JPH08102202A - Optical axis adjusting device for automobile headlamp - Google Patents

Abstract

PURPOSE: To provide excellent workability for optical axis adjustment. CONSTITUTION: Engagement teeth 63 engaged with a tool which rotates a rotating member 6 from the direction of crossing the rotational axis 0-0 of the rotating member 6 and a hexagon head 64 to rotate the rotating member 6 from the direction of the rotational axis 0-0 of the rotating member 6 are provided at the other end of a rotating member 8. As a result, optical axis adjustment work can be done from the direction of the rotational axis 0-0 of the rotating member 6 and from the direction perpendicular thereto as well. A holder 7 is provided with a guide 70 to guide the tool from the direction perpendicular to the rotational axis 0-0 of the rotating member 6. The tool can thus be guided by the guide 70 of the holder 7 to ensure optical axis adjusting work. This improves workability for optical axis adjustment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical axis adjusting device for an automobile headlamp, and more particularly to an optical axis adjusting device for an automobile headlamp which is excellent in workability of adjusting the optical axis.

[0002]

2. Description of the Related Art An optical axis adjusting device for a vehicle headlamp of this type will be described with reference to FIGS. 7 to 9 or FIGS. 7 to 9 show a vehicle headlamp in which an operation of adjusting an optical axis is performed from a rear side of a lamp in a rotation axis direction OO of a rotary operating member 3 which will be described later, and for example, a movable front reflector vehicle. An example of the optical axis adjusting device of the lamp will be described.

In FIGS. 7 and 8, reference numeral 1 denotes a reflector movable type vehicle headlamp equipped with an optical axis adjusting device. In this automotive headlamp 1, a front lens 11 is arranged in a front opening of a lamp housing 10, and the front lens 11 and the lamp housing 10 form a lamp chamber 12. A movable reflector 13 is arranged in the lamp chamber 12,
The movable reflector 13 is attached to the lamp housing 10.
Is rotatably attached by the pivot bearing mechanism 14. On the front side of the movable reflector 13, a reflecting surface for reflecting the light from the light source bulb 15 described later to the front lens 11 side is provided. A light source bulb 15 is provided on the reflecting surface side of the movable reflector 13, and the light source bulb 15 is arranged in the lamp chamber 12. The lamp housing 10 and the movable reflector 13 are equipped with a vertical optical axis adjusting device 16 and a horizontal optical axis adjusting device 17. The movable reflector 13 is operated by operating the vertical optical axis adjusting device 16 or the horizontal optical axis adjusting device 17.
The optical axis is adjusted by rotating (including the light source bulb 15) the lamp housing 10 in the vertical direction or the horizontal direction.

Next, the above-mentioned vertical optical axis adjusting device 1
6 will be described. On the rear surface of the movable reflector 13, a mounting portion 130 is integrally provided at a position where the optical axis adjusting device 16 for vertical direction is mounted, and the mounting portion 130 has a spherical concave surface 1
The receiving portion 132 having 31 is attached. On the other hand, the mounting boss portion 100 and the tubular portion 101 are integrally provided on the outside of the lamp housing 10 where the optical axis adjusting device 16 for the vertical direction is mounted. A circular insertion hole 102, for example, is provided at the center of the end of the cylindrical portion 101 on the lamp housing 10 side. The inner diameter of the insertion hole 102 is equal to the spherical portion 2 of the advancing / retreating member 2 described later.
It is almost equal to or slightly larger than the outer shape of 0. The motor drive mechanism 103 of the vertical optical axis adjusting device 16 is attached to the attachment boss portion 100 on the outside of the lamp housing 10 with a screw 104 or the like.

In FIGS. 8 and 9, reference numeral 2 is an advancing / retreating member. The advancing / retreating member 2 has, for example, a cylindrical shape, and includes a sphere portion 20 on one end side, an oval engaging shaft portion 21 on the other end side, and an intermediate screw shaft portion 22. The ball portion 2 of this retractable member 2
0 is rotatably attached to the spherical concave surface 131 of the receiving portion 132. The screw shaft portion 22 of the advancing / retreating member 2 is rotatably supported by a motor drive mechanism 103, which will be described later. As a result, the advancing / retreating member 2 is attached to the lamp housing 10.
Will be arranged so as to be able to move forward and backward in the rotation axis direction O-O of the rotary operation member 3 described later.

