US20100229447A1

US20100229447A1 - Trigger mechanism for hand firearms

Info

Publication number: US20100229447A1
Application number: US12/643,232
Authority: US
Inventors: Thomas Metzger
Original assignee: JP Sauer and Sohn Machinenbau GmbH
Current assignee: JP Sauer and Sohn Machinenbau GmbH
Priority date: 2009-03-12
Filing date: 2009-12-21
Publication date: 2010-09-16
Also published as: ATE514913T1; EP2228616A1; EP2228616B1

Abstract

The invention concerns a trigger mechanism for hand firearms, in particular pistols, with a striking lever (2) for the actuation of a firing pin (6), a pre-tensioning spring (13) associated with the striking lever (2), a trigger spring (14), associated with the striking lever (2), a striking lever (5) for control of the pre-tensioning spring (13), and a trigger rod (8) which is connected with a trigger (9) at its front end and cooperates with the striking lever (2) and the control lever (5) at its rear end. A particularly compact design is thus attainable in that the pre-tensioning spring (13) and the trigger spring (14) are placed inside the striking lever (2).

Description

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. §119 to European Patent Application No. 09 154 953.5 filed Mar. 12 , 2009, the entire contents of which are incorporated herein by reference.

FIELD OF THE INVENTION

The invention relates to a trigger mechanism for hand firearms, in particular, pistols.

BACKGROUND OF THE INVENTION

Such a trigger mechanism is known from EP 1 878 992 A1. There, the necessary firing energy is made available by two striker springs, which are separate from one another and can be individually coordinated with one another. One of the two striker springs is used as a pre-tensioning spring for the storage of a pre-tensioning energy, whereas the second striker spring, which acts as the trigger spring, is cocked by means of the trigger, and determines the trigger force or the trigger resistance. The pre-tension of the pre-tensioning spring can, for example, be effected by the manual actuation of the striking lever or by the breech, which automatically returns with the firing of a shot as a result of the recoil. The trigger spring is cocked via the trigger by the shooter and produces the actual triggering force. The two striker springs together produce the total energy required to fire a cartridge, wherein the trigger resistance is designed to be variable and can be simply adapted to the various needs of the shooter. Within this known trigger mechanism, the two striker springs are placed on separate striker spring rods below the striker element within the pistol stock. A corresponding installation space must be available for this.

SUMMARY OF THE INVENTION

The goal of the invention is to create a trigger mechanism of the type mentioned above, which also makes possible, in a compact and space-saving type of construction, a pre-tensioning function with a reduced triggering force.
This goal is attained by means of a trigger mechanism with the features as set forth in the claims. Appropriate developments and advantageous refinements of the inventions are indicated in the dependent claims.
With the trigger mechanism in accordance with the invention, the pre-tensioning spring and the trigger spring are placed inside the striking lever. In this way, a trigger pre-tensioning system is created that is made in a compact manner, and even with a small trigger actuation force guarantees a sufficient firing energy of the overall system. The control of the pre-tensioning spring takes place by means of a control lever, which is actuated via the trigger rod and acts together with the pre-tensioning spring for the pre-tension or the release of the pre-tension force.
In a particularly compact and space-saving design, the trigger spring can be located within the pre-tensioning spring and coaxial to it, in the striking lever.
In another advantageous embodiment, the pre-tensioning springs are supported on a pre-tensioning spring guide located in the striking lever, and the trigger spring on a trigger spring guide which is also located in the striking lever. The pre-tensioning spring is advantageously supported on the pre-tensioning spring guide via a spacer sleeve. By the selection of appropriately dimensioned spacer sleeves and pre-tensioning springs, it is therefore possible to change the trigger forces and the trigger characteristics in a simple manner. The changes can be carried out simply and can be accomplished without great expense.
The pre-tensioning spring guide is guided in such a manner that it can be displaced and rotated in the striking lever and has a notch cam for engagement in a latching recess on a latching slot in the striking lever. For the actuation of the pre-tensioning spring guide, the control lever in another constructively appropriate embodiment has a slot for the engagement of the latching cam. The control lever is advantageously used not only for controlling the pre-tensioning spring, but also can control the release or blocking of the firing pin. In this regard, the control lever has a control surface for engagement with a firing pin safety for the release or blocking of the firing pin.

