EP3649424B1 - Device for adjusting the orientation of a rear stock of a portable firearm - Google Patents

Description

The invention relates to a device for adjusting the alignment of a buttstock of a handgun, in particular a long weapon, to a barrel of the handgun, with a ball joint arranged between the buttock and a front part firmly connected to the barrel, which has a first fixed position connected to the front part or rear stock Joint part and an oppositely pivotable second joint part connected in a fixed position to the other of the rear stock or front part, the first joint part and the second joint part being connected to one another by means of a fixing device in order to be pivotable and rotatable against one another in a released state of the fixing device and in one fixed state of the fixing device in their set positions to be fixed against each other, and the fixing device has at least one fixing element for releasing and fixing the fixing device.

Adjustment devices of this type enable the alignment of a front part of the firearm with respect to a buttstock of the firearm to be individually adapted to the needs of a shooter and thus facilitate handling of the firearm, both while aiming at a target and during the subsequent firing of a shot. In connection with this invention, the front part is to be understood as meaning the remaining part of the firearm which is not firmly connected to the buttstock or is not associated with the buttstock and which surrounds the barrel or is firmly connected to the barrel. Adjustment devices with a ball joint offer particularly diverse adjustment options for aligning the barrel with respect to the buttstock.

The U.S. 2,631,398 discloses a hunting rifle whose buttstock is adjustable relative to the sight line of the hunting rifle. For this purpose, a rod, which passes through the buttstock and connects it to a handle part, can be pivoted about a pivot point of the handle part by means of a ball joint. At the end facing the rear stock, the handle part has a convex spherical surface on which a correspondingly shaped front side of a disk rests, which is received on the rod between the handle part and the rear stock. To the pole in relation To fix on the handle part in the desired position, a nut and a lock nut are screwed onto a threaded part of the rod, which press the disc against the handle part when screwed accordingly.

In an alternative construction, the rod runs through a conical hole in the buttstock and is firmly connected to the handle part. The rod has a spherical widening in the area of its end facing the handle part and is connected at the opposite end to an eccentric block which is rotatably arranged around the rod in the rear stock. The buttstock is adjusted by turning the eccentric block and fixed in the set position with a screw.

Disadvantageously, the rod for aligning the buttstock relative to the line of sight of the hunting rifle runs through the buttstock of the hunting rifle, so that this construction is only suitable for firearms with a corresponding receiving space for the rod in the buttstock.

The DE 36 31 391 A1 relates to a universal joint with which a rifle stock can be adapted to the anatomy of a shooter with regard to length, depression, offset and rotation. The universal joint has four rods, each of which is firmly connected at one end to one of four freely rotatable first balls and, facing away from this end, extends through one of four drilled through, slotted second balls. Here, the first ball quartet is positively and frictionally mounted in a first pair of plates, while the second ball quartet with adjustable frictional engagement for the rotatability of the second balls in a second pair of plates and for the axial displacement of the rods by the second balls is positively mounted in the second pair of plates.

It is now the object of the invention to provide an adjusting device as indicated at the beginning which avoids or at least reduces the disadvantages of the prior art. The adjustment device should also be suitable for firearms that do not have a receiving space for a rod penetrating the buttstock or provide other adjusting and / or fixing means penetrating the buttstock. This applies in particular to firearms in the buttstock of which recoil-damping devices are incorporated, or to technical devices for adapting the firearm. In addition, the adjustment device should be suitable for firearms whose rear stock is permanently connected to the front part or can only be detached from the front part with difficulty. In particular, the adjustment device should be easy to operate and inexpensive and reliable.

This object is achieved by a device according to claim 1. Advantageous designs and developments are given in the dependent claims.

