Interchangeable Trigger Assembly for Firearms

Abstract

An interchangeable trigger assembly for firearms, including a containment structure which can be inserted in the body of the firearm through an opening; the containment structure includes one or more triggers, one or more firing pins, a firing pin actuation mechanism, a firearm safety catch system, and a means for locking temporarily the containment structure inside the firearm body.

1 . An interchangeable trigger assembly for firearms, including a containment structure which can be inserted in the firearm body through an opening, wherein said containment structure comprises one or more triggers, one or more firing pins, an actuation mechanism for said one or more firing pins, a firearm safety system, and a means for temporarily locking said containment structure inside said firearm body. 
     
     
         2 . The trigger assembly according to  claim 1 , further comprising at least two firing pins and a selector device adapted to select the first shot to be fired by means of a first firing pin; said selector device comprising an external control which can be actuated by the user; said selector device and said external control being contained in said containment structure. 
     
     
         3 . The trigger assembly according to  claim 1 , configured for application to a single- or multi-barreled rifle. 
     
     
         4 . The trigger assembly according to  claim 3 , further comprising a secondary safety catch adapted to prevent the operation of said firing pins when a handle is open. 
     
     
         5 . The trigger assembly according to  claim 3 , further comprising a device for the automatic actuation of said firearm safety system, which is activated when a system for cocking the firing pins is actuated. 
     
     
         6 . The trigger assembly according to  claim 1 , further comprising two firing pins, an upper firing pin and a lower firing pin respectively, which are actuated by a single trigger by means of a selector device; a system for actuating said firing pins, which comprises said trigger, which is constituted by a finger grip associated with a trigger body pivoted on a pivot which is integral with said casing; said trigger body oscillates in contrast with a spring and has a rear end part; said rear end part engages an oscillating member which is constituted by a fork which is joined to a cam adapted to actuate alternately a mechanism for actuating said lower firing pin or a mechanism for actuating said upper firing pin. 
     
     
         7 . The trigger assembly according to  claim 6 , wherein said cam is constituted by three functional portions: a central tooth and two lateral inclined planes; said central tooth is adapted to alternately engage a rear end of a lower trigger lever or a rear end of an upper trigger lever. 
     
     
         8 . The trigger assembly according to  claim 7 , wherein said trigger levers are laterally adjacent and pivoted to a common pivot; said common pivot supports a helical spring, the free ends of which act on said trigger levers in order to push them into a position for engagement with respective firing pin levers; said lower trigger lever acts on a lower firing pin trigger lever; said upper trigger lever acts on an upper firing pin trigger lever; said lower trigger lever has an end part which engages a tooth of said lower firing pin; said upper trigger lever has an end part which engages a tooth of said upper firing pin; said lower firing pin comprises a coaxial actuation spring which acts in contrast with a lower firing pin support and with a lower abutment of said lower firing pin; said upper firing pin has a coaxial actuation spring which acts in contrast with an upper firing pin support and with an upper abutment of said upper firing pin. 
     
     
         9 . The trigger assembly according to  claim 8 , further comprising a re-cocking plate which is arranged in front of said firing pins and acts by resting against said abutments of said firing pins; a cocking lever, acting on said re-cocking plate, is associated with a locking member, on which a handle acts which controls the opening of said firearm; said locking member is constituted by a vertical cylinder and comprises a pair of holes, respectively a lower hole, for the passage of said lower firing pin, and an upper hole, for the passage of said upper firing pin, when the firearm is in the closed position. 
     
     
         10 . The trigger assembly according to  claim 8 , further comprising a trigger selector device constituted by a rod; said rod has a lower end inserted in said fork of said oscillating member and an upper end which is associated with a button; said button is transversely movable in a slider; said slider is movable longitudinally in a block associated with an upper part of said containment structure; said button allows to make the lower end of said rod oscillate so as to move said fork and therefore said oscillating member to the right or to the left with respect to a central position, thus alternatively matching up said central tooth respectively with said rear end part of said lower trigger lever or with said rear end part of said upper trigger lever. 
     
     
         11 . The trigger assembly according to  claim 6 , characterized in that said firearm safety catch comprises a slider which can slide, with respect to a small block associated with said casing, between two positions: a firing position and a position in which the safety catch is engaged, said slider is associated with an angled end part; in a position in which the safety catch is engaged, said angled end part interferes with said rear end parts of said trigger levers, preventing their movement; in a firing position, which corresponds to said slider in the advanced position, said angled end part allows said rear end parts of said trigger levers to lift and thus operate said firing pins; a wire spring, which is interposed between said small block and said casing, engages a pivot of said angled end part so that the advanced position and the retracted position of said spider are rendered stable. 
     
     
         12 . The trigger assembly according to  claim 11 , further comprising a device for the automatic actuation of said firearm safety system, which is activated when a system for cocking the firing pins is actuated, wherein said automatic device for the actuation of said firearm safety catch comprises a safety catch control bar which has a rear end part associated with said angled end part and a free front end part on which a cam acts; said cam is associated with said handle and, when said handle is rotated, said cam pushes said bar, thus causing it to retract and accordingly moving backward said slider, which is thus moved to the safety catch engaged position. 
     
     
         13 . The trigger assembly according to  claim 1 , wherein said firing pin has a flexible structure. 
     
     
         14 . The trigger assembly according to  claim 1 , wherein said firing pin comprises a shank having a coaxial actuation spring; said shank comprising an abutment, at one end, and a tooth, at the other end; said abutment being hinged to a pin member. 
     
     
         15 . The trigger assembly according to  claim 9 , wherein said re-cocking plate actuates the opening of a barrel assembly hinged to said firearm body.