JP2563585Y2 - Optical axis adjustment confirmation device for automotive headlamp - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical axis adjustment confirming device for confirming the vertical optical axis adjustment of a headlight for an automobile, and more particularly, to an optical axis adjustment confirming apparatus in an actual light distribution. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical axis adjustment confirming device that can directly and easily confirm at a glance whether a moving angle is within an allowable range.

[0002]

2. Description of the Related Art A headlight for an automobile is dangerous because an excessively upward irradiation light may dazzle an oncoming vehicle. vice versa,
If the irradiation light is too downward, the road ahead in the traveling direction is not well illuminated, so it is difficult to drive. Therefore, it is necessary to provide a device for adjusting the optical axis of the headlamp for a vehicle slightly upward or downward while being mounted on the vehicle body.

One example of this type of vehicle headlight is described in Japanese Patent Application Laid-Open No. 3-276502. In this automotive headlamp, an adjustable body is mounted on a mounting body so as to be rotatable by a pivot bearing mechanism, and the adjustable body is provided with a light source bulb. Equipped with an optical axis adjustment mechanism. By operating the optical axis adjusting mechanism for the vertical direction, the object to be adjusted is rotated in the vertical direction with respect to the mounting body to adjust the optical axis in the vertical direction. In addition, in the above-mentioned automotive headlamp, in addition to the optical axis adjusting mechanism for the vertical direction, an optical axis adjusting mechanism for the horizontal direction is also provided, and the optical axis adjusting mechanism for the horizontal direction is operated. Thus, the optical axis can be adjusted in the left-right direction by rotating the object to be adjusted in the left-right direction with respect to the mounting body. The above-mentioned automotive headlights include a reflector movable type and a lamp unit movable type. In the reflector movable type, a reflector as an adjustment target is rotatably attached to a lamp housing as an attachment. The lamp unit movable type is configured such that a lamp unit as an object to be adjusted is rotatably attached to a vehicle body as an attachment.

[0004] Although the above-mentioned direction of the optical axis requires strict adjustment, it cannot be easily adjusted by specialized equipment and technical experts. Therefore, before being shipped from an automobile manufacturing factory and when installed in a specialized maintenance shop, a specialized engineer adjusts the optical axis direction by using a dedicated adjustment facility. However, if the optical axis adjustment of the automobile whose optical axis direction has been adjusted is incorrect for some reason, readjustment is required. In this case, re-adjustment does not start from a state without reference at all, but since the accurate adjustment has already been performed once, if you take a method of reproducing the adjustment state,
It can be implemented without specialized equipment or technicians. Various optical axis adjustment confirmation devices (specifically, devices for confirming whether or not the optical axis has been adjusted to a state after the optical axis adjustment) based on such a concept have been devised and put into practical use.

[0005] An example of this type of optical axis adjustment confirmation device is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 3-276502. This optical axis adjustment confirmation device includes a horizontal extending portion provided on the object to be adjusted, a casing which is indirectly attached to the horizontal extending portion via a leaf spring or the like or directly with a screw or the like, and a bubble tube. A lid supporting the bubble tube on the back surface and having one end engaged with one end of the casing, and a spring having the other end of the lid attached to the other end of the casing so as to be vertically tiltably adjustable. And a screw. After finishing the optical axis adjustment by the specialized equipment and technician, operate the adjusting screw so that the bubble in the bubble tube is located at the reference line (zero point of the scale), and perform the initial setting of the optical axis adjustment confirmation device. Keep it. Then, when it is considered that there is a possibility that the optical axis direction may be deviated due to the mounting or loading of the vehicle body, the position of the bubbles in the bubble tube is visually recognized while the vehicle is stopped on a horizontal floor. At this time, if the bubble does not match the reference line, the optical axis in the vertical direction is out of order, so the optical axis adjusting mechanism for the vertical direction is operated,
What is necessary is just to adjust the tilt of the object to be adjusted in the vertical direction so that the bubble coincides with the reference line while observing the movement of the bubble in the bubble tube. By this operation, the vertical direction of the optical axis is restored to the original state adjusted accurately.

[0006] In the headlamp for performing such optical axis adjustment, since the vehicle conditions such as tire pressure, suspension deflection (sagging), and the number of occupants are constantly changing, the manufacturing variation of the headlamp bulb is also increased. Therefore, the light distribution of the headlight actually mounted on the vehicle has a certain tolerance. That is, in the actual light distribution of the headlight described above, there is a certain allowable range in the vertical movement angle of the optical axis of the headlight. Therefore, at the time of optical axis adjustment after the initial setting of the above-described optical axis adjustment confirmation device, the above-mentioned optical axis adjustment confirmation device checks the amount of movement of the bubbles in the bubble tube, and the vertical direction of the optical axis of the headlight It is sufficient if it is determined whether or not the moving angle is within the allowable range.

