Paint ball gun driven by linear motor

Abstract

A paint ball gun includes a barrel connected with a handle and a drop hole and an aperture are defined through a wall of the barrel. Paint balls can be supplied into the barrel via the drop hole. A linear motor is located in the barrel and drives a retractable driving rod which is connected to a push unit located in the barrel. An inlet is defined through a wall of the push unit and the inlet is moved with the push unit between a first position and a second position, the inlet is moved to the first position where the aperture is sealed and the paint ball enters the barrel. When the inlet is moved to the second position, the inlet is in communication with the aperture so that the paint ball is pushed by pressurized air introduced into the barrel via the aperture and the inlet.

1 . A paint ball gun comprising:
 a barrel connected with a handle and a drop hole and an aperture defined through a wall of the barrel, the drop hole adapted to allow paint balls to drop into the barrel and the aperture adapted to introduce pressurized air into the barrel;   a linear motor located in the barrel and driving a retractable driving rod, and   a push unit located in the barrel and the driving rod connected to the push unit, an inlet defined through a wall of the push unit and the inlet being moved with the push unit between a first position and a second position,   the inlet moved away from the aperture at the first position and being in communication with the aperture at the second position.   
   
   
       2 . The paint ball gun as claimed in  claim 1 , wherein the push unit includes a body, a chamber and a push end which communicates with the chamber, the body is connected with the driving rod, the inlet communicates with the chamber. 
   
   
       3 . The paint ball gun as claimed in  claim 1 , wherein two O-rings are engaged with an inner periphery of the barrel and the aperture is located between the two O-rings. 
   
   
       4 . The paint ball gun as claimed in  claim 1 , wherein a hose is engaged with the aperture and a pressurized air bottle is connected with the hose. 
   
   
       5 . The paint ball gun as claimed in  claim 1 , wherein a trigger unit is connected to the handle, the trigger unit controls the linear motor to drive the driving rod to move frontward and then backward on one pull.