JPS61202945A - Optical axis adjusting device for headlight - 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 B1 Overview of the invention C1 Prior art [Figure 8] D8 Problems to be solved by the invention E8 Means for solving the problems F, Example F-1, First 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 [1st Figures to Figures 3] b-3, Moving member [First opening diagram 5] b-4, Drive unit [Figures 1 to 3] C8 detection unit [Figures 2 and 3] d, Irradiation Direction adjustment d-1, aiming adjustment d-2, leveling adjustment F-2, second embodiment [Figures 6 and 7] G1 Effects of the invention (A, industrial application field) The present invention is novel. The present invention relates to an 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 the tilting member that is tilted to change the irradiation direction. The present invention attempts 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 stored case. be.

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

(C, Prior Art) [Figure 8] In a headlamp for a vehicle, for example, an automobile, it is necessary that the direction of illumination 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 car's podium is supported by the axle via a resilient suspension system, so if the load or the position where 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 if the direction of irradiation to the vehicle body could be adjusted in accordance with changes in the load and the position where it is applied, that is, by 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. Reference numeral C denotes a metal reflector, which is supported in a space formed by the lamp body a and lens b so as to be able to adjust its angle.1 Although illustration is omitted, a light bulb is attached to this reflector C. There is.

This Fig. 8 shows the lower part of the vehicle headlamp device, and in other parts, the reflector C and the lamp body a are connected by appropriate means. The tip of the shaft is inserted into the lamp body through an insertion hole e formed in the rear wall of the lamp body 4a. f is a spherical body formed at the tip of the operating shaft d, which is fitted into a spherical recess formed in a synthetic resin receiver g attached to the reflecting mirror C; The lower end portion and the tip of the operating shaft d are rotatably connected.

A worm wheel i is rotatably supported by a lamp body a, and is meshed with a worm 1 fixed to an output shaft k of a motor j, which is also fixedly supported by the lamp body a. A shaft hole m is formed in the worm wheel i, passing through the worm wheel i in the axial direction. n is an intermediate support body, a shaft hole 0 is formed passing through its central axis, the front half p of its outer peripheral surface is non-circular, and the shaft groove q is formed in the rear half. . The shaft groove q formed in the rear half of the intermediate support n is screwed into the shaft hole m of the worm wheel i, and the non-circular part p of the front half of the intermediate support n is screwed into the lamp body a. It is slidably engaged with the formed non-circular hole r. Further, a screw (MS) formed at the intermediate portion of the operating shaft d is screwed into a shaft hole O passing through the central axis of the intermediate support n.

t is an annular sealing member, the outer end of which is connected to the lamp body a
The inner edge 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 is twisted back, and the operating shaft d moves in its axial direction relative to the lamp body a. Therefore, the connection point between the tip of the operating shaft d and the reflecting mirror C moves back and forth, and one reflecting mirror C rotates about another connection point, not shown, with respect to the lamp body a. This allows aiming adjustment to be made.

Further, when the motor j is rotated by remote control, the worm wheel i is rotated via the worm t.

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, this intermediate support n
The operating shaft d supported by the intermediate support member n is moved forward or backward, 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 in particular, the aiming adjustment mechanism and the leveling adjustment mechanism exist separately. As with the relationship between the operating shaft d, which is a member that protrudes and moves in the axial direction, and the intermediate support n, there are many parts that are in a relationship that moves in the axial direction, and the structure becomes complicated. There are also problems in terms of durability.

(E. Means for Solving the Problems) Therefore, in order to solve the above-mentioned conventional problems, the optical axis adjustment device of the 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 position of the housing is adjustable with respect to a case housing the tilting member. It is a combination.

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 of the present invention will be described below according to an illustrated embodiment. In the illustrated embodiment, the present invention is applied to an optical axis adjustment device for an automobile headlamp.

(F-1, First Embodiment) [Figures 1 to 5] Figures 1 to 5 show the first embodiment of the optical axis adjustment device for a headlamp of the present invention.
This is an example of the following.

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

(a. Automobile headlamp) [FIG. 1] Reference numeral 2 denotes a lamp body made of synthetic resin, which has an opening at the front, and the front opening is covered with a lens 3. A reflecting mirror 5 is disposed within the space formed by the lamp body 2 and the lens 3, that is, within the lamp chamber 4.

