JPH0156932B2 - - Google Patents

Abstract

PURPOSE:To permit both of the aiming adjustment for properly adjusting the illumination direction and leveling adjustment corresponding to the load variation by switching the connection between a shifting member for tilting an inclined member and a detection part for detecting said shift between connection and disconnection states. CONSTITUTION:When a solenoid 56 conducts, a plunger 57 is attracted, and the meshing of an intermediate gear 55 supported onto the plunger 57 with a pinion gear 54 is released. Further, when the conduction of the solenoid 56 is cut-off, the plunger 57 is sprung out by a spring built into the solenoid 56, and the intermediate gear 55 is meshed with the pinion gear 54. Therefore, when aiming adjustment is performed, a motor 48 is driven, keeping the solenoid 56 in conduction state. Further, when leveling adjustment is performed, the motor 48 is driven, keeping the solenoid 56 in nonconduction state. Thus, both of the aiming adjustment and leveling adjustment can be carried-out by driving a single driving part, and the structure of the optical-axis adjuster of a headlamp can be made simple.

Description

DETAILED DESCRIPTION OF THE INVENTION The optical axis adjustment device for a headlamp according to the present invention will be explained according to the following items.

A. Industrial application field B. Summary of the invention C. Prior art [Figure 11] D. Problem that the invention aims to solve E. Means to solve the problem F Example [Figures 1 to 8] a Automobile headlight [Figure 1].

b Tilt adjustment mechanism b-1 Housing [Figures 1 to 4, 7
Figures, Figure 8] b-2 Worm wheel [Figures 1 to 4]
Figure] b-3 Moving member [Figures 1 to 5, 7
Figures, Figures 8] b-4 Drive unit [Figures 1 to 4] c Detection unit [Figures 2 to 6] d Switching means [Figures 2 to 6] G Modification [Figure 9 FIG. 10 ] a Detection unit b Switching means H Effects of the invention (A. Field of industrial application) The present invention relates to a novel optical axis adjustment device for a headlamp. Specifically, aiming adjustment, which adjusts the irradiation direction when the vehicle is completed or at an appropriate time, and leveling adjustment, which adjusts the irradiation direction according to changes in load while driving, can be performed using a single adjustment mechanism. This is what I am trying to do.

(B Summary of the Invention) The optical axis adjustment device for a headlamp of the present invention can change the connection between a movable member that tilts a tilting member by moving the movable member and a detection unit that detects the movement of the movable member between a coupled state and an uncoupled state. By switching to the connected state, one driving section can be used for both aiming adjustment and leveling adjustment.

(C. Prior Art) [Fig. 11] In the case of a headlamp for a vehicle, for example, an automobile, it is necessary that the irradiation direction of the headlamp is adjusted correctly. For this purpose, a mechanism is provided for adjusting the irradiation direction, that is, aiming adjustment, when shipped from the factory or during regular or irregular inspections.

In addition, the body of a car is supported by the axle via a resilient suspension system, so if the load or the position on which the load is applied changes, the attitude of the car body changes, and the direction of the headlights that are supported by the car body changes. will change.

Therefore, it would be convenient to be able to adjust the irradiation direction to the vehicle body in accordance with changes in the load and the position where it is applied, that is, to be able to perform leveling adjustment.

FIG. 11 shows an example of a conventional optical axis adjustment device for a headlamp that is capable of performing two types of irradiation direction adjustments, such as aiming adjustment and leveling adjustment.

Reference numeral a denotes a lamp body made of synthetic resin, which has an opening at the front, and the front opening is covered with a lens b. A metal reflecting mirror c is supported in a space formed by the lamp body a and the lens b so as to be adjustable in angle. Although not shown, a light bulb is attached to this reflecting mirror c.

This FIG. 11 shows the lower part of the vehicle headlamp device, and in other parts as well, the reflector c and the lamp body a are connected by appropriate means.

