EP2021727B1 - Shoulder stock fastening - Google Patents

Abstract

Adjustable shoulder stock apparatus for use with firearms are described. An example adjustable shoulder stock apparatus for use with firearms includes a shoulder stock into which a connecting piece of the firearm is to be inserted. The connecting piece defines a plurality of boreholes. Additionally, the example adjustable shoulder stock apparatus includes a bolt having a end to be inserted in one of the plurality of boreholes to secure the shoulder stock relative to the connecting piece. Further the example adjustable shoulder stock apparatus includes a lever that defines a recess that is open toward a top of the firearm and is closed toward a bottom of the firearm. An opposite end of the bolt is positioned in the recess and coupled to the lever. The lever is to remove the bolt from the one of the plurality of boreholes. The lever comprises a projection to engage a wall of the shoulder stock to prevent movement of the lever past the wall. Further still, the example adjustable shoulder stock apparatus includes a cross pin positioned through the bolt to couple the bolt to the lever, wherein the cross pin does not protrude beyond a molded material of the lever and a plurality of lateral flanks of the shoulder stock in which the lever is positioned.

Description

• einer Schulterstütze, die von hinten her auf einen Stutzen aufschiebbar ist, der von der Rückseite des mit der Schulterabstützung zu versehenden Gegenstandes vorsteht und hintereinanderliegende Eingriffsaufnahmen aufweist, wobei die Schulterstütze einen nach unten ragenden Bolzen aufweist, der auf der Oberseite einen Eingriffskörper zum Eingreifen in die Eingriffsaufnahmen trägt oder als solcher ausgebildet ist, und
• einem Hebel, der im Bereich der Unterseite des Bolzens angeordnet ist und mit diesem in Eingriff steht, um beim Betätigen den Eingriffskörper außer Eingriff mit einer der Eingriffsaufnahmen zu bringen (Oberbegriff des Anspruchs 1).

The invention relates to an adjustable shoulder support with

• a shoulder support slidable from behind onto a neck projecting from the rear of the article to be shouldered and having engagement receptacles disposed one behind the other, the shoulder support having a downwardly depending bolt engaging on the upper surface an engaging body for engaging in Carries engagement recordings or is designed as such, and
• a lever, which is arranged in the region of the underside of the bolt and is engaged with this, in order to bring the engagement body out of engagement with one of the engagement receptacles when actuated (preamble of claim 1).

If in the following from a location designation as "down", "front", "about" o. The like. Is assumed, then the shoulder support with the weapon to which the shoulder rest is fixed, always considered in the attitude of a normal attack with horizontal run and without edge facing forwards. Of course, the shoulder rest can also be removed or attached to another device, such as an aiming device for exercise purposes.

The rapid-fire rifle currently used in the US (the M 16 or M 4) is equipped with a shoulder rest that can be gradually adjusted in length and is generally removable. This shoulder rest is in the DE-OS 1 553 855 shown ( Fig. 1 and 2 , Reference numeral 1). It has one at the back Bottom plate 3 and is pushed over a connecting piece on the back of the rifle from the rear, which extends along the axis of the soul (weft direction) 5. This nozzle has at the bottom several consecutive, downwardly open holes. A vertical bolt 7 is mounted under the holes and is by a spring (not shown) pushed up so that it is incident in its rest position in one of the holes. The guide of the bolt 7 is a hole in the shoulder rest.

From below, a deduction similar lever 9, which is formed of sheet metal or plastic, pushed by means of a bore introduced in it on the bolt 7 and secured by a transverse pin 13 which passes below it through a bore of the bolt 7 and projects on both sides , This cross pin 13 may be taken about, be bent on both sides or be designed as a spring pin.

A central pier 15 (in Fig. 2 not shown) of the shoulder support 1 extends in the longitudinal direction of the rifle from front to back and down and adjacent both sides with a small distance to the lever 9, so that the lever 9 can not rotate, but always occupies the same position as the actual trigger of the rifle.

In the shoulder rest 1, the lever 9 rests on an overlying edge (not shown), at a position just behind the bolt 7. Now, with the finger in the direction of the arrow ( Fig. 1 ) is pressed against the lever 9, then it pivots about said edge, pressing down against the pin 13. As a result, the bolt 7 is pulled down against the force of said spring, and the bolt 7 exits from its bore in which it was located downwards. Now, with the lever 9 pulled, the length of the shoulder support 1 can be adjusted.

