JP2582770Y2 - Optical axis adjustment device for automotive headlights - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an optical axis adjusting device for a vehicle headlamp of a movable reflector type, and more particularly to an optical axis adjusting device for a vehicle headlamp excellent in waterproofness.

[0002]

2. Description of the Related Art An optical axis adjusting device for a headlight for an automobile of this type is disclosed, for example, in Japanese Patent Application Laid-Open No. Sho 62-241201. Such an automotive headlamp generally has a front lens disposed in a front opening of a lamp housing,
A lamp chamber is formed by the front lens and the lamp housing. A movable reflector as a member to be adjusted is provided in the lamp chamber, and the movable reflector is rotatably attached to the lamp housing by a pivot bearing mechanism. A reflecting surface for reflecting light from the light source bulb toward the front lens is provided on the front side of the movable reflector. A light source bulb is provided on the reflecting surface side of the movable reflector, and the light source bulb is disposed in the lamp chamber. The lamp housing and the movable reflector are equipped with a vertical optical axis adjusting device and a horizontal optical axis adjusting device. The movable reflector (including the light source bulb) is rotated vertically or horizontally with respect to the lamp housing by operating the optical axis adjusting device for the vertical direction or the optical axis adjusting device for the horizontal direction. Optical axis adjustment.
The above-described optical axis adjusting device supports one end of the advance / retreat member on a reflector that is tiltably supported inside the lamp housing, and arranges the advance / retreat member inside the lamp housing so as to advance / retreat. The rotary operation members are supported on the end side so as not to be rotatable with each other and movably with respect to each other in the advance / retreat direction of the advance / retreat member, and the rotary operation members are rotatable outside the lamp housing and the advance / retreat direction of the advance / retreat member. It is arranged so that it cannot move. When the rotation operation member is rotated, the rotational force of the rotation operation member is transmitted to the advance / retreat member, and the advance / retreat member advances / retreats, and the movable reflector rotates accordingly. Such an optical axis adjustment device moves the reciprocating member forward and backward via the rotating operation member. Therefore, in the seal between the rotating operation member and the lamp housing, it suffices to consider the sealing performance against rotation of the rotating operation member. In other words, the sealing performance is better than the sealing performance of the rotation advance / retreat operating member that rotates and advances / retreats with respect to the lamp housing.

[0003]

However, the above-described conventional optical axis adjusting device for a vehicle headlamp has an O-ring interposed between a flange portion provided on a rotary operation member and a lamp housing, so that the water is adjusted. Has a waterproof structure to prevent intrusion into the lamp housing.

[0004] It is an object of the present invention to provide an optical axis adjusting device for a vehicle headlamp which is more excellent in waterproofness.

[0005]

According to the present invention, in order to achieve the above object, a cover is provided on the lamp housing so that the other end of the rotary operation member projects outward and covers the other portion. A first support portion for supporting the peripheral side surface and both end surfaces of the flange portion provided at one end of the member is provided on the lamp housing and the cover, and a second support portion for supporting the peripheral side surface at the other end of the rotary operation member. Part is provided on the cover,
An O-ring is interposed between the lamp housing and the rotary operation member and inside the lamp housing from the first support.

[0006]

According to the present invention, the waterproof structure is excellent because the above structure forms a double waterproof structure of the cover and the O-ring. In particular, the first supporting portion of the lamp housing and the cover supports the flange at one end of the rotating operation member from three sides, and the second supporting portion of the cover supports the other end of the rotating operation member. The operation member can be firmly supported without play. As a result, the watertightness of the O-ring between the lamp housing and the rotary operation member can be ensured.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for adjusting the optical axis of a vehicle headlamp according to the present invention; In FIG. 2, hatching is omitted for convenience in drawing. In the figure, reference numeral 1 denotes a vehicle headlamp equipped with the optical axis adjusting device of the present invention. In this automotive headlamp 1, a front lens 11 is disposed in a front opening of a lamp housing 10, and a lamp chamber 12 is formed by the front lens 11 and the lamp housing 10. A movable reflector 13 is disposed in the lamp chamber 12, and the movable reflector 13 is rotatably mounted on the lamp housing 10 by a pivot bearing mechanism 14. Light from a light source bulb 15, which will be described later, is applied to the front side of the movable reflector 13 by the front lens 11.
A reflection surface for reflecting light is provided on the side. The movable reflector 1
3, a light source bulb 15 is provided on the reflection surface side, and the light source bulb 15 is disposed in the lamp chamber 12. An optical axis adjusting device 16 for the vertical direction and an optical axis adjusting device 17 for the horizontal direction are provided on the lamp housing 10 and the movable reflector 13.
Equipped with The movable reflector 13 (including the light source bulb 15) is moved vertically or horizontally with respect to the lamp housing 10 by operating the optical axis adjusting device 16 for the vertical direction or the optical axis adjusting device 17 for the horizontal direction. The optical axis is adjusted by rotating in the direction.