The first joint part has a spherical, in particular spherical, joint head which is mounted in a corresponding recess of the second joint part and the fixing device has a clamping part which also has a recess for at least partially receiving the spherical joint head, the joint head in the fixed state over the at least one fixing element is clamped between the second joint part and the clamping part, the invention is characterized in that the second joint part with the spherical recess and / or the clamping part has at least one threaded hole and / or a, preferably stepped, through opening and an access opening to the Access to the threaded bore and / or through opening provided for receiving the fixing element is arranged on a surface of the clamping part or of the second joint part facing away from the rear stock. The handgun, in particular a long weapon, for example a hunting rifle, has a buttstock and a front part connected to it. In this case, in the position of use of the firearm, the rear stock is intended to rest on the shoulder of a shooter and the front part is generally directly connected to a barrel of the firearm. In order to be able to align the rear stock, in particular a longitudinal axis of the rear stock, with the front part, in particular with a longitudinal axis of the front part, a ball joint is arranged between the rear stock and the front part. The ball joint has a first and a second joint part, the first joint part is connected in a fixed position to the front part or the rear stock, while the second joint part is pivotable with respect to the first joint part and is connected in a fixed position to the other of the front part or rear stock. A fixed connection is understood to mean, in particular, a non-pivotable connection. The first joint part and the second joint part are connected to one another by means of a fixing device which is designed to be transferable at least between a released state and a fixed state. The fixing device is designed to allow the first joint part to pivot in relation to the second joint part in the released state and to prevent the first joint part from pivoting in relation to the second joint part in the fixed state, i.e. to fix the two joint parts in their set positions against each other . For releasing and fixing the fixing device, ie for transferring the fixing device between the released state and the fixed state, it has at least one fixing element. The ball joint is designed to be particularly reliable and stable with regard to the pivoting and fixing of the buttstock in relation to the front part, in that the first joint part has a spherical, in particular spherical, joint head which is mounted in a corresponding recess in the second joint part. The recess of the second joint part is advantageously designed for a planar and slidable contact of a part of the joint head thereon. In order to be able to fix the joint head and the recess of the second joint part to one another in a fixed position, the fixing device has a clamping part which also has a recess for at least partially receiving the spherical joint head. In the fixed state of the fixing device, the joint head is clamped in a fixed position between the second joint part and the clamping part by means of the at least one fixing element.

The ball joint thus enables the longitudinal axis of the rear stock to be pivoted relative to the longitudinal axis of the front part in two spatial dimensions and in a large angular range of, for example, between 0 ° and 45 °, preferably between 0 ° and 30 °, even more preferably between 0 ° and 15 °, as well a rotation around its own axis by 360 °. The ball joint and the fixing device are designed to be robust and inexpensive and enable the set positions of the buttstock and front part to be reliably maintained even when the firearm is in use. It is particularly important that the adjustment device does not have any components which extend far into the rear stock or through the rear stock. Accordingly, the adjusting device can also be used for firearms whose rear stock is unsuitable for receiving components of the adjusting device, in particular at the rear end, or whose rear stock should only be modified to the smallest possible extent.

In order to be able to release and fix the fixing device particularly easily and reliably, it is provided that the second joint part with the spherical recess and / or the clamping part has at least one threaded hole and / or one, preferably stepped, through opening. The threaded hole and / or through opening is provided for receiving the fixing element. Thus, a screw can be screwed into the threaded hole and / or through opening or another tension element inserted in order to force the second joint part and the clamping part against each other and thereby press the first joint part in a fixed position against the second joint part. If the through-opening is stepped, the head of a screw can be countersunk in the second joint part or in the clamping part, as a result of which injuries to the shooter that could occur on a protruding fixing element can be avoided.

Since an access opening for accessing the threaded bore and / or through-opening provided for receiving the fixing element is arranged on a surface of the clamping part or the second joint part facing away from the rear stock, the fixing element can advantageously be from the front, from the side, from above or from below the firearm and regardless of the design of the buttstock. Thus, no modification of the buttstock is required to access the fixing element. The access opening can in particular be designed as an extension of the threaded bore and / or through opening in order to be able to engage in the fixing element through the access opening, for example with a tool.