Reference numeral d designates an operating shaft, and its tip end is positioned inside the lamp body a and its rear end is positioned outside the lamp body a through an insertion hole e formed in the rear wall of the lamp body a. f is a spherical body formed at the tip of the operating shaft d, and is fitted into a spherical recess h formed in a synthetic resin receiver g attached to the reflecting mirror c;
Thereby, the lower end of the reflecting mirror c and the tip of the operating shaft d are rotatably connected.

i is a worm wheel rotatably supported by lamp body a, and worm wheel i is meshed with worm l fixed to output shaft k of motor j, which is also fixedly supported by lamp body a. . A screw hole m is formed in the worm wheel i, passing through the worm wheel i in the axial direction.

n is an intermediate support, a screw hole o is formed passing through its axial center, the outer peripheral surface of the front half p is non-circular, and a screw groove q is formed in the rear half. . The screw groove q formed in the rear half of the intermediate support n is screwed into the screw hole m of the worm wheel i, and the non-circular portion p of the front half of the intermediate support n is formed in the lamp body a. It is slidably engaged with the non-circular hole r. Furthermore, a threaded groove s formed in the intermediate portion of the operating shaft d is screwed into a threaded hole o passing through the axial center of the intermediate support n.

t is an annular sealing member, the outer end of which is fixed to the lamp body a, and the inner end of which is in sliding contact with the operating shaft d.

In the headlamp optical axis adjustment device shown in FIG. 11, when the operating shaft d is rotated, depending on the direction of rotation, the operating shaft d is screwed into the intermediate support n, or It becomes twisted back,
The operating shaft d moves relative to the lamp body a in its axial direction. Therefore, the connection point between the tip of the operating shaft d and the reflecting mirror c moves back and forth, and the reflecting mirror c rotates about another connection point, not shown, with respect to the lamp body a. This allows aiming adjustment to be made.

Furthermore, when the motor j is rotated by remote control, the worm wheel i is rotated via the worm l. Then, the outer periphery of the front half p of the intermediate support n is non-circular, and is slidably engaged with the non-circular hole r formed in the lamp body a, and is prevented from rotating. Depending on the direction of rotation of the wheel i, the intermediate support n is moved forward or backward. Therefore, the operating shaft d supported by the intermediate support n is moved forward or backward together with the intermediate support n, and the reflecting mirror c is tilted. This results in leveling adjustment.

(D Problem to be Solved by the Invention) However, in the conventional headlamp optical axis adjustment device described above, the aiming adjustment mechanism and the leveling adjustment mechanism exist separately, and the The presence of the operating shaft d, which is a member that protrudes and moves in the axial direction, is not desirable in terms of waterproofing, and the relationship between the operating shaft d and the intermediate support n, in which they are moved, is not favorable. There are more parts in
The structure becomes complicated, and there are also problems in terms of durability.

Therefore, it is conceivable to perform the aiming adjustment by driving the motor j to move the intermediate support n.

However, since the leveling adjustment is performed by remote control from inside the vehicle, a detection section is provided to detect the angle of inclination of the headlight with respect to the vehicle body and to notify the operator of this. In many cases, such a detection section is adapted to detect the amount and direction of movement of the intermediate support n in the optical axis adjustment device of the headlamp.

Therefore, when aiming adjustment is performed by driving the motor j and moving the intermediate support n, a problem arises in that the reference position becomes out of alignment.
In other words, leveling adjustment assumes that the irradiation direction is correct under a certain reference condition (in most cases, only the driver is on board), and then determines how much and in which direction the irradiation direction should be adjusted depending on changes in load from the reference condition. This is done based on the judgment as to whether or not it is appropriate to make corrections. Therefore, even if the aiming adjustment is performed in the reference state, the detection section must be in a state in which it has detected that it is the reference state.

However, as described above, when aiming adjustment is performed by moving the intermediate support n, the detection unit is moved during the aiming adjustment, even though the state in which the aiming adjustment is completed should be the reference state. The detection unit does not detect the reference state; in other words, it detects that the adjustment has been made in either direction even though it is actually the reference state. This will prevent accurate leveling adjustment.

