CZ2024166A3 - A universal interface to attach a collimator to a gun - Google Patents

Abstract

A universal interface for mounting a collimator on a pistol, comprising a surface (134) arranged on the upper side of the breech (100) and provided with at least two threaded holes (120) for mounting screws (129) of the collimator (127, 138) or a mounting plate (140) of the collimator. Two grooves (124) are arranged on opposite edges of the surface (134) for accommodating pins (114). The grooves (124) are inclined in a plane (134) obliquely backwards. The grooves (124) have parallel sides (126) for guiding the pins (114) and a flat bottom, and in the region of the closed end of the groove (124) a recessed inclined surface (125) of the groove is arranged, inclined downwards and facing the pin (114). Each pin (114) includes a plate (157) with side surfaces (158) for guidance in the groove (124) and on the upper side of the plate (157) of the pin is arranged a cylindrical projection (156) for insertion into the collimator (127) or into the collimator mounting plate (140). On the lower side of the plate (157) of the pin is arranged a shaped projection (160) with an inclined surface (159) of the pin for abutting on the corresponding inclined surface (125) of the groove. In the mounted state, there is contact between the inclined surface (125) of the groove and the inclined surface (159) of the pin and simultaneously between the side surfaces (158) of the plate (157) and the sides (126) of the groove (124).

Description

Universal interface for mounting a collimator on a pistol

Technical field

The invention relates to a universal interface for mounting a collimator on a pistol, comprising a surface arranged on the upper side of the breech and provided with at least two threaded holes for collimator mounting screws or collimator mounting plates.

State of the art

A collimator, or reflex sight, is an optical device that is attached to a weapon before or instead of classic sights and makes aiming easier. The collimator replaces the rear sight and front sight of a weapon and is used for quick and accurate aiming of the weapon at a shorter distance. A red dot or ring usually shines in the middle of the collimator. The shooter must place the light point on the target when aiming.

Known systems for attaching collimators to pistols do not eliminate manufacturing play between the collimator and the slide. This can cause vibrations during shooting, up to and including the possible destruction of the mounting elements.

Published application US 20240027163 AI describes mounting the collimator via a replaceable plate inserted into the receiver. The disadvantage is the complexity of this plate and the inability to independently change the rear sight.

Published patent application US 2021270572 AI describes the collimator always being mounted via an inserted plate secured with screws. The disadvantage is the inability to center the collimator and eliminate the collimator mounting play. When replacing the collimator with a different type, the entire plate must be replaced.

Published patent application EP 3869141 AI describes the mounting of a collimator via a plate that has an integrated sight. The disadvantage is the high installation of this system and the inability to replace the sight. Another disadvantage is the need to dismantle the entire plate when switching to a different type of collimator.

Springfield Armory uses a point contact to attach the collimator on the Echelon rifle, the disadvantage of which is faster wear of the pins.

The aim of the invention is to design such an interface for mounting a collimator on a pistol that would allow mounting collimators from different manufacturers that have different designs of connecting elements.

The essence of the invention

The above-mentioned object is achieved by a universal interface for mounting a collimator on a pistol, comprising a surface arranged on the upper side of the breech and provided with at least two threaded holes for fixing screws of the collimator or the collimator mounting plate, according to the invention, the essence of which lies in the fact that two grooves for accommodating pins are arranged on the opposite edges of the surface. The grooves are inclined in a plane obliquely backwards and have parallel sides for guiding the pins and a flat bottom, and in the region of the closed end of the groove a recessed inclined surface of the groove is arranged, inclined downwards and oriented facing the pin. Each pin includes a plate with side surfaces for guiding in the groove, and a cylindrical projection is arranged on the upper side of the pin plate for insertion into the collimator or into the collimator mounting plate. On the underside of the pin plate, a shaped protrusion with an inclined pin surface is arranged for seating on the corresponding inclined pin surface.

- 1 CZ 2024 - 166 A3 groove surface. In the mounted state, there is contact between the pin and the groove between the inclined surface of the groove and the inclined surface of the pin and simultaneously between the side surfaces of the pin plate and the sides of the groove.

The universal interface according to the invention allows easy mounting of more than thirty different types of collimators that are commercially available on the market without the use of an additional plate, thereby achieving a lower placement of the collimators for more accurate shooting, reducing the overall height of the pistol with the collimator, and moving the sight lower to the muzzle.

