JPH0159131B2 - - Google Patents

Abstract

PURPOSE:To make aiming adjustment ever so easy, by installing a tilting member altering a headlight lighting direction, a moving member tilting the said member and a driving part shifting this moving member, while housing the driving part and the moving member both in a housing capable of positional adjustments. CONSTITUTION:At the time of aiming adjustment, a driving part 50 and a housing 12 with a built-in moving member 36 for tilting a reflector 5 being shifted by the driving part 50 both are rotated. In this housing, its cylindrical connecting part 15 is attached to a connecting part 9 projectingly installed in lower paired parts on a rear surface of a lamp body 2 by means of screwing so that when this housing 12 is turned round in a screwing direction, by way of example, this housing 12 comes to move frontward to the lamp body 2 in consequence, therefore the reflector 5 is tilted to an upward direction via a connecting shaft 38. Next, when leveling adjustment takes place, the driving part 50 is operated and a connecting shaft moving body 37 is made to move in both directions whereby a sense of the reflector 5 is adjusted.

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 field of application B. Summary of the invention C. Prior art [Fig. 8] D. Problem to be solved by the invention E. Means for solving the problem F. Example F-1 First example [1st example] Figures 1 to 5] a Automobile headlamp [Figure 1] b Irradiation direction adjustment mechanism b-1 Housing [Figures 1 to 5] b-2 Worm wheel [Figures 1 to 3
] b-3 Moving member [Figures 1 to 5] b-4 Drive unit [Figures 1 to 3] c Detection unit [Figures 2 and 3] d Adjustment of irradiation direction d-1 Aiming adjustment d-2 Leveling adjustment F-2 Second embodiment [Figures 6 and 7] G Effects of the invention (A Field of industrial application) The present invention relates to a novel optical axis adjustment device for a headlamp. . Specifically, the housing houses various elements for so-called leveling adjustment, which changes and adjusts the irradiation direction of the headlights according to changes in the load applied to the vehicle body, and houses the tilting member that can be tilted to change the irradiation direction. An object of the present invention is to provide a novel optical axis adjustment device for a headlamp whose structure is simplified by performing initial adjustment of the irradiation direction, so-called aiming adjustment, by adjusting the position relative to the case where the headlamp is positioned. It is.

(B. Summary of the Invention) The optical axis adjustment device for a headlamp of the present invention houses a moving member that tilts the tilting member of the headlamp by moving, and a drive unit for moving the moving member. A housing is coupled to a case housing the tilting member so as to be adjustable in position, and leveling adjustment is performed by driving the drive unit, and by adjusting the position of the housing with respect to the case. The structure is simplified by allowing aiming adjustment.

(C. Prior Art) [Fig. 8] In the case of a headlamp for a vehicle, for example, an automobile, it is necessary that its irradiation direction be 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. 8 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 able to adjust its angle. Although not shown, a light bulb is attached to this reflecting mirror c.

This FIG. 8 shows the lower part of the vehicle headlamp device, and in other parts as well, the reflecting mirror 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.

A worm wheel i is rotatably supported by the lamp body a, and is meshed with a worm l fixed to an output shaft k of a motor j which is also fixedly supported by the 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 through the axial center,
The first half p of the outer peripheral surface is non-circular, and the second half has a spiral groove q. 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.
Further, the screw hole o passing through the axial center of the intermediate support n has a screw groove s formed in the intermediate portion of the operating shaft d.
are screwed together.

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. 8, when the operating shaft d is rotated, the operating shaft d is screwed into the intermediate support n depending on the direction of rotation. 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, an aiming adjustment mechanism or a leveling adjustment mechanism exists separately, and in particular, the aiming adjustment mechanism or leveling adjustment mechanism exists separately. , and more parts are in a relationship where they are moved in the axial direction, such as the relationship between the operating shaft d, which is a member that moves in the axial direction, and the intermediate support n,
The structure becomes complicated, and there are also problems in terms of durability.

(E. Means for Solving Problems) Therefore, in order to solve the above-mentioned conventional problems, the optical axis adjustment device for a headlamp of the present invention changes the irradiation direction of the headlamp by tilting. A moving member for tilting the tilting member and a drive unit for moving the moving member are housed in one housing, and the housing is coupled to a case housing the tilting member so as to be adjustable in position. This is what I did.

Therefore, aiming adjustment can be performed by adjusting the position of the housing relative to the case, so the structure can be simplified.

