Patent ID: 8485922

Claim:
A fixing structure for a batting practice apparatus including a ball holder, the fixing structure comprising: a monolithic sheath tube having compressible resilience and comprising a first segment and a second segment connected to each other, said second segment having a trumpet shape, said second segment further including a first conic wall and a second conic wall having different conic angles, said first conic wall is connected to said first segment and said first conic wall has a conic angle greater than a conic angle of said second conic wall, an outer wall of said first conic wall including a protruding stuck edge located near a junction between said first conic wall and said second conic wall, said stuck edge is distributed in a ring shape around an outer wall of said second segment, said stuck edge forming a conic surface expanding outward from an outer side of said first conic wall, said stuck edge having a flat bottom, and said stuck edge and said sheath tube are of a monolithic structure; and said batting practice apparatus having a base plate having an installation hole, the installation hole having a diameter between a maximum outer diameter and a minimum outer diameter of said trumpet shape of the second segment, wherein said first segment has a round tube shape for placing said ball holder, wherein when assembled, said second segment is compressed into said installation hole for tight engagement so as to fix said sheath tube to said base plate.