Patent ID: 7886730

Claim:
An apparatus for detecting the position of the paintball of a paintball gun, comprising: a) a gun barrel internally having a push tube for firing the paintball from a firing area through a gun tube outward; b) a ball-falling tube positioned at one side of the firing area for the insertion of a paintball-feeding unit such that the paintballs in the paintball-feeding unit are delivered one after another to the firing area; c) a gun handle positioned at the bottom of the gun barrel, a trigger being disposed at the front side thereof, the trigger being electrically connected to a paintball-firing circuit for controlling the action of the push, the paintball-firing circuit being coupled to a battery for supplying power required by the paintball-firing circuit; and d) a high-pressure tank attached to the bottom of the gun barrel for supplying the power required by the push tube; wherein an induction plate responsive to electrostatic capacity is positioned at a corresponding side of the ball-falling tube within the firing area of the gun barrel, and the induction plate consists of a conductive terminal piece and equivalent electrostatic capacity, and an insulated body is interposed between the terminal piece and the gun barrel; and wherein an electrostatic capacity detection circuit is electrically coupled to the induction plate for detecting the change of the electrostatic capacity of the induction plate; moreover, the signal of the change of the electrostatic capacity is transmitted to the paintball-firing circuit for a reliable detection if the paintball accurately reaches the firing area such that the push tube may be actuated in accordance with this information.