Seat headrest adjusting device

The utility model discloses a seat headrest adjusting device, and relates to the field of seats, the seat headrest adjusting device comprises a seat side plate, a driving assembly, a headrest and an angle adjusting assembly; the driving assembly is arranged at the top of the seat side plate and fixedly connected with the seat side plate, the driving assembly comprises a pair of driving motors and a pair of lead screws, and the lead screws are sleeved with the angle adjusting assembly; the angle adjusting assembly comprises a pair of connecting bases and a plurality of hinges of coupling shafts, the two ends of each connecting base are connected with the corresponding lead screws in a sleeved mode respectively, and the connecting bases are rotationally connected through the hinges. The headrest is installed on the hinge, when the distance between the connecting seats is changed, the bending and inclination angle of the hinge is changed, and the angle of the headrest is controlled to be adjusted. According to t