JPH11273409A - Headlight for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a non-automatic leveling specification by providing an actuator fitting hole nearer to the leveling axis than to a cylindrical boss forming position, and tilting a reflector around the leveling axis interlockingly with a reciprocating rod. SOLUTION: An automatic leveling actuator 60 has a unit structure protruded with a reciprocating rod 62 forward from an actuator unit case 61, it is fitted to an actuator fitting hole 14 by bayonent coupling, and a reflector 20 is connected to the front section of the reciprocating rod 62 via a ball joint J. The actuator 60 reciprocates the reciprocating rod 62 to move the position of the ball joint J back and forth based on the signal from a center of gravity movement detecting sensor detecting the center of gravity position of an automobile in the longitudinal direction, for example. A light source unit is tilted around the leveling axis to invariably keep the optical axis of a light source constant against the axle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlight for an automobile of an auto-leveling type capable of automatically adjusting the optical axis up and down, and particularly to an auto-leveling type having a lamp body capable of coping with a non-auto leveling type. To a vehicle headlight.

[0002]

2. Description of the Related Art In an automobile headlight of an auto-leveling specification, a reflector having a light source mounted thereon is supported in a lamp body so as to be tiltable around a leveling axis, and an auto-leveling mechanism is interposed between the reflector and the lamp body. Thus, the reflector is automatically tilted around the leveling axis.

In a non-auto-leveling automotive headlamp which does not require an auto-leveling specification, a reflector having a light source mounted thereon is supported in the lamp body so as to be tiltable around a leveling axis, and a light source is disposed between the reflector and the lamp body. In addition, a reflector supporting member, for example, a tilting fulcrum constituting member forming a tilting fulcrum of the reflector is interposed.

[0004]

The above-mentioned conventional headlights of the auto-leveling type and the headlights of the non-auto-leveling type both have the same appearance and form the same light distribution. However, since the members interposed between the reflector and the lamp body are different, the shape of the lamp body (particularly, the shape of the portion where the auto-leveling mechanism or the tilting fulcrum component is attached) cannot be made completely the same, and different metal members are used. A lamp body molded in a mold was used.

[0005] For this reason, the manufacturing cost of the lamp body is high, and this has contributed to the increase in the cost of the automotive headlamp.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the prior art, and has as its object to provide an auto-leveling-type automotive headlamp having a lamp body capable of supporting a non-auto-leveling specification. It is in.

[0007]