[0007]

However, the above-mentioned conventional optical axis adjustment confirming device reads the scale directly attached to the bubble tube of the level and the moving amount of the bubble in the bubble tube, that is, reads the scale. By counting, it was determined whether the vertical movement angle of the optical axis of the headlight was within an allowable range. For this reason, it takes time to determine the allowable range, and there is a possibility that a mistake may be made.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical axis adjustment which can directly and easily confirm at a glance whether the vertical movement angle of the optical axis of a headlight in an actual light distribution is within an allowable range. It is to provide a confirmation device.

[0009]

The present invention is characterized in that a level is provided with a mark indicating an allowable range in the vertical movement angle of the optical axis of the headlight.

[0010]

According to the present invention, when the optical axis is adjusted,
By simply reading the relative position between the bubble of the level and the mark indicating the allowable range, it is possible to determine at a glance whether the vertical movement angle of the optical axis of the headlight in the actual light distribution is within the allowable range. You can easily check.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Three embodiments of the optical axis adjustment checking device according to the present invention will be described below with reference to the accompanying drawings. 1 to 23 show a first embodiment of the optical axis adjustment confirming device of the present invention. In the figure, A is a reflector movable type vehicle headlamp equipped with the optical axis adjustment confirmation device of the present invention. This automotive headlamp A has the following structure. That is, as shown in FIGS. 1 to 4, a front lens 100 is disposed in a front opening of a lamp housing 1 as a mounting body, and the front lens 100 and the lamp housing 1 are disposed.
Thus, the lamp room 101 is formed. A movable reflector 2 as an object to be adjusted is provided in the lamp chamber 101, and the movable reflector 2 is rotatably mounted on the lamp housing 1 by a pivot bearing mechanism. On the front side of the movable reflector 2, a reflecting surface for reflecting light from a light source bulb 103 described later toward the front lens 100 is provided.
A light source bulb 103 is provided on the reflection surface side of the movable reflector 2, and the light source bulb 103 is disposed in the lamp room 101. The lamp housing 1 and the movable reflector 2 are provided with a vertical optical axis adjusting mechanism 104 and a horizontal optical axis adjusting mechanism 105. By operating the optical axis adjusting mechanism 104 for the vertical direction or the optical axis adjusting mechanism 105 for the horizontal direction, the movable reflector 2 (including the light source bulb 103) is moved vertically or horizontally with respect to the lamp housing 1. The optical axis is adjusted by rotating in the direction. Note that the above-described optical axis adjustment mechanism 104 for the vertical direction, the optical axis adjustment mechanism 105 for the horizontal direction, the pivot bearing mechanism 102, and the like are described in, for example, JP-A-3-27.
As described in Japanese Patent Application Laid-Open No. 6502, this is a self-evident means, and a detailed description and illustration of its structure are omitted. Also,
2 and 3, reference numeral 106 denotes a left-right optical axis adjustment confirmation device, and 107 denotes a vertical optical axis adjustment confirmation device of the present invention.

As shown in FIGS. 4 to 6, an opening 10 is provided in the rear portion of the lamp housing 1 at a position where the optical axis adjustment checking device of the present invention is provided. A step is provided on the periphery of the opening 10 of the lamp housing 1. On the other hand, a mounting boss 20 is integrally formed on the rear surface of the movable reflector 2 at a position where the optical axis adjustment checking device of the present invention is provided, and two positioning bosses are provided on both sides of the mounting boss 20. The protrusions 21 are respectively provided integrally and protruded. In addition, the positioning convex portion 21 is closer to the mounting boss portion 2.
Slightly longer than 0.

