JP2503305B2 - Automotive headlamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a measuring device for confirming whether the irradiation direction of the headlamp in the left-right direction, that is, the irradiation angle of the left-right direction of the lamp is in a regular position. The present invention relates to a headlamp for a vehicle, and relates to a headlamp for a vehicle that can be easily adjusted so that the irradiation angle in the left-right direction of the headlamp is in the regular position when the headlamp is not in the regular position.

[Problems to be Solved by Prior Art and Invention]

An automobile headlamp will be described by taking a movable reflector type headlamp in which a reflector is tiltably supported in a lamp body as an example. As shown in FIG.
02 aiming screws with the back side of 02 extending back and forth
It is supported by three points 203, 204 and one rocking fulcrum 205. Note that FIG. 9 is a front view of the reflector, and the aiming screws 203 and 204 extend in the direction perpendicular to the paper surface. The aiming screws 203, 204 are rotatably supported on the back wall of the lamp body 201, and the aiming screws 203, 204 serve as a reflector 202.
The support points of are arranged, for example, at right angles to the swing fulcrum 205 when viewed from the front of the lamp. Then, by turning the aiming screws 203 and 204, the reflector 202 is moved horizontally.
The irradiation angle of the lamp is adjusted by tilting around Lx and the vertical axis Ly. Reference numeral 206 is a bulb that is a light source mounted on the reflector 202.

Also, in a unit movable type headlamp in which a lamp body / reflector unit having a reflector integrally formed on the inner peripheral surface of the lamp body is supported so as to be tiltable with respect to the lamp housing, although not shown, the reflector movable type shown in FIG. Similar to the headlamp, the lamp body / reflector unit is supported by the lamp housing by one swinging fulcrum and two aiming screws. By rotating the aiming screw, the lamp body / reflector unit is tilted to adjust the irradiation angle of the lamp.

As described above, in the automobile headlamp, the tilting member having the light reflecting surface that sets the irradiation direction of the lamp by rotating the two aiming screws (in the reflector movable headlamp, the reflector and the unit movable headlamp are used). Is the lamp body / reflector unit (hereinafter the same) with respect to the reference member (the lamp body for the reflector movable headlamps, the lamp housing for the unit movable headlamps, the same below) with respect to the vertical direction (around the horizontal axis) and the horizontal direction. The irradiation angle of the lamp is adjusted by tilting (around the vertical axis).

In recent years, various proposals have been made as means for easily measuring the irradiation angle of the lamp in the left-right direction.
-154630, Japanese Patent Application 63-98397, Japanese Application 63-121576
No. 1-43979, etc. are prior proposals already filed by the same applicant as the present application.

However, the series of proposals so far has a structure in which a measuring instrument for measuring the lateral inclination of the tilting member is mainly installed between the tilting member and the reference member, which is convenient for reading the scale of the measuring instrument. As such, there is a tendency to install the measuring device at the upper position of the lamp. Therefore, there is a problem that the vertical height of the lamp becomes large, which does not meet the recent demand for a lamp having a small vertical height. Particularly in a reflector-movable headlamp, there is a problem that it is inconvenient to read the scale because the measuring device is arranged inside the lamp body.

Further, as described in Japanese Patent Application No. 63-154630, a measuring device having a structure in which a graduation portion is projected to the rear of a reference member has been proposed. There is also a problem that it is necessary to make a hole, the processing is troublesome, and the adjustment when assembling the measuring device to the lamp is troublesome.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to assemble a measuring device for measuring the inclination of the irradiation angle of the headlamp to the rear protruding portion from the reference member of the aiming screw, thereby It is an object of the present invention to provide a headlamp for an automobile, which does not require any special processing for disposing a measuring device on a member and can achieve a reduction in vertical height.

[Means for solving the problem]

