JPH0855501A - Headlamp for automobile - Google Patents

Abstract

PURPOSE:To provide an automobile headlamp with a tilt measuring device which facilitates the turning operation of an aiming screw. CONSTITUTION:A reflector 4 is tilted in a horizontal direction relative to a lamp body 2 by a turning quantity of a screw 20 to adjust the irradiation angle of the horizontal direction of a lamp. A backward extending external thread part 20a is provided in the screw 20, and a guide member 60 extending in parallel to the external thread part 20a is provided in the lamp body 2. A tilt measuring device composed of a nut member 50 moving back and forth along the guide member 60 interlocking with the rotation of the external thread part 20a and the screwed screw 20, a cursor 74 provided in the nut member 50 and linear graduations provided in the guide member 60 is provided between the external thread part 20a and the guide member 60. A crown-like gear 23 engaged with the tip of tooth of a screwdriver extended in the direction of perpendicularly crossing the screw 20 is provided in the base position of the external thread part 20a to facilitate the turning operation of the aiming screw 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlamp for an automobile equipped with a measuring device for confirming whether or not the irradiation direction of the lamp in the left-right direction, that is, the irradiation angle in the left-right direction of the lamp is in a normal position. The present invention relates to an automobile headlamp that can be easily adjusted to a normal position when the irradiation angle of the lamp in the left-right direction is not at the normal position.

[0002]

2. Description of the Related Art A headlamp for an automobile will be described by taking a movable reflector headlamp in which a reflector is tiltably supported in a lamp body as an example. As shown in FIG. The back side of 202 is supported by three aiming screws 203, 204 extending in the front-rear direction and one swing fulcrum 205. 16 is a front view of the reflector, and the aiming screw 2
Each of 03 and 204 extends in a direction perpendicular to the paper surface.
The aiming screws 203 and 204 are the lamp body 2
01 is rotatably supported on the back wall of the reflector 01 by the aiming screws 203 and 204.
The support point of 02 is the swing fulcrum 205 when viewed from the front of the lamp.
For example, they are arranged orthogonally. Then, by rotating the aiming screws 203 and 204, the reflector 202 is tilted around the horizontal axis Lx and the vertical axis Ly, respectively, and the irradiation angle of the lamp is adjusted.
Reference numeral 206 is a bulb that is a light source mounted on the reflector 202.

As shown in FIG. 17, for example, the tilt measuring device is fixed to the rear wall of the lamp body 201 and extends to the rear of the aiming screw 203 and a guide member 212 which extends parallel to the aiming screw 203. A nut member 214 that is screwed into the male screw portion 203b,
A slide case 215 slidably assembled to the nut member 214 and the guide member 212, and the guide member 2.
12 and the reference point 21 provided between the slide case 215
6 and the linear scale 217 and the circular hole 215a of the slide case 215, and the female screw portion 21 of the nut member 214.
4a and screw the nut member 214 into the slide case 21.
5 and a zero adjustment screw 218 that slides back and forth with respect to FIG.

Alternatively, as shown in FIGS. 18 and 19, a U-shaped nut member 214 having an opening on one side that is screwed into the aiming screw 203 and is attached to and integrated with the nut member 214. , Guide member 2
Zero adjusting plate 218 that can be engaged with 12 and can slide along the guide member 212, a cursor 218a provided between the plate 218 and the guide member 212, and a scale 2
A tilt measuring device (Japanese Patent Laid-Open No. 5-290604) having a simple structure, which is composed of 17 and 17, has also been proposed.

Then, in order to adjust the left and right irradiation angle of the headlamp, as shown in FIGS. 17 and 18, the driver D is engaged with the rear end engaging portion 203a of the aiming screw 203 from the rear side of the lamp body 201. Figure 1
In the tilt measuring device having the structure shown in FIG. 7, the reference point 216 is the scale 2
In the inclination measuring device having the structure shown in FIG. 18, the driver D (aiming screw 203) is rotated until the cursor 218a coincides with the zero point of the scale 217 until it coincides with the zero point of 17.

[0006]

However, in the above-described conventional headlamp, since the engaging portion 203a for engaging the driver for rotating the aiming screw 203 is provided at the rear end of the aiming screw, the aiming screw is not provided. In order to rotate 203, the operator looks into the back side of the headlamp from the front end of the vehicle, and the driver D is forced to take an unreasonable posture so that the tooth tips of the driver D face the engaging portion 203a. There has been a problem that the rotating work (adjustment of the irradiation angle of the headlamp) cannot be performed smoothly.

When the driver D is rotated, the aiming screw 203 is pushed by the driver D and swings up, down, left, and right, and the aiming screw bearing portion of the lamp body 201 is worn away, which may cause play in the bearing portion. is there. Further, in order to rotate the aiming screw 203 smoothly, the driver D is moved to the aiming screw 20.
It is necessary to rotate the screwdriver while keeping it coaxial with the screwdriver 3. However, since the driver D is turned in an unreasonable posture, the tooth tip of the driver D comes off the engaging portion 203a and hits the nut member 214 or the guide member 212. There is also the problem of damaging these.