In order to achieve the above object, in a vehicle headlight according to claim 1, a reflector having a light source mounted thereon is supported in a lamp body so as to be tiltable around a leveling axis. An actuator mounting hole for mounting an auto-leveling actuator and a reflector tilting fulcrum constituting member for a non-auto-leveling specification are provided at predetermined positions on the lamp body at a predetermined distance on either side of the leveling shaft in the vertical direction. A cylindrical boss for mounting is provided adjacently, and an advance / retreat rod of the auto-leveling actuator attached to the actuator mounting hole extends forward and is connected to the reflector, and is linked to the advance / retreat operation of the advance / retreat rod. A headlamp for an automobile in which a reflector tilts around the leveling axis. Te, the actuator mounting hole than the cylindrical boss forming position was provided in the leveling shaft closer. The reflector tilts around the leveling axis in conjunction with the advance / retreat operation of the advance / retreat rod, and the optical axis of the headlight (reflector) changes in the vertical direction. The inclination of the axle in the front-rear direction is always detected by an axle inclination sensor (for example, a center-of-gravity movement detection sensor), and the actuator is driven based on a detection value of the axle inclination sensor (a center-of-gravity movement detection sensor). . That is, the reciprocating rod of the actuator moves forward and backward, and the reflector is tilted and adjusted so that the optical axis of the headlight (reflector) is always constant with respect to the axle. In addition, since the mounting position of the actuator for auto-leveling (position of the actuator reciprocating rod for tilting the reflector) is closer to the leveling axis than the cylindrical boss forming position, the amount of tilt of the reflector with respect to the amount of reciprocation of the actuator reciprocating rod. Is
This is larger than the case where the actuator is provided at a position farther than the position where the cylindrical boss is formed. Accordingly, the response speed of the auto-leveling is fast, and the reciprocating stroke of the reciprocating rod can be small. In addition, since the actuator mounting hole is closed and the reflector is supported by the reflector tilting fulcrum constituent member arranged on the cylindrical boss, it becomes a non-auto leveling specification, so the auto leveling specification and the non-auto leveling specification The lamp body can be shared. One method of manufacturing lamp bodies with different specifications (one for the auto-leveling specification having an actuator mounting hole and the other for the non-auto-leveling specification without the actuator mounting hole) is as follows. A portion for forming the hole peripheral portion is composed of two types of a split mold for forming an actuator mounting hole or a split mold for non-forming an actuator mounting hole, which is separable from the mold body, and is accommodated in the mold body. Specification by selecting type (auto leveling specification and non-auto leveling specification)
The lamp body can be molded according to the requirements. According to a second aspect of the present invention, in the vehicle headlight according to the first aspect, a pair of left and right aiming screws that are rotatably supported by screw insertion holes provided in the lamp body and extend forward are provided on the lamp body. The pair of left and right nut members screwed to the respective aiming screws are attached to the reflector, and the pair of nut members cooperate to form the leveling shaft, and the pair of nut members is disposed between the reflector and the reciprocating rod. The connecting portion forms a reflector tilting fulcrum of a ball joint structure, and the reflector tilts up and down and left and right in conjunction with rotation of the aiming screw. When the aiming screw is rotated, the nut member advances and retreats along the aiming screw, and the reflector tilts around the reflector-retreat rod connecting portion (reflector tilting fulcrum). Therefore, the rotation of the aiming screw changes the optical axis of the headlight (reflector) in the vertical and horizontal directions. According to a third aspect of the present invention, in the vehicle headlight according to any one of the first to second aspects, the connecting portion between the reflector and the reciprocating rod is provided substantially directly above or substantially directly below one of the pair of left and right nut members. The vertically opposed ball joint and the nut member cooperate to constitute a vertical tilt axis of the reflector. When one of the aiming screws (the aiming screw located away from the vertical tilt axis) is rotated, the reflector tilts around the vertical tilt axis (horizontal tilt), and the optical axis of the headlight (reflector) moves left and right. Change exactly in direction. Claim 4
In the vehicle headlight according to any one of claims 1 to 3, the actuator mounting hole is provided below a leveling shaft when the reflector is viewed from the front. Generally, the turning operation of the aiming screw is
The operation is performed from the rear side of the lamp body. However, since the aiming screw is provided on the upper part of the lamp body, the turning operation is easy. In addition, since the heavy auto leveling actuator is mounted on the lower part of the lamp body, the center of gravity of the headlight is lower than when the auto leveling actuator is mounted on the upper part of the lamp body, and it is mounted on the vehicle body. Good balance in the condition. Claim 5
In the headlight for an automobile according to any one of claims 1 to 4, the actuator for auto-leveling is attached to the actuator mounting hole from the rear side of the lamp body by bayonet engagement, and the actuator unit case is mounted on the lamp. It was configured to project to the rear of the body. By turning the actuator unit case from the rear side of the lamp body to the actuator mounting hole, the bayonet engaging portion can be engaged and released. The actuator unit case is provided on the rear side of the lamp body, and only the reciprocating rod projects inside the lamp body. According to a sixth aspect of the present invention, in the vehicle headlight according to any one of the first to fifth aspects, the actuator for auto-leveling has a configuration in which a stepping motor and a gear mechanism are housed in an actuator unit case. Since the stepping motor can be configured to be thin, the actuator unit case is compact, and the amount of protrusion of the actuator unit case to the rear of the lamp body is small, so that it does not easily interfere with the vehicle body.

[0008]

Next, embodiments of the present invention will be described based on examples.

