JPH0682701U - Optical axis adjustment device for automobile headlights - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to have an excellent waterproof effect. [Structure] A first support for supporting three sides of both end surfaces 33 and 34 and a peripheral side surface 35 of a collar portion 30 provided at one end of a rotary operation member 3.
The support parts 104 and 43 and 44 are connected to the lamp housing 10.
And a second support portion 46 provided on the cover 4 and supporting the peripheral side surface of the other end of the rotary operation member 3 on the cover 4, and between the lamp housing 10 and the rotary operation member 3. An O-ring 5 is interposed inside the lamp housing 10 from the first support portion 104. As a result,
Since the first support portions 104, 43, and 44 support the flange portion 30 of the rotation operation member 3 from three directions, and the second support portion 46 supports the other end of the rotation operation member 3, the rotation operation member 3 is removed. The O-ring 5 can be securely supported without any damage, and therefore the watertightness of the O-ring 5 can be secured.
As it has a heavy waterproof structure, it is highly waterproof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optical axis adjusting device for a vehicle headlight of a reflector movable type, for example, and more particularly to an optical axis adjusting device for a vehicle headlamp having excellent waterproofness.

[0002]

[Prior art]

 An example of an optical axis adjusting device for a vehicle headlight of this type is described in JP-A-62-241201. In such a vehicle headlight, a front lens is generally arranged in a front opening of a lamp housing, and a lamp chamber is formed by the front lens and the lamp housing. A movable reflector as a member to be adjusted is arranged 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 to the front lens side 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 arranged in the lamp chamber. An optical axis adjusting device for vertical direction and an optical axis adjusting device for horizontal direction are provided on the lamp housing and the movable reflector. Operate the optical axis adjusting device for the vertical direction or the optical axis adjusting device for the horizontal direction to rotate the movable reflector (including the light source bulb) vertically or horizontally with respect to the lamp housing. The optical axis is adjusted. In the above-mentioned optical axis adjusting device, one end side of the advancing / retreating member is supported by a reflector that is tiltably supported inside the lamp housing, and the advancing / retreating member is disposed inside the lamp housing so that the advancing / retreating member can move forward and backward. On the other end side, a rotation operating member is supported so that it cannot rotate relative to each other and is movable in the advancing and retracting direction of the advancing and retracting member, and the rotating operating member is rotatable to the outside of the lamp housing and the advancing and retracting member moves forward and backward. It is arranged so that it cannot move in any direction. When the rotary operation member is rotationally operated, the rotational force of the rotary operation member is transmitted to the advancing / retreating member, the advancing / retreating member advances / retreats, and the movable reflector rotates accordingly. Since such an optical axis adjusting device moves the advancing / retreating member forward / backward through the rotary operation member, the seal between the rotary operation member and the lamp housing should be taken into consideration if the sealing property against rotation of the rotary operation member is taken into consideration. Is enough. That is, the sealing property is better than that of the rotation advancing / retreating operation member that rotates and advances / retreats with respect to the lamp housing.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional optical axis adjusting device for a vehicle headlamp, an O-ring is interposed between the flange portion provided on the rotary operation member and the lamp housing to prevent water from entering the lamp housing. It has a waterproof structure.

An object of the present invention is to provide an optical axis adjusting device for a vehicle headlamp, which is further excellent in waterproofness.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention attaches a cover to the lamp housing by projecting the other end of the rotary operation member to the outside and covering the other part of the rotary operation member. The lamp housing and the cover are provided with a first support portion that supports the peripheral side surface and both end surfaces on three sides, while the second support portion that supports the peripheral side surface of the other end of the rotation operation member is provided on the cover. An O-ring is interposed between the lamp housing and the rotary operation member and inside the lamp housing with respect to the first support portion.

[0006]

[Action]

 The present invention has a double waterproof structure including the cover and the O-ring with the above configuration, and thus is excellent in waterproof property. In particular, the first supporting portion of the lamp housing and the cover supports the flange portion at one end of the rotation operating member from three directions, and the second supporting portion of the cover supports the other end of the rotation operating member. The rotation operation member can be firmly supported without rattling. As a result, the watertightness of the O-ring between the lamp housing and the rotary operation member can be ensured.

[0007]

【Example】

 Hereinafter, an embodiment of an optical axis adjusting device for a vehicle headlamp according to the present invention will be described with reference to the accompanying drawings. In FIG. 2, hatching is omitted for convenience of drawing. In the figure, reference numeral 1 is a vehicle headlamp equipped with the optical axis adjusting device of the present invention. 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, and the movable reflector 13 is rotatably attached to the lamp housing 10 by a pivot bearing mechanism 14. On the front surface 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 reflection 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 an optical axis adjusting device 16 for vertical direction and an optical axis adjusting device 17 for horizontal direction. The movable reflector 13 (including the light source bulb 15) is moved up and down with respect to the lamp housing 10 by operating the optical axis adjusting device 16 for upward and downward directions or the optical axis adjusting device 17 for left and right directions. The optical axis is adjusted by rotating it in the horizontal direction or in the horizontal direction.