In order to achieve the above object, in the automobile headlamp according to claim (1), a tilting member having a light reflecting surface that sets the irradiation direction of the lamp is supported by a reference member. And a tilting member with respect to the reference member that is supported by three points, that is, a lateral aiming screw and a vertical aiming screw that penetrate the reference member in the front-rear direction and are supported by the reference member, and rotate the aiming screw. A tilting member that adjusts the irradiation angle of the headlamp by tilting in the vertical direction and the left-right direction.In a movable automobile headlamp, tilting is performed between the projection of the aiming screw to the rear of the reference member and the reference member. An inclination measuring device for measuring the inclination of the member is inserted, and the inclination measuring device is supported by the reference member and is used as an aiming screw. A guide member extending substantially parallel to the rearward protruding portion of the reference member, an aiming screw support nut screwed into the rearward protruding portion of the aiming screw, and both the aiming screw supporting nut and the guide member. A slide case that is slidably attached to the slide case, is rotatably supported by the slide case, is disposed in parallel with the aiming screw, and is screwed to a second female screw portion formed on the aiming screw support nut. A zero-point adjusting screw that fits the guide member and a slide case formed at a predetermined position between the guide member and the slide case, and a scale for indicating the relative displacement amount of the guide member and the slide case, and a stopper for preventing the slide case from falling off on the guide member. It is designed to be formed.

Further, in claim (2), the reflector movable headlamp, wherein the reference member is the lamp body, and the tilting member is a reflector that can tilt within the lamp body,
The means of claim (1) is applied.

Further, in claim (3), the unit movable headlamp in which the reference member is the lamp housing and the tilting member is a lamp body / reflector unit in which a reflector is integrally formed on the inner peripheral surface is provided. Is applied.

[Action]

When the aiming screw is rotated, the tilting member tilts with respect to the reference member (tilts about the tilting central axis), and the slide case slides in the front-rear direction along the guide member. The tilting amount of the tilting member with respect to the reference member due to the rotation of the aiming screw (the moving amount along the aiming screw at the point where the tilting member is supported by the aiming screw) is proportional to the moving amount of the slide case with respect to the guide member. The amount of tilt with respect to the reference member, that is, the amount of deviation of the irradiation angle of the headlamp, appears as a change in the scale between the slide case screwed to the aiming screw and the guide member supported and extended by the reference member. Therefore, it is possible to know from the change of the scale whether the irradiation angle of the headlamp is proper or not, and if not, the deviation amount. If there is a deviation, the irradiation angle may be adjusted by rotating the aiming screw so as to eliminate the deviation on the scale.

Further, the zero point position of the scale can be easily adjusted by sliding the slide case with respect to the guide member by rotating the zero point adjusting screw arranged in parallel with the aiming screw. Further, the stopper formed on the guide member prevents the slide case from falling off the guide member.

Further, the inclination measuring device has a structure in which it is interposed between the rearward protruding portion of the aiming screw from the reference member and the reference member, and there is no need to process the reference member to dispose the inclination measuring device. Further, since the inclination measuring device is arranged behind the reference member, the height of the headlamp in the vertical direction is reduced.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 7 show an embodiment in which the present invention is applied to a movable reflector headlamp in which a reference member is a lamp body and an inclined member is a reflector. FIG. 1 shows an irradiation angle adjusting device. FIG. 2 is a front view of the assembled movable reflector headlamp, FIG. 2 is a plan view of the same headlamp, and FIG. 3 is a longitudinal sectional view of the same headlamp (a sectional view taken along line III-III shown in FIG. 1). FIG. 4 is a vertical cross-sectional view (enlarged cross-sectional view taken along the line IV-IV shown in FIG. 1) around a position where an inclination measuring device for measuring the inclination of the irradiation angle of the headlamp in the left-right direction is provided. Is an exploded perspective view of the tilt measuring instrument, FIG. 6 is a rear view of the tilt measuring instrument, and FIG. 7 is a cross-sectional view of the tilt measuring instrument (cross-sectional view taken along line VII-VII shown in FIG. 4). .

In these drawings, reference numeral 2 is a container-shaped lamp body, a reflector 4 is assembled therein, and a front lens 6 is assembled in a rectangular front opening of the lamp body 2 to be integrated as a headlamp. There is.

As shown in FIGS. 1 to 3, the reflector 4 is supported by three points of a ball joint 10, a horizontal aiming screw 20, and a vertical aiming screw 30. The ball portion 12 side of the ball joint 10 is supported on the lamp body 2 side, and the reflector 4 can swing about the ball joint 10. Also aiming screw 20,30
Both are rotatably supported by the lamp body 2, and the male screw portions 20a, 30a on the front end side of the screw are screwed into the nuts 22, 32 on the reflector 4 side, respectively. Tamabe 1
The socket 14 that supports 2 is fixedly supported by a bracket 16 protruding from the back of the reflector, and the screw
Nuts 22 and 32 screwed onto 20a and 30a are fixedly supported by brackets 26 and 36 protruding from the back side of the reflector. Then, by rotating the aiming screws 20 and 30, the nuts 22 and 32 are moved back and forth along the aiming screws 20 and 30, whereby the inclination of the reflector 4 is changed.

