JPH0221976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an illumination angle adjustment device for a vehicle headlamp. Specifically, it relates to an adjustment device that can adjust the irradiation angle of the headlights, which are tiltably held relative to the vehicle body, in multiple stages by remote control from the driver's seat, etc., and uses a simple control circuit and mechanism. It is an object of the present invention to provide a novel vehicular headlamp illumination angle adjustment device that can perform stable adjustment operations.

BACKGROUND TECHNOLOGY In vehicles, especially automobiles, the body and axle are connected by a suspension system consisting of leaf springs, coil springs, etc. Therefore, when a large load is applied to the front or rear side of the vehicle body, the posture of the vehicle body changes. The front of the vehicle is sunk forward or backward, and the angle of illumination of the headlight relative to the road surface changes, impairing driving safety. There is a danger that the driver will be seriously dazzled.

Purpose of the Invention Therefore, an object of the present invention is to provide an adjustment device that can adjust the irradiation angle of a headlamp by remote control from the driver's seat, and in particular, it is an object of the present invention to provide an adjustment device that can adjust the irradiation angle of a headlight by remote control from the driver's seat. Therefore, it is an object of the present invention to provide a novel vehicular headlamp illumination angle adjustment device that can perform stable adjustment operations.

Summary of the Invention In order to achieve the above-mentioned object, the present invention includes a headlamp that is tiltably held relative to a vehicle body, a drive unit that tilts the headlight, and an operation unit that operates the drive unit. The drive section includes a motor, a drive body that is moved relative to the vehicle body by the motor and is connected to a part of the headlight, and a multi-stage switching control section, and the operation section includes a movable contact and a movable contact. including an operation switch equipped with a plurality of switching contacts that can be used to switch connections;
The multi-stage switching control unit includes a plurality of fixed contacts each connected to the plurality of switching contacts, and a rotating plate that rotates in contact with the fixed contacts, and the rotating plate rotates relative to the plurality of switching contacts according to the movement of the driving body. Approximately 180 mm of the circular conductive area that is rotated and comes into contact with the plurality of fixed contacts.
Two approximately semicircular conductive parts are formed by removing different parts, and a motor drive relay is connected to each conductive part, and the movable contact of each relay is inserted into the motor drive circuit. and these contacts are short-circuited when both of the two relays are de-energized, so that when either one of the relays is energized, the motor rotates in the forward direction, and when the other is energized, the motor is rotated in the forward direction. When the movable contact of the operation switch is connected to one of the fixed contacts, the motor is connected to the power supply circuit so as to cause the motor to rotate in reverse. When a relay connected to one of the conductive parts is energized, thereby causing the motor to rotate forward or reverse, and the contact between the fixed contact and the conductive part is separated due to the rotation of the rotating plate accompanying the rotation of the motor. It is characterized by stopping the rotation of the motor.

By doing this, the illumination angle of the headlight can be adjusted in multiple stages using only a few members with a simple structure, and a new vehicle front headlight that can perform stable adjustment operations is created. It is possible to provide a light irradiation angle adjustment device.

Embodiments Hereinafter, details of the irradiation angle adjustment device for a vehicle headlamp according to the present invention will be described with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a diagram illustrating the entire irradiation angle adjustment device for a vehicle headlamp according to the present invention, which is composed of a headlamp 1, a driving section 2, an operating section 3, and a power source 4. As shown in FIG.

The headlamp 1 is held by a headlamp holding member 5, and a support piece 6 provided at the upper part of the holding member 5 is rotatably attached to the vehicle body. It is connected to the tip of the drive body 7 of the drive unit 2 . The drive unit 2 is fixed to the vehicle body near the headlight 1, and includes a drive body 7 that is movable relative to the vehicle body, and when the drive body 7 is displaced relative to the vehicle body, the drive unit 2 is fixed to the vehicle body. The connection point with the headlight 1 is displaced relative to the vehicle body, and the inclination of the headlight 1 relative to the vehicle body is therefore changed. The operating section 3 includes a multi-stage changeover switch 8 that determines the angle of inclination of the headlamp 1 with respect to the vehicle body.