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

(F-1 First Embodiment) [Figs. 1 to 5] Figs. 1 to 5 show a first embodiment of the optical axis adjustment device for a headlamp according to the present invention.

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 reflector 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 configured, for example, in the shape of a ball joint. It serves as a rotation fulcrum supported by the lamp body 2 via a rotation connection means. Further, the other point of the above two points is rotatably connected to the tip of an adjustment shaft screwed onto the lamp body 2, and the lamp body 2 This is an adjustment section that adjusts the distance between the two. Therefore, the reflecting mirror 5
As the adjustment shaft is rotated, the adjustment portion is moved in the front-rear direction, so that the inclination of the adjustment portion is adjusted using the rotation fulcrum portion as a rotation fulcrum.

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 8 opening toward the rear is formed in the receiver 7.

Reference numeral 9 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 9
is for integrally connecting the lamp body 2 and a housing of an adjustment mechanism to be described later. The housing connecting portion 9 is formed into a substantially cylindrical shape that is short in the axial direction, and a threaded groove 10 is formed on the inner circumferential surface thereof.

Reference numeral 11 denotes an annular receiving groove formed to surround the housing connecting portion 9 on the rear surface of the lamp body 2.

(b Irradiation direction adjustment mechanism) (b-1 Housing) [Figures 1 to 5] Reference numeral 12 denotes a housing that is formed to be split into two.

That is, 13 is a housing half on the front side of the housing 12;
has a substantially rectangular shape that is vertically long when viewed from the rear, and has a certain depth;
The connecting portion 15 is integrally formed so as to protrude forward from the lower end of the front surface of the base portion 14, and the space thereof communicates with the space of the base portion 14. The connecting portion 15 is formed into a substantially cylindrical shape that is short in the axial direction with a circular opening 16 formed at the front end, and the cross-sectional shape of the insertion hole 17 is approximately as shown in FIG. It is said to be a regular hexagon. Furthermore, a threaded groove 18 is formed on the outer circumferential surface of the connecting portion 15 . An annular receiving groove 19 is formed at a position surrounding the connecting portion 15 on the front surface of the base portion 14 . This receiving groove 19 corresponds to the receiving groove 11 formed on the rear surface of the lamp body 2.

Reference numeral 20 denotes an annular support ridge extending rearward from a portion of the lower end of the inner surface of the front wall of the base 14 that is continuous with the connecting portion 15 so as to be coaxial with the connecting portion 15 .

Further, 21 is a housing half on the rear side of the housing 12, and the housing half 21 on the rear side
is the front housing half 1 seen from the rear.
It is approximately the same size as the base 14 of No. 3, and also has a certain depth.

Further, a hand grip portion 22 is integrally formed on the rear surface of the rear housing half 21. The handhold part 2
2 is formed so as to be coaxial with the housing connecting portion 9, the housing connecting portion 15, and the supporting protrusion 20.

Thus, the front housing half 13 and the rear housing half 21 formed in this manner are in a state in which the opening edge of the base 14 of the front housing half 13 and the opening edge of the rear housing half 21 are butted against each other. , screws 23, 23, . . . By this,
A housing 12 having a predetermined internal space 12a is formed, and a front housing half 13 is formed.
The insertion hole 17 and opening 1 of the connecting portion 15 of
6. The support protrusion 20 formed on the base 14 of the front housing half 13 and the handhold portion 22 formed on the rear housing half 21 are arranged coaxially.

The housing 12 is integrally connected to the lamp body 2 by connecting the connecting portion 15 of the housing half 13 on the front side with the housing connecting portion 9 of the lamp body 2 described above. That is, the screw groove 18 of the connecting portion 15 on the housing 12 side is the same as the screw groove 1 of the housing connecting portion 9 on the lamp body 2 side.
0, and the coil spring 24 is compressed between the receiving groove 19 on the front surface of the housing 12 and the receiving groove 11 on the rear surface of the lamp body 2, so that the position can be adjusted. That is, when the connecting portion 15 of the housing 12 is screwed into the connecting portion 9 of the lamp body 2, the entire housing 12 moves forward, and conversely, the connecting portion 15 of the housing 12 is screwed into the connecting portion 9 of the lamp body 2. When untwisted, the entire housing 12 will be retracted.