FIGS. 1 to 11 show a first embodiment of the present invention. FIG. 1 is a front view of an automobile headlamp according to a first embodiment, and FIG. 2 is a longitudinal section of the headlamp. FIG. 3 (a cross-sectional view along the line II-II shown in FIG. 1), FIG. 3 is a vertical cross-sectional view of the headlamp (a cross-sectional view along line III-III shown in FIG. 1),
FIG. 4 is a horizontal sectional view of the headlamp (a line IV-
FIG. 5 is a perspective view showing a bayonet engaging portion between the actuator mounting hole and the actuator unit, FIG. 6 is a diagram showing elastic locking pieces for locking the actuator, and FIG. 7 is an auto-leveling specification. FIG. 8 is a perspective view of a split mold for forming an actuator mounting hole, FIG. 9 is a longitudinal sectional view of a non-auto-leveling-type automobile headlamp, and FIG. 10 is a non-auto-leveling specification of a lamp body. FIG. 11 is a cross-sectional view of a mold for molding a lamp body, and FIG.

[0010] In these figures, reference numeral 10 denotes a container-shaped lamp body made of synthetic resin.
A light source unit U (reflector 20 having bulbs 30A and 30B as light sources inserted therein) is disposed, and a lamp body 1 is provided.
The front lens 18 is attached to the front opening of the lens 0 and is integrated as a headlamp. Reflector 20
Is a parabolic first reflector 20A provided substantially in the upper half and a parabolic second reflector 20 provided in the substantially lower half.
Reflector 20B is formed integrally with the first reflector 20B.
In the bulb insertion hole 21A provided at the rear top of the reflector 20A, a discharge bulb 30A for forming a low beam and a traveling beam is provided, and in the valve insertion hole 21B provided at the rear top of the second reflector 20B. A halogen bulb 30B for forming a traveling beam is inserted. Code 3
Reference numeral 2 denotes a lighting circuit housing unit integrated with the discharge bulb 30A, which houses a lighting circuit for applying a high voltage to the arc tube of the discharge bulb 30A to light the discharge bulb 30A.

The light source unit U (reflector 20)
As shown in FIGS. 3 and 4, a pair of left and right aiming screws 4 that extend horizontally in the front-rear direction through screw insertion holes 12 and 13 formed in the rear wall of the lamp body 10.
And nut members 25 and 26 fitted to brackets 22 and 23 provided on the upper rear surface of the reflector 20 and screwed to aiming screws 40 and 50, respectively.
And an auto-leveling actuator 60 interposed between the lower rear portion of the reflector 20 and the lamp body 10
And an auto-leveling mechanism and an aiming mechanism, which are configured to be capable of tilt adjustment in up, down, left, and right directions.

Auto leveling actuator 60
Is a unit structure in which an advancing / retracting rod 62 projects forward from an actuator unit case 61 containing a stepping motor and a gear mechanism (not shown). The actuator unit case 61 is inserted into an actuator mounting hole 14 formed in the rear wall of the lamp body 10. A reflector 20 is connected via a ball joint J to the front end of an advancing / retracting rod 62 attached by engagement and extending forward through the actuator mounting hole 14. A ball portion 63 is formed at the front end of the reciprocating rod 62, while the bracket 24 protruding from the rear side of the reflector 20 has
The nut member 27 formed with the ball receiving portion 27a is fitted,
A ball joint J, which is a tilting fulcrum of the reflector 20, is constituted by the ball receiving portion 27a and the ball portion 63 of the nut member 27.

The nut members 25 and 26 fitted to the brackets 22 and 23 are made of synthetic resin and have a conventionally known elastic body structure capable of absorbing loads in the vertical and horizontal directions with respect to the brackets 22 and 23. Nut member 25,
Axis indicated at Lx ₁ connecting 26 constitute a leveling shaft in the auto-leveling (tilting center of the reflector 20 by the driving of the actuator 60 is tilted).

That is, based on a signal from a center-of-gravity movement detecting sensor (not shown) for detecting, for example, the center-of-gravity position of the vehicle in the front-rear direction, the arcuator 60 advances and retreats the rod 62 to move the ball joint J. moves the position back and forth, thereby tilting the light source unit U around the leveling shaft Lx _1, it is always an optical axis L of the light source unit U so as to maintain a constant relative axle.