In FIGS. 8 and 9, reference numeral 3 is a rotary operation member. The rotation operating member 3 has, for example, a cylindrical shape in which two parts are integrated by, for example, spline coupling. For example, a circular collar portion 30 is integrally provided on the outer peripheral surfaces of both ends of the rotation operating member 3 so as to project. A non-circular, for example, rectangular engaging hole 31 is provided from one end surface of the rotation operating member 3 to the middle of the other end. At the other end of the rotary operation member 3, a hexagonal head 32 for rotationally operating the rotary operation member 3 from the rear of the lamp in the rotation axis direction OO of the rotary operation member 3.
Are provided integrally. The engaging hole 31 of the rotation operating member 3 is engaged with the engaging shaft portion 21 at the other end of the advancing / retreating member 2 so that the advancing / retreating member 2 and the rotation operating member 3 cannot rotate relative to each other. Is movably supported in the advancing / retreating direction of the advancing / retreating member 2 (rotational axis direction OO of the rotating operation member 3), and the motor drive mechanism 103 is mounted on the lamp housing 10 by a cover 4 described later. It is arranged so as to be rotatable via and immovable in the advancing / retreating direction of the advancing / retreating member 2 (the rotation axis direction OO of the rotation operating member 3).

In FIGS. 8 and 9, 4 is a cover. The cover 4 has a circular through hole 4 at the center of the cylindrical portion 40.
5 is provided. The columnar portion 40 of the cover 4 is watertightly fitted between the collar portions 30 of the rotary operation member 3, and one end of the columnar portion 40 of the cover 4 is attached to the motor drive mechanism 1.
It is watertightly fitted and attached to 03 through an O-ring or the like.

In FIGS. 8 and 9, 103 is a motor drive mechanism arranged in the lamp housing 10. The motor drive mechanism 103 includes a case 105.
And a motor (not shown) built in the case 105
A worm (not shown) attached to the rotating shaft of the motor, and a worm wheel 106 rotatably supported in the case 105 and meshing with the worm. A screw hole 10 is formed at the center of the worm wheel 106.
7 is provided, and the screw shaft portion 22 of the advancing / retreating member 2 is screwed into the screw hole 107 to support the advancing / retreating member 2 so that the advancing / retreating member 2 can advance and retract. When the worm wheel 106 rotates, the advancing / retreating member 2 advances / retreats. Reference numeral 108 in the drawing denotes an output gear coaxial with the worm wheel 106. The output gear 64 meshes with a sensor gear (not shown) and is connected to a sensor mechanism (not shown) via the sensor gear. ing. This sensor mechanism detects the tilt angle of the movable reflector 13 through the rotation of the sensor gear.

This optical axis adjusting device for a vehicle headlamp has the above-mentioned structure, and its operation will be described below. First, the rotation operation member 3 is rotated. Then, the rotational force of the rotation operating member 3 causes the engaging groove 31 and the engaging shaft portion 2 to rotate.
1 is transmitted to the advancing / retreating member 2 through which the worm wheel 106 does not rotate due to the locking action of the worm, motor, etc.
The movable reflector 13 is rotated in the vertical direction, and the movable reflector 13 is rotated in the vertical direction. When the motor of the motor drive mechanism 103 is driven, the worm wheel 106 rotates via the worm, and the rotational force of the worm wheel 106 is transmitted to the advancing / retreating member 2. At this time, the rotational torque of the rotation operating member 3 is changed. Worm wheel 106
Since the rotation operation member 3 does not rotate because the rotation torque is larger than the rotation torque, the advancing / retreating member 2 advances / retreats without rotating with respect to the rotation operating member 3, and accordingly the movable reflector 13 moves.
Rotates up and down.

FIG. 10 and FIG. 11 show a vehicle headlamp for performing an optical axis adjustment operation from a direction substantially perpendicular to the rotation axis direction OO of the rotary operation member 3, for example, a reflector movable type vehicle. An example of an optical axis adjusting device for a headlight for a vehicle will be described. In the drawings, the same symbols as those in FIGS. 7 to 9 indicate the same components.

