JP2668307B2 - Aiming 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 a new aiming adjustment device for a headlight of a vehicle. In detail, an adjusting shaft connected to an aiming adjustment point located near the lower end of the tilting member that defines the irradiation direction, and an operating shaft linked to the adjusting shaft via a gear transmission mechanism, and rotating the operating shaft The aiming adjusting device for the vehicle headlamp in which the adjusting shaft is rotated by the tilting member by the tilting member, in particular, the adjusting shaft extends in a substantially horizontal direction, and the operation shaft extends from the vicinity of the rear end of the adjusting shaft toward the upper front. The present invention relates to an aiming adjustment device for an automotive headlight in which an adjustment shaft and an operation shaft are linked by a gear transmission mechanism having a bevel gear, and an operation is performed by devising a gear transmission mechanism. The link between the rotation output of the shaft and the rotation input of the adjustment shaft can be positioned considerably forward of the intersection of the axes of the operation shaft and the adjustment shaft, thereby reducing the overall size of the headlight device in the front-rear direction. thing Possible, after the adjustment shaft as short as especially the length of the adjustment shaft
Direction space as much as possible and the operation axis
Gear in a limited narrow space in front of the intersection of
It is an object of the present invention to provide a novel vehicle headlamp aiming adjustment device capable of housing a transmission mechanism .

[0002]

2. Description of the Related Art A headlight for an automobile needs to be able to adjust its irradiation direction at any time. For this purpose, a tilting member for defining the irradiation direction, for example, a headlight unit That is, a tilting member such as a headlight unit or a reflector, which is formed by arranging a light source in a lamp space defined by a lamp body and a lens that covers a front opening of the lamp body, is tilted vertically and horizontally with respect to the vehicle body. An aiming adjustment device for freely supporting and tilting the tilting member is provided.

In general, the aiming adjusting device extends in the axial direction with its front end extending substantially horizontally with two adjusting shafts respectively connected to the upper and lower aiming adjusting points and the left and right aiming adjusting points of the tilting member. It is rotatably supported, and an operation shaft for rotating the adjustment shaft is provided. The adjustment shaft and the operation shaft are linked via a gear transmission mechanism behind the headlight main body, and adjustment is performed by rotating the operation shaft. The shaft is rotated to displace the aiming adjustment point in the front-rear direction, whereby the tilting member is tilted.

Further, in such an aiming adjustment device, in order to allow the operation shaft to be operated from the front of the vehicle body, the operation shaft may be provided in a state of being inclined obliquely upward and forward. The operation shaft and the adjustment shaft are linked by engaging a bevel gear fixed to the rear end of the operation shaft and a bevel gear connected to the rear end of the adjustment shaft so as to rotate integrally therewith. Often, so
The link point between the operation axis and the adjustment axis is located near the intersection of the axes of the operation axis and the adjustment axis.

[0005]

By the way, the longer the distance between the aiming adjustment point and the tilting fulcrum, the greater the force acting on the aiming adjustment of the force for turning the operation axis can be increased. Therefore, the upper and lower aiming adjustment points are as low as possible. It is desirable to install it in a position.

However, when the operation axis is inclined as described above, the intersection of the adjustment axis and the operation axis is located rearward as the aiming adjustment point is located at a lower position. For that reason, there is a problem that the dimension in the front-back direction of the entire headlight device, that is, the depth becomes large.

If the diameter of the bevel gear is increased,
The link point between the operation shaft and the adjustment shaft can be located closer to the front. However, if this is done, the bevel gear on the adjustment shaft may be located below the headlamp body and / or depending on the position of the aiming adjustment point. may inadvertently laterally protruding, after all, a problem that in spite of the size of the headlight body size in the vertical direction and / or transverse direction of the entire headlamp apparatus becomes large, bevel gears If the diameter of the
The bevel gear in the narrow space in front of the intersection of
The problem of whether it fits in the poly arises.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an aiming adjusting device for a vehicle headlamp according to the present invention has a tilting member for defining an irradiation direction and a substantially horizontal direction.
And is supported rotatably around the axis and
Aiming adjustment point whose end is located near the lower end of the tilting member
From the adjustment shaft connected to the
To extend diagonally upward and forward toward the periphery of the body
The operation axis arranged in the and the rotation of the operation axis is transmitted to the adjustment axis.
Of a vehicle headlight with a gear transmission mechanism
Adjusting the driven spur gear at the rear end of the adjusting shaft in the adjusting device
It is connected so that it rotates integrally with the shaft, and
Secure the drive bevel gear to the rear end of the
The intermediate bevel gear meshing with the drive bevel gear and on the front side of the intermediate bevel gear
It is located, rotates integrally with the intermediate bevel gear, and
An intermediate spur gear that meshes with the gear is arranged .

