JPH089844Y2 - Optical axis adjustment confirmation device for automobile headlights - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to an optical axis adjustment confirmation device for a vehicle headlight, in particular, a correct light distribution is always obtained, and a reading unit is set at an arbitrary position. The present invention relates to an optical axis adjustment confirmation device that can be used.

[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.

An object of the present invention is to provide an optical axis adjustment confirmation device for a vehicle headlight, which can always obtain a correct light distribution and can set a reading unit at an arbitrary position.

[Means for Solving the Problems] In order to solve the above problems, the present invention attaches one end of a bendable flexible tube to an attachment body, and attaches the other end of the flexible tube to a support body. A support is attached to the attachment, and an intermediate portion of a rod member that does not change in axial length and is made of a material that is flexible against bending is slidably inserted into the flexible tube. One end is slidably supported by the support, and the other end of the rod member is fixed to the body to be adjusted. One end of the support and the rod member is rotated by the body to be adjusted. It is characterized in that a reading unit for reading the movement amount of the rod member that is moved as an adjustment amount is provided.

[Operation] With the above configuration, the present invention allows the rod member to move with the rotation of the body to be adjusted, and the movement amount of the rod member can be read from the reading unit as the optical axis adjustment amount. At this time, since the other end of the rod member 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. Since the load is always applied to the reflector, the reflector is easily displaced and the other end of the slider is not easily worn. Therefore, a correct light distribution can be obtained.

In particular, in the present invention, one end of the rod member and the reading portion of the support, and the other end of the rod member and the fixed portion of the body to be adjusted are inserted into the bendable flexible tube and the flexible tube. Since it is connected through the intermediate portion of the rod member that is flexible against the bending, the one end portion of the rod member and the reading portion of the support member are fixed to the other end portion of the rod member and the fixed portion of the adjusted body. It can be installed at any location on the mounting body.

[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. 5 indicate the same items.

In the figure, reference numerals 14, 15 and 16 are a recess, a through hole and an O-ring for mounting the optical axis adjustment confirming device, which are provided in the housing 10 adjacent to the optical axis adjusting mechanism 4. Reference numeral 17 denotes a mounting plate portion integrally provided at a substantially middle portion of the back portion of the housing 10.

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 with one end open and the other end closed, with a screw hole 50 provided on the inner peripheral surface from the open end to the closed end, and a through hole 51 provided at the center of the closed end, and further on the outer peripheral surface. Mounting plate
52 is integrated. The mounting plate portion 52 of the fixed case 5 is
It is fixed to the mounting plate portion 17 of the housing 10 with a screw 18.

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 threaded portion 61 is provided on the outer peripheral surface of the other end of the adjustment case 6, and a marker 62 is provided in the circumferential direction on the outer peripheral surface of the one end of the adjustment case 6. 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 rod member, 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 rod member 7 in the circumferential direction at equal intervals and the other end surface is fixed to the reflector 2, a curved surface shape forming a part of the reflecting surface 20 of the reflector 2. To form. The rod member 7 of this optical fiber has no change in axial length,
And use one that is flexible in the radial direction. The rod member 7 may be made of a steel wire or a soft resin in addition to the above-mentioned optical fiber.

In addition, the marker 62 at one end of the transparent adjustment case 6 is
The scale 70 at one end of the rod member 7 constitutes a reading unit.

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.

Reference numeral 9 denotes a flexible tube that can be bent, and is made of, for example, a wire tube (release of a camera or the like) or a resin tube. A mounting flange 90 is provided at one end of the flexible tube 9, and a double brim-shaped mounting portion 91 is provided at the other end of the flexible tube 9.

Reference numeral 92 is a flexible tube mounting member, and this mounting member 92 is formed by integrally projecting a tubular portion 95 at the center.

Thus, the mounting flange portion 90 at one end of the flexible tube 9 is attached to the O-ring 15 of the housing 10 and the tubular portion 95 of the mounting member 92.
One end of the flexible tube 9 is attached to the housing 10 of the attachment body by press-contacting the end surface of the flexible tube 9 and attaching the attachment member 92 to the recess 14 of the housing 10 with the screw 93 via the washer 94. .

On the other hand, the attachment portion 91 at the other end of the flexible tube 9 is attached to the through hole 51 of the fixed case 5.

