Active headrest device of car seat

The utility model discloses an active headrest device of a car seat, which aims to solve the problem that a low-grade vehicle runs short of neck safeguard. The active headrest device of the car seat comprises a headrest support assembly, a triggering support assembly and a link gear assembly, wherein the headrest support assembly comprises a headrest inner plate, a headrest inner plate support, a pair of headrest rocking bars, a pair of headrest connecting parts, a headrest upper cross beam, a pair of slide shafts a and a pair of slide shafts b. The triggering support assembly comprises a triggering panel, a pair of triggering plate support arms, a pair of triggering rocking bars, a rocking bar connecting rod, a connecting rod sleeve, a pair of triggering mechanism connecting parts and a triggering mechanism upper cross beam. The link gear assembly comprises three steel wire buckles, three steel wire ropes and a wire splitter. Two steel wire buckles on which the steel wire ropes are mounted are sleeved on the