Table tennis bat with adjusting gravity mechanism

A table tennis bat with adjusting gravity mechanism comprising:

• an adjusting gravity mechanism, which includes a hollow rectangular frame, a lead screw and a slider block;
• said slider block is a square-like block which center has a thread hole matched to said lead screw to be used as counterweigh when removed capably to vary the center of gravity of table tennis bat;
• said lead screw is provided to have said slider block be installed on its shaft, and on the surface of one end of said lead screw a key slot is formed;
• and said hollow rectangular frame has a capacity to provide said lead screw and said slider block installed inside, and each ends of said hollow rectangular frame with a round hole capably passed through by said lead screw;
• a blade body, which has a handle part on which a rectangular hole is formed to be provided a space for said hollow rectangular frame of said adjusting gravity mechanism put in there;
• and on the front side end of said hand part with a middle recess which center is penetrated through a hole interconnected to said rectangular hole to provide said adjusting knob with flat key head to pass through said hole and extend out;
• a lower handgrip part, which has a flat surface with identical appearance to that of said handle part of said blade body and on which said flat surface a rectangular recess relative to said rectangular hole of said blade body is formed;
• and on the end of said lower handgrip part is also provided with a lower arc recess;
• an upper handgrip part, which structure generally symmetrical to that of said lower handgrip also has a flat surface, a rectangular recess inside relative to said rectangular hole of said blade body, and an upper arc recess;
• and on the surface opposite to said flat surface of said upper handgrip part is provided with a recess to provide a glass installed thereon;
• an adjusting knob, which is a key head bolt with round shaft whose end is formed flat key head, and said adjusting knob with its flat key head is to be passed through and extended out of said hole of said blade body and to be inserted into said key slot of said lead screw of said adjusting gravity mechanism and then by pin jointing connected together;
• and
• a glass, which is installed on said recess of said upper handgrip part so that distance of displacement of said slider block removed is obviously observed.