In FIG. 1, reference numeral 5 denotes a mounting member for mounting a level 36 described later to the movable reflector 2. As shown in FIGS. 7 to 9, the mounting member 5 is formed by fixing a second mounting plate 52 also made of, for example, a thin steel plate to a first mounting plate 51 made of, for example, a thin steel plate by welding or the like. The first mounting plate 51 is composed of a narrow portion on one end side and a wide portion on the other end side substantially from the middle. The wide portion of the first mounting plate 51 is bent at a right angle to form a horizontal portion 510 and a vertical portion 511, and both side edges from one end of the horizontal portion 510 of the first mounting plate 51 to the middle of the vertical portion 511. Fold the part at a right angle. A screw hole 512 is provided substantially at the center of the horizontal portion 510. At the center of the vertical portion 511, a through hole 513 for penetrating the mounting screw 50 is provided.
2 for allowing two positioning projections 21 to penetrate on both sides of
Each of the through holes 514 is provided. The second mounting plate 52
Is made by bending both sides of the horizontal bottom at right angles. This second
The spring portion 5 of the tongue-shaped leaf spring as an elastic member is cut and raised from the center of the horizontal bottom of the mounting plate 52 to one end thereof.
20 is formed. A tip portion of the spring portion 520 is bent horizontally to provide a horizontal contact portion that contacts a bottom portion of the case 6 described below. Although this spring portion 520, that is, the elastic member is provided integrally with the mounting member 5, a level 36 to be described later is used.
May be provided integrally on the case 6 side, or the mounting member 5
And the case 6 may be provided integrally. At the other end of the horizontal bottom of the second mounting plate 52, a through hole 521 for penetrating a screw 53 for holding an initial setting, which will be described later, is provided with the first mounting plate 5.
It is provided so as to communicate with one screw hole 512. At one end of each of the two vertical sides of the second mounting plate 52, a pair of conical concave portions 522 are integrally provided. The engagement recess 522 may be a recess other than the above-described conical recess, or may be separate from the second mounting plate 52 and fixed by bonding or the like. As shown in FIG.
The two positioning through holes 514 are externally fitted to the two positioning projections 21 of the movable reflector 2 to determine the mounting position of the mounting member 5 on the movable reflector 2. next,
The mounting member 5 is mounted on the movable reflector 2 by mounting screws 50. The positioning mechanisms 21 and 514 maintain the horizontality of the mounting member 5 attached to the movable reflector 2 in the short direction (the direction of arrow a in FIG. 6).

In the drawing, reference numeral 53 denotes a screw as an initial setting holder of the level. The screw 53 rotates the level 36 described later around the support fulcrum of the supporting members 522 and 602 to perform the initial setting of the level 36, and to change the attitude of the level 36 after the initial setting. Spring 520
Is held against the elastic force of

By the above-mentioned supporting members 522 and 602, the spring portion 520, and the screw 53, a level 36 described later is provided.
The initial setting mechanism for performing the initial setting of is configured. In addition, the initial setting mechanism has a relatively small number of parts because the spring portion 520 is provided integrally with the mounting member 5.

In FIG. 1, reference numeral 36 denotes a level which accommodates and holds the bubble tube 3 in the case 6. The bubble tube 3 forms a bubble 31 by enclosing a liquid such as anhydrous alcohol in a transparent tube 30 made of, for example, BC (semi-hard glass), as shown in FIGS. The transparent tube 3 of this bubble tube 3
The scale 32 is provided on the upper surface of the zero at right angles to the axial direction (longitudinal direction). At the center of one end surface of the transparent tube 30 of the bubble tube 3, a substantially conical convex portion 33 for sealing a liquid is integrally provided, and a flat reference surface 34 is formed on the other end surface of the transparent tube 30. . The transparent tube 30 of the bubble tube 3
Is formed in a curved shape in which the central part is slightly raised upward and both ends are slightly lowered when viewed from the side. The case 6 is made of, for example, a synthetic resin such as PP (polypropylene). As shown in FIGS. 7, 13, and 17, the case 6 is provided with one end of a lid portion 62 at one end of a main body portion 60 so as to be openable and closable via an integrated connection portion 61 and integrally.

The main body 60 is provided with a housing recess 630 for housing the bubble tube 3 therein, and has a hollow rectangular parallelepiped shape with an open upper surface. The opening 63 on the upper surface is provided as an entrance for housing the bubble tube 3 in the housing recess 630 and as a see-through portion for seeing through the bubble tube 3 in the housing recess 630. is there. A through hole 60 for passing the screw 53 through the other end of the main body 60
0 and a pair of locking grooves 601 are provided on the left and right side walls at the other end of the main body 60. An opening 604 is provided at one end of the main body 60, and substantially conical for vertically rotatably supporting the pair of engaging recesses 522 of the mounting member 5 on both outer surfaces of one end of the main body 60. A pair of engaging projections 602 having a shape are provided integrally. In addition, the engaging convex portion 602 may have a convex shape other than the above-described conical shape, or may be separate from the main body portion 60 and fixed by bonding or the like. On the other hand, the lid 62 has a rectangular plate shape. A through hole 620 for seeing through a bubble tube is provided at substantially the center of the entire lid 62. A pair of lance-shaped locking claws 621 that lock into the pair of locking grooves 601 are provided on both left and right sides of the other end of the lid portion 62. The integral connecting portion 61 has a thin hinge structure. Main body 6 for housing and holding the bubble tube 3
0 and a lid 62 provided with a through-hole 620 for seeing through a bubble tube and a pair of central reference projections 622 are integrally connected to be openable and closable by an integral connecting portion 61 having a hinge structure. The score can be reduced.