[0009]

Accordingly, in the aiming device for a headlamp for an automobile according to the present invention, the lamp body is positioned from the vicinity of the rear end of the adjusting shaft.
The operating shaft extending obliquely forward toward the vicinity of the peripheral portion includes a drive bevel gear fixed thereto, an intermediate bevel gear, an intermediate spur gear located on the front side of the intermediate bevel gear, and a driven spur gear coupled to the adjustment shaft. The adjustment shaft is linked to the adjustment shaft via the gear transmission system, and the intermediate bevel gear and the intermediate spur gear are arranged above the adjustment shaft. The headlamp device can be positioned considerably in front of the intersection of the respective axial cores, so that the dimension in the front-back direction of the entire headlight device, that is, the depth can be reduced. Especially, when the intermediate gear is arranged above the adjustment shaft,
The intermediate gear is divided into a spur gear and a bevel gear,
The spur gear that meshes with the driven spur gear that is connected to
The adjustment shaft is shorter because it is located on the front side.
Only so much space can be secured behind the adjustment shaft.
Become so. The intermediate gear is an intermediate bevel gear and an intermediate spur gear.
Separated into cars, so the diameter of each gear did not need to be increased.
Limited narrow space ahead of the intersection of the operation axis and the adjustment axis.
It can be stored in the room.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the aiming adjusting device for a vehicle headlamp according to the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in the drawings, the present invention is applied to an aiming adjustment device in a headlamp apparatus of a movable reflector type.

In FIG. 1, reference numeral 1 denotes a headlight device.

Reference numeral 2 denotes a main body of the headlight device 1, which includes a lamp body 4 fixed to the vehicle body 3, a lens 5 covering the front opening thereof, and a lamp space 6 defined by the lamp body 4 and the lens 5. And a reflecting mirror 7 that is tiltably arranged inside.

The lamp body 4 has a substantially rectangular front opening 4a which is long in the left-right direction when viewed from the front (the leftward direction in FIG. 1 is the right side, and the rightward direction is the left side). A circular hole 9 is formed in the central portion of the back wall 8 and the portion 10 on the left side including the central portion has a flat shape with the thickness direction facing the front-back direction. As described above, the remaining portion is formed so as to be inclined leftward in the horizontal section and to have a substantially spherical shape in the vertical section.

Further, a lens installation groove 11 which opens forward is formed at the edge of the front opening 4a.

The lamp body 4 as described above is substantially L-shaped and protrudes rearward from the rear surface of the lens mounting groove 11.
The mounting protrusions 12, 12, 12 and the mounting protrusion 13 protruding rearward from the lower right corner of the rear wall 8 (see FIG. 5).
These are fixed to the vehicle body 3 by being screwed to the vehicle body 3.

The lens 5 is composed of a front surface portion 5a and a peripheral wall portion 5b protruding rearward from a peripheral edge portion thereof, and the peripheral wall portion 5b.
Is fixed to the lamp body 4 with its rear end seated in the lens installation groove 11 of the lamp body 4. This allows
The front opening 4a of the lamp body 4 is covered with the lens 5, and the lamp space 6 is defined.

The reflecting mirror 7 is a front opening 4a of the lamp body 4.
It has a substantially smaller opening, most of which is in the shape of a paraboloid of revolution, and its inner surface 7a is a reflecting surface that has been treated to have high light reflectivity. Is supported by the base of the light bulb 14.

The reflecting mirror 7 includes a tilting fulcrum A, a left and right aiming adjustment point B located on the right side thereof,
Arranged in the lamp space 6 in a state of being rotatably supported by the lamp body 4 at three points (see FIG. 1) of the upper and lower aiming adjustment points C which are located directly below the tilt fulcrum A and also serve as leveling adjustment points. Is done.

