Tail cover mechanism of lighting lamp

The utility model provides a lighting lamp's tail cover mechanism, including body and lamp holder, one end of the body is provided with internal thread, one side inside the body is limited rotatingly equipped with the rotary plate, the inner side of the rotary plate is symmetrically fixed with the sealing mechanism, the sealing mechanism includes the fixed sleeve, when the body is installed, the fixed sleeve is fixed with the rotary plate, and the fixed sleeve is fixed with the rotary plate. The body can extrude a movable rod through a telescopic rod in the sealing mechanism, the movable rod drives a clamping block to extrude and fix a wire, the stability between the wire and the lamp holder can be improved, meanwhile, the telescopic rod slides in a fixing sleeve and compresses a telescopic rod spring, and a sealing plate seals the other end of the wire under the elastic force of a sealing plate spring; the sealing performance of the mechanism can be improved, the body is rotated, the movable plate can be ext