That is, the supporting points of the reflector 4 by the left and right aiming screws 20 (the aiming screw 20 and the nut 22
Is the irradiation axis 1 of the headlamp (see FIG. 2).
Is located on the horizontal axis Lx that is orthogonal to the and which passes through the ball joint 10, and is the support point of the reflector 4 by the vertical aiming screw 30 (the screwing portion of the aiming screw 30 and the nut 32).
Is located on a vertical axis Ly that is orthogonal to the irradiation axis 1 of the headlamp and that passes through the ball joint 10. Therefore, the rotation of the aiming screw 20 causes the nut 22 to move back and forth along the screw 20, and the reflector 4 tilts about the vertical axis Ly.
It is possible to adjust the lateral inclination of the reflector 4 which is the tilting member with respect to the lamp body 2 which is the reference member, that is, the irradiation angle of the headlamp in the lateral direction. On the other hand, the rotation of the aiming screw 30 causes the nut 32 to move back and forth along the screw 30, and the reflector 4 tilts about the horizontal axis Lx orthogonal to the vertical axis Ly, which is a reference member of the tilting member reflector 4. The vertical inclination with respect to the body 2, that is, the vertical irradiation angle of the headlamp can be adjusted. Thus, the tilting adjustment of the reflector 4, that is, the irradiation angle of the headlamp can be adjusted by the two aiming screws 20 and 30.

Reference numeral 40 in FIG. 2 is a valve integrated with the valve socket 42 and is inserted into a valve insertion hole (not shown) formed in the rear top portion of the reflector 4. An opening for attaching and detaching the bulb socket is formed on the back side of the lamp body 2, and a rubber cover 46 is attached to the opening on the back side of the lamp body to close the opening. Reference numeral 48 is a locking cap 47 for pressing and fixing the valve socket 42 in the valve insertion hole of the reflector.

Further, in FIG. 1 to FIG. 3, reference numeral 3 is a seal groove formed in the peripheral edge of the front opening of the lamp body 2, and the seal agent 3a is loaded in the seal groove 3 to form the front lens 6
Legs are engaged. Reference numeral 7 is a clip for mechanically fastening the front lens 6 and the lamp body 2.

Reference numeral 50 is interposed between the lamp body 2 and the protrusion of the left-right direction aiming screw 20 toward the rear of the lamp body 2, and the left-right inclination of the reflector 4, that is, the left-right inclination of the irradiation angle of the headlamp. Is a first inclination measuring device, which is shown in detail in FIGS. 4 to 7.

The horizontal aiming screw 20 is used for the lamp body 2
Is disposed so as to penetrate in the front and rear, and the snap ring 23 mounted on the constricted portion 21 of the screw shaft portion and the flange portion 25 formed on the shaft portion cooperate with each other to increase the thickness of the lamp body thick portion 2b.
The lamp body 2 is positioned by sandwiching
Is supported by. Reference numeral 27 is an O-ring that is interposed between the rear surface of the lamp body 2 and the flange portion 25 to seal the screw bearing portion. A male screw portion 20b having a pitch (P ₂ ) larger than the pitch (P ₁ ) of the screw front end side male screw portion 20a is formed on the protruding portion of the aiming screw 20 toward the rear of the lamp body.
A U-shaped aiming screw support nut (hereinafter, referred to as a screw support nut) 52 is screwed to 0b. A rod-shaped guide member 54 extends rearward of the lamp body 2 in parallel with the left-right direction aiming screw 20, and a linear scale 55 extending in the extending direction is attached to the upper side surface of the guide member 54. . Reference numeral 55a indicates the zero point position of the scale 55. Reference numeral 54a is a bracket portion of the guide member 54, reference numeral 54b is a stopper portion formed on the upper surface of the projecting end of the guide member 54, and functions to abut the horizontal arm portion 57 of the slide case 56 and prevent the slide case 56 from falling off. There is. Reference numeral 54c is a mounting screw for mounting and fixing the guide member 54 to the lamp body 2.