Next, the above-described optical axis adjusting device 1 for the vertical direction.
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 adjustment device 16 for the vertical direction is provided, and the mounting portion 130 has a spherical concave surface 1.
A receiving part 132 having 31 is attached. On the other hand, for example, a circular boss portion 100 is integrally provided at a position where the optical axis adjusting device 16 for the vertical direction of the lamp housing 10 is provided, and a circular through hole 101 is provided at the center of the boss portion 100, for example. At the outer end of the boss 100, the through hole 101 is formed.
An O-ring step 102 is provided, for example, in a circular shape on the inner peripheral surface of the boss 100, and the step 102 at the outer end of the boss 100 is provided.
The first support portion 104 is provided outside the device. Further, for example, an annular mounting portion 103 is integrally provided on the outer surface of the lamp housing 10 and outside the boss portion 100 to protrude.
A mounting hole 105 is provided in the mounting portion 103 of the lamp housing 1.
0 is provided from the outer surface.

In FIG. 1, reference numeral 2 denotes an advancing and retreating member. The advance / retreat member 2 has, for example, a cylindrical shape, and has a spherical portion 20 at one end.
And an oval-shaped engaging shaft portion 21 on the other end side, and an intermediate screw shaft portion 22. The spherical portion 20 of the advance / retreat member 2 is rotatably attached to the spherical concave surface 131 of the receiving portion 132. The screw shaft portion 22 of the advance / retreat member 2 is rotatably supported by a motor drive mechanism 6 described later. That is, the reciprocating member 2 is disposed inside the lamp housing 10 so as to be reciprocable.

In the figure, reference numeral 3 denotes a rotation operation member. The rotation operation member 3 has, for example, a cylindrical shape, and has, for example, a circular flange portion 30 integrally protruding from an outer peripheral surface on one end side. A non-circular, for example, rectangular engaging hole 31 is provided between the one end surface of the rotation operation member 3 and the middle of the other end portion. A hexagonal head 32 with which a tool (not shown) for performing a rotating operation is integrally provided at the other end of the rotating operation member 3. An engagement hole 31 of the rotary operation member 3 is provided in an engagement shaft portion 21 at the other end of the advance / retreat member 2.
To support the advance / retreat member 2 and the rotary operation member 3 so that they cannot rotate with each other and can move in the advance / retreat direction of the advance / retreat member 2 with each other. It is arranged outside the cover 10 via a cover 4 which will be described later, so as to be rotatable and immovable in the reciprocating direction of the reciprocating member 2.

In FIG. 1, reference numeral 4 denotes a cover. The cover 4 has a circular through hole 45 at the center of the columnar portion 40.
A first cover portion 41 for integrally covering the boss portion 100 in a water-tight manner is provided on one end side of the cylindrical portion 40, and a second cover for covering the mounting portion 103 in a water-tight manner outside the first cover portion 41. The second cover portion 42 is provided with a through hole 47 corresponding to the mounting hole 105. Further, the first support portions 43 and 44 are provided at one end of the cylindrical portion 40 on the inner peripheral surface of the through hole 45 via a step portion.
Is provided. Further, the other end of the cylindrical portion 40 has the through hole 45.
Is provided with a second support portion 46 on the inner peripheral surface of the.