As used in this disclosure, the terms "rear" and "front" refer to the position of use of the firearm. Accordingly, the term rear means a position close to the shooter firing the weapon, while the term front describes a position close to a muzzle of the firearm. Likewise, the terms “up”, “down”, “left” and “right” are to be understood in the position of use of the firearm or viewed from the point of view of the shooter firing the weapon.

According to a preferred embodiment of the invention it is provided that at least one screw, preferably four screws, is or are provided as the fixing element. The at least one screw thus serves to selectively loosen and fix the fixing device, i.e. to transfer the fixing device between the loosened state and the fixed state. The at least one screw can be designed with a screw head that is suitable for engagement by a suitable tool. The screw head is particularly preferably designed for tool-free actuation of the screw, i.e. actuation by means of the shooter's fingers. For this purpose, instead of the screw head, the screw can be provided with a wheel to be turned by hand or with at least one wing protruding from the screw. If a plurality of screws arranged in a favorable manner are provided, jamming of the same can be prevented when the fixing device is being fixed, and the force required to tighten each screw can be reduced due to the distribution of forces on the plurality of screws.

For the pivoting or alignment of the rear stock in relation to the front part of the firearm, it is particularly advantageous if the joint head is arranged in a rear section of the front part, in particular in a grip section. In this way, essentially the entire front part can be pivoted in the same direction with respect to the rear stock. In addition, the rear section of the front part, in particular the handle section, generally offers sufficient space for the arrangement of the joint head.

For pivoting or aligning the buttstock in relation on the front part of the firearm, it is also advantageous if the joint head is arranged in front of a front end face of the rear stock facing the front part. In this way, the pivot point of the adjustment device lies outside the buttstock, so that no complex changes are required to accommodate the joint head therein.

To fasten the ball joint to the firearm, it can be provided that the joint head is connected to the buttstock by a mounting rod protruding therefrom. Thus, only one opening for receiving the assembly rod is required in the buttstock. The joint head and the rear stock can be connected to one another in a detachable or non-detachable manner. For example, the assembly rod and the opening in the rear stock can have a thread for screwing the assembly rod into the opening. In addition, by means of the length of the section of the assembly rod protruding from the front end face of the rear stock, the distance between the joint head and thus the pivot point of the adjustment device can be appropriately determined. The assembly rod also offers the advantage that it enables the ball joint to pivot at a large angle.

It is also favorable if the joint part is connected to the recess for receiving the joint head with the front part. In particular, the joint part with the recess, i.e. the second joint part, can be arranged in a rear section of the front part, in particular in a grip section. The front part, in particular its rear section or the handle section, generally offers sufficient space for at least partial accommodation of the second joint part. Of course, the second joint part can also be mounted on an outer surface of the front part.

In order to be able to clamp the joint head simply and reliably between the second joint part and the clamping part, it can be provided that the clamping part has a through opening for receiving the assembly rod. Thus, the clamping part is arranged around the assembly rod and can rest on the side of the joint head facing the rear part / front part, while the second joint part lies against the side facing the front part / rear part Side of the rod end. The through opening is advantageously arranged in the center of the clamping part in order to symmetrically exert the force of the clamping part on the joint head when the fixing device is being fixed.

• Fig. 1 eine Seitenansicht auf eine Handfeuerwaffe mit einem nur teilweise dargestellten Vorderteil und einem Hinterschaft, mit einer Einstellvorrichtung gemäß der Erfindung;
• Fig. 2 die Seitenansicht auf die Handfeuerwaffe aus Fig. 1 in einem Längsschnitt; und
• Fig. 3 eine Detailansicht der Einstellvorrichtung aus Fig. 1.

The invention is explained in more detail below with reference to preferred exemplary embodiments to which, however, it is not intended to be restricted. In the drawings show:

• Fig. 1 a side view of a handgun with an only partially shown front part and a rear stock, with an adjusting device according to the invention;
• Fig. 2 the side view of the handgun Fig. 1 in a longitudinal section; and
• Fig. 3 a detailed view of the adjustment device Fig. 1 .