[0015] Thus, the pair constituting the leveling shaft Lx ₁ of the reflector 20 cooperate nut member 2
And 5,26, by an actuator 60 for tilting the reflector 20 in the vertical direction, the reflector 20 automatically is tilted around the leveling shaft Lx ₁ fixed position optical axis L with respect to the axle of the light source units U (the reflector 20) The automatic leveling mechanism is adjusted so that

Further, the arc Ju eta 60 is disposed so as to be orthogonal to the leveling shaft Lx _1, smooth auto leveling is ensured. That is, forward and backward direction of the reciprocating rod 62 of the arc Ju eta 60 is perpendicular to the leveling shaft Lx _1, since the advancing and retracting force of reciprocating rod 62 is converted into a force for tilting efficiently reflector 20, the reflector 20 is leveling shaft Lx ₁ around It can tilt lightly.

On the other hand, aiming screws 40 and 50
Are rotatably supported in screw insertion holes 12 and 13 of the lamp body 10, respectively, and screw members 42 and 52 extending forward have nut members 25 and
Ring gears 45 and 55 into which the teeth of a driver D (see FIG. 3) can be engaged are integrated with the rear end of the screw into which the screw 26 is screwed and which projects rearward of the lamp body 10.

Then, using the driver D, the ring gear 4
When the 5, 55 (aiming screws 40, 50) are respectively rotated, the nut members 25, 26 advance and retreat along the screw thread portions 42, 52, whereby the light source unit U (reflector 20) tilts up, down, left, and right. I do. For example, when the aiming screws 40 and 50 are rotated by substantially the same amount, the horizontal tilt axis Lx passing through the ball joint J is rotated.
(See FIG. 1) Around the light source unit U (reflector 2)
0) is tilted, and when only the aiming screw 50 is rotated without rotating the aiming screw 40, the vertical tilt axis L connecting the nut member 25 and the ball joint J is rotated.
The light source unit U (reflector 20) tilts around y. That is, the aiming screw 40 constitutes a vertical adjusting aiming screw for adjusting the tilt of the optical axis L of the light source unit U in the vertical direction.
Reference numeral 0 denotes an aiming screw for adjusting the optical axis L of the light source unit U in the vertical and horizontal directions.

As described above, the light source is formed by the ball joint J which is the tilting fulcrum of the reflector 20, the aiming screws 40 and 50 for tilting the reflector 20, and the nut members 24 and 25 screwed to the aiming screws 40 and 50. An aiming mechanism for tilting and adjusting the optical axis L of the unit U (reflector 20) in the vertical and horizontal directions is configured.

In general, the turning operation of the aiming screws 40 and 50 is performed by looking into the rear side of the lamp body 10, but in this embodiment, the aiming screws 40 and 50 are positioned at the upper position of the lamp body 10. , The turning operation of the aiming screws 40 and 50 using the driver D is easy.

The auto-leveling actuator 60 is attached to the actuator mounting hole 14 from the rear side of the lamp body 10 by bayonet engagement. The engagement and disengagement of the joint can be performed.

That is, as shown in FIG. 5, the engagement projection 61a on the actuator unit case 61 side engages with the notch 15a and the engagement projection 15b formed on the inner peripheral edge of the actuator mounting hole 14 in a bayonet manner. Since the actuator 60 is attached to the actuator mounting hole 14, the actuator 60 can be easily attached to and detached from the actuator mounting hole 14. Reference numeral 15c denotes an upright wall surrounding the actuator mounting hole 14. Inside the upright wall 15c, an O-ring 15d for sealing the actuator mounting hole 14 to which the actuator 60 is mounted is housed.

In the vicinity of the actuator mounting hole 14 on the back surface of the lamp body 10, as shown in FIG.
Tongue-shaped elastic locking pieces 18a and 18b that lock the actuator unit case 61 that is bayonet-engaged with the actuator mounting hole 14 are formed to extend rearward. The elastic locking pieces 18a and 18b extend perpendicular to each other as viewed from the rear side of the lamp body 10, and move the actuator unit case 61 clockwise (in the direction of the arrow in FIG. 6) as indicated by reference numeral 60 in FIG.
When rotated from the position indicated by A to the position indicated by reference numeral 60B, the engaging protrusions 61a engage with the locking protrusions 15b, and the rectangular protrusions 60a protruding to the side of the case deform the elastic locking pieces 18a. Then, the rectangular projection 60a is sandwiched between the elastic locking pieces 18a and 18b, and the actuator 60 is prevented from rotating with respect to the actuator mounting hole 14.