FIG. 2 shows a control circuit of the irradiation angle adjusting device for a vehicle headlamp according to the present invention, and will be explained in more detail using this diagram. Reference numeral 9 denotes a DC motor included in the drive section 2, and the motor 9 causes the drive 7 to be displaced with respect to the vehicle body. Reference numeral 10 denotes a multi-stage switching control section, which has a shaft 11 rotationally driven by the drive section 2.
A rotating plate 12 and a large number of fixed contacts 13 fixed to
It consists of A, 13B..., 13E. The rotating plate 12 has a substantially disk shape, and is rotated clockwise and counterclockwise by rotation of the shaft 11. The fixed contacts 13A, 13B, ... 13E are attached to appropriate mounting members, and exist as a mutually fixed group in relation to the rotating plate 12, and the group of these contacts 13A, 13B, ... 13E and the rotating plate 1
2, the relative positional relationship is changed according to the displacement of the driving body 7. On the side of the rotary plate 12 that comes into contact with the contacts 13A, 13B, . ) is formed. The conductive portions 14 and 15 are approximately semicircular belt-shaped, which are formed by removing approximately 180 degrees different portions of the circular conductive region, and the removed portions serve as insulating portions 16 and 17. In addition, fixed contacts 13A, 13B,...
13E is arranged at an appropriate interval on the rotation locus of the conductive parts 14 and 15, and is arranged on the rotation locus within a center angle of approximately 180 degrees.
Although the manner in which the fixed contacts 13A, 13B, ... 13E are arranged is not necessarily defined or restricted to the above-mentioned range, at least the fixed contacts 1
3A, 13B, ... 13E is arranged such that when any one of the contacts is in contact with any one of the two insulating parts 16 or 17, all other contacts are in contact with the conductive part 14 or 15. It is said that

18 and 19 are connection terminals arranged on the rotation locus of the conductive parts 14 and 15, and the fixed contacts 13
A, 13B, .
9 is kept in contact with the other conductive part 15 at all times. The connection terminals 18 and 19 are connected to motor drive relays 20 and 21, respectively. The relay 20 is a forward rotation relay,
One connection terminal 18 is connected to one terminal of the excitation coil of the forward rotation relay 20, and the relay 21 is a reverse rotation relay, and the other connection terminal 1
9 is connected to one terminal of the excitation coil of the reversing relay 21. Note that the other terminal of the excitation coil of each relay 20 and 21 is grounded.

22 is a motor drive circuit including the motor 9 described above, and relays 20 and 21 are the motor drive circuit 2.
It is inserted in 2. 23 is a movable contact of the relay 20, which is connected to the common terminal CT ₁ connected to the normal rotation side input terminal 24 of the motor 9;
When the relay 20 is de-energized, it is in contact with the ground side terminal BT ₁ , but when the relay 20 is energized, it is in contact with the power supply side terminal MT ₁ . Also, 25 is relay 2
1 movable contact, connected to the common terminal CT ₂ connected to the reverse input terminal 26 of the motor 9, and when the relay 21 is de-energized, the ground terminal
Although it is in contact with BT ₂ , when the relay 21 is energized, it is in contact with the power supply side terminal MT ₂ . And the ground side terminals BT ₁ and BT ₂ are both grounded,
Also, power supply side terminals MT ₁ and MT ₂ are connected to power supply 4, respectively.
It is connected to the positive side terminal 27 of. When the relay 20 is energized, its movable contact 2
3 is in contact with the power supply side terminal MT ₁ , whereby the motor 9's forward rotation side input terminal 24 is connected to the positive side terminal 27 of the power supply 4, and the motor 9 is driven to rotate in the forward rotation direction, and vice versa. When the relay 21 is energized, its movable contact 25 is brought into contact with the power supply side terminal MT ₂ ,
As a result, the reverse input terminal 26 of the motor 9 is connected to the positive terminal 27 of the power supply 4, and the motor 9
is rotated in the reverse direction. And relay 2
When 0 and 21 are de-energized, both terminals 2 of the motor 9
4 and 26 are shorted.

8 is a multi-stage changeover switch included in the operation unit 3, and the changeover switch 8 is connected to the positive side terminal 27 of the power supply 4.
A movable contact 29 having a common terminal 28 connected to
and a large number of switching contacts 30A, 30B, . . . whose connection to the common terminal 28 can be switched by the movable contact 29.
30E. And the switching contact 30
A, 30B, ...30E are the fixed contacts 13 described above.
A, 13B, . . . 13E are each connected to those having the same additional code.

As mentioned above, the rotary plate 12 is rotated as the motor 9 of the drive unit 2 is driven to rotate, and in the illustrated embodiment, the rotating plate 12 is rotated in the direction in which the relay 20 is energized. When the motor 9 is rotated in the normal rotation direction, it is rotated counterclockwise, that is, in the direction of the solid line arrow in the figure,
Further, when the motor 9 is rotated in the reverse direction by energizing the relay 21, the motor 9 is rotated clockwise, that is, in the direction of the broken line arrow in the figure. When the motor 9 is rotated in the forward direction, the headlight 1 is tilted in the direction shown by the solid arrow in the figure, that is, in the upward direction, and when the motor 9 is rotated in the reverse direction, the headlight 1 is tilted in the direction shown by the solid line arrow in the figure, that is, in the upward direction. , the headlight 1 is tilted in the direction indicated by the dashed arrow in the figure, that is, in the downward direction.

Therefore, the switching contact 30A of the switching switch 8,
When a desired one is selected from 30B,...30E and the movable contact 29 is connected to it, the current from the power source 4 is transferred from the common terminal 28 to the movable contact 29.
Flows through the path from switching contact 30 to fixed contact 13, and further from one of the conductive parts 14 or 15 with which the fixed contact 13 connected to the switching contact 30 selected by the movable contact 29 is in contact. Relay 2 through either connection terminal 18 or 19
0 or 21. When either one of the relays 20 or 21 is energized, its coil is excited, thereby causing the movable contact 23 or 25 of the relay 20 or 21 to contact the power supply side terminal MT ₁ or MT ₂ , The motor 9 is rotated forward or reverse. When the motor 9 is rotationally driven, the driving body 7 is moved relative to the vehicle body, thereby tilting the headlamp 1 upward or downward, and rotating the rotating plate 12. . When the rotary plate 12 is rotated and its insulating part 16 or 17 is brought into contact with the selected fixed contact 13, that is, the fixed contact 13 is brought into contact with the conductive part 14 or 1.
When it leaves contact with 5, the energized relay 2
0 or 21 movable contact 23 or 25 is the ground terminal
BT ₁ is connected to BT ₂ , and terminals 24 and 25 of the motor 9 are short-circuited, so the motor 9 is braked to stop its rotation, the rotation of the rotating plate 12 is stopped, and the drive body is 7 is stopped. This causes the headlamp 1 to stop tilting.

3 to 5 show an example of a specific mechanism of the drive unit 2, and the mechanism shown in FIGS. 3 to 5 will be described below.

A DC motor 9 with a speed reducer 32 is mounted on the upper side of the casing 31 which is divided into two parts, and a feed screw 33 is rotatably supported on the lower side of the casing 31. It is connected to the output shaft 34 of the reducer 32, and
A movable element 35 is screwed onto the feed screw 33, and the movable element 35 is formed such that protrusions 36 and 37 protruding from both sides extend along the axial direction of the feed screw 33 on the inner wall of the casing 31. The feed screw 33 is slidably engaged with the grooves 38 and 39, thereby being held in the casing 31 so as to be slidable along the axial direction of the feed screw 33. Reference numeral 40 designates an operation lever for tilting the headlight, which is approximately L-shaped. The bent base of the casing 31 is pivotably attached to the opening of the casing 31 by means of a pin 43. In addition, the casing 31
A driver 7 is rotatably connected to the tip of the bent portion 44 of the lever 40 that protrudes outside, and a spherical portion 45 at the tip of the driver 7 is attached to the back surface of the lower portion 5a of the headlamp holding member 5. It is fitted into a provided spherical recess 46 . Reference numeral 47 denotes a gear fixed to the base of the feed screw 33, and the reduction unit 4 is made up of a plurality of gears (not shown).
The rotation of the output shaft 34 of the reducer 32 is transmitted to the gear 4.
The signal is transmitted to the deceleration unit 48 via 7 and 50. Reference numeral 11 denotes an output shaft of the speed reducer 48, which is used as a drive shaft for the rotary plate 12, and its tip end is as follows.
It passes through the bottom wall 51 of the deceleration part 48 of the casing 31 and a fixed contact mounting plate 52 provided below the bottom wall 51 with a slight interval, and the rotating part passes through the fixed contact mounting plate 52. A plate 12 is fixed. A large number of holes 5 are provided in the fixed contact mounting plate 52.
3, 53,... are formed, and these holes 53,
53,... have fixed contacts 13A, 13B,..., 13
E and the connecting terminals 18 and 19 are fitted with their respective tips protruding below the lower surface of the mounting plate 52, and each tip is in contact with the surface of the rotary plate 12 on the side facing the mounting plate 52. ing. And each fixed contact 13A, 13B,..., 13E and connection terminal 18,
19 is formed with flanges 54, 54, . . . One end of each flange 54, 54, . . . has a coil spring 55, 55, . The resilient force of the springs 55, 55, . . . causes each of the fixed contacts 13A, 13B, . . . , 13E to
The terminals 18 and 19 are always biased so as to maintain contact with the upper surface of the rotary plate 12.
Incidentally, connection terminals 56, 56, ... are provided protruding from the respective flanges 54, 54, ... of the fixed contacts 13A, 13B..., 13E and the connection terminals 18, 19, respectively, and the fixed contacts 13A, 13B,..., 13
The connection terminals 56, 56, ... of E are the changeover switches 8 of the operating section 3 provided near the driver's seat
are connected to switching contacts 30A, 30B,..., 30E, and connection terminal 5 of connection terminals 18, 19.
6 and 56 are connected to the coils of relays 20 and 21.

Therefore, in the drive section having the above configuration, when the motor 9 is rotated, the rotation is transmitted to the feed screw 33 via the reducer 32, and further, the rotation is transmitted to the feed screw 33 via the reducer 32.
3, the movable element 35 moves along the axial direction of the feed screw 33 and rotates the lever 40 about the pin 43. Further, this rotational force moves the driving body 7 in the front-back direction, thereby tilting the headlamp 1. When the feed screw 33 is rotated, the rotation is decelerated by the speed reducer 48 via the gears 47 and 50 and transmitted to the rotary plate drive shaft 11, thereby rotating the rotary plate 12. . Therefore, when the rotary plate 12 is rotated to a position where the fixed contact 13 connected to the switching contact 30 selected by the changeover switch 8 contacts the insulating part 16 or 17 of the rotary plate 12, the motor drive circuit 2
2 will be short-circuited, and the motor 9 will be stopped.

Next, the operation of adjusting the irradiation angle of the headlamp 1 by operating the operation switch 8 will be described in more detail using a specific example with reference to FIG.

First, from the state shown in FIG.
, the case where the switching contact 30C is selected and the movable contact 29 is connected to it will be explained. When the movable contact 29 of the changeover switch 8 and the changeover contact 30C are connected, the fixed contact 13C is connected to the power source 4 via the changeover switch 8. Since the fixed contact 13C is currently in contact with one of the conductive parts 14, the current from the power source 4 flows through the movable contact 29 of the changeover switch 8 → the changeover contact 30C → the fixed contact 13C → the conductive part 14 → the connection terminal 18 → the relay 20. Flow from coil to ground.
As a result, the relay 20 is energized and its movable contact 23 is connected to the power supply side terminal MT ₁ , so that the current from the power supply 4 is also transmitted to the motor drive circuit 22 from the movable contact 23 of the relay 20 to the motor 9 to the relay. 21, the movable contact 25→ground, and the motor 9 is rotated in the normal direction. When the motor 9 rotates forward, the drive body 7
is moved in the direction of arrow A in FIG. 3, and thereby the headlamp 1 is rotated in the direction shown by the solid line arrow in FIG. At the same time, the rotary plate 12 is rotated counterclockwise, the conductive part 14 first leaves contact with the fixed contact 13B, then leaves the contact with the fixed contact 13C, and the fixed contact 13C becomes an insulating part. 17, the conductive parts 14 and 1
5 (the state shown in FIG. 6A). Fixed contact 13C is insulating part 1
7, the movable contacts 23 and 25 of the relays 20 and 21 are both connected to the ground side terminals BT ₁ and BT ₂ , and the two terminals 24 and 26 of the motor 9 are short-circuited, so the motor 9 is The rotation is stopped, and the rotation of the rotary plate 12 and the movement of the driving body 7 are also stopped. Therefore, the direction of the headlight 1 is determined by the tilt angle at the time when the movement of the driver 7 is stopped.