A substantially gate-shaped slide case 56 is attached to both the screw support nut 52 and the guide member 54, and the slide case 56 includes the screw support nut 52 and the guide member 54.
It has a structure that can be slid forward and backward with respect to each. Reference numeral 57 denotes a frame-shaped horizontal arm portion that forms a part of the slide case 56 and engages with the guide member 54. The horizontal arm portion 57 has a guide hole that is an engaging portion with the guide member 54.
57a is formed. This horizontal arm portion 57 is formed with a rectangular opening 58 through which the scale forming surface of the guide member 54 can be exposed, and a reference point 59 corresponding to the scale 55 on the guide member side is displayed on the side edge of the opening. ing. The slide case 56 is formed, for example, by integral molding of synthetic resin.

The slide case 56 also has a screw support nut 52
A through hole 60 that opens in the engaging portion side with and extends in the front-rear direction is formed, and a zero adjustment screw 62 is disposed in this through hole 60. Further, a male screw part 61 is provided on the upper end surface 53 of the upper protrusion 53 of the screw support nut 52 assembled to the slide case 56.
Is formed, and the zero-point adjusting screw 62 is screwed into the male screw portion 61. That is, the zero adjustment screw
At the tip of 62, a central region 62a with threads is formed.
Constriction with smaller diameter and no threads
62b is formed, and a straight portion 62c aligned with the through hole 60, a large-diameter flange portion 64, and a jig engaging portion 65 are continuously formed on the rear end portion, and the straight portion 62c is rotated in the through hole 60 of the slide case 56. The structure is such that it can be supported as much as possible and is prevented from coming off from the slide case 56. On the tip side of the screw 62, the constricted portion 62b is dead or injured in the front end side small diameter portion 60a of the through hole 60, and the washer 63a attached to the constricted portion 62b,
The leaf spring-shaped push-on fix 63b prevents the retainer from coming off.

When the aiming screw 20 is rotated, the screw support nut 52 screwed with the male screw portion 20b of the screw tries to slide with respect to the slide case 56.
However, since the screw support nut 52 and the slide case 56 are axially fixed via the zero adjustment screw 62, the screw support nut 52 and the slide case 56 integrally slide along the guide member 54. That is,
The screw support nut 52 and the slide case 56 constitute a slide member 51 that slides by the rotation of the aiming screw 20, so that the movement amount of the reflector 4 appears as the movement amount of the scale 55 at the reference point position 59. By setting the zero point position of the scale 55 at the reference point position 59 in advance, the degree of inclination of the reflector 4 can be known from the scale 55. Also, the movement amount of the sirado case 56,
That is, the moving amount of the scale 55 is P ₂ / P ₁ times the moving amount of the reflector 4 because the pitch P ₂ of the male screw portion 20b of the aiming screw is larger than the pitch P ₁ of the male screw portion 20a. Therefore, the movement of the reflector 4 is enlarged and appears on the scale,
This has the advantage that the scale can be read easily and the measurement accuracy is high.

On the other hand, when the zero adjustment screw 62 is rotated, the screw support nut 52 screwed onto the screw 62 tries to slide along the zero adjustment screw 62. However, since the screw support nut 52 is also screwed into the aiming screw 20, it cannot slide, and conversely, the zero-point adjusting screw 62 slides with respect to the screw support nut 52. The zero adjusting screw 62 is a through hole of the slide case 56.
Since it is supported by 60, the slide case 56 and the zero adjustment screw 6 slide along the guide member 54, and the reference point position 59 can be moved along the scale 55.
Therefore, when the reflector 4 is at an appropriate position in the left-right direction, the zero point adjusting screw 62 is used to match the zero point position 55a of the scale 5 with the reference point position 59 (zero point adjustment).
To do.

Next, an example of a procedure for assembling the first inclination measuring device 50 to the aiming screw 20 will be described with reference to FIG.

First, the screw support nut 52 is slidably engaged with the slide case 56. Next, the zero adjustment screw 62 fitted with the washer 63a is pushed into the through hole 60 of the slide case while being screwed into the female thread portion 61 of the nut 52, and the screw 62
The tip of the is supported by pusher on fix 63b. Next, the guide member 54 is inserted from the tip side into the guide hole 57a of the horizontal arm portion 57, and the guide member 54 is assembled to the slide case 56. Next, set the U-shaped opening of the screw support nut 52 assembled to the slide case 56 to the aiming screw.
The male screw portion 20b of 20 is pushed into a predetermined position to be engaged.
Then, the guide member 54 is screwed to the lamp body 2 to complete the assembling of the inclination measuring device 50.

In FIGS. 1 to 3, reference numeral 50A denotes a reflector 4 which is interposed between a lamp body 2 and a protrusion of the aiming screw 30 in the vertical direction to the rear of the lamp body 2.
Is a second inclination measuring device for measuring the vertical inclination of the headlamp, that is, the inclination of the headlamp irradiation angle in the vertical direction. The structure is the same as that of the first inclination measuring device 50 described above, and the same reference numerals are used. The description is omitted by attaching.

Next, a procedure for adjusting the tilt measuring devices 50 and 50A when the headlamp is assembled to the vehicle body, and a procedure for adjusting the irradiation angle of the headlamp performed after that will be described.

As a single headlamp, when the zero point position 55a of the scale 55 coincides with the reference point position 59 in the first tilt measuring device 50 and the second tilt measuring device 50A, the headlamp's horizontal irradiation angle and vertical direction The irradiation angle is set to an appropriate position.

When the headlamp incorporating the first and second inclination measuring devices 50 and 50A is mounted on the vehicle body, the scale display of each inclination measuring device does not come to the proper position due to various errors. Therefore, it is necessary to adjust the scales of the first and second inclinometers to appropriate states.

 Next, an example of this scale adjustment method will be described.

First, the vehicle is placed in a horizontal place, the light distribution screen is set at a predetermined position in front of the vehicle, and the headlamp is turned on. Then, the aiming screws 20 and 30 are rotated to adjust the light distribution of the headlamp so that the light distribution of the headlamp comes to predetermined positions in the vertical and horizontal directions on the light distribution screen. However, at this time, the reference point position 59 and the scale zero point position 55a in each measuring device do not match due to variations in the lamp mounting surface on the vehicle body side and the like. Then, the zero-point adjusting screw 62 is rotated to slide the slide case 56 along the guide member 54 so that the scale zero point position 55a coincides with the reference point position 59. In this way, the scale of the reference point position 59 of the first tilt measuring device 50 and the second tilt measuring device 50A is adjusted so that the zero point 55a is displayed when the irradiation angle of the headlamp in the vertical and horizontal directions is at an appropriate position. To be done.

After that, the user adjusts the irradiation angle of the headlamp. That is, the reference point position 59 is the zero point position 55 of the scale.
When it is deviated from “a”, the amount of inclination of the reflector 4 in the left-right direction or the up-down direction, that is, the deviation of the irradiation angle of the headlamp in the left-right direction or the up-down direction can be read from these deviation amounts. In such a case, the aiming screws 20 and 30 are respectively rotated to adjust the scale zero point position 55a to the reference point position 59. In this way, the irradiation angle of the headlamp in the left-right direction or the up-down direction can be easily adjusted.

FIG. 8 shows that the reference member is a lamp housing, and the tilting member is a lamp body / reflector unit (a structure in which a reflector is integrally formed on the inner peripheral surface of the lamp body, which is hereinafter referred to as a lamp body unit). 1 shows an example in which the present invention is applied to a headlamp of a mold.

A first inclination measuring device 50 for measuring the horizontal inclination of the irradiation angle of the headlamp is interposed between the external housing 120b of the horizontal aiming screw 120 protruding rearward of the lamp housing 102 and the lamp housing 102. ing. Further, the male screw portion of the vertical aiming screw 130 protruding rearward of the lamp housing 102 and the lamp housing 102
A second inclination measuring device 50A for measuring the vertical inclination of the irradiation angle of the headlamp is interposed between the first and second heads. The structures of the first tilt measuring device 50 and the second tilt measuring device 50A are the same as the tilt measuring device shown in the above-described reflector movable headlamp, and the description thereof will be omitted by giving the same reference numerals. Omit it. In FIG. 8, reference numeral 140 is a bulb socket, and reference numeral 147 is a locking cap for fixing the bulb 140 in the bulb insertion hole of the lamp body unit.

〔The invention's effect〕

As is apparent from the above description, in the vehicle headlamp according to the present invention, the reference member of the tilting member (the reflector in the reflector movable type headlamp, the unit movable type headlamp is the lamp body / reflector unit; the same applies hereinafter). The tilt with respect to the lamp body for the reflector movable headlamp and the lamp housing for the unit movable headlamp (the same applies below) appears as a change in the scale of the tilt measuring device interposed between the aiming screw and the reference member. It is possible to read the tilt amount of the tilt member, that is, the tilt amount of the irradiation angle of the headlamp from the change of

Then, in order to adjust the irradiation angle of the deviated headlamp, the aiming screw may be rotated to tilt the tilting member so that the scale of the tilt measuring device is at a predetermined position, and the zero point adjustment may be performed. Since the zero point of the scale can be adjusted by rotating the screw, anyone can easily adjust the irradiation angle of the headlamp. Further, since the slide case is prevented from falling off by the stopper on the side of the guide member, there is no problem that the slide case is accidentally pulled out when the aiming screw is rotated.