Reference numeral 25 denotes a rear support body disposed at a position a certain distance rearward from the support protrusion 20 at the lower end of the interior of the housing 12, and has a substantially cylindrical shape, with a front end projecting outward. Flange 2
6 are integrally formed. The rear support body 25 includes the housing halves 13 and 2 on both the front and rear sides.
1 are integrally connected, and the flange 2
A part of the outer periphery of the housing half 6 is held at a predetermined position within the housing 12 by being held between the joints of the housing halves 13 and 21 on both the front and rear sides. The flange 26 of the rear support body 25 is
As shown in FIG. 3, it is formed into a substantially L-shape when viewed from the rear. As shown in FIG. 3, the openings 27 and 28 at both the front and rear ends of the rear support body 25 have a substantially regular hexagonal shape when viewed from the front and back direction. Note that a portion of the inner peripheral surface of these openings 27 and 28 that forms one side of the hexagon is a notch 27 that is notched outward.
a, 28a. In addition, the rear support body 25
A notch 29 is formed in approximately one-third of the outer periphery on the left side, and a support piece 30 is integrally formed so as to protrude leftward from the lower end of the outer periphery. ing. In addition, flange 2
A circular large-diameter recess 31 is formed at the substantially L-shaped bent portion of the front surface of the holder 6 .

(b-2 Worm wheel) [Figures 1 to 3
Figure] 32 is a worm wheel. The worm wheel 32 is integrally formed with a substantially cylindrical base 33 and a substantially flange-shaped gear portion 34 formed near the rear end of the base 33. Gear teeth are formed on the The front half of the hole 35 in the base 33 is a screw hole 35a.

Thus, in the worm wheel 32, a portion of the base portion 33 that protrudes forward from the gear portion 34 is rotatably fitted into the support ridge 20 that is integrally formed from the front housing half 13, and , a portion of the base portion 33 that protrudes rearward from the gear portion 34 is connected to the flange 2 of the rear support body 25.
6 is rotatably arranged in the recess 31 formed on the front surface, and the base 3 of the gear part 34
3 is positioned so that it is slidably sandwiched between the rear end surface of the support protrusion 20 and the front surface of the flange 26 of the rear support member 25, so that It is rotatably supported at the position.

(b-3 Moving member) [Figures 1 to 5] Reference numeral 36 is a moving member for tilting the reflecting mirror 5, which is made of a connecting shaft moving body 37 and a connecting shaft 38 made of synthetic resin. Become.

The connecting shaft moving body 37 has a helical shaft portion 39 at its intermediate portion in the axial direction, a front portion 40 having a substantially cylindrical shape, and a rear portion 41 having a substantially hexagonal column shape. A rotation preventing flange 42 having a substantially regular hexagonal outer circumferential shape in a portion between the part 40 and the part 40.
is formed. A connecting shaft insertion hole 43 is formed in the axial center of the connecting shaft moving body 37, and a rack 4 is formed in one of the six surfaces of the rear part 41.
4 is formed.

Therefore, the connecting shaft moving body 37 has a part of the rack 44 formed at the rear part 41 of the connecting shaft moving body 37.
Notches 27 formed in the openings 27 and 28 of 5
a, 28a, the screw shaft portion 39 is screwed into the screw hole 35a of the worm wheel 32,
The front end of the front portion 40 is connected to the connecting portion 15 of the housing 12.
The rear part 41 is inserted into the openings 27 and 28 of the rear support 25. The locking flange 42 of the connecting shaft moving body 37 is connected to the insertion hole 1 of the connecting portion 15 of the housing 12.
It is located within 7.

Therefore, the rotation prevention flange 42 of the connecting shaft moving body 37, whose outer circumferential shape is approximately hexagonal, is located in the insertion hole 17 of the housing 12, whose cross-sectional shape is approximately hexagonal, and A state in which rotation is prevented with respect to the housing 12 by inserting the columnar rear part 41 into the openings 27 and 28 of the rear support body 25 whose inner peripheral surface shape is approximately hexagonal. It is supported so that it can move freely in the axial direction.

The connecting shaft 38 is made of metal, has a substantially cylindrical shape as a whole, and has a sphere 45 integrally formed at its front end. Further, a flange 46 is integrally formed at the rear end of the connecting shaft 38, and
An annular groove 47 is formed in the middle part.

Thus, the portion of the connecting shaft 38 between the flange 46 and the annular groove 47 is inserted into the connecting shaft insertion hole 43 of the connecting shaft moving body 37, and the flange 46
is positioned so as to be in contact with the rear end surface of the connecting shaft moving body 37, and in this state, an annular groove 47 positioned along the openings on both sides of the connecting shaft insertion hole 43 of the connecting shaft moving body 37 is provided with a stopper. E-ring 48 is engaged. Note that a wave-shaped washer 49 is disposed between the E-ring 48 and the front end surface of the connecting shaft moving body 37.