(E. Means for Solving Problems) Therefore, in order to solve the above-mentioned problems, the optical axis adjustment device for a headlamp of the present invention tilts the tilting member for changing the irradiation direction of the headlamp. It is possible to switch between a connected state and a non-connected state between the moving member to be moved and the detection unit that detects the movement of the moving member.

Therefore, when performing aiming adjustment, it is sufficient to move the movable member after disconnecting the movable member and the detection section, and thereby, aiming adjustment and leveling adjustment can be performed in one mechanism. This allows the structure to be simplified and durability to be improved.

(Embodiment F) [Figs. 1 to 8] Details of the optical axis adjustment device for a headlamp of the present invention will be described below with reference to the illustrated embodiment. In the illustrated embodiment, the present invention is applied to an optical axis adjustment device for an automobile headlamp.

1 in the figure is an optical axis adjustment device for an automobile headlamp to which the present invention is applied.

(a Automotive headlamp) [Fig. 1] Reference numeral 2 denotes a lamp body made of synthetic resin, and the front opening is opened, and the front opening is covered with a lens 3. And this lamp body 2 and lens 3
A reflecting mirror 5 is disposed within the space formed by the lamp chamber 4, that is, the lamp chamber 4.

The reflecting mirror 5 is tiltably supported relative to the lamp body 2. That is, although only the lower portions of the lamp body 2 and reflector 5 are shown in the drawings,
Two points on the upper part of the reflecting mirror 5 that are spaced apart from each other in the left and right direction are supported by the lamp body 2, and one of these two points is supported by a circuit formed in a ball joint shape, for example. It serves as a rotation fulcrum supported by the lamp body 2 via a dynamic connection means. Also, the other point of the above two points is
For example, the tip of an adjustment shaft screwed into the lamp body 2 is rotatably connected, and serves as an adjustment portion in which the distance between the adjustment shaft and the lamp body 2 is adjusted according to the rotational direction of the adjustment shaft. Therefore, as the adjusting shaft of the reflecting mirror 5 is rotated, the adjusting portion is moved in the front and back direction, so that the inclination of the reflecting mirror 5 is adjusted using the pivoting point as a pivoting point. .

Incidentally, such inclination adjustment of the reflecting mirror 5 is performed by an adjustment mechanism, which will be described later, which is another adjustment part provided in relation to a point of the reflecting mirror 5 that is spaced downward from the rotation fulcrum. It has become common practice to do so.

Although not shown, a light source is placed at the focal point of the reflecting mirror 5, and the lens 3 is formed with a predetermined lens element.

Reference numeral 6 denotes a bracket bent into a substantially crank shape when viewed from the side. The bracket 6 is provided on the reflecting mirror 5 so as to protrude rearward from its lower end, and has a rear end. A receiver 7 is attached. A spherical recess 7a opening toward the rear is formed in the receiver 7.

Reference numeral 8 denotes a housing connecting portion integrally formed so as to protrude rearward from the lower end of the rear surface of the lamp body 2, and this housing connecting portion 8
is for integrally connecting the lamp body 2 and a housing of an adjustment mechanism to be described later. The housing connecting portion 8 is formed into a substantially cylindrical shape that is short in the axial direction, and has a fitting hole 9 formed at its rear end and an annular groove located around the fitting hole 9 on its rear surface. 10 are formed.

(b Tilt Adjustment Mechanism) (b-1 Housing) [Figures 1 to 4, Figures 7 and 8] Reference numeral 11 denotes a housing that can be divided into two.

That is, 12 is the front housing half of the housing 11;
has a substantially rectangular shape that is long in the vertical direction when viewed from the rear, and has a certain depth;
The connecting portion 14 is integrally formed so as to protrude forward from the lower end of the front surface of the base portion 13, and the space thereof communicates with the space of the base portion 13. The connecting portion 14 is formed into a substantially cylindrical shape that is short in the axial direction with a circular opening 15 formed at the front end, and the cross-sectional shape of the insertion hole 16 is approximately as shown in FIG. It is said to be a regular hexagon. Engagement protrusions 17, 17, 17 are formed to protrude from the outer peripheral surface of the front end of the connecting portion 14 at positions separated by approximately 120 degrees. Reference numeral 18 denotes a ring-shaped support protrusion that protrudes rearward from a portion of the lower end of the front inner surface of the base 13 that is continuous with the connecting portion 14 so as to be coaxial with the connecting portion 14 .

