JPH0448047U

JPH0448047U -

Info

Publication number: JPH0448047U
Application number: JP9072390U
Authority: JP
Priority date: 1990-08-31
Filing date: 1990-08-31
Publication date: 1992-04-23
Anticipated expiration: 2005-05-17
Also published as: JPH0721409Y2

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案に係る誤動作防止
機能付き角度検出機構の一実施例を示し、第１図
は配線図、第２図は回転板付近を描いた説明図、
第３図Ａ〜Ｄはそれぞれ作動説明図である。第４
図は光軸調節の説明図、第５図は従来例の駆動機
構の説明図、第６図はその制御回路図である。７……前照灯、８……モータ、９ａ，９ｂ……
リレー、１０……ポテンシヨメータ、１１……ウ
インドコンパレータ、１２……回転板、１２ａ〜
１２ｅ……導電パターン、１３……接触電極、２
１……ＰＮＰトランジスタ、２２……ＮＰＮトラ
ンジスタ。 1 to 3 show an embodiment of the angle detection mechanism with malfunction prevention function according to the present invention, FIG. 1 is a wiring diagram, FIG. 2 is an explanatory diagram depicting the vicinity of the rotating plate,
FIGS. 3A to 3D are operation explanatory diagrams, respectively. Fourth
FIG. 5 is an explanatory diagram of optical axis adjustment, FIG. 5 is an explanatory diagram of a conventional drive mechanism, and FIG. 6 is a control circuit diagram thereof. 7... Headlight, 8... Motor, 9a, 9b...
Relay, 10... Potentiometer, 11... Window comparator, 12... Rotating plate, 12a~
12e... Conductive pattern, 13... Contact electrode, 2
1...PNP transistor, 22...NPN transistor.

Claims

[Claims for Utility Model Registration] An angle detection mechanism in which a partial voltage output voltage changes according to the vertical tilt angle of a headlight, the angle detection mechanism being used in conjunction with a switch means having a plurality of partial voltage output terminals. An angle detection mechanism that inputs a composite voltage of a voltage taken out from the switch means and a voltage taken out from the switch means to a window comparator and causes a motor for leveling the headlamp to move forward or backward through the relay means. It consists of a disk made of electrically insulating material that rotates as it tilts up and down, and on the disk, two large and small circles and a plurality of radial straight lines passing through the center of rotation are assumed, and two adjacent The conductive patterns along the arc of the large circle in the part sandwiched by the straight lines and the conductive patterns along the arc of the small circle in the part sandwiched by two adjacent straight lines are arranged alternately, and the conductive patterns are arranged in series. Each of the connection points of a large number of fixed resistors connected to the conductive pattern is connected to each of the conductive patterns, and the conductive pattern arranged in the linear direction is connected to the conductive pattern along the large circular arc and the small circular arc. A contact electrode is provided opposite to the conductive pattern along the small arc, and when the headlamp is tilted and the disc rotates, the contact electrode is always connected to the conductive pattern along the small arc and the large arc. When the contact electrode is electrically connected to at least one of the radial conductive patterns, and the contact electrode faces any of the radial straight lines, both the conductive pattern along the small arc and the conductive pattern along the large arc are connected. a PNP type transistor having a structure of contact and conduction, and having an emitter and a collector connected in the coil circuit of the relay means; and an emitter and a collector between the base of the PNP type transistor and the voltage extraction part of the switch means. An angle detection mechanism with a malfunction prevention function for an automobile headlamp illumination angle adjustment device, comprising: an NPN transistor whose collector is connected and whose base is connected to a power supply side.