The actuator unit case 61
Is provided on the rear side of the lamp body 10 so as not to narrow the space between the lamp body 10 and the reflector 20 (so as not to hinder the tilting of the reflector 20). , The amount of protrusion of the actuator unit case 61 toward the rear of the lamp body is not so large. Therefore, the possibility that the actuator unit case 61 interferes with the vehicle body side member is small,
The mounting of the headlamp on the vehicle body is also easy.

In this embodiment, since the heavy auto-leveling actuator 60 is attached to the lower part of the lamp body 10, the center of gravity of the entire headlamp is lowered, and the headlamp is mounted on the vehicle body. The balance is good.

Also, at a position directly below the actuator mounting hole 14 in the lamp body 10, FIGS.
As shown in FIG. 1, a cylindrical boss 16 for arranging a reflector tilting fulcrum component in the case of the non-auto leveling specification is projected forward.
6 is provided with a reflector tilting fulcrum constituent member, and the reflector 20 is supported by this tilting fulcrum constituent member, whereby a non-auto leveling specification is obtained.

That is, as shown in FIG. 9, in a lamp body 10A used for a non-auto leveling type, an actuator mounting hole 14 which is open in the auto leveling type lamp body 10 is closed by a wall 11. In addition, reflector 2 of non-auto leveling specification
0 ′ includes a bracket 28 corresponding to the cylindrical boss 16.
Is protruding. Then, a ball component 70, which is a reflector tilting fulcrum, is attached to the cylindrical boss 16 of the lamp body 10A, and a nut member 29 is fitted to the bracket 28 of the reflector 20 '. By causing the ball portion 72 formed at the front end of the ball portion component member 70 to be supported by the ball portion 29a, the ball joint J ₁ (the ball receiving portion 27a and the ball portion 63), at which the reflector 20 ′ is a tilting fulcrum.
Non-auto leveling specification supported by

In this non-auto leveling specification, an auto leveling mechanism for keeping the optical axis of the light source unit U (reflector 20 ') constant with respect to the axle is not provided, but the light of the light source unit U (reflector 20') is provided. in such a case the shaft is mad, as in the case of auto-leveling specification, by rotating operation of the aiming screw 40, 50 (see FIG. 1) horizontal axis tilting axis Lx 'through the ball joint J _1, the nut member 25 and a vertical tilting axis Ly around connecting the ball joint J ₁ by tilting the light source unit U (the reflector 20 '), the optical axis of the light source unit U can be tilted adjusted vertically and horizontally. In FIG. 9, the reflector 20 ′ is a bracket 2 instead of the bracket 24.
8 has the same structure as the reflector 20 used for the auto-leveling specification, except that the reflector 20 is provided.

Further, a lamp body having a different specification (for an auto-leveling specification having an actuator mounting hole 14) is used.
In order to manufacture the non-auto leveling specification 10A) without the actuator mounting hole 14 and the actuator mounting hole 14 of the lamp body molding die, the portion for forming the peripheral portion of the actuator mounting hole can be separated from the mold body. Consisting of two types, a split mold for hole forming or a split mold for non-forming the actuator mounting hole, and by selecting the split mold to be housed in the mold body, it can be specified (auto-leveling specification and non-auto-leveling specification). Combined lamp body 10,10
A can be molded.