Thus, the step 1 of the lamp housing 10
An O-ring 5 is interposed between the inner peripheral surface of the cover 02 and the outer peripheral surface of one end of the rotary operation member 3, and the first cover portion 41 of the cover 4 is attached to the boss portion 100 and the mounting portion 103 of the lamp housing 10.
And the second cover part 42 are each covered water-tightly. Further, both end surfaces 3 of the peripheral portion of the flange portion 30 of the rotary operation member 3
3 and 34 and the peripheral side surface 35 and the lamp housing 1
0 of the first support portion 104 and the first support portion 4 of the cover 4
3 and 44 respectively. Further, the second support portion 46 of the cover portion 4 is attached to the other end of the rotation operation member 3.
Is fitted watertight. Then, the hexagonal head 32 at the other end of the rotary operation part 3 is projected outward, and the other part is covered with the cover 4. The cover 4 is attached to the lamp housing 10 with a screw 50. As a result,
The three end surfaces 33 and 34 and the peripheral side surface 35 of the peripheral edge of the flange portion 30 at one end of the rotary operation member 3 are connected to the first support portion 104 of the lamp housing 10 and the first support portions 43 and 44 of the cover 4. The other end of the rotation operation member 3 is supported by a second support portion 46 of the cover 4, and further, between the lamp housing 10 and the rotation operation member 3, The O-ring 5 is interposed between the support portions 104 and 30 and 43 and 44 inside the lamp housing 10.

In the drawing, reference numeral 6 denotes the lamp housing 1.
0 is a motor drive mechanism arranged inside. The motor drive mechanism 6 includes a case 60 and the case 60.
A worm 62 attached to a rotating shaft of the motor 61, a worm wheel 63 rotatably supported on the front side (the mirror 11 side) and meshing with the worm 62, and a worm wheel 63 Output gear 64, a sensor gear (helical gear) 65 meshing with the output gear 64, and the sensor gear 65
And a sensor mechanism 66 attached to the camera. The worm wheel 63 and the output gear 64 form an integral structure, and a screw hole 67 is provided at the center thereof, and the screw shaft portion 22 of the advance / retreat member 2 is screwed into the screw hole 67 so that the advance / retreat member 2 can move forward and backward. To support. When the worm wheel 63 rotates, the advance / retreat member 2 advances and retreats. The axial direction of the worm wheel 63 and the axial direction of the sensor gear 65 are substantially orthogonal. The sensor mechanism 66 detects the tilt angle of the movable reflector 13 through the rotation of the sensor gear 65.

The apparatus for adjusting the optical axis of a headlight for a vehicle according to the present invention in this embodiment has the above-described configuration, and its operation will be described below. First, the hexagonal head 32 of the rotary operation member 3 is rotated with a tool. Then, the rotational force of the rotary operation member 3 is transmitted to the reciprocating member 2 via the engagement groove 31 and the engagement shaft portion 21. At this time, the worm wheel 6
3 does not rotate due to the locking action of the worm 62, the motor 61, etc., the advancing and retreating member 2 advances and retreats while rotating with respect to the worm wheel 63, and the movable reflector 13 rotates in the up and down direction accordingly. When the motor drive mechanism motor 61 is driven, the worm wheel 63 rotates through the worm 62, and the rotational force of the worm wheel 63 is transmitted to the advance / retreat member 2. At this time, the rotational torque of the rotary operation member 3 is reduced. Since the rotation torque of the worm wheel 62 is larger than that of the worm wheel 62, the rotation operation member 3 does not rotate. Therefore, the advance / retreat member 2 advances and retreats without rotating with respect to the rotation operation member 3, and the movable reflector 13 moves in the vertical direction. Rotate.

At this time, the optical axis adjusting device of the vehicle headlight according to the present invention in this embodiment comprises a cover 4 and an O-ring 5.
It has a double waterproof structure, so it is excellent in waterproofness.
In particular, the first support portion 104 of the lamp housing 10 and the first support portions 43 and 44 of the cover 4 are provided from the three end surfaces 33 and 34 and the peripheral side surface 35 of the peripheral portion of the flange portion 30 at one end of the rotary operation member 3. Support and second support portion 46 of cover 4
Thus, the other end of the rotary operation member 3 is supported, so that the rotary operation member 3 can be securely supported without play.
As a result, the watertightness of the O-ring 5 between the lamp housing 10 and the rotary operation member 3 can be ensured.

