EP4269929A1 - Device for dismantling a firearm - Google Patents

Abstract

The present invention relates to a gun comprising a disassembly protection device which comprises a disassembly key (7) rotatably arranged in a frame (18) and capable of being manually rotated between an angular locking position and an angular disassembly position , and said disassembly key being able to occupy a transverse rest position and a transverse rotation position, said disassembly key (7) comprising locking means (13) cooperating with complementary locking means (21) on the chassis in order to prevent rotation of the disassembly key (7) towards the angular disassembly position when said disassembly key occupies the transverse rest position.

Description

Object of the invention

The present invention relates to a mechanism for disassembling a gun. In particular, the present invention discloses a disassembly safety device.

State of the art

In the field of pistols, there are two main architectural principles relating to the weapon's disassembly mechanism.

These two main principles will be described below in the context of a pistol operating by short barrel recoil in which the barrel separates from the slide by tilting. This operating principle is most common in guns. However, the invention described in this document can be used for any type of pistol, whether the barrel is fixed or whether it separates from the slide by any movement.

As described for example in US 10,724,814 , a first architecture consists of placing a part that can pivot around itself at the front of the barrel. This part has the function of blocking the forward movement of the barrel and the slide during the cycle of the weapon. To disassemble the weapon, simply turn this part. Its asymmetrical body then allows the barrel and slide to pass forward and disengage them from the receiver.

In this architecture, another element fixed to the receiver is necessary to allow the barrel to be unlocked when the slide is retracted. This element usually takes the form of a pin or a wedge.

An advantage of this solution is that it allows rotation of the disassembly lever only for a given position of the slide. In fact, a half-moon shaped cutout in the slide allows the free rotation of this lever. Preferably, this cutout is located so as to be able to pivot the disassembly lever only when the slide has been moved back sufficiently to ensure the removal of a possible cartridge in the chamber. The disassembly sequence thus forces the user to unload the weapon.

After pivoting the disassembly lever, the user can then push the slide forward and remove the slide and the barrel out of the assembled receiver. Very often, the user must squeeze the trigger before being able to push the moving parts beyond their so-called battery position.

If a loaded magazine is present in the weapon during forward movement of the slide after rotation of the takedown lever, a cartridge will be chambered and firing pin release will lead to unintended firing.

To avoid this risk, this architectural principle can be coupled with an additional part set in motion when the disassembly lever is actuated. This movement (rotation or translation) is then only possible if the magazine is removed from the weapon. In other words, the lever can only be pivoted if the magazine is removed from the weapon and if the slide is in the appropriate position, then presenting its half-moon cutout opposite the disassembly lever. This principle of mechanism is for example described in the patent application EP2116804A1 .

The other major architectural principle concerning disassembly, for example described in US 4,825,744 . In this case, the part blocking the moving parts forward is retracted via translation rather than rotation.

There are mainly three advantages to this last solution. Firstly, and mainly, a reduction in the cost price of the weapon because this part can be made of plastic while the lever first described must be made of steel.

Secondly, the small external dimensions hinder the shooter's grip less. Indeed, a right-handed shooter will normally have the thumb of the weak hand on the takedown lever. The slight rotation that it can make before contacting the slide makes this support mobile, which can disturb the shooter. This problem does not arise with the principle of the disassembly pallet.

Thirdly, the weapon can only be dismantled by applying force simultaneously on both sides of the pallet. This prevents any risk of unintentional disassembly, which can happen with the disassembly lever. Indeed, when shooting, if the shooter presses the disassembly lever according to his grip and body shape, it happens that the lever turns when the slide arrives in the disassembly position. This prevents the next shot from being fired.

This architectural principle nevertheless has three disadvantages compared to the lever solution.

Firstly, it does not make it possible to force the unloading of the weapon because the pallet can be set in motion regardless of the position of the slide. There is therefore a much greater risk that the user will inadvertently leave a cartridge in the chamber.

Secondly, it makes disassembly less ergonomic because it is quite difficult to translate the pallet in order to allow the barrel and slide to pass through. The accessible gripping areas are very small although it is already necessary to provide a significant effort to overcome its return spring and the friction of the barrel which is pushed against the pallet by the effect of the recuperating spring.