That is, as shown in FIGS. 7 and 10, the mold 80 for molding the lamp body includes the lamp body 10 (10
A) Lower mold 81 for inner molding and lamp body 10
(10A) is constituted by an upper mold 82 for outer molding. The portion of the lower mold 81 where the peripheral portion of the actuator mounting hole is formed is constituted by the split mold 86 for forming the actuator mounting hole or the split mold 88 for non-forming the actuator mounting hole which can be separated from the die body. I have. As shown in FIG. 5, the split mold 86 for forming the actuator mounting hole has a shape in which a notch 15a and a projection 15b can be formed on the inner peripheral edge of the actuator mounting hole 14 (see FIG. 8).
On the other hand, as shown in FIG. 9, the split mold 88 for non-forming the actuator mounting hole has a shape capable of forming the wall 11 for closing the actuator mounting hole 14 (FIG. 11).
Reference).

In order to form the lamp body 10 for the auto-leveling specification, injection molding is performed in such a manner that the divided mold 86 for forming the actuator mounting hole is accommodated in the divided mold accommodating hole 84 of the lower mold 81. The lamp body 10 for leveling specification is molded. On the other hand, to mold the lamp body 10A for the non-auto leveling specification, the lower mold 81 is used.
Then, injection molding is performed in such a manner that the split mold housing hole 84 accommodates the split mold for non-forming the actuator mounting hole, thereby forming the lamp body 10A for non-auto leveling specification.

Further, the forming position of the actuator mounting holes 14 in the lamp body 10 (arrangement position of the reciprocating rod 62 of the actuator 60 for tilting the reflector 20) is provided near the leveling shaft Lx ₁ than cylindrical boss 16 formed position Therefore, the response speed of the auto-leveling is fast, and the reciprocating stroke of the reciprocating rod 62 can be small.

That is, the reciprocating rod 62 is connected to the leveling axis Lx
_{When the} reflector 20 is provided farther than the position where the cylindrical boss 16 is formed, the tilt amount of the reflector 20 with respect to the advance / retreat amount of the advance / retreat rod 62 of the actuator 60 is small.
In order to increase the amount of tilt of the reflector 20, it is necessary to increase the forward / backward stroke of the forward / backward rod 62.
However, in this embodiment, since the reciprocating rod 62 is provided on the leveling shaft Lx ₁ closer, as compared with the case where reciprocating rod 62 is provided on the cylindrical boss 16 formed position beyond, advance and retreat of reciprocating rod 62 Reflector 2
The tilt amount of 0 is large, and even if the amount of advance / retreat of the advance / retreat rod 62 is small, the reflector 20 can be tilted greatly,
Good auto leveling and a thin headlamp are ensured.

FIG. 12 shows a second embodiment of the present invention, and is a horizontal sectional view of an automobile headlamp, which partially corresponds to FIG. 4 of the first embodiment.

In the above-described embodiment, the nut members 25, 2
Leveling shaft Lx ₁ constituted by 6 are orthogonal to the optical axis L of the light source units U (the reflector 20), while the actuator mounting hole 14 is a structure provided right above the cylindrical boss 16 formed position, in this embodiment, not orthogonal to the optical axis L of the leveling shaft Lx ₁ is a light source unit U (the reflector 20), while the actuator mounting hole 14 is in the upper cylindrical boss 16 formed position shifted in the optical axis L side It is characterized in that it is a structure provided at a position.

The aiming screws 40 and 50 and the cylindrical boss 16 are disposed at the same position as in the above-described embodiment and in parallel with the optical axis L of the light source unit U (reflector 20). Rod 62
, As perpendicular to the leveling shaft Lx _1, it is arranged inclined relative to the optical axis L.

[0037] That is, the actuator mounting hole 14 edge region 10a in the vicinity of the cylindrical boss 16 formed position in the rear wall of the lamp body 10 is formed in a vertical plane parallel to the plane including the leveling shaft Lx _1, the actuator mounting hole 14
Reciprocating rod 62 attached to the actuator 60 extends perpendicular to the leveling shaft Lx _1, the reflector 20
The tip ball portion 63 of the advance / retreat rod 62 is supported by the ball receiving portion 27a of the nut member 27 fitted to the nut member 27, and a ball joint J composed of the ball receiving portion 27a and the ball portion 63 is provided directly below the nut member 25. .

