Gun Bolt Assembly of Air-Soft Pistol

Abstract

A gun bolt assembly of air-soft pistol is disclosed to include an air cylinder, a slide carriage, a bridge member affixed to an inner rear side of the slide carriage, a piston affixed to the front side of the base of the bridge member and inserted through a rear opening of the air cylinder into the inside of the air cylinder, and a second spring positioned inside the air cylinder and the piston and axially connected between the air cylinder and the piston. Thus, the second spring will not fall off easily or wear quickly, allowing smooth displacement between the air cylinder and the piston without deviation from the accurate moving path.

What is claimed is: 
     
         1 . A gun bolt assembly of air-soft pistol, comprising:
 a slide carriage having a bridge member fixedly mounted in a rear side thereof, said bridge member comprising a base, two rails forwardly extended from two opposite lateral sides of said base, a piston fixedly mounted at a front side of said base, a fastening component fastened to a front side of said piston to lock a piston cushion to the front side of said piston; and   an air cylinder comprising an air inlet located at a bottom side thereof, an air outlet located at a front side thereof, a wad mounted therein at a rear side relative to said air outlet, a first spring mounted around a front side of said wad to support said wad inside said air cylinder, an opening located at a rear side thereof for the insertion of said piston into the inside of said air cylinder, and a second spring connected between said air cylinder and said slide carriage for enabling said air cylinder to be moved back and forth along said two rails within a limited range;   wherein said second spring has a front end thereof positioned inside said air cylinder and a rear end thereof inserted through said fastening component and said piston cushion and connected to an inside part of said piston.   
     
     
         2 . The gun bolt assembly of air-soft pistol as claimed in  claim 1 , wherein said air cylinder further comprises a locating pin transversely mounted therein; said piston has a plug mounted in a rear side thereof and held in place by said base of said bridge member; said second spring has the front end thereof connected to said locating pin and the rear end thereof connected to said plug. 
     
     
         3 . The gun bolt assembly of air-soft pistol as claimed in  claim 2 , wherein said piston comprises a front part and a rear part, said rear part comprising two screw holes longitudinally disposed therein at two opposite lateral sides and affixed to said base of said bridge member by two screw bolts; said fastening component is threaded into said front part to lock said piston cushion to said front part; said plug is plugged into said rear part. 
     
     
         4 . The gun bolt assembly of air-soft pistol as claimed in  claim 3 , wherein said rear part is relatively smaller than said front part; said bridge member further comprises two arched constraint flanges protruded from the front side of said base at different elevations and respectively abutted against opposing top and bottom sides of said rear part of said piston. 
     
     
         5 . The gun bolt assembly of air-soft pistol as claimed in  claim 4 , wherein said fastening component comprises a head, a shank backwardly extended from a rear side of said head, an outer thread spirally extended around the periphery of said shank, an axial hole axially cut through said head and said shank for the passing of said second spring, and a tool groove located on an opposing front side of said head.