EP-4078071-B1 - TRIGGER UNIT FOR A FIREARM AND A FIREARM EQUIPPED THEREWITH

Inventors

• Werdnig, Andreas
• Markut, Karl

Dates

Publication Date

20260506

Application Date

20201013

Claims (8)

1. Trigger unit (20) for a firearm, which is housed in a trigger housing (23), comprising a trigger lever (26) rotatably mounted about a trigger axis (262), in which the trigger lever (26) has, formed integrally with it, a trigger bar (264) which, when viewed in a normal direction (93), lies below the trigger axis (262) and is moved when the trigger bar (264) is actuated against a barrel direction (91), and a fire-control/safety selector (60), characterized in that the fire-control/safety selector (60) has a locking lever (620) which is rotatably mounted about a locking lever axis (641) which is arranged in the trigger housing (23) and is biased in a circumferential direction by a locking lever spring (630), and that the locking lever axis (641), when viewed in the barrel direction (91), is arranged behind the trigger axis (262), and the locking lever (620) has two arms (621) which are designed to releasably fix the fire-control/safety selector (60) in a selectable position.
2. Trigger unit (20) according to claim 1, characterized in that the fire-control/safety selector (60) is designed as a rotary selector (610) which is rotatable mounted about an axis parallel to the normal direction (93) and includes a first rotary lever (611) and a second rotary lever (612), a. that a cylinder (6111) with an end section (6112) is formed on the first rotary lever (611). b. that the end section (6112) has a smaller diameter than the cylinder (6111) in the area outside the end section (6112) in the assembled state, c. that at least one detent (616), preferably in the form of a radial recess, is arranged on the end section (6112), d. that a hollow cylinder (6212) with a slot (6165) extending in the circumferential direction and a continuous notch (615) extending in the direction of a hollow cylinder axis (6213) of the hollow cylinder (6212) is formed on the second rotary lever (612), e. that the inner diameter of the hollow cylinder (6212) corresponds to the diameter of the end section (6112), f. that a rib (614) in the form of a radial elevation is formed on the end section (6112), g. that the continuous notch (615) and the end section (6112) are designed to be complementary in shape to the rib (614) and to the end section (6112), and h. that the end section (6112) can be inserted axially and displaceably into the hollow cylinder (6212); i. the first rotary lever (611) comprises: j. a radial groove comprising detents in phase with the detents (616) already located on the end section (6112), k. the locking lever: l. is provided with two arms, one reaching the end section (6112) and its detent (616), and being received in the slot (6165) of the second rotary lever (612), the other being received in said radial groove of the first rotary lever (611), reaching the detents (616) located in the bottom of said radial groove, both arms being fixed relative to each other, thereby preventing the two rotary lever (611, 612) from disengaging from each other.
3. Trigger unit (20) according to claim 2, characterized in that in the installed condition in a firearm with a locking lever (620) the two rotary levers (611, 612) of the rotary selector (610) are secured against moving axially by the engagement of a spike (622) of the locking lever (620) in the selector slot (6165), and that the rotary selector (610) is secured in this way in the trigger housing (23).
4. Trigger unit according to claim 1, characterized in that the fire-control/safety selector (60) is designed as a sliding selector (650) which is mounted displaceably along an axis parallel to the normal direction (93), and a. that the sliding selector (650) has at least one pair of grooves (652) merging into one another on the outer contour, which serve as catches for the locking lever (620) and b. that in the installed condition projections of the spring-loaded locking lever (620) protrude into the grooves (652), so that the position of the sliding selector (650) is secured in the trigger housing (23).
5. Trigger unit according to claim 4, characterized in that the sliding selector (650) has an outer contour with which it is displaceably guided in at least one opening of complementary shape in a trigger housing (23) or in an upper receiver (111) or lower receiver (112) of the firearm.
6. Trigger unit (20) according to one of the preceding claims, characterized in that the locking lever (620) comprises a spring-loaded plunger (670) oriented in the transverse direction (92) on one side, which in the installed condition engages in a trigger housing (23) or in an upper receiver (111) or lower receiver (112) of the firearm.
7. Trigger unit (20) according to claim 6, characterized in that the trigger housing (23) has the shape-complementary opening in which the sliding selector (650) is displaceably guided.
8. Firearm, characterized in that it has a trigger unit (20) according to one of the preceding claims.