Next, from the state shown in FIG. 6A, selector switch 8
A case will be described in which the switching contact 30B is selected and the movable contact 29 is connected to it. When the movable contact 29 of the changeover switch 8 and the changeover contact 30B are connected, the fixed contact 13B is connected to the power source 4 via the changeover switch 8. Since the fixed contact 13B is currently in contact with the other conductive part 15, the current from the power source 4 is transferred to the movable contact 2 of the changeover switch 8.
9 → switching contact 30B → fixed contact 13B → conductive part 1
5 → connection terminal 19 → coil of relay 21 → ground. As a result, the movable contact 25 of the relay 21
is connected to the power supply terminal MT ₂ , and the current from the power supply 4 is connected to the movable contact 25 for the motor drive circuit 22.
→ Motor 9 → Movable contact 23 → Grounding, and the motor 9 is rotated in the reverse direction. When the motor 9 is reversed, the driver 7 is moved in the opposite direction of arrow A in FIG. 3, thereby rotating the headlamp 1 in the direction indicated by the dashed arrow in FIG. being moved. At the same time, the rotary plate 12 is rotated clockwise, and the conductive part 15 is connected to the fixed contact 13.
B, the fixed contact 13B leaves contact with the insulating part 17
A state in which the conductive parts 14 and 15 are not in contact with each other (the state shown in FIG. 6B)
placed in When the fixed contact 13B comes into contact with the insulating part 17, the circuit through which current flows to the relay 21 is opened, so the movable contacts 23 and 25 of the relays 20 and 21 are both connected to the connection terminals BT ₁ and BT ₂ ,
The terminals 24 and 26 of the motor 9 are short-circuited, the rotation of the motor 9 is stopped, and the rotation of the rotating plate 12 and the movement of the driving body 7 are also stopped. Therefore, the direction of the headlamp 1 is determined by the tilt angle at the time when the movement of the driver 7 is stopped.

FIG. 7 shows another embodiment of the rotary plate, in which the stability of operation is further improved by directly connecting the conductive part and the motor drive relay. Rotating plate 12A shown in this embodiment
The same parts as in the rotary plate shown in the above-mentioned embodiment will be denoted by the same reference numerals as in the above-described embodiment, and a detailed explanation will be omitted.

14A and 15A are terminal conductive parts formed by partially extending each conductive area from the center of each conductive part 14 and 15 toward the periphery of the rotary plate 12, and the terminal conductive parts 14A and 15A have terminal conductive parts, respectively. Connection terminals 57 and 58 are provided.
One ends of coil springs 59 and 60 made of a conductive material are connected to the connection terminals 57 and 58, and the other ends of the coil springs 59 and 60 are connected to an appropriate inner wall of the casing 31 of the drive unit 2. and relay 2 respectively.
It is connected to the excitation coils 0 and 21. When the rotary plate 12A is rotated, one end of each coil spring 59, 60 is moved following the rotation of the rotary plate 12A, and the coil springs 59 and 60 are expanded. Then, when the rotation of the rotating plate 12A is stopped, the moving operation and the extending operation of one end of the coil springs 59 and 60 are stopped at that position. Therefore, the current flowing through each conductive part 14 and 15 flows from each terminal conductive part 14A and 15A to each connecting terminal 57 and 58.
The current flows through the coil springs 59 and 60 to the excitation coils of the relays 20 and 21.

According to the connection means between the rotary plate 12A, the conductive parts 14 and 15, and the relays 20 and 21, the rotary plate 12A is connected to the multi-stage switching control unit 13 selected by the inertia of rotation of the motor 9, etc. and insulation part 1
The coil springs 59 and 6 act to cause the coil springs to rotate further beyond the contact stop position with the coil springs 59 and 17.
0 tensile force can be applied to prevent the tilting of the headlamp 1 from overrunning, and the two conductive parts 14 and 15 are connected alternately to the selected fixed contact 13. It is also possible to prevent a hunting operation of the headlamp 1 due to contact with the headlamp 1, and it is possible to perform a stable irradiation angle adjustment operation.