In FIGS. 10 and 11, reference numeral 300 denotes a rotating member. The rotating member 300 is mounted on the lamp housing 10 via the motor drive mechanism 103 by the cover 4.
Rotatably, and the moving direction of the moving member 2 (rotating member 30
It is arranged so as not to move in the direction 0 of the rotation axis OO). The rotating member 300 and the advancing / retreating member 2 are engaged with each other such that they cannot rotate and are movable in the advancing / retreating direction of the advancing / retreating member 2 (rotational axis direction OO of the rotating member 300).

In FIGS. 10 and 11, reference numeral 5 is a rotary operation member. The rotary operation member 5 is the rotary member 30.
It is arranged rotatably on the left side (or on the right side) substantially orthogonal to the 0-axis of rotation OO. One end of the rotation operation member 5 is connected to the rotation member 300 via the conversion mechanism 50. At the other end of this rotary operation member 5, a hexagonal head 51
To provide.

This optical axis adjusting device for a vehicle headlamp has the above-mentioned structure, and its operation will be described below. First, the hexagonal head 51 of the rotary operation member 5 is rotated. Then, the rotational force of the rotary operation member 5 is converted into the conversion mechanism 5.
0 is transmitted to the rotating member 300, and further transmitted to the advancing / retreating member 2 via the rotating member 300. At this time, the worm wheel of the motor drive mechanism 103 does not rotate due to the locking action of the worm, the motor, etc. The member 2 moves forward and backward while rotating, and accordingly, the movable reflector 13 rotates in the vertical direction. Further, when the motor of the motor drive mechanism 103 is driven, the worm wheel rotates via the worm, and the rotational force of the worm wheel is transmitted to the advancing / retreating member 2. At this time, the rotating member 300
Since the rotation torque of the rotation operating member 5 is larger than the rotation torque of the worm wheel, the rotation member 300 and the rotation operating member 5 do not rotate. Therefore, the advancing / retreating member 2 advances and retracts without rotating, and the movable reflector accordingly. 13 rotates in the vertical direction.

[0014]

However, in the above-described conventional optical axis adjusting device for a vehicle headlamp, the lamp is in the forward / backward direction of the forward / backward member 2 (rotational axis direction OO of the rotary operation member 3). However, there is a problem that the optical axis adjustment work can be performed only from the rear side or only from the direction orthogonal to the advancing / retreating direction of the advancing / retreating member 2 (rotational axis direction OO of the rotating member 300).

An object of the present invention is to move the advancing / retreating member from the advancing / retreating direction (rotating shaft of the rotary operating member) and from the direction orthogonal to the advancing / retreating member (rotating shaft of the rotating operating member).
An object of the present invention is to provide an optical axis adjusting device for a vehicle headlamp, which is excellent in workability of adjusting the optical axis by performing the operation of adjusting the optical axis.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention operates a rotary operation member on the other end side of the rotary operation member from a direction intersecting a rotation axis of the rotary operation member. Is provided with a meshing tooth portion for meshing with the tool, and an operating portion for rotating the rotation operating member in the direction of the rotation axis of the rotation operating member.

Further, the present invention is characterized in that the holder is provided with a guide portion for guiding the tool from a direction intersecting the rotation axis of the rotation operation member.

[0018]

According to the present invention, with the above construction, the optical axis adjustment work can be performed from the rotation axis of the rotation operation member and from the direction orthogonal to the rotation axis of the rotation operation member. Workability is improved.

Further, according to the present invention, since the tool is guided by the guide portion of the holder from the direction intersecting with the rotation axis of the rotary operation member, even when the tool is used, the meshing tooth portion of the tool and the rotary operation member is formed. Can be surely engaged with each other, the optical axis adjustment work can be surely performed, and the workability of the optical axis adjustment is improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical axis adjusting device for a vehicle headlamp according to the present invention will be described below with reference to FIGS. This example describes an optical axis adjusting device of a reflector movable type automotive headlamp. In the figure, the same reference numerals as those in FIGS. 7 to 11 indicate the same components.