Reference numeral 15 denotes a tilting fulcrum having the tilting fulcrum A (see FIGS. 1, 4 and 6), and 16 denotes an aiming adjuster having a left and right aiming adjustment B (FIGS. 1, 2 and 5).
Reference numeral 17 denotes a vertical aiming adjustment unit having a vertical aiming adjustment point C (see FIGS. 1 to 4, 6, and 7), 1
Reference numeral 8 denotes a leveling mechanism including the adjustment axis of the aiming adjustment unit 17 as a part of the constituent elements.

The tilting fulcrum 15 is located behind the upper left corner of the reflecting mirror 7. Reference numeral 19 denotes a substantially cylindrical projection which projects rearward from the upper left corner of the back surface 7b of the reflector 7;
Reference numeral 0 denotes a synthetic resin receiver supported at the rear end of the projection 19, and reference numeral 21 denotes the flat portion 10 of the rear wall 8 of the lamp body 4.
Among them, a protruding portion 22 protruding forward at a position facing the protruding portion 19 of the reflecting mirror 7 is a support shaft whose rear end is fixed to the protruding portion 21. A spherical body 22a forming a front end is rotatably fitted in the spherical recess 20a of the receiving body 20. This spherical body 22a is spherical concave portion 2
The position fitted to 0a is the tilt fulcrum A, and the reflecting mirror 7 is supported by the lamp body 4 at the tilt fulcrum A so as to be vertically and horizontally tiltable.

The left and right aiming adjustment section 16 is arranged behind the upper right corner of the reflecting mirror 7. Reference numeral 23 denotes a substantially cylindrical protrusion projecting rearward from the upper right corner of the rear surface 7b of the reflecting mirror 7, 24 denotes a nut made of synthetic resin supported at the rear end of the protrusion 23, and 25 denotes left and right. The aiming adjusting shaft 25 has a front portion 25a formed in a screw shaft shape and screwed into a screw hole 24a of the nut 24, and a rear end portion 25b of the aiming adjusting shaft 25 has a rear wall of the lamp body 4. 8 is rotatably inserted through the support hole 26 formed in the thick-walled portion at the upper right corner, while being prevented from moving in the front-rear direction, and
A driven gear 27 like a bevel gear is fixed to an end protruding rearward from the support hole 26. The aiming adjustment axis 2
The point at which 5 is screwed into the nut 24 is the left / right aiming adjustment point B.

28 is a gear casing fixed to the rear surface of the lamp body 4 so as to cover the driven gear 27, and 29 is an operating shaft for rotating the aiming adjusting shaft 25. The operating shaft 29 is moved upward. It is rotatably supported by the gear casing 28 in a state of being inclined at an angle of about 45 °, and the latter half portion of which is positioned so as to penetrate the gear casing 28, and is fixed to a portion positioned inside the gear casing 28. The spur gear-shaped drive gear 30 is meshed with the driven gear 27.

Therefore, when the operation shaft 29 is turned, the aiming adjustment shaft 25 is rotated, whereby the nut 24 is moved in the front-rear direction, and the left and right aiming adjustment points B are displaced in the same direction.

The upper / lower aiming adjustment unit 17 and the leveling mechanism 18 are arranged behind a position near the lower left corner of the reflecting mirror 7, and share one adjustment axis.

Reference numeral 31 is an adjusting shaft (hereinafter, referred to as "vertical aiming adjusting shaft") for performing vertical aiming adjustment and leveling adjustment, which has a substantially cylindrical shape elongated in the front-rear direction, and its front end portion 31a is screwed. It is formed in a shaft shape, and the rear end 31
b is formed so that the cross section has a substantially oval shape.

Numeral 32 denotes a cylindrical rod support, which is rotatably fitted to a substantially central portion of the vertical aiming adjustment shaft 31 while being prevented from moving in the axial direction. A groove is formed.

