Down lamp

Abstract

The invention discloses a down lamp. The down lamp comprises a rear cover, a front ring, a light transmitting plate, a light source plate, a power supply device and a supporting piece, wherein the rear cover is a shell structure with an opening in the bottom surface; a through hole is formed in the middle of the front ring; the light transmitting plate is arranged in the through hole of the front ring; the front ring covers the opening of the rear cover to form an assembling chamber; the light source plate and the power supply device are arranged in the assembling chamber and are electrically connected with each other; the supporting piece is positioned in the assembling chamber and is connected with the front ring; the supporting piece is not in contact with the side wall and the top surface of the rear cover; the light source plate is mounted on the supporting piece, is close to the front ring and is not in contact with the rear cover; and heat of the light source plate can be transmitted to the front ring through the supporting piece and is dissipated to the atmosphere via the front ring. The supporting piece and the light source plate are not in contact with the side wall and the top surface of the rear cover, the heat can be dissipated into the atmosphere through the supporting piece and the front ring, the heat is prevented from being transmitted to the rear cover to a maximum degree, and therefore, the temperature of the rear cover is prevented from being over high.

Description

Technical field [0001] The invention relates to a downlight, in particular to a ceiling downlight. Background technique [0002] In order to improve the working performance of the downlight and prolong the working life of the downlight, it is usually necessary to design a heat dissipation structure for the downlight. The traditional heat dissipation method is to install the light source board on the bottom of the housing, and try to use the housing of the downlight (that is, the rear cover). ) To dissipate the heat of the light source plate. Later, someone added an air flow hole on the housing (that is, the back cover) of the downlight to accelerate the diffusion of heat inside the downlight, and further improve the heat dissipation speed of the downlight. [0003] However, some places and countries now require that the floor slab be filled with fireproof cotton, and the surface temperature of the downlight housing (that is, the back cover) must not exceed 80 degrees. In actual in...

AI Technical Summary

Problems solved by technology

In the actual installation and use, the fireproof cotton in the floor will wrap the downlight shell will greatly reduce the heat convection at the back of the downlight, and the temperature of the outer surface of the downlight shell will remain high, and it will not meet the relevant regulations, and there will be certain safety hazards

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