Patent Application
20120096753
The present invention relates to a trigger device for a firearm with a spring-loaded firing pin that engages with a catch in the cocked position, the catch being releasable transversely to the direction of the firing pin in order to fire a shot, and displaceable along the direction of the firing pin, for safety purposes, between the cocked position and a safety position relieving the tension of the firing pin spring.
Movable catches for cocking and uncocking the firing pin spring are used for temporarily securing an already loaded weapon, e.g., for transport or while hunting. For this purpose, designs are known (e.g. AT 409 548 B) in which the catch is situated together with its initiator on a carriage that is movable in the housing and cooperates with the trigger. This type of carriage structure requires a number of moving parts, which has the disadvantage of an increased susceptibility to malfunctions and an increased space requirement. There are also known designs on the market in which the catch moves relative to its initiator when displaced, which impairs the precision of the shot trigger point and consequently also bears the risk of an unintended shot being fired if there is too little engagement overlap.
The invention has the objective of overcoming the disadvantages of the prior art and creating a trigger device for a firearm that is simple and not susceptible to malfunction on the one hand and, on the other, allows an exact definition of when the shot is triggered.
This objective is achieved with a trigger device of the type mentioned above that is distinguished according to the invention in that the catch slides during displacement on an intermediate member that is movable in the direction of release of the catch, and engages with a click-stop edge of a trigger, which edge can be disengaged to fire a shot.
The triggering engagement, which is decisive for the release of the catch, is shifted in this manner from the catch to an intermediate member guided in the housing. This allows an exactly definable engagement overlap, independent of the displacement of the catch, for adjusting the trigger-press point.
The trigger is preferably seated in the housing of the firearm and bears on a shoulder the click-stop edge for the intermediate member, whereby the triggering point for firing a shot can be defined especially exactly.
It is particularly favorable if the intermediate member is a catch rod guided linearly in the housing of the firearm, which yields a simple structure.
According to another preferred embodiment of the invention, the catch slides on the intermediate member via an intercalated roller. This reduces the friction of the catch in its movement between the cocked position and the safety position, so that the cocked position can be reached with less exertion of force than with known solutions.
The roller is preferably located at the upper end of the catch rod, whereby the catch is simplified and reduced in weight. It is particularly favorable if the roller is seated with a ball bearing, in order to reduce friction even further.
According to another advantageous embodiment of the invention, it is provided that the extent of the engagement overlap of the intermediate member with the click-stop edge of the trigger is adjustable by means of an adjustment screw. Thereby the trigger point of the weapon can be adjusted, independently of the positions of the catch.
It is particularly favorable if the catch can be moved between the cocked position and the safety position by a cocking slide that acts on the actuation element via a linkage, as is known from prior art. Alternatively, the catch could also be actuated by a cocking wheel via a suitable linkage.
The trigger device according to the invention is suitable for any type of firearm with a firing pin and a catch that can be moved for safety purposes. Preferably, however, the firearm is a semiautomatic weapon with a rotary piston action and in particular, the firing pin engages with the catch by means of an attached firing pin tab; for these types of weapon, the trigger device of the invention leads to particularly low overall height and easy integration.
The invention will be explained in detail below with reference to an embodiment example illustrated in the attached drawings. In the drawings:
The firing pin 1 is subjected to a force to the left in the drawing by a firing pin spring 5 (indicated schematically) and is engaged with a firing pin tab 6 at point 7 on a catch 8. The catch 8 is seated movably, in both the longitudinal and the transverse directions of the firing pin, by a bearing journal 9 in elongated holes of the housing 4. Thus the catch 8 can first be released from the firing pin 1 by means of the trigger device 2 to fire a shot, so that the pin moves to the left by the force of the firing pin spring 5 to collide with the cartridge (see position after firing in
an unsecured or cocked position (
an uncocked safety (
In this respect, the catch 8 is a part of the trigger device 2 as well as the cocking and uncocking mechanism 3.
To absorb the above-mentioned displacement motion of the catch 8, the trigger mechanism 2 comprises an intermediate element in the form of a catch rod 10 that is linearly guided in the housing 4 approximately vertically and supports a ball bearing-seated roller 11 at its upper end, on which the catch 8 can slide back and forth. The catch rod 10 in turn is engaged at a shoulder 12 on a click-stop edge 13 formed on a shoulder 14 of the trigger 15. The trigger 15 is pivotably seated at 16 on the housing 4 and when actuated moves the click-stop edge 13 away from the catch rod 10, so that the latter is moved downward (
The trigger 15 with its click-stop edge 13 can be integrally formed or, as shown, as two parts adjustable relative to one another, such as a first part comprising a trigger blade 18 and a second part comprising the shoulder 14 with the click-stop edge 13. The trigger 15 can further be equipped with a drop guard 19 and a bolt catch 20 for triggering a rotary piston action, as known to those in the art.
The cocking and uncocking mechanism 3 comprises an actuator element 21 in the form of a cocking slide 21 seated slidably on the outside of the housing 4 with a thumb-press surface 22, which acts via a linkage 23 on the catch 8 in order to move it back and forth in the longitudinal direction of the firing pin between its two positions (
The motion link 24 comprises a pivoting crank 25 that can be pivoted by the cocking slide 21 via a connecting rod 26 and bears a control cam 27 on its outer periphery. A sensing linkage 28 with a ball bearing-seated cam follower 29 rolls over the control cam 27 and translates the shape of the control cam 27 into a movement of the catch 8 via a housing-seated two-armed lever 30 that engages with a pin 31 of the catch 8.
The pivoting crank 25 is also equipped with an auxiliary linkage guide 32 in the form of a groove guide that is located behind the control cam 27 and with which the sensing linkage 28 engages by means of a retaining pin 33 projecting past the cam follower 29. Thereby a forced contact of the cam follower 29 on the control cam 27 is assured in every operating state.
When the cocking slide 21 in
All rotary or pivot bearings in the mechanism can preferably be implemented by means of rolling contact bearings in order to reduce friction.
The invention is accordingly not limited to the illustrated embodiments, but instead comprises all variants and modifications that fall within the scope of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| A1020/2009 | Jun 2009 | AT | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/AT2010/000150 | 5/6/2010 | WO | 00 | 12/16/2011 |