Further, one end of the rod member 7 is slidably inserted into the slide hole 60 of the adjustment case 6. Further, the other end of the rod member 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 rod member 7 is fixed to the reflector 2 via the clip 8, and the other end surface of the rod member is flush with the reflecting surface 20 of the reflector 2.

As described above, when the headlamp equipped with the optical axis adjustment confirmation device of the present invention is assembled to the vehicle body, the adjustment case 6 is rotated to move the adjustment case 6 in the axial direction with respect to the fixed case 5, and the adjustment is performed. The marker 62 of the case 6 and the reference scale of the rod member 7, for example, the 0 scale, are combined to initialize 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 rod member 7 moves via the clip 8, and the movement amount of the rod member 7 is adjusted by the marker 62 of the adjustment case 6 and the scale of the rod member 7.
Read as 70 and the optical axis adjustment amount. For example, the scale 70 of the rod member 7 is 1.5 mm, and the turning angle of the reflector 2 at this time is 0.38 °.

Since the other end of the rod member 7 as the above-mentioned adjustment amount reading means is fixed to the reflector 2 via the clip 8, the conventional optical axis adjustment confirmation device in which the other end of the slider is pressed against the reflector by a compression spring. As described above, there is no fear that the load is constantly applied to the reflector, the reflector is easily displaced, and the other end of the rod member 7 is easily worn. Therefore, a correct light distribution can be obtained.

Particularly, in the present invention, one end of the rod member 7 and the reading portion of the fixed case 5 and the adjustment case 6, and the other end of the rod member 7 and the fixed portion of the housing 10 are
Since the flexible tube 9 that can be bent and the bending that is inserted into the flexible tube 9 are connected through the intermediate portion of the flexible rod member 7, the other end of the rod member 7 and the housing are connected.
The one end of the rod member 7 and the reading portion of the fixed case 5 and the adjustment case 6 are attached to the housing of the fixed portion 10
It can be installed in any of 10 locations.

Further, since the optical fiber rod member 7 is used as the adjustment amount reading means, if the light source of the headlight is turned on,
Since the light is transmitted from the other end surface of the rod member 7 to the scale 70 of the reading unit at one end, the adjustment amount can be read even in a dark engine room or at night.

Furthermore, since the rod member 7 of the optical fiber described above does not change in length in the axial direction and is flexible with respect to bending, smooth linear movement of the rod member 7 with respect to the rotation trajectory of the reflector 2 is performed. You can do it. That is, the linear movement of the rod member 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 rod member 7 are fixed separately,
They may be integrally formed.

Further, the means for fixing the rod member 7 to the reflector 2 may be something other than the clip 8 described above. For example, they are fixed by adhesion or fixed by a magnet.

[Effects of the Invention] As is apparent from the above, the optical axis adjustment confirmation device in the vehicle headlamp of the present invention fixes the other end of the rod member as the adjustment amount reading means to the object to be adjusted. Like a conventional optical axis adjustment confirmation device in which the other end is pressed against a reflector (object to be adjusted) by a compression spring, the reflector is easily loaded because the load is constantly applied to the reflector, and the slider (rod member) There is no fear that the end will be easily worn. Therefore, a correct light distribution can be obtained.

In particular, in the present invention, one end of the rod member and the reading portion of the support, and the other end of the rod member and the fixed portion of the body to be adjusted are inserted into the bendable flexible tube and the flexible tube. Since it is connected through the intermediate portion of the rod member that is flexible against the bending, the one end portion of the rod member and the reading portion of the support member are fixed to the other end portion of the rod member and the fixed portion of the adjusted body. It can be installed at any location on the mounting body.

[Brief description of drawings]

1 to 4 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, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a front view of a mounting member. FIG. 5 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 ... Rod member, 70 ... Scale, 8 ... Clip ,
9: Flexible tube.

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 to perform optical axis adjustment, a bendable flexible tube having one end mounted to the mounting body, The other end of the flexible tube is attached, and the support body attached to the attachment body is made of a material that does not change in axial length and is flexible against bending, and the middle portion slides in the flexible tube. Insertable and one end slidably mounted on the support,
Further, a rod member having the other end fixed to the body to be adjusted and one end of the support body and the rod member, and the amount of movement of the rod member that moves with the rotation of the body to be adjusted is an adjustment amount. An optical axis adjustment confirmation device for a vehicle headlight, comprising: