Block-up device for computer hardware keyboard

The utility model discloses a heightening device for a computer hardware keyboard, which comprises a supporting base plate, the left end of the bottom of the supporting base plate is fixedly connected with two spline housings, the inner cavity of each spline housing is meshed with a spline rod, a rotating shaft is movably connected between the inner cavity of each spline rod and the middle end of the inner cavity of each spline housing, and the rotating shaft is fixedly connected with the supporting base plate. A spring is fixedly connected between the surface of the rotating shaft and the middle end of an inner cavity of the spline rod, and an adjusting supporting leg is fixedly connected to the side, away from the spline sleeve, of the surface of the spline rod. According to the heightening device for the computer hardware keyboard, under the action of mutual cooperation of the supporting base plate, the spline sleeves, the adjusting supporting legs, the spline rods, the rotating shafts and the springs, the