Since the lever 9 on the said edge on which it rests, can slip, and partly because of the game in the leadership of the bolt 7, seen in the longitudinal direction of the shoulder rest or the rifle, the operations operate when operating smoothly.

In the said neck, which is attached to the rifle, behind the said holes, which serve to adjust the length of the shoulder support, a downwardly projecting stop arranged, against which the bolt strikes when pulled the lever, the shoulder rest is pulled all the way back. The shoulder rest can thus not be deducted from the neck and thus not from the rifle. But if the lever 9 is taken at the rear end 17 and pulled vigorously against the force of said spring down, then the pin 7 is moved so far down with the cross pin 13, that it lies with its upper end below the stop. Now the shoulder rest 1 can be removed from the neck and thus from the rifle.

In this arrangement, some shortcomings have arisen, for example, that the shooter caught with the sleeve at the rear end 17 of the lever 9 and a rapid hand movement pulls it down without wishing to solve the shoulder rest. So he can, without wishing to adjust the shoulder rest 1 or even deduct.

Another disadvantage is that the rear end 17 of the lever 9 then, when it is not operated, projects downwards. The rifle may stick to a branch or the like under this end 17 as it is moved down and back. The shooter can even reach behind the end of the lever 9 with his finger and injure himself at the sharp end 17 of the lever 9.

If a shooter reaches behind the lever 9 and shoots, he injures himself by the recoil of the weapon.

Although it would be possible to round off or bevel this end 17 of the lever 9, then the lever 9 would have to be extended rearwardly by the length of the rounding or bevel to provide the shooter with a safe support point that is far enough behind the said end in order to easily adjust the length of the shoulder support 1, so that at least one of the settings would have to be omitted, because yes, the shoulder rest would be longer as such.

The object of the invention is now to improve the handling of the shoulder rest without having to sacrifice one of the advantages of the existing buttstock (short length, adjustability, low manufacturing costs).

To solve the problem is the US 2004/0031182 A1 taken from the fact that the lever has in its upper side a recess which receives the underside of the bolt, wherein the depression is closed down and a fastening pin or transverse pin so transversely through the bolt, is attached, that he does not have the material of the lever outstands. Furthermore, the lever is received within side cheeks of the shoulder rest.

The invention consists in that the rear end of the lever has an extension with which it engages behind a transverse wall of the shoulder support so that it can not be engaged from behind. Together with the side cheeks, which also the inventive buttstock like the well-known has, and with the wall of the shoulder support on the front of the lever, the lever is completely surrounded in its rest position by parts of the shoulder rest, which allow only the removal. In this case, the lever preferably has an angled, lower surface, which are enclosed on both sides by side cheeks of the shoulder support and the back of the transverse wall, so that the lever can only be actuated when it is pressed in between the side walls. For example, a branch that lays across the sides of the cheek only pushes against the buttstock, not against the lever. Unintentional actuation is therefore virtually impossible.

When used in damp terrain, when the shoulder rest is already adapted to the shooter, a little bit of grease is also needed to completely seal the contours of the lever and to ensure that virtually no moisture gets inside the mechanism of the shoulder rest. In addition, the lever has no protruding edges, not even the rear edge, where he could impose an obstacle or with which he could injure the shooter's hand. Thus, a lever training is created, which rests flat against the shoulder support and thereby avoids all the disadvantages of the known arrangement mentioned above, but also has additional advantages, such as the good seal against the ingress of moisture, without increasing the cost of production would count. first used in 1936 in the US rifle M1 Garand, where the lever was cast from zinc, but still required elaborate burnishing. In the invention, a hard plastic is recommended, so that the lever comes practically ready to install from the die-casting mold.

In this lever of (molding) material, the cross pin is inserted so that it is completely submerged. An interference fit in the bolt prevents it from failing. This solution is particularly possible with a workpiece made of molding material, because this workpiece can accommodate the bolt with greater accuracy than is possible with a bent part. In addition, the bore which receives the bolt or a corresponding part may be formed as a blind bore, so that does not get through the bottom of the bore moisture and dirt in the shoulder rest.