In the drawing, reference numeral 622 denotes a projection as a mark indicating an allowable range in the vertical movement angle of the optical axis of the headlamp. The protrusion 622 forms a small triangle, and faces upward at a position corresponding to a permissible range in the vertical movement angle of the optical axis of the headlight among the opposite left and right edges of the through hole 620 of the lid portion 62. The one indicating the permissible range on the side and the one indicating the permissible range on the downward side are projected one by one into a total of two pairs. The protrusion 622 determines the relative relationship between the vertical movement angle of the optical axis of the headlight within the allowable range and the movement distance of the bubble 31 of the bubble tube 3 of the level 36 in advance.
It is provided at a predetermined position of the case 6. The lid 6
At the edge of the through hole 620 on the surface of No. 2, "U" indicating an upward side, "D" indicating a downward side, and "0" indicating a 0 position are respectively attached.

In the figure, reference numeral 64 denotes a rib-shaped or plate-shaped elastic holding portion provided at one end of the main body 60 of the case 6. The elastic holding portion 64 is formed by integrally projecting from the upper edge of the opening 604 at one end of the case 6.
The thickness is made thinner than the thickness of the case 6 to provide elasticity. A notch 640 is provided in the elastic holding portion 64 from the lower end to the base of the case 6. The width of the notch 640 is slightly smaller than the outer diameter of the convex portion 33 of the bubble tube 3 where the elastic holding portion 64 is located when the bubble tube 3 is stored in the case 6. The elastic holding portion 64 can absorb the strain generated due to the difference in the thermal expansion coefficient between the case 6 and the bubble tube 3. Problems can be prevented, and the bubble tube 3 can be securely held in the case 6. In the figure, 65 is the main body 60
Is a reference plane of a flat surface provided on the other end surface of the accommodation concave portion 630.

In the figure, 66 is both longitudinal side walls of the housing recess 630 of the main body 60. This side wall 66
Is substantially equal to or slightly smaller than the outer diameter of the transparent tube 30 of the bubble tube 3. The two side walls 66 hold both sides of the bubble tube 3 therebetween. In the figure, 67 is the bottom of the housing recess 630 facing the opening 63 of the main body 60. The upper surface of the bottom portion 67 is curved so as to be slightly upward at the center and slightly downward at both ends so as to match the lower surface of the bubble tube 3. In the figure, reference numeral 68 denotes an edge of the opening 63 of the main body 60, which is at least a pair of projections integrally protruding from the substantially central inner surfaces of the side walls 66. In this example, it is a lance-shaped claw. The claw portion 68 is for preventing the bubble tube 3 in the housing recess 630 from coming out of the opening 63. That is, the claws 68
Is for pressing the bubble tube 3 against the bottom portion 67 and holding the bubble tube 3 together with the bottom portion 67. The directions in which the claw portion 68 and the bottom portion 67 hold the bubble tube 3 are the elastic holding direction of the elastic holding portion 64 and the reference surface 65 (the direction of arrow c in the drawing) and the holding direction of the side walls 66 (see FIG. And a direction (arrow e direction in the figure) perpendicular to the middle and arrow d directions, respectively. In the figure, reference numeral 7 denotes two pairs of cutouts provided on both sides of the pair of claws 68. The cutouts 7 are provided on the both side walls 66, on both sides of the claw portion 68, at locations from the opening 63 to substantially the middle of the side walls 66. This notch 7
As will be described later, when the bubble tube 3 is accommodated in the case 6, the claw portion 68 is allowed to open and close flexibly. In the drawing, reference numeral 69 denotes two pairs of connecting portions provided in the two pairs of notches 7, respectively. The connecting portion 69 is for preventing the edge of the opening of the case 6 from being deformed to bend upward when performing initial setting by rotating the level 36 as shown in FIG. When accommodating the bubble tube 3 in the case 6, the claw 6
8 is also for permitting a flexible opening and closing movement. The connecting portion 69 connects both sides of the claw portion 68 separated by the notch 7 and the both side walls 66. The connecting portion 69 has a thin shape provided in the notch 7. The thin connecting portion 69 is provided inside the notch 7 inside the side walls 66 as shown in FIG. 8, or outside the side walls 66 as shown in FIG. Is provided in the middle of the thickness direction. Two pairs of thin connecting portions 6 provided in the notches 7 on both sides of the claw portion 68
9, the movement of the claw portion 68 is allowed and the deformation of the case 4 can be prevented, so that the bubble tube 3 can be more securely held in the case 6.