BRIEF DESCRIPTION OF THE DRAWINGS

Other distinctive features and advantages of the invention can be deduced from the following description of a preferred embodiment example with reference to the drawing. The figures show the following:

FIG. 1, a trigger mechanism of a pistol in accordance with the invention, in a perspective view;

FIG. 2, the trigger mechanism shown in FIG. 1, with a pre-tensioning spring which is untensioned;

FIG. 3, the trigger mechanism shown in FIG. 1, during the process of tensioning the pre-tensioning spring; and

FIG. 4, the trigger mechanism shown in FIG. 1, with the pre-tensioned pre-tensioning spring.

DETAILED DESCRIPTION OF THE INVENTION

The trigger mechanism of a pistol, shown in perspective in FIG. 1, comprises a striking lever 2, which is supported on a striking lever shaft 1 so that it can rotate, an interrupter lever 3, which is supported on the striking lever shaft 1 so that it can rotate, a control lever 5, which is supported on a striking lever pin 4 so that it can rotate, a firing pin 6, a firing pin safety 7, which cooperates with the control lever 5 for the release or blocking of the firing pin 6, and a trigger rod 8, which is articulated to a trigger 9 at its front end and cooperates with the striking lever 2 and the control lever 5 at its rear end. The trigger rod 8 is biased rearward by means of a trigger rod spring 10. A stop 11 is also associated with the striking lever 2. The striking lever shaft 1, the striking lever pin 4, the stop 11, and an abutment 12 for the trigger rod spring 8 [sic; 10] are located in a not-shown insertion of a pistol stock.
As can be seen in FIG. 1, a striking spring packet, with a radially outer pre-tensioning spring 13 and an inner trigger spring 14 coaxial to it, is placed in the striking lever 2. In this respect, the striking lever 2 has a blind hole-type recess 15, open downwards, against the upper closed end 16 of which the upper ends of the pre-tensioning spring 13 and trigger spring 14 are supported. The lower end of the radially inner trigger spring 14 is supported on a guided, disk-shaped trigger spring guide 17 that can be displaced in the recess 15 within the striking lever 2. The disk-shaped trigger spring guide 17 is, in turn, seated on the striking lever pin 4, which is displaced laterally with respect to the striking lever shaft 1.
The lower end of the radially outer pre-tensioning spring 13 is supported, via a spacer sleeve 18, on an inner annular flange 19 of a sleeve-shaped pre-tensioning spring guide 20, which can be displacably and rotatably guided in the recess 14 of the striker element 2. The sleeve-shaped pre-tensioning spring guide 20 has a detent cam 21 on its outside. This latching cam 21 projects through a lateral slot 22 of the striking lever 2 and engages in a curved slot 23 of the control lever at the untensioned starting position shown in FIG. 1. A latching recess 24 for the latching cam 21 is provided in the striking lever 2 at the upper end of the latching slot 22. In the starting position of FIG. 1, the lower end of the sleeve-shaped pre-tensioning spring guide 20 is on the disk-shaped trigger spring guide 17.
The mode of operation of the previously described trigger mechanism will be explained below with reference to FIGS. 1 and 4, while in the depictions 2-4 the upper part of the interrupter lever 3, and in FIG. 3 the rear part of the trigger lever 8, are cut away to enable better explanation.