Reference numeral 33 denotes a casing of the leveling mechanism 18. The casing 33 is formed into a vertically long rectangular box when viewed from the front-rear direction, and has attached pieces 34 protruding from the lower ends of the upper surface and the left and right side surfaces thereof. 34, 34 and a cylindrical guide portion 35 positioned so as to project forward and backward from the lower end portion of the front wall thereof.
Screws 37, 37, 34 are attached to mounting seat portions 36, 36, ... (Only one is shown in the drawing) provided on the flat portion 10 of the rear wall 8 of the lamp body 4 so as to project rearward. It is fixed by 37 and the front part of the guide part 35 projects into the lamp space 6 through an insertion hole 38 formed in the flat part 10.

Reference numeral 39 denotes a leveling driver housed in the lower portion of the casing 33. The cylindrical portion 40 and the worm wheel portion 41 which are coaxial with each other are integrally formed, and the cylindrical portion 40 is a guide portion of the casing 33. It is supported so as to be rotatable in a state inserted in 35 and in a state where it cannot move in the axial direction. In addition, the hole 4 of the cylindrical portion 40
0a is a screw hole.

The rod support 32 is slidably inserted in the axial direction in a state where rotation in the direction around the axis is disabled in the guide portion 35, and the rear portion of the rod support 32 is a cylindrical member of a leveling drive 39. The vertical aiming adjustment shaft 31 is supported by the casing 33 via the rod support 32 and the leveling drive 39 in a direction extending in the front-rear direction by being screwed into the screw hole 40a of the portion 40.

The rear end portion 3 of the vertical aiming adjustment shaft 31
1b is an insertion hole 33 formed in the rear wall of the casing 33.
It projects rearward through a (see FIG. 6).

A motor 42 and a reduction gear 43 rotated by the motor 42 are housed in the casing 33, and a worm gear 44 formed integrally with the reduction gear 43.
Are engaged with the worm wheel portion 41 of the leveling drive body 39. Therefore, when the motor 42 rotates, the leveling driving body 39 rotates and feeds the rod support 32 in the front-rear direction, which causes the vertical aiming adjustment shaft 31.
Are moved in the same direction.

Reference numeral 45 denotes a substantially cylindrical protrusion protruding rearward from the lower left corner of the rear surface 7b of the reflecting mirror 7, and reference numeral 46 denotes a synthetic resin nut supported on the rear end of the protrusion 45. Yes,
The front end 31a of the vertical aiming adjustment shaft 31 is screwed into the hole 46a of the nut 46. The position where the vertical aiming adjustment shaft 31 is screwed into the nut 46 is the vertical aiming adjustment point C.

Reference numeral 47 denotes a gear case of the vertical aiming adjustment unit 15, which has a vertically long and substantially oval shape when viewed from the front and rear.
7b protrudes downward from the front half, and the upper part 47c protrudes upward and rearward from the rear half of the central part 47b.
Therefore, the shape of the gear case 47 as viewed from the left-right direction is substantially a crank shape. 48, 48, gear case 4
7 are attached pieces protruding from both left and right sides of 7.

The gear case 47 has a front surface overlapping the rear surface of the casing 33 of the leveling mechanism 18.
It is fixed to the casing 33 by 9 and 49.

Reference numeral 50 denotes a spur gear (hereinafter referred to as "driven spur gear") housed in the lower portion 47a of the gear case 47, and a cylindrical boss 51 projecting forward and backward from the central portion thereof is integrally formed. The positions of both sides of the driven spur gear 50 of the boss 51 are rotatably supported by the gear case 47 by being respectively inserted into through holes 52, 52 formed in both front and rear walls of the lower portion 47a of the gear case 47. ing.

A hole 51a having a substantially oval cross section is formed through the center of the boss 51, and the rear end portion 31b of the vertical aiming adjusting shaft 31 slides axially in the hole 51a. Can be inserted freely. As a result, the vertical aiming adjustment shaft 31 and the driven spur gear 50 are coupled so as to rotate integrally.

Reference numeral 53 denotes an intermediate rotating body housed in the central portion 47b of the gear case 47, and a bevel gear 54 (hereinafter, referred to as "intermediate bevel gear") and a spur gear 55 (hereinafter, referred to as "intermediate bevel gear") coaxial with each other. "Intermediate spur gear"), the intermediate spur gear 54 and the intermediate spur gear 55 are connected together, and the shaft portion 56 protruding from the front surface of the intermediate spur gear 55 and the rear surface of the intermediate bevel gear 54 is integrally formed. The intermediate spur gear 55 is rotatably supported by the gear case 47 with the intermediate spur gear 55 positioned on the front side of the intermediate bevel gear 54, and the support is formed on both front and rear sides of the central portion 47b of the gear case 47 at both ends thereof. It is performed by being inserted separately into the support holes 57, 57 that are provided.