In particular, in this embodiment, since the rod portion of the rotary operation member 3 and the hexagonal head 32 are integrated,
Water can be prevented from entering between the rod portion and the hexagonal head 32, and the waterproofness is improved. Moreover, the work of assembling the rod portion and the hexagonal head 32 in a watertight manner becomes unnecessary,
The assembling work is improved. In addition, since the rod portion and the hexagonal head 32 are integrated, the number of parts is reduced. Further, in this embodiment, since the motor drive mechanism 6 is incorporated inside the lamp housing 10, the amount of protrusion of the projection formed at the rear of the lamp housing 10 is reduced. Moreover, since the motor drive mechanism 6 is built inside the lamp housing 10, the waterproof structure of the motor drive mechanism 6 is not required. Further, in this embodiment,
Since the positions of the worm 62 and the worm wheel 63 of the motor drive mechanism 6 are located forward, as shown in FIG. 2, the action point A at the center of the spherical portion 20 of the advance / retreat member 2 and the screw of the advance / retreat member 2 Since the distance between the worm 62 of the shaft portion 22 and the output point B where the worm wheel 63 is located is small, the swing of the movable reflector 13 with respect to the advance / retreat member 2 is small. Furthermore, in this embodiment, since the gear group of the motor drive mechanism 6 includes the worm 62, the worm wheel 63, the output gear 64, and the sensor gear 65, the number of gears can be reduced, and the tilt angle of the movable reflector 13 can be reduced accordingly. Is improved, and the motor drive mechanism 6 can be downsized.

In the above-described embodiment, an example in which the motor drive mechanism 6 is used has been described. However, the present invention can also be applied to an apparatus in which the motor drive mechanism 6 is not used. In this case, the intermediate screw shaft portion 22 of the advance / retreat member 2 is rotatably supported on the lamp housing 10 or the like so as to be able to advance / retreat, and the rotational operation member 3 is only operated to rotate the advance / retreat member 2
The movable reflector 13 is rotated by moving forward and backward while rotating.

[0018]

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

[Brief description of the drawings]

FIG. 1 is a front view of an automotive headlamp equipped with the optical axis adjusting device of the present invention, showing one embodiment of an optical axis adjusting device for an automotive headlamp according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged sectional view of a main part of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Headlight for automobiles, 10 ... Lamp housing, 11 ...
Front lens, 12: light room, 13: movable reflector, 14
... Pivot mechanism, 15 ... Light source bulb, 16 and 17 ... Optical axis adjustment device, 2 ... Advancing / retracting member, 3 ... Rotation operating member, 30 ...
Flange, 4 ... cover, 5 ... O-ring, 6 ... Motor drive mechanism. Inclined surface, 5: spring (elastic member), 51: first spring (elastic member), 52: second spring (elastic member), 53: first spring (first elastic member), 5
4 Second spring (second elastic member), 6 Knob, 7 and 70 and 72 and 73 Intermediate.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/20 B60Q 1/06 F21M 7/00

Claims (1)

(57) [Scope of request for utility model registration] An end of an advancing / retreating member is supported by a reflector which is tiltably supported inside a lamp housing, and the advancing / retreating member is disposed inside the lamp housing so as to be able to advance / retreat, and is rotated by the other end of the advancing / retreating member. The operating members are supported so as not to be rotatable with each other and movably with respect to each other in the advancing / retreating direction of the advancing / retreating member. The rotatable operating member is rotatable outside the lamp housing and is not movable in the advancing / retreating direction of the advancing / retreating member. An optical axis adjusting device for an automotive headlamp, wherein the cover is attached to the lamp housing, and the other end of the rotary operation member is protruded outward to cover other portions; and the lamp housing and the lamp housing. A first support portion provided on the cover and supporting three sides of a peripheral side surface and both end surfaces of a flange provided at one end of the rotation operation member; A second support portion for supporting a peripheral side surface at the other end; and an O-ring between the lamp housing and the rotation operating member, the O-ring being interposed between the first support portion and the inside of the lamp housing. An optical axis adjusting device for an automotive headlamp.