CZ2020652A3 - Handgun with adjustable shoulder rest - Google Patents

Abstract

A handgun with an adjustable shoulder rest (7), which is mounted in the chassis (10) of the weapon by means of a pair of rods (5) slidably mounted in a guide (17). The current position of the arm support (7) is lockable by a locking mechanism, which comprises a transverse locking element (1), placed vertically adjustably under the pair of arms (5). Both opposite ends of the locking element (1) are guided in opposite corresponding vertical grooves (9) formed in the chassis (10) of the weapon. The locking element (1) is pressed by the spring (4) towards the rods (5). At least two pairs of corresponding recesses (2) for engaging the locking element (1) are formed at a distance on the underside of each of the rods (5). The locking element (1) can be manually extended from the recess (2) by means of the control button (12). The locking element (1) is mounted on the carrier (3). The carrier (3) is pivotally mounted in the chassis (10) of the weapon about an axis (6) which is arranged in a hole (8) in the chassis (10) of the weapon between the rods (5).

Description

Handgun with adjustable shoulder rest

Field of technology

The invention relates to a handgun with an adjustable shoulder rest which is mounted in the chassis of the weapon by means of a pair of rods slidably mounted in a guide, the current position of the shoulder rest being lockable by a locking mechanism comprising a transverse locking element mounted vertically displaceably below the pair of arms. both opposite ends of the locking element are guided in opposite corresponding vertical grooves formed in the chassis of the weapon and the locking element is pressed by a spring towards the rods, where at least two pairs of corresponding recesses for engaging the locking element and the locking element are formed at a distance on the underside of each rod; it can be manually ejected from the recess using the control button.

Prior art

Some small arms are equipped with a shoulder rest, the length of which can be adjusted. The main reason is the reduction in the dimensions of the weapon's structure, which makes it easier to carry, store or use. Setting different distances of the support from the trigger also allows you to take into account the size of the body, respectively. arm's length.

There are a number of known ways to deal with adjusting the length of the shoulder rest.

A number of known solutions use a tube which is hinged to the weapon. A smaller tube then slides into the tube, on which the shoulder rest itself is mounted.

A folding shoulder rest is known, for example, from US 10704848.

Other solutions use smaller side rails, which slide forward at the sides in the direction of firing in the event of a change in the length of the shoulder rest.

A retractable shoulder rest is known, for example, from DE 3130562, CN 111457786, US 2020200505, ES 2751696 or US 10527385.

WO 2019129645 discloses a modular stock for a firearm, wherein the modular stock comprises a front stock, an intermediate stock portion and a stock, and wherein the stock plate is attached to the stock by a first adjusting device and the face is mounted on the stock by a second adjusting device. the adjusting device comprises a first locking and releasing button, wherein the first locking and releasing button is reversible. The disadvantage of such a solution is the structural complexity, and therefore the high cost.

Each telescopic shoulder rest allows you to adjust at least two positions - fully retracted, fully extended. It can also contain various intermediate positions, thanks to which the user can set the length of the extension according to his own needs.

In order to prevent the armrest from retracting spontaneously when firing from a weapon, the weapon is equipped with a mechanism that can lock the stock in defined positions. The adjustable shoulder rest, which can be purchased commercially under the designation "SB Tactical CZPDW CZ Scorpion Pistol Brace" as a separate accessory to the Scorpion Evo 3, uses a locking mechanism with a transverse locking pin, which is mounted vertically adjustable under a pair of shoulder rest arms. Both opposite ends of the locking pin are guided in opposite corresponding vertical grooves formed in the chassis of the weapon. The locking pin is pushed by a spring towards the bars of the shoulder support, where on the underside of each of the bars they are spaced

- 1 CZ 2020 - 652 A3 arranged at least two pairs of corresponding recesses for engaging the locking pin. The transverse locking pin is then controlled directly by the shooter using a button.

Depending on the caliber used and thus the magnitude of the weapon's return pulse, these mechanisms are relatively highly stressed, because the entire return pulse must be captured only by a transverse locking pin guided in opposite grooves in the chassis of the weapon. Therefore, all parts are made of metallic materials. This can be a clear disadvantage in a competitive environment.

The object of the invention is to propose a construction of the shoulder support which does not have the above-mentioned drawbacks of the prior art.

The essence of the invention

This object is achieved by a handgun with an adjustable shoulder rest, which is mounted in the chassis of the weapon by means of a pair of rods slidably mounted in the guide, the current position of the shoulder rest being lockable by a locking mechanism comprising a transverse locking element mounted vertically adjustable. under a pair of arms, the two opposite ends of the locking element being guided in opposite corresponding vertical grooves formed in the chassis of the weapon and the locking element being pressed by a spring towards the rods, where at least two pairs of corresponding recesses are formed on the underside of each rod The locking element and the locking element can be manually pulled out of the recess by means of a control button according to the invention, the essence of which consists in that the locking element is mounted on a carrier, where the weapon chassis phenomenon is pivoted about an axis which is arranged in a hole in the weapon chassis between bars.

An advantage of the solution according to the invention is that the interposed carrier makes it possible to distribute the return impulse from the shot to two knots, on the one hand via opposite ends of the locking element into opposite corresponding vertical grooves formed in the chassis of the weapon and on the other hand into the carrier in the chassis. This allows the use of a plastic weapon chassis.