Description

The invention relates to a trigger for a firearm according to the preamble of claim 1 with a sear with a sear axis, a trigger lever with a trigger axis, a disconnector with a joint and a hammer rotatable about a hammer axis having a hammer spring. The invention also relates to the accommodation of such a trigger in a receiver, whereby a drop-in trigger unit is created which is simply pushed into the weapon, preferably its lower receiver, if it has a lower receiver, whereby the drop-in trigger unit is fixed by the upper receiver. The embodiment of a fire-control/safety selector as a rotational lever or as a sliding lever is also an object of the invention. Another object of the invention is also a firearm that contains one or more of these components. The invention and its variants are not limited to use in rifles, carbines, etc., but can, in principle, also be used in certain pistols. The improvements achieved and the effects/advantages of these improvements are stated below. Since such trigger units can be used interchangeably as a module in existing weapons and the weapons themselves only provide the geometric and functional boundaries for their use, the invention primarily relates to a trigger unit and only secondarily to a weapon having such a trigger unit. A modem trigger unit should generally be easy to use, reliable, easy to maintain and, by means of a fire-control/safety selector, should be adjustable between a "safe" state and at least one "unlocked" or "fire" state. A large number of such trigger units have a construction which prevents the selector from being adjusted to the "safe" position when the hammer is in the behind or downward position. This is often due to the fact that the trigger lever, which includes a sear that interacts with the fire-control/safety selector (also often referred to as a safety lever), the trigger and the hammer (also referred to as a striking piece), is designed in one piece. Examples are US 10,330,413 B2, EP 2 950 033 B1, and US 7,600,338 B2, from which these relationships can be seen very clearly. An example for a trigger safety, where the selector may not be brought to the "safe" position when the hammer is in the behind or downward position, is disclosed in the US 6,223,460 B1, which mainly deals with the problem to provide a safety, which may be changed to be used by left-handers without great problems. A further example is the US 2009/0188145 A1 which is directed to a two-stage trigger apparatus and does not deal with the problem mentioned above. Reference is also made to US 2016/0363401 A1, which discloses a modular hammer-trigger system in which, as can be seen particularly well in Fig. 7, both a disconnector and a sear are rotatable mounted in recesses of the trigger and are biased by means of springs. The hammer and trigger can be rotated in a common module by means of needle bearings and are also biased by means of springs. The various springs, the requirement for the spring to fit in very small spaces, and the tight geometric dependencies required to fulfill the individual functions of the springs are problematic, even if one assumes that maintenance only takes place in an armory and/or with the use of special tools. Another common concern is the shooter's interest in having a trigger unit that requires a two-stage build-up of resistance until the shot is fired. These trigger resistances should be perceived and distinguishable by the shooter when the trigger is operated. Here, too, a large number of two-stage trigger units are known to have a first trigger pull resistance (e.g. "pre-trigger resistance") and a second trigger pull resistance (e.g. "main trigger resistance"). Overcoming the first and second trigger resistances is often referred to in English as the "first stage" and the "second stage." The previously cited US 7,600,338 B2, and US 2019/257606 A1, should be mentioned as representative of the many different design options for two-stage trigger units since very different components are responsible for their operation. The object of the present invention is therefore to provide a trigger unit according to claim 1, which enables the firearm to be secured with the fire-control/safety selector able to turn to the "safe" position when the hammer is in the behind or downward position. Another object of the invention is, with at least one embodiment, a two-stage or three-stage trigger unit with different trigger resistances are provided. In addition, a further object of the present invention is to provide a fire-control/safety selector that is easy to use and, if necessary, easy to replace. Furthermore, the object of the present invention is to keep the total number of components of a trigger assembly as low as possible and preferably to make their arrangement in the receiver of a firearm as positionally stable and as easy to replace as possible. Furthermore, in one variant, one object of the present invention is to provide a trigger unit that is easy