Further, in the conventional inclination measuring device, since the nut member 214 is moved forward and backward along the male screw portion 203b extending rearward of the lamp body of the aiming screw 203, the extending male screw portion 2 of the aiming screw is used.
Since 03b has a structure in which it is largely projected to the rear of the lamp body, the depth of the headlamp in the front-rear direction is large, and there are many restrictions in installing the headlamp on the vehicle body.

The present invention has been made in view of the above-mentioned problems, and a first object thereof is to a side of the headlamp (a direction above and below or to the left and right) which is a direction orthogonal to the extending direction of the aiming screw. ), The aiming screw can be rotated by a driver extended (inserted), so that the aiming screw can be easily rotated, and the tilt measuring instrument component is damaged when the aiming screw is rotated. The purpose of the present invention is to provide an automobile headlamp that does not have the

A second object is to separate the male screw portion, which is integrally provided at the rear end portion of the aiming screw, from the aiming screw and dispose the male screw portion along the reference member so that the head lamp can be moved in the front-rear direction. An object of the present invention is to provide an automobile headlamp that can be reduced in depth.

[0011]

In order to achieve the above object, in a tilt measuring device for a vehicle headlamp according to claim 1, a tilting member having a light reflecting surface for setting the irradiation direction of the lamp is a reference member. With respect to the tilting member, the tilting member is tiltably supported by an angle corresponding to the turning amount of the aiming screw by pivotally operating the aiming screw that extends forward through the reference member and is rotatably supported at the penetrating portion. In a tiltable member movable type automotive headlamp that can tilt in the left-right direction with respect to a reference member to adjust the irradiation angle of the headlamp in the left-right direction, the aiming screw is provided with a male screw portion extending rearward of the reference member. The reference member is provided with a guide member extending parallel to the male screw portion of the aiming screw, and the male screw portion and the guide member are provided. Between the members, a nut member that is screwed into the male screw portion, abuts against the guide member and is prevented from rotating, and moves forward and backward along the guide member in association with the rotation of the aiming screw, and the nut member and the guide member. Comprising a relative scale provided between, provided with an inclination measuring device for measuring the inclination of the tilting member in the left-right direction, at the male screw portion root position of the aiming screw, extending from the direction orthogonal to the aiming screw extending direction. In addition, a coronal gear that meshes with the tips of the driver's teeth is provided.

According to another aspect of the present invention, there is provided a tilt measuring device for a headlamp for an automobile, wherein the tilting member having a light reflecting surface for setting the irradiation direction of the lamp is tiltably supported with respect to the reference member, and the reference member is used. By rotating the aiming screw pierced forward and rotatably supported at the penetrating portion, the tilting member tilts in the left-right direction with respect to the reference member by an angle corresponding to the amount of rotation of the aiming screw, and the headlamp. In a tiltable member movable type automobile headlamp capable of adjusting the irradiation angle in the left and right direction of the above, in the reference member, a rotatable driven shaft formed with a male screw portion is provided in the vicinity of a protruding portion of the aiming screw to the rear of the reference member. Along the reference member in a direction substantially orthogonal to the extending direction of the aiming screw from the position,
A guide member extending parallel to the male screw portion of the driven shaft is provided, and an orthogonal conversion gear for interlocking rotation of the driven shaft and the aiming screw between the driven shaft and the protrusion of the aiming screw to the rear of the reference member. A mechanism is interposed, and between the male screw portion and the guide member, the male screw portion is screwed together, abuts against the guide member and is prevented from rotating, and is moved forward and backward along the guide member in association with the rotation of the aiming screw. And a relative scale provided between the nut member and the guide member to provide a tilt measuring device for measuring the tilt of the tilting member in the left-right direction, and the projection of the aiming screw to the rear of the reference member. At the root position of the portion, a coronal gear that extends from a direction orthogonal to the extending direction of the aiming screw and that meshes with the tooth tips of the driver is provided.

[0013]

When the aiming screw is rotated, the tilting member is tilted in the left-right direction with respect to the reference member (in claim 2, the driven shaft is rotated in association with the rotation of the aiming screw), and the nut member is aimed. It advances and retreats along the male screw portion (in the second aspect, the male screw portion of the driven shaft) extending to the rear of the screw. The amount of tilting of the tilting member relative to the reference member due to the turning of the aiming screw is proportional to the amount of turning of the aiming screw, and the amount of movement of the nut member along the guide member is also proportional to the amount of turning of the aiming screw. The tilting amount of the tilting member with respect to the reference member, that is, the deviation amount of the irradiation angle of the headlamp in the left-right direction is
It appears as a change in the scale between the nut member and the guide member. Therefore, it is possible to know from the change in the scale whether the irradiation angle of the headlamp in the left-right direction is proper, 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.

In any of claims 1 and 2,
To rotate the aiming screw, for example, insert a driver from above the headlamp along the reference member, engage the tooth tips with the coronal gears, and rotate the driver. is there.
In particular, since the reference member acts as a side guide of the driver, it is difficult for the tooth tips of the driver to be disengaged from the crown gear.

Further, according to the second aspect, since the nut member is moved in the direction along the reference member (the direction substantially orthogonal to the aiming screw) by rotating the aiming screw, the tilt measuring device is provided to the rear of the reference member. The amount of protrusion is small.