It is completely impossible to get stuck with one part of the clothing at one end of the transverse bolt because the cross bolt does not protrude. Instead, an easily grasped but in no way obstructing projection on the lever can be formed with which the lever can be pulled down when removing the shoulder rest. In addition, the lever is protected by the side walls against external influences, such as side impacts on the weapon.

Thus, an arrangement is created that works better than the known arrangement, but is also cost-effective, even more cost effective in large quantities.

A development of the invention consists in that a tension member is arranged between the fastening or transverse pin and the upper side of the hollow bolt (claim 2). This allows the bolt to cover a vertical movement while the location of the lever on which the Tension member is attached, in addition to perform a slight horizontal movement. The contact point on the edge thus forms a kind of hinge.

A further embodiment of the invention is that the underside of the bolt is received in a downwardly narrowed bore of the shoulder rest and provided with a shoulder, and that between the shoulder and the constriction of the bore, a helical spring is arranged in a lower portion of the bolt (Claim 3). For example, the hole with the spring can be filled with grease. In this way, the rusting of the spring is at least delayed, so that it loses no spring force within its period of use.

An embodiment of the invention is that the lever is seated in its front part from below flat on a flat portion of the shoulder support, whose rear portion cooperates with a pivot edge of the lever to form the hinge by which the lever can be tilted so in that the length of the shoulder support is adjustable (claim 4). The flat support prevents the ingress of moisture into particularly sensitive parts of the shoulder rest.

A particularly preferred embodiment of the invention is that at a distance behind the point by which the lever can be tilted to release the engagement with the pipe socket of the rifle, a trailing edge of the shoulder support is arranged, on which the lever is seated when he is adjusting the length of the shoulder support is sufficiently pulled (claim 5). It is therefore not possible to pull the lever too far, so that not only force is saved, but in borderline cases, the accidental release of the shoulder rest is avoided. The Trailing edge is preferably located opposite the location where the finger grips the lever so that bending loads are minimized. The introduction of gripping grooves on the bottom or front of the lever ensures that usually the lever finger is pressed on the gripping grooves and thus opposite the trailing edge.

The lever could be grabbed and pulled down if you want to remove the shoulder rest. However, it is preferred that the drawn lever is grippable at its front part and pivotable about the trailing edge to release the shoulder support (claim 6). The front part of the lever, where the optimum leverage is exercised, does not need to protrude, or only slightly protrude, when the lever is not pulled. Only when the lever is pulled can this front part be grasped and pressed down with the lever pivoting around the rear edge and pulling the bolt down so far that the shoulder support can be removed. For this purpose, two hands are required, the one for pulling and the other for gripping the front, so that an accidental disassembly of the shoulder rest is practically impossible.

A further embodiment of the invention is that the front of the lever is seated in its rest position on a block of the shoulder rest and beyond this forward only so far that it still does not form a handle for releasing the shoulder rest (claim 7). This small projection ultimately serves only to facilitate the gripping of the front of the lever when it is already fully pulled. In addition, a reliable support on the block is created, even if large manufacturing inaccuracies can be expected.

A further embodiment of the invention is that the shoulder support and the lever made of plastic (claim 9). Thus, a lightweight, insensitive to seawater shoulder rest is created, which has significantly lower production costs, compared with the known training of aluminum alloy. The shoulder rest of the invention is also lighter and, as already explained, much easier to handle than the known shoulder rest.

Fig. 1

eine Seitenansicht einer bekannten Schulterstütze,

Fig. 2

eine Ansicht aus der Richtung II in Fig. 1,

Fig. 3

eine Seitenansicht der erfindungsgemäßen Schulterstütze,

Fig. 4

einen Schnitt durch die Darstellung der Fig. 3,

Fig. 5

einen Längsschnitt durch die Schulterstütze mitsamt dem Rohrstutzen eines Gewehres, bei gedrücktem Hebel zum Einstellen der Länge der Schulterabstützung, und

Fig. 6

eine Darstellung wie in Fig. 5, jedoch mit herausgezogenem Hebel, zum Abnehmen der Schulterstütze.

The object of the invention will now be described in more detail with reference to an embodiment shown in the drawing, which is in no way intended to limit the invention. In the drawing shows:

Fig. 1

a side view of a known shoulder rest,

Fig. 2

a view from the direction II in Fig. 1 .

Fig. 3

a side view of the shoulder rest according to the invention,

Fig. 4

a section through the representation of Fig. 3 .

