JPH0229538B2 - - Google Patents

Abstract

PURPOSE:To simplify a control circuit and a control mechanism and to reduce the occurrence of troubles, by a method wherein control of an instruction on the inclining motion of a front light and the like and control of the amount of said motion are effected by a single multistage control member. CONSTITUTION:When either one of change-over contacts 26A-26E of change- over switches 8 and 9, which are operated in linkage with each other, is selected according to a desired lighting angle and is connected to a moving contact 25, the current of a power source 4 flows from the fixed contact 13 corresponding to a rotary disc 12 of a multistage change-over control part 11 through a conductive part 15 or 16 to a motor 10 and further to corresponding change-over contacts 30A-30E and a moving contact 29, and the motor 10 is run forwardly or reversely. When a front light 1 is consequently inclined, the rotary disc 12, simultaneously, is turned, and when insulating ends 17 and 18 make contact with selected fixed contacts 13 and 14, the motor 10 and the rotary disc 12 are brought to a stop. This enables to perform a control instruction on the inclining motion of a front light and the like, control of the amount of motion, and control of the rotating direction of the motor through a single multistage control member, and permits simplification of a mechanism.

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 ART In vehicles, especially automobiles, the body and axle are connected by a suspension system consisting of leaf springs, coil springs, etc., so if a large load is applied to the front or rear side of the vehicle body, the posture of the vehicle body may change. 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 objects, the present invention provides a tilting member that changes the direction of illumination of a headlamp by changing its mounting angle with respect to a vehicle body, a drive unit that tilts the tilting member, and a drive unit that tilts the tilting member. The drive section includes a drive shaft that is moved relative to the vehicle body by a motor and is connected to a part of the tilting member, and a multi-stage switching control section, and the operation section includes a multi-stage switching control section. It has a first changeover switch and a second changeover switch whose contact changeover operations are performed in conjunction, and the first changeover switch has a plurality of power supply side changeover switches whose connections are switched by a movable contact connected to the power supply. The second changeover switch has a plurality of ground side changeover contacts whose connections are switched by a movable contact connected to the ground circuit, and the multistage changeover control section is connected to each of the plurality of power supply side changeover contacts. A plurality of ground side fixed contacts connected to the plurality of power supply side fixed contacts and the plurality of ground side switching contacts, and a rotary plate that rotates in contact with the plurality of fixed contacts,
The rotary plate is relatively rotated in accordance with the movement of the drive shaft, and has two approximately semicircular conductive portions formed on the surface that contacts the plurality of fixed contacts, and has two conductive portions formed in the shape of semicircular bands. One of the two conductive parts is connected to the reverse side input terminal, and the other conductive part is connected to the reverse side input terminal, and the movable contact of the changeover switch in the operation part is connected to the above-mentioned When connected to one of a plurality of fixed contacts, the motor is energized through the conductive part that comes into contact with the fixed contact, thereby causing the motor to rotate forward or reverse, and as the motor rotates. The motor is characterized in that the rotation of the motor is stopped when the fixed contact and the conductive part are separated from each other due to rotation of the rotary plate.

By doing this, the irradiation angle of the headlight can be adjusted in multiple stages with only a small number of parts, and a new vehicular headlight irradiation angle that can perform stable adjustment operations is created. A regulating device can be provided.

Embodiments Hereinafter, details of the irradiation angle adjusting device for a vehicle headlamp according to the present invention will be described in accordance with 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, a support piece 6 provided at the upper part of the holding member 5 is rotatably attached to the vehicle body, and a lower part 5a of the holding member 5 is attached to the vehicle body. It is connected to the tip of the drive shaft of the drive unit 2. The drive unit 2 is fixed to the vehicle body near the headlight 1 and includes a drive shaft 7 that is movable relative to the vehicle body, and when the drive shaft 7 is displaced relative to the vehicle body, The connection point with the headlight 1 is displaced with respect to the vehicle body, and therefore the inclination angle of the headlight 2 with respect to the vehicle body is changed. The operating section 3 includes multi-stage changeover switches 8 and 9 that determine 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 10 denotes a DC motor included in the drive unit 2, and the drive shaft 7 is displaced with respect to the vehicle body by this motor 10.