Another advantage is that the oblique arrangement of the grooves for locating the pins limits the lateral and front-to-rear clearances between the breech and the collimator, while also increasing the frictional force acting against upward movement. This eliminates inaccuracies in the collimator mounting dimensions, which otherwise have a major impact on shooting accuracy.

According to a preferred embodiment, at least one pair of holes for inserting cylindrical pins is arranged in the rear area of the surface.

Clarification of drawings

The invention will be described in more detail with several examples of the universal interface for mounting collimators on a pistol according to the invention, shown in the attached drawings, in which the individual images represent:

Fig. 1 the pistol's breech, above which are shown four sets of pins for connecting various collimators;

Fig. 2 is a top view of the closure of Fig. 1;

Fig. 3 detail of the groove for accommodating the pin;

Fig. 4 is an exploded view of the breech with a collimator;

Fig. 5 is an exploded view of a breech block with a collimator mounted on a mounting plate;

Fig. 6 detail of the mounting plate;

Fig. 7 is a cross-section of the breech block and collimator at the location of the inserted pin;

Fig. 8 pin in top view;

Fig. 9 pin in axonometric view partially from above; and Fig. 10 pin in axonometric view partially from below.

Examples of implementation of the invention

A pistol receiver 100 is shown in Fig. 1, which is attached to the frame of a pistol (not shown). For simplicity, not all functional elements for forming a finished firearm are shown on the receiver 100.

The slide 100 has a front sight 117 on the upper side and a rear sight 118 on the rear. The slide 100 also has a universal interface arranged on the upper side for attaching various designs of collimators from various manufacturers.

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The universal interface for mounting collimators according to Figs. 1 and 2 includes a surface 134 arranged on the upper side of the breech 100 (see Figs. 1, 2) and provided with threaded holes 120 for mounting screws 129 of collimators 127 or mounting plates 140 of collimators 138.

In the rear part of the surface 134, two holes 121 for cylindrical pins 115 are further arranged, configured according to the respective holes in the collimators 127 or in the mounting plate 140 of the collimators 138.

In the front part of the surface 134, two grooves 124 are arranged on opposite edges of the surface 134 for accommodating pins 114. The grooves 124 are inclined in plane 134 obliquely backward (see e.g. Figs. 1 and 2) and have parallel sides 126 for guiding pins 114 and a flat bottom.

In the region of the closed end of the groove 124, a recessed inclined groove surface 125 is arranged, inclined downwards and facing the direction of insertion of the pin 114 (see Fig. 3).

In Fig. 1, four pairs of pins 114 are shown one above the other above the grooves 124, the specific dimensions of which are adapted to specific collimators available on the market.

The basic shapes of all pins 114 are, however, the same (see Figs. 8, 9 and 10). Each pin 114 comprises a plate 157 with side surfaces 158 for guidance in the groove 124 and on the upper side of the plate 157 is arranged a cylindrical projection 156 for insertion into the collimators 127 or into the mounting plate 140 of the collimators 138. On the lower side of the plate 157 is arranged a shaped projection 160 with an inclined surface 159 of the pin for abutting on the corresponding inclined surface 125 of the groove 124.

In the mounted state (see Fig. 7) there is contact between the pin 114 and the groove 124 between the inclined surface 125 of the groove and the inclined surface 159 of the pin and simultaneously between the side surfaces 158 of the plate 157 and the sides 126 of the groove 124. In Fig. 7 it can be seen that there is a clearance 155 between the pin 114 and the collimator 127. There is a clearance 149 between the breech block 100 and the collimator 127 and there is a clearance 150 between the pin 114 and the breech block 100. which allows the pin 114 to drop. The collimator 127. or the mounting plate 140 of the collimators 138 rests on the pin 114 on the contact surface 153. which is also affected by the force Fl. arising after tightening the fastening screws 129.

The assembly of the collimators 127 on the breech block 100 is shown in Fig. 4. Cylindrical pins 115 are inserted into the respective holes 121 and corresponding pins 114 are inserted into the grooves 124, the cylindrical projections 156 of which correspond to the openings on the lower surface of the collimators 127. Then, fastening screws 129 are threaded through the openings 133 in the collimators 127 and screwed into the threaded openings 120 in the surface 134. Tightening the fastening screws 129 creates an axial force F0, which induces a force Fl on the contact surface 153 between the pin 114 and the collimator 127. The force Fl on the contact surface 153 between the pin 114 and the collimator 127 causes a shift of the inclined surface 159 on the shaped projection 160 pin 114 along inclined surface 125 groove 124.

