Firing apparatus for an airsoft gun

1. An apparatus for controlling the firing of an airsoft gun comprising, in combination:

a butt ( 1 ) including a chamber ( 10 );

a first line ( 13 ) including a first port ( 12 ) communicating with a high pressure air canister ( 60 ) releasably secured to an underside of the butt ( 1 ), and a second port ( 14 ) communicating with a rear section ( 15 ) of the chamber ( 10 );

a valve ( 4 ) disposed under the butt ( 1 ) and including a stem ( 41 ) and a third port ( 40 );

a second line ( 16 ) communicating with the first port ( 12 ) and the third port ( 40 );

a third line ( 42 ) communicating with the third port ( 40 ) and a fourth port ( 17 ) in the butt ( 1 );

a firing mechanism ( 2 ) disposed in the chamber ( 10 ) and including a sleeve ( 20 ) and a plunger ( 30 );

a trigger ( 3 ) operatively connected to the stem ( 41 );

an annular intermediate member ( 32 ) of the plunger ( 30 ) positioned in an intermediate cylinder ( 50 );

a stop member ( 5 ) disposed on an intermediate portion of the plunger ( 30 );

an annular fourth flange ( 33 ) disposed in a rear portion of the plunger ( 30 );

a rear annular first flange ( 21 ) of the sleeve ( 20 ) disposed on the intermediate cylinder ( 50 ) in the chamber ( 10 );

a first portion ( 191 ) and a second portion ( 192 ) adjacent to the first portion ( 191 ) disposed in the rear section ( 15 ) of the chamber ( 10 );

a push rod ( 24 ) disposed in a front portion of the chamber ( 10 ); and

a circular member ( 23 ) formed at a forward end of the sleeve ( 20 ) and releasably secured to the push rod ( 24 );

wherein in a pressurized air supplying operation:

pressurized air leaving the high pressure air canister ( 60 ) flows to the rear section ( 15 ) of the chamber ( 10 ) via the first line ( 14 ) and a forward section ( 18 ) of the chamber ( 10 ) via the second line ( 16 ), the third port ( 40 ), the third line ( 42 ), and the fourth port ( 17 ) respectively;

the rear annular first flange ( 21 ) of the sleeve ( 20 ) is pushed rearward by the pressurized air in the forward section ( 18 ) until being stopped by an annular second flange ( 51 ) in a rear end of the intermediate cylinder ( 50 );

the pressurized air flows to an annular third flange ( 31 ) of the plunger ( 30 ) to push the plunger ( 30 ) rearward via a fifth port ( 22 ) of the sleeve ( 20 ) and an orifice ( 52 ) of the intermediate cylinder ( 50 );

the pressurized air leaving the rear section ( 15 ) of the chamber ( 10 ) flows to an adjacent reservoir ( 150 );

the plunger ( 30 ) is stopped from moving rearward when the pressurized air reaches the intermediate member ( 32 ) of the plunger ( 30 ); and

a plastic pellet ( 6 ) is brought to a front end of the chamber ( 10 ); and

wherein in a firing operation:

a pressing of the trigger ( 3 ) pushes the stem ( 41 ) rearward to close the valve ( 4 ) and block the second line ( 16 ) so that a portion of the pressurized air in the chamber ( 10 ) and the pressurized air in the third line ( 42 ) exit the valve ( 4 ) via the third port ( 40 );

the pressurized air in the rear section ( 15 ) of the chamber ( 10 ) pushes the plunger ( 30 ) forward until the second port ( 14 ) is blocked by the first portion ( 191 );

the pressurized air in the reservoir ( 150 ) passes through a plurality of orifices ( 34 ) in the fourth flange ( 33 ) to reach a tunnel ( 35 ) in front of the plunger ( 30 );

the pressurized air enters a tunnel ( 53 ) in the intermediate cylinder ( 50 );

the pressurized air pushes both the push rod ( 24 ) and the sleeve ( 20 ) forward;

the plastic pellet ( 6 ) is pushed to a ready to fire position in front of the chamber ( 10 ) by the pressurized air passing through a space ( 25 ) around the push rod ( 24 ) and a plurality of holes ( 26 ) through the circular member ( 23 ); and

the pressurized air propels the plastic pellet ( 6 ) out of the butt ( 1 ) to fire.