In this state, even if the connecting bracket 150 is intended to be moved back upward, the connecting bracket 150 is difficult to separate because the fixing portions 141c are inserted and locked in the insertion grooves 175. In this process, even if larger force is applied to separate the connecting bracket 150, as described above, the bending portions 141b of the plate spring 141 having a predetermined radius distribute stress, so deformation is prevented and separation of the connecting bracket 150 can be prevented.

FIGS. 8A to 8D are views showing the sequence of separating the connecting bracket 150 from the fixing bracket 110 according to an embodiment of the disclosure.

Depending on cases, the communication equipment (200, see FIG. 3) can be separated from the fixing brackets 110. It may be required to separate the communication equipment (200, see FIG. 3) to replace or repair the communication equipment, and since this work is performed at a high position, it may be advantageous to be able separate the communication equipment without large force or a complicated disassembly process.

When the bolt 143 of the fixing assembly 140 according to an embodiment of the disclosure is loosened, the fixing portion 141c of the plate spring 141 can be easily pulled out of the insertion groove 175, so the connecting bracket 150 can be easily separated from the fixing bracket 110.