Also in the second embodiment, the direction in which the advancing / retracting rod 62 of the actuator 60 is disposed is the leveling axis L.
Since orthogonal to the x _1, which enables lightweight automatic leveling. In the above-described embodiment, a description has been given of a headlamp for an automobile. However, the present invention is not limited to a headlamp, and can be applied to a fog lamp and other headlights for an automobile.

[0039] In the above embodiment, it is disposed a ball joint J beneath the nut member 25, although the vertical tilt shaft Ly is configured so as to be perpendicular to the leveling shaft Lx _1,
Ball joint J is may not be located directly below the nut member 25 (vertical tilting axis Ly may not orthogonal to the leveling shaft Lx _1).

In the above embodiment, the upper side of the reflector 20 is supported by the aiming screws 40 and 50, and the lower side of the reflector 20 is the actuator 60.
Of the reflector 20, the aiming screws 40, 50.
And the upper side of the reflector 20 may be supported by the reciprocating rod 62 of the actuator 60.

The auto-leveling actuator 60 is attached to the actuator mounting hole 14 by bayonet engagement. However, the attachment of the actuator 60 is not limited to bayonet engagement, but may be performed by screwing, uneven lance engagement, or the like. Fixing means may be used.

In the above-described embodiment, the actuator mounting hole is formed by selectively using the actuator mounting hole forming split mold 86 or the actuator mounting hole non-forming split mold 88 which can be separated from the mold body. Both the auto-leveling type lamp body 10 formed with the 14 and the non-auto-leveling type lamp body 10A without the actuator mounting hole 14 can be formed, but the actuator mounting hole 14 is formed. No auto leveling specification for lamp body 10
By forming the actuator mounting hole 14 by post-processing using a cutter or the like, the lamp body for the non-auto leveling specification is formed. Conversely, the actuator mounting hole 14 is formed separately from the lamp body 10 for the auto leveling specification. By closing with, the lamp body for the auto-leveling specification can be used, and the same lamp body can be used for the head lamp of both specifications.

[0043]

As is clear from the above description, according to the automotive headlamp according to the first aspect, the auto-leveling actuator is mounted in the actuator mounting hole, so that the auto-leveling specification is achieved, and the cylindrical boss is provided. Since the reflector tilting fulcrum member is provided in the non-auto-leveling specification, the lamp body can be shared between the auto-leveling specification and the non-auto-leveling specification, and the cost of the headlight can be reduced accordingly. Since the auto-leveling actuator is provided closer to the leveling axis than the cylindrical boss forming position, compared to the case where the actuator is provided beyond the cylindrical boss forming position,
The auto-leveling response speed is fast, and the visibility in front of the driver is improved. Further, since the reciprocating stroke of the reciprocating rod can be small, the front-rear width of the lamp body can be reduced. According to the second aspect, the optical axis of the headlight (reflector) can be automatically adjusted by auto-leveling, and when the optical axis of the headlight (reflector) is out of order, the rotation of the aiming screw is performed. By adjusting the optical axis by the operation, an appropriate light distribution can be formed. According to the third aspect, by rotating the aiming screw, the reflector is accurately tilted in the left-right direction, so that the left-right optical axis adjustment of the headlight (reflector) is facilitated. According to the fourth aspect, since the aiming screw can be easily turned while looking into the rear of the headlight, the optical axis of the headlight (reflector) can be easily adjusted. In addition, since the auto-leveling actuator is attached to the lower part of the lamp body, the position of the center of gravity of the headlight is low, and the balance when mounted on the vehicle body is good. According to the fifth aspect, since the engagement and disengagement of the bayonet engaging portion can be performed by rotating the actuator unit with respect to the actuator mounting hole, it is easy to attach and detach the actuator. According to the sixth aspect, the actuator unit case is thin and compact, and has a small amount of protrusion toward the rear of the lamp body. Therefore, when the headlight is mounted on the vehicle body, the actuator unit case does not easily interfere with the vehicle body, and the work of mounting the headlight is difficult. It will be easier.