Thirdly, the small translation to be made with the pallet to allow the barrel and the slide to pass makes it very complicated to set another part in motion which would make it possible to force the removal of the magazine in order to dismantle the weapon.

Summary of the invention

The present invention relates to a gun comprising a disassembly protection device which comprises a disassembly key rotatably disposed in a frame and capable of being manually rotated between an angular locking position and an angular disassembly position, and said disassembly key capable of occupying a transverse position of rest and a transverse position of rotation, said disassembly key comprising blocking means cooperating with complementary blocking means on the chassis in order to prevent rotation of the disassembly key towards the angular disassembly position when said disassembly key occupies the transverse rest position.

• les moyens de blocage sont de type tenon et mortaise ;
• le pistolet comprend une glissière coulissant sur un rail de glissière fixé au châssis entre une position de tir et une position arrière de rechargement, ladite glissière comprenant sous sa surface inférieure, un logement, la clé de démontage comprenant un tenon excentrique prenant appui sous la glissière, ledit tenon excentrique permettant la rotation de la clé de démontage uniquement lorsque ledit logement est positionné face audit tenon excentrique ;
• la clé de démontage comprend deux saignées d'indexation sur lesquelles peuvent s'appuyer un coulisseau (ou une pièce en rotation) maintenu contre la clé de démontage par un ressort ledit coulisseau prenant appui sur la première saignée d'indexation lorsque la clé de démontage occupe la position transversale de repos et prend appui sur la deuxième saignée d'indexation lorsque la clé de démontage occupe la position transversale de rotation ;

• la seconde saignée d'indexation présente un flanc interne droit discontinu, empêchant l'extraction de la clé de démontage en prenant appui sur un flanc externe droit du coulisseau lorsque la clé de démontage est en position angulaire de verrouillage, et permettant l'extraction de la clé de démontage lorsque celle-ci est en position angulaire de démontage ;
• les saignées d'indexation sont disposées sur un élément excentrique par rapport à l'axe de la clé de démontage, le coulisseau comprenant un palpeur pénétrant dans le puit de chargeur, l'élément excentrique empêchant la rotation de la clé de démontage ;
• le coulisseau présente une face externe inclinée permettant de déplacer le coulisseau lors de l'introduction de la clé de démontage vers sa position de repos, sans rotation ;
• un canon est fixé au châssis via l'axe de la clé de démontage passant dans une lumière fixée sous le canon.

According to preferred forms, the device of the invention comprises an appropriate combination of at least one of the following characteristics:

• the locking means are of the tenon and mortise type;
• the pistol comprises a slide sliding on a slide rail fixed to the frame between a firing position and a rear reloading position, said slide comprising, under its lower surface, a housing, the disassembly key comprising an eccentric tenon bearing under the slide , said eccentric tenon allowing the rotation of the disassembly key only when said housing is positioned facing said eccentric tenon;
• the disassembly key comprises two indexing grooves on which a slide (or a rotating part) can be supported held against the disassembly key by a spring, said slide resting on the first indexing groove when the disassembly key occupies the transverse rest position and is supported on the second indexing groove when the disassembly key occupies the transverse rotation position;

• the second indexing groove has a discontinuous straight internal flank, preventing the extraction of the disassembly key by bearing on a right external flank of the slide when the disassembly key is in the angular locking position, and allowing the extraction of the disassembly key when it is in the angular disassembly position;
• the indexing grooves are arranged on an eccentric element relative to the axis of the disassembly key, the slide comprising a feeler penetrating into the magazine well, the eccentric element preventing the rotation of the disassembly key;
• the slide has an inclined external face allowing the slide to be moved when the disassembly key is inserted towards its rest position, without rotation;
• a barrel is fixed to the frame via the axis of the disassembly key passing through a slot fixed under the barrel.

Description of figures

There figure 1 shows an example of a gun according to the invention.

There figure 2 shows the example of the pistol of the figure 1 , the slide in the rear position, and the disassembly key removed.

There Figure 3 shows a cutaway view of an example of a device according to the invention (the disassembly key is here truncated and at rest, in order to show the elements under the lever of the disassembly key).

There Figure 4 shows a bottom view of an example of a device according to the invention.

There Figure 5 shows a perspective view of an example of a disassembly key according to the invention.

There Figure 6 shows a partial view of the chassis of an example of a gun according to the invention.

