Automatic Table Tennis Server

Abstract

This invention relates to a unique design of an automatic table tennis server that can automatically eject table tennis balls in such a way that each successively ejected ball carries different spin, such as top-spin, any combination of top-spin and side-spin, side-spin, any combination of under-spin and side-spin, as well as under-spin. The automatic table tennis server provided in this invention can effectively improve the skills of a table tennis player in mastering various types of spins. The automatic table tennis server presented in this invention is simple in mechanical design, simple in electronic control and inexpensive in product manufacturing.

1 . An automatic table tennis server capable of automatically ejecting the table tennis balls in such a way that each successively ejected table tennis ball carries different spin, such as top-spin, any combination of top-spin and side-spin, side-spin, any combination of under-spin and side-spin, as well as under-spin without the need to use computer programs and computer control.  
   
   
       2 . The automatic table tennis server of  claim 1  including a rotatable chamber being equipped with at least one limit or toggle switch and/or at least one proximity sensor, functioning as automatic reverse of the rotational direction of a motorized gear/belt driving system that drives the said rotatable chamber.  
   
   
       3 . The automatic table tennis server of  claim 2  wherein the said rotatable chamber, either in the form of a single component or an entity from assembly or joining of multiple parts, with its front-end portion being shaped like a slotted rectangular tube, or any slotted elliptical/polygonal tube, to allow a secure mount of a motorized wheel and a rubber pad, functioning as ball ejection; and with its rest portion being shaped like a hollowed round tube, functioning both as a shaft driven by said motorized gear/belt driving system and as a ball passageway to reach the said front-end portion where the ball shall be ejected.