The reflecting mirror 5 is tiltably supported relative to the lamp body 2. That is, although only the lower parts of the lamp body 2 and the reflecting mirror 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 horizontal direction are the lamp body 2.
The lamp body 2 is supported by the lamp body 2, and one of these two points is, for example, a rotation fulcrum supported by the lamp body 2 via a rotation connection means configured in the shape of a ball joint. . Further, the other point of the above two points is, for example, connected to the tip of an adjustment shaft screwed into the lamp body 2 so as to be rotatable, and the lamp body 2 This is an adjustment section that adjusts the distance between the two.

Therefore, as the adjusting shaft of the reflecting mirror 5 is rotated, the adjusting part is moved in the front-back direction, so that the inclination of the reflecting mirror 5 is adjusted by using the turning fulcrum part as a turning fulcrum.
Ru.

Incidentally, such inclination adjustment of the reflecting mirror 5 can also be performed by an adjustment mechanism, which will be described later, which is another adjustment section provided in relation to a point of the reflecting mirror 5 that is spaced downward from the rotation fulcrum. It is supposed to be done.

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 this 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 connects the lamp body 2 and a housing of an adjustment mechanism to be described later. It is for integral connection. The housing connecting portion 9 is formed into a substantially cylindrical shape that is short in the axial direction, and an axial groove 10 is formed on the inner peripheral surface of the housing connecting portion 9.
is formed.

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 12 is 2
The housing is splittable.

That is, 13 is a housing half on the front side of the housing 12, and the front housing half 13 has a substantially rectangular shape that is long in the vertical direction when viewed from the rear, and has a base portion 14 having a certain depth, and the base portion. 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 connecting portion 15 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 and has a circular opening 16 at its front end.
The cross-sectional shape of the insertion hole 17 is as shown in FIG.
It is said to be approximately regular hexagonal. Further, an axial 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.

20 is a connecting portion 15 of the lower end of the inner surface of the front wall of the base 14;
This is an annular supporting protrusion that protrudes rearward from a portion continuous with the connecting portion 15 so as to be coaxial with the connecting portion 15.

Further, 21 is a rear housing half of the housing 12, and the rear housing half 21 has approximately the same size as the base 14 of the front housing half 13 when viewed from the rear. It has some depth.

Furthermore, a hand grip portion 2 is provided on the rear surface of the rear housing half 21.
2 are integrally formed. The handhold portion 22 is connected to the housing connecting portion 9. Housing connection part 15, support protrusion 20
It is formed so that it is coaxial with the

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. , screw 23.23. They are integrally connected by...

As a result, the housing 12 having a predetermined internal space 12a is formed, and the front bousing bar 21
The insertion hole 17 and opening 16 of the connecting portion 15 of No. 3, the support ridge 20 formed on the 8 part 14 of the front housing half 13, and the handhold portion 22 formed on the rear housing 12 side 221. They will be 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 sound groove 18 of the connecting part 15 on the housing 12 side is screwed into the sound groove 10 of the housing connecting part 9 on the lamp body 2 side, and the receiving groove 19 on the side surface of the housing 12 and the receiving groove 11 on the rear surface of the lamp body 2 are screwed together. The coil spring 24 is compressed between the two and connected in a position adjustable manner. 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;
When the connecting portion 15 of the lamp body 2 is unscrewed from the connecting portion 9 of the lamp body 2, the entire housing 12 is moved backward.

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. A flange 26 is integrally formed.

In the rear support body 25, the housing halves 13 and 21 on both the front and rear sides are integrally connected, and a part of the outer periphery of the flange 26 is sandwiched between the joints of the housing halves 13 and 21 on both the front and rear sides. It is thus held in place within the housing 12. and,
The flange 2.6 of the rear support 25 is.

As shown in FIG. 3, it is formed in an abbreviated 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 portions of the inner circumferential surfaces of these openings 27 and 28, which form one side of the hexagon, are cutout portions 27a and 28a that are cut out toward the outside. Further, a notch 29 is formed in approximately one-third of the outer periphery of the rear support body 25 located on the left side, and a support piece 30 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 31 is formed at a substantially L-shaped bent portion of the front surface of the flange 26 .

