Paintball gun having internal pressure regulator

Abstract

A paintball gun having an internal pressure regulator is provided. The paintball gun includes a body, a launching tunnel, a rear lead shaft, the pressure regulator, and a back cover. A hollow barrel of the body allows the launching tunnel and the rear lead shaft to be accommodated successively therein. The pressure regulator is received in the rear lead shaft. The back cover is screwed to the body. Thereby, pressurized air coming from a gas cylinder is directly introduced to the pressure regulator so as for the paintball gun to dispense with any external air duct. Thus, the paintball gun poses no risk of duct burst and requires less assembling operation and fewer fixtures, thus reducing manufacturing costs.

What is claimed is: 
     
       1. A paintball gun having an internal pressure regulator, comprising:
 a body, including:
 a hollow barrel having a first chamber; 
 a first channel; 
 a second channel; and 
 a third channel; 
 wherein the second channel and the third channel communicate with the first chamber, and a retaining flange is provided so as for the retaining flange to be adjacent to the third channel; 
 
 a launching tunnel shaped as a hollow tube and having:
 one end defined as an intake end and an opposite end defined as an outlet end; and 
 a retainer circumferentially provided inside the launching tunnel and provided with a buffer ring and a first airtight ring; 
 wherein the launching tunnel is such received in the hollow barrel that the retainer is positioned between the second channel and the third channel of the first chamber; 
 
 a rear lead shaft disposed in the first chamber of the hollow barrel, including a first end and an opposing second end, and having:
 a piston block disposed at the first end and provided with a second airtight ring for being fittingly coupled with the intake end of the launching tunnel; and 
 a stepped tunnel provided at the second end of the rear lead shaft and having a fourth channel and a fifth channel, allowing the fourth channel to correspond in position to and communicate with the second channel of the first chamber in the body and the fifth channel to correspond in position to and communicate with the first channel of the first chamber in the body; 
 
 the pressure regulator disposed in the stepped tunnel of the rear lead shaft to abut against a stepped surface of the stepped tunnel; and 
 a back cover screwed to the body and centrally formed with a through hole. 
 
     
     
       2. The paintball gun of  claim 1 , wherein the pressure regulator comprises:
 a propping member, tube-shaped and tapered, abutting against the stepped surface of the stepped tunnel of the rear lead shaft and having a first stepped surface located between a third airtight ring and a fourth airtight ring both mounted around the propping member; 
 a sleeve having:
 a second stepped surface facing the first stepped surface of the propping member; 
 a second chamber formed centrally in the sleeve; 
 a first threaded hole; and 
 a sixth channel in communication with the second chamber and the fifth channel of the rear lead shaft; 
 
 a spring member disposed between the first stepped surface of the propping member and the second stepped surface of the sleeve; and 
 a screw member screwed into the first threaded hole of the sleeve and having:
 a second threaded hole for receiving a seal pad for closely abutting against the propping member; and 
 a fifth airtight ring partially embedded in the screw member. 
 
 
     
     
       3. The paintball gun of  claim 2 , wherein the spring member is a disc spring. 
     
     
       4. A paintball gun, comprising:
 a body comprising:
 a hollow barrel comprising:
 a first chamber; 
 a launching tunnel having an intake end and an outlet end, wherein the launching tunnel is in communication with the hollow barrel and in selective communication with the first chamber; 
 a rear shaft, including a first end and an opposing second end, and having a pressure regulator, wherein the first end of the rear shaft is distal from the outlet end of the launching tunnel, and 
 
   a grip comprising:
 a first connector for connecting to a source of pressurized gas; and 
 an internal channel in communication with the first connector and the body to allow pressurized gas to flow from the source of pressurized gas to the pressure regulator. 
   
     
     
       5. The paintball gun of claim 4, the body further comprising:
 a first opening in communication with a second chamber in the pressure regulator and the source of pressurized gas;   a second opening in selective communication with the first chamber and the second chamber;   a third opening in selective communication with the source of pressurized gas, wherein the first chamber is in communication with the launching tunnel during percussion, and wherein the third opening being in communication with the source of pressurized gas will cause the first chamber to not be in communication with the launching tunnel.   
     
     
       6. The paintball gun of claim 4 wherein the source of pressurized gas is a gas cylinder. 
     
     
       7. The paintball gun of claim 4 wherein the rear shaft comprises a stepped tunnel having a stepped surface and wherein the pressure regulator is disposed in the stepped tunnel. 
     
     
       8. The paintball gun of claim 7 wherein the pressure regulator abuts against the stepped surface of the stepped tunnel. 
     
     
       9. The paintball gun of claim 4 wherein the pressure regulator comprises a member configured to allow a user to adjust the capacity of the regulator. 
     
     
       10. The paintball gun of claim 9 wherein the member configured to allow a user to adjust the capacity of the regulator comprises a screw member. 
     
     
       11. The paintball gun of claim 9 wherein the body further comprises a back cover, wherein the back cover comprises a through hole for a user to adjust the capacity of the internal pressure regulator. 
     
     
       12. The paintball gun of claim 11 wherein the back cover is selectively removable. 
     
     
       13. A paintball gun, comprising:
 a body comprising:
 a rear shaft, including a first end and an opposing second end, and having a pressure regulator, 
 a launching tunnel having an intake end and an outlet end, wherein the launching tunnel is in selective communication with the pressure regulator, wherein the first end of the rear shaft is distal from the outlet end of the launching tunnel, 
 a first opening in communication with the pressure regulator and a source of pressurized gas, 
 a second opening in selective communication with the launching tunnel and the pressure regulator, and 
 a third opening in selective communication with the source of pressurized gas, wherein the pressure regulator is in communication with the launching tunnel during percussion, and wherein the third opening being in communication with the source of pressurized gas will cause pressure regulator to not be in communication with the launching tunnel; and 
   a grip comprising:
 a first connector for connecting to the source of pressurized gas, and 
 an internal channel in communication with the first connector and the body to allow pressurized gas to flow from the source of pressurized gas to the pressure regulator. 
   
     
     
       14. The paintball gun of claim 13 wherein the source of pressurized gas is a gas cylinder. 
     
     
       15. The paintball gun of claim 13 wherein the rear shaft comprises a stepped tunnel having a stepped surface and wherein the pressure regulator is disposed in the stepped tunnel. 
     
     
       16. The paintball gun of claim 15 wherein the pressure regulator abuts against the stepped surface of the stepped tunnel. 
     
     
       17. The paintball gun of claim 13 wherein the pressure regulator comprises a member configured to allow a user to adjust the capacity of the regulator. 
     
     
       18. The paintball gun of claim 17 wherein the member configured to allow a user to adjust the capacity of the regulator comprises a screw member. 
     
     
       19. The paintball gun of claim 17 wherein the body further comprises a back cover, wherein the back cover comprises a through hole for a user to adjust the capacity of the internal pressure regulator. 
     
     
       20. The paintball gun of claim 19 wherein the back cover is selectively removable.