JPH089846Y2 - Optical axis adjustment confirmation device for automobile headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an optical axis adjustment confirmation device for a vehicle headlight, and in particular, a correct light distribution can always be obtained, and the optical axis adjustment amount can be adjusted even in a dark place. The present invention relates to a readable optical axis adjustment confirmation device.

[Prior Art] As a conventional optical axis adjustment confirmation device for a vehicle headlight, there is, for example, one described in Japanese Patent Laid-Open No. 2-6726.

The conventional optical axis adjustment confirmation device will be described below with reference to FIG.

In the figure, reference numeral 1 denotes a lamp body as a mounting body of an automobile headlamp, which is a housing 10, a lens 11 adhered and fixed to a front opening portion of the housing 10, and a ball provided on the housing 10. A concave bearing portion 12 and a lamp chamber 13 defined by the housing 10 and the lens 11 are provided.

In the figure, 2 is a reflector as an object to be adjusted of an automobile headlamp, and this reflector 2 has a reflecting surface 20 which is, for example, a paraboloid of revolution on the front surface, and a ball axis 21 on the rear surface side of this reflector 2. Plant.

By rotatably fitting the spherical shaft 21 of the reflector 2 into the bearing portion 12 of the housing 10, the reflector 2
Is rotatably attached to the housing 10, and the reflector 2 is arranged in the lamp chamber 13 of the lamp body 1.

A light source bulb (not shown) is arranged on the front side of the reflector 2.

In the figure, reference numeral 3 denotes an optical axis adjusting mechanism. The optical axis adjusting mechanism 3 is attached to the reflector 2 so as not to be rotatable and immovably in the axial direction of an adjusting screw 31 which will be described later, and the housing 10. And an adjusting screw 31 mounted so as to be rotatable but not axially movable. Such Adjust Screw
Screw mounting by rotating 31
The reflector 2 is rotated in the up-down direction or the left-right direction via 30 and, as a result, the optical axis is adjusted.

In the figure, 4 is an optical axis adjustment confirmation device, which is a hollow cylindrical case 40 fixed to the housing 10 and a slider accommodated in the case 40 slidably and non-rotatably. 41, a scale 42 attached to one end of the slider 41, one end of the slider 41 and the case
The compression spring 43 is interposed between the compression spring 43 and the other end of the slider 41 and constantly presses the other end of the slider 41 to the reflector 2.

The optical axis adjustment confirmation device 4 is the optical axis adjustment mechanism 3 described above.
The slider 41 slides as the reflector 2 rotates while the optical axis is being adjusted. That is, the slider
Since 41 is constantly pressed against the reflector 2 by the compression spring 43, when the reflector 2 rotates clockwise in the figure, the slider 41 projects from the case 40 in the direction of the solid line arrow in the figure by the spring force of the compression spring 43. When the reflector 2 rotates counterclockwise in the figure, the slider 41 enters the case 40 against the spring force of the compression spring 43 in the direction of the broken line arrow in the figure. In this way, the slide amount of the slider 41 is
The amount of adjustment of the optical axis is grasped by reading from the moving scale 42 of 41 and a fixed scale (not shown) attached to the case 40.

In the above example, the lamp body 1 is used as the mounting body.
Further, the reflector 2 is used as the adjusted body, but the mounting body may be the vehicle body and the adjusted body may be the lamp body.

[Problems to be Solved by the Invention] However, in the above-described conventional optical axis adjustment confirmation device, since the slider 41 is always in pressure contact with the reflector 2 by the compression spring 43, the load of the compression spring 43 slides on the reflector 2.
It is always applied via 41, and reflector 2
Is easily displaced. Further, the other end of the slider 41 is connected to the reflector 2
The other end of the slider 41 is easily worn due to vibration or shock because the slider 41 is constantly in pressure contact with.

As a result, there is a problem that it is difficult to obtain correct light distribution.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical axis adjustment confirmation device for a vehicle headlight that can always obtain a correct light distribution and can read the optical axis adjustment amount even in a dark place.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention attaches a support to an attachment, and slidably mounts one end of a light guide to the support and guides the guide. The other end of the optical body is fixed to the body to be adjusted, and the other end of the light guide is located on the light source side of the headlight, and the body to be adjusted is attached to one end of the support and the light guide. A reading unit for reading the amount of movement of the light guide body that moves with the rotation of as an adjustment amount is provided.

