Universal percussion trigger mechanism for firearms

A universal percussion trigger mechanism comprising a trigger housing (22) with a magazine (1) made with a locking protrusion (2) interacting with the magazine latch (7);

• a safety catch (3), spring-loaded through the safety latch (4) with a safety latch spring (5), which is located in the trigger housing (22), and is configured to reciprocate;
• magazine latch (7), which is rotatable and spring-loaded via the magazine pusher (6) with the safety latch spring (5);
• a firing hammer (8), spring-loaded with a hammer spring (9), and fixed with a hammer locker (10) in the shutter housing (15), and made to reciprocate when the cocking piece is acted upon (17);
• a trigger bar (23), made with the sear (11), which, under the impact of the spring (12), has the possibility to make reciprocating motion in the trigger housing (22), inside which the single-shot sear (27) is located, and spring-loaded with the spring of the trigger mechanism (30);
• a spring (12) of the trigger bar, which is made with the possibility to compress and expand due to the adjusting screw (13), installed in the trigger housing (22) and fixed with a lock nut (14);
• a universal percussion mechanism (38), which is fixed in the receiver (20), and consists of a bracket for a universal percussion mechanism (16), cocking piece (17) with a cocking indicator mounted on the axis of the cocking piece (18), and mainsprings (19), where said cocking piece (17) is spring-loaded with mainsprings (19) and interacts with the bulge (33) of the lock frame (31), the sear (11) and the single-shot sear (27), which is characterized in that the safety catch (3) is made in the form of a rectangular rod (64), on the side of which a large slot (65) and a small slot (66) are made, designed to interact with the safety protrusion (85) of the trigger bar (23), in addition, a through triangular slot (67) is made on top of the said rectangular rod (64), and at the end of the rectangular rod (64) a protrusion (68) is made that interacts with the trigger housing (22), in addition, two slots (69) are made at the ends of the rectangular rod (64), and two spherical recesses (70) are made on the lower surface of the rectangular rod (64), interacting with the safety latch (4) spring-loaded through the safety latch spring (5), said safety latch (4) is made with a spherical head (71) having a cylindrical section (72) which passes into the axis (73) and ends with a cone (74);
• the magazine latch (7) is made with a washer (78), with a lever (79) and a slot (80), where in the center of the washer (78) a rod (81) is made, acting as the axis on which the magazine latch (7) swings in the trigger housing (22), with a locking protrusion (82) designed to interact with the locking protrusion (2) of the magazine (1), and between the washer (78) and the locking protrusion (82), a protrusion (83) is made, interacting with the magazine pusher (6), which is made with a cylindrical portion (75), extending into the washer (76), which passes into the axis (77), where between the cylindrical portion (72), safety latch (4) and cylindrical portion (75) of the magazine pusher (6) a gap (B4) is arranged;
• the cocking piece (17) is made with cylindrical protrusions (43) with a through hole (44), and consists of the base of the cocking piece (45), cocking piece percussion platform (46) interacting with the firing hammer (8) and a bulge (33) at the end of the lock frame (31), the cocking piece tail (47) and the cocking piece tip (48) interacting with the upper surface of the protrusion (97) of the sear (11) and the rear radius surface (109) of the single-shot sear (27), and on the cocking piece percussion platform (46) a damper platform (49) is made from on the bottom, interacting with the receiver (20), and on the cocking piece tip (48) a protrusion with the cock position platform (50) are made, interacting with the support platform (98) of the sear (11), and the protrusion with the platform (51) is made, interacting with the lower horizontal surface (107) of the single-shot sear (27), and in the lower portion the base of the cocking piece (45) a cocking indicator (52) is made in the form of a thin plate with a notched section (53) and a smooth section (54), and on the cocking piece tail (47) on the bottom, the protrusion (55) is made in front of the protrusion with the cock position platform (50), interacting with the protrusion (97) of the sear (11);
• the sear (11) comprises a bar (96), with a protrusion (97) made in front of it, a support platform (98) is made in the bottom of the protrusion (97), and a through hole (99) is made at the side of the sear (11), and the upper surface of the protrusion (97) is made in the form of a radius, in addition, a locking protrusion (100) is made on the rear wall of the bar (96) on the edge in the bottom;
• the single-shot sear (27) contains a square rod (103), on the rear portion of which a T-shaped protrusion is made, consisting of a sear section (104) and a sear rack (105), where a blind hole (106) is made inside the square rod (103) for the spring of the trigger mechanism (30);
• a bracket (16) of the universal percussion mechanism is made in the form of two plates (58) connected with a transverse plate (59) at an acute angle (d59) relative to the horizontal axis of the bracket (16), the holes (60) and hole (61) are made on the plates (58) of different diameters in which axis of the cocking piece (18) is mounted, made in the form of a cylinder (62) with a slot at the end (63);
• the trigger bar (23) is made with the trigger (84) with a safety protrusion (85) interacting with the safety catch (3), with a front protrusion (86) interacting with the trigger housing (22), and the base of the trigger (87) is connected with thrust (89), which passes into the bar (90), inside which a rectangular cavity (91) is made, designed for the single-shot sear (27), and the bar (90) is connected with the protrusion (92), which is connected with the rear protrusion (93), on which a removable sear (11) is put on;
• the multifunctional switch (28) contains a trapezoidal bar (110), the front end of the indicated trapezoidal bar (110) is made in the form of a rack (111), which interacts with the hook-shaped protrusion (32) of the lock frame (31), with a horizontal protrusion (112), which interacts with the receiver (20), and in the back of the trapezoidal bar (110) a T-shaped protrusion is made, consisting of a section of the sear (113) and the rack of the sear (105), and a blind hole (106) is made inside the trapezoidal bar (110) and the multifunction switch axis is installed (29) spring-loaded with the spring of the trigger mechanism (30) and on the rear bottom surface of the trapezoidal bar (110) the protrusion (114) is made acting as a lever of fire;
• the axis of the multifunctional switch (29) is made in the form of a conical section (116) with a spherical head (117), where said conical section (116) passes into the cylindrical portion (118), which passes into the cylindrical portion (119) with a smaller diameter, which ends with a chamfer (120).