Patent ID: 8146778

Claim:
A ball feeding device comprising, in combination: a mounting seat adapted to be connected to a pitching machine and including a top plate, with a driving device mounted in the mounting seat and including a driving shaft extending in a vertical direction and defining an axis of rotation, with the mounting seat further including a discharge hole extending from an upper face of the top plate through the top plate in the vertical direction, with the discharge hole spaced from the driving shaft in a radial direction perpendicular the vertical direction, with the mounting seat further including a guiding wall formed on the upper face of the top plate and surrounding the axis of rotation, with the guiding wall including an arcuate segment with an opening facing the discharge hole, with the guiding wall further including a recessed segment located in the arcuate segment and facing the discharge hole, with the recessed segment including a first end connected to the arcuate segment and a second end, with a spacing from the second end of the recessed segment to the axis of rotation in the radial direction being smaller than that from the arcuate segment to the axis of rotation in the radial direction, with the guiding wall further including a guiding segment connected between the second end of the recessed segment and the arcuate segment; a rotary unit rotatably mounted on the top plate of the mounting seat, with the rotary unit including an engaging portion engaged to the driving shaft of the driving device to rotate therewith, with the rotary unit further including a plurality of tubes arranged around the engaging portion of the rotary unit and surrounding the axis of rotation, with each of the plurality of tubes receiving at least a ball, with each of the plurality of tubes including lower and upper ends spaced in the vertical direction; and a plurality of blocking members each pivotably connected to an interior wall of an associated tube, with each of the plurality of blocking members being pivotable relative to the rotary unit between a first position holding the ball in the associate tube and a second position releasing the ball in the associate tube, with each of the plurality of blocking members including a lower arm abutting on the guiding wall of the mounting seat, with the lower arm of each of the plurality of blocking members abutting against the arcuate segment of the guiding wall when the blocking member is in the first position, with the lower arm of each of the plurality of blocking members abutting against the recessed segment of the guiding wall when the blocking member is in the second position; wherein when the rotary unit is rotated, the lower ends of the plurality of tubes align with the discharge hole of the mounting seat in sequence so that the balls held by the blocking members fall into the pitching machine one by one from the discharge hole of the mounting seat.