[0016]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 9 show an embodiment in which the present invention is applied to a reflector movable headlamp in which a reference member is a lamp body and a tilting member is a reflector, and FIG. 1 is a reflector in which a tilt measuring device is assembled. A front view of the movable headlamp, FIG. 2 is a horizontal sectional view of the headlamp (a sectional view taken along line II-II shown in FIG. 1), and FIG. 3 is a vertical sectional view of the headlamp (line III shown in FIG. 1). -Cross-sectional view taken along line III), Fig. 4 is a perspective view of an inclination measuring device for measuring the inclination of the irradiation angle of the headlamp in the left-right direction, Fig. 5 is a perspective view of the periphery of the bearing of the aiming screw, and Fig. 6 is an aiming screw. FIG. 7 is a longitudinal sectional view around the bearing portion of FIG. 7, FIG. 7 is a perspective view of a nut member which is a main constituent member of the inclination measuring instrument, and FIG. Fig. 9 is a nut member. Horizontal sectional view of the uneven elastic locking portion between the guide member (cross-sectional view taken along the line IX-IX shown in FIG. 8), FIG. 10 is an explanatory view describing a manner of assembling the same inclination measuring instrument headlamp.

In these figures, reference numeral 2 is a container-shaped lamp body which is a reference member, and a parabolic reflector 4 which is a tilting member in which a bulb 3 which is a light source is inserted is installed in the lamp body 2. The front lens 6 is mounted in the front opening of the lamp body 2 and integrated as a headlamp. The reflector 4 is shown in FIGS.
As shown in FIG. 3, in the lamp body 2, the ball joint 10, the horizontal aiming screw 20, and the vertical aiming screw 30 are supported by three points. The ball portion 12 of the ball joint 10 is fixedly supported on the lamp body 2 side, and the ball receiving portion 14 that engages with the ball portion 12 is inserted and fixed to the bracket 7 projecting on the rear surface side of the reflector 4 to fix the reflector 4. Has a structure capable of swinging around the ball joint 10. Also aiming screw 20,
Numeral 30 is made of metal, and both extend through the lamp body 2 to the front and back, and the push-on fix 8 is provided at the penetrating portion.
Is supported by the lamp body 2 and is rotatably supported by the lamp body 2. The front ends of the screws 20, 30 are screwed into screw support nuts 21, 31 which are screw support parts made of synthetic resin on the reflector 4 side.

As shown in FIGS. 4 and 6, a coronal gear 23 with which the tooth tip D ₁ of the driver D can be engaged is integrally formed at the root position of the extending portion of the aiming screw 20 to the rear of the lamp body. , The tooth tip D ₁ of the driver inserted along the back wall of the lamp body 10 is engaged with the gear 23, and the driver D is rotated to rotate the aiming screw 20. It moves back and forth along with it, whereby the inclination of the reflector 4 changes.

On the other hand, a jig engaging portion indicated by reference numeral 33 in FIG. 3 is provided on the protruding portion of the aiming screw 30 toward the rear of the lamp body. Inside the jig engaging portion 33, the driver engaging portion 33 with which the tooth tip D ₁ of the driver D can be engaged.
a is a wrench engaging portion 3 to which a hexagon wrench can be engaged on the outside
3b is formed, for example, as shown in FIG. 3, using a driver D extending from the rear of the headlamp, or a hexagon wrench (not shown) extending from above the headlamp along the rear wall of the lamp body 2. ) Can be used to rotate the aiming screw 30.

That is, the horizontal aiming screw 20
The supporting point of the reflector 4 (the screwing portion of the aiming screw 20 and the screw supporting nut 21) is located on the horizontal axis Lx passing through the ball joint 10 at right angles to the irradiation axis L (see FIG. 2) of the headlamp, Support points of the reflector 4 by the vertical aiming screw 30 (a screwing portion of the aiming screw 30 and the screw support nut 31)
Is a vertical axis Ly passing through the ball joint 10 at right angles to the horizontal axis Lx.
Located on top. Therefore, the aiming screw 20
When (30) is rotated, the screw support nut 21
(31) advances and retreats along the screw 20 (30), the reflector 4 tilts about the vertical axis Ly (horizontal axis Lx), and the reflector 4 as a tilting member has a left-right direction with respect to the lamp body 2 as a reference member ( It is possible to adjust the inclination in the up-down direction, that is, the irradiation angle in the left-right direction (up-down direction) of the headlamp.

As shown in FIGS. 5 and 6, a cylindrical driver integrally formed on the lamp body 2 is provided at the peripheral edge of the screw insertion hole 2a of the lamp body 2 through which the aiming screw 20 penetrates. The support portion 40 extends rearward. An annular recess 41 is formed on the inner peripheral edge of the extension end side opening of the driver support portion 40, and an O-ring 42 that seals the screw insertion hole 2a in the recess 41 is formed.
Is loaded. As shown in FIG. 6, the teeth 23a of the crown gear 23 are formed only on the outer peripheral edge portion of the crown gear main body, and the smooth surface 23b is formed on the inner peripheral edge side thereof. On fix 8
The aiming screw 20 spring-biased forward (in the direction of the arrow in FIG. 6) by the smooth surface 23b of the gear 23 compresses the O-ring 42 and slides against the extended end surface 40a of the driver support portion 40 to axially move. Positioned on the aiming screw bearing (screw insertion hole 2
Smooth rotation in a) is ensured.