Fig. 1 shows a rear part of a handgun H, in particular a long weapon, for example a hunting rifle, with an adjustment device 1, a buttstock 2, which is intended to rest on the shoulder of a shooter, not shown, and with a front part 3, only partially shown comprises a fore-end 3a, as well as a barrel 4, the barrel 4 on the top of the fore-end 3a and a trigger 5 on the underside of the fore-stock 3a being only indicated by broken lines. In addition, the front part 3 has a rear section 6, in particular a grip section 6a, which is arranged opposite to a muzzle (not shown) of the barrel 4. According to the exemplary embodiment shown, the rear stock 2 can be designed with a recoil-damping device R, which is arranged in particular in a central and rear section 7 of the rear stock 2. The recoil-damping device R is designed to transmit the recoil of the handgun H that occurs as a result of a shot being fired, in a damped manner, to a shoulder rest S, which is intended to rest on the shooter's shoulder. The recoil-absorbing device R itself is not part of the invention and is shown in the illustrated embodiment as a useful example of components, which take up a large part of the volume of the buttstock 2. To adjust the alignment of the rear stock 2 with respect to the barrel 4 or the front part 3 of the handgun H, a ball joint 8 is arranged between the rear stock 2 and the front part 3. The ball joint 8 in particular enables an angle between a longitudinal axis L2 of the rear stock 2 and a longitudinal axis L3 of the front part 3 to be set in two spatial dimensions, ie up, down, left and right.

The ball-and-socket joint 8 has a first joint part 9 connected in a fixed position to the rear stock 2 and a second joint part 10 which is pivotable with respect to this and which is connected in a fixed position to the front part 3. The two joint parts 9, 10 are thus pivotable relative to one another and are mounted rotatably about their own axis. In an equivalent, not shown embodiment, the ball joint 8 could have a first joint part 9 connected in a fixed position to the front part 3 and a second joint part 10 which is pivotable to the rear stock 2 and which is connected in a fixed position, for which case the following explanations by a person skilled in the art can be easily derived from embodiment shown can be transferred to the equivalent embodiment, not shown.

The first joint part 9 and the second joint part 10 are connected to one another by means of a fixing device 11. By means of the fixing device 11, the two joint parts 9, 10 can be pivoted relative to one another in a released state of the fixing device 11 and, in a fixed state of the fixing device 11, are fixed relative to one another in their set positions. In order to be able to detach and fix the fixing device 11, the fixing device 11 has at least one fixing element 12.

Fig. 2 shows a side view of a longitudinal section through the handgun H and Fig. 3 shows the adjustment device 1 from Fig. 2 , in longitudinal section, on an enlarged scale. It can be seen here that the first joint part 9 has a spherical, in particular spherical, joint head 13, which is mounted in a corresponding recess 14 of the second joint part 10. In order to be able to fix the two joint parts 9, 10 to one another in the set position or orientation, the Fixing device 11 has a clamping part 15 which likewise has a recess 16 for receiving the spherical joint head 13 at least in sections. Thus, the joint head 13 can be firmly clamped between the second joint part 10 and the clamping part 15 by means of the at least one fixing element 12 in the fixed state of the fixing device 11. In contrast, in the released state of the fixing device 11, the joint head 13 and the second joint part 10 can be pivoted with respect to one another.

The fixing element 12 for loosening and fixing the fixing device 11 can be at least one screw 17, in the present example two or four screws 17. To accommodate the fixing element 12, in particular screws 17, the second joint part 10 and / or the clamping part 15 have at least one threaded bore 18 and / or a through opening 19, which is preferably provided with a step 20 for receiving a screw head 17a. By means of the fixing element 12, which is received in the threaded bore 18 and / or through opening 19, the second joint part 10 and the clamping part 15 can thus be forced against one another in order to clamp the joint head 13 therebetween.