In FIGS. 1 to 5, reference numeral 6 is a rotary operation member. The rotation operating member 6 is made of synthetic resin such as polyamide. A columnar shaft portion 60 and a flange portion 61 are provided on one end side of the rotation operation member 6.
On the other end side of the rotation operating member 6, a meshing tooth portion 63 with which a tool 62 for rotating the rotation operating member 6 from a direction intersecting the rotation axis OO of the rotation operating member 6 meshes, and the rotation operating member 6 Hexagonal head 6 as an operating portion for rotating the rotary operation member 6 from the rear of the lamp in the direction of the rotation axis of the lamp.
4 and 4 are integrally provided. The rotation operation member 6
In addition, a support hole 65 is provided from one end surface side to the other end side so that the engagement shaft 21 on the other end side of the advancing / retreating member 2 is supported so as not to rotate and movable in the advancing / retreating direction of the advancing / retreating member 2. The support hole 65 also has an effect of preventing sink marks of the rotary operation member 6 made of synthetic resin. This rotation operating member 6 is arranged by a holder 7 described later so as to be rotatable on the lamp housing 10 via a motor drive mechanism 103 and immovable in the advancing / retreating direction of the advancing / retreating member 2 (rotational axis OO of the rotating operation member 6). To do. The advancing / retreating member 2 is inserted into the support hole 65 of the rotation operating member 6.
The engaging shaft 21 of is engaged rotatably and reciprocally.

In FIGS. 1, 2, and 6, reference numeral 7 is a holder. The holder 7 is made of, for example, a synthetic resin, and has a guide portion 70, a small-diameter through hole 72, and a medium-diameter through hole 7.
3 and a through hole 74 having a large diameter, which are connected to each other, and a mounting flange 75.
5 is provided with a groove 76 for mounting the rotation operation member 6. The groove 76 serves as a guide when the rotation operating member 6 is attached to the holder 7, and the rotation operating member 6 is attached to the holder 7.
It also has the effect that it can be easily and surely installed. The guide portion 70 has a tubular shape, and the axial direction of the guide portion 70 is substantially orthogonal to the axial direction of the through holes 72, 73, and 74, that is, the rotation axis OO of the rotation operation member 6.

The holder 7 is attached to the rotary operation member 6 and O.
The ring is mounted through the groove 76. That is, the shaft portion 60 between the collar portion 61 and the meshing tooth portion 63 of the rotation operating member 6 is provided in the small diameter through hole 72, and the flange portion 61 of the rotation operating member 6 is provided in the medium diameter through hole 73. The flange portion 61 of the rotation operating member 6 is provided in the through hole 74.
The shaft portion 60 and the O-ring on the one end side are mounted rotatably and immovably in the axial direction OO of the rotary operation member 6. The cylinder portion 71 and the mounting flange portion 75 corresponding to the large diameter through hole 74 of the holder 7 are attached to the motor drive mechanism 1
No. 03 case 105 is watertightly fitted and attached with a screw or the like. As a result, the rotation operating member 6 can be rotated by the holder 7 to the lamp housing 10 via the motor drive mechanism 103 and cannot be moved in the advancing / retreating direction of the advancing / retreating member 2 (the rotation axis OO of the rotating operation member 6). Will be placed in.

The optical axis adjusting device for a vehicle headlamp according to the present invention in this embodiment is constructed as described above, and its operation will be described below. First, as shown in FIG. 2, a tool 62 such as a cross screwdriver is used to move the retractable member 2
Is inserted into the guide portion 70 of the holder 7 which is substantially orthogonal to the forward / backward direction (rotational axis OO of the rotation operation member 6),
The rotation operating member 6 is meshed with the meshing tooth portion 63. When the tool 62 is rotated, the rotary operation member 6 is rotated, and the rotational force of the rotary operation member 6 is applied to the support hole 65 of the rotary operation member 6.
Is transmitted to the advancing / retreating member 2 through the engaging shaft portion 21 of the advancing / retreating member 2. At this time, the worm wheel 106 of the motor drive mechanism 103 does not rotate due to the locking action of the worm or the motor, so that the advancing / retreating member 2 rotates. While moving forward and backward, the movable reflector 13 rotates in the vertical direction accordingly.

