Back lid structure of track lamp

The utility model discloses a back lid structure of track lamp be provided with a pair of hump connection board and a plurality of louvre and connecting hole on the capping, the top of the connecting plate outside is provided with horizontal strengthening rib, the drill way border of louvre distributes alternately a plurality of bosss and links into an integrated entity with cover plate directly over the louvre, and the clearance between the boss communicates with each other with the louvre, it makes two connecting plates not fuse to be provided with the fracture on the strengthening rib, this scheme has not only changed louvre and external intercommunication direction, dustproof effect has been strengthened, the change of louvre and cover plate shape has also been increased simultaneously, appearance design for the product provides the change space, and the means through set up the fracture on the strengthening rib, it can stabilize inadequately to have solved the prior art existence, there is the sliding surface phenomenon to produce after long -term the use, the use angle that leads to a lamp section of thick bamboo can not keep the problem in of adjustment position.