Further, 19 is a housing half on the rear side of the housing 11, and the housing half 19 on the rear side
is the front housing half 1 seen from the rear.
It is approximately the same size as the base 13 of No. 2, and also has a certain depth.

Thus, the front housing half 12 and the rear housing half 19 formed in this manner are in a state in which the opening edge of the base 13 of the front housing half 12 and the opening edge of the rear housing half 19 are butted against each other. , screws 21, 21, . . . As a result, the housing 11 having a predetermined internal space 11a is formed, and the insertion hole 16 and the opening 15 of the connecting portion 14 of the front housing half 12 are formed.
The support ridges 18 formed on the base 13 of the front housing half 12 are all arranged coaxially.

The housing 11 is integrally connected to the lamp body 2 by connecting the connecting portion 14 of the housing half 12 on the front side with the housing connecting portion 8 of the lamp body 2 described above.
That is, the connecting portion 14 on the housing 11 side is almost completely fitted into the fitting hole 9 of the housing connecting portion 8 on the lamp body 2 side, and the engaging protrusion 17 formed on the connecting portion 14 on the housing 11 side, 17,1
7 is engaged with the opening edge of the fitting hole 9 of the housing connecting portion 8 on the lamp body 2 side from the inside of the lamp body 2. As a result, the housing 11 and the lamp body 2 are integrally connected, and the lamp chamber 4 of the lamp body 2 and the internal space 11a of the housing 11 are connected to each other. The engagement of the engagement protrusions 17, 17, 17 is performed through a notch (not shown) formed in the fitting hole 9 of the housing connection portion 8 of the lamp body 2.

The annular groove 10 formed on the rear end surface of the housing connecting portion 8 of the lamp body 2 has an O for sealing.
A ring 22 is disposed, and the O-ring 22 connects the groove 10 and the front surface of the housing 11, that is, the front housing half 12 when the lamp body 2 and the housing 11 are integrally connected as described above.
Therefore, the O-ring 22 is pressed from the front and back between the front surface of the base 13 of the lamp body 2 and the rear end surface of the housing connecting portion 8 of the lamp body 2 and the housing 1.
It is provided in close contact with the front surface of 1. As a result, the part where the lamp body 2 and the housing 11 are fitted together is surrounded by the O-ring 22 provided as described above, so that the fitting part can be made waterproof. become.

Reference numeral 23 denotes a rear support body disposed at a position a certain distance rearward from the support protrusion 18 at the lower end of the interior of the housing 11, and has a substantially cylindrical shape, with a front end projecting outward. Flange 2
4 are integrally formed. The rear support body 23 includes the housing halves 12 and 1 on both the front and rear sides.
9 are integrally connected, and the flange 2
A part of the outer periphery of the housing half 4 is held at a predetermined position within the housing 11 so as to be sandwiched between the joints of the housing halves 12 and 19 on both the front and rear sides. The flange 24 of the rear support body 23 is
As shown in FIGS. 3 and 4, it is formed into a substantially L-shape when viewed from the rear. The openings 25 and 26 at both the front and rear ends of the rear support body 24 have a substantially regular hexagonal shape when viewed from the front and rear directions, as shown in FIGS. 3 and 4. Note that portions of the inner circumferential surfaces of these openings 25 and 26, which form one side of the hexagon, are cutout portions 25a and 25a that are cut out toward the outside. Further, a notch 27 is formed in approximately one-third of the outer periphery of the rear support body 23 located on the left side, and a support piece 28 protrudes toward the left from the lower end of the outer periphery. It is integrally formed like this. Note that a circular large-diameter recess 29 is formed at a substantially L-shaped bent portion of the front surface of the flange 24 .