Next, the hexagonal head 64 of the rotary operation member 6 is rotated from the rear of the lamp in the axial direction OO of the rotary operation member 6. Then, the rotational force of the rotating operation member 6 is transmitted to the advancing / retreating member 2 via the support hole 65 of the rotating operation member 6 and the engaging shaft portion 21 of the advancing / retreating member 2, and at this time, the worm wheel 106 of the motor drive mechanism 103 Since it does not rotate due to the locking action of the worm, motor, etc., the advancing / retreating member 2 advances and retracts while rotating, and the movable reflector 13 accordingly.
Rotates up and down.

When the motor of the motor drive mechanism 103 is driven, the worm wheel 10 passes through the worm.
6 rotates, and the rotational force of the worm wheel 106 is transmitted to the advancing / retreating member 2. At this time, since the rotational torque of the rotary operating member 6 is larger than the rotational torque of the worm wheel 106, the rotational operating member 6 rotates. Therefore, the advancing / retreating member 2 advances and retracts without rotating, and the movable reflector 13 rotates in the vertical direction accordingly.

As described above, in this embodiment, by rotating the hexagonal head 64 of the rotating operation member 6 from the rear of the lamp in the rotation axis direction OO of the rotating operation member 6, the rotating operation is performed again. Since the optical axis adjustment work can be performed by the tool 62 from a direction substantially orthogonal to the rotation axis direction O-O of the member 6, the workability of the optical axis adjustment is improved.

Further, in this embodiment, since the tool 62 is guided by the guide portion 70 of the holder 7 from a direction substantially orthogonal to the rotation axis direction OO of the rotary operation member 6,
Even when the tool 62 is used, the tool 62 and the meshing tooth portion 63 of the rotary operation member 6 can be reliably meshed with each other,
The optical axis adjustment work can be reliably performed, and the workability of the optical axis adjustment is improved.

In the above embodiment, the example in which the motor drive mechanism 106 is used has been described, but the present invention can also be applied to a case in which the motor drive mechanism 103 is not used. In this case, the intermediate screw shaft portion 22 of the advancing / retreating member 2 is rotatably and movably supported on the lamp housing 10 or the like, and the advancing / retreating member 2 is rotated and advanced only by rotating the rotating operation member 3 to move the movable reflector 1.
3 is rotated.

The optical axis adjusting device of the present invention can also be applied to an automobile headlamp of a movable lamp unit type. In the case of the movable lamp unit type, the mounting body is the vehicle body, and the body to be adjusted is the lamp unit.

[0031]

As described above, the optical axis adjusting device for a vehicle headlamp according to the present invention is excellent in workability for adjusting the optical axis.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an optical axis adjusting device for a vehicle headlamp according to the present invention, in a state of being installed in a motor drive mechanism.

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is a rear view of a rotary operation member used in the optical axis adjusting device for a vehicle headlamp of the present invention.

FIG. 4 is a side view in which the same is partly cut away.

5 is a view on arrow V in FIG.

6A is a rear view of a holder used in the optical axis adjusting device for a vehicle headlamp of the present invention, FIG. 6B is a sectional view taken along line BB in FIG. 6A, and FIG. 6 is a sectional view taken along line CC in FIG.

FIG. 7 is a front view of a vehicle headlamp equipped with a conventional optical axis adjusting device.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a cross-sectional view of a state in which the motor drive mechanism is equipped.

FIG. 10 is a side view showing another conventional optical axis adjusting device mounted on a motor drive mechanism.

11 is a view on arrow XI in FIG.

[Explanation of symbols]

1 ... Automotive headlight, 10 ... Lamp housing, 11 ...
Front lens, 12 ... Lamp room, 13 ... Movable reflector, 14
... Pivot mechanism, 15 ... Light source valves, 16 and 17 ... Optical axis adjusting device, 103 ... Motor drive mechanism, 2 ... Advancement / retraction member, 6 ... Rotation operation member, 60 ... Shaft part, 61 ... Collar part, 62
... Tool, 63 ... Interlocking tooth portion, 64 ... Hexagonal head portion, 65 ... Support hole, 7 ... Holder, 70 ... Guide portion, 71 ... Cylindrical portion, 75 ...
Mounting flange, 76 ... Groove.