[Brief description of the drawings]

FIG. 1 is a front view of an automotive headlamp according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the headlamp (a line II-
Sectional view along II)

FIG. 3 is a vertical sectional view of the headlamp (line III shown in FIG. 1).
Sectional view along -III)

FIG. 4 is a horizontal sectional view of the headlamp (the line IV shown in FIG. 1).
Sectional view along -IV)

FIG. 5 is a perspective view showing a bayonet engaging portion between the actuator mounting hole and the actuator unit.

FIG. 6 is a view showing an elastic locking piece for locking the actuator.

FIG. 7 is a sectional view of a mold for molding a lamp body of an auto-leveling specification.

FIG. 8 is a perspective view of a split mold for forming an actuator mounting hole.

FIG. 9 is a longitudinal sectional view of a non-auto leveling specification automobile headlamp.

FIG. 10 is a sectional view of a lamp body molding die of a non-auto leveling specification.

FIG. 11 is a perspective view of a split mold for non-forming the actuator mounting hole.

FIG. 12 is a horizontal sectional view of an automobile headlamp according to a second embodiment of the present invention.

[Explanation of symbols]

U Light source unit L Optical axis of light source unit (reflector) 10, 10A Lamp body 12, 13 Screw insertion hole 14 Actuator mounting hole 16 Cylindrical boss 18 Front lens 20, 20 'Reflector 25, 26, 27, 29 Nut member 27a , 29a Ball receiving portion 30A Bulb as light source 40, 50 Aiming screw 60 Actuator for auto leveling 61 Actuator unit case 62 Retracting rod 63 Ball portion 70 Ball portion forming member 80 which is a tilting fulcrum constituent member in non-auto leveling specification 80 (81, 82) lamp mold 86 actuator mounting hole ball joint J ₁ reflector tilting fulcrum provided on the connecting portion between the molding split molds 88 actuator mounting hole unformed molding split molds J reflector reciprocating rod for body shaping Ball disposed between formation member joint Lx ₁ leveling shaft Lx, Lx 'vertical tilt shaft of a horizontal tilting axis Ly reflector of the reflector

Claims (6)

[Claims] 1. A reflector having a light source mounted thereon is supported in a lamp body so as to be tiltable around a leveling axis, and a level of a predetermined distance on either side of the leveling axis in a vertical direction of the lamp body is set at an auto-leveling position. An actuator mounting hole for mounting an actuator for mounting, and a cylindrical boss for arranging a reflector tilting fulcrum constituent member in the case of a non-auto leveling specification are provided adjacent to each other, and an automatic mounting attached to the actuator mounting hole is provided. An advancing / retracting rod for a leveling actuator extends forward and is connected to the reflector, and the reflector is tilted around the leveling axis in conjunction with the advancing / retracting operation of the advancing / retracting rod, wherein the actuator mounting hole is provided with the actuator mounting hole. Closer to the leveling axis than the cylindrical boss formation position An automotive headlight, which is provided. 2. A pair of left and right aiming screws, which are rotatably supported by screw insertion holes provided in the lamp body and extend forward, are disposed on the lamp body, and are screwed to the respective aiming screws. A pair of left and right nut members are attached to the reflector, and the pair of nut members cooperate to configure the leveling shaft, and the reflector-retractable rod connecting portion forms a reflector tilting fulcrum of a ball joint structure. The vehicle headlight according to claim 1, wherein the reflector tilts up, down, left, and right in association with rotation of the aiming screw. 3. The reflector / advancing / retracting rod connecting portion is provided substantially directly above or substantially below one of the pair of left and right nut members, and a ball joint and a nut member opposing vertically cooperate to form a reflector of the reflector. The vehicle headlight according to claim 1, wherein the headlight comprises a vertical tilt axis. 4. The vehicle headlight according to claim 1, wherein the actuator mounting hole is provided below the leveling shaft when a reflector is viewed from the front. 5. The actuator according to claim 1, wherein the actuator for auto-leveling is attached to the actuator mounting hole from the rear side of the lamp body by bayonet engagement, and the actuator unit case projects rearward of the lamp body. An automotive headlight according to any of the preceding claims. 6. The automatic leveling actuator according to claim 1, wherein a stepping motor and a gear mechanism are housed in an actuator unit case.
The vehicle headlight according to any one of claims 1 to 5.