Effects of the Invention As is clear from the above description, the irradiation angle adjustment device for a vehicle headlamp of the present invention comprises a headlamp held tiltably relative to the vehicle body, and a drive for tilting the headlamp. and an operation section for operating the drive section, and the drive section includes a motor, a drive body whose position is moved with respect to the vehicle body by the motor, and is connected to a part of the headlamp, and a multi-stage switching control section. The operating unit includes an operating switch having a movable contact and a plurality of switching contacts whose connections are switched by the movable contact, and the multi-stage switching control unit includes a plurality of fixed switches each connected to the plurality of switching contacts. The rotary plate is provided with a contact and a rotary plate that rotates in contact with the fixed contacts, and the rotary plate is rotated relatively according to the movement of the driving body, and a conductive circular plate is provided on the surface that contacts the plurality of fixed contacts. Abbreviation for area
Two approximately semicircular conductive parts are formed by removing parts that differ by 180 degrees, and a motor drive relay is connected to each conductive part, and the movable contact of each relay is connected to the motor drive circuit. It is inserted,
These contacts are short-circuited when both relays are de-energized, so that when either one of the relays is energized, the motor is caused to rotate forward, and when the other is energized, the motor is caused to rotate forward. The motor is connected to a power supply circuit so as to rotate the motor in reverse, and when the movable contact of the operation switch is connected to one of the fixed contacts, any conductive contact that comes into contact with the fixed contact is connected. The relay connected to the part is energized, thereby causing the motor to rotate forward or reverse, and when the fixed contact and the conductive part come out of contact due to the rotation of the rotary plate as the motor rotates, the motor rotates. It is characterized by being made to stop.

Therefore, according to the present invention, command control of the tilting operation of the headlamp and control of its operation amount can be performed by one multi-stage control member having a simple structure and consisting of only a small number of members. It is possible to simplify the control mechanism, and there are fewer failures.
Moreover, it is possible to provide an illumination angle adjustment device for a vehicle headlamp that can be constructed at a low cost.

In the above embodiment, the power source is a relay circuit,
Although a common motor circuit is provided, it is also possible to distinguish between the two and provide separate power supplies for the motor circuits.

[Brief explanation of drawings]

The drawings show an example of the implementation of the irradiation angle adjustment device for a vehicle headlamp according to the present invention. Fig. 1 shows the overall concept, Fig. 2 shows the overall circuit diagram, and Fig. 3 shows the driving section. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is an enlarged perspective view of the fixed contact group and the rotating plate, and FIGS. 6 A and B are views of the rotating plate. FIG. 7 is a plan view of the main part showing an example of the operation, and a perspective view of the main part showing another embodiment of the rotary plate. Explanation of symbols: 1... Headlight, 2... Drive section, 3... Operation section, 4... Power supply, 7... Drive body, 8... Operation switch, 9... Motor, 10... Multi-stage switching control section, 12...
Rotating plate, 13A to 13E...Fixed contact, 14, 15
...Conductive part, 20, 21...Motor drive relay, 2
2...Motor drive circuit, 29...Movable contact of operation switch, 30A to 30E...Switching contact of operation switch.

Claims (1)

[Claims] 1 Equipped with a headlamp held so as to be tiltable with respect to the vehicle body, a drive unit that tilts the headlight, and an operation unit that operates the drive unit, and the drive unit has a motor and a motor that allows the headlight to be tilted relative to the vehicle body. a driving body that is moved in position and connected to a part of the headlamp, and a multi-stage switching control unit;
The operation unit includes an operation switch having a movable contact and a plurality of switching contacts whose connections are switched by the movable contact, and the multi-stage switching control unit includes a plurality of fixed contacts each connected to the plurality of switching contacts. The rotary plate is provided with a rotating plate that rotates in contact with the fixed contacts, and the rotating plate is relatively rotated according to the movement of the driving body, and has a circular conductive area on a surface that contacts the plurality of fixed contacts. The parts that differ by approximately 180 degrees are removed to form two approximately semicircular conductive parts, each of which is connected to a motor drive relay, and the movable contacts of each relay are connected to the motor drive circuit. These contacts are short-circuited when both of the two relays are de-energized, so that when either one of the relays is energized, the motor rotates in the normal direction, and the other is energized. The motor is connected to a power supply circuit so as to reverse the motor when A relay connected to one of the conductive parts that comes in contact is energized, thereby causing the motor to rotate forward or reverse, and the contact between the fixed contact and the conductive part is separated by the rotation of the rotary plate as the motor rotates. An irradiation angle adjustment device for a vehicle headlamp, characterized in that the rotation of the motor is stopped at certain times.