High beam and low beam switching apparatus

摘要

A light beam and low beam switching apparatus includes an anchor plate (11) with a mask plate (30) hinged on one side against a notch (13) which is formed on a upper end of the anchor plate (11) corresponding to a lighting element (72) and a drawing plate (50) coupling with a lower end of the mask plate (30) on one side directing towards a light penetrating cover (80) that has a coupling slot (52) in the middle portion to couple with a stem (24) of a solenoid valve (20). The mask plate (30) is pivotally coupled on hinge docks (15) located on the anchor plate (11) through an elastic latch member (40). Thereby the solenoid valve (20) can drive the drawing plate (50) to synchronously sway the mask plate (30) to change the size of the light source area. Switching operation is steadier and smoother, and loading of the elements can be reduced to enhance durability.