JPH046108U

JPH046108U -

Info

Publication number: JPH046108U
Application number: JP4453890U
Authority: JP
Priority date: 1990-04-27
Filing date: 1990-04-27
Publication date: 1992-01-21
Anticipated expiration: 2005-04-27
Also published as: JPH083922Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る配光可変型前照灯のレン
ズ駆動機構の一実施例を示す一部切欠した側断面
図、第２図は同正面図、第３図は同Ｘ軸駆動機構
部を示す第２図における−線断面図、第４図
は同Ｙ軸駆動機構部を示す第２図における−
線断面図、第５図はレンズ駆動機構の駆動系の一
例を示すブロツク線図、第６図は本考案の原理及
び作用を示す説明図である。１…プロジエクタランプ、２…コリメータレン
ズ、４…エイミング軸、６…シリンドリカル凹レ
ンズ、７…レンズ駆動機構、８…移動レンズ、９
…Ｘ軸駆動機構部、１０…Ｙ軸駆動機構部、１１
…レンズキヤリア、１２…Ｙ螺子軸、１３…レン
ズマウント、１４…Ｙ軸ガイド、１５…Ｘ軸駆動
直流モータ、１６…ベアリングホルダ、１７…Ｘ
螺子軸、２０…Ｘ軸ポテンシヨメータ、２１…Ｙ
軸駆動直流モータ、２４…管軸、２７…スライド
軸、２８，２９…ベーベルギヤ、３０…Ｙ軸ポテ
ンシヨメータ、ＣＰＵ…駆動制御機構、Ｖ…車速
センサ、Ｔ…旋回角度センサ。 Fig. 1 is a partially cutaway side sectional view showing an embodiment of the lens drive mechanism of a variable light distribution headlamp according to the present invention, Fig. 2 is a front view of the same, and Fig. 3 is the same X-axis drive mechanism. FIG. 4 is a sectional view taken along the - line in FIG. 2 showing the Y-axis drive mechanism section, and FIG.
5 is a block diagram showing an example of a drive system of the lens drive mechanism, and FIG. 6 is an explanatory diagram showing the principle and operation of the present invention. DESCRIPTION OF SYMBOLS 1... Projector lamp, 2... Collimator lens, 4... Aiming axis, 6... Cylindrical concave lens, 7... Lens drive mechanism, 8... Moving lens, 9
...X-axis drive mechanism section, 10...Y-axis drive mechanism section, 11
...Lens carrier, 12...Y screw shaft, 13...Lens mount, 14...Y-axis guide, 15...X-axis drive DC motor, 16...Bearing holder, 17...X
Screw shaft, 20...X-axis potentiometer, 21...Y
Shaft drive DC motor, 24... tube shaft, 27... slide shaft, 28, 29... bevel gear, 30... Y-axis potentiometer, CPU... drive control mechanism, V... vehicle speed sensor, T... turning angle sensor.

Claims

[Claims for Utility Model Registration] A fixed lens and a movable lens are arranged on the front optical axis of a parallel light beam irradiation means consisting of a projector lamp, etc., and the movable lens is moved in the optical axis direction to control the convergence and diffusion of the light beam. In addition, in a variable light distribution headlamp that moves the optical axis of the movable lens parallel to the optical axis of the fixed lens to control the inclination of the luminous flux with respect to the optical axis, a lens carrier is arranged so that the movable lens is perpendicular to the optical axis. The lens carrier is fixed to a lens mount having one end screwed to a Y screw shaft installed on one side, and the lens carrier is slidable in the optical axis direction with respect to a Y axis guide fixed parallel to the optical axis. an X-axis drive mechanism, in which one end of the lens carrier is screwed to an X-screw shaft installed parallel to the optical axis, and is rotationally connected to the X-axis drive motor via an appropriate rotation transmission mechanism; A tube shaft is installed rotatably in parallel with the optical axis, and the tube shaft is movable in the axial direction with respect to the tube shaft.
and a Y-axis drive in which the tip of the rotatably connected slide shaft is rotatably connected to the Y screw shaft via an appropriate rotation transmission mechanism, and rotationally connected to the Y-axis drive motor via an appropriate rotation transmission mechanism. A lens drive mechanism for a variable light distribution headlamp, characterized in that the lens drive mechanism of a variable light distribution headlamp is independently driven and displaced in an optical axis direction and in a direction orthogonal to the optical axis, respectively, by means of a mechanism part.