLJ level. At this time, the voltage signal sent from the output terminal 6 maintains the R0□rHJ level, so the level of the output terminal 9c of the decoder 9 becomes "L", and the level of the output terminal 9b becomes rHJ (see Figure 2). ).

The above operation was explained when the steering wheel was rotated clockwise and counterclockwise around the center of the steering wheel, but it also applies to the case where the steering wheel is rotated clockwise and then counterclockwise, or when it is rotated counterclockwise and then clockwise. However, it goes without saying that the direction of illumination of the headlights can be varied in conjunction with steering wheel steering. That is, when the handle is rotated clockwise and then counterclockwise, the R/L signal input through the terminal llb is inverted from the rHJ level to the rLJ level, and the gate of the AND gate 10r closes and the gate of the AND gate 10e opens. , Therefore, the input signal to the mode signal input terminal 15c via the OR gate 14d is inverted to the rLJ level,
An rHJ level signal is now input to the mode signal input terminal 15b.

As a result, the stepping motor drive circuit 15 drives the coil L1 of the stepping motor 18 by an amount corresponding to the number of pulses of the control signal input to the control input terminal 15a.
- Power is supplied to L4 in the order of L4-L3-L2-Ll, the output shaft of the stepping motor 18 rotates counterclockwise, and the direction of illumination of the headlight is the same as the direction of rotation of the handle. , that is, rotate to the left. Similarly, when the steering wheel is rotated to the left and then to the right, the R/L signal input through the terminal 11b is inverted from the rLJ level to the fHJ level, the AND gate 10e closes, and the AND Gate 10f opens. Therefore, the stepping motor drive circuit 15 connects the coils L1 to L4 of the stepping motor 18 with LL-L2.
Power is supplied and supplied in the order of -L3-L4, the output shaft of the stepping motor 18 is rotated clockwise, and the irradiation direction of the headlight is rotated to the right.

By the way, in a cornering lamp system that performs such an operation, there is a risk that the stepping motor 18 will make a misstep due to electrical noise or disconnection, and if such a misstep occurs, the steering wheel will be moved to its center position. When the vehicle is returned to the original position, a problem arises in that the direction of illumination of the headlights does not match the direction to the front. but,
Even if the stepping motor 18 makes a misstep and a rotational position shift occurs, an operation is automatically performed to correct the rotational position shift at the handle center position.

In other words, the stepping motor 18 has caused a misstep and when the steering wheel is rotated clockwise and returned to the center position, the direction of illumination of the headlights does not match the front direction and is slightly deviated to the left. shall be taken as a thing. At this time,
The output shaft of the stepping motor 18 is located at a rotation angle position slightly counterclockwise from its rotation center, and accordingly, the rotating disk 1 of the rotation direction detector is also located slightly to the left of its rotation center. The part is placed in a deviated rotational angle position. That is, at this time, the voltage signal R0U sent out from the output terminals 6 and 7 of the rotation direction detector? and LOLI'r is
It is detected that the stepping motor 18 is in the rHJ and rLJ level states, and that the center of rotation of the stepping motor 18 is still located in the counterclockwise direction. Therefore, even after the steering wheel returns to the steering wheel center position, the decoder 9 continues to operate at its output terminal 9b.
Continue to send out a signal at a higher rHJ level. On the other hand, when the steering wheel returns to the steering wheel center position, the adjustment signal input through the terminal 11a becomes rHJ level, and the AN
The gate of D gate 10b opens and flip-flop 17
b is set via the one-shot multi-bye break 16b. As a result, the Q of the flip-flop 17b is
The output becomes rHJ level, and the rHJ level signal is subsequently input to the mode signal input terminal 15c of the stepping motor drive circuit 15 via the OR gate 14d.

Also, when the adjustment signal reaches rHJ level, AND
The gate of the gate Log is closed and the passage of the control signal via the terminal 11c is blocked, but at this time, since the Q output of the flip-flop 17b is at the rHJ level, the output of the OR gate 14a is at the rHJ level and the AN
The gate of D gate 10d opens, and this AND gate 10
A reference clock signal sent from the oscillator 13 passes through d and is input to the control input terminal 15a of the stepping motor drive circuit 15 via the OR gate 14b. therefore,
The stepping motor drive circuit 15 applies Ll to the coils L1 to L4 of the stepping motor 18 in response to a reference clock signal inputted via the oscillator 13 and an "H" level signal inputted manually via the mode signal input terminal 15c.
- Continue to supply power in the order of L2-L3-L4, rotate the output shaft of the stepping motor 1B clockwise, and rotate the irradiation direction of the headlight to the right. As the stepping motor 18 rotates clockwise,
The rotating disk 1 of the rotation direction detector also rotates clockwise, and its conductor pattern 2b eventually comes into contact with and away from the sliding contact 3. At this time, the voltage signal R6at input to the decoder 9
Andri. Both UTs become rHJ level, and the level of their output terminal 9b becomes [L], and at the same time, the level of their output terminal 9c becomes rHJ. As a result, the flip-flop 17b becomes the one-shot multipipe rake 16
c, this flip-flop 17b
Q output becomes rLJ level, AND gate lOd
The gate of oscillator 13 is closed, and passage of the reference clock signal sent out by oscillator 13 is blocked. Therefore, at this point, the power supply to the stepping motor 18 is cut off, and the headlights stop pointing in the front direction. In other words, even if the stepping motor 18 makes a misstep,
The rotational position deviation is automatically corrected at the handle center position. At this time, since the slit width of the rotation direction detector is set larger than the sliding contact 3, the irradiation direction of the headlight is slightly deviated counterclockwise from the direction directly ahead. Since the deviation in the illumination direction is toward the road shoulder, it does not cause a problem that dazzles oncoming vehicles.

On the other hand, when the steering wheel is rotated counterclockwise and returned to the steering wheel center position, if the illumination direction of the headlights does not match the front direction and deviates to the right, voltage signal R0tI7 is input to the decoder 9. Andri. ut is rLJ and rH
J level, its output terminal 9a becomes rHJ level, flip-flop 17a is set via one-shot multivibrator 16a, and its Q output becomes rHJ level.
HJ level is reached, and the OR gate 14C is connected to the mode signal input terminal 15b of the stepping motor drive circuit 15.
An rHJ level signal is input via the rHJ level signal.

Furthermore, the gate of the AND gate 10d is opened by the Q output of the rHJ level of the flip-flop 17a, and the AND gate 10d is opened.
The reference clock signal sent from the oscillator 13 passes through the gate 10d and is input to the control input terminal 15a of the stepping motor drive circuit 15 via the OR gate 14b. Therefore, the stepping motor drive circuit 15 controls the coils L1 to L1 of the stepping motor 18 by the reference clock signal inputted via the oscillator 13 and the rHJ level signal inputted via the mode signal input terminal 15b.
Power is continuously supplied to L4 in the order of L4-L3-L2-Ll, the output shaft of the stepping motor 18 is rotated counterclockwise, and the irradiation direction of the headlight is rotationally moved to the left. As the stepping motor 18 rotates counterclockwise, the rotating disk 1 of the rotation direction detector also rotates counterclockwise, and the conductor pattern 2a eventually comes into contact with and away from the sliding contact 3. At this time, the voltage signal R0U? input to the decoder 9? Andri. U, both reach the rHJ level, and at the same time, the level of the output terminal 9a becomes rLJ, and at the same time, the level of the output terminal 9C becomes rHJ.

