| 摘要 |
A training device for hitting a ball includes a spiral pipe and a base. The spiral pipe is composed of a plurality of dual-awl ring members connected together to form an adjustable pipe. The spiral pipe includes a top pipe at an upper end thereof to connect with a socket, a bottom pipe and a positioning sleeve at a lower end thereof to connect with a through hole and a stepped hole of the base. The base is in the shape of a home plate. The base has the through hole at a central portion thereof and the stepped trough underneath the through hole. The base includes at least two plates having relative connecting surfaces which are formed with notches and protrusions to engage with each other. The protrusions are engaged with the notches for assembling the two plates to become one-piece. The bottom pipe is inserted in the through hole with the first stop ring to be blocked on the through hole. The positioning sleeve is inserted in the stepped trough with the second stop ring being secured in the stepped trough. The first stop ring and the second stop ring are secured in the middle of the base such that the spiral pipe is mounted on the base. The socket is fitted on the top pipe to complete the assembly of the present invention.
|
