Extractor mechanism

Abstract

The trigger mechanism for a firearm comprises a housing (1), a spring-loaded bolt (2) rotating about an axis (4), an intermediate bolt (5) mounted on its axis (7), and a trigger weight adjustment screw (13). The intermediate bolt (5) interacts with the spring-loaded bolt (2) and rotates under the action of a flexible element connected to the trigger weight adjustment screw (13). This flexible element is designed as an intermediate bolt spring (6) that limits the rotation of the intermediate bolt (5). The intermediate bolt spring (6) includes a plunger (9) connected to a pressure pin (10) such that the plunger (9) compresses the intermediate bolt spring (6) when the trigger force increases and decompresses it when the trigger force decreases. The push-button pin (10) acts on a trigger weight scale (11) with a display through a housing window (11.1).

Description

[0001] The claimed invention relates to the construction of firearms, in particular to trigger mechanisms for firearms with a sliding locking bolt, such as hunting rifles.

[0002] Generally, all existing trigger mechanisms can be divided into two types: those with a single-stage trigger and those with a two-stage trigger. The main difference between these two trigger types is that the shooter can initiate an immediate shot by pulling a single-stage trigger. Since the slightest movement of the trigger results in a shot, it is important that the trigger is properly adjusted.

[0003] The trigger mechanism described in German utility model DE 20 2015 101 485 U1, published on March 24, 2015, is known from the prior art and is considered the closest prior art. This trigger mechanism has an adjustable trigger with four trigger options. The adjustments are made using a hexagonal key. The recess into which the key is inserted rotates in four positions, thereby changing the pressure of the trigger spring.

[0004] The disadvantage of this known trigger mechanism is that, in order to change the trigger pull weight and to determine the size of the trigger pull weight, the trigger mechanism must be removed from the stock.

[0005] The trigger mechanism described in US patent 11,774,201 B2, published on October 3, 2023, is also known from the prior art. This trigger mechanism comprises a housing, a trigger, a rod, a trigger spring, and a control element. The trigger pull weight is adjusted by a guide element that engages in grooves in the housing and compresses or releases the trigger spring in three positions.

[0006] The disadvantage of this trigger mechanism lies in the fact that the trigger mechanism must be removed from the receiver in order to change the trigger pull weight and to obtain an indication of the size of the trigger pull weight.

[0007] Further state of the art regarding trigger mechanisms for firearms is revealed in WO 2021 / 107812 A1, DE 20 2010 015 584 U1, DE 10 2017 120 307 A1 and WO 2014 / 084757 A1.

[0008] The objective of the present invention is to increase the reliability and safety of the trigger mechanism and to simplify the function for adjusting its hardness and quality.

[0009] This objective is achieved by the trigger mechanism according to claim 1. The technical result of the claimed invention is thus achieved by the fact that the trigger mechanism of the firearm comprises a housing, a spring-loaded lug rotatable about an axis, a trigger weight adjustment screw, and a trigger. The trigger mechanism includes an intermediate lug that interacts with the spring-loaded lug and a rod and rotates under the influence of a flexible element connected to a trigger scale. The flexible element is designed as an intermediate lug spring. The intermediate lug spring includes a plunger connected to a pressure pin such that, with increasing trigger force, the plunger compresses the intermediate lug spring, and with decreasing trigger weight, it decompresses it; i.e., the intermediate lug is connected to the trigger scale by a spring (the intermediate lug spring), a plunger, and a pressure pin.

[0010] The shooter can visually check the correct trigger setting at any time. This feature allows the weapon to be used under various conditions, e.g., precision shooting, hunting, etc. The present invention thus solves the prior art technical problem of the lack of an accessible trigger weight indicator and an accessible trigger weight adjustment device.

[0011] The technical result is also facilitated by the fact that the spring-loaded stud is equipped with a locking mechanism that secures it in the counterpart of the intermediate stud.

[0012] The technical result is also aided by the fact that the spring-loaded stud is equipped with a nose that returns it to its starting position.

[0013] The technical result is also facilitated by the fact that the pressure pin is connected to an adjusting screw and moves in a groove in the housing.

[0014] The technical result is also facilitated by the fact that the connecting element between the intermediate stud and the intermediate stud spring is a pressure ball.

[0015] The technical result is also facilitated by the fact that the intermediate pawl spring contains a plunger connected to a pressure pin.

[0016] The technical result is also aided by the fact that the screw for adjusting the trigger weight acts on the pressure pin.

[0017] The technical result is also improved by the fact that the printing stylus rotates the trigger scale around its own axis.

[0018] The technical result is also facilitated by the fact that the trigger is connected to the intermediate tunnel via a rod-shaped connecting element.

[0019] The trigger mechanism comprises a housing, a spring-loaded sear (trigger sear) designed as a lever with a lug for forced return upon contact with the cocking mechanism, an intermediate sear with a compression spring, and a trigger weight scale for indicating the trigger pull weight. The spring-loaded sear is designed as a lever with a toothed hook that engages the intermediate sear via its mating toothed hook element. The spring-loaded intermediate sear has a tooth on its rear side, and upon impact when the rifle is dropped, the sear, bearing against the tooth, forces the intermediate sear into engagement with the sear.The trigger weight adjustment screw interacts with a pushrod that rotates the trigger weight scale around its own axis and simultaneously, via a plunger, compresses the intermediate bolt spring when the trigger pull force increases, and decompresses it when the trigger pull force decreases. The trigger is designed to contact a pin-shaped rod that, on the other side, interacts with the intermediate bolt.