The pin 114 is moved until the clearance between the pin 114 and the collimator 127 is defined. The state after tightening the fastening screws 129 is shown in cross-section in Fig. 7.

Thanks to the oblique arrangement of the grooves 124 for the pins 114, the lateral clearances and the front-rear clearances are simultaneously defined, thanks to which the collimator 127 is perfectly connected to the slide 100.

When the pin 114 is moved along the inclined surface 125 of the groove, it is lowered downwards (see Fig. 7), in the extreme case up to the definition of the clearance 150 between the pin 114 and the breech 100. However, this would only occur in the case of an extreme difference in the sizes of the lower holes 131 in the collimators 127.

By moving the pin 114Chvba! Source of references not found, along the inclined surface 125 of the groove, the clearance 149 between the breech 100 and the collimator 127 is reduced. This clearance 149 can be seen in the front part when looking at the breech 100 from the side.

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The cylindrical projection 156 of the pin 114 has a designed height so that after being fitted into the collimator 127, a clearance 155 remains between the pin 114 and the collimator 127 and force transmission occurs on the contact surface 153. In an extreme case, due to impurities or inaccurate production, the clearance 155 could be limited and in this case the force transmission would occur by force F1 precisely at this location, where the contact surface 153 would move.

After mounting the collimator 127 on the pistol, it is possible to aim at the target using the transparent collimator glass 128 and the illuminated dot 130.

Fig. 5 shows the assembly of the collimator 138 on the breech 100 using the mounting plate 140, which is separately shown in the axonometric view in Fig. 6. Such a collimator 138 with the mounting plate 140 uses an oblique dovetail groove 148 for fixation on the breech 100, on which a wedge 139 rests, which is firmly attached with a wedge screw 144. The mounting plate 140 is mounted on a pair of pins 114 into holes 143 in the mounting plate 140. For firm fixation of the mounting plate 140, a pair of fastening screws 129 must be tightened.

This system of attaching the collimator 138 to the mounting plate 140 was promoted by the manufacturers as very rigid, but the mounting plate 140 raises the collimator 138 higher, which is undesirable. When attaching without the mounting plate 140, only to the pins 114 and cylindrical pins 115, which also create a very rigid connection with the slide 100, users who purchase a new collimator may no longer prefer a collimator mounted on the mounting plate 140 just for the advantage of a stiffer connection, but can choose from a wide range of collimators that are mounted directly to the pins 114 and cylindrical pins 115, and are usually located lower. The advantage of a lower-mounted collimator is that in the event of a collimator failure (breakage, dead battery), it is possible to aim better through the collimator glass 128 with fixed sights 117. 118.

Claims (2)

1. A universal interface for mounting a collimator on a pistol, comprising a surface (134) arranged on the upper side of the breech (100) and provided with at least two threaded holes (120) for fastening screws (129) of the collimator (127, 138) or a mounting plate (140) of the collimator, characterized in that two grooves (124) are arranged on opposite edges of the surface (134) for accommodating pins (114), wherein the grooves (124) are inclined in a plane (134) obliquely backward and the grooves (124) have parallel sides (126) for guiding the pins (114) and a flat bottom, and in the region of the closed end of the groove (124) a recessed inclined surface (125) of the groove is arranged, inclined downwards and oriented facing the pin (114), wherein each pin (114) includes a plate (157) with side surfaces (158) for guidance in the groove (124) and on the upper side of the plate (157) of the pin a cylindrical projection (156) is arranged for insertion into the collimator (127) or into the mounting plate (140) of the collimator and on the lower side of the plate (157) of the pin a shaped projection (160) is arranged with an inclined surface (159) of the pin for abutting on the corresponding inclined surface (125) of the groove, whereby in the mounted state between the pin (114) and the groove (124) there is contact between the inclined surface (125) of the groove and the inclined surface (159) of the pin and simultaneously between the side surfaces (158) of the plate (157) and the sides (126) of the groove (124). 2. Universal interface according to claim 1, characterized in that at least one pair of holes (121) for inserting cylindrical pins (115) is arranged in the rear region of the surface (134).