Next, the above-mentioned vertical optical axis adjusting device 16 will be described. On the back surface of the movable reflector 13, a mounting portion 130 is integrally provided at a position where the optical axis adjusting device 16 for the vertical direction is mounted, and the receiving portion 132 having a spherical concave surface 131 is mounted on the mounting portion 130. On the other hand, for example, a circular boss portion 100 is integrally provided at a portion of the lamp housing 10 where the vertical optical axis adjusting device 16 is mounted, and a circular through hole 101 is provided at the center of the boss portion 100. At the outer end of the boss 100, an O-ring step 102 is provided, for example, in a circular shape on the inner peripheral surface side of the through hole 101, and the step 102 at the outer end of the boss 100 is provided. The first support portion 104 is provided outside the. Further, for example, a ring-shaped mounting portion 103 is integrally projected on the outer surface of the lamp housing 10 and outside the boss portion 100. A mounting hole 105 is provided in the mounting portion 103 from the outer surface of the lamp housing 10.

In the figure, reference numeral 2 is an advancing / retreating member. The advancing / retreating member 2 has, for example, a cylindrical shape, and includes a spherical 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 spherical portion 20 of the advancing / retreating member 2 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 6 described later. That is, the advancing / retreating member 2 is disposed inside the lamp housing 10 so as to be able to advance / retreat.

In the figure, 3 is a rotary operation member. The rotation operating member 3 has, for example, a columnar shape, and a circular collar portion 30 is integrally provided on the outer peripheral surface on one end side 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. A hexagonal head portion 32 with which a tool (not shown) for rotating operation is engaged is integrally provided at the other end of the rotating operation member 3. The engaging shaft portion 21 at the other end of the advancing / retreating member 2 is engaged with the engaging hole 31 of the rotation operating member 3 so that the advancing / retreating member 2 and the rotation operating member 3 cannot rotate relative to each other. Mutually movably supporting the advancing / retreating member 2 in the advancing / retreating direction, and rotating the operating member 3 to the outside of the lamp housing 10 via a cover 4 described later so as to be rotatable and moving in the advancing / retreating direction of the advancing / retreating member 2. Place it impossible.

In the figure, 4 is 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 watertightly covering the boss portion 100 is integrally provided on one end side of the columnar portion 40, and a second watertight cover for the mounting portion 103 is also provided on the outer side of the first cover portion 41. The cover portion 42 is integrally provided, and the through hole 47 is provided in the second cover portion 42 so as to correspond to the mounting hole 105. Further, at one end of the cylindrical portion 40, first support portions 43 and 44 are provided on the inner peripheral surface of the through hole 45 via a step portion. A second support portion 46 is provided on the inner peripheral surface of the through hole 45 at the other end of the columnar portion 40.

Thus, the O-ring 5 is interposed between the inner peripheral surface of the step portion 102 of the lamp housing 10 and the outer peripheral surface of one end of the rotary operation member 3, and the boss portion 100 and the mounting portion 103 of the lamp housing 10 are provided. First, the first cover portion 41 and the second cover portion 42 of the cover 4 are covered in a watertight manner. In addition, both end surfaces 33 and 34 and the peripheral side surface 35 of the peripheral portion of the collar portion 30 of the rotation operation member 3, the first support portion 104 of the lamp housing 10 and the first support portions 43 and 44 of the cover 4, Abut each. Further, the second support portion 46 of the cover portion 4 is watertightly fitted on the other end portion of the rotation operation member 3. Then, the hexagonal head portion 32 on the other end side of the rotary operation portion 3 is projected outward and the other portion is covered with the cover 4. The cover 4 is attached to the lamp housing 10 with the screw 50. As a result, the three end surfaces 33 and 34 and the peripheral side surface 35 of the peripheral edge portion of the collar portion 30 at one end of the rotary operation member 3 are provided on the first support portion 104 of the lamp housing 10 and the first support portion of the cover 4. The rotation operation member 3 is supported by the portions 43 and 44, and the other end of the rotation operation member 3 is supported by the second support portion 46 of the cover 4 between the lamp housing 10 and the rotation operation member 3. The O-ring 5 is located inside the lamp housing 10 with respect to the first support portions 104, 30 and 43 and 44.

In the figure, 6 is a motor drive mechanism arranged inside the lamp housing 10. The motor drive mechanism 6 supports a case 60, a motor 61 built in the case 60, a worm 62 attached to a rotation shaft of the motor 61, and a rotatably supported front side (mirror 11 side), and A worm wheel 63 meshing with the worm 62, an output gear 64 coaxial with the worm wheel 63, a sensor gear (helical gear) 65 meshing with the output gear 64, and a sensor mechanism 66 attached to the sensor gear 65. Consists of. The worm wheel 63 and the output gear 64 have an integrated structure, and a screw hole 67 is provided at the center thereof. The screw shaft portion 22 of the advancing / retreating member 2 is screwed into the screw hole 67 so that the advancing / retreating member 2 can be advanced and retracted. To support. When the worm wheel 63 rotates, the advancing / retreating member 2 advances / retreats. The axial direction of the worm wheel 63 and the axial direction of the sensor gear 65 are substantially orthogonal to each other. The sensor mechanism 66 detects the tilt angle of the movable reflector 13 through the rotation of the sensor gear 65.