(b-2 Worm wheel) [Figures 1 to 4
Figure] 30 is a worm wheel. The worm wheel 30 is integrally formed with a substantially cylindrical base 31 and a substantially flange-shaped gear portion 32 formed near the rear end of the base 31. Gear teeth are formed on the The front half of the hole 33 in the base 31 is a screw hole 33a. However, worm wheel 30
The part of the base 31 that protrudes forward from the gear part 32 is rotatably fitted into the support protrusion 18 that is integrally formed from the front housing half 12, and the part of the base 31 that protrudes forward from the gear part 32 Part 3
The part protruding rearward from 2 is the rear support 23
The gear portion 32 is rotatably arranged in a recess 29 formed on the front surface of the flange 24.
The portion near the base 31 is positioned so as to be slidably sandwiched between the rear end surface of the support ridge 18 and the front surface of the flange 24 of the rear support member 23 from the front and back. is rotatably supported at a predetermined position.

(b-3 Moving member) [Figures 1 to 5, 7
FIG. 8] Reference numeral 34 denotes a moving member for tilting the reflecting mirror 5, which is composed of a connecting shaft moving body 35 and a connecting shaft 36 made of synthetic resin.

The connecting shaft moving body 35 has a helical shaft portion 37 at its intermediate portion in the axial direction, a front portion 38 having a substantially cylindrical shape, and a rear portion 39 having a substantially hexagonal column shape. A rotation preventing flange 40 having a substantially regular hexagonal outer circumferential shape in a portion between the part 38 and the part 38.
is formed. A connecting shaft insertion hole 41 is formed in the axial center of the connecting shaft moving body 35, and a rack 4 is formed in one of the six surfaces of the rear part 39.
2 is formed.

Accordingly, the connecting shaft moving body 35 has a part of the rack 42 formed at the rear part 39 of the connecting shaft moving body 35.
Notches 25 formed in the openings 25 and 26 of No. 3
a, 26a, the screw shaft portion 37 is screwed into the screw hole 33a of the worm wheel 30,
The front end of the front portion 38 is connected to the connecting portion 14 of the housing 11.
The rear portion 39 is inserted through the openings 25 and 26 of the rear support 23. The rotation prevention flange 40 of the connecting shaft moving body 35 is connected to the insertion hole 1 of the connecting portion 14 of the housing 11.
It is located at 6.

Therefore, the rotation prevention flange 40 of the connecting shaft moving body 35, which has a substantially hexagonal outer peripheral shape, is located in the insertion hole 16 of the housing 11, which has a substantially hexagonal cross-sectional shape, and has a substantially hexagonal columnar shape. The rear portion 39 is inserted into the openings 25 and 26 of the rear support 23 whose inner peripheral surface shape is approximately hexagonal, so that the rear portion 39 is prevented from rotating with respect to the housing 11. It is supported so that it can move freely in the axial direction.

The connecting shaft 36 is made of metal, has a substantially cylindrical shape as a whole, and has a sphere 43 integrally formed at its front end. Further, a flange 44 is integrally formed at the rear end of the connecting shaft 36, and
An annular groove 45 is formed in the middle part.

Thus, the portion of the connecting shaft 36 between the flange 44 and the annular groove 45 is inserted into the connecting shaft insertion hole 41 of the connecting shaft moving body 35, and the flange 44
is positioned so as to be in contact with the rear end surface of the connecting shaft moving body 35, and in this state, an annular groove 45 located along the front opening of the connecting shaft insertion hole 41 of the connecting shaft moving body 35 is provided with a stopper. E-ring 46 is engaged. Note that a wave-shaped washer 47 is disposed between the E-ring 46 and the front end surface of the connecting shaft 35.

A sphere 4 provided at the tip of the connecting shaft 36
3 is fitted into a spherical recess 7a provided in the receiver 7 supported by the reflecting mirror 5, whereby the reflecting mirror 5 and the connecting shaft 36 are connected like a ball joint.