On one side of the driver support portion 40 in the left-right direction (the side on which the guide member 60, which will be described later, is not provided), the lamp support body 2 is integrally formed, and approximately half the outer circumference of the crown gear 23 is formed. Surrounding arc-shaped standing wall 45
Is provided, and the cords and the like have teeth 23 of the coronal gear 23.
It prevents being caught in a. Reference numeral 45a is a reinforcing rib that extends radially from the driver support portion 40 to the standing wall 45. A driver engaging portion 46 having a vertically extending cylindrical inner peripheral surface 46 a and a flat driver tip abutting surface 46 b formed on the upper side surface of the driver supporting portion 40 is formed on the upper portion of the standing wall 45. , Abutment surface 46
The driver D in a state where the tooth 23a of the coronal gear 23 and the tooth top D ₁ mesh with each other by bringing the tip of the driver into contact with b,
Since its side surface is guided by the cylindrical inner peripheral surface 46a,
The driver D can be rotated without wobbling. Further, on the upper part of the driver engaging portion 46,
Upper driver introduction portion 46c which widens in the left and right are formed, addendum D ₁ of the driver pledged from above the driver engaging portion 46 to slide along the inlet portion 46c
Is being led to.

In FIGS. 2 and 4 to 6, reference numeral 20a indicates
A guide screw 60 is integrally formed with the lamp body 2 on the rear wall of the lamp body 2, which is a male screw portion integrally formed on the rearward projecting portion of the left-right aiming screw 20 from the lamp body 2. Is formed in. The guide member 60 has a substantially U-shaped cross section and has a structure in which bending rigidity and torsional rigidity are enhanced. A first inclination measuring device for measuring the inclination of the reflector 4 in the left-right direction, that is, the inclination of the irradiation angle of the headlamp in the left-right direction is assembled between the guide member 60 and the male screw portion 20a of the aiming screw. . As shown in FIGS. 7 and 8, this inclination measuring device has a first leg 53a, a second leg 53b and a third leg 53c, is screwed into the aiming screw male screw portion 20a, and is also a guide member 6
A nut member 50 having a rectangular shape in a plan view and a Y-shape in a front view assembled so as to be slidable forward and backward with respect to 0, and a relative scale (cursor 74 which is provided between the nut member 50 and the guide member 60).
And a linear scale 63).

As shown in FIG. 7, in the nut member 50, the divided part 53c _{2 of} the third leg 53c swings along the remaining part 53c ₁ of the leg 53c and with respect to the leg 53b. With the structure that can be formed, the legs 53a and 53b and a part of the leg 53
a linear scale 63 provided on the guide member 60 having c _1.
Is provided with a cursor 74 corresponding to, and has a slide portion 51 slidable along the guide member 60 and the male screw portion 20a, and a female screw portion 56a having a leg portion 53c ₂ and aligned with the male screw portion 20a. It is composed of a substantially rectangular screw grip portion 56 that is integrated with the slide portion 51 via a hinge 55. Then, in the state where the female screw portion 56a of the screw grip portion 56 is screwed into the male screw portion 20a of the aiming screw (see FIG. 8), the tilt amount of the reflector 4 in the left-right direction (the tilt amount about the vertical axis Ly) of the slide portion 51 is set. Since it appears as the amount of movement of the cursor 74, the cursor 74 is previously set to the zero point 63 of the scale 63.
By adjusting the position to a (hereinafter referred to as zero adjustment), the reflector 4 is moved from the scale displayed by the cursor 74.
It is possible to know the degree of inclination in the left-right direction.

The slide portion 51 and the screw grip portion 5
6 is an integrally molded body of synthetic resin such as nylon or ABS,
The structure is such that the thin hinge 55 connecting the two 51, 56 can be relatively swung (see the arrow in FIG. 7) around the swing center.
As shown in FIG. 10, a circular hole 52 having a diameter larger than that of the aiming screw male screw portion 20a is formed between the second leg 53b and the third leg 53c ₁ of the slide portion 51.
The circular hole 5 formed to be slightly narrower than the outer diameter of the circular hole 52.
The aiming screw male screw portion 20a can be introduced into the circular hole 52 from the two opening side. That is, FIG.
As shown in FIG. 0, the screw-introducing inclined surfaces 53b ₁ and 53 formed at the lower ends of the facing surfaces of the legs 53b and 53c _1.
c ₃ is in the strike the aiming screw male thread portion 20a, the slide portion 51 male thread portion 20a side (FIG. 10
If pressed downward), leg 53b, and 53c ₁ is pushed open to the outside by the elastic (Fig. 10 arrow see B, C), the male screw portion 20a is engaged (loosely fitted) into the circular hole 52.