Reference numeral 11 denotes a multi-stage switching control section included in the drive section 2, which includes a rotary plate 12 and a large number of fixed contacts 13A, 13.
B, ..., 13E and 14A, 14B, ..., 1
Consists of 4E. Although not shown, the rotary plate 12 has gear teeth formed on its outer circumferential surface, and rotates clockwise and counterclockwise by rotation of a gear for driving the rotary plate, which will be described later, which is meshed with the gear teeth. It is rotated in the circular direction. Fixed contacts 13A, 13
B,..., 13E and 14A, 14B,..., 14
E is attached to a suitable mounting member, and exists as two groups that are fixed to each other in relation to the rotary plate 12, and the fixed contacts 13A, 13 of one group
B, ..., 13E and the fixed contacts 14 of the other group
The relative positional relationship between A, 14B, . . . , 14E and the rotating plate 12 is changed as the drive shaft 7 is displaced.

Contact points 13A, 13B, ..., 13 of rotating plate 12
There are two conductive parts 15 and 16 on the side that is in contact with E and 14A, 14B, ..., 14E (the parts shown in the satin pattern in the drawing, and the same applies to other drawings). is formed. The conductive parts 15 and 16 are approximately semicircular belt-shaped, which are formed by deleting two places approximately 180 degrees apart from a circular conductive region, and the deleted parts are similar to the insulating part 1.
7 and 18.

Fixed contacts 13A, 13B,..., 13E and 1
4A, 14B, ..., 14E are conductive parts 15 and 1
The fixed contacts 13A, 13B, . . .
..., 13E are arranged so that the rotation locus of the conductive part is divided into two by a center angle of about 180 degrees, and the fixed contacts 14 of the other group
A, 14B, . Fixed contacts with additional symbols are arranged 180 degrees apart from each other about the center of rotation of the rotation locus of the conductive parts 15 and 16. Such fixed contacts 13A, 13B,
..., 13E and 14A, 14B, ..., 14E
Although the manner of arrangement is not necessarily defined or restricted to the above-mentioned range, when a certain fixed contact in at least one group comes into contact with one of the two insulating parts 17 or 18, The fixed contacts of the other group with the same additional code as the fixed contact are connected to the other insulating part 18 (or 1
7), and in this state, all other fixed contacts are in contact with the conductive part 17 or 18.

19 and 20 are connection terminals arranged on the rotation axes of the conductive parts 15 and 16, and the fixed contacts 13
A, 13B, ..., 13E group (or fixed contact 1
4A, 14B, . Contact with the portion 16 is maintained at all times. One of the connection terminals 19 is connected to the forward rotation side input terminal 21 of the motor 10, and the other connection terminal 20 is connected to the reverse rotation side input terminal 22 of the motor 10.

Reference numerals 8 and 9 indicate multi-stage changeover switches included in the operating section 3, and the contact switching operations of the switches 8 and 9 are performed in conjunction with each other. In this embodiment, the switch 8 is the operating switch, and the switch 9 is the driven switch, and by operating the switch 8, the contact of the switch 9 is also changed.

The switch 8 includes a movable contact 25 having a common terminal 24 connected to the positive terminal 23 of the power source 4, and a plurality of switching contacts 26A, 26B..., 2 whose connection to the common terminal 24 can be switched by the movable contact 25.
6E. And the switching contact 26A,
26B, . . . , 26E are fixed contacts 13A, 13B, . . . of one of the two fixed contact groups described above.
13E, each of which has the same additional code. The switch 9 also includes a movable contact 29 having a common terminal 28 connected to the ground circuit 27, and a plurality of switching contacts 30A, 30B, .
..., 30E. And switching contact 3
0A, 30B, . . . , 30E are connected to the fixed contacts 14A, 14B, .
Therefore, the fixed contacts 13A, 13B of one group,
..., 13E constitute a power supply side fixed contact group, and the other group of fixed contacts 14A, 14B, . . . , 14E constitute a ground side fixed contact group.