With this, one shot multi-by break 16c
sends out a trigger signal, but this trigger signal is input only to the reset terminal of flip-flop 17b, so
The flip-flop 17a maintains its set state and continues to input the rHJ level signal to the mode signal input terminal 15b of the stepping motor drive circuit 15. That is, even after the conductor pattern 2a is brought into contact with and separated from the sliding contact 3, the stepping motor 18 continues to rotate in the counterclockwise direction. When the conductor pattern 2b comes into contact with the sliding contact 3, the level of the output terminal 9C becomes rLJ and at the same time the level of the output terminal 9b becomes rH.
J, flip-flops 17a and 17b are reset and set via one-shot multivibrator 16b, and their Q outputs become rLJ and rHJ levels. As a result, the levels of the mode signal input terminals 15b and 15c in the stepping motor drive circuit 15 become rLJ and rHJ levels, and the rHJ level signal input via the mode signal input terminal 15c and the signal input via the oscillator 13 In response to the reference clock signal, the stepping motor 18 is reversed and rotated back clockwise. And this stepping motor 1
When the conductor pattern 2b of the rotation direction detector comes into contact with and separates from the sliding contact 3 due to the clockwise return rotation of 8,
The level of the output terminal 9b becomes rLJ, and at the same time the level of the output terminal 9c becomes rHJ, which causes the flip-flop 17b to become the one-shot multivibrator 1.
6c, its Q output becomes rLJ level, the gate of AND gate 10d is closed, and oscillator 1
Passage of the reference clock signal sent out by No. 3 is now blocked. That is, at this point, the stepping motor 18
The power supply to the headlamp is cut off, and the headlight's illumination direction stops at the same direction as when the handle is rotated clockwise and returned to its center position. In other words, even if you turn the steering wheel to the left and return it to its center position, it will be in the same direction as when you turn it to the right and return it to its center position, that is, it will be in the same direction as when you turn the steering wheel to the right and return it to its center position. Since the direction of the headlight's irradiation stops when the headlight shifts, it does not dazzle oncoming vehicles.

Although this embodiment has been described as being applied to a vehicle that drives on the left, it goes without saying that it can be similarly applied to a vehicle that drives on the right. This can be dealt with simply by exchanging the movement and the movement to the left. In addition, although this embodiment has been described as an example in which it is applied to a cornering lamp system using a stepping motor, the application is not limited to a stepping motor type cornering lamp system, and can be applied to stop position control of general rotating bodies. Needless to say, it is.

〔Effect of the invention〕

As explained above, according to the stop position control device for a rotating body according to the present invention, the controlled rotation continues regardless of the contact and separation of the first conductive pattern with respect to the common contact due to the counterclockwise rotation of the rotating body. The body was rotated counterclockwise so that the second conductive pattern came into contact with the common contact, and then reversed and rotated back clockwise, so that the distance between the first conductive pattern and the common contact was reduced. Regardless of the contact, the controlled rotating body continues to rotate in the counterclockwise direction, and after the second conductor pattern contacts the common contact, the controlled rotating body rotates back in the clockwise direction. When the conductor pattern stops at the contact/separation position with respect to the common contact and this is applied to a cornering lamp system, no matter which direction the steering wheel is returned to the straight steering position, from the left or right, the headlight illumination direction will be directed directly ahead. The vehicle can be stopped at a position in the same direction slightly shifted to the road shoulder, and it is possible to prevent oncoming vehicles from being dazzled when steering straight ahead.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a cornering lamp system for a vehicle showing an embodiment of the stop position control device for a rotating body according to the present invention, Fig. 2 is a time chart explaining the operation of this cornering lamp system, and Fig. 3 1 is a schematic configuration diagram showing one embodiment of a rotational direction detector used in this cornering lamp system. 1... Rotating disk, 2a, 2b... Conductor pattern, 3
...Sliding contact, 9...Decoder, 10a~Log・
・・AND gate, 13 ・・oscillator, 14a ~ 14
d...-OR gate, 15... Stepping motor drive circuit, 16a-16C... One-shot multivibrator, 17a, 17b... R-S flip-flop, 18... Stepping motor. Figure 2

Claims (1)

[Claims] A first conductor pattern that contacts the common contact at a position of rotational movement in a clockwise direction with respect to the rotational center of the controlled rotating body, and a first conductive pattern that contacts the common contact at a position of rotational movement in a counterclockwise direction with respect to the rotational center of the controlled rotating body. and a second conductive pattern in contact with the common contact, and the controlled rotating body at the contact and separation positions of the first and second conductive patterns with respect to the common contact as the controlled rotating body rotates counterclockwise and clockwise. In a stop position control device for a rotating body that stops the rotation of the rotating body, the controlled rotating body continues to move in the counterclockwise direction regardless of whether the first conductive pattern comes into contact with or separates from the common contact due to the rotation of the controlled rotating body in the counterclockwise direction. A stop position control device for a rotary body, characterized in that a forced rotation means is provided for rotating the body so that the second conductor pattern comes into contact with a common contact, and then reversing and rotating the body back in a clockwise direction.