City is signal lamp for security protection

The utility model discloses a city is signal lamp for security protection, including the mobile jib, the mobile jib is hollow structure, and the opening with inside intercommunication is seted up to the upper end of mobile jib, the mobile jib internal rotation is connected with the lead screw, be equipped with screw -nut on the lead screw, be connected with the connecting rod on screw -nut's the lateral wall, the other end of connecting rod is connected with the lamp body, it cup joints a bevel gear on the lateral wall of mobile jib lead screw to lie in, the lateral wall of mobile jib rotatesand is connected with the dwang, outwards extend at the both ends of dwang, it is connected with the 2nd bevel gear with a bevel gear engaged with to lie in the rotation of mobile jib internal rotation pole, the mobile jib is near being connected with annular anti -collision ring on the lateral wall of bottom position, anti -collision ring includes a plurality of equidistance and is the crash barthat the annular distribut