According to a preferred embodiment, the control button is mounted vertically slidably in the trigger mechanism holder and in the bolt housing, the transverse pin passing through the control button and abutting the carrier from above.

Explanation of drawings

The invention will be described in more detail by way of an example of a specific embodiment of a handgun with an adjustable shoulder rest according to the invention, shown in the accompanying drawings, in which the individual figures represent:

Fig. 1 - detail of the arms of the shoulder rest and the locking mechanism in the position "locked", for simplification without the chassis of the weapon;

Fig. 2 - detail of the spade shoulder rest and the locking mechanism in the "locked" position, for simplification without the weapon chassis;

Fig. 3 - larger detail of the shoulder rest and the locking mechanism in the "locked" position, for simplification without the weapon chassis;

Fig. 4 - larger detail of the shoulder rest and the locking mechanism in the "locked" position, for simplification without the weapon chassis;

Fig. 5 is a top view of a detail of the locking mechanism between the bars of the shoulder support, for simplification without the chassis of the weapon;

-2GB 2020 - 652 A3 Fig. 6 - rear end of the weapon with partially extended shoulder rest;

Fig. 7 - section of the Y-Y weapon in the place of the locking element;

Fig. 8 - section of Z-Z weapons at the location of the carrier axis;

Fig. 9 is a side view of the handle of the weapon showing the sections Y-Y and Z-Z;

Fig. 10 - locking mechanism with the control button in the "locked" position;

Fig. 11 - locking mechanism with control button in the "locked" position.

Examples of embodiments of the invention

The individual subassemblies of an exemplary embodiment of a handgun with an adjustable shoulder rest 7 and a locking mechanism according to the invention are shown in FIGS. 1 to 11.

The shoulder support 7 has two side-by-side rods 5, which are slidably mounted in the chassis 10 of the weapon in a guide 17 (see e.g. Figs. 7, 8 and 9).

The current position of the shoulder support 7 is lockable by a locking mechanism which in the illustrated embodiment comprises a transverse locking element mounted vertically adjustably under the pair of rods 5 so that both opposite ends of the locking element 1 are guided in opposite vertical grooves 9 formed in the chassis 10 of the weapon. The locking element 1 is mounted on the carrier 3 and the carrier 3 is pivotably mounted in the chassis 10 of the weapon about an axis 6 which is arranged in a hole 8 in the chassis 10 of the weapon between the rods 5 (see e.g. Figs. 1, 3, 5, 7 and 8). ).

The locking element 1 is pressed over the carrier 3 by a spring 4 towards the rods 5, several pairs of transversely arranged corresponding recesses 2 for engaging the locking element 1 being formed at a distance on the lower edge of each of the rods 5. Pairs of corresponding recesses 2 for engaging the locking element element 1 define the position of the shoulder rest relative to the weapon. In the exemplary embodiment shown, these are the positions "fully retracted", "fully extended" and several "intermediate positions". The spring 4 rests on a support pin 14 (see Fig. 10 all).

The locking element 11 is pushed out of the recess 2 by means of an actuating button 12 which acts on the carrier 3 against the direction of action of the spring 4. The actuating button 12 is mounted vertically slidably above the handle 11 so as to pass through the trigger mechanism holder 15 and the bolt housing 16. A transverse pin 13 is arranged in the control button 12, which can abut from above on the protruding projections of the carrier 3 (see Figs. 10 and 11).

When handling the shoulder rest 7, the control button 12 is pressed downwards (see Fig. 11), so that the transverse pin 13 presses the protruding protrusions of the carrier 3 against the direction of the spring 4 and the carrier 3 is tilted downwards about the axis 6 (see Fig. 2). ) and slides the locking element 1 out of the respective pair of corresponding recesses 2 on the lower edge of the bars 5. The detached shoulder support 7 can then be extended or retracted as required.

When the control button 12 (see Fig. 10) is released, the spring 4 pushes the carrier 3 together with the locking element 1 upwards, so that the locking element 1 slides along the lower edges of the rods 5 until it engages in the nearest pair of recesses 2.

Claims (2)

PATENT CLAIMS A handgun with an adjustable shoulder rest (7), which is mounted in the chassis (10) of the weapon by means of a pair of rods (5) slidably mounted in a guide (17), the current position of the shoulder rest (7) being lockable by a locking mechanism, comprising a transverse locking element (1) mounted vertically adjustably under a pair of arms (5), the two opposite ends of the locking element (1) being guided in opposite corresponding vertical grooves (9) formed in the chassis (10) of the weapon, and a locking element (1) is pressed by a spring (4) towards the rods (5), where at least two pairs of corresponding recesses (2) for engaging the locking element (1) and a locking element (1) are formed at a distance on the underside of each of the rods (5). 1) is manually extendable from the recess (2) by means of a control button (12), characterized in that the locking element (1) is mounted on the carrier (3), where the carrier (3) is pivotally mounted in the chassis (10) of the weapon. an axis (6) which is arranged in a hole (8) in the chassis (10) of the weapon between the rods (5). Small arms according to Claim 1, characterized in that the actuating button (12) is mounted vertically in a sliding manner in the trigger mechanism holder (15) and in the breech housing (16), the transverse pin (13) passing through the actuating button (12). , which rests on the carrier (3) from above, and the control button (12) acts on the carrier (3) against the direction of action of the spring (4).