Adjustment mechanism of stock with quickly adjustable height cheek

Abstract

FIELD: armament.SUBSTANCE: device pertains to mechanisms for controlling the raising and lowering of the cheek of a firearm stock. The stock adjustment mechanism with a quickly height‑adjustable cheek consists of a base, a cheek, and a locking mechanism, and is secured to the standard buttstock backplate using standard screws. The cheek is made in the form of an L‑shaped part mounted on the base with the possibility of vertical movement; the locking mechanism includes a spring‑loaded retainer located on the vertical part of the cheek’s side surface and grooves located on the mating part of the base. The horizontal part of the cheek is U‑shaped and similar in shape to the contour of the butt ridge.EFFECT: technical result is a reduction in the time required to adjust the height, an increase in the convenience of adjusting the cheek and using the adjustment mechanism and its installation.5 cl, 2 dwg

Description

[0001] The device relates to small arms, namely to the mechanisms for controlling the raising and lowering of the butt cheek.

[0002] A buttstock for a small arms with a cheek and butt plate that can be quickly adjusted in height is known (patent No. 2616121 dated 05 / 12 / 2016).This buttstock comprises a cheek piece, guides, a lever and a spring-loaded element, wherein the buttstock has vertical posts for the guides fixed in it, the cheek piece is made in the form of a U-shaped metal plate pivotally connected to a spring-loaded lifting buttplate, the locking mechanism comprises a rod vertically located between two front posts of the guides, at the lower end of which a lever is fixed with a screw, with a gap on its neck, resting on the bend of the lower surface of the buttstock, and at the upper end of the rod a leaf spring is fixed with a screw, having radius recesses at the ends bent upwards, the radius of which corresponds to the radius of the guides, resting with its ends on the side surfaces of the two front guides and located in a longitudinal groove on the upper surface of the buttstock, wherein the length of the longitudinal groove is one third shorter than the length of the leaf spring, and its depth is not less than six of its thicknesses.The disadvantage of the proposed stock is the complex adjustment mechanism with leaf springs.

[0003] The closest prototype is the cheekpiece adjustment mechanism (patent no. US 4203244, July 17, 1978). The mechanism is mounted on the buttstock and is adjustable. It includes plates, a cheekpiece, and a buttplate. A set screw, included with the device, allows for adjustment of the cheekpiece and buttplate relative to the buttstock. The disadvantages of this design include the difficulty of attaching the mechanism to the buttstock using screws and an additional dovetail plate. Furthermore, cheekpiece height adjustment is performed using screws, which requires additional tools and is quite difficult in the field.

[0004] The technical result of the claimed invention is to reduce the time for adjusting the height and to increase the convenience of adjusting the cheek, as well as to increase the convenience of using the adjustment mechanism and its installation without changing the design of the butt, only when using the standard mounting locations.

[0005] The problem is solved by a buttstock adjustment mechanism with a quickly adjustable cheekpiece, comprising a base, a cheekpiece, and a locking mechanism, which is attached to the stock buttplate using standard screws. The cheekpiece is designed as an L-shaped part mounted on the base with the ability to move vertically by means of guide protrusions and guide grooves located on the side edges of the base and cheekpiece. The locking mechanism includes a spring-loaded latch in the form of a button located on the vertical part of the side surface of the cheekpiece and grooves located on the mating part of the base. The cheekpiece has a thin, U-shaped form, closely matching the contour of the buttstock comb. A functional opening is made on the rear surface of the base, providing access to the buttstock folding mechanism button and the accessory compartment located in the buttstock.

[0006] The essence of the invention is explained by drawings

[0007] Fig. 1 - general view of the adjustment mechanism installed on the butt.

[0008] Fig. 2 - general view of the adjustment mechanism.