Further, the leg 53 on the side which abuts the guide member 60.
A hook 54a that bulges outward (to the side of the guide member 60) is formed at the lower end of a, and the hook 54a is
Eaves-shaped horizontal guide 5 formed on the upper end of the leg 53a
4b in cooperation with the nut member 50 to keep the guide member 60 engaged. That is, the hook 54a
An inclined surface 54a ₁ is formed on the outer surface of the nut member 5
When engaging 0 with the male screw portion 20a (when introducing the male screw portion 20a into the circular hole 52), the inclined surface 54a ₁
Is pushed by the side projection 62 of the guide member 60,
The guide member 60 is elastically deformed inward as shown by an arrow A.
Side projections 62 of the horizontal guide 54b of the nut member 50.
The leg 53a of the nut member 50 is engaged with the concave portion between the hook 54a and the hook 54a and is prevented from coming off in the upward direction.

On the other hand, a female screw portion 56a is formed on the side of the screw grip portion 56 facing the circular hole 52. Further, at the lower end (swing end) of the screw grip portion 56, the engaging recess 5 formed at the lower end of the leg 53b of the slide portion 51.
7b is formed with an elastic hook 57a,
When the elastic hook 57a is engaged with the engagement concave portion 57b, the screw gripping portion 56 causes the male screw portion 2 of the aiming screw to move.
0a is locked in a gripped state, and the screw grip 5
The female screw portion 56a of No. 6 is held in a state of being screwed into the male screw portion 20a of the screw. That is, when the elastic hook 57a is engaged with the engagement recess 57b and the screw grip portion 56 grips the screw male screw portion 20a (the female screw portion 56a and the screw male screw portion 20a are screwed together), the leg 53 is
The outer surface of a contacts the guide member 60 and the nut member 50
Is stopped, the nut member 50 slides back and forth along the guide member 60 by an amount proportional to the amount of rotation of the aiming screw 20 in association with the rotation of the aiming screw 20.

As shown in FIG. 9, reference numeral 58 denotes a leaf spring-like elastic engaging piece extending in parallel from the leg 53a of the slide portion 51 along the leg 53a.
In a state in which the aiming screw male screw portion 20a is loosely fitted in the circular hole 52 of the front end bulge portion 58 of the elastic engaging piece 58.
a urges and abuts against the side surface convex portion 62 of the guide member 60.
Furthermore, the cursor 74 is set so as to be at the scale zero point 63a at the position where the bulging portion 58a is engaged with the V-shaped groove 64 provided on the side surface protruding portion 62 of the guide member 60. By engaging the tip bulging portion 58a with the V-shaped groove 64, there is an action of temporarily fixing the nut member 50 to this predetermined position, that is, the scale zero point position. Reference numeral 59 is the lower end (swing end) of the screw grip 56.
It is a knob for operating the screw grip portion, which is formed to project laterally.

It should be noted that the thin-walled hinge 55 is internally provided with an initial stress that urges the screw grip portion 56 to rotate counterclockwise in FIG. 7 (arrow direction). That is, when the slide portion 51 and the screw grip portion 56 are integrally molded, as shown in FIG. 10, the thin hinge 55 is molded in a state where the thin hinge 55 extends straight, and as shown in FIG. 8, the elastic hook of the screw grip portion 56 is formed. In the state in which 57a is engaged with the engaging recess 57b of the slide portion 51, the bending stress of restoring the thin hinge 55 is inherent. For this reason, when the elastic hook 57a is disengaged from the engaging recess 57b, the screw grip 56 naturally swings around the thin hinge 55 due to the restoring force of the thin hinge 55 and jumps up as shown in FIG. It becomes a state. Therefore, the screw grip portion 56 and the aiming screw male screw portion are disengaged by pinching the knob 59 with a finger, or by disengaging the engaging recess 57b of the elastic hook 57a using a jig for rotating the aiming screw such as a driver. The screwed state of 20a can be easily released (the connection between the nut member 50 and the aiming screw 20 can be easily released).

The aiming adjustment and the zero point adjustment of the scale in the inclination measuring device are performed as follows. As shown in FIG. 8, the screw grip portion 56 has the screw male screw portion 2
0a, and the nut member 50 and the aiming screw 20 are linked to each other, from the hook 57a and the engagement recess 57.
The engagement of b is disengaged and the screw grip 56 is flipped up, and the nut member 50 and the screw male screw portion 20a
End the relationship with. Next, when the nut member 50 is slid along the guide member 60 and the tip bulging portion 58a of the elastic engaging piece 58 is engaged with the V-shaped groove 64, the cursor 74 is automatically at the scale zero point 63a position. That is, the zero point of the scale can be adjusted.

Next, using a driver D inserted from above the headlamp along the rear wall of the lamp body 2,
Aiming adjustment is performed by rotating the aiming screw 20. Since the nut member 50 and the aiming screw 20 are not linked to each other, the nut member 50 is hardly affected even when the aiming screw 20 is rotated, and moreover, the elastic engaging piece 5 on the nut member 50 side.
8 (tip bulging portion 58a) and the V-shaped groove 6 on the guide member 60 side
4, the nut member 50 is biased and held at the scale zero point position (the position where the cursor 74 indicates the zero point 63a), so that aiming adjustment can be performed without disturbing the scale zero point adjustment state.

After the aiming adjustment is completed, the screw grip 56 is swung around the thin hinge 55,
When the elastic hook 57a is engaged with the engagement recess 57b, the nut member 50 holds the female screw portion 20a (the female screw portion 56a and the male screw portion 20a are screwed together), and the aiming screw 20 is rotated. Motion and nut member 50
The state is linked with the sliding operation of (the state in which the deviation of the irradiation angle of the headlamp can be detected). This nut member 5
When the aiming screw 20 is rotated by using the driver D in a state in which 0 and the aiming screw 20 are linked, the nut member 50 exerts an engagement holding force by the engagement of the elastic engaging piece 58 and the V-shaped groove 64. Since it can slide against, the tilt measuring device properly displays the deviation of the irradiation angle of the headlamp in the left-right direction. In other words, when the reflector 4 tilts due to vibration or the like, the aiming screw 20 rotates with respect to the screw support nut 21 as the reflector tilts.
With the rotation of 0, the nut member 50 advances and retreats along the male screw portion 20a of the screw, that is, the nut member 50 slides along the guide member 60 exactly by the tilt amount of the reflector 4, and this shifts the scale ( It appears as a scale indicated by the cursor 74).

To assemble this first inclination measuring device to the aiming screw 20, as shown in FIG. 10, the nut member 50 (slide part 51) is assembled to the male screw part 20a from above the aiming screw male screw part 20a. Attach (play). That is, with the screw gripping portion 56 flipped up, the opening side of the slide portion 51 faces downward, and the aiming screw male screw portion 20a is introduced into the circular hole 52 along the screw introducing inclined surfaces 53b ₁ and 53c ₃ . The circular hole 52 is engaged (played) with the male screw portion 20a. Then, the nut member 50 (slide portion 51) is slid along the guide member 60, and the tip end bulging portion 5 of the elastic engagement piece 58 is slid.
When 8a is engaged with the V-shaped groove 64 of the guide member 60, the slide portion 51 is naturally held at the zero-adjusted position. In addition, the aiming screw external thread portion 20a is provided with a circular hole 5
At the time of engaging (playing) with 2, the screw male screw portion 20a may be introduced into the circular hole 52 with the tip bulging portion 58a of the elastic engaging piece 58 aligned with the V-shaped groove 64 position. Of course, in this way, the zero point is adjusted when the nut member 50 is engaged (played) with the aiming screw 20.

In FIGS. 1 and 2, reference numeral 70 is a bubble tube inclination measuring device for measuring the vertical inclination of the reflector 4, that is, the vertical inclination of the irradiation angle of the headlamp. The measuring device 70 is attached to the upper wall of the reflector 4 and has a container-like casing 71 that opens upward, a lid 72 that is supported by the casing 71 so as to be swingable with respect to the horizontal axis Lx, and this lid. The straight bubble tube 74 is suspended and supported by 72 and is housed in the casing 71. Reference numeral 76 is an adjusting screw for adjusting the zero point of the bubble tube 74.

In the embodiment described above, the crown gear 23 and the male screw portion 20a are the metal aiming screw 20.
11A, the metal crown gear 23A, which is a separate member, is integrated by fitting it to the aiming screw 20 integrally formed with the male screw portion 20a, as shown in FIG. 11A. Alternatively, as shown in FIG. 11B, a structure in which a synthetic resin crown gear 23B is integrated by insert molding with a metal aiming screw 20 integrally formed with a male screw portion 20a may be used.
Further, as shown in FIG. 11 (c), a front end engaging concave portion 20e of a synthetic resin male screw portion 20d, which is a separate member, is formed in a rear end engaging convex portion 20c of the metallic aiming screw 20 integrally formed with the crown gear 23. The structure may be such that the aiming screw 20 and the male screw portion 20d are connected and integrated by press-fitting and fixing.

FIG. 12 is an exploded perspective view of an inclination measuring device which is a main part of a movable reflector headlamp according to a second embodiment of the present invention. In the second embodiment, the inclination measuring device unit U ₁ is constructed by assembling and integrating the screw male screw portion 20a, the guide member 60 and the nut member 50 in the _first embodiment. It shows a unitized tilt measuring device in which the measuring device unit U ₁ only has to be screwed in place on the lamp body 2.

That is, reference numeral 80 is a frame-shaped measuring instrument case, and the front and rear frames 81 and 82 facing each other in the front-rear direction are opened upward, and bearings 81a and 8 which support both ends of the male screw portion 20f.
2a is formed. The male screw portion 20f is made of metal, and the aiming screw 20 is attached to the front end portion of the male screw portion 20f.
An engaging concave portion 20g that can be engaged with an engaging convex portion 20c that is provided at the rear end portion is provided. Side frame 83 of case 80
Corresponds to the guide member 60 in the first embodiment, and a linear scale 63 is provided on the upper surface of the side frame 83, and a side surface ridge 62 is provided on the inner side surface of the side frame 83. There is. The front frame 81 is formed with a pair of left and right flange portions 84 each provided with a screw insertion hole 85. On the other hand, on the rear wall of the lamp body 2, the screw insertion hole 8 is formed.
Screw holes 86, 86 corresponding to Nos. 5, 85 are provided, and the flange portion 84 is fixed to the lamp body 2 by a screw 87.
Can be fixed to.

Therefore, the nut member 50 is assembled to the male screw portion 20f rotatably supported by the case 80 to be integrated as the measuring instrument unit U ₁ , and then the male screw portion 20.
The front end engaging concave portion 20g of f is aligned so as to engage with the rear end engaging convex portion 20c of the aiming screw 20,
The measuring device unit A may be screwed to the back surface of the lamp body 2. Reference numeral 88 is a driver contact guide integrally formed with the lamp body 2, and is the first contact guide.
This is equivalent to the driver engaging portion 46 in the embodiment.

13 and 14 show a third embodiment of the present invention. FIG. 13 is a plan view of an inclination measuring instrument which is a main part of a reflector movable headlamp, and FIG. It is an exploded perspective view. In the first and second embodiments described above, the male screw portion 20a is coaxially provided at the rear end portion of the aiming screw 20, but in the present embodiment, the male screw portion is separated from the aiming screw 20. At the same time, a male screw portion is arranged in a direction orthogonal to the extending direction of the aiming screw 20. That is, reference numeral 90 denotes a driven shaft having an external thread portion 20a formed on the outer peripheral surface thereof, which is supported by bearing members 92 and 93 projectingly formed on the rear surface of the lamp body 2 and arranged in a horizontal direction orthogonal to the aiming screw 20. Thus, the lamp body 2 extends along the rear wall.

At the rear end of the aiming screw 20,
The crown gear 23 and the bevel gear 94 are integrally formed,
A bevel gear 95 that meshes with the bevel gear 94 is provided at the tip of the driven shaft 90. That is, the bevel gears 94 and 95 constitute an orthogonal conversion gear mechanism that transmits the rotation of the aiming screw 20 to the driven shaft 90 that is orthogonal to the aiming screw 20. The rear wall of the lamp body 2 between the bearing members 92 and 93 is formed in a shape corresponding to the guide member 60 in the first embodiment. That is,
A linear scale 63 is formed on the horizontal strip of the lamp body 2, a convex strip 62 on which the nut member 50 can slide is formed on the back side of the horizontal strip, and a V-shaped groove 64 is formed on the convex strip 62. Is provided to configure the guide portion 91.
Others are the same as those in the first embodiment described above, and the description thereof will be omitted by giving the same reference numerals.

In the third embodiment, unlike the first and second embodiments described above, the structure in which the male screw portion is largely projected to the rear surface side of the lamp body 2 is not so large. The depth of direction is small. Therefore, the space for disposing the headlamp is small, and the degree of freedom in designing the headlamp in the automobile is high. At the rear end of the aiming screw 20, the tooth tip D of the driver D is
_A jig engaging portion 94a capable of engaging with ₁ and also with a hexagon wrench (or a hexagon spanner) is provided, and when it is difficult to rotate the coronal gear 23 using the driver D,
The jig engaging portion 94a may be rotated by the driver D and the hexagon wrench (or hexagon spanner).

FIG. 15 is a view showing a fourth embodiment of the present invention, and is a perspective view of an inclination measuring device which is a main part of a headlamp for a movable reflector type vehicle. In this embodiment, the driven shaft 90 and the bearing member 92 in the third embodiment,
93, the guide part 91, and the nut member 50 are integrated as a measuring device unit U ₂ . That is, the bearing member 9
The driven shaft 90 and the nut member 50 are attached to the frame-shaped measuring instrument case 96 in which the second and the third 93 and the guide portion 91 are integrally formed.
Is assembled and integrated as a measuring device unit U ₂ , the driven shaft side bevel gear 95 meshes with the aiming screw side bevel gear, and the flange portion 97 provided on the case 96 is screwed to the lamp body. ing.

In the various embodiments described above, the present invention has been described with reference to a reflector movable headlamp in which the reference member is the lamp body and the tilting member is the reflector. However, in the present invention, the reference member is the lamp housing. It is obvious that the tilting member can be similarly applied to a unit movable type headlamp which is a lamp body / reflector unit in which a lamp body and a reflector are integrated.

[0044]

As is apparent from the above description, according to the vehicle headlamp of the present invention, the aiming screw can be rotated by the driver extended from the side of the headlamp, for example, from above, so that the operator can operate. Does not require an unreasonable posture unlike the conventional one, and can adjust the irradiation angle of the headlamp in the left-right direction smoothly.

Further, since the driver is not rotated in an unreasonable posture, it is difficult for the tooth tip of the driver to be disengaged from the engaging portion on the aiming screw side. There is no problem of damaging the member. In addition, since the crown gear provided at the root of the rear projection of the aiming screw is rotated by the driver, the load acting on the aiming screw bearing during the turning operation is small and the durability of the aiming screw bearing is also improved. To do.

According to the second aspect of the present invention, the tilt measuring instrument has a structure in which the nut member slides along the male screw portion of the driven shaft arranged in the direction orthogonal to the aiming screw. The amount of protrusion to the rear of the reference member is small, so the depth of the headlamp in the front-rear direction is reduced, and the degree of freedom in disposing the headlamp on the vehicle body is significantly improved.

[Brief description of drawings]

FIG. 1 is a front view of a movable reflector headlamp that is a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the headlamp (line II shown in FIG. 1).
-Cross section along II)

FIG. 3 is a vertical cross-sectional view of the same headlamp (see line III in FIG. 1).
-Cross section view along III)

FIG. 4 is a perspective view of a tilt measuring device that measures the tilt of the irradiation angle of the headlamp in the left-right direction.

FIG. 5 is a perspective view around the bearing of the aiming screw.

FIG. 6 is a cross-sectional view around the support portion of the aiming screw.

FIG. 7 is a perspective view of a nut member which is a main constituent member of the tilt measuring device.

FIG. 8 is a view showing a part of the same tilt measuring device in a broken manner (view from the back side of the headlamp).

FIG. 9 is a horizontal sectional view of a concave-convex elastic locking portion between the nut member and the guide member (a sectional view taken along line IX-IX shown in FIG. 8).

FIG. 10 is an explanatory view for explaining how the tilt measuring instrument is assembled to a headlamp.

FIG. 11 is a cross-sectional view showing various other structures that integrate the aiming screw, the crown gear, and the male screw part.

FIG. 12 is an exploded perspective view of an inclination measuring device which is a main part of an automobile headlamp according to a second embodiment of the present invention.

FIG. 13 is a plan view of an inclination measuring device which is a main part of a headlamp according to a third embodiment of the present invention.

FIG. 14 is an exploded perspective view of the tilt measuring instrument.

FIG. 15 is a perspective view of a tilt measuring instrument which is a main part of a headlamp according to a fourth embodiment of the present invention.

FIG. 16 is a front view of a conventional headlamp.

FIG. 17 is a tilt diagram of a tilt measuring device according to a first conventional technique.

FIG. 18 is a perspective view of a tilt measuring device according to a second conventional technique.

FIG. 19 is a vertical sectional view of a tilt measuring device according to a second conventional technique.

[Explanation of symbols]

2 Lamp body 2a which is a reference member 2a Aiming screw insertion hole 3 Bulb which is a light source 4 Reflector which is a tilting member 6 Front lens 10 Ball joint as a swinging fulcrum of the reflector 20 Left-right direction aiming screw 20a, 20f Male screw portion 23 Coronal gear 30 Vertical direction aiming screw 50 Nut member which is the main part of the tilt measuring device for measuring the tilt of the left and right irradiation angle of the headlamp 51 Sliding part 52 Circular hole formed in the sliding part 56 Screw gripping part 55 Thin hinge 56a Screw gripping Half circular arc female screw portion formed on the portion 60 Guide member 63 Scale 63a Scale zero point 74 Cursor 90 Driven shaft 94, 95 Bevel gear L constituting the orthogonal conversion gear mechanism L Headlamp irradiation axis Lx Horizontal axis Ly Vertical axis D Driver D ₁ driver The addendum

Claims (2)

[Claims] 1. A tilting member having a light reflecting surface for setting an irradiation direction of a lamp is tiltably supported with respect to a reference member, extends forward through the reference member, and is rotatably supported at a penetration portion. By rotating the aiming screw, the tilting member tilts in the left-right direction with respect to the reference member by an angle corresponding to the amount of rotation of the aiming screw, and the tilting member movable type vehicle in which the horizontal irradiation angle of the headlamp can be adjusted In the headlamp for a vehicle, the aiming screw is provided with a male screw portion extending rearward of a reference member, and the reference member is provided with a guide member extending parallel to the male screw portion of the aiming screw. Between the portion and the guide member, the male screw portion is screwed, and the guide member is brought into contact with the guide member to prevent the rotation. Inclination measurement for measuring the lateral inclination of the tilting member, which is composed of a nut member that moves forward and backward along the guide member in association with the rotation of the Liu, and a relative scale provided between the nut member and the guide member. A headlamp for an automobile, characterized in that a crown gear is provided at a root position of the male screw portion of the aiming screw, the crown gear meshing with a tooth tip of a driver extending from a direction orthogonal to an extending direction of the aiming screw. 2. A tilting member having a light reflecting surface for setting the irradiation direction of the lamp is supported so as to be tiltable with respect to the reference member, extends forward through the reference member, and is rotatably supported at the penetration portion. By rotating the aiming screw, the tilting member tilts in the left-right direction with respect to the reference member by an angle corresponding to the amount of rotation of the aiming screw, and the tilting member movable type vehicle in which the horizontal irradiation angle of the headlamp can be adjusted In the headlamp for use in the reference member, a rotatable driven shaft having a male screw portion is formed on the reference member in a direction substantially orthogonal to an extending direction of the aiming screw from a position in the vicinity of a projecting portion of the aiming screw to the rear of the reference member. And a guide member extending parallel to the male screw portion of the driven shaft is provided along the An orthogonal conversion gear mechanism for interlockingly rotating the driven shaft and the aiming screw is interposed between the protruding portion of the Liu rearward of the reference member and the driven shaft, and the male screw portion is provided between the male screw portion and the guide member. A nut member that is screwed together with the guide member, is fixed to the guide member and is prevented from rotating, and moves forward and backward along the guide member in association with the rotation of the aiming screw; and a relative scale provided between the nut member and the guide member. Is provided with a tilt measuring device for measuring the tilt of the tilting member in the left-right direction, and the projection base of the aiming screw to the rear of the reference member is extended from a direction orthogonal to the extending direction of the aiming screw. A headlamp for an automobile, which is provided with a coronal gear that meshes with the tip of the driver.