(b-2, Worm wheel) [Figures 1 to 3] 32 is a worm wheel. The worm wheel 3
2 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, and gear teeth are provided on the outer peripheral surface of the gear portion 34. is formed.

The front half of the hole 35 in the base 33 is a chain 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 rear support body 25.
is rotatably arranged in a recess 31 formed on the front surface of the flange 26, and the base 3 of the gear portion 34
3 is positioned so as to be 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 can be held at a predetermined position within the housing 12. It is rotatably supported.

(b-3, Moving member) [Figures 1 to 5] Reference numeral 36 is a moving member for tilting the reflecting mirror 5 described above. Consists of.

The intermediate portion of the connecting shaft moving body 37 in the axial direction is a helical shaft portion 39.
The front part 40 is formed in a substantially cylindrical shape, and the rear part 4
1 is formed into a substantially hexagonal column shape, and I! A detent flange 42 having a substantially regular hexagonal outer circumference is formed between the shaft portion 39 and the front portion 40 . A connecting shaft insertion hole 43 is formed in the axial center of the connecting shaft moving body 37, and a rack 44 is formed in one of the six surfaces of the rear part 41.
is formed.

In this way, a part of the rack 44 formed in the rear part 41 of the connecting shaft moving body 37 is connected to the opening 27 of the rear support body 25.
．． 28, the screw shaft portion 39 is inserted into the shaft hole 3 of the worm wheel 32.
5a, the front end of the front part 40 is inserted into the opening 16 of the connecting part 15 of the housing 12, and the rear part 41 is inserted into the opening 27, 28 of the rear support 25.

The locking flange 42 of the connecting shaft moving body 37 is located within the insertion hole 17 of the connecting portion 15 of the housing 12.

Therefore, the rotation stopper 7 flange 42 of the connecting shaft moving body 37, which has a substantially hexagonal outer peripheral shape, is located within the insertion hole 17 of the housing 12, which has a substantially hexagonal cross-sectional shape. The columnar rear part 41 is the rear support body 25
By being inserted into the openings 27 and 28 whose inner peripheral surface shape is approximately hexagonal, the housing 12 is supported so as to be movable in the axial direction while being prevented from rotating. There is.

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 intermediate portion.

Therefore, the connecting shaft 38 has a flange 46 and an annular groove 47.
is inserted into the connecting shaft insertion hole 43 of the connecting shaft moving body 37, and the 7 langes 46 are positioned so as to contact the rear end surface of the connecting shaft moving body 37, and in this state, the connecting shaft moving body An E-ring 48 for preventing removal is engaged with an annular groove 47 located along the front opening of the connecting shaft insertion hole 43 of No. 37. Note that a wave-shaped washer 49 is arranged between the E-ring 48 and the front end surface of the connecting shaft moving body 37.

Then, the sphere 45 provided at the tip of the two connecting shafts 38 is fitted into the spherical recess 8 provided in the receiver 7 supported by the reflecting mirror 5, whereby the reflecting mirror 5 and the connecting shaft 38 are connected to each other in a spherical manner. Connected like a joint.

(b-4, drive unit) [Figures 1 to 3] 50 is 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 connected to the worm wheel. A worm 52 meshed with 32 is fixed.

Thus, when the motor 50 is rotated, the worm wheel 32 is rotated. Since the worm wheel 32 itself cannot move in the front-back direction, the connecting shaft moving body 37 that is threaded into the shaft hole 35a of the worm wheel 32 moves forward or backward depending on the rotation direction of the worm wheel 32. I am forced to do it.

Then, when the connecting shaft moving body 37 is moved in the front-back direction,
The connecting shaft 38 is also moved integrally with it in the front-back direction. 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 first reflecting mirror 5 is adjusted. .

(c, Detection part) [Fig. 2, Fig. 3 1 Note that 53 is a potentiometer, and the potentiometer 53 is fixed to the upper part of the rear surface of the flange 26 of the rear support 25 provided in the housing 12. Ori,
A detection shaft 55 protruding downward from the main body 54 of this
The distal end portion is rotatably supported by a support piece 30 formed on the rear support member 25. A pinion gear 56 is fixed to the detection shaft 55.
6 is located in the notch 29 formed in the rear support body 25 and is engaged with the rack 44 formed in the rear part 41 of the connecting shaft moving body 37. Therefore, when the connecting shaft moving body 37 is moved in the front-rear direction, the rack 44 rotates the pinion gear 56, so that the detection shaft 55 is rotated. This allows potentiometer 5
3, the amount of rotation of the detection shaft 55 is detected, 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. Thereby, for example, the amount of rotation of the motor 50 can be controlled by remote control from the driver's seat.