(b-4 Drive unit) [Figures 1 to 4] Reference numeral 48 is a motor provided in a position closer to the right side of the space 11a of the housing 11, and its output shaft 49 is engaged with the worm wheel 30. A worm 50 is fixed.

Thus, when the motor 48 is rotated, the worm wheel 30 will be rotated. Since the worm wheel 30 itself cannot be moved in the front-back direction, the screw hole 33
The connecting shaft moving body 35 that is threadedly engaged with the worm wheel a is moved forward or backward depending on the rotational direction of the worm wheel 30.

When the connecting shaft moving body 35 is moved in the front-rear direction, the connecting shaft 36 is also moved in the front-rear direction integrally with it. Therefore, when the connecting shaft moving body 35 is moved in the front-back direction, the reflecting mirror 5
Since the lower end of the reflector 5 is moved in the front-back direction, the inclination of the reflecting mirror 5 is thereby adjusted.

(c Detection part) [Figures 2 to 6] Note that 51 is a potentiometer, and the potentiometer 51 is attached to the upper part of the rear surface of the flange 24 of the rear support 23 provided in the housing 11. The detection shaft 53 is fixed and protrudes downward from the main body 52. The tip of the detection shaft 53 is rotatably supported by a support piece 28 formed on the rear support 23. A pinion gear 54 is fixed to the detection shaft 52.
4 is meshed with an intermediate gear 55.

The intermediate gear 55 is located in the notch 27 formed in the rear support 23 and meshes with the rack 42 formed in the rear part 39 of the connecting shaft moving body 35. Therefore, when the connecting shaft moving body 35 is moved in the front-back direction, the rack 42 rotates the pinion gear 54 via the intermediate gear 55, so that the detection shaft 53 is rotated. As a result, in the potentiometer 51, the detection axis 5
3 is detected, and from the detected rotation amount, a decoder (not shown) detects the amount of movement of the connecting shaft moving body 35, that is, the amount of tilting of the reflecting mirror 5. For example, the amount of rotation of the motor 48 can be controlled by remote control from the driver's seat.

(d. Switching means) [Figures 2 to 6] 56 is a solenoid fixed to the flange 24 of the rear support 23 within the housing 11, and 57 is a plunger. The intermediate gear 55 is rotatably supported by the tip of the plunger 57.

When the solenoid 56 is energized, the plunger 57 is retracted, and the intermediate gear 55 supported by the plunger 57 becomes out of mesh with the pinion gear 54. When the solenoid 56 is de-energized, a A built-in spring (not shown) causes the plunger 57 to pop out, and the intermediate gear 55 comes to mesh with the pinion gear 54. In addition, since the intermediate gear 55 repeatedly engages with and disengages from the pinion gear 54 and the rack 42, its gear teeth 55a,
55a, a surface 55 whose end surface is inclined in three directions
b, 55b, . . . , the above-mentioned meshing operation can be performed smoothly. Also, Rack 42
Similar processing may also be applied to the tips of the gear teeth of the pinion gear 54.

Therefore, when performing aiming adjustment, the motor 48 is turned on while the solenoid 56 is energized.
Furthermore, when performing leveling adjustment, the motor 48 may be driven while the solenoid 56 is not energized.

(G Modification) [Figs. 9 and 10] Figs. 9 and 10 show a modification of the optical axis adjustment device for a headlamp according to the present invention.

The optical axis adjustment device for a headlamp according to this modification differs from that of the previous embodiment only in the detection section and the switching means,
Since the remaining parts are the same as those in the previous embodiment, only the different detection section and the embodiment will be described.

(a detection part) 58 is a pinion gear, and the rear support body 2
It is rotatably supported by support pieces 28, 28 formed on the connecting shaft moving body 5, and is engaged with a rack 42 formed on the connecting shaft moving body 5. Also, pinion gear 5
A clutch plate 59 is fixed to one end of the shaft 8.