Thus, the bubble tube 3 is pushed into the main body 60 through the opening 63 of the case 6 so that the lower surface of the bubble tube 3 is aligned with the upper surface of the bottom 67 of the case 6 and the bubble tube 3 is removed. The elastic holding portion 64 is inserted in the convex portion 33 of the bubble tube 3 while being housed in the case 5. Then, the width of the notch 640 of the elastic holding portion 64 is slightly smaller than the outer diameter of the convex portion 33 of the bubble tube 3 where the elastic holding portion 64 is located when the bubble tube 3 is stored in the case 6. , FIG.
As shown in FIG. 12, the elastic holding portion 64 escapes and bends in the direction of the conical tip of the convex portion 33 of the bubble tube 3 (the direction opposite to the direction of the arrow b). As a result, the bubble tube 3 is pressed in the direction of arrow b by the elastic return force of the elastic holding portion 64 in the direction of arrow b, and the reference surface 34 of the bubble tube 3 is further pressed against the reference surface 65 of the case 6. Then, both ends of the bubble tube 3 are sandwiched between the elastic holding portion 64 of the case 6 and the reference surface 65, and are elastically held in the axial direction of the bubble tube 3, that is, in the direction of arrow c. 7 and 15, both sides of the bubble tube 3 are sandwiched and held by the side walls 66 of the case 6 in a direction perpendicular to the axial direction of the bubble tube 3, that is, in the direction of arrow d. You. Further, as shown in FIG. 14, the bubble tube 3 is moved by the pair of claws 68 and the bottom 67 in the elastic holding direction c of the elastic holding portion 64 and the reference surface 65 and in the holding direction d of the side walls 66. Are held in a direction perpendicular to each other, that is, in the direction e.
As a result, the curved bottom surface of the bubble tube 3 is pressed against the curved bottom surface of the case 6.

Therefore, the bubble tube 3 is displaced in the housing recess 630 of the case 6 in the axial direction of the bubble tube 3, in the direction perpendicular to the axis of the bubble tube 3, and in the direction around the axis of the bubble tube 3. And rotation of the camera is prevented. As a result, the bubble tube 3 can be securely held in the case 6. In particular, in the present invention, two pairs of notches 7 are provided on both sides of a pair of claw portions 68, so that when the bubble tube 3 is accommodated in the case 6, as shown in FIG. Only the pair of claw portions 68 flexibly open outward slightly, but the side walls 66 do not open outward and hold both sides of the bubble tube 3 firmly to prevent the bubble tube 3 from rotating around the axis. Can be prevented.

When the bubble tube 3 is stored and held in the case 6, as shown in FIG. 12, the lid portion 62 is rotated in the direction of the arrow at the integral connecting portion 61 of the hinge structure.
The pair of locking claws 621 of the lid 62 are locked in the pair of locking grooves 601 of the main body 60, and the opening 63 of the main body 60 is formed.
Is covered with a cover 62. At this time, since the lid 62 is provided with the through-hole 620 for see-through, it does not affect the visual inspection of the bubble tube 3 at all. Thus, the level 36 is formed.

Thus, the pair of engagement projections 602 of the level 36 is engaged with the pair of engagement recesses 522 of the mounting member 5, and the level 36 is attached to the mounting member 5.
The support member is formed so as to be rotatable up and down around a support fulcrum of the support member including the protrusion 22 and the engagement protrusion 602. Next, screw 5
3 is screwed into the screw hole 512 of the mounting member 5 through the through hole 600 of the level 36. As a result, the level 36
Is attached to the attachment member 5 so as to be able to be initialized.
In addition, the posture of the level 36 after the initial setting is held against the elastic force of the spring 520. Also,
The level 36 is connected to the lamp room 10 of the automotive headlamp A through the opening 10 of the lamp housing 1 through the mounting member 5.
1 will protrude outside.

