Transmission line crane short alarm device's anti -drop structure

The utility model relates to a transmission line crane short alarm device's anti -drop structure, specific saying so one kind is used for preventing that crane short alarm device from installing the back and structure not hard up or that drop appearing on the arm of crane, belongs to power supply unit technical field. It includes the drain pan, is equipped with two touch key on the short warning circuit board, and every touch key and a last guide pillar upper end compress tightly the contact, the housing is connected to drain pan upper end, and the housing is including with the cladding of short warning circuit board to packing force through the spring compresses tightly warning circuit board and housing fixed. The utility model has the advantages of simple and compact structure, rationally, it is easy and simple to handle, the reliable operation, can effectively detect transmission line crane short alarm device and whether appear not hard uply or drop, effectively avoid the emergence of incident, the cost is lower, can popularize and apply on a large scale.