Claims (10)

[Claims] 1. An adjustable body is tiltably supported by a mounting body,
An advancing / retreating member is movably arranged on the mounting body, one end side of the advancing / retreating member is supported by the body to be adjusted, and a rotation operation member is rotatably mounted on the mounting body by a holder and moved in the advancing / retreating direction of the advancing / retreating member. Arranged so as not to be able to rotate, and one end side of the rotation operation member and the other end side of the advancing / retreating member are supported so as not to be rotatable relative to each other and movable in the advancing / retreating direction of the advancing / retreating member.
By rotating the rotating operation member, the advancing / retreating member advances / retreats with respect to the mounting body, and the adjusted body tilts with respect to the housing to adjust the optical axis. In the optical axis adjusting device, the rotation operating member has, on the other end side, a meshing tooth portion with which a tool for rotationally operating the rotation operating member meshes in a direction intersecting with the rotation axis of the rotation operating member, and the rotation operating member. An optical axis adjusting device for a vehicle headlamp, comprising: an operating section for rotationally operating the rotary operating member from a rotational axis direction. 2. The holder is provided with a guide portion for guiding a tool for rotating and operating the rotation operating member in a direction intersecting with a rotation axis of the rotation operating member. An optical axis adjusting device for a vehicle headlamp according to. 3. The rotation operating member is provided with a support hole from the one end side to the other end side, the other end side of the advancing / retreating member being non-rotatably supported so as to be movable in the advancing / retreating direction of the advancing / retreating member. The optical axis adjusting device for a vehicle headlamp according to claim 1, wherein: 4. The automobile headlight according to claim 1, wherein the reflector is of a movable type, the mounting body is a lamp housing, and the body to be adjusted is a reflector. Axis optical axis adjustment device for automobiles. 5. The vehicle headlamp according to claim 1, wherein the lamp unit is a movable type, the mounting body is a vehicle body, and the body to be adjusted is a lamp unit. An optical axis adjusting device for a vehicle headlight as described above. 6. A body to be adjusted is tiltably supported by a mounting body,
An advancing / retreating member is movably arranged on the mounting body, one end side of the advancing / retreating member is supported by the body to be adjusted, and a rotation operation member is rotatably mounted on the mounting body by a holder and moved in the advancing / retreating direction of the advancing / retreating member. Arranged so as not to be able to rotate, and one end side of the rotation operation member and the other end side of the advancing / retreating member are supported so as not to be rotatable relative to each other and movable in the advancing / retreating direction of the advancing / retreating member.
On the other end side of the rotation operating member, a meshing tooth portion for engaging a tool for rotating the rotation operating member from a direction intersecting the rotation axis of the rotation operating member is provided, and the tool is meshed with the meshing tooth portion. An automobile in which the advancing / retreating member advances and retreats with respect to the mounting body and the adjustment target body tilts with respect to the housing to adjust the optical axis by rotationally operating the rotation operation member by operating the tool. In the optical axis adjusting device for a vehicle headlamp, the holder is provided with a guide portion that guides a tool from a direction intersecting a rotation axis of the rotation operation member. Optical axis adjustment device. 7. The engagement portion for rotating and operating the rotation operating member in the rotation axis direction of the rotation operating member is provided on the other end side of the rotation operating member. 6. The optical axis adjusting device for a vehicle headlight according to item 6. 8. The rotation operating member is provided with a support hole from the one end side to the other end side so that the other end side of the advancing / retreating member is non-rotatably supported and movable in the advancing / retreating direction of the advancing / retreating member. The optical axis adjusting device for a vehicle headlamp according to claim 6, characterized in that. 9. The vehicle headlamp according to claim 6, wherein the reflector is a movable type, the mounting body is a lamp housing, and the adjusted body is a reflector. Axis optical axis adjustment device for automobiles. 10. The vehicle headlamp according to claim 6, wherein the lamp unit is a movable type, the mounting body is a vehicle body, and the body to be adjusted is a lamp unit. An optical axis adjusting device for a vehicle headlight as described above.