As described above, the rotary plate 12 is rotated as the motor 10 of the drive section 2 is rotationally driven. In the illustrated embodiment, when the motor 10 is rotated in the normal direction, it is rotated counterclockwise, that is, in the direction of the solid line arrow in the figure, and when the motor 10 is rotated in the reverse direction. When it is rotated, it is rotated clockwise, that is, in the direction of the dashed arrow in the figure.
When the motor 10 is rotated in the forward direction, the headlight 1 is tilted in the direction indicated by the solid arrow in the figure, that is, in the upward direction, and when the motor 10 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 26A of the switching switch 8,
26B, . The fixed contact 13 is further connected to the switching contact 26 selected by the movable contact 25.
Either one of the conductive parts 15 or 1 that is in contact with
6 to the motor 10 through either the connecting terminal 19 or 20, and further from the motor 10 to the connecting terminal 20 or 19 → the conductive part 16 or 15 → the fixed contact 14 connected to the selected switching contact 30 →
The flow follows the path of the selected switching contact 30 → movable contact 29 → ground circuit 27, and therefore the motor 10
is rotated forward or reverse.

When the motor 10 is driven to rotate, the drive shaft 7 is moved relative to the vehicle body, thereby tilting the headlight 1 upward or downward, and rotating the rotating plate 12. . Rotating plate 12
is rotated and its insulating parts 17 and 18 are brought into contact with the selected fixed contacts 13 and 14,
That is, when the fixed contacts 13 and 14 leave contact with the conductive parts 15 and 16, the power source 4 and the motor 10
Since the connection with the drive shaft 7 is cut off, the motor 9 is stopped from rotating, the rotation of the rotating plate 12 is stopped, and the movement of the drive shaft 7 is stopped. This causes the headlamp 1 to stop tilting.

3 to 5 show an example of a specific mechanism of the drive section 2, and this mechanism will be explained below. The mechanism shown in FIGS. 3 to 5 is a composite adjustment mechanism in which an aiming mechanism and a leveling mechanism are integrated.

31 is a casing, which is fixedly attached to the vehicle body. Reference numeral 32 denotes an insertion hole formed in the center of the front wall 33 of the casing 31, and the insertion hole 32 has a substantially regular octagonal shape (see FIG. 4). 34 is a rear insertion hole formed in the center of the rear wall 35 of the casing 31, and the front insertion hole 32 and the rear insertion hole 34 are coaxially provided. Reference numeral 36 denotes an annular support portion protruding from the inner surface of the central portion of the front wall 33 of the casing 31 toward the center of the casing, and 37 represents an annular support portion protruding from the upper wall 38 of the casing 31 toward the center of the casing. This is a central support wall, and a circular support hole 39 facing the support portion 36 is formed at the tip of the central support wall 37 in the center of the casing. still,
The centers of the central support wall 36 and the support hole 39 are arranged coaxially with the centers of the insertion holes 32 and 34.

40, the central part of the casing 31 is passed through the front insertion hole 32 and the rear insertion hole 34 in the front-back direction (in FIG. 3, the left side of the drawing is the front, the right side is the rear, and the front-back direction in the following explanation is (The relationship between the two follows this front-rear direction.) This adjustment screw is provided in a penetrating manner, and has a regular hexagonal head 4 at the rear end.
1 is formed, a sphere 42 is formed at the front end, and a screw groove 43 is formed at least in the middle part. The adjusting screw 40 has a spherical body 42 at its front end engaged with a spherical concave portion 44 formed in the lower portion 5a of the headlamp unit holding member 5 so as to open toward the rear thereof. It is connected to the lower end of the headlamp unit holding member 5 in the form of a ball joint.

Reference numeral 45 denotes a cylindrical moving body formed with a screw hole 46 passing through the center, and the outer peripheral surface of the moving body 45 has a substantially regular octagonal shape when viewed along the axial direction (see Fig. 4). ), and a large diameter portion 47 having a circular outer peripheral surface is integrally formed at the rear end portion, and a screw groove 48 is formed on the outer peripheral surface of the large diameter portion 47. The intermediate portion of the adjustment screw 40 is screwed into the screw hole 46 of the movable body 45. Further, a portion of the movable body 45 in front of the large diameter portion 47 is inserted into the front insertion hole 32 of the casing 31 described above. Since both the outer shape of the movable body 45 and the shape of the insertion hole 32 are regular octagons,
The movable body 45 is prevented from rotating and is allowed to move only in the axial direction when the movable body 45 moves toward the casing 31.
is maintained.