[Operation] With the above configuration, the present invention allows the light guide body to move as the body to be adjusted rotates, and the amount of movement of the light guide body can be read from the reading unit as the optical axis adjustment amount. At this time,
Since the other end of the light guide is fixed to the body to be adjusted, the other end of the slider is pressed against the body to be adjusted (reflector) by a compression spring. Therefore, there is no fear that the reflector is easily displaced and the other end of the slider is easily worn. Therefore, a correct light distribution can be obtained.

In particular, the present invention uses the light guide as a means for reading the adjustment amount. Therefore, when the light source of the headlight is turned on, the light is transmitted from the other end side to the one end side of the light guide. However, the adjustment amount can be read.

[Embodiment] An embodiment of an optical axis adjustment confirmation device in a vehicle headlamp according to the present invention will be described below with reference to FIGS. 1 to 3.

 In the figure, the same symbols as in FIG. 4 indicate the same components.

In the figure, reference numerals 14, 15 and 16 are a recess, a through hole, and an O-ring, which are provided in a portion of the housing 10 adjacent to the optical axis adjustment mechanism 4 for mounting and storing the optical axis adjustment confirmation device.

Reference numerals 22 and 23 are recesses and through holes for attaching the optical axis adjustment confirmation device, which are provided on the rear surface side of the reflecting surface 20 of the reflector 2 and adjacent to the optical axis adjusting mechanism 4, and 24 is a light collecting portion provided on the reflector 2. It is a through hole.

5 is a fixed case as a support, and this fixed case 5
Has a cylindrical shape, is provided with a screw hole 50 on the inner peripheral surface, and is provided with a flange portion 51 on the outer peripheral surface. This fixed case 5 is attached to the housing 10
It is fixed in the concave portion 14 of.

6 is an adjustment case as a support body.
Is made of transparent material and has a rod shape. This adjustment case 6
A slide hole 60 having one end closed and the other end open is provided in the axial direction. Further, a screw portion 61 is provided on the outer peripheral surface of substantially the middle portion of the adjusting case 6, and a marker 62 is provided on the outer peripheral surface of one end of the adjusting case 6 in the circumferential direction. The threaded portion 61 of the adjustment case 6 is screwed into the screw hole 50 of the fixed case 5 to be attached.

Reference numeral 7 denotes a light guide, which is made of, for example, an optical fiber and has a rod shape. When the scales 70 are provided on the outer peripheral surface of one end of the light guide body 7 at equal intervals in the circumferential direction, and the other end surface is fixed to the reflector 2, the reflecting surface 20 of the reflector 2 is fixed.
Is formed into a curved surface shape forming a part of. As the light guide body 7 of this optical fiber, one that does not change in length in the axial direction and is flexible in the radial direction is used.

In addition, the marker 62 at one end of the transparent adjustment case 6 is
The scale 70 at one end of the light guide body 7 constitutes a reading section.

Reference numeral 8 denotes a clip, and the clip 8 has a through hole 80 provided in the axial direction. Collar portion 81 for clamping and fixing on the outer peripheral surface of the clip 8.
And 82 are provided.

One end of the light guide 7 is provided with a slide hole 60 of the adjustment case 6.
Insert it slidably inside. On the other hand, the other end of the light guide 7 is inserted and fixed in the through hole 80 of the clip 8, and the clip 8 is fixed in the recess 22 and the through hole 23 of the reflector 2. As a result, the other end of the light guide 7 is fixed to the reflector 2 via the clip 8, and the other end face of the light guide is flush with the reflection surface 20 of the reflector 2.

Thus, when the headlamp equipped with the optical axis adjustment confirmation device of the present invention has been assembled to the vehicle body, the adjustment case 6 is rotated to move axially with respect to the fixed case 5, and the marker of the adjustment case 6 is moved. 62 and the reference scale of the light guide body 7, for example, the 0 scale (origin) are combined to perform the initial setting of the optical axis adjustment confirmation device of the present invention.