In the drawing, reference numeral 8 denotes a heat insulating member. As shown in FIGS. 2 to 6, the heat insulating member 8 is made of a member having a soft rubber elasticity, and has an annular portion 80 fitted to the periphery of the opening 10 of the lamp housing 1, and an annular portion 80.
And a sheet portion 81 integrally formed to cover the opening 10. A plurality of slits 82 for facilitating the insertion of the level 36 and the mounting member 5 are provided radially in the seat portion 81, and a plurality of round holes 83 are provided at the tips of the plurality of slits 82. , So that no crack is generated from the tip of the slit 82. Heat insulation member 8 described above
The annular portion 80 is fitted to the periphery of the opening 10 of the lamp housing 1, and the sheet portion 81 of the heat insulating member 8 covers the opening 10 of the lamp housing 1. The heat-insulating member 8 blocks the level 36 on the outside of the vehicle headlight A from heat convection of air in the lamp room 101 of the vehicle headlight A. As a result, the level 36 is not affected by the heat as much as possible, and the optical axis adjustment can be confirmed accurately. Although the above-described heat-insulating member 8 is attached to the periphery of the opening 10 of the lamp housing 1, it may be attached to the periphery of the opening end of the transparent cap 11 described later.

In the figure, reference numeral 11 denotes a transparent cap.
This transparent cap 11 is, as shown in FIGS.
It is made of PMMA (methyl polymethacrylate) or the like, and has a hollow cylindrical shape with one end opened. On the outer surface of the transparent cap 11 on the opening end side, three mounting pieces 110 are integrally provided at equal intervals. The mounting piece 110 has a substantially triangular shape, and is provided perpendicularly and radially to the transparent cap 11. Further, a step portion protruding outward is provided at the opening end of the transparent cap. This transparent cap 11
Covers the level 36 protruding outside the lamp chamber 101 of the headlight A for an automobile, and the opening 1 of the lamp housing 1.
Cover 0. Also, an O-ring is interposed between the inside of the step at the opening end of the transparent cap 11 and the outside of the step at the periphery of the opening 10 of the lamp housing 1. The three mounting pieces 110 of the transparent cap 11 are connected to three mounting screws 111.
To the periphery of the opening 10 of the lamp housing 1.
The transparent cap 11 covers the level 36 protruding to the outside of the lamp chamber 101 of the automotive headlamp A, so that the level 36 may be exposed to an external impact or the like (for example, if a foreign object hits or water enters the level). To be protected.)

Since the optical axis adjustment confirming device of the present invention has the above-mentioned configuration, when the optical axis adjustment by the specialized equipment or technician is completed, the transparent cap 11 is removed and the bubbles 31 of the bubble tube 3 are moved to the center reference line. Alternatively, the screw 53 is operated so as to coincide with “0” indicating the 0 position of the case 6 to perform the initial setting of the level 36. When the initial setting of the level 36 is completed, the transparent cap 11 is attached to the mounting screw 1.
At 11, it is attached to the lamp housing 1. afterwards,
When it is considered that there is a possibility that the optical axis direction may be deviated due to the mounting or the load, the bubble tube 3 may be stopped from the outside of the transparent cap 11 while the vehicle is stopped on a horizontal floor.
The position of the bubble 31 is visually recognized. At this time, as shown in FIG. 20A, if the bubble 31 is located inside from the position symmetrical with respect to the protrusion 622 indicating the allowable range of the case 6, that is, the center of the bubble 31 If it is located inside, it can be easily and accurately determined at a glance that the vertical movement angle of the optical axis of the headlight is within the allowable range.

If the bubble 31 of the level 36 is located outside the projection 622 during the above-described optical axis adjustment, it is determined that the vertical movement angle of the optical axis of the headlight is out of the allowable range. can do. In this case, the transparent cap 1
The operator operates the optical axis adjustment mechanism 104 for the vertical direction while visually observing the movement of the bubble 31 from the outside without removing the movable member 1, and moves the movable reflector 2 in the vertical direction so that the bubble 31 is positioned inside the protrusion 622. It is only necessary to adjust the tilt. By this operation, the optical axis of the headlight can be corrected within an allowable range. Of course, if the movable reflector 2 is tilted up and down so that the bubble 31 coincides with "0" indicating the 0 position, the up and down direction of the optical axis Z-Z is restored to the original state adjusted accurately. can do.

As described above, in the optical axis adjustment confirming device of the present invention, the case 6 of the level 36 is provided with the projection 622 indicating an allowable range in the vertical movement angle of the optical axis of the headlight. When the optical axis is adjusted, the vertical movement angle of the optical axis of the headlight in the actual light distribution is within the allowable range only by reading the relative position between the bubble 31 of the level 36 and the protrusion 622 indicating the allowable range. Whether or not it is possible can be confirmed directly and easily at a glance.