Reference numeral 49 denotes a driving body comprising a cylindrical portion 50 formed in a substantially cylindrical shape and a wheel gear portion 51 formed in a flange-like protrusion on the outer peripheral surface of the cylindrical portion 50. A support hole 52 that opens forward is formed in the cylindrical portion 50 , and a spur gear portion 53 is formed protruding from the center of the rear end surface, and furthermore, the rear end surface of the spur gear portion 53 and the rear end of the support hole 52 are connected to each other. An insertion hole 54 that communicates between
is formed. The front part of the cylindrical part 50 of the driving body 49 is rotatably fitted into the annular support part 36 of the casing 31, and the rear part of the cylindrical part 50 is formed in the central support wall 37 of the casing 31. The step portions 55, 55 formed at the base of the wheel gear portion 51 abut the rear end of the annular support portion 36 and the front surface of the central support wall 37, respectively. Therefore, the drive body 33 is rotatably supported by the casing 31. The movable body 45 has a screw groove 48 formed on the outer peripheral surface of the large diameter portion 47 thereof screwed into a screw groove formed on the inner peripheral surface of the support hole 52 formed in the cylindrical portion 50 of the drive body 49, As a result, the moving body 45 is held by the driving body 49.

56 is the motor 1 held within the casing 31
The worm gear 56 is connected to the output shaft 57 of the driver 49, and the worm gear 56 meshes with the gear teeth of the wheel gear portion 51 of the drive body 49. As the motor 10, a DC motor with a speed reduction mechanism 58 is used.

Note that the screw hole 46 of the movable body 45 and the adjustment screw 4
The screwing relationship with the screw groove 43 of 0 is the adjustment screw 4.
The adjusting screw 40 is in a screwed state such that it can move toward the headlamp unit 1 side when the adjusting screw 40 is rotated in the direction shown by the arrow 39 in the figure, and also moves with the support hole 52 of the drive body 49. The threaded relationship with the threaded groove 48 formed in the large diameter portion 47 of the body 45 allows the movable body 45 to move away from the headlamp unit 1 when the drive body 49 is rotated in the direction indicated by an arrow 60 in the figure. It has a screwed relationship that allows it to be moved to either side.

So-called aiming adjustment, in which the vertical illumination angle of the headlamp unit 1 is adjusted by manually operating the adjustment screw 40, is performed as follows. That is, when the adjusting screw 40 is rotated in the direction shown by the arrow 59, the adjusting screw 40 is screwed into the screw hole 46 of the movable body 45, and is moved toward the headlamp unit 1. Therefore, the headlamp unit 1 is rotated upward about the support point provided by the support pieces 6 and 7 as the rotation center. Further, if the adjusting screw 40 is rotated in the direction opposite to the arrow 59, the adjusting screw 40 will be screwed back into the screw hole 46 of the movable body 45, and will be moved in the direction away from the headlamp unit 1. Therefore, the headlight 1 is rotated in a downward direction.

Next, the operation of moving the moving body 45 and leveling the headlamp 1 is performed as follows. That is, when the motor 10 is rotated in the normal direction, the worm 56 is rotated in the direction shown by the arrow 61 in the figure, thereby causing the wheel gear portion 51 that meshes with the worm 56 to be rotated in the direction shown by the arrow 60 in the figure. As a result, the driver 49 is rotated in the direction shown by the arrow 60. Then, when the driving body 49 is rotated in the direction shown by the arrow 60, the movable body 45 is moved away from the headlamp unit 1 while holding the adjustment screw 40. This is because, as described above, the movable body 45 is prevented from rotating, so when the drive body 49 is rotated, it is screwed into the threaded groove on the inner peripheral surface of the support hole 52 of the drive body 49. This is because the large diameter portion 47 of the movable body 45 is sent away from the headlamp unit 1. in this way,
When the movable body 45 is moved away from the headlamp unit 1 while holding the adjustment screw 40, the headlamp unit 1 is rotated downward. Furthermore, when the motor 10 is reversed, the worm 56 is rotated in the direction opposite to the arrow 61, and thereby the driver 46 is rotated in the direction opposite to the arrow 60.
The moving body 45 is moved toward the headlamp unit 1 while holding the adjustment screw 40, and the headlamp unit is rotated upward.