A sphere 4 provided at the tip of the connecting shaft 38
5 is fitted into a spherical recess 8 provided in the receiver 7 supported by the reflecting mirror 5, whereby the reflecting mirror 5 and the reflecting shaft 38 are connected in a ball joint shape.

(b-4 Drive unit) [Figures 1 to 3] Reference numeral 50 denotes a motor provided in a position closer to the right side of the space 12a of the housing 12, and its output shaft 51 is engaged with the worm wheel 32. A worm 52 is fixed.

Thus, when the motor 50 is rotated, the worm wheel 32 is rotated. Since the worm wheel 32 itself cannot be moved in the front-back direction, the screw hole 35a of the worm wheel 32 cannot be moved in the front-back direction.
The connecting shaft moving body 37 that is threadedly engaged with the worm wheel 32 is moved forward or backward depending on the rotation direction of the worm wheel 32.

When the connecting shaft moving body 37 is moved in the front-rear direction, the connecting shaft 38 is also moved in the front-rear direction integrally with it. Therefore, when the connecting shaft moving body 37 is moved in the front-back direction, the lower end of the reflecting mirror 5 is moved in the front-back direction, so that the inclination of the reflecting mirror 5 is adjusted. become.

(C Detection Unit) [Figures 2 and 3] Reference numeral 53 is a potentiometer, and the potentiometer 53 is attached to the upper part of the rear surface of the flange 26 of the rear support 25 provided in the housing 12. The detection shafts 55 are fixed, and the tip portions of the detection shafts 55 projecting downward from the main body portions 54 are rotatably supported by the support pieces 30 formed on the rear support body 25. A pinion gear 56 is fixed to the detection shaft 55.
6 is a notch 29 formed in the rear support body 25;
and the rear part 4 of the connecting shaft moving body 37
1, and is engaged with the rack 44 formed at 1. Therefore, when the connecting shaft moving body 37 is moved in the front-back direction, the rack 44 rotates the pinion gear 56, so that the detection shaft 55 is rotated. As a result, the amount of rotation of the detection shaft 55 is detected by the potentiometer 53, and from the detected amount of rotation, a decoder (not shown) detects the amount of movement of the connecting shaft moving body 37, that is, the amount of tilting of the reflecting mirror 5. This allows the amount of rotation of the motor 50 to be controlled by remote control from the driver's seat, for example.

(d. Adjustment of irradiation direction) The irradiation direction of the headlamp optical axis adjustment device 1 is adjusted as follows.

(d-1 Aiming Adjustment) First, when performing aiming adjustment, the housing 12 is rotated with respect to the lamp body 2. Then, when the housing 12 is rotated in the screwing direction, the housing 12 moves forward with respect to the lamp body 2, and therefore the connecting shaft 38 supported by the housing 12 moves forward. , and the reflecting mirror 5 is tilted upward.

Further, when the housing 12 is rotated in the untwisting direction, the housing 12 is moved backward with respect to the lamp body 2, and the reflecting mirror 5 is therefore tilted downward.

Aiming adjustment is performed as described above.

(d-2 Leveling Adjustment) Next, when performing leveling adjustment, the motor 50 is rotated by remote control from the driver's cab.

Then, the connecting shaft moving body 37 moves forward or backward depending on the rotational direction of the motor 50. Therefore, when the connecting shaft moving body 37 moves forward, the reflecting mirror 5 is tilted upward, and the connecting shaft moving body 37 moves forward or backward. Mobile body 37
If the mirror 5 moves backward, the reflecting mirror 5 will be rotated in a downward direction.

In this way, leveling adjustment is performed.
The moving direction and tilting amount of the reflecting mirror 5 are detected by the potentiometer 53.

(E-2 First Embodiment) [Figs. 6 and 7] Figs. 6 and 7 show a second embodiment of the optical axis adjustment device for a headlamp according to the present invention. The second embodiment differs from the first embodiment only in the structure of the joint between the lamp body and the housing, and the other parts are the same as the first embodiment. Only the different parts will be explained, and the other parts will be given the same reference numerals as those given to the similar parts in the explanation of the first embodiment, and the explanation will be omitted.

An opening 57 is formed in the rear wall of the lamp body 2. The opening 57 is located at a position corresponding to the position of the receiver 7 supported by the reflecting mirror 5. Further, an annular receiving groove 58 is formed at a position surrounding the opening 57 on the inner surface of the rear wall of the lamp body 2 .

