CEILING SURFACE-MOUNTED LAMP FITTING DEVICE

摘要

PURPOSE:To simply fit a luminaire main body not to be undesirably rotated on a ceiling surface without using a tool. CONSTITUTION:A doughnut-like luminaire main body 1 is provided with a slidable slide member 10, a spring 11 moving the slide member 10 in one direction, and multiple staircase sections 12 on the slide member 10. A tread 12A corresponding to the staircase sections 12 in height is coupled with the upper face of a support metal 21.