Next, the control mechanism will be explained.

62 is a transmission gear. The transmission gear 62 is rotatably supported between the center support wall 37 and the rear wall 35 of the casing 31, and is integrally connected to a large diameter gear 63 that meshes with the spur gear portion 53 of the drive body 49. It consists of a small diameter gear 64 formed in.

Reference numeral 12 denotes a rotating plate made of an insulating material such as synthetic resin, and is formed into a substantially disk shape. An insertion hole 65 through which the adjustment screw 40 is inserted is formed in the center of the rotary plate 12, an annular recess 66 is formed in the front surface, and a semicircular belt-shaped groove 66 is formed in the rear surface. Two conductive parts 15 and 16 are formed. 67 is the center support wall 37 of the casing 31
The rotation plate 12 is rotatably supported with respect to the casing 31 by the support projection 67 being engaged with the annular recess 66. Ru. In addition, the rotating plate 12
Gear teeth 68 are formed on the outer peripheral surface of the transmission gear 62, and the gear teeth 68 mesh with the small diameter gear 64 of the transmission gear 62.

Reference numeral 69 denotes a contact plate made of an insulating material such as synthetic resin and formed into a rectangular plate shape, for example, and is connected to the casing 3 with a slight distance between it and the rotary plate 12.
It is attached to the rear wall 35 of 1. The contact plate 69 has a large number of through holes 70, 70, .
An insertion hole 71 into which the adjustment screw 40 is inserted is formed in the center.

72 is a printed wiring board integrally attached to the rear surface of the contact plate 69;
A contact plate 69 is provided on the surface facing the contact plate 69.
A large number of conductive terminals 73, 73, . . . are printed and formed at positions facing the respective through holes 70, 70, . A notch 74 is formed on one side edge of the substrate 72, and a cord insertion hole 75 is formed in the rear wall 35 of the casing 31 at a position corresponding to the notch 74. 7
6 is a code. Although illustration is omitted,
The printed circuit board 72 has conductive terminals 73, 7
A printed wiring film extending from 3, . . . to the edge of the notch 74 is formed. 74 is an insertion hole through which the adjustment screw 40 is inserted.

78, 78, . . . are spherical contacts made of conductive material, and each contact 78, 78, .
The through holes 70, 70, . . . formed in the through holes 70, 70, .
Coil springs 79, 79, . . . made of a conductive material are inserted in a compressed state between the conductive terminals 73, 73, .
Each contact point 78, 7 due to the elastic force of 9, 79, ...
8, ... are the conductive parts 15 and 16 of the rotating plate 12 or the insulating part 1 formed between the conductive parts 15 and 16
7 and 18, and the conductive parts 15 and 16 of the rotary plate 12 and the conductive terminals 73, 73, .
...is electrically connected.

Note that 80 is a waterproof cover.

Thus, when the drive body 49 is rotated, the transmission gear 62 having the large diameter gear 63 that meshes with the spur gear portion 53 formed integrally with the drive body 49 is rotated; transmission gear 6
The rotating plate 12 having gear teeth 68 that mesh with the second small diameter gear 64 is rotated. The rotational operation of the rotary plate 12 is caused by the spherical contacts 78, 78 (fixed contact 13 in the circuit of FIG.
and 14. ) is the insulating part 1 of the rotating plate 12
7 and 18 is reached. Then, when the selected contacts 78, 78 come into contact with the insulating parts 17, 18 of the rotating plate 12, the rotation of the motor 10 is stopped, and the rotation of the drive body 49 and the transmission gear 62 is stopped by stopping the motor 10. Then, the rotation of the rotating plate 12 is stopped.

Next, the operation of adjusting the illumination angle of the headlight 1 by operating the operation switch 8 will be explained in FIGS. 6A to 6D.
This will be explained in more detail by giving specific examples.

First, a case will be described in which the changeover contact 26C is selected in the changeover switch 8 and the movable contact 25 is connected to it from the state shown in FIG. 6A.