Therefore, the intermediate rotating body 53 is disposed near the rear end 31b of the upper and lower aiming adjustment shaft 31, and the intermediate spur gear 53 is meshed with the driven spur gear 50.

Reference numeral 58 denotes a bevel gear (hereinafter, referred to as a "drive bevel gear") housed in an upper portion 47c of the gear case 47 while being fixed to an operation shaft described later, and penetrates the center of the bevel gear in the axial direction. A coupling hole 58a is formed, and annular projections 58b, 5
8b are formed integrally, and the annular projections 58b, 58
b is rotatably supported by being inserted into support holes 59, 59 formed in both front and rear walls of the upper portion 47c of the gear case 47, and is also meshed with the intermediate bevel gear 54.

Reference numeral 60 denotes an operation shaft for rotating the vertical aiming adjustment shaft 31 when performing the vertical aiming adjustment, and the rear end portion 60a thereof has the connecting hole 5 of the drive bevel gear 58.
8a is non-rotatably press-fitted, whereby the operating shaft 60
The drive bevel gear 58 is fixed to the rear end portion 60a.

The operation shaft 60 is rotatably supported by a bracket 61 having its substantially central portion projecting rearward and upward from the upper end of the rear wall 8 of the lamp body 4, and the driving bevel gear 58. Is supported by the gear case 47 so as to be inclined obliquely forward and upward at an angle of approximately 45 °.

Therefore, the operating shaft 60 is linked to the vertical aiming adjusting shaft 31 via the drive bevel gear 58 fixed to this, the intermediate bevel gear 54 of the intermediate rotor 53, the intermediate spur gear 55, and the driven spur gear 50. You. Therefore, by turning the operation shaft 60, the vertical aiming adjustment shaft 31 is rotated, and by this rotation, the nut 46 is moved in the front-rear direction along the vertical aiming adjustment shaft 31, whereby the vertical aiming adjustment point C is adjusted. Displaced in the direction.

Since the operation shaft 60 and the vertical aiming adjustment shaft 31 are linked with each other as described above, the linking point is located to the front side to some extent from the intersection of the axes of the operation shaft 60 and the aiming adjustment shaft 31. It is located in a high place. That is, since the intermediate bevel gear 54, which directly meshes with the drive bevel gear 58 that is the rotation output portion of the operation shaft 60, is located somewhat above and above the aiming adjustment shaft 31, this distance is set as the axis of the operation shaft 60. The length divided by the tangent function of the angle formed by the axis of the upper and lower aiming adjustment shafts 31 (in this embodiment, the angle formed by the two axes is 45 °, so that the length is substantially the same as the distance) This is because the linkage point is located in front of the intersection.

As a result, the dimension of the headlamp 1 in the front-rear direction can be reduced by the above length . Especially,
While the intermediate gear is arranged above the adjustment shaft 31,
The gear is divided into a spur gear 55 and a bevel gear 54, and after the adjusting shaft 31
A spur gear that meshes with a driven spur gear 50 connected to the end
55 is disposed on the front side of the bevel gear 54, so that the adjusting shaft 3
The space behind the adjustment shaft 31 is as long as the length of 1 is short.
Can be secured widely. Also the middle teeth
Since the wheel was divided into an intermediate bevel gear 54 and an intermediate spur gear 55, each tooth
Even if the storage space is small enough to reduce the diameter of the car
Is enough.

