Cut-off mechanism including a strip actuated by an electromagnet comprising two air-gaps

An electromagnet and air gap technology, which is applied in the field of motor vehicle headlights and lighting headlights, can solve the problems of large electromagnets, expensive, undesired price and size, and achieve the effect of size reduction
CN107002971AActive Publication Date: 2017-08-01AML SYST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AML SYST
Publication Date
2017-08-01

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Abstract

Cut-off mechanism for an automotive vehicle headlamp comprising a strip (5) borne by a movable assembly (40) and shaped to block to a greater or lesser extent a light beam so as to change the optical operating mode of said headlamp, said mechanism furthermore comprising a motor (6) for actuating said movable assembly using an electromagnet including an inductive coil (61) associated with a fixed ferromagnetic core (62) positioned in its centre and with a metal carcass (64) surrounding said coil, said movable assembly being movable under the action of said electromagnet, against the action of a return spring, between a contact position and a distant position, via a first air-gap (h1) of said ferromagnetic core (62). Said movable assembly (40) is shaped to create a rupture in the continuity of the magnetic circuit formed by said ferromagnetic core (62), said metal carcass (64) and said movable assembly (40), when it makes contact with said ferromagnetic core (62).
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Description

technical field

[0001] The field of the invention is that of illuminated headlamps, more particularly of headlamps for motor vehicles. Background technique

[0002] Motor vehicle headlamps generally comprise a reflector in which a light source and means for controlling the shape of the light beam are positioned in order to adapt the reflector to the driving situation.

[0003] It is known to employ cut-off bands capable of blocking the beam at various stages. The belt is electrically actuated on command to move it between at least two angular positions, wherein the belt more or less blocks the light beam. This makes it possible to limit the range of the headlights to, for example, low beam headlights, known as the low beam position, without blinding drivers traveling in the opposite direction, or to what is known as the road position, The range of main beam headlamps in which there is no obscuration.

[0004] Prior art means for controlling the belt position generally con...

Claims

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