Light fixture

Abstract

The invention belongs to the technical field of illumination and provides a light fixture comprising a main housing cast by iron-sand, a light source, an aluminum base plate, a reflection cup for light condensation and a driving circuit plate controlling work states of the light source. The main housing is provided with an accommodating cavity having a forward opening; the light source is arranged on the aluminum base plate; the reflection cup covers the light source and is connected with the aluminum base plate; the aluminum base plate is disposed in the accommodating cavity; the light fixture further comprises a filling box having a filling cavity; the driving circuit plate is disposed in the filling cavity; solid silicon gel formed by condensation of liquid silicon gel is filled in the filling cavity; the driving circuit board is covered with the solid silicon gel; the filling box is disposed in the accommodating cavity of the main housing; the surface of the aluminum base plate is provided with copper foil; and the light source is arranged on the copper foil. The driving circuit board is covered with the solid silicon gel, so heat emitted by the driving circuit board can be drove away in time and driving circuit board burn due to excessively high temperature can be prevented; and heat of the light source can be quickly transmitted to the aluminum base plate via the copper foil, so burn of the light source due to excessive heat accumulation can be prevented.

Description

technical field [0001] The invention belongs to the technical field of illumination, and in particular relates to a lamp. Background technique [0002] Due to the harsh road environment in coal mines, metallurgy and other occasions, the locomotives working in these occasions suffer from high vibration frequencies and large amplitudes, and the lamps installed on the locomotives are also affected by these vibrations. Therefore, the lamps on the locomotive must use It is made of vibration-absorbing materials to ensure that it will not be damaged due to excessive vibration. [0003] Cast iron is a cast iron-based alloy with a carbon content greater than 2%, which also contains silicon and a small amount of manganese, phosphorus, sulfur and other elements. It has the advantages of good vibration-absorbing ability, low melting point, good fluidity, simple melting, low cost, and wear resistance. Therefore, those skilled in the art use cast iron to cast lamp shells, end covers and ...

AI Technical Summary

Problems solved by technology

However, on the one hand, due to the technical characteristics of sand casting, the surface of the molded lamp housing or end cover is rough, and structures such as heat sinks cannot be provided; on the other hand, due to the poor thermal conductivity of cast iron materials, it is not possible to place The heat of the lamp is dissipated to the outside in time, causing the internal temperature of the lamp to be too high, which affects the normal operation of its internal components and shortens the service life

In short, the existing cast-iron sand-cast lamp shell improves the anti-vibration ability, but reduces the heat dissipation ability

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