Angle adjuster for vehicle seats

The utility model discloses an angle adjuster for vehicle seats. The angle adjuster comprises a base and a backrest with the lower end portion hinged with the base, an angle adjusting mechanism is arranged between the base and the backrest and comprises a locking portion arranged on the backrest and lock teeth arranged rotatably arranged on the base, a plurality of toothed grooves are arranged in the inner ring of the locking portion, the lock teeth are matched with the toothed grooves, a driving mechanism is arranged on the base, the driving mechanism comprise an operating piece with one end rotatably arranged with the base, a connecting piece with one end hinged with the operating piece and a driving piece with one end hinged with the other end of the connecting piece, a driving shaft is fixedly connected at the other end of the driving piece and is fixedly connected with the lock teeth, and the connecting portion of the connecting piece and the operating pieces deviates the connecting portion of the operating piece and the base. A linkage mechanism is formed by the operating piece, the connecting piece and the driving piece, the angle adjusting mechanism between the base and the backrest is driven through deformation of the linkage mechanism, labor-saving adjustment is achieved, operating space is small, and adjusting space can be saved.