The optical axis adjusting device for a vehicle headlamp according to the present invention in this embodiment has the above-mentioned structure, and its operation will be described below. First, the hexagonal head 32 of the rotation operating member 3 is rotated by a tool. Then, the rotational force of the rotation operating member 3 is transmitted to the advancing / retreating member 2 via the engaging groove 31 and the engaging shaft portion 21. At this time, the worm wheel 63 does not rotate due to the locking action of the worm 62 and the motor 61. Therefore, while the advancing / retreating member 2 rotates with respect to the worm wheel 63, the advancing / retreating member 2 advances and retracts, and the movable reflector 13 rotates in the vertical direction accordingly. Further, when the motor drive mechanism motor 61 is driven, the worm wheel 63 rotates via the worm 62, and the rotational force of the worm wheel 63 is transmitted to the advancing / retreating member 2. Is greater than the rotation torque of the worm wheel 62, the rotation operating member 3 does not rotate, so that the advancing / retreating member 2 advances / retreats without rotating with respect to the rotation operating member 3, and accordingly the movable reflector 13 moves up and down. Rotate in the direction.

At this time, the optical axis adjusting device for a vehicle headlamp of the present invention in this embodiment has a double waterproof structure of the cover 4 and the O-ring 5, and is therefore 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 located on one side of the flange portion 30 at one end of the rotary operation member 3 and are on both sides 33 and 34 and the peripheral side surface 35 on three sides. Since the other end of the rotation operating member 3 is supported by the second support portion 46 of the cover 4, the rotation operating member 3 can be firmly 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.

Particularly, in this embodiment, since the rod portion of the rotary operation member 3 and the hexagonal head portion 32 are integrated, it is possible to prevent water from entering between the rod portion and the hexagonal head portion 32. The waterproof property is improved. Moreover, the work of assembling the rod portion and the hexagonal head 32 in a watertight manner is not necessary, and the assembling work is improved. Moreover, since the rod portion and the hexagonal head portion 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 convex portion formed on the rear portion of the lamp housing 10 is small. Moreover, since the motor drive mechanism 6 is housed inside the lamp housing 10, the waterproof structure of the motor drive mechanism 6 is unnecessary. Further, in this embodiment, since the worm 62 and the worm wheel 63 of the motor drive mechanism 6 are positioned forward, as shown in FIG. 2, the action point at the center of the spherical portion 20 of the advancing / retreating member 2 is set. Since the distance between A and the output point B where the worm 62 of the screw shaft portion 22 of the advancing / retreating member 2 and the worm wheel 63 are located is small, the deflection of the movable reflector 13 relative to the advancing / retreating member 2 is small. Become. Further, in this embodiment, since the gear group of the motor drive mechanism 6 is composed of 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 movable reflector 13 can be reduced accordingly. The tilt angle detection accuracy is improved, and the motor drive mechanism 6 can be downsized.

In the above embodiment, the example using the motor drive mechanism 6 has been described, but the present invention can also be applied to the one not using the motor drive mechanism 6. 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 and the movable reflector 13 is moved by rotating the advancing / retreating member 2 only by rotating the rotating operation member 3. It rotates.

[0018]

[Effect of device]

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

[Brief description of drawings]

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

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

FIG. 3 is an enlarged cross-sectional view of an essential part of the present invention.

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

5 is a sectional view taken along line VV 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 bulbs, 16 and 17 ... Optical axis adjusting device, 2 ... Advancement / retraction member, 3 ... Rotation operation member, 30 ...
Collar, 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 ... 2nd spring (2nd elastic member), 6 ... Knob, 7 and 70 and 72 and 73 ... Interposition body.

Claims (1)

[Scope of utility model registration request] 1. A reflector, which is tiltably supported inside a lamp housing, supports one end side of an advancing / retreating member, and arranges the advancing / retreating member inside the lamp housing so that the advancing / retreating member can rotate, and the other end of the advancing / retreating member rotates. The operating members are supported so as not to be rotatable relative to each other and to be movable in the advancing / retreating direction of the advancing / retreating member, and the rotating operating member is rotatable to the outside of the lamp housing and immovable in the advancing / retreating direction of the advancing / retreating member In the optical axis adjusting device for a vehicle headlamp, wherein the cover is attached to the lamp housing, the other end of the rotation operating member is projected outward, and the cover covers the other part, the lamp housing and the A first support portion provided on the cover for supporting the peripheral side surface and both end surfaces of the flange portion provided at one end of the rotation operation member; A second support portion that supports the peripheral side surface at the other end; and an O-ring that is located between the lamp housing and the rotation operating member and that is located inside the lamp housing from the first support portion. An optical axis adjusting device for a vehicle headlamp, characterized by: