Trigger with incrementally adjustable trigger weight for weapons of the ar-type

Abstract

A trigger with incrementally adjustable trigger weight for a weapon of the AR-type. The trigger blade has at least one opening, which opening has a step and the step has at least two ledges with different depths. A switching shaft which has a first cylindrical section, at least one extension and a second cylindrical section is guided rotatably and axially displaceably in the opening. The switching shaft is pressed with its at least one bearing shoulder against the step or into one of the at least two ledges of different depths through a force of a trigger spring which is supported on a bottom surface in a trigger housing or on a bottom of a lower housing part of the weapon.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority under 35 U.S.C. § 119 of German Utility Model Application No. 202023002427.7, filed Nov. 21, 2023, the entire disclosure of which is expressly incorporated by reference herein.BACKGROUND OF THE INVENTION1. Field of the Invention

[0002] The present invention relates to a trigger with incrementally adjustable trigger weight for weapons of the AR-type.2. Discussion of Background Information

[0003] Firearms are generally equipped with a release mechanism in the form of a trigger, so that they are able to fire a shot. The trigger typically has a trigger blade that is operated with the index finger. In order to release the trigger, the trigger blade must be pulled backwards with the index finger, against the firing direction, using a certain amount of force until the shot is fired.

[0004] The term “trigger weight” is commonly used in technical language as an equivalent for the force required in order to fire the shot; this is specified in grams (g) or kilograms (kg). In English-speaking countries, the unit lb or lbs (plural) is often used for the US / British weight measure of the pound. The trigger weight, also referred to as the trigger pull, is a measure of the force that a marksman must apply to the trigger blade, in order to fire a firearm.

[0005] If the marksman has to apply a force of, for example, 10 Newton (N) in order to release the trigger, this corresponds to a trigger weight of approximately 1000 g. 1000 g is equivalent to 9.81 N in precise physical terms. However, for simplicity's sake, it is rounded off to 10 N for 1000 g.

[0006] Firearms are used in a wide variety of fields. These include, for example, hunting, target shooting or also military use. A sport marksman typically prefers a trigger with a very low trigger weight. The lower the trigger weight the greater the accuracy when shooting. However, in shooting regulations, certain minimum requirements for the trigger weight are often specified, such as 1000 g or 1500 g, for example. In military use, in assault rifles, on the other hand, trigger weights in the range of about 2000 g to about 4500 g are common, as a higher trigger weight improves safety. A military precision marksman in turn works with lower trigger weights in similar ranges as the sport marksman.

[0007] It is advantageous if the trigger weight can be adjusted or set to adapt it to the prevailing requirements or the needs of the marksman.

[0008] In the afore-mentioned applications, firearms of the AR-10 or AR-15 type are often used. Their development in the 1950s is attributed to Eugene Stoner for the company Armalite. The abbreviation AR originally stood for “Armalite Rifle.” This type comprises semi-automatic rifles which, in their civilian version, are designed as semi-automatic and, in their military version, are sometimes also used as a fully automatic variant. In a semi-automatic weapon, the trigger has to be pulled again for each shot. In the fully automatic variant, however, the weapon can be switched to continuous fire.

[0009] Today, many manufacturers of this type of weapon no longer refer to their firearms as AR-10 or AR-15, but market their models under their own designations. However, almost all firearms of the AR-10 or AR-15 type have in common that they are equipped with a trigger that is installed in the weapon's housing by means of two cylindrical pins. A distinction is made between triggers with and without their own trigger housing. In triggers without their own trigger housing, the hammer and trigger blade are installed directly in the weapon housing by means of the cylindrical pins. The housings of this type of weapon also have in common that the upper and lower parts of the housing are connected to one another by means of two additional pins. If the rear of these two pins is pulled out to the stop, the upper part of the housing can be folded down over the front pin, which acts like a hinge, making the trigger accessible from above. These design features have been retained since the 1950s.

[0010] In the following text, for simplification, the term “weapons of the AR type” will be used instead of “weapons of the AR-10 or AR-15 type”.

[0011] The terms “left”, “right”, “top” and “bottom” refer to the marksman's line of sight with the weapon at the ready. This line of sight runs along the barrel towards the muzzle. The terms “cocked trigger” or “cocked hammer” describe the same state in the following text: if the hammer is in the cocked state, the trigger as a whole is also in the cocked state, and vice versa. The same applies to the terms “released trigger” and “released hammer.”

[0012] For AR-type weapons, various triggers are available in which the trigger weight can be adjusted or set. A distinction is made between a continuously and an incrementally adjustable trigger weight.

[0013] A continuous adjustment is usually made by turning an adjustment screw on the trigger. The adjustment screw acts on a trigger spring which is pre-compressed to a greater or lesser extent. This results in a smaller or larger trigger weight. The disadvantage of continuous adjustment is that the size of the set trigger weight cannot be known or read. In order to be able to determine or measure the size of the trigger weight, so-called trigger scales are used. Trigger scales are available with either a mechanical or electronic display. To determine the trigger weight, the weapon must be securely clamped and the barrel aligned horizontally. The measuring rod of the trigger scale must then be placed on the trigger blade and the trigger thereby pulled. The trigger weight can then be read on the display unit of the trigger scale.

[0014] If a minimum trigger weight of 1000 g, for example, is required by shooting regulations, another possible way of checking it is to fix the weapon with the barrel pointing vertically upwards, carefully hang a weight of 1000 g on the trigger blade and wait to see if the trigger is released or not. If the trigger is released, the 1000 g is not sufficient. If it is not released, the trigger weight is greater than 1000 g. However, this method cannot be used to determine the trigger weight that actually exists.

[0015] The possibility of setting the trigger weight in steps by turning an adjustment screw that is equipped with a click or detent function has the same disadvantage as a continuous adjustment, namely that the size of the set trigger weight is not known or cannot be read.

[0016] Another possible way of being able to set the trigger weight in steps is to replace the trigger spring or trigger springs. Differently designed springs with a smaller or larger wire diameter, for example, result in different spring forces and therefore different trigger weights. For easier distinction, manufacturers colour-code the springs, each colour being assigned to a specific trigger weight. The disadvantage that has emerged is that replacing the springs is relatively time-consuming and not every user has the skills and knowledge to carry out the replacement themselves. In many designs available on the market, the trigger must be removed from the weapon housing to replace the springs. Furthermore, the springs or their securing screws can be lost during replacement.

[0017] In many cases, the user does not have the ability to adjust the trigger weight. This can lead to dangers, such as accidental discharge when the trigger weight is set far too low. So-called “doubling” can also occur. This refers to the firing of multiple shots from a semi-automatic weapon with just one trigger movement.