Fig. 5

a longitudinal section through the shoulder rest together with the pipe socket of a rifle, with the lever pressed to adjust the length of the shoulder support, and

Fig. 6

a representation like in Fig. 5 but with the lever pulled out to remove the shoulder rest.

The Fig. 1 and 2 were already dealt with at the beginning in the treatment of the prior art. The reference numbers used there, where appropriate, also used in the description of the invention, but increased by 20.

Incidentally, reference numerals of individual elements were used only in the figures in which the corresponding element has special meaning. Of course, the same reference numbers apply to the Figures 1 and 2 or 3 to 6.

In Fig. 3 the inventive shoulder support 21 is shown in side view. This shoulder support 21 has a lever 29, which hardly protrudes outward. A cross pin 33 can be seen, but is not on the material of the lever 29 and therefore can not get caught anywhere. At the angled back of the lever 29 has a point 39, which is made recognizable by a corrugation. At the front of the lever 29 is an actuating portion 41 which projects beyond the shoulder support 21 forward a little. A transverse cheek 35 extends on each side of the lever 29 so that it is protected against accidental operation, for example by a transverse branch.

Out Fig. 4 It can be seen that the lever 29 on both sides has a side wall 47 which seals on each side from the inside against the adjacent side wall 35. The side cheeks 35 take the lever 29 in each lever position, so shield it against external influences.

The flat upper surface of the lever 29 rests on the front side thereof on a front wall 43 of the shoulder support 21 and a little behind on the flat bottom surface of a pad 51 of the shoulder support 21. At the rear of this block 51, the flat upper surface of the lever 29 terminates in a hinge edge 53.

In the block 51 is a vertical, downwardly narrowed bore 55 is introduced, in which a hollow trained, stepped Bolt 27 is seated. Around its tapered end is a spring 57 (in Fig. 4 not shown, but in Fig. 5 seen), which is supported between the shoulder 37 of the bore 55 and the shoulder of the bolt 27. Between the cross pin 33 and the top of the bolt 27, a tension member 31 is arranged.

The bolt 27 is secured to the transverse pin 33 in a blind hole only open in the lever 29. Above the pin 27, a bore 49 is introduced in the upper wall of the shoulder support 21, through which the bolt 27 can be pressed during assembly against the force of the spring 57 down. This hole 49 can be closed later.

The operation when operating the lever 29 is in Fig. 5 shown: when pressed with the finger against the point 39 and the existing ribbing without touching the side walls 35, then pivots the lever 29 about the hinge edge 53, thereby pulling the bolt 27 by means of the transverse pin against the force of the spring 57 bottom until the side walls 47 of the lever 29 abut against a leading edge 59 which is formed in the shoulder support 21, the point of application 39 opposite.

The nozzle 65, which belongs to the rifle, has at the bottom a number of holes 61, the lower ends of which are connected by a lower surface 63. The bottom surface 63 is closed forward and backward by a downwardly projecting block 67. When the lever 29 is fully pulled, the upper end of the bolt 27 is just below the lower surface 63, so that the shoulder support 21 can be moved back and forth in the direction of the arrow 69 relative to the connecting piece 65 and thus to the rifle. When you release the lever 29 and the shoulder rest 21 in the direction of arrow 69th moved further, the bolt 27 falls into the next hole 61 and holds the shoulder support 21 firmly in this position. The front and rear block 67 prevents it, that the shoulder support 21 inadvertently releases from the neck 65. Further, the lever 29 can not be moved by the pressure on the point of application 39, since the point of application 39 of the front edge 59 is exactly opposite, against which the side walls 47 of the lever 29 abut with its rear edge.

With the lever 29 pulled, the operating section 41 can now be gripped on its front by the finger and be further pressed down obliquely. Now begins the lever 29, by its support with its side walls 47 on the front edge 59 of the shoulder support 21 to pivot it, wherein he pulls the bolt 27 against the ever higher force of the spring 57 down to the horizontal surface of the rear block 67 of the nozzle 65 slides over the bolt 27, if you pull the shoulder rest 21 in the direction of arrow 69 back. Now comes the shoulder rest 21 free and can be removed from the neck 65 and thus from the rifle ( Fig. 6 ).