To access the threaded hole 18 and / or through opening 19, for example to access a screw head 17a, an access opening 25 is arranged on a surface F of the clamping part 15 or of the second joint part 10 facing away from the rear stock 2. The surface F facing away from the rear stock 2 can preferably be understood to mean that surface or that area which has a normal thereon, which in all adjustable orientations between the rear stock 2 and the front part 3 and in a direction away from the clamping part 15 or from the second joint part 10 does not intersect the buttstock 2. In the exemplary embodiments shown, the access opening 25 is provided on the front side 21 of the second joint part 10.

For an appropriate alignment of the rear stock 2 to the front part 3, it is advantageous if the joint head 13 is in the rear section 6 of the front part 3, in particular in the handle section 6a, and in front of a front face facing the front part 3 22 of the buttstock 2 is arranged. For example, the joint head 13 can be connected to the rear stock 2 with a mounting rod 23 protruding therefrom, and the second joint part 10 with the recess 14 for receiving the joint head 13 can be connected to or integrated into the front part 2. The clamping part 15 is advantageously provided with a through opening 24 for receiving the mounting rod 23, ie the clamping part 15 is pushed onto the mounting rod 23.

The adjustment device 1 thus enables a reliable alignment and fixation of the rear stock 2 with respect to the front part 3, by means of a ball joint 8 and a fixing device 11, for which only a fastening device on the rear stock 2, for example a bore for receiving a mounting rod 23, for connection to the Ball joint 8 is to be provided. The adjustment device 1 advantageously does not have any components which penetrate the rear stock 2.

Claims (7)

1. A device (1) for adjusting the orientation of a rear stock (2) of a handgun (H), in particular of a long firearm, relative to a barrel (4) of the handgun (H), comprising a ball joint (8), which is arranged between the rear stock (2) and a front part (3) fixedly connected to the barrel (4) which ball joint (8) comprises a first joint part (9) connected in a positionally fixed manner to the front part (3) or the rear stock (2), and a second joint part (10), which can be pivoted relative to the first joint part and which is connected in a positionally fixed manner to the other of the rear stock (2) or the front part (3), wherein the first joint part (9) and the second joint part (10) are connected to one another by means of a fixing apparatus (11) so as to be pivotable with respect to one another in a released state of the fixing apparatus (11), and so as to be fixed with respect to one another in their adjusted positions in a fixed state of the fixing apparatus (11), and the fixing apparatus (11) comprises at least one fixing element (12) for releasing and fixing the fixing apparatus (11), wherein the first joint part (9) comprises a spherical, in particular ball-shaped, joint head (13), which is mounted in a corresponding recess (14) of the second joint part (10), and the fixing apparatus (11) comprises a clamping part (15), which likewise comprises a recess (16) for receiving the spherical joint head (13) at least in some sections, wherein, in the fixed state, the joint head (13) is clamped between the second joint part (10) and the clamping part (15) by means of the at least one fixing element (12), characterized in that the second joint part (10) comprising the spherical recess (14) and/or the clamping part (15) comprises at least one threaded hole (18) and/or a, preferably stepped, passage opening (19), and an access opening (25) for accessing the threaded hole (18) and/or passage opening (19) provided for receiving the fixing element (12) is arranged on a surface (F) of the clamping part (15) or of the second joint part (10), which surface (F) faces away from the rear stock (2) .
2. The device (1) according to claim 1, characterized in that at least one screw (17), preferably four screws (17), is or are provided, respectively, as fixing element (12).
3. The device (1) according to claim 1 or 2, characterized in that joint head (13) is arranged in a rear section (6) of the front part (3), in particular in a handle section (6a).
4. The device (1) according to one of claims 1 to 3, characterized in that the joint head (13) is arranged in front of a front end face (22) of the rear stock (2) which front end face (22) faces the front part (3).
5. The device (1) according to one of claims 1 to 4, characterized in that the joint head (13) is connected to the rear stock (2) by means of a mounting rod (23) protruding from said joint head.
6. The device (1) according to claim 5, characterized in that the joint part (10) comprising the recess (14) for receiving the joint head (13) is connected to the front part (3).
7. The device (1) according to claim 5 or 6, characterized in that the clamping part (15) comprises a passage opening (24) for receiving the mounting rod (23).

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