Rotary dimming mechanism

Abstract

The invention discloses a rotary dimming mechanism, which relates to the functional characteristic or a part an illuminating device or a system thereof, in particular to a rotary dimming mechanism for changing the characteristic and distribution of luminescence by adjusting a part. The rotary dimming mechanism comprises a light shielding column 1, a worm wheel 2, a worm 3 and a stepping motor 4, wherein the worm wheel 2 is fixedly connected to the shaft end of the light shielding column 1; the worm 3 is fixedly connected to a revolving shaft of the stepping motor 4; the stepping motor 4 is fixedly connected to a vehicle lamp shell 5 through a fixing bracket 7; the stepping motor 4 is in meshed transmission connection with the light shielding column 1 through the worm 3 and the worm wheel 2; the light shielding column 1 rotates around a rotating center thereof, and shows different section shapes on the light path of a vehicle lamp; and the light shielding column is designed with different specific section shapes at different rotating angles, so that a light shielding form which is consistent with far and near light requirements is formed. The rotary dimming mechanism disclosed by the invention has the advantages of stable dimming process, lose dimming action noise, self-locking function, higher reliability and capability of realizing dimming of multiple light forms.

Description

technical field [0001] The present invention relates to a functional feature or component of a lighting device or its system, in particular to a rotary dimming mechanism for changing the characteristics and distribution of luminous light by means of adjusting components. Background technique [0002] The existing far and low beam switching mechanism of the car lamp realizes dimming by controlling the position of the sun visor. Most dimming mechanisms use a solenoid valve as a control element, and the far and near light positions of the visor are switched through the expansion and contraction of the solenoid valve. [0003] Chinese utility model patent "automotive lamp with far and near beam switching mechanism" (utility model patent number: ZL200620070826.6 publication number: CN2890620) discloses an automotive lamp with a far and near beam switching mechanism, mainly including reflectors, light sources), accessories Optical lens, the reflector is equipped with a rear end b...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a rotary dimming mechanism with a stable dimming process and no electromagnetic valve noise, and a rotary shading column driven by a stepping motor worm gear to realize the change of the cut-off line and solve the problem of switching between the far and near beams of the existing car lights The mechanism dimming process and light shape are unstable, and the technical problem of high noise in dimming action

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