[0018] Therefore, there is a need for a trigger for AR-type weapons, in which the trigger weight can be adjusted or set by the user in the simplest way possible, with the set trigger weight being clearly traceable or readable without the need for an additional measuring device such as a trigger scale or other tools like a weight, for example. The trigger should not need to be removed from the weapon housing for adjustment or setting. Furthermore, no individual parts that can be lost should be involved in the adjustment process.

[0019] In the prior art, there is no known trigger for AR-type weapons that meets these criteria.

[0020] US 2023 / 0088105 A1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons that is equipped with an adjustment screw for incremental adjustment of the trigger weight. The trigger has increments in the form of at least one lateral recess on the adjustment screw, into which a spring engages. The set trigger weight cannot be read or determined without a measuring device or an additional tool.

[0021] DE 20 2015 101 485 U1, the entire disclosure of which is incorporated by reference herein, discloses a trigger that is equipped with an adjustment element that can be operated from the side using a standard internal hex key, for incremental adjustment of the trigger weight. The adjustment element is provided with multiple adjustment surfaces distributed in the circumferential direction for adjusting the preload of the trigger spring. If a trigger of this design were installed in AR-type weapons, the trigger would need to be removed from the weapon housing to access the adjustment element.

[0022] US 2012 / 0180356 A1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons, in which the desired trigger weight is adjusted by replacing springs. The manufacturer usually supplies the triggers with additional springs to allow different trigger weights to be set. Although the trigger does not need to be removed from the weapon housing to replace the springs, the work requires manual skill and involves parts that can be lost in the process, such as the springs themselves and the retainer that holds the springs in position.

[0023] DE 20 2023 102 920 U1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons, in which the desired trigger weight can be adjusted by means of two adjustment screws that pre-compress springs arranged in series to a greater or lesser extent. It is proposed that both adjustment screws should be evenly set. In addition, it is proposed that the trigger force should be influenced by replacing the springs. The trigger does not need to be removed from the weapon housing to adjust the trigger weight, as the adjustment screws are accessible from above. Markings are proposed on the housing, which should be placed in the region of the bores in which the adjustment screws and the springs are installed. Users are often overwhelmed by the complexity of the adjustment process. Furthermore, parts that can be lost are involved in the spring replacement process. The proposed markings in the region of the bores can help users to trace the amount of adjustment travel. However, the trigger weight that has been set cannot be read. A measuring device or additional tool is necessary for this purpose. It is also proposed to read the amount of the trigger weight based on the screw-in depth of the adjustment screws. A table is provided for this purpose, in which possible screw-in depths are assigned to specific trigger weights. However, in order to be able to determine the screw-in depth, a measuring device, such as a caliper, for example, which is equipped with a depth gauge, is needed.

[0024] In view of the foregoing, it would be advantageous to have available a trigger for AR-type weapons, wherein the trigger weight can be adjusted or set by the user in the simplest way possible, wherein the set trigger weight is clearly traceable or readable without the need for an additional measuring device such as a trigger scale or other aids such as a weight, for example. The trigger should not need to be removed from the weapon housing for adjustment or setting. Furthermore, no individual parts that can be lost should be involved in the adjustment process.SUMMARY OF THE INVENTION

[0025] In a trigger according to the invention, the trigger blade has at least one opening, wherein the opening has a step and wherein the step has at least two ledges with different depths, and wherein a switching shaft which has a first cylindrical section, at least one extension and a second cylindrical section is guided rotatably and axially displaceably in the opening and wherein the switching shaft is pressed with its at least one bearing shoulder against the step or into one of the at least two ledges of different depths through the force of a trigger spring which is supported on a bottom surface in the trigger housing or on the bottom of the lower housing part of the weapon.

[0026] In a particularly preferred embodiment of the invention, the first cylindrical section of the switching shaft has a drive for an operating tool. This drive is preferably designed as a Torx® drive.

[0027] In a particularly preferred embodiment of the invention, the trigger is provided with markings that indicate the set trigger weight.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Embodiments of the invention are described below with reference to the appended drawings. Neither the description nor the drawings are to be understood as a restriction of the scope of the invention.

[0029] In the drawings:

[0030] FIG. 1 shows an AR-type weapon with the trigger installed, in a perspective view,

[0031] FIG. 2 shows the AR-type weapon with the upper housing part folded down, without a trigger installed, in a perspective view,

[0032] FIG. 3 shows the AR-type weapon with the upper housing part folded down, with a trigger installed, hammer in the released position, in a perspective view,

[0033] FIG. 4 shows a trigger in the assembled state, hammer in the released position, in a perspective view,

[0034] FIG. 5 shows the trigger in an exploded view, hammer in the released position, in a perspective view,

[0035] FIG. 6 shows the trigger, hammer in the cocked position, trigger blade in the starting position, in a half-section, viewed from the left,

[0036] FIG. 7 shows the trigger, hammer in the cocked position, latch surfaces released, in a half-section, viewed from the left,

[0037] FIG. 8 shows the trigger, hammer in the released position, trigger blade in the fully actuated state, in a half-section, viewed from the left,

[0038] FIG. 9 shows a trigger blade, in a half-section, viewed from the left,

[0039] FIG. 10 shows the trigger blade, viewed in direction A,

[0040] FIG. 11a shows a switching shaft, in a perspective view,

[0041] FIG. 11b shows the switching shaft, in a perspective view,

[0042] FIG. 12a shows the trigger blade, the switching shaft in a first switching position and a trigger spring, in a half-section, viewed from the left,

[0043] FIG. 12b shows the trigger blade, the switching shaft in a second switching position and the trigger spring, in a half-section, viewed from the left,

[0044] FIG. 12c shows the trigger blade, the switching shaft during the switching process and the trigger spring, in a half-section, viewed from the left,

[0045] FIG. 13 shows the trigger, hammer in the released position, viewed from above.DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0046] The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description in combination with the drawings making apparent to those of skill in the art how the several forms of the present invention may be embodied in practice.

[0047] In the following text, elements that are identical in construction but installed multiple times in different places are distinguished from one another with the help of a letter index. For example, the subassembly of the trigger shaft is referred to with reference number 13 in the list of reference signs and in the explanatory text a distinction is made between the front subassembly 13a and the rear subassembly 13b, as they are installed in different locations.

[0048] The same applies to elements that are divided into sub-elements based on the geometry of the component. In the list of reference signs, for example, the ledge 32 is named, and in the explanatory text, a distinction is made between the two sub-ledges 32a and 32b which arise because the small cylindrical section 31 passes through the ledge 32.

[0049] FIG. 1 shows an AR-type weapon 3. The upper housing part 2 and the lower housing part 5 are connected by means of the rear housing pin 1 and the front housing pin 4. A trigger 8 according to the invention is installed in the lower housing part 5, with the trigger blade 15 protruding downwards from the lower housing part 5.

[0050] FIG. 2 shows an AR-type weapon 3 without a trigger 8 installed. The rear housing pin 1 is pulled out to the stop and the upper housing part 2 is folded away from the lower housing part 5 over the front housing pin 4 as far as possible. The front cross-bore 6 and the rear cross-bore 7 in the lower housing part 5 are also visible.

[0051] FIG. 3 shows an AR-type weapon 3 with the trigger 8 installed. The hammer 9 is in the released position and protrudes almost vertically upwards from the lower housing part 5. The trigger 8 is fixed in the front cross-bore 6 and rear cross-bore 7 (see FIG. 2) by means of the two left bearing pins 10a, 10b and the two right bearing pins 11a, 11b. The two right bearing pins 11a and 11b are on the right side and are therefore not visible in FIG. 3 and also in FIGS. 4 and 5.

[0052] FIG. 4 shows a trigger 8 according to the invention in the assembled state. The hammer 9 is located in the released position. The trigger blade 15 of the trigger 8 protrudes downwards from the trigger housing 14. Also visible are the hammer spring 17, the switching shaft 18 and the disconnector 16. The function of the disconnector 16 is not explained in greater detail here, as it is irrelevant to the further explanations. The two left bearing pins 10a and 10b, as well as the two right bearing pins 11a and 11b, are extended laterally out of the subassemblies of the trigger shafts 13 by means of a thread drive not explained in greater detail (see also FIG. 5). This position of the bearing pins 10a, 10b and 11a, 11b allows the trigger 8 to be fixed in the lower housing part 5 and is shown again in FIG. 13.

[0053] FIG. 5 shows the individual parts of the trigger 8. The two subassemblies of the trigger shaft 13a and 13b are installed in the trigger housing 14. The hammer 9 is rotatably mounted on the front subassembly of the trigger shaft 13a and the trigger blade 15 is mounted on the rear subassembly of the trigger shaft 13b. The hammer 9 has the latch surface 19 and the trigger blade 15 has the latch surface 20. The two left bearing pins 10a and 10b, as well as the two right bearing pins 11a and 11b, are retracted into the subassemblies of the trigger shafts 13 and do not therefore protrude laterally beyond the trigger housing 14. In this position of the bearing pins 10a, 10b, and 11a, 11b, the trigger 8 can be removed from, and reinserted into, the lower housing part 5. The hammer spring 17 is designed as a double-legged spring which is supported by its legs on the hammer 9 and in the trigger housing 14, coils of which are guided on the two laterally projecting extensions on the hammer 9.

[0054] The sequence of pulling the trigger 8 is explained below in FIGS. 6, 7 and 8.

[0055] FIG. 6 shows how, when the trigger 8 is in the cocked state, the force of the hammer spring 17 presses the latch surface 19 of the hammer 9 against the latch surface 20 of the trigger blade 15. The trigger spring 21 is designed as a compression spring and presses against the bottom surface 22 of the switching shaft 18 (see also FIG. 11b) and against the bottom surface 23 in the trigger housing 14.

[0056] In another embodiment which is not shown the entire mechanism of the trigger 9 is not installed in a trigger housing 14 but directly in the lower housing part 5. This means that the trigger spring 21 also acts not on a bottom surface 23 in the trigger housing 14, but directly on the bottom surface in the lower housing part 5.

[0057] The trigger blade 15 is located in its initial position and lies with its rear stop nose 25 resting on the rear stop surface 26 in the trigger housing 14. In order to release the trigger 8 and bring the hammer 9 into the released position, a pulling force must be applied to the finger surface 24 on the trigger blade 15 with the finger, which force is sufficient to compress the trigger spring 21 sufficiently for the two latch surfaces 19 and 20 to be released.

[0058] FIG. 7 shows the trigger 8 still in the cocked state at the point in time when the two latch surfaces 19 and 20 have just been released. At this point, the trigger spring 21 is compressed by the rotational movement of the trigger blade 15 around the rear subassembly of the trigger shaft 13b to such an extent that the trigger weight or trigger force that has been set is applied.

[0059] The hammer spring 17 now accelerates the hammer 9 until it strikes the firing pin, which is not shown and is located in the upper housing part 2.

[0060] FIG. 8 shows the trigger 8 in the released state. Shortly after the two latch surfaces 19 and 20 have been released, the trigger blade 15 reaches the front stop surface 28 in the trigger housing 14 with its front stop nose 27. The rotational movement of the trigger blade 15 around the rear subassembly of the trigger shaft 13b is stopped. With the trigger blade 15 in this position, the trigger spring 21 has not yet reached its solid length. Solid length should be understood to mean the position of a compression spring in which all coils are touching one another and the spring has reached its minimum length.

[0061] It is evident that the desired trigger weight directly depends on the compression of the trigger spring 21 between the two surfaces 22 and 23. The trigger weight or trigger force that has been set is applied in the state shown in FIG. 7.

[0062] FIG. 9 shows the trigger blade 15 in section. An opening is visible, the axis D of which runs at an angle α of 12° to the vertical V in the particularly preferred embodiment of the invention shown and which passes through the trigger blade 15. For better operability of the switching shaft 18, the axis D of the opening is arranged at an angle α≥0° and <90° to the vertical V. The opening consists of a large cylindrical section 29, a step 30 and a small cylindrical section 31. In the step 30, the ledge 32 is visible, consisting of sub-ledges 32a and 32b and the ledge 33 consisting of sub-ledges 33a and 33b, wherein the sub-ledge 33b is not visible in FIG. 9 as it is omitted due to the sectional view.

[0063] It can be seen in FIG. 10 that the first ledge 32 and the second ledge 33 are formed by grooves offset at 90° from one another and executed at different depths (see also FIG. 9). However, any other angle is also conceivable. The step 30, and therefore also the ledges 32 and 33, are penetrated by the small cylindrical section 31. In the particularly preferred embodiment of the invention shown, the number of ledges of different depths is 2. In other embodiments of the invention, which are not shown in the figures, there can be any number of ledges at different depths which do not have to be formed as continuous grooves. It is also sufficient to have only unilaterally radially formed ledges of different depths which are arranged around the central axis of the opening. The number of ledges of different depths is equal to the number of possible switching positions of the switching shaft 18 (see also FIGS. 12a, 12b and 12c).

[0064] The geometry of the switching shaft 18 is apparent from FIGS. 11a and 11b, consisting of a first cylindrical section 34, an extension 35 and a second cylindrical section 36. The second cylindrical section 36 has a bottom surface 22. In the installed state, the trigger spring 21 rests on this bottom surface 22.

[0065] The extension 35 has at least one bearing shoulder 37 facing the first cylindrical section 34. In the particularly preferred embodiment of the invention shown here, the bearing shoulder is divided into two partial surfaces 37a and 37b by the first cylindrical section 34. The two partial surfaces therefore lie at the same height in the axial direction.

[0066] In a particularly preferred embodiment, the first cylindrical section 34 has a Torx® drive 12. In other embodiments of the invention which are not shown the drive can also be designed as a slot, cross-slot, internal hexagon or any other form of drive.

[0067] FIGS. 12a, 12b, and 12c each show the trigger blade 15, the switching shaft 18 and the trigger spring 21. The possible switching positions of the switching shaft 18 are explained in greater detail with the help of these figures.

[0068] FIG. 12a shows how the switching shaft 18 is pressed by the trigger spring 21 against the sub-ledges 33a and 33b of the second ledge 33 with the two partial surfaces 37a and 37b of the bearing shoulder 37 (see also FIGS. 10, 11a and 11b). In this position, the trigger spring 21 is under the least amount of preload and the first cylindrical section 34 of the switching shaft 18 protrudes significantly from the trigger blade 15. This corresponds to the first possible switching position and the lower of the two adjustable trigger weights.

[0069] FIG. 12b shows how the switching shaft 18 is pressed by the trigger spring 21 against the sub-ledges 32a and 32b of the first ledge 32 with the two partial surfaces 37a and 37b of the bearing shoulder 37. In this position, the trigger spring 21 is under less preload and the first cylindrical section 34 of the switching shaft 18 protrudes less from the trigger blade 15 than in the switching position shown in FIG. 12a. This corresponds to the second possible switching position and therefore to the higher of the two adjustable trigger weights.

[0070] In FIG. 12c, the switching shaft 18 is resting against the step 30 with the two partial surfaces 37a and 37b of the bearing shoulder 37. This does not correspond to any of the switching positions but rather to the situation during the switching process, i.e. between the switching positions.

[0071] The following sets forth the preparations and the process of switching between different trigger weights.Preparation1. Pull out the rear housing pin 1 to the stop and fold down the upper housing part 2 from the lower housing part 5.

[0073] 2. If the hammer 9 is still in the cocked position, it must be moved into the released position by actuating the trigger 8, so that the switching shaft 18 becomes accessible.Switching Between Different Trigger Weights1. Insert a matching Torx® key into the Torx® drive 12 of the switching shaft 18 and press it downwards until the trigger spring 21 reaches its solid length.

[0075] 2. Rotate the Switching Shaft 18 by a Few Degrees.

[0076] 3. Release the Torx® key until the partial surfaces 37a and 37b of the bearing shoulder 37 come into contact with the step 30 due to the force of the trigger spring 21.

[0077] 4. Rotate the switching shaft 18 further until the extension 35 engages in one of the two ledges 32 or 33 and the partial surfaces 37a and 37b of the bearing shoulder 37 come into contact with the sub-ledges 32a, 32b or 33a, 33b.

[0078] The rotation of the switching shaft can be performed both anti-clockwise and clockwise.

[0079] In FIGS. 12a and 12b, it is evident that the first cylindrical section 34 of the switching shaft 18 protrudes from the trigger blade 15 to varying degrees, depending on the switching position.

[0080] FIG. 13 shows the trigger 8 from above and the label 38 with a pictogram showing the raised switching shaft 18 and the label 39 with the lowered switching shaft 18 can be seen. With the help of these two labels, the user can clearly assign the present switching position to the corresponding trigger weight. FIG. 13 shows a particularly preferred embodiment of the invention in which two different trigger weights can be selected or switched between. The two labels 38 and 39 are arranged on the trigger housing in such a manner that they are easily readable when the trigger 8 is installed in the lower housing part 5 and the upper housing part 2 is folded down. It is also conceivable to have a greater number of possible switching positions to which the user can assign trigger weights by means of corresponding labels.

[0081] In other embodiments of the invention which are not shown, the labels can be attached in any number to any other points of the trigger 8.

[0082] In another embodiment of the invention, which is not shown, a marking may be provided on the first cylindrical section 34 of the switching shaft 18 that protrudes from the trigger blade 15 which, depending on the switching position, points to corresponding labels. The marking on the switching shaft would rotate around axis D like the hand of a clock during switching operations.

[0083] In another embodiment of the invention, which is not shown, no labelling is applied to the trigger 8. In this case, the meaning of the switching positions can be explained, for example, in a corresponding user manual.LIST OF REFERENCE SIGNS1 Rear housing pin

[0085] 2 Upper housing part

[0086] 3 AR-type weapon

[0087] 4 Front housing pin

[0088] 5 Lower housing part

[0089] 6 Front cross-bore in lower housing part 5

[0090] 7 Rear cross-bore in lower housing part 5

[0091] 8 Trigger

[0092] 9 Hammer

[0093] 10 Left bearing pin

[0094] 11 Right bearing pin

[0095] 12 Torx® drive

[0096] 13 Subassembly of the trigger shaft

[0097] 14 Trigger housing

[0098] 15 Trigger blade

[0099] 16 Disconnector

[0100] 17 Hammer spring

[0101] 18 Switching shaft

[0102] 19 Latch surface of the hammer 9

[0103] 20 Latch surface of the trigger blade 15

[0104] 21 Trigger spring

[0105] 22 Bottom surface of the switching shaft 18

[0106] 23 Bottom surface in the trigger housing 14

[0107] 24 Finger surface on the trigger blade 15

[0108] 25 Rear stop nose

[0109] 26 Rear stop surface

[0110] 27 Front stop nose

[0111] 28 Front stop surface

[0112] 29 Large cylindrical section of the opening in the trigger blade 15

[0113] 30 Step of the opening in the trigger blade 15

[0114] 31 Small cylindrical section of the opening in the trigger blade 15

[0115] 32 First ledge

[0116] 33 Second ledge

[0117] 34 First cylindrical section of the switching shaft 18

[0118] 35 Extension of the switching shaft 18

[0119] 36 Second cylindrical section of the switching shaft 18

[0120] 37 Bearing shoulder

[0121] 38 Label with a pictogram showing raised switching shaft 18

[0122] 39 Label with a pictogram showing lowered switching shaft 18

Examples

Embodiment Construction

[0046]The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description in combination with the drawings making apparent to those of skill in the art how the several forms of the present invention may be embodied in practice.

[0047]In the following text, elements that are identical in construction but installed multiple times in different places are distinguished from one another with the help of a letter index. For example, the subassembly of the trigger shaft is referred to with reference number 13 in the list of reference signs and in the ex...

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority under 35 U.S.C. § 119 of German Utility Model Application No. 202023002427.7, filed Nov. 21, 2023, the entire disclosure of which is expressly incorporated by reference herein.BACKGROUND OF THE INVENTION1. Field of the Invention

[0002] The present invention relates to a trigger with incrementally adjustable trigger weight for weapons of the AR-type.2. Discussion of Background Information

[0003] Firearms are generally equipped with a release mechanism in the form of a trigger, so that they are able to fire a shot. The trigger typically has a trigger blade that is operated with the index finger. In order to release the trigger, the trigger blade must be pulled backwards with the index finger, against the firing direction, using a certain amount of force until the shot is fired.

[0004] The term “trigger weight” is commonly used in technical language as an equivalent for the force required in order to fire the shot; this is specified in grams (g) or kilograms (kg). In English-speaking countries, the unit lb or lbs (plural) is often used for the US / British weight measure of the pound. The trigger weight, also referred to as the trigger pull, is a measure of the force that a marksman must apply to the trigger blade, in order to fire a firearm.

[0005] If the marksman has to apply a force of, for example, 10 Newton (N) in order to release the trigger, this corresponds to a trigger weight of approximately 1000 g. 1000 g is equivalent to 9.81 N in precise physical terms. However, for simplicity's sake, it is rounded off to 10 N for 1000 g.

[0006] Firearms are used in a wide variety of fields. These include, for example, hunting, target shooting or also military use. A sport marksman typically prefers a trigger with a very low trigger weight. The lower the trigger weight the greater the accuracy when shooting. However, in shooting regulations, certain minimum requirements for the trigger weight are often specified, such as 1000 g or 1500 g, for example. In military use, in assault rifles, on the other hand, trigger weights in the range of about 2000 g to about 4500 g are common, as a higher trigger weight improves safety. A military precision marksman in turn works with lower trigger weights in similar ranges as the sport marksman.

[0007] It is advantageous if the trigger weight can be adjusted or set to adapt it to the prevailing requirements or the needs of the marksman.

[0008] In the afore-mentioned applications, firearms of the AR-10 or AR-15 type are often used. Their development in the 1950s is attributed to Eugene Stoner for the company Armalite. The abbreviation AR originally stood for “Armalite Rifle.” This type comprises semi-automatic rifles which, in their civilian version, are designed as semi-automatic and, in their military version, are sometimes also used as a fully automatic variant. In a semi-automatic weapon, the trigger has to be pulled again for each shot. In the fully automatic variant, however, the weapon can be switched to continuous fire.

[0009] Today, many manufacturers of this type of weapon no longer refer to their firearms as AR-10 or AR-15, but market their models under their own designations. However, almost all firearms of the AR-10 or AR-15 type have in common that they are equipped with a trigger that is installed in the weapon's housing by means of two cylindrical pins. A distinction is made between triggers with and without their own trigger housing. In triggers without their own trigger housing, the hammer and trigger blade are installed directly in the weapon housing by means of the cylindrical pins. The housings of this type of weapon also have in common that the upper and lower parts of the housing are connected to one another by means of two additional pins. If the rear of these two pins is pulled out to the stop, the upper part of the housing can be folded down over the front pin, which acts like a hinge, making the trigger accessible from above. These design features have been retained since the 1950s.

[0010] In the following text, for simplification, the term “weapons of the AR type” will be used instead of “weapons of the AR-10 or AR-15 type”.

[0011] The terms “left”, “right”, “top” and “bottom” refer to the marksman's line of sight with the weapon at the ready. This line of sight runs along the barrel towards the muzzle. The terms “cocked trigger” or “cocked hammer” describe the same state in the following text: if the hammer is in the cocked state, the trigger as a whole is also in the cocked state, and vice versa. The same applies to the terms “released trigger” and “released hammer.”

[0012] For AR-type weapons, various triggers are available in which the trigger weight can be adjusted or set. A distinction is made between a continuously and an incrementally adjustable trigger weight.

[0013] A continuous adjustment is usually made by turning an adjustment screw on the trigger. The adjustment screw acts on a trigger spring which is pre-compressed to a greater or lesser extent. This results in a smaller or larger trigger weight. The disadvantage of continuous adjustment is that the size of the set trigger weight cannot be known or read. In order to be able to determine or measure the size of the trigger weight, so-called trigger scales are used. Trigger scales are available with either a mechanical or electronic display. To determine the trigger weight, the weapon must be securely clamped and the barrel aligned horizontally. The measuring rod of the trigger scale must then be placed on the trigger blade and the trigger thereby pulled. The trigger weight can then be read on the display unit of the trigger scale.

[0014] If a minimum trigger weight of 1000 g, for example, is required by shooting regulations, another possible way of checking it is to fix the weapon with the barrel pointing vertically upwards, carefully hang a weight of 1000 g on the trigger blade and wait to see if the trigger is released or not. If the trigger is released, the 1000 g is not sufficient. If it is not released, the trigger weight is greater than 1000 g. However, this method cannot be used to determine the trigger weight that actually exists.

[0015] The possibility of setting the trigger weight in steps by turning an adjustment screw that is equipped with a click or detent function has the same disadvantage as a continuous adjustment, namely that the size of the set trigger weight is not known or cannot be read.

[0016] Another possible way of being able to set the trigger weight in steps is to replace the trigger spring or trigger springs. Differently designed springs with a smaller or larger wire diameter, for example, result in different spring forces and therefore different trigger weights. For easier distinction, manufacturers colour-code the springs, each colour being assigned to a specific trigger weight. The disadvantage that has emerged is that replacing the springs is relatively time-consuming and not every user has the skills and knowledge to carry out the replacement themselves. In many designs available on the market, the trigger must be removed from the weapon housing to replace the springs. Furthermore, the springs or their securing screws can be lost during replacement.

[0017] In many cases, the user does not have the ability to adjust the trigger weight. This can lead to dangers, such as accidental discharge when the trigger weight is set far too low. So-called “doubling” can also occur. This refers to the firing of multiple shots from a semi-automatic weapon with just one trigger movement.

[0018] Therefore, there is a need for a trigger for AR-type weapons, in which the trigger weight can be adjusted or set by the user in the simplest way possible, with the set trigger weight being clearly traceable or readable without the need for an additional measuring device such as a trigger scale or other tools like a weight, for example. The trigger should not need to be removed from the weapon housing for adjustment or setting. Furthermore, no individual parts that can be lost should be involved in the adjustment process.

[0019] In the prior art, there is no known trigger for AR-type weapons that meets these criteria.

[0020] US 2023 / 0088105 A1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons that is equipped with an adjustment screw for incremental adjustment of the trigger weight. The trigger has increments in the form of at least one lateral recess on the adjustment screw, into which a spring engages. The set trigger weight cannot be read or determined without a measuring device or an additional tool.

[0021] DE 20 2015 101 485 U1, the entire disclosure of which is incorporated by reference herein, discloses a trigger that is equipped with an adjustment element that can be operated from the side using a standard internal hex key, for incremental adjustment of the trigger weight. The adjustment element is provided with multiple adjustment surfaces distributed in the circumferential direction for adjusting the preload of the trigger spring. If a trigger of this design were installed in AR-type weapons, the trigger would need to be removed from the weapon housing to access the adjustment element.

[0022] US 2012 / 0180356 A1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons, in which the desired trigger weight is adjusted by replacing springs. The manufacturer usually supplies the triggers with additional springs to allow different trigger weights to be set. Although the trigger does not need to be removed from the weapon housing to replace the springs, the work requires manual skill and involves parts that can be lost in the process, such as the springs themselves and the retainer that holds the springs in position.

[0023] DE 20 2023 102 920 U1, the entire disclosure of which is incorporated by reference herein, discloses a trigger for AR-type weapons, in which the desired trigger weight can be adjusted by means of two adjustment screws that pre-compress springs arranged in series to a greater or lesser extent. It is proposed that both adjustment screws should be evenly set. In addition, it is proposed that the trigger force should be influenced by replacing the springs. The trigger does not need to be removed from the weapon housing to adjust the trigger weight, as the adjustment screws are accessible from above. Markings are proposed on the housing, which should be placed in the region of the bores in which the adjustment screws and the springs are installed. Users are often overwhelmed by the complexity of the adjustment process. Furthermore, parts that can be lost are involved in the spring replacement process. The proposed markings in the region of the bores can help users to trace the amount of adjustment travel. However, the trigger weight that has been set cannot be read. A measuring device or additional tool is necessary for this purpose. It is also proposed to read the amount of the trigger weight based on the screw-in depth of the adjustment screws. A table is provided for this purpose, in which possible screw-in depths are assigned to specific trigger weights. However, in order to be able to determine the screw-in depth, a measuring device, such as a caliper, for example, which is equipped with a depth gauge, is needed.

[0024] In view of the foregoing, it would be advantageous to have available a trigger for AR-type weapons, wherein the trigger weight can be adjusted or set by the user in the simplest way possible, wherein the set trigger weight is clearly traceable or readable without the need for an additional measuring device such as a trigger scale or other aids such as a weight, for example. The trigger should not need to be removed from the weapon housing for adjustment or setting. Furthermore, no individual parts that can be lost should be involved in the adjustment process.SUMMARY OF THE INVENTION

[0025] In a trigger according to the invention, the trigger blade has at least one opening, wherein the opening has a step and wherein the step has at least two ledges with different depths, and wherein a switching shaft which has a first cylindrical section, at least one extension and a second cylindrical section is guided rotatably and axially displaceably in the opening and wherein the switching shaft is pressed with its at least one bearing shoulder against the step or into one of the at least two ledges of different depths through the force of a trigger spring which is supported on a bottom surface in the trigger housing or on the bottom of the lower housing part of the weapon.

[0026] In a particularly preferred embodiment of the invention, the first cylindrical section of the switching shaft has a drive for an operating tool. This drive is preferably designed as a Torx® drive.

[0027] In a particularly preferred embodiment of the invention, the trigger is provided with markings that indicate the set trigger weight.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Embodiments of the invention are described below with reference to the appended drawings. Neither the description nor the drawings are to be understood as a restriction of the scope of the invention.

[0029] In the drawings:

[0030] FIG. 1 shows an AR-type weapon with the trigger installed, in a perspective view,

[0031] FIG. 2 shows the AR-type weapon with the upper housing part folded down, without a trigger installed, in a perspective view,

[0032] FIG. 3 shows the AR-type weapon with the upper housing part folded down, with a trigger installed, hammer in the released position, in a perspective view,

[0033] FIG. 4 shows a trigger in the assembled state, hammer in the released position, in a perspective view,

[0034] FIG. 5 shows the trigger in an exploded view, hammer in the released position, in a perspective view,

[0035] FIG. 6 shows the trigger, hammer in the cocked position, trigger blade in the starting position, in a half-section, viewed from the left,

[0036] FIG. 7 shows the trigger, hammer in the cocked position, latch surfaces released, in a half-section, viewed from the left,

[0037] FIG. 8 shows the trigger, hammer in the released position, trigger blade in the fully actuated state, in a half-section, viewed from the left,

[0038] FIG. 9 shows a trigger blade, in a half-section, viewed from the left,

[0039] FIG. 10 shows the trigger blade, viewed in direction A,

[0040] FIG. 11a shows a switching shaft, in a perspective view,

[0041] FIG. 11b shows the switching shaft, in a perspective view,

[0042] FIG. 12a shows the trigger blade, the switching shaft in a first switching position and a trigger spring, in a half-section, viewed from the left,

[0043] FIG. 12b shows the trigger blade, the switching shaft in a second switching position and the trigger spring, in a half-section, viewed from the left,

[0044] FIG. 12c shows the trigger blade, the switching shaft during the switching process and the trigger spring, in a half-section, viewed from the left,

[0045] FIG. 13 shows the trigger, hammer in the released position, viewed from above.DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0046] The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description in combination with the drawings making apparent to those of skill in the art how the several forms of the present invention may be embodied in practice.

[0047] In the following text, elements that are identical in construction but installed multiple times in different places are distinguished from one another with the help of a letter index. For example, the subassembly of the trigger shaft is referred to with reference number 13 in the list of reference signs and in the explanatory text a distinction is made between the front subassembly 13a and the rear subassembly 13b, as they are installed in different locations.

[0048] The same applies to elements that are divided into sub-elements based on the geometry of the component. In the list of reference signs, for example, the ledge 32 is named, and in the explanatory text, a distinction is made between the two sub-ledges 32a and 32b which arise because the small cylindrical section 31 passes through the ledge 32.

[0049] FIG. 1 shows an AR-type weapon 3. The upper housing part 2 and the lower housing part 5 are connected by means of the rear housing pin 1 and the front housing pin 4. A trigger 8 according to the invention is installed in the lower housing part 5, with the trigger blade 15 protruding downwards from the lower housing part 5.

[0050] FIG. 2 shows an AR-type weapon 3 without a trigger 8 installed. The rear housing pin 1 is pulled out to the stop and the upper housing part 2 is folded away from the lower housing part 5 over the front housing pin 4 as far as possible. The front cross-bore 6 and the rear cross-bore 7 in the lower housing part 5 are also visible.

[0051] FIG. 3 shows an AR-type weapon 3 with the trigger 8 installed. The hammer 9 is in the released position and protrudes almost vertically upwards from the lower housing part 5. The trigger 8 is fixed in the front cross-bore 6 and rear cross-bore 7 (see FIG. 2) by means of the two left bearing pins 10a, 10b and the two right bearing pins 11a, 11b. The two right bearing pins 11a and 11b are on the right side and are therefore not visible in FIG. 3 and also in FIGS. 4 and 5.

[0052] FIG. 4 shows a trigger 8 according to the invention in the assembled state. The hammer 9 is located in the released position. The trigger blade 15 of the trigger 8 protrudes downwards from the trigger housing 14. Also visible are the hammer spring 17, the switching shaft 18 and the disconnector 16. The function of the disconnector 16 is not explained in greater detail here, as it is irrelevant to the further explanations. The two left bearing pins 10a and 10b, as well as the two right bearing pins 11a and 11b, are extended laterally out of the subassemblies of the trigger shafts 13 by means of a thread drive not explained in greater detail (see also FIG. 5). This position of the bearing pins 10a, 10b and 11a, 11b allows the trigger 8 to be fixed in the lower housing part 5 and is shown again in FIG. 13.

[0053] FIG. 5 shows the individual parts of the trigger 8. The two subassemblies of the trigger shaft 13a and 13b are installed in the trigger housing 14. The hammer 9 is rotatably mounted on the front subassembly of the trigger shaft 13a and the trigger blade 15 is mounted on the rear subassembly of the trigger shaft 13b. The hammer 9 has the latch surface 19 and the trigger blade 15 has the latch surface 20. The two left bearing pins 10a and 10b, as well as the two right bearing pins 11a and 11b, are retracted into the subassemblies of the trigger shafts 13 and do not therefore protrude laterally beyond the trigger housing 14. In this position of the bearing pins 10a, 10b, and 11a, 11b, the trigger 8 can be removed from, and reinserted into, the lower housing part 5. The hammer spring 17 is designed as a double-legged spring which is supported by its legs on the hammer 9 and in the trigger housing 14, coils of which are guided on the two laterally projecting extensions on the hammer 9.

[0054] The sequence of pulling the trigger 8 is explained below in FIGS. 6, 7 and 8.

[0055] FIG. 6 shows how, when the trigger 8 is in the cocked state, the force of the hammer spring 17 presses the latch surface 19 of the hammer 9 against the latch surface 20 of the trigger blade 15. The trigger spring 21 is designed as a compression spring and presses against the bottom surface 22 of the switching shaft 18 (see also FIG. 11b) and against the bottom surface 23 in the trigger housing 14.

[0056] In another embodiment which is not shown the entire mechanism of the trigger 9 is not installed in a trigger housing 14 but directly in the lower housing part 5. This means that the trigger spring 21 also acts not on a bottom surface 23 in the trigger housing 14, but directly on the bottom surface in the lower housing part 5.

[0057] The trigger blade 15 is located in its initial position and lies with its rear stop nose 25 resting on the rear stop surface 26 in the trigger housing 14. In order to release the trigger 8 and bring the hammer 9 into the released position, a pulling force must be applied to the finger surface 24 on the trigger blade 15 with the finger, which force is sufficient to compress the trigger spring 21 sufficiently for the two latch surfaces 19 and 20 to be released.

[0058] FIG. 7 shows the trigger 8 still in the cocked state at the point in time when the two latch surfaces 19 and 20 have just been released. At this point, the trigger spring 21 is compressed by the rotational movement of the trigger blade 15 around the rear subassembly of the trigger shaft 13b to such an extent that the trigger weight or trigger force that has been set is applied.

[0059] The hammer spring 17 now accelerates the hammer 9 until it strikes the firing pin, which is not shown and is located in the upper housing part 2.

[0060] FIG. 8 shows the trigger 8 in the released state. Shortly after the two latch surfaces 19 and 20 have been released, the trigger blade 15 reaches the front stop surface 28 in the trigger housing 14 with its front stop nose 27. The rotational movement of the trigger blade 15 around the rear subassembly of the trigger shaft 13b is stopped. With the trigger blade 15 in this position, the trigger spring 21 has not yet reached its solid length. Solid length should be understood to mean the position of a compression spring in which all coils are touching one another and the spring has reached its minimum length.

[0061] It is evident that the desired trigger weight directly depends on the compression of the trigger spring 21 between the two surfaces 22 and 23. The trigger weight or trigger force that has been set is applied in the state shown in FIG. 7.

[0062] FIG. 9 shows the trigger blade 15 in section. An opening is visible, the axis D of which runs at an angle α of 12° to the vertical V in the particularly preferred embodiment of the invention shown and which passes through the trigger blade 15. For better operability of the switching shaft 18, the axis D of the opening is arranged at an angle α≥0° and <90° to the vertical V. The opening consists of a large cylindrical section 29, a step 30 and a small cylindrical section 31. In the step 30, the ledge 32 is visible, consisting of sub-ledges 32a and 32b and the ledge 33 consisting of sub-ledges 33a and 33b, wherein the sub-ledge 33b is not visible in FIG. 9 as it is omitted due to the sectional view.

[0063] It can be seen in FIG. 10 that the first ledge 32 and the second ledge 33 are formed by grooves offset at 90° from one another and executed at different depths (see also FIG. 9). However, any other angle is also conceivable. The step 30, and therefore also the ledges 32 and 33, are penetrated by the small cylindrical section 31. In the particularly preferred embodiment of the invention shown, the number of ledges of different depths is 2. In other embodiments of the invention, which are not shown in the figures, there can be any number of ledges at different depths which do not have to be formed as continuous grooves. It is also sufficient to have only unilaterally radially formed ledges of different depths which are arranged around the central axis of the opening. The number of ledges of different depths is equal to the number of possible switching positions of the switching shaft 18 (see also FIGS. 12a, 12b and 12c).

[0064] The geometry of the switching shaft 18 is apparent from FIGS. 11a and 11b, consisting of a first cylindrical section 34, an extension 35 and a second cylindrical section 36. The second cylindrical section 36 has a bottom surface 22. In the installed state, the trigger spring 21 rests on this bottom surface 22.

[0065] The extension 35 has at least one bearing shoulder 37 facing the first cylindrical section 34. In the particularly preferred embodiment of the invention shown here, the bearing shoulder is divided into two partial surfaces 37a and 37b by the first cylindrical section 34. The two partial surfaces therefore lie at the same height in the axial direction.

[0066] In a particularly preferred embodiment, the first cylindrical section 34 has a Torx® drive 12. In other embodiments of the invention which are not shown the drive can also be designed as a slot, cross-slot, internal hexagon or any other form of drive.

[0067] FIGS. 12a, 12b, and 12c each show the trigger blade 15, the switching shaft 18 and the trigger spring 21. The possible switching positions of the switching shaft 18 are explained in greater detail with the help of these figures.

[0068] FIG. 12a shows how the switching shaft 18 is pressed by the trigger spring 21 against the sub-ledges 33a and 33b of the second ledge 33 with the two partial surfaces 37a and 37b of the bearing shoulder 37 (see also FIGS. 10, 11a and 11b). In this position, the trigger spring 21 is under the least amount of preload and the first cylindrical section 34 of the switching shaft 18 protrudes significantly from the trigger blade 15. This corresponds to the first possible switching position and the lower of the two adjustable trigger weights.

[0069] FIG. 12b shows how the switching shaft 18 is pressed by the trigger spring 21 against the sub-ledges 32a and 32b of the first ledge 32 with the two partial surfaces 37a and 37b of the bearing shoulder 37. In this position, the trigger spring 21 is under less preload and the first cylindrical section 34 of the switching shaft 18 protrudes less from the trigger blade 15 than in the switching position shown in FIG. 12a. This corresponds to the second possible switching position and therefore to the higher of the two adjustable trigger weights.

[0070] In FIG. 12c, the switching shaft 18 is resting against the step 30 with the two partial surfaces 37a and 37b of the bearing shoulder 37. This does not correspond to any of the switching positions but rather to the situation during the switching process, i.e. between the switching positions.

[0071] The following sets forth the preparations and the process of switching between different trigger weights.Preparation1. Pull out the rear housing pin 1 to the stop and fold down the upper housing part 2 from the lower housing part 5.

[0073] 2. If the hammer 9 is still in the cocked position, it must be moved into the released position by actuating the trigger 8, so that the switching shaft 18 becomes accessible.Switching Between Different Trigger Weights1. Insert a matching Torx® key into the Torx® drive 12 of the switching shaft 18 and press it downwards until the trigger spring 21 reaches its solid length.

[0075] 2. Rotate the Switching Shaft 18 by a Few Degrees.

[0076] 3. Release the Torx® key until the partial surfaces 37a and 37b of the bearing shoulder 37 come into contact with the step 30 due to the force of the trigger spring 21.

[0077] 4. Rotate the switching shaft 18 further until the extension 35 engages in one of the two ledges 32 or 33 and the partial surfaces 37a and 37b of the bearing shoulder 37 come into contact with the sub-ledges 32a, 32b or 33a, 33b.

[0078] The rotation of the switching shaft can be performed both anti-clockwise and clockwise.

[0079] In FIGS. 12a and 12b, it is evident that the first cylindrical section 34 of the switching shaft 18 protrudes from the trigger blade 15 to varying degrees, depending on the switching position.

[0080] FIG. 13 shows the trigger 8 from above and the label 38 with a pictogram showing the raised switching shaft 18 and the label 39 with the lowered switching shaft 18 can be seen. With the help of these two labels, the user can clearly assign the present switching position to the corresponding trigger weight. FIG. 13 shows a particularly preferred embodiment of the invention in which two different trigger weights can be selected or switched between. The two labels 38 and 39 are arranged on the trigger housing in such a manner that they are easily readable when the trigger 8 is installed in the lower housing part 5 and the upper housing part 2 is folded down. It is also conceivable to have a greater number of possible switching positions to which the user can assign trigger weights by means of corresponding labels.

[0081] In other embodiments of the invention which are not shown, the labels can be attached in any number to any other points of the trigger 8.

[0082] In another embodiment of the invention, which is not shown, a marking may be provided on the first cylindrical section 34 of the switching shaft 18 that protrudes from the trigger blade 15 which, depending on the switching position, points to corresponding labels. The marking on the switching shaft would rotate around axis D like the hand of a clock during switching operations.

[0083] In another embodiment of the invention, which is not shown, no labelling is applied to the trigger 8. In this case, the meaning of the switching positions can be explained, for example, in a corresponding user manual.LIST OF REFERENCE SIGNS1 Rear housing pin

[0085] 2 Upper housing part

[0086] 3 AR-type weapon

[0087] 4 Front housing pin

[0088] 5 Lower housing part

[0089] 6 Front cross-bore in lower housing part 5

[0090] 7 Rear cross-bore in lower housing part 5

[0091] 8 Trigger

[0092] 9 Hammer

[0093] 10 Left bearing pin

[0094] 11 Right bearing pin

[0095] 12 Torx® drive

[0096] 13 Subassembly of the trigger shaft

[0097] 14 Trigger housing

[0098] 15 Trigger blade

[0099] 16 Disconnector

[0100] 17 Hammer spring

[0101] 18 Switching shaft

[0102] 19 Latch surface of the hammer 9

[0103] 20 Latch surface of the trigger blade 15

[0104] 21 Trigger spring

[0105] 22 Bottom surface of the switching shaft 18

[0106] 23 Bottom surface in the trigger housing 14

[0107] 24 Finger surface on the trigger blade 15

[0108] 25 Rear stop nose

[0109] 26 Rear stop surface

[0110] 27 Front stop nose

[0111] 28 Front stop surface

[0112] 29 Large cylindrical section of the opening in the trigger blade 15

[0113] 30 Step of the opening in the trigger blade 15

[0114] 31 Small cylindrical section of the opening in the trigger blade 15

[0115] 32 First ledge

[0116] 33 Second ledge

[0117] 34 First cylindrical section of the switching shaft 18

[0118] 35 Extension of the switching shaft 18

[0119] 36 Second cylindrical section of the switching shaft 18

[0120] 37 Bearing shoulder

[0121] 38 Label with a pictogram showing raised switching shaft 18

[0122] 39 Label with a pictogram showing lowered switching shaft 18

Examples

Embodiment Construction

[0046]The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description in combination with the drawings making apparent to those of skill in the art how the several forms of the present invention may be embodied in practice.

[0047]In the following text, elements that are identical in construction but installed multiple times in different places are distinguished from one another with the help of a letter index. For example, the subassembly of the trigger shaft is referred to with reference number 13 in the list of reference signs and in the ex...

Claims

1. A trigger with incrementally adjustable trigger weight for a weapon of the AR-type, wherein the trigger blade has at least one opening, wherein the at least one opening has a step and wherein the step has at least two ledges with different depths, and wherein a switching shaft which has a first cylindrical section, at least one extension and a second cylindrical section is guided rotatably and axially displaceably in the opening and wherein the switching shaft is pressed with its at least one bearing shoulder against the step or into one of the at least two ledges of different depths through a force of a trigger spring which is supported on a bottom surface in a trigger housing or on a bottom of a lower housing part of the weapon.

2. The trigger of claim 1, wherein the switching shaft has a drive for an operating tool on its first cylindrical section.

3. The trigger of claim 2, wherein a drive of the switching shaft is designed as a Torx® drive.

4. The trigger of claim 1, wherein an axis D of the opening is arranged at an angle α≥0° and <90° to a vertical V in the trigger blade.

5. The trigger of claim 1, wherein the trigger blade is located in its initial position with a hammer in a cocked state with its rear stop nose resting on a rear stop surface in the trigger housing.

6. The trigger of claim 1, wherein in a fully actuated state the trigger blade rests with its front stop nose against a front stop surface in the trigger housing.

7. The trigger of claim 6, wherein when the trigger blade rests with its front stop nose against the front stop surface of the trigger housing in the fully actuated state, the trigger spring has not yet reached its solid length.

8. The trigger of claim 1, wherein at least one label is applied to the trigger, by means of which a user can clearly assign a present switching position to a corresponding trigger weight.

9. The trigger of claim 8, wherein the at least one label is applied to the trigger housing.

Images