Reference numeral 59 denotes a semi-circular receiving part formed on the rear surface of the lamp body 2 so as to surround the opening 57, and is formed in the shape of a groove opening toward the opening 57, and both ends thereof are open. has been done.

60 is an adjustment nut made of synthetic resin, and a screw hole 61 is formed in the center. Further, a plurality of projecting pieces 62, 62, . . . are integrally formed to project radially from the peripheral edge of the adjustment nut 60.

A receiving plate 63 has a screw hole 64 formed in its center, and an annular receiving groove 65 formed on one surface so as to surround the screw hole 64.

Therefore, the adjustment nut 60 has its screw hole 61
is arranged on the rear surface of the lamp body 2 so as to overlap with an opening 57 formed in the lamp body 2. At this time, approximately half the circumference of the periphery of the adjusting nut 60 is received in the receiving portion 59.
The connecting shaft 15a of the housing 12, which is longer in the first embodiment, is screwed into the screw hole 61 of the adjusting nut 60, and a receiving plate 63 is attached to the tip of the connecting portion 15a protruding into the lamp body 2. is screwed on. In this case, the surface of the receiving plate 63 in which the receiving groove 65 is formed is connected to the receiving groove 58 formed in the lamp body 2.
The connecting portion 15a is coupled to the connecting portion 15a in a direction opposite to the connecting portion 15a. 6
A coil spring 5 is inserted between the inner surface of the rear wall of the lamp body 2 and the receiving plate 63 in a compressed state. Both ends of the coil spring 66 are fitted and held in the receiving grooves 58 and 65, respectively.
The force of the coil spring 66 to expand causes the adjustment nut 60 coupled to the connecting portion 15a to be attracted to the rear surface of the lamp body 2, thereby stably attaching the housing 12 to the lamp body 2. Supported.

However, in this second embodiment,
Aiming adjustment is performed by rotating the adjustment nut 60. That is, when the adjusting nut 60 is rotated, the adjusting nut 60 moves back and forth along the connecting portion 15a of the housing 12, and the adjusting nut 60 moves back and forth along the connecting portion 15a of the housing 12.
0 and the receiving plate 63 changes. and,
The adjustment nut 6 is adjusted by the force of the coil spring 66.
0 is attracted to the rear of lamp body 2,
Since the position of the coil spring 66 relative to the lamp body 2 does not change, the housing 12
moves back and forth with respect to the lamp body 2, thereby causing the reflecting mirror 5 to tilt.

Note that the leveling adjustment is performed by driving the motor 50, as in the first embodiment.

(G Effect of the invention) As is clear from the above description, the optical axis adjustment device of the headlamp of the present invention includes a tilting member that changes the irradiation direction of the headlamp by tilting, and a movable member that changes the irradiation direction of the headlamp by tilting. A moving member for tilting the tilting member and a drive unit for moving the movable member, the moving member and the drive unit are housed in one housing, and the housing is housed in the tilting member. It is characterized by being connected to the case so that its position can be adjusted.

Therefore, by moving the housing relative to the case, aiming adjustment can be performed and the structure can be simplified.

In addition, in the description of the above embodiment, the moving member is
Although it is composed of two parts, the connecting shaft moving body 37 and the connecting shaft 38, it can also be made into a single part.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the optical axis adjustment device for a headlamp according to the present invention, FIG. 1 is a vertical side view, and FIG. figure,
Figure 3 is a sectional view taken along the - line in Figure 1, Figure 4 is a sectional view taken along the - line in Figure 1, and Figure 5 is a sectional view taken along the - line in Figure 1.
6 and 7 are cross-sectional views taken along the - line in the figure, and show a second embodiment of the optical axis adjustment device for a headlamp according to the present invention. 7 is a sectional view taken along the line - in FIG. 6, and FIG. 8 is a longitudinal sectional side view showing an example of a conventional optical axis adjustment device for a headlamp. Explanation of symbols 1... Headlight optical axis adjustment device, 2...
Case, 5...Tilt member, 12...Housing, 3
2, 50, 52... Drive unit, 36, 37, 38... Moving member.

Claims (1)

[Claims] 1. A tilting member that changes the irradiation direction of the headlight by tilting, a moving member that tilts the tilting member by moving, and a drive unit that moves the moving member. The optical axis of a headlamp is characterized in that the moving member and the drive unit are housed in one housing, and the housing is coupled to a case housing the tilting member so that the position thereof can be adjusted. Adjustment device.