Therefore, as described above, when the operating shaft 29 of the left / right aiming adjustment section 16 is turned, the left / right aiming adjustment point B is displaced in the front-rear direction.
Is tilted about a straight line connecting the upper and lower aiming adjustment points C, and thereby the irradiation direction is adjusted in the left and right directions. Further, when the operation shaft 60 of the vertical aiming adjustment unit 17 is rotated, the vertical aiming adjustment point C is displaced in the front-rear direction, so that the reflecting mirror 7 tilts with the line connecting the tilt fulcrum A and the left and right aiming adjustment point B as the tilt axis. Thus, the irradiation direction is adjusted vertically. Furthermore, the leveling mechanism 1
When the motor 42 of No. 8 is rotated, the nut 46 is moved in the front-rear direction integrally with the vertical aiming adjustment shaft 31, whereby the irradiation direction is adjusted in the vertical direction. At this time, the rear end 31b of the vertical aiming adjustment shaft 31 slides in the hole 51a of the driven spur gear 50.

Reference numeral 62 denotes a control code for the leveling mechanism 18, which is adjusted by detecting the rotation direction and the amount of rotation of the leveling drive unit 39 (not shown), which is disposed in the casing 33 of the leveling mechanism 18. A large number of signal cords and motors 42 for connecting between level detecting means and a leveling operation unit (not shown)
A connector socket in which a power supply cord or the like is bundled, and a connector plug 63 (see FIG. 6) is connected to one end thereof, and the connector plug 63 is fixed to the upper end portion of the rear wall of the casing 33. 64 (see FIG. 6).

A code protector 65 holds the cord 62 and stably holds the position with respect to the lamp body 4. The cord protector 65 includes a main portion 66 having a rectangular shape that is long in the front-rear direction when viewed from above, and a short side wall 6 raised from both left and right edges of the main portion 66.
7, 67 and a clamp piece 68 projecting upward from the rear end of the main part 66, and a support piece 69 projecting rearward from the rear end of the main part 66 by cutting and raising the lower left portion of the clamp piece 68.
The main portion 66 has a rear end portion 66a which is inclined rearward and upward, and the remaining portion 6
6b is horizontal, and the cord insertion hole 7 is provided at a position near the rear end of the horizontal portion 66b and at the bottom of the clamp piece 68.
0, 70 are formed, and these cord insertion holes 70, 7 are formed.
0 is opened leftward by the notches 70a and 70a.

Reference numeral 71 is a screw insertion hole formed in the upper end portion of the clamp piece 68, and 72 is an engaging cut groove formed in the center of the front end portion of the main portion 66.

In such a cord protector 65, an engaging piece 73 (see FIG. 4) protruding rearward from the lower end of the opening edge of the lamp body 4 is engaged with the engaging cut groove 72, and a screw insertion hole is provided. A screw 37 for fixing the attached piece 34 located at the lower right of the casing 33 of the leveling mechanism 18 is inserted into 71 (see FIG. 2) to be fixed to the lamp body 4 and the gear case 33, thereby the cord The protector 65 is arranged along the lower surface of the lamp body 4.

Then, the portion of the cord 62 near the connector plug 63 is held so as to crawl along the lower surface of the lamp body 4 by sequentially inserting it through the cord insertion holes 70, 70 of the cord protector 65. This cord 62 becomes an obstacle during assembly, or the vehicle body 3
There is no rubbing due to the vibration of.

[0052]

As it is apparent from the described above, according to the present invention, aiming adjustment apparatus of the present invention prior to an automotive head lamp is irradiation
The tilting member that defines the shooting direction and the tilting member that extends in a substantially horizontal direction
It is rotatably supported around the axis and the front end is
Connected with aiming adjustment point located near the lower end of the tilting member
The adjusted adjustment shaft and the lamp body from near the rear end of the adjustment shaft.
To extend diagonally forward and toward the periphery of the
The operating shaft placed and the rotation of the operating shaft is transmitted to the adjusting shaft.
Headlight for automobiles equipped with a gear transmission
A spur gear driven by a rear end of the adjusting shaft.
Is connected so as to rotate integrally with the adjusting shaft.
Then, a drive bevel gear is fixed to the rear end of the operation shaft,
Intermediate bevel gear meshing with the drive bevel gear above the alignment shaft
The vehicle and the intermediate bevel gear are located in front of the intermediate bevel gear and
Intermediate spur teeth that rotate physically and mesh with the driven spur gear
It is characterized by the arrangement of a car .