FIG. 20B is a plan view of a level showing a modification of the relative positional relationship between the bubble and the projection. In this case, when the outer end of the bubble 31 is located at the protrusion 623, the vertical movement angle of the optical axis of the headlight is within the allowable range. In FIG. 20B and FIG. 20A described above, the bubble 31 indicated by a solid line indicates the downward side of the optical axis, and the bubble 31 indicated by a broken line indicates the upward side of the optical axis. FIG. 20C is a plan view of a level showing a modified example of the mark indicating the allowable range of the vertical movement angle of the optical axis of the headlight. The mark 624 indicates the through hole 62 of the lid 62 of the case 6.
A small triangular mark formed by printing or the like on the edge of 0 is formed. FIG. 20D is a plan view of a level showing a modification of the mark indicating the allowable range of the vertical movement angle of the optical axis of the headlight. This mark 625 indicates the through hole 6 of the lid 62 of the case 6.
A small circle mark formed by printing or the like is formed on the edge of the reference numeral 20. In the above-described embodiment, the mark (protrusion 62) indicating the allowable range in the vertical movement angle of the optical axis of the headlamp.
2,623, small triangle mark 624, small circle mark 625
Is provided on the case 6 of the level 36, but this mark may be provided directly on the bubble tube 3 of the level 36.

FIG. 24 is a sectional view showing a second embodiment of the optical axis adjustment confirming apparatus according to the present invention, which is mounted on a headlamp B for a vehicle having a movable lamp unit. This automotive headlamp B of a movable lamp unit type includes a lamp housing 1, a fixed reflector 200, a lamp unit (adjusted body) including a light source bulb (not shown), and the like mounted on a vehicle body 109 to which a pivot bearing or the like is attached. (Not shown) so that the lamp unit and the vehicle body 109 are equipped with an optical axis adjusting mechanism (not shown). The mounting member 5 is mounted to the boss portion 108 of the lamp housing 1 of the movable head unit B for a vehicle by using mounting screws 50.
The level 36 is attached by supporting members 522 and 602 and an elastic member (not shown) and the screw 53, the level 36 is positioned outside the lamp chamber 101, and the level 36 is fixed by the transparent cap 11. cover. The optical axis adjustment confirmation device of this example is similar to the above-described optical axis adjustment confirmation device, and at the time of optical axis adjustment, the bubble 31 of the level 36 and a mark (protrusion 6) indicating an allowable range.
22, 623, small triangle mark 624, small circle mark 62
By simply reading the relative position of the headlamp and the like, it is possible to immediately and easily confirm at a glance whether or not the vertical movement angle of the optical axis of the headlamp is within the allowable range.

FIG. 25 is a sectional view showing a third embodiment of the optical axis adjustment confirming device according to the present invention. In this embodiment, the mounting member 5 is eliminated, and the optical axis adjustment checking device (consisting of the level 36 and the like) of the present invention can be initially set to the movable reflector 2 (or the lamp unit B) as an object to be adjusted. It is directly attached. That is, the mounting member 201 is integrally provided rearward at the rear portion of the movable reflector 2, and the mounting member 201 is protruded from the opening 10 of the lamp housing 1 to the outside. The mounting member 201 has the same vertical cross-sectional shape as the second mounting plate 52 of the mounting member 5 described above.
The level 36 is placed on the horizontal bottom of the mounting member 201 projecting to the outside, and the level 36 is mounted on both vertical sides of the mounting member 201 by supporting members (a pair of engaging recesses 202 and a pair of engaging protrusions). Portion 602), is rotatably supported, an elastic member (not shown) is interposed between the horizontal bottom of the mounting member 201 and the bottom of the level 36, and the screw 53 is connected to the case 6 of the level 36. Into the mounting member 201 via the. Then, the level 36 protruding outside from the lamp chamber 101 is covered with the transparent cap 11. Further, the heat insulating member 8 is stretched in the opening 10 of the lamp housing 1. The optical axis adjustment confirming device of this example is similar to the above-described optical axis adjustment confirming device, and at the time of optical axis adjustment, the bubble 31 of the level 36 and a mark (protrusion 622, 623, small triangular mark 624,
Just read the relative position with the small circle mark 625 etc.)
Whether the vertical movement angle of the optical axis of the headlight is within the allowable range can be immediately and easily confirmed at a glance. Although FIG. 25 has been described with reference to a movable reflector type automobile headlamp, the present invention can also be applied to a movable lamp unit type. In this case, a mounting member is integrally protruded rearward from the lamp housing 1, and a level is mounted on the mounting member via a support member, an elastic member, a screw, or the like so that initial setting is possible.