Movable contact 25 and changeover contact 26 of changeover switch 8
At the same time as C is connected, the movable contact 29 of the changeover switch 9 and the changeover contact 30C are connected, and the power supply side fixed contact 13C is connected to the power supply 4 via the changeover switch 8.
The ground side fixed contact 14C is grounded via the changeover switch 9. And the same figure A
In the state shown in , the power supply side fixed contact 13C is in contact with one conductive part 15, and the grounding side fixed contact 14C is in contact with the other conductive part 16, so that the current from the power supply 4 is transferred to the changeover switch 8. Fixed contact 25 → switching contact 26C → fixed contact 13C →
Conductive part 15 → connection terminal 19 → forward rotation side input terminal 21 of motor 10 → reverse rotation side input terminal 22 of motor 10
→Connection terminal 20→Conductive part 16→Fixed contact 14C→
Changeover contact 30C → Movable contact 29 of changeover switch 9
→ Grounding and flowing. Therefore, the motor 10 is rotated in the normal direction. When the motor 10 is rotated in the forward direction, the drive shaft 7 (adjustment screw 40 held by the movable body 45 in the above-mentioned adjustment mechanism) is moved from far away from the headlight to the side, thereby causing the headlight 1 to rotate. is rotated in the direction shown by the solid line arrow in FIG. At the same time, the rotating plate 12 is rotated counterclockwise, and the conductive part 15 first leaves contact with the fixed contact 13B, then leaves the contact with the fixed contact 13C,
The fixed contact 13C is in contact with the insulating part 17, and on the other hand,
The conductive part 16 first leaves contact with the fixed contact 14,
Then, it leaves contact with the fixed contact 14C, and the fixed contact 14C comes into contact with the insulating part 18. That is, the power supply side fixed contact 13C and the earth side fixed contact 1
4C is placed in a state in which it is not in contact with the conductive parts 15 and 16 (the state shown in FIG. 6B). In this state, the motor 10 is disconnected from the power source 4, so its rotation is stopped, and the rotation of the rotary plate 12 and the movement of the drive shaft 7 (adjustment screw 40) are also stopped. Therefore, the direction of the headlight 1 is determined by the tilt angle at the time when the movement of the drive shaft 7 (adjustment screw 40) is stopped.

Next, from the state shown in FIG. 6C, selector switch 8
A case will be described in which the switching contact 26B is selected and the movable contact 25 is connected to it. When the movable contact 25 of the changeover switch 8 and the changeover contact 26B are connected, the movable contact 29 of the changeover switch 9 and the changeover contact 30B are connected, and the power supply side fixed contact 13B is connected to the power supply 4 via the changeover switch 8. and also,
The ground side fixed contact 14B is grounded via the changeover switch 9. In the state shown in Figure C, the power supply side fixed contact 13B is in contact with the conductive part 16, and the earth side fixed contact 14B is in contact with another conductive part 15, so that the current from the power supply 4 is Movable contact 25 of changeover switch 8 → changeover contact 26
B → Fixed contact 13B → Conductive part 16 → Connection terminal 20
→Reverse rotation side input terminal 22 of motor 10 →Motor 10
→ Forward rotation side input terminal 21 of motor 10 → Connection terminal 1
9 → Conductive part 15 → Fixed contact 14B → Switching contact 30
The flow goes from B to the movable contact 29 of the changeover switch 9 to ground. The motor 10 is therefore reversed. Motor 1
0 is reversed, the drive shaft 7 (adjustment screw 4
0) is moved toward the headlamp 1, and thereby the headlamp 1 is rotated in the direction shown by the dashed arrow in FIG. At the same time, the rotary plate 12 is rotated clockwise, the conductive part 16 leaves contact with the fixed contacts 13D, 13C, and 13B in this order, and the fixed contact 13B comes into contact with the insulating part 17. , while the conductive part 15 has fixed contacts 14D, 14C,
14B is released in this order, and the fixed contact 14B comes into contact with the insulating part 18.
That is, both the power supply side fixed contact 13B and the ground side fixed contact 14B are placed in a state in which they are not in contact with the conductive parts 15 and 16 (the state shown in FIG. 6(D)). In this state, the motor 10 is disconnected from the power supply 4, so its rotation is stopped, and the rotation of the rotary plate 12 and the drive shaft 7 (adjustment screw 4) are stopped.
0) is also stopped. Therefore, the direction of the headlight is determined by the tilt angle at the time when the movement of the drive shaft 7 (adjustment screw 40) is stopped.