There Figure 7 shows a partial view of the chassis of an example of a gun according to the invention, the disassembly key in the rest position (the disassembly key is truncated in the same way as in the Figure 3 , the hatching representing the cut of the key).

Figure legend

1.

Gun

2.

Slide

3.

Disassembly key lever

4.

Housing allowing the rotation of the disassembly key

5.

Cannon

6.

Recovery spring

7.

Disassembly key

8.

Safety slide

9.

External bearing surface of the slide (i.e. towards the outside of the weapon)

10.

Internal bearing surface of the slide (i.e. towards the inside of the weapon)

11.

First index bleeding

12.

Second indexing bleed

13.

Tenon

14.

Eccentric tenon

15.

Loader feeler

16.

Rope slide return spring

17.

Shoulder of the eccentric element of the disassembly key (right internal side, oriented towards the inside of the weapon.

18.

Frame

19.

Axle of the disassembly key

20.

Eccentric element of the disassembly key

21.

Mortise (locking element of the disassembly key)

22.

Slide rail

Detailed description of a preferred mode of the invention

The present invention relates to a disassembly key 7, or disassembly lever which allows when it is extracted from the chassis, as shown in figure 2 , to disassemble the slide 2, the barrel 5 and the recovery spring 6 of an automatic pistol. To allow the extraction of the disassembly key, it must first be turned manually by means of lever 3 from a blocking position to a disassembly position.

In order to avoid an angular play of the lever 3 perceptible by the shooter when he presses it, in the assembled weapon position, or the involuntary disassembly of the weapon during a shot in particular, the disassembly key is blocked in rotation by the chassis 18 and not by the slide. In this description, chassis should be understood in the broad sense: it may be an attached part comprising the slide rails 22 and other active elements such as the control device firing. This attached part is then integrated into a carcass. It may be a metal element attached to the carcass but not including the slide rails 22 or only some of them. It can also be a single piece carcass including the slide rails. Ideally, the blocking is carried out at the level of a metal element to avoid matting and its deformation. It can therefore be made on a metal element integrating for example the front rails or as illustrated in Figure 3 on a chassis integrating front and rear rails. Such blocking is advantageously obtained by a tenon 13 of the disassembly key blocking rotation in both directions by entering into a mortise 21 of the chassis. The rotational unlocking of the disassembly key 7 is then obtained by moving the key 7 transversely so as to cause the tenon 13 to emerge from the mortise 21.

The disassembly key preferably comprises two indexing grooves 11,12 perpendicular to its axis, a slide 8 being able to take place in one or the other of these grooves when the disassembly key occupies the angular position in which it is blocked in rotation (angular position called locking). This slide 8 is kept in contact with these grooves by suitable elastic means such as a return spring 16. When the disassembly key is pushed fully into its housing, its tenon 13 placed in the corresponding mortise 21, the slide is in the most external groove 11. This transverse position is called rest. It is this position which is illustrated in Figure 3 .

When the disassembly key is pulled outwards, the slide 8 takes place in the internal groove 12. In this position, the tenon 13 is outside the mortise 21 and allows the rotation of the key. Only then can the disassembly key be turned. This transverse position is called rotation. This position is for example represented in Figure 4 .

Advantageously, as shown in Figure 4 , a shoulder 17 on the disassembly key rests on the internal surface 10 of the slide and prevents the disassembly key 7 from continuing its transverse extraction movement when the key occupies an angular locking position. The shoulder 17 is discontinuous (ie not present over the entire circumference of the disassembly key), so that, when the key is turned towards an angular disassembly position, the shoulder 17 no longer faces the internal surface 10 slider, allowing complete extraction of the disassembly key 7.

According to a preferred embodiment of the invention, the dismantling key also makes it possible to prevent the weapon from being dismantled when a magazine is present in the magazine well. To this end, the slide 8, arranged between the disassembly key 7 and the magazine well, comprises a loader feeler 15. In the presence of a loader, the feeler 15 arranged at one end of the slide and able to penetrate into the loader well, prevents any rearward movement of the slide 8. This slide then supports its other end on an eccentric element 20 of the disassembly key 7. This eccentric element 20 is arranged on the disassembly key 7 so that, when a charger is present, the slide 8, blocked by the charger, prevents rotation of the disassembly key.

