Car seat rear end collision active type safety headrest device

The utility model discloses a car seat rear end collision active type safety headrest device to solve the problem that response time is too long in the prior art. The active type safety headrest device comprises a headrest assembly, a trigger assembly and two pulling wires. The upper ends of the two pulling wires are fixedly connected with two metal blocks, the two metal blocks are inserted into through holes which are formed in the two metal block in a headrest box, and the lower ends of the two pulling wires are respectively fixedly connected with a lifting lug at the top end of a third trigger rack and a lifting lug at the top end of a second trigger rack in the trigger assembly. The headrest assembly comprises a headrest stepped shaft, a first headrest gear, a second headrest gear, a third headrest gear, a first headrest rack, a second headrest rack, a third headrest rack, the headrest box, metal blocks and a headrest moving plane. The trigger assembly comprises a trigger stepped shaft, a first trigger ge