Further, the tilt measuring device has a structure in which it is interposed between the rearward projecting portion of the aiming screw from the reference member and the reference member, and a hole for disposing the tilt measuring device is formed in the reference member as in the conventional case. No processing is required.

Also, since the inclination measuring device is arranged behind the reference member, it is easy to read the scale, the height of the headlamp is low in the vertical direction, and the lamp can be made thin. It also has the advantage of being small.

[Brief description of drawings]

FIG. 1 is an embodiment in which the present invention is applied to a movable reflector headlamp, and is a front view of the same headlamp, FIG. 2 is a plan view of the same headlamp, and FIG. 3 is a longitudinal sectional view of the same headlamp. FIG. 4 is a vertical cross-sectional view of the vicinity of the installation position of an inclination measuring device for measuring the inclination of the headlamp's left-right irradiation angle (first
FIG. 5 is an exploded perspective view of the tilt measuring instrument, FIG. 6 is a rear view of the tilt measuring instrument, and FIG.
FIG. 7 is a cross-sectional view of the tilt measuring instrument (line VII shown in FIG. 4).
8 is a cross-sectional view taken along line VII), FIG. 8 is an embodiment in which the present invention is applied to a unit movable type headlamp, and is a plan view of the headlamp shown partially broken away. FIG. 9 is a diagram showing a reflector movable type headlamp. It is explanatory drawing explaining a reflector support structure. 2 ... Lamp body that is a reference member, 4 ... Reflector that is a tilting member, 6 ... Front lens, 12 ... Ball joint as a swinging fulcrum of the reflector that is a tilting member, 20,120
...... Aiming screw for tilting the reflector, which is a tilting member, in the horizontal direction, 30,130 …… Aiming screw for tilting the reflector, which is a tilting member, in the vertical direction, 50 …… The horizontal illumination angle of the headlamp Tilt measuring device for measuring the tilt of the headlamp, 50A: second tilt measuring device for measuring the tilt of the vertical irradiation angle of the headlamp, 52: aiming screw support nut,
54 …… Guide member, 54b …… Slide case fall prevention stopper, 55 …… Scale, 55a …… Scale zero position, 56 ……
Slide case, 59 …… reference point position, 61 …… second internal thread, 62 …… zero adjustment screw, l …… headlamp irradiation axis, Lx …… horizontal axis, Ly …… vertical axis.

Claims (3)

(57) [Claims] 1. A tilting member having a light-reflecting surface for setting the irradiation direction of a lamp penetrates the rocking fulcrum part supported by the reference member and the reference member in the front-back direction and is supported by the reference member. It is supported by three points, the horizontal aiming screw and the vertical aiming screw, and by rotating the aiming screw, the tilting member is tilted in the vertical and horizontal directions with respect to the reference member to adjust the irradiation angle of the headlamp. In the tilting member movable type automobile headlamp, a tilt measuring device for measuring the tilt of the tilting member is interposed between the reference member and the projection of the aiming screw to the rear of the reference member. The container is supported by the reference member and extends substantially parallel to the projection of the aiming screw toward the rear of the reference member. An aiming screw support nut that is screwed into a protruding portion of the screw toward the rear of the reference member, a slide case slidably assembled to both the aiming screw support nut and the guide member, and rotatable to the slide case. A zero adjustment screw that is supported and arranged in parallel with the aiming screw, and that is screwed into a second female screw portion formed on the aiming screw support nut, and is formed at a predetermined position between the guide member and the slide case. A headlamp for an automobile, comprising: a scale indicating a relative displacement amount of the both, and a stopper for preventing the slide case from falling off on the guide member. 2. The headlamp for an automobile according to claim 1, wherein the reference member is a lamp body, and the tilting member is a reflector that can tilt within the lamp body. 3. The automobile head according to claim 1, wherein the reference member is a lamp housing, and the tilting member is a lamp body / reflector unit having an inner peripheral surface integrally formed with a reflector. lamp.