On the contrary, when the magazine well is empty, the feeler 15 is free to move back into the magazine well, the eccentric 20 pushing the slide 8 backwards, allowing the rotation of the disassembly key.

Advantageously, the disassembly key comprises a tenon 14 (or comprises a half-moon or asymmetrical section) bearing under the slide and preventing the rotation of the disassembly key. A housing 4 under the slide 2 allows the rotation of the disassembly key only when the slide occupies a predetermined rear position. This position preferably corresponds to the rear position when the slide is blocked by a slide stop, making it simpler to maintain this position. This position is illustrated in figure 2 . The presence of this tenon 14 therefore makes it possible to ensure that no ammunition is chambered, the backward movement ensuring the ejection of any ammunition.

• Retrait d'un éventuel chargeur, libérant ainsi la translation du coulisseau 8 ;
• Recul de la glissière 2 sur l'arrêtoir de glissière ;
• Extraction partielle de la clé de démontage 7 pour sortir le tenon 13 de la mortaise 21 ;
• Rotation de la clé de démontage jusqu'à une position où l'épaulement de la clé de démontage n'est plus face au coulisseau de sécurité ;
• Extraction complète de la clé de démontage ;
• Coulissement vers l'avant de la glissière puis, selon le type de pistolet, vers le haut pour la désengager du châssis.

the dismantling procedure then includes the following steps:

• Removal of a possible magazine, thus freeing the translation of the slide 8;
• Retraction of slide 2 on the slide stop;
• Partial extraction of the disassembly key 7 to remove the tenon 13 from the mortise 21;
• Rotation of the disassembly key to a position where the shoulder of the disassembly key is no longer facing the safety slide;
• Complete extraction of the disassembly key;
• Slide forwards on the slide then, depending on the type of gun, upwards to disengage it from the frame.

Advantageously, the external face of the slide 8 comprises an inclined external sliding surface 9, making it possible to push the slide 8 backwards when inserting the disassembly key into its housing. It is interesting to note that, in this case, the disassembly key can be replaced even if the slide is in position, in the breech closed position. In fact, it is then not necessary to turn the disassembly key.

Claims (8)

Gun comprising a device for protection against disassembly which comprises a disassembly key (7) rotatably arranged in a frame (18) and capable of being manually rotated between an angular locking position and an angular disassembly position, and said disassembly key capable of occupy a transverse position of rest and a transverse position of rotation, said disassembly key (7) comprising locking means (13) cooperating with complementary locking means (21) on the chassis in order to prevent rotation of the key disassembly (7) towards the angular disassembly position when said disassembly key occupies the transverse rest position. Gun according to claim 1 in which the locking means (13,21) are of the tenon and mortise type. Pistol according to one of the preceding claims comprising a slide (2) sliding on a slide rail (22) fixed to the frame (18) between a firing position and a rear reloading position, said slide comprising under its lower surface, a housing (4), the disassembly key (7) comprising an eccentric tenon (14) bearing under the slide, said eccentric tenon (14) allowing the rotation of the disassembly key (7) only when said housing (4) is positioned facing said eccentric tenon (14). Gun (1) according to one of the preceding claims in which the disassembly key comprises two indexing grooves on which can rest a slide (8) held against the disassembly key by a spring (16) said slide (8) ) bearing on the first indexing groove (11) when the disassembly key occupies the transverse position of rest and bearing on the second indexing groove (12) when the disassembly key occupies the transverse position of rotation. Gun according to claim 4 in which the second indexing groove (12) has a discontinuous straight internal flank (17), preventing the extraction of the disassembly key (7) by bearing on a straight internal flank (10) of the slide (8) when the disassembly key is in the angular locking position, and allowing the extraction of the disassembly key (7) when it is in the angular disassembly position. Gun according to claim 5 in which the indexing grooves (11,12) are arranged on an eccentric element (20) relative to the axis of the disassembly key (7), the slide (8) comprising a feeler ( 15) entering the magazine well, the eccentric element preventing the rotation of the disassembly key (7). Gun according to one of claims 4 to 6 in which the slide (8) has an inclined external face (9) making it possible to move the slide (8) when inserting the disassembly key (7) towards its position. rest, without rotation. Gun according to one of the preceding claims in which a barrel (5) is fixed to the frame (18) via the axis (19) of the disassembly key (7) passing through a slot fixed under the barrel (5).

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