Laser Sight Firing Device Mountable To An Air Gun

Abstract

A laser sight firing device is usable with an air gun, and includes a firing unit disposed on the gun barrel, a sensing unit, and a light emitter disposed on the firing unit. The firing unit includes a tubular member, and a position-limiting member extending from the tubular member. The tubular member has a tube wall formed with an air discharge hole and defining a passage. The sensing unit includes a piston disposed in the passage, a return mechanism disposed between the piston and the position-limiting member, a first chip module disposed on the piston, and a second chip module disposed fixedly in the passage. When air current flows from the air gun, the first chip module comes into contact with the second chip module to activate the light emitter to emit light.

I claim: 
     
         1 . A laser sight firing device adapted for use with an air gun, the air gun having a main body, a gun barrel connected to the main body, and a trigger unit connected to the main body and operable for driving emission of a high-pressure air current from the main body and through the gun barrel, the gun barrel having a muzzle disposed at an end thereof distal from the main body, said laser sight firing device comprising:
 a firing unit including a tubular member adapted to be disposed removably on the gun barrel of the air gun, said tubular member having a tube wall, a firing aperture disposed at an end of said tube wall distal from the muzzle of the air gun, and a passage defined by said tube wall and adapted to be disposed between said firing aperture and the muzzle, said tube wall having an air discharge hole formed therethrough, said firing unit further including a position-limiting member extending from an inner wall surface of said tube wall into said passage;   a sensing unit including a piston disposed movably in said passage and adapted to be disposed between said position-limiting member and the muzzle, a return mechanism connected between said piston and said position-limiting member, a first chip module disposed on said piston, and a second chip module disposed fixedly in said passage, aligned with said first chip module, and adapted to be disposed between said position-limiting member and the muzzle, said piston being movable relative to said position-limiting member between a non-contact position and a contact position, wherein, when said piston is disposed at the non-contact position, said first and second chip modules are spaced apart from each other, said piston being adapted to be driven by the high-pressure air current to move from the non-position to the contact position, so that the first chip module comes into contact with said second chip module to activate said second chip module to emit a sensing signal, and the high-pressure air current flows out of said passage through said air discharge hole, after which said return mechanism creates a restoration force to return said piston from the contact position to the non-contact position; and   a light emitter disposed on said tube wall of said tubular member for receiving the sensing signal from said second chip module to emit light.   
     
     
         2 . The laser sight firing device as claimed in  claim 1 , wherein said return mechanism is configured as a resilient member having two ends connected respectively to said position-limiting member and said piston. 
     
     
         3 . The laser sight firing device as claimed in  claim 1 , wherein said return mechanism includes two magnetic members disposed respectively on said position-limiting member and said piston for repulsing magnetically each other. 
     
     
         4 . The laser sight firing device as claimed in  claim 1 , wherein said firing unit further includes a stop member disposed on said tube wall of said tubular member and adapted to be disposed between said piston and the muzzle for preventing collision between said piston and the muzzle. 
     
     
         5 . The laser sight firing device as claimed in  claim 4 , wherein said inner wall surface of said tube wall is formed with an annular groove, and said stop member is configured as a C-shaped ring received within said annular groove. 
     
     
         6 . The laser sight firing device as claimed in  claim 1 , wherein said tube wall of said tubular member further has a connecting section adapted to be adjacent to the muzzle and adapted to be connect with the gun barrel, said connecting section being adapted to be threaded to an end of the muzzle. 
     
     
         7 . The laser sight firing device as claimed in  claim 1 , wherein said tube wall of said tubular member further has a connecting section adapted to be adjacent to the muzzle and adapted to be connect with the gun barrel, said firing unit further including a high-strength magnet adapted to attract magnetically an end of the muzzle. 
     
     
         8 . The laser sight firing device as claimed in  claim 1 , wherein the sensing signal is transmitted from said second chip module to said light emitter in a wireless transmission manner. 
     
     
         9 . The laser sight firing device as claimed in  claim 1 , wherein said tube wall of said tubular member is formed with a plurality of guide holes in spatial communication with said passage. 
     
     
         10 . The laser sight firing device as claimed in  claim 1 , wherein said firing unit further includes a contact member extending from the inner wall surface of said tube wall of said tubular member into said passage and adapted to be disposed between said position-limiting member and the muzzle, said second chip module being disposed on said contact member. 
     
     
         11 . The laser sight firing device as claimed in  claim 1 , wherein said second chip module is disposed on said position-limiting member.