Light guide light-leakage preventing structure for car lamp

Abstract

The invention relates to a light guide light-leakage preventing structure for a car lamp. The light guide light-leakage preventing structure comprises an LED light source, a light guide, bolts, a fixing sheet, a light guide mounting bracket and a light guide protecting plate, wherein a light guide fixing groove is formed in the light guide mounting bracket; the light guide protecting plate and the light guide mounting bracket are matched, cover the light guide fixing groove, are detachably connected together, and integrated to form a cavity of which the front and rear ends are open; the LED light source is enclosed by the rear opening of the cavity; the light source incidence end of the light guide is connected with the LED light source and fixed on the light guide mounting bracket; and the region, from the light source incidence end to the external free lighting end, of the light guide is enclosed by the cavity defined by the light guide protecting plate and the light guide mounting bracket. The light guide light-leakage preventing structure provided by the invention is simple and high in practicability, and has the advantage that through the reasonable combination of several light-leakage preventing structures, the free total reflection of light inside the light guide is guaranteed, unnecessary light emitting is reduced, and the uniformity of the light guide and the appearance quality of the car lamp are improved.

Description

technical field [0001] The invention relates to auto parts, in particular to a light guide light leakage preventing structure of a car lamp. Background technique [0002] With the continuous improvement of users' requirements for the appearance of automobiles, the shapes of automobile lamps are also changing, especially the use of light guides as light-emitting carriers is becoming more and more common. Light guides are widely used in automotive lamps due to their simple structure, small design space, and high degree of freedom in modeling. Such as figure 1 As shown, the current light guide structure usually adopts a round tube with a diameter of 6-10mm. The light guide is placed on the light guide mounting bracket 6, and the LED light source 3 is connected to the PCB board 2 on the heat dissipation aluminum bracket 1, and is arranged at the end of the light guide. The outer decorative ring presses the light guide, so that the light guide can shine freely within the range ...

AI Technical Summary

Problems solved by technology

[0003] Due to the structural gap or assembly error between the light guide and each decorative ring in the existing light guide structure, unnecessary light is often emitted, and the leaked light directly affects the light guide lighting and the appearance of the lamp

Usually the initial position of the light guide is hidden inside the lamp, and the interior of the lamp does not belong to the design scope of the shape decoration circle, and there is often a lack of corresponding structure to block the light guide

Images