Patent ID: 7793644

Claim:
A paintball gun comprising: a barrel having an axial path defined therein and the path including a closed end and an opening in the other end, a bore connected with the opening, a paintball inlet communicating with the path, a first section and a second section defined in the path and located opposite to the opening, the second section having an inner diameter larger than that of the first section, a firing mechanism located in the first and second sections, a conjunction opening defined in the conjunction portion between the first and second sections, a stop shoulder defined in an end of the first section and located opposite to the conjunction opening, a storage space defined in a side of the path and a pressurized air source providing pressurized air to be stored in the storage space, the storage space communicating with the first and second sections, a handle connected to the barrel and having a trigger which activates the firing mechanism; the firing mechanism including a switch member, a control member and an inner part, the inner part located in the first section in the path and movable axially in the path, the inner part including an axial space which has one opening end communicating with the path and the other open end of the axial space communicates with the conjunction opening of the first section, a flange extending outward from the inner part and located beside the conjunction opening and having a first push surface facing the conjunction opening and a second push surface on the opposite side of the first push surface which is stopped by the stop shoulder of the first section, the first push surface having an area larger than that of the second push surface, the flange defining an annular space between an outer periphery of the inner part and an inner periphery of the first section, the annular space communicating with the storage space, the conjunction opening communicating with the storage space; the control member located in the second section of the path and movable axially in the path, the control member having a guide protrusion extending toward the axial space, the guide protrusion including an air guide end on one end to guide air into the axial space, the control member having an end surface facing the switch member and the other side of the end surface being a stop surface which seals or opens the conjunction opening, and the switch member fixed to the second section and facing the end surface of the control member, the switch member including an air path which has one end communicating with an end surface of the switch member, the end surface of the switch member facing the end surface of the control member and forming a first end, the other end of the air path communicating with the storage space and forming a second end, the air path controlling the first end to be opened or closed.