In the control circuit shown in FIG. 2, five fixed contacts 13 and 14 are provided to control the tilting of the headlamp unit 1 in five stages.
If a large number of through holes 70 are controlled in the contact plate 69 as shown in the figure, the number of control stages can be appropriately selected within the range of the number of through holes 70 by using any one of them as necessary. be able to be able to be able to be able to do so. For example, through hole 70 for fixed contact
If you prepare 20 pieces, to create the circuit shown in Figure 2, you would use only 10 of them and leave the remaining 10 pieces for free. Therefore, if 20 through-holes are prepared, it is possible to easily manufacture a device that controls the irradiation angle of the headlight in 10 steps or less depending on the vehicle to which it is applied.

FIG. 7 shows another embodiment of the connection between the headlight 1 and the drive shaft 7 (adjustment screw 40).
The aiming operation of the drive shaft 7 is made easier by connecting the drive shaft 7 (adjustment screw 40) and the headlight 1 via a crank-shaped connection mechanism. In this embodiment, the same members as those in the embodiment shown in FIGS. 3 to 5 described above are denoted by the same reference numerals as in the embodiment described above, and detailed explanation thereof will be omitted.

81 is a lever bent into a crank shape,
The bent portion of the lever 81 is rotatably supported by a pin 82 supported by the vehicle body or a member fixed to the vehicle body, and the tip of one arm 83 of the lever has a spherical recess opened on the top surface. 84 is formed. Then, the adjustment screw 40 is connected to the casing 3.
The adjustment screw 40 and the lever 81 are connected to each other by a spherical body 42 formed at the tip of the adjustment screw 1 , which vertically passes through the center of the adjustment screw 1 . Further, the base end of a rod 86 is rotatably connected to the tip of the other arm 85 of the lever 81 by a pin 87. A sphere 88 is formed at the tip of the rod 86,
The sphere 88 is the lower part 5a of the holding member 5 of the headlamp 1.
It is fitted into a spherical recess 44 formed in. When the adjustment screw 40 is moved downward, the lever 81 is rotated clockwise about the point supported by the pin 82, and the rotation of the lever 81 causes the rod to be rotated. 86 is moved in the direction shown by the solid arrow in the figure. As a result, the headlamp 1 is tilted upward. Also,
When the adjusting screw 40 is moved upward, the lever 81 is rotated counterclockwise, thereby moving the rod 86 in the tightening direction indicated by the dashed arrow, and the headlight 1 is tilted downward. be done.

In this way, the headlight 1 and the adjusting screw 40 are
According to the connection mode, the adjusting screw 40 can be arranged vertically or in any direction, so that the head 4 of the adjusting screw 40 can be arranged vertically or in any direction.
The head 41 of the screw 40 can be placed in a position where it is easy to perform aiming adjustment work by directly operating the headlight. It has the advantage that it can be installed even if there is not enough room.

Effects of the Invention As is clear from the above description, the irradiation angle adjustment device for a vehicle headlamp of the present invention has a tilting mechanism that changes the irradiation direction of the headlight by changing the mounting angle with respect to the vehicle body. the member, a drive unit that tilts the tilting member, and an operation unit that operates the drive unit, and the drive unit includes a drive shaft that is moved relative to the vehicle body by a motor and is connected to a part of the tilting member. The operation section includes a first changeover switch and a second changeover switch whose respective contact switching operations are performed in conjunction with each other, and the first changeover switch is a movable switch connected to a power source. The second changeover switch has a plurality of power supply side changeover contacts whose connections are switched by contacts, and the second changeover switch includes a plurality of ground side changeover contacts whose connections are changed by a movable contact connected to the ground circuit, and the multistage switching control The part rotates in contact with a plurality of power-side fixed contacts each connected to the plurality of power-side switching contacts, a plurality of ground-side fixed contacts each connected to the plurality of ground-side switching contacts, and these plurality of fixed contacts. and a rotary plate, the rotary plate is relatively rotated in accordance with the movement of the drive shaft, and has two approximately semicircular band-shaped conductive parts formed on a surface that contacts the plurality of fixed contacts. One of the two conductive parts is connected to the forward input terminal of the motor, and the other conductive part is connected to the reverse input terminal of the motor. When the movable contact of the changeover switch is connected to one of the plurality of fixed contacts, the motor is energized through the conductive part that comes into contact with the fixed contact, thereby causing the motor to rotate forward or reverse. The motor is characterized in that the rotation of the motor is stopped when the fixed contact and the conductive portion are separated from each other due to the rotation of the rotating plate accompanying the rotation of the motor.