[0020] The device's design features ensure reliability, safety, and ease of use. This is due to the trigger's top-mounted trigger pull weight scale, which indicates the required trigger force. The use of a rear tooth on the intermediate lug minimizes the risk of the lug dislodging upon drop. The risk of the mechanism jamming due to dirt, freezing, or spring breakage is also minimized, as the sear incorporates a return lug.

[0021] The essential features of the claimed invention are illustrated by the following figures: Fig. 1 : Longitudinal section through the trigger mechanism; Fig. 2 : Cross-section through the trigger mechanism; Fig. 3 Longitudinal section through the trigger mechanism in the middle of the trigger weight scale.

[0022] The trigger mechanism consists of: housing 1, lug 2, rear return lug 2.1, stop 2.2, engagement point with intermediate lug 2.3, lug spring 3, lug axle 4, intermediate lug 5, rear tooth 5.1, intermediate lug spring 6, intermediate lug axle 7, pressure ball 8, plunger 9, pressure pin 10, trigger weight scale 11, indicator window 11.1, trigger weight scale axle 12, trigger weight adjusting screw 13, rod 14, trigger 15, trigger lug 15.1, trigger spring 16, trigger axle 17. Operating principle of the trigger mechanism'

[0023] The housing 1 is fixed to the rifle and contains the moving elements of the trigger mechanism. In the free state of the trigger mechanism, the bolt 2 rotates around the bolt axis 4 under the action of the bolt spring 3 until the stop 2.2 contacts the housing 1. Should the bolt spring 3 be dirty, broken, or frozen, its force will be insufficient to automatically return the bolt 2 to its initial position, so the rear return lug 2.1 comes into play. During the longitudinal return movement, the cocking bolt (not shown in the illustration) presses against the rear return lug 2.1, rotating the bolt 2 clockwise until it reaches the engagement position with the intermediate bolt 5.

[0024] In the cocked position, the cocking bolt presses down on the lug 2. The lug 2 cannot rotate due to the force of the cocking bolt, as it is secured at the engagement point 2.3 by the intermediate lug 5. The intermediate lug 5 rotates about its own axis 7 and automatically assumes the engaged position under the action of the intermediate lug spring 6. The connecting element between the intermediate lug 5 and the flexible element in the form of the intermediate lug spring 6 is the pressure ball 8. At the other end of the intermediate lug spring 6 is a plunger 9, which is connected to the pressure pin 10. By moving the pressure pin 10 along the groove of the housing 1, the intermediate lug spring 6 is compressed or decompressed, thereby increasing or decreasing the trigger pull weight. The pressure pin 10 changes its position under the action of the trigger pull adjustment screw 13.At its other end, the pressure pin 10 engages the trigger weight scale 12, which rotates around the trigger confidence scale 12. The display window 11.1 is located on the top of the trigger weight scale 12.

[0025] When the trigger weight adjustment screw 13 is turned, the position of the trigger weight scale 12 changes, which changes the visible value of the trigger force on the display window 11.1.

[0026] A strong impact on the rifle causes the trigger components to rotate due to inertia, which could disengage the engagement between lug 2 and intermediate lug 5. This disengagement would result in the weapon being fired. To prevent this, intermediate lug 5 is equipped with a rear tooth 5.1, which, in the event of an inertial impact on lug 2, prevents intermediate lug 5 from rotating in the direction that would disengage it from lug 2.

[0027] The force exerted by the trigger 15 is transmitted via the trigger lug 15.1 to the intermediate lug 5 by means of the rod 14. The trigger is spring-loaded by the trigger spring 16 and rotates around the trigger axis 17.

Claims

1. Trigger mechanism for a firearm comprising a housing (1), a spring-loaded bolt (2) rotating about an axis (4), an intermediate bolt (5) mounted on its axis (7), and a trigger weight adjusting screw (13), characterized in that the intermediate bolt (5) interacts with the spring-loaded bolt (2) and rotates under the action of a flexible element connected to the trigger weight adjusting screw (13), which is designed as an intermediate bolt spring (6) limiting the rotation of the intermediate bolt (5), wherein the intermediate bolt spring (6) includes a plunger (9) connected to a pressure pin (10), and the pressure pin (10) acts on a trigger weight scale (11) with an indication through a housing window (11.1).

2. Trigger mechanism according to claim 1, characterized by the fact that the spring-loaded stud (2) has an engagement element to secure it in a counterpart of the intermediate stud (5).

3. Trigger mechanism according to claim 1, characterized by the fact that the spring-loaded stud (2) is provided with a nose that returns it to its starting position.

4. Trigger mechanism according to claim 1, characterized by the fact that the connecting element between the intermediate stud (5) and the intermediate stud spring (6) is a pressure ball (8).

5. Trigger mechanism according to claim 1, characterized by the fact that the screw for adjusting the trigger weight acts on the pressure pin (10).

6. Trigger mechanism according to claim 1, characterized by the fact that the intermediate tunnel (5) contains a rear tooth that interacts with the tunnel (2).

Images