60 is the clutch shaft, and potentiometer 5
It is slidably connected to the first detection shaft 53. That is, the clutch shaft 60 has a square hole 61 opened at one end.
is formed, and a detection shaft 53 formed in a prismatic shape is slidably inserted into the square hole 61. Therefore, when the clutch shaft 60 rotates, the detection shaft 53 is rotated integrally therewith. A clutch plate 62 is provided at the other end of the clutch shaft 60.
are fixed, and the pinion gear 54, clutch plate 59, detection shaft 53, clutch shaft 60, and clutch plate 62 are arranged coaxially.

Therefore, in a state where the clutch plates 59 and 62 are connected, when the connecting shaft moving body 35 moves and the pinion gear 58 is rotated by the latch 42, the clutch plates 59, 62 and the clutch shaft 60 are moved. Through this, the detection shaft 53 of the potentiometer 51 is rotated.

(b switching means) 63 is a plunger of the solenoid 56;
An arm 64 is provided at the tip of the arm 64, and the clutch shaft 60 is rotatably connected to the tip of the arm 64.

When the solenoid 56 is energized, the plunger 63 is retracted, the clutch plate 62 is separated from the clutch plate 59, and conversely, the solenoid 56
When the power to the clutch plate 59 is cut off, the plunger 63 is popped out by a spring built into the solenoid 56, and the clutch plate 62 is brought into contact with the clutch plate 59.

Therefore, even in this modification, when performing aiming adjustment, the motor 48 is driven with the solenoid 56 energized, and when leveling adjustment is performed, the motor 48 is driven with the solenoid 46 de-energized. All you have to do is drive 48.

(H Effect of the Invention) As is clear from the above description, the optical axis adjusting device for a headlamp of the present invention includes a tilting member for changing the irradiation direction of the headlamp, and an axis connected to the tilting member. a moving member that tilts the tilting member by being moved in a direction; a drive unit that moves the moving member by remote control; and a drive unit that is connected to the moving member to detect movement of the moving member. and a switching means for switching between a connected state and a non-connected state between the moving member and the detecting part.

Therefore, according to the present invention, both aiming adjustment and leveling adjustment can be performed by driving a single drive unit, and the structure of the headlamp optical axis adjustment device is simplified. At the same time, the durability of the device increases, and furthermore, it becomes easy to make it waterproof.

In the above embodiment, the movable member is composed of two parts, the connecting shaft moving body 35 and the connecting shaft 36, but it is not necessary to do it this way, and it may be constructed as an integral member. do not have.

Furthermore, in the above-described embodiments, the present invention is applied to a case where the reflecting mirror is a tilting member, but the tilting member is not limited to a reflecting mirror.
For example, the present invention can be applied to a lamp unit that is made up of a reflecting mirror, a light source, and a lens and is tilted as a whole.

[Brief explanation of drawings]

1 to 8 show an example of the implementation of the optical axis adjustment device for a headlamp according to the present invention, in which FIG. 1 is a longitudinal sectional side view, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. Fig. 3 is a sectional view taken along the - line in Fig. 1, Fig. 4 is a view showing the same part as Fig. 3 in a different state, Fig. 5 is an enlarged exploded perspective view of the main parts, and Fig. 6 is a gear FIG. 7 is a perspective view showing an enlarged main part of FIG. 1.
FIG. 8 is a sectional view taken along the line - in FIG. ,
Each shows a different state, and FIG. 11 is a longitudinal sectional view showing an example of a conventional optical axis adjustment device for a headlamp. Explanation of symbols, 1... Headlight optical axis adjustment device, 5
...Tilt member, 30, 48, 50...Drive section, 3
4... Moving member, 51... Detecting section, 55, 56,
57...Switching means, 56, 59, 60, 62, 6
3...Switching means.

Claims (1)

[Scope of Claims] 1. A tilting member for changing the irradiation direction of the headlight; a moving member connected to the tilting member and moved in the axial direction to tilt the tilting member; and by remote control. a drive unit that moves the movable member; a detection unit that detects movement of the movable member by being coupled with the movable member; and a state in which the movable member and the detection unit are connected and uncoupled. 1. An optical axis adjustment device for a headlamp, comprising a switching means for switching.