[0009] The buttstock adjustment mechanism with a quickly height-adjustable cheekpiece comprises a base 1. The cheekpiece 2 is designed as an L-shaped part. The horizontal part of the cheekpiece is U-shaped and is as close as possible in shape to the contour of the comb, which ensures that in the lower position of the adjustment mechanism the cheekpiece almost completely coincides with the contour of the buttstock comb. Guide grooves 3 are located on the side edges of the base 1. Guide projections 4 are located on the side inner vertical surfaces of the cheekpiece 2. If necessary, guide grooves can be made on the side surfaces of the cheekpiece, and guide projections - on the side surfaces of the base. On the vertical part of the side surface of the cheekpiece 2, a lock 5 with a locking projection 6 is located. The lock 5 can be made, for example, spring-loaded, in the form of a button. On the mating side surface of the base 1, as an option, locking grooves 7 are made in one of the guides 3.The spring-loaded latch 5 and locking grooves 7 comprise the locking mechanism. A functional opening 8 is provided on the rear surface of the base 1, providing access to the stock's folding mechanism button and the accessory compartment located in the stock. Base 1 is attached to the stock using standard buttplate screws 9. Base 1, cheek piece 2, and latch 3 may be made of lightweight materials, such as plastic.

[0010] The buttstock adjustment mechanism with a quickly adjustable cheekpiece operates as follows. Base 1 is attached to the stock buttplate with standard screws 9, which allows for secure fixation without changing the buttstock design. Cheekpiece 2 is installed in guide grooves 3 by means of guide projections 4, along which it can move vertically. If necessary, guide grooves can be made in the cheekpiece, and guide projections - in the base. A spring-loaded latch 5 in the form of a button is installed in cheekpiece 2. When latch button 5 is pressed, locking projection 6 disengages from locking groove 7, and cheekpiece 2 thus moves freely up or down. When latch 5 is released, locking projection 6 engages with the nearest locking groove 7, rigidly fixing cheekpiece 2 at the selected height.The cheekpiece locking mechanism described above allows for quick adjustment of cheekpiece height without the use of special tools, even in the field. At its lowest point, cheekpiece 2 rests on the comb of the standard buttstock. Due to its thin, U-shaped design and its contoured contour, it does not interfere with aiming with the weapon's mechanical sights, allowing for quick switching between sight types. The adjustment mechanism, made of lightweight materials such as plastic, maintains the weapon's balance and does not interfere with its folding. A functional opening on the rear surface of the base preserves the functionality of the buttstock, allowing access to the accessory compartment and the buttstock folding mechanism button.

[0011] Thus, the proposed design of the buttstock adjustment mechanism with a quick-adjust cheek piece reduces the time required for height adjustment and improves the ease of cheek piece adjustment, including in the field and without the use of special tools. The ease of use of the adjustment mechanism is enhanced, in part, by the U-shaped upper part of the cheek piece, which closely matches the shape of the buttstock comb, allowing for the use of various types of sights. Attaching the adjustment mechanism to the buttstock with standard screws ensures its secure fit without modifying the buttstock. Manufacturing the adjustment mechanism components from lightweight materials, such as plastic, maintains the weapon's balance and does not interfere with its folding.

Claims

1. An adjustment mechanism for a buttstock with a cheekpiece that is quickly adjusted in height, comprising a base, a cheekpiece, and a locking mechanism, characterized in that the cheekpiece is made in the form of an L-shaped part mounted on the base with the possibility of vertical movement by means of guide projections and guide grooves located on the side edges of the base and cheekpiece, the locking mechanism includes a lock located on the vertical part of the side surface of the cheekpiece, and locking grooves located on the mating side part of the base, wherein the base is made with the possibility of fastening to the buttstock by means of standard buttplate screws.

2. An adjustment mechanism for a buttstock with a cheekpiece that can be quickly adjusted in height according to paragraph 1, characterized in that the base, cheekpiece, and retainer are made of plastic.

3. An adjustment mechanism for a buttstock with a cheekpiece that can be quickly adjusted in height according to paragraph 1, characterized in that the upper part of the cheekpiece is U-shaped.

4. An adjustment mechanism for a buttstock with a cheek piece that can be quickly adjusted in height according to paragraph 1, characterized in that a functional opening is made on the rear surface of the base.

5. An adjustment mechanism for a buttstock with a cheekpiece that can be quickly adjusted in height according to paragraph 1, characterized in that guide projections are provided on the side surfaces of the cheekpiece, and guide grooves are located on the mating side faces of the base.

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