The optical axis adjustment confirmation device of the present invention in this embodiment has the above-mentioned configuration, and the optical axis adjustment mechanism 3 is operated to rotate the reflector 2 with respect to the housing 10 to perform the optical axis adjustment. Then, as the reflector 2 rotates, the light guide 7
Moves via the clip 8, and the movement amount of the light guide 7 is adjusted by the marker 62 of the adjustment case 6 and the scale 70 of the light guide 7.
Read as the optical axis adjustment amount. For example, 1 scale of the light guide 7
70 is 1.5 mm, and the turning angle of the reflector 2 at this time is 0.3
8 °

Since the other end of the light guide 7 as the adjustment amount reading means is fixed to the reflector 2 via the clip 8, the conventional optical axis adjustment confirmation in which the other end of the slider is pressed against the reflector by a compression spring There is no fear that the reflector is likely to be displaced and the other end of the light guide body 7 is easily worn because the load is constantly applied to the reflector as in the device. Therefore,
Correct light distribution can be obtained.

Particularly, in the present invention, since the optical fiber light guide 7 is used as a means for reading the adjustment amount, when the light source of the headlight is turned on, the light is read from the other end surface of the light guide 7 at one end. Since the scale 70 is transmitted to the section, the adjustment amount can be read even in a dark engine room or at night.

Further, since the above-mentioned optical fiber light guide body 7 is one that does not change in length in the axial direction and is flexible with respect to bending, the linear movement of the light guide body 7 with respect to the rotation locus of the reflector 2 is used. It can be done smoothly. That is, the linear movement of the light guide 7 can smoothly follow the rotational movement of the reflector 2.

In the above example, the lamp body 1 is used as the mounting body.
Further, the reflector 2 is used as the adjusted body, but the mounting body may be the vehicle body and the adjusted body may be the lamp body.

Further, in the above-mentioned embodiment, the clip 8 and the light guide body 7 are fixed separately, but they may be integrally formed.

Further, the fixing means of the light guide body 7 to the reflector 2 may be other than the clip 8 described above. For example, they are fixed by adhesion or fixed by a magnet.

[Advantages of the Invention] As is clear from the above, the optical axis adjustment confirmation device for the vehicle headlamp of the present invention fixes the other end of the light guide body as the adjustment amount reading means to the object to be adjusted. Like the conventional optical axis adjustment confirmation device in which the other end of the is pressed against the reflector (adjusted body) with a compression spring, the reflector is constantly loaded and the reflector is easily displaced, and the slider (light guide) There is no fear that the other end of the is easily worn.
Therefore, a correct light distribution can be obtained.

Particularly, in the present invention, since the light guide is used as a means for reading the adjustment amount, if the light source of the headlight is turned on,
Since the light is transmitted from the other end of the light guide to the reading section at one end, the adjustment amount can be read even in a dark place.

[Brief description of drawings]

1 to 3 show an embodiment of an optical axis adjustment confirmation device in a vehicle headlamp according to the present invention, and FIG. 1 is a cross section of a headlamp equipped with the optical axis adjustment confirmation device of the present invention. FIG. 2 is a partial perspective view of the optical axis adjustment confirmation device of the present invention, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a sectional view of a headlamp equipped with a conventional optical axis adjustment confirmation device. 1 …… Lamp body (mounting body), 10 …… Housing, 2 ……
Reflector, 3 ... Optical axis adjustment mechanism, 5 ... Fixed case (support), 6 ... Adjustment case (support), 62 ... Marker, 7 ... Light guide, 70 ... Scale, 8 ... clip.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G02B 6/00

Claims (1)

[Scope of utility model registration request] 1. A mounting body, an adjusted body rotatably mounted on the mounting body, and an optical axis adjusting mechanism mounted on the adjusting body and the mounting body, and the optical axis adjusting mechanism is operated. By doing so, in the vehicle headlamp in which the body to be adjusted is rotated with respect to the mounting body and the optical axis is adjusted, a support body mounted to the mounting body and one end portion of the support body A light guide body that is slidably mounted, has the other end fixed to the body to be adjusted, and has the other end positioned on the light source side, and transmits light from the light source from the other end side to the one end side. An automobile provided with one end of the support and the light guide, and a reading unit for reading a movement amount of the light guide that moves with the rotation of the adjusted body as an adjustment amount. Optical axis adjustment confirmation device for headlamps.