Therefore, according to the present invention, command control of the tilting operation of a headlamp, etc. and control of its operation amount can be performed with one multistage control member, and moreover, the single multistage control member can also control the motor. Since the rotation direction can also be controlled, the control circuit and control mechanism can be made extremely simple.
It is possible to provide a vehicular headlamp illumination angle adjustment device that has fewer failures, can be constructed compactly and at low cost.

Incidentally, in the above embodiment, the tilting member for changing the irradiation direction of the headlight 1 is the headlight 1 itself, but in the present invention, the tilting member is not limited to the headlight itself; for example, The lamp body of the headlight is fixed to the vehicle body, the reflector is held so as to be tiltable relative to the lamp body, and the tip of the drive shaft (adjustment screw) is connected to a part of the reflector. , the reflecting mirror may be tilted.

[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 an exploded perspective view of the main part of the drive unit, FIG. 5 is a sectional view taken along the line A-A in FIG. 3, and FIGS. FIG. 7 is a schematic side view showing another embodiment of the connection between the tilting member and the drive shaft. Explanation of symbols 1...Tilt member, 2...Drive section, 3...
Operation unit, 4...Power source, 7...Drive shaft, 8...First changeover switch, 9...Second changeover switch, 10...Motor, 11...Multi-stage switching control unit, 12...Rotary plate, 13
A~13E...Power supply side fixed contact, 14A~14E...
Earth side fixed contact, 15... Conductive part, 16... Conductive part, 21... Motor forward rotation side input terminal, 22... Motor reverse rotation side input terminal, 25... Movable contact of first changeover switch, 26A to 26E... No. Switching contact of the first switching switch, 27... Earth circuit, 29... Movable contact of the second switching switch, 30A to 30E... Second
Changeover contact of changeover switch.

Claims (1)

[Claims] 1 Equipped with a tilting member that changes the irradiation direction of the headlight by changing the mounting angle with respect to the vehicle body, a drive unit that tilts the tilting member, and an operation unit that operates the drive unit, and the drive unit includes: The operation section includes a drive shaft that is moved relative to the vehicle body by a motor and connected to a part of the tilting member, and a multi-stage switching control section, and the operation section is a first switch that switches the respective contacts in conjunction with each other.
has a changeover switch and a second changeover switch,
The first changeover switch has a plurality of power supply side changeover contacts whose connections can be switched by a movable contact connected to the power supply, and the second changeover switch has a plurality of power supply side changeover contacts whose connections can be switched by a movable contact connected to the ground circuit. The multi-stage switching control unit includes a plurality of power-side fixed contacts each connected to the plurality of power-side switching contacts, and a plurality of ground-side fixed contacts each connected to the plurality of ground-side switching contacts. The rotary plate is provided with a contact and a rotary plate that rotates in contact with the plurality of fixed contacts, and the rotary plate is rotated relatively in accordance with the movement of the drive shaft and has approximately half a surface that contacts the plurality of fixed contacts. Two conductive parts are formed in the shape of a circular band, and one of the two conductive parts is connected to the forward rotation side input terminal of the motor, and the other conductive part is connected to the reverse rotation side input terminal. A conductive part is connected, and when the movable contact of the changeover switch in the operation part is connected to one of the plurality of fixed contacts, the motor is energized through the conductive part that comes into contact with the fixed contact. The motor is thereby rotated in the forward or reverse direction, and the rotation of the motor is stopped when the fixed contact and the conductive part are separated from each other due to the rotation of the rotating plate accompanying the rotation of the motor. An irradiation angle adjustment device for a vehicle headlamp, characterized in that: