Trigger device for a firearm and firearm with such a trigger device
Patent Information
- Application Number
- EP2024703259
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-03-14
- Filing Date
- 2024-01-25
- Publication Date
- 2026-01-21
AI Technical Summary
Existing trigger devices in firearms, particularly breech-loader types, face challenges in balancing drop resistance with shooting precision and accuracy, often requiring increased spring force which can lead to reduced precision and unwanted or premature hits due to the mechanical complexity and mass inertia of the trigger mechanism.
A trigger device with a rotatably connected trigger blade and trigger rod, utilizing a link with first and second control cams to create a gear ratio that amplifies the actuation force while reducing the spring force required, allowing for a smoother and more precise trigger operation by decoupling the trigger blade from the mass inertia and enabling a clear trigger point feel.
The solution allows for easier and more precise firearm operation by reducing the effort needed to trigger the firearm, enhancing shooting accuracy and safety, while maintaining comparable or improved fall safety through the adjustable gear ratio and control cam design.
Smart Images
Figure AT2024060019_19092024_PF_FP_ABST
Abstract
Description
[0001] Trigger device for a firearm and firearm with such a trigger device
[0002] The present invention relates to a trigger device for a firearm and a firearm, in particular a breech-loading firearm, having such a trigger device. The trigger device comprises a trigger bar for triggering a firing device mounted in the firearm and a trigger blade for actuating the trigger bar. The trigger bar and the trigger blade are mounted in the firearm for linear displacement.
[0003] Trigger devices in which the firing mechanism is triggered via a trigger rod mounted in the firearm so that it can be moved linearly are frequently, but not exclusively, found in muzzle-loading firearms (also called "bullpup" firearms), e.g. the Steyr AUG rifle. In order to ensure that the firearm is reliably dropped in the longitudinal direction of the trigger rod, despite the inertia of such a trigger device with a trigger rod, an increased spring force is generally provided for the firing mechanism in addition to the mechanical safety. However, this makes it more difficult to fire the weapon and makes it harder for the shooter to feel the point at which the firing mechanism is triggered. This reduces the precision when firing and subsequently the accuracy of the shot and / or even leads to unintentional or at least premature firing.
[0004] To overcome at least some of these disadvantages, a trigger device is known from patent AT 523 522 B1, in which a trigger blade is mounted on a trigger slide so that it can rotate about an axis. The trigger bar is anchored to the trigger slide, meaning that the trigger slide and the trigger bar are mounted together in the firearm for linear movement. The trigger blade is a lever with a longer blade end and a shorter extension protruding on the opposite side of the axis, which is supported on the housing of the firearm. The actuation of the trigger blade is therefore a two-step process: Firstly, the trigger blade rotates around the axis when actuated at the end of the blade, so that the extension, due to its support on the firearm, linearly shifts the axis and with it the trigger slide until the end of the blade comes to rest on the trigger slide.As a result, when the trigger is further pulled, the trigger blade is no longer rotated but the trigger slide and the end of the blade resting on it are moved linearly.
[0005] In this way, a leverage effect is achieved in the first step, which increases the force exerted by the shooter on the trigger blade, whereas in the second step the shooter still has to apply the full trigger force. The large trigger slide also increases the overall mass of the linearly movable parts and thus impairs drop safety and makes firing more difficult, even if the release point of the striking device is set so that it lies between the first and second steps and can be clearly felt. It is also somewhat annoying for the shooter that the trigger blade first rotates around its axis and then moves linearly with the trigger slide.
[0006] The invention aims to create a trigger device with a trigger bar which allows a firearm to be fired more easily and precisely.
[0007] According to a first aspect, this aim is achieved with a trigger device of the type mentioned at the outset, in which, according to the invention, the trigger blade is coupled to the trigger rod at least via a link which can be rotated about an axis of rotation in the firearm and has a first control cam, on which the trigger blade acts, and a second control cam, on which the trigger rod acts, in order to convert an actuating path of the trigger blade for actuating the trigger rod into a trigger path of the trigger rod for triggering the striking device.
[0008] The gate forms a gear between the trigger blade and the sear, with the control cams allowing enormous design freedom for the gear ratio, i.e. the relationship between actuation travel and release travel or between release force and actuation force. In particular, this enables a ratio that varies over the actuation travel of the trigger blade through the design of the courses and the arrangement of the control cams on the gate. Furthermore, since the gate can be rotatably mounted directly in the firearm, it does not contribute to the mass inertia in the longitudinal direction of the release bar and at the same time at least partially decouples the trigger blade, so that with comparable drop safety the spring force of the striking device can be selected to be lower or, conversely, with the same spring force the drop safety is higher.By appropriately selecting the control curves and adapting them to the firing mechanism, the firing point of the firing mechanism can be precisely felt. Finally, the movement of the trigger blade is consistently linear, with no disruptive effect on the shooter caused by alternating movement.
[0009] The two control cams can have any desired shape, in particular a different one from the other, and can be arranged on the guide rail at the same or different distances from the rotational axis. Preferably, the trigger blade, the first and second control cams, and the trigger rod are designed such that the actuation travel is longer than the release travel. The guide rail thus forms a gear with a force-enhancing effect over at least part of the actuation travel.
[0010] In an advantageous embodiment, a first ratio between a first part of the actuating travel and a first part of the trigger travel is greater than a second ratio between a second part of the actuating travel and a second part of the trigger travel. This results in a lower force required by the shooter in the first part and a greater force required in the second part to linearly displace the trigger bar. It is understood that the actual force required to fire the firearm depends on the counterforce of the striking device, which usually varies over the trigger travel.
[0011] If in this embodiment the said first and second parts are adjacent to one another, in a first advantageous variant at least one of the control cams has a knee which is passed at the boundary between the first and second parts. In a second variant which is alternative or additional to this, the trigger bar has a driver which the trigger blade comes into contact with when passing the boundary from the first to the second part of the actuation travel, in order to actuate the trigger bar in the first part of the actuation travel via the guide and in the second part alternatively or additionally directly via the driver. In both variants the two parts of the actuation travel are clearly distinguishable from one another for the shooter. If the firearm is suitably adjusted the trigger point of the striking device lies at this boundary and is therefore particularly clearly noticeable.This adjustment can be advantageously achieved if the follower or the trigger blade has an adjusting screw, whereby the trigger blade comes into contact with the follower via the adjusting screw when it passes the boundary between the first and the second part of the actuating travel.
[0012] The trigger blade can be mounted directly in the firearm for linear movement. It is advantageous if the trigger blade is mounted on the trigger bar for linear movement, so that the trigger blade is not mounted directly in the firearm, but rather indirectly via the trigger bar for linear movement. The trigger blade and the trigger bar—and, if necessary, the guide—can thus be pre-assembled as a kit.
[0013] According to a second aspect, the invention provides a firearm, in particular a firearm of the breech-loading type, with a striking device for firing the firearm and a trigger device of the aforementioned type, which is mounted in the firearm.
[0014] With regard to the advantages and further embodiments of the firearm, reference is made to the above explanations of the trigger device according to the invention.
[0015] In an advantageous embodiment of the firearm, the trigger blade, the first and second control cams, the trigger bar, and the firing mechanism are designed such that the firing mechanism is triggered upon crossing the boundary between the first and second parts. The trigger point of the firing mechanism is thus particularly clearly perceptible, and the firearm can be fired precisely.
[0016] It is advantageous if the firearm is an automatic firearm, with the trigger blade, the first and second control cams, the trigger bar, and the firing mechanism being designed to initiate continuous fire when the trigger blade is moved to an end position of the second part of the actuation travel, facing away from the first part of the actuation travel. This allows the shooter to sensitively and precisely control both functions of the firearm—single-shot firing and continuous fire—with a single linear trigger movement.
[0017] The invention is explained in more detail below using an example illustrated in the accompanying drawings. The drawings show:
[0018] Fig. 1 shows a firearm according to the invention in a side view;
[0019] Fig. 2 shows a trigger device according to the invention of the firearm of Fig. 1 in a perspective view from the side; and Figs. 3a to 3c show the trigger device of Fig. 2 in a rest position (Fig. 3a), in an intermediate position (Fig. 3b) and in a final position (Fig. 3c), respectively, each in a vertical longitudinal section.
[0020] Fig. 1 shows a firearm 1, in this example a firearm 1 of the breech-loading type (also: "bullpup"). The firearm 1 has a barrel 2 and a stock 3, in which a magazine 4 is inserted, which can be detached from the stock 3 by means of a release 5. Furthermore, a grip 6 is attached to the stock 3, from which a trigger blade 7 protrudes, which is linearly movable approximately parallel to the barrel 2. With the help of the trigger blade 7, a striking device mounted in the firearm 1 (not visible here) is triggered in order to fire the firearm 1.
[0021] Fig. 2 shows an exemplary embodiment of a trigger device 8 of the firearm 1. The trigger device 8 comprises a trigger rod 9, which can be mounted for linear displacement in the firearm 1, for example in its stock 3 or an optional housing (not shown) or the like, or in the case of Fig. 1 is already mounted in the firearm 1. The trigger rod 9 can be coupled to the striking device for triggering the latter, or in the case of Fig. 1 is coupled thereto. Furthermore, the trigger device 8 comprises the trigger blade 7, via which the trigger rod 9 is actuated and which can be mounted or mounted for linear displacement either indirectly, for example if it is mounted for linear displacement on the trigger rod 9, or alternatively directly in the firearm 1. Furthermore, the trigger device 8 comprises a link 10 which is rotatably mounted or supported about a rotation axis D in the firearm 1, for example via a bearing pin 11 and / or a bearing plate 12 or the like.
[0022] Storage "in" the firearm 1 does not require the trigger device 8 to be completely accommodated inside the firearm 1. Rather, the trigger device can be at least partially accessible on the outside of the firearm 1, e.g., a part of the trigger blade 7, etc., or can be mounted on it.
[0023] 3a to 3c, the gate 10 has a first control cam 13, on which the trigger blade 7 engages, and a second control cam 14, on which the trigger bar 9 engages. The trigger blade 7 is thus coupled to the trigger bar 9 via the two control cams 13, 14 of the gate 10. In the example shown, the two control cams 13, 14 are each arranged on a flank of a separate opening 15, 16, on which tappets 17, 18 of the trigger blade 7 and the trigger bar 9 engage, respectively. It is understood that alternatively, the two control cams 13, 14 can be two different flanks of a single opening or of a separate or common groove. The tappets 17, 18 can be pins, as in the example shown, or alternatively, for example, sliding blocks, rollers, etc. In this example, the plunger 18 of the trigger bar 9 is also arranged on a driver 19 of the trigger bar 9. Alternatively, it can protrude directly from the trigger bar 9 or, for example,be formed by a corresponding bend or the like of the trigger rod 9 itself.
[0024] With the aid of the control cams 13, 14, at least part of an actuating path B, which the trigger blade 7 travels when the trigger bar 9 is actuated between a rest position R (Fig. 3a), an intermediate position Z (Fig. 3b) and an end position E (Fig. 3c) relative to the firearm 1 or the axis of rotation D that can be mounted therein, is converted into a triggering path A, which the trigger bar 9 travels relative to the axis of rotation D in order to trigger the striking device. For this purpose, the trigger blade 7, the first and second control cams 13, 14 and the trigger bar 9 are optionally designed such that the actuating path B is longer than the trigger path A. In this way, the trigger device 8 forms a gear with the effect that an actuating force applied by a shooter to the trigger blade 7 is amplified at least in sections over the actuating path B, so that a greater trigger force of the trigger bar 9 is achieved for triggering the striking device.
[0025] This gear effect is achieved by the course of the first and second control cams 13, 14, i.e. their alignment(s) and curvature(s) and / or by their respective position on the link 10, e.g. in that the trigger tongue 7 engages with its tappet 17 at a greater distance ai from the axis of rotation D of the link 10 on the first control cam 13 than the trigger rod 9 engaging with its tappet 18 at a distance a2 on the second control cam 14 and / or in that a tangential angle (not shown in Figs. 3a to 3c) of the first control cam 13 at the point of engagement of the tappet 17 of the trigger tongue 7 with respect to the radial direction of the link 10 is different from a tangential angle of the second control cam 14 at the point of engagement of the tappet 18 of the trigger rod 9 with respect to the radial direction. The two distances ai, a2 vary over the actuation or release path B, A; the curvature(s) of the first and second distances also vary.second control curve 13, 14 optionally have different radii of curvature and varying tangential angles and / or even different directions of curvature, ie convex or concave.
[0026] If the trigger blade 7 is not operated by the shooter, the trigger blade 7, the trigger rod 9 and the link 10 return to the rest position R shown in Fig. 3a as a result of a spring force, e.g. of the striking device. In the following, various variants of the trigger device 8 are explained in more detail with reference to the rest position R, the intermediate position Z shown in Fig. 3b, which is reached as a result of the shooter applying force to the trigger blade 7, and the end position E shown in Fig. 3c, which is reached as a result of further force being applied to the trigger blade 7.
[0027] In an optional embodiment, the actuation path B is divided into (at least) two parts Bi, B2, ... and therefore also the triggering path A into (at least) two parts A lzA2, ..., which is shown in Fig. 3a to 3c by dashed position arrows across the figures and labeled in Fig. 3a. These differ in that a first ratio V lz which is the quotient between the first part B ± of the actuation path B and the first part Ai of the release path A (Vi = Bi / Ai), is greater than a second ratio V2, which results from a quotient between the second part B2 of the actuation path B and the second part A2 of the release path A (V2 = B2 / A2 with Vi > V2). A force-enhancing gear effect of the link 10 or its control curves 13, 14, for example, is then at least on average stronger in the first part Bi of the actuation path B than in its second part B2 or even only in the first part Bi. Thus, in the example of Fig. 3a to 3c, the first ratio Vi is significantly greater than 1 (V ±>> 1) , since the first part Bi of the actuating travel B is considerably larger than the first part Ai of the triggering travel A. On the other hand, the second ratio V2 is approximately equal to 1 (V2« 1) , since the two second parts B2 and A2 are approximately equal.
[0028] In an optional variant, the first and second parts Bi, B2 and Ai, A2 respectively adjoin each other. In the example shown, in this variant, at least one of the control curves 13, 14 (here: the second control curve 14) has a knee 20. The first parts Bi, A ± lie between the rest position R (Fig. 3a) and the intermediate position Z (Fig. 3b), the second parts B2, A2 between the intermediate position Z and the end position E (Fig. 3c), and the knee 20 at the boundary between the two parts Bi, B2 and Ai, A2, respectively. Thus, when the trigger blade 7 is actuated, the knee 20 at the boundary between the first and second parts Bi, B2 and Ai, A2, respectively, is passed.
[0029] In an alternative or complementary variant, the trigger bar 9 has the optional follower 19, and the trigger blade 7 comes into contact with one (or more) contact surfaces 19' of this follower 19 when passing the boundary between the first and second parts Bi, B2 of the actuating path B, i.e., in the intermediate position Z (Fig. 3b). In comparison, in the rest position R, there is a distance 5 between the trigger blade 7 and the contact surface(s) 19' (Fig. 3a).
[0030] In this variant, the trigger blade 7 actuates the trigger bar 9 in the first part B1 of the actuation path B until it reaches the intermediate position Z via the guide 10. By coming into contact with the contact surface 19' in the intermediate position Z, the trigger blade 7 actuates the trigger bar 9 in the second part B2 directly via the contact surface 19' of the follower 19 (and optionally additionally via the control cams 13, 14 of the guide 10). Thus, the coupling between the trigger blade 7 and the trigger bar 9 in the first part B1 of the actuation path B is achieved solely via the guide 10, and in the second part B2 solely or additionally via the follower 19.
[0031] Optionally, the trigger blade 7, the first and second control cams 13, 14, the trigger bar 9 and the striking device are designed such that the striking device is triggered when the aforementioned limit is passed from the first to the second parts Bi, B2 or Ai, A2 of the actuation or triggering path B, A. This can be achieved in particular by setting or adjusting the coupling between the trigger bar 9 and the striking device or between the driver 19 and the trigger bar 9 accordingly. At least part of this setting or adjustment can be carried out via an optional adjusting screw 21, e.g. a worm screw. In the example shown, the trigger blade 7 comprises the adjusting screw 21, which can be adjusted from the outside, for example, through an opening 22 in the trigger blade 7, and when the aforementioned limit is passed, it comes into contact - indirectly - with the driver 19 via its adjusting screw 21.It is understood that, conversely, the driver 19 can encompass the adjusting screw 21, so that the trigger blade 7, when passing the said limit, comes into contact with the driver 19 - indirectly - via the adjusting screw 21 of the latter.
[0032] The firearm 1 can be of various types, e.g. a handgun, a small arm or even a cannon. In particular, the firearm 1 can be an automatic firearm 1 in which the trigger blade 7, the first and second control cams 13, 14, the trigger bar 9 together with its optional driver 19 and the striking device are designed to fire a single shot when the trigger blade 7 is moved from the rest position R into the intermediate position Z and passes the said limit, and to fire continuous fire as long as the trigger blade 7 is moved into the end position E, which in the example shown is located at the end of the second part B2 of the actuating travel B facing away from the first part Bi.
[0033] The invention is not limited to the embodiments shown, but includes all variants, modifications and combinations thereof that fall within the scope of the appended claims.
Claims
Patent claims:
1. Trigger device for a firearm (1), in particular for a firearm (1) of the breech-loading type, comprising a trigger rod (9) for triggering a striking device mounted in the firearm (1) and a trigger blade (7) for actuating the trigger rod (9), wherein the trigger rod (9) and the trigger blade (7) are mounted in the firearm (1) in a linearly displaceable manner, characterized in that the trigger blade (7) is coupled to the trigger rod (9) at least via a link (10) rotatably mounted in the firearm (1) about a rotation axis (D) with a first control cam (13) on which the trigger blade (7) engages, and a second control cam (14) on which the trigger rod (9) engages, in order to define an actuating path (B) of the trigger blade (7) for Actuation of the trigger bar (9) into a release path (A) of the trigger bar (9) for triggering the striking device.
2. Trigger device according to claim 1, characterized in that the trigger tongue (7), the first and second control cams (13, 14) and the trigger rod (9) are designed such that the actuating travel (B) is longer than the trigger travel (A).
3. Trigger device according to claim 1 or 2, characterized in that a first ratio between a first part (Bi) of the actuating path (B) and a first part (A ± ) of the triggering travel (A) is greater than a second ratio between a second part (B2) of the actuating travel (B) and a second part (Ai) of the triggering travel (A).
4. Extraction device according to claim 3, characterized in that said first and second parts (Bi, B2; Ai, A2) are each adjacent to one another, at least one of the control cams (13, 14) having a knee (20) which is passed at the boundary between the first and second parts (Bi, B2; Ai, A2).
5. Trigger device according to claim 3, characterized in that the said first and second parts (Bi, B2; Ai, A2) are each adjacent to one another, the trigger rod (9) having a driver (19) against which the trigger blade (7) comes to rest when passing the boundary between the first and the second part (Bi, B2) of the actuating path (B).
6. Trigger device according to claim 5, characterized in that the driver (19) or the trigger blade (7) has an adjusting screw (21), wherein the trigger blade (7) comes to bear on the driver (19) via the adjusting screw (21) when passing the boundary between the first and the second part (Bi, B2) of the actuating path (B).
7. Trigger device according to one of claims 1 to 6, characterized in that the trigger blade (7) is mounted on the trigger rod (9) in a linearly displaceable manner.
8. Firearm, in particular a firearm (1) of the breech-loading type, with a striking device for firing the firearm (1), characterized by a trigger device (8) according to one of claims 1 to 6, which is mounted in the firearm (1).
9. Firearm according to claim 8 in conjunction with a trigger device (8) according to one of claims 4 to 6, characterized in that the trigger blade (7), the first and second control cams (13, 14), the trigger rod (9) and the striking device are designed such that the striking device is triggered when the boundary between the said first and the said second parts (Bi, B2; Ai, A2) is passed.
10. Firearm according to claim 9, characterized in that the firearm (1) is an automatic firearm (1), wherein the trigger blade (7), the first and second control cams (13, 14), the trigger rod (9) and the striking device are designed to trigger continuous fire when the trigger blade (7) is brought into an end position (E) of the second part (B2) of the actuating path (B) facing away from the first part (Bi).