[0033]

As is apparent from the above description, the optical axis adjustment confirming device of the present invention is provided with a mark indicating the allowable range in the vertical movement angle of the optical axis of the headlight on the level. By simply reading the relative position between the bubble of the level and the mark indicating the allowable range when adjusting the optical axis, it is possible to determine at a glance whether or not the vertical movement angle of the optical axis of the headlight is within the allowable range. And it can be easily confirmed.

[Brief description of the drawings]

FIG. 1 is a front view of a reflector movable type vehicle headlamp equipped with an optical axis adjustment checking device.

FIG. 2 is a rear view of the same.

FIG. 3 is an enlarged rear view of the main part.

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

FIG. 5 is an enlarged sectional view of a main part of the same.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

FIG. 7 is a plan view of a case in which a bubble tube is stored and a lid is opened.

FIG. 8 is a partial perspective view showing a claw portion and a connection portion of the case.

FIG. 9 is a partial perspective view showing a modified example of a claw portion and a connecting portion of a case.

FIG. 10 is a partial perspective view showing an elastic holding state of the elastic holding portion of the case and the bubble tube.

FIG. 11 is a plan view of the case in which the bubble tube is housed and the lid is closed.

12 is a sectional view taken along line XII-XII in FIG.

13 is a cross-sectional view of FIG. 12 in a state where a lid of a case is opened.

FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 11;

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a side view of the case in which the bubble tube is housed and the lid is closed.

FIG. 17 is a front view of the case in which the bubble tube is housed and the lid is closed.

FIG. 18 is a side view showing a state where a cover of the case is opened in FIG. 16;

FIG. 19 is a rear view of the case in which the bubble tube is housed and the lid is closed.

20A is a plan view of a level showing a state in which the vertical movement angle of the optical axis of the headlight is within an allowable range, and FIG. 20B is a relative positional relationship between bubbles and protrusions. (C) is a plan view of a level showing a modification example of a mark indicating an allowable range of a vertical movement angle of an optical axis of a headlight, and (D) is a plan view of a level showing a modification example of (a). It is a top view of the level which showed the modification of the mark which similarly shows the permissible range of the movement angle of the optical axis of a headlamp in the up-down direction.

FIG. 21 is a plan view of a mounting member.

FIG. 22 is a sectional view taken along line XXII-XXII in FIG. 21.

23 is a sectional view taken along line XXIII-XXIII in FIG. 21.

FIG. 24 is a longitudinal sectional view showing a second embodiment of the optical axis adjustment confirming device according to the present invention, which is mounted on a movable head unit of a vehicle headlamp;

FIG. 25 is a sectional view showing a third embodiment of the optical axis adjustment checking device of the present invention.

[Explanation of symbols]

A: a reflector movable type automotive headlamp, 1: a lamp housing (attachment), 2: a movable reflector (adjustable body), 3: a bubble tube, 5: an attachment member, 6: a case, 8: a heat insulation member, DESCRIPTION OF SYMBOLS 10 ... Opening of a lamp housing, 11 ... Transparent cap, 36 ... Level, 53 ... Screw (initial setting holder), 520 ... Spring part, (elastic member), 522 ... Engaging recess (support member), 602 ... Convex part (support member), 60
... body part of the case, 61 ... integral connecting part of hinge structure, 6
2 Lid, 63 Opening, 64 Elastic holding part, 65 Reference surface, 66 Side walls, 67 Bottom, 68 Claw, 69
Connecting part, 620 ... through-hole (transparent part), 622 and 623 ...
Projection (mark), 624 ... Small triangular mark (mark), 625
... A small circle mark (mark), 7... Notch, B... Lamp head movable type automobile headlight (adjustable body with lamp unit), 109.
02: engagement recess (support member).

Claims (1)

(57) [Scope of request for utility model registration] 1. An attachment, an object to be adjusted rotatably attached to the attachment, a light source bulb mounted on the object to be adjusted, and a rotation of the object to be adjusted vertically with respect to the attachment. An optical axis adjusting mechanism for adjusting the optical axis in the vertical direction by moving the electronic device, wherein a level including a case and a bubble tube is attached to the object to be adjusted, and a bubble of the level is provided. An optical axis adjustment confirming device that confirms vertical optical axis adjustment of the object to be adjusted by visually observing the movement of bubbles in a tube, wherein the level is vertically movable with respect to an optical axis of a headlight in an actual light distribution. An optical axis adjustment confirmation device for a vehicle headlamp, comprising a mark indicating a permissible range of a direction movement angle.