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

(d-1, aiming adjustment) First, when adjusting aiming, /\Using 1
2 relative 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. The reflecting mirror 5 is tilted upward.

Further, when the housing 12 is twisted and rotated in the unscrewing 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 operator's cab.

Then, the connecting shaft moving body 37 moves forward or backward depending on the rotational direction of the motor 50, so when the connecting shaft moving body 37 moves forward, the reflecting mirror 5 is tilted upward.
Further, when the connecting shaft moving body 37 retreats, the reflecting mirror 5 is 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.

(F-2, Second Embodiment) [Figures 6 and 7] Figures 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 explained based on the first embodiment.

The explanation will be omitted by assigning the same reference numerals as those assigned to similar parts in .

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 reflection Mi5. 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 semicircular arc-shaped 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 shaft hole 61 is formed in the center. Further, from the peripheral edge of the adjustment nut 60, a plurality of protrusions 62, 62, Φ.
・Is formed in one piece.

Ru.

Reference numeral 63 denotes a receiving plate, in which a shaft hole 64 is formed in the center thereof, and an annular receiving groove 65 is formed in one surface so as to surround the shaft hole 64.

The adjusting nut 60 is disposed on the rear surface of the lamp body 2 so that its shaft hole 61 overlaps with the opening 57 formed in the lamp body 2. At this time, approximately half the circumference of the 7A straight nut 60 is received in the receiving portion 59.

The connecting portion 15a of the housing 12, which is formed longer in the first embodiment, is connected to the shaft hole 6 of the adjusting nut 60.
1 and protrudes into the lamp body 2.
A receiving plate 63 is screwed onto the tip of a. In this case, the receiving plate 63 is coupled to the connecting portion 15a with the surface on which the receiving groove 65 is formed facing the receiving groove 58 formed in the lamp body 2. 66 is a coil spring, which is attached to the lamp body 2.
is inserted in a compressed state between the inner surface of the rear wall and the receiving plate 63. 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 connected to the connecting portion 15a to tighten.
is attracted to the rear surface of the lamp body 2, whereby the housing 12 is stably supported by the lamp body 2.

Therefore, 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 distance between the adjusting nut 60 and the receiving plate 63 changes. The adjustment nut 60 is attracted to the rear surface of the lamp body 2 by the force of the coil spring 66.
Since the position of the coil spring 66 relative to the lamp body 2 does not change, the housing 12 ends up moving back and forth relative to the lamp body 2, which causes the reflecting mirror 5 to tilt.

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

(G. Effects of the Invention) As is clear from the above description, the optical axis adjustment device for a headlamp of the present invention includes a tilting member that changes the irradiation direction of the headlamp by tilting.

comprising a moving member that tilts the tilting member by moving, and a drive unit that moves the moving member,
The movable member and the drive unit are housed in one housing, and the housing is coupled to a case housing the tilting member 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 movable 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]

Figures 1 to 5 show the first part of the optical axis adjustment device for a headlamp according to the present invention.
Fig. 1 is a longitudinal side view, Fig. 2 is a sectional view taken along the line II-II in Fig. 1, and Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1. Figure 4 is IV-IV of Figure 1.
5 is a sectional view taken along the line ■-■ in FIG. 1, and FIGS. 6 and 7 show a second embodiment of the optical axis adjustment device for a headlamp according to the present invention. Fig. 6 is a longitudinal side view of the main parts, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, and Fig. 8 is a longitudinal side view showing an example of a conventional optical axis adjustment device for a headlamp. It is a diagram. Explanation of symbols 1... Headlight optical axis adjustment device, 2... Case, 5...9 tilting member, 12, ψ, housing, 32.50.52... Drive unit. 36.37.38...Moving member applicant Koito Manufacturing Co., Ltd. 4th rIR 5th rl! J

Claims (1)

[Scope of Claims] 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 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.