Therefore, in the aiming device for a headlamp for an automobile according to the present invention, the lamp body is arranged near the rear end of the adjusting shaft.
The operation shaft extending obliquely upward and forward toward the vicinity of the peripheral portion is a drive bevel gear and an intermediate bevel gear fixed to this, and an intermediate spur gear positioned on the front side of the intermediate bevel gear and a driven spur gear connected to the adjusting shaft. Since the intermediate bevel gear and the intermediate spur gear are arranged above the adjusting shaft through a gear transmission system including a gear, the connecting portion between the adjusting shaft and the operating shaft is connected to the operating shaft. The adjustment shaft can be positioned considerably in front of the intersection of the respective axis centers, whereby the dimension of the entire headlight device in the front-rear direction, that is, the depth can be reduced. Especially, when the intermediate gear is arranged above the adjustment shaft,
The intermediate gear is divided into a spur gear and a bevel gear,
The spur gear that meshes with the driven spur gear that is connected to
The adjustment shaft is shorter because it is located on the front side.
Ample space behind the adjustment axis can be secured
Become so. The intermediate gear is an intermediate bevel gear and an intermediate spur gear.
Separated into cars, so the diameter of each gear did not need to be increased.
Limited narrow space ahead of the intersection of the operation axis and the adjustment axis.
It can be stored in the room.

In the above embodiment, the intermediate bevel gear and the intermediate spur gear are integrally formed. However, these two gears are separately formed and are coupled so as to rotate integrally through one shaft. May be.

Further, in the above embodiment, since the aiming adjusting shaft also serves as the leveling adjusting shaft, the driven spur gear is connected to the adjusting shaft so as to be slidable in the axial direction. In a headlight device that does not include a headlight device or a headlight device in which a leveling adjustment shaft is provided separately from the aiming adjustment shaft, the driven spur gear may be fixed to the aiming adjustment shaft.

In addition, the structures, shapes, etc. of the respective portions shown in the above embodiments are merely examples of the embodiment in carrying out the present invention, and the technical scope of the present invention is limited by these. Should not be interpreted as.

In the above embodiment, the present invention is applied to an aiming adjustment device in a headlamp device of a movable reflector type, but the present invention is directed to an aiming adjustment device in a headlight device of a movable unit type. Can also be applied to.

[Brief description of the drawings]

FIG. 1 is a front view of an entire headlight device showing an example of an embodiment of an aiming adjustment device for a vehicle headlight according to the present invention.

FIG. 2 is a rear view of the entire headlight device.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a sectional view taken along the line VV of FIG. 1;

FIG. 6 is an enlarged sectional view showing a part of a headlamp main body, a vertical aiming adjustment unit, and a leveling mechanism.

FIG. 7 is an enlarged perspective view showing a main part of a vertical aiming adjustment unit.

FIG. 8 is an enlarged perspective view showing a cord protector.

[Explanation of symbols]

1 Automotive Headlight 4 Lamp Body 7 Tilt Member 17 Aiming Adjustment Device 31 Adjusting Shaft 50 Driven Spur Gears 50, 53, 58 Gear Transmission Mechanism 54 Intermediate Bevel Gear 55 Intermediate Spur Gear 58 Drive Bevel Gear 60 Operating Axis C Aiming Adjustment Point

Claims (1)

(57) [Claims] 1. A tilting member that defines an irradiation direction, and an aiming member that extends in a substantially horizontal direction and is rotatably supported around an axis and has a front end located near a lower end of the tilting member. The adjustment shaft connected to the adjustment point, and diagonally upward and forward from the vicinity of the rear end of the adjustment shaft toward the vicinity of the peripheral portion of the lamp body.
An operating shaft disposed so as to extend to the rotation of the operating shaft The vehicle headlamp aiming adjustment apparatus that includes a gear transmission mechanism for transmitting to the adjustment shaft, the rear end portion of the adjustment shaft the driven spur gear with coupling so as to rotate integrally with said adjustment shaft, and fix the drive bevel gear to the rear end of the operating shaft, and Oite the drive bevel gear above the adjusting shaft mesh
The intermediate bevel gear and the intermediate bevel gear that mate with the intermediate bevel gear rotate integrally with the intermediate bevel gear and mesh with the driven spur gear.
An aiming adjustment device for a headlight for an automobile, wherein an intermediate spur gear is arranged.