1. 1. Ziehen des Hebels 29 durch Druck auf den Angriffspunkt 39 bis zum Anschlag auf der Vorderkante 59,
2. 2. Ergreifen des Betätigungsabschnitts 41 und weiteres Abwärtsziehen des Hebels 29,
3. 3. Aufschieben der Schulterstütze 21 auf den Stutzen 65, und
4. 4. Loslassen des Hebels 29 kurz vor der beabsichtigten Stelle und Weiterbewegen der Schulterstütze 21 bis zu dieser.

The touchdown of the shoulder support 21 on the neck 65 and thus on the rifle takes place in the following order:

1. 1. pulling the lever 29 by pressing on the point of action 39 until it stops on the front edge 59,
2. 2. gripping the operating portion 41 and further pulling down the lever 29,
3. 3. Slide the shoulder rest 21 on the nozzle 65, and
4. 4. Release the lever 29 shortly before the intended location and advance the shoulder rest 21 up to this.

Now the bolt 27 falls into the intended bore 61 of the nozzle 65, and the lever 29 springs back to its original position, with its rear end 71, the rear transverse wall 45 of the shoulder support 21 engages behind and with its upper surface on the lower surface of the Front wall 43 and the pad 51 rests. In this case, a certain resilience of the lever 29, which consists of plastic, ensures the tight contact of both the rear end 71 on the back of the rear transverse wall 45 and the actuating portion 41 on the front wall 43. The side walls 47 lie closely against the inner surfaces of the Side cheeks 35, so that a moisture-proofing of the inner parts of the shoulder support 21 is achieved, of which the bolt 27 and the spring 57 could be exposed to rusting.

Claims (8)

1. Adjustable shoulder support comprising:

   - a shoulder stock (21) which can be pushed from behind onto a connecting piece (65) which protrudes from the rear side of the object to be provided with the shoulder stock (21) and has engagement openings (61) located one behind the other, wherein the shoulder stock (21) has a downwardly protruding bolt (27) which carries on the upper side an engagement body for engagement in the engagement openings (61) or is designed as such, and

   - a lever (29) which is arranged in the region of the underside of the bolt (27) and is in engagement with the latter in order, when actuated, to bring the engagement body out of engagement with one of the engagement openings (61), wherein

   - the lever (29) has in its upper side a depression which accommodates the underside of the bolt (27),

   - the depression is closed at the bottom,

   - a fixing pin or transverse pin (33) is fitted so as to pass through in the transverse direction of the bolt (27) in such a way that it does not protrude outwards beyond the material of the lever (29),

   - the lever (29) is accommodated within side cheeks (35) of the shoulder stock (21),
   characterised in that the rear end of the lever (29) has an extension (71) with which it engages behind a transverse wall (45) of the shoulder stock (21) in such a way that it cannot be engaged beneath from behind.
2. Shoulder support according to claim 1, in which a lengthening tension member (31) is arranged between the fixing pin or transverse pin (33) and the bolt (27).
3. Shoulder support according to one of claims 1 to 2, in which the underside of the bolt (27) is accommodated in a downwardly narrowed bore (55) of the shoulder stock (21) and is provided with a step, and in that a coil-shaped spring (57) is mounted within the bolt (27) between the step and the narrowed section (37) of the bore (55).
4. Shoulder support according to one of claims 1 to 3, in which the lever (29) is seated in its front part from below flat against a planar portion (51) of the shoulder stock (21), the rear region of which cooperates with a pivoting edge (53) of the lever (29) in order to form the hinge about which the lever (29) can be tilted so that the length of the shoulder support is adjustable.
5. Shoulder support according to one of claims 1 to 4, in which a rear edge (59) of the shoulder stock (21) is arranged at a distance behind the point about which the lever (29) can be tilted in order to adjust the length of the shoulder support, on which rear edge the lever (29) is seated when it is sufficiently pulled to adjust the length of the shoulder support.
6. Shoulder support according to claim 5, in which the pulled lever (29) can be gripped at its front part (41) and can be pivoted about the rear edge (59) in order to detach the shoulder stock (21).
7. Shoulder support according to claim 6, in which the front part (41) of the lever (29) is seated in its rest position on a wall (43) of the shoulder stock (21) and protrudes forwards beyond the latter only so far that it does not yet form any handle for detaching the shoulder stock (21).
8. Shoulder support according to one of claims 1 to 4, in which the shoulder stock (21) and the lever (29) are made from plastic.

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