FIG. 1 shows the trigger mechanism in a completely untensioned starting position. In this position, the striking lever 2 is vertical, wherein the radially outer pre-tensioning spring 13 and the inner trigger spring 14 coaxial to it are relieved of all tension. By means of the trigger rod spring 10, the trigger rod 8 is pressed backwards and the trigger 9 forwards in the non-actuated starting position. Via a lower projection 25, moreover, the control lever 5 is pressed into a starting position, pivoted forwards, with the aid of the trigger rod 8 pulled backwards, by the trigger rod spring 10. If the trigger 9 is actuated in this position, the striking lever 2 is pivoted rearward by the trigger rod 8, and the pre-tensioning spring 13 and the trigger spring 14 coaxial to it are put under tension by the striking lever pin 4 on which the trigger spring 14 is supported via the trigger spring guide 17, and the pre-tensioning spring 13, via the spacer sleeve 18 and pre-tensioning spring guide 20. The tensioning process takes place by means of the arrangement of the striking lever pin 4, which is offset relative to the striking lever shaft 1, which when the striking lever is pivoted provides for a displacement of the trigger spring guide 17 and of the pre-tensioning spring guide 20, and thus for the process of tensioning the pre-tensioning spring 13 and the trigger spring 14.
In the course of the tensioning process, moreover, the control lever 5 is rotated backwards by means of trigger rod 8, from its front starting position shown in FIG. 1, wherein according to FIG. 2 the striker pin safety 7, constructed as a catch rod or sliding catch, is lifted from a firing pin notch 27 via an upper control surface 26 of control lever 5, and releases the firing pin 6 for displacement. When the striking lever 2 arrives at the rear triggering position, shown in FIG. 2, the trigger rod 8 is disengaged from the striking lever 2 and releases it for the forward movement to actuate the firing pin 6. With this tensioning and triggering process, the latching cam 21 moves freely into the curved slot 23 of the control lever 7. In the triggering position shown in FIG. 2, the latching cam 21 has not yet arrived at the latching recess 24, so that here a locking into place cannot yet occur.
On the other hand, if the striking lever 2 is pivoted from the starting position shown in FIG. 1 to a back end position shown in FIG. 3 manually or by the breech returning with the recoil, the interrupter lever 3 is likewise rotated backwards (in FIG. 1, counterclockwise), by means of the not-shown breech, and steers the trigger rod 8 downwards with a lower control surface 28, so that the control lever 5 is disengaged from the trigger rod 8, and with the spring actuation it again moves into its front starting position shown in FIGS. 1 and 3. In this way, it is possible for the firing pin safety 7, constructed as a catch rod or a sliding damper, to again move into its lower end position and to secure the firing pin 6 against displacement by engagement in the firing pin notch 27.
With the movement of the striking lever 2 into the back end position shown in FIG. 3, the pre-tensioning spring 13 and the trigger spring 14 are moreover placed under tension by the displacement of the corresponding pre-tensioning spring guide 20 or the trigger spring guide 17 by means of the striking lever pin 4. By means of stop 11, the latching cam 21 is pivoted into the latching recess 24 at the upper end of the latching slot 22 with the rotation of the sleeve-shaped pre-tensioning spring guide 20 around its longitudinal axis, and arrives at an engagement with the latching recess 24. If the breech again arrives at its front starting position after the repeating action, the striking lever 2 also returns to its front starting position, wherein the radially inner trigger spring 14 is again relieved of tension and also brings the trigger spring guide 17 into its starting position. The pre-tensioning spring 13, on the other hand, is held in a pre-tensioned position by the engagement of the latching cam 21 in the latching recess 24.
If the trigger 9 is actuated from this pre-tensioned position, the striking lever 2 is also pivoted backwards via the trigger rod 8 to the release position shown in FIG. 4. The radially inner trigger spring 14 is thereby under tension via the trigger spring guide 17 which is supported on the striking lever pin 4. The pre-tensioning spring 13 is held under tension by means of the spacer sleeve 18 and the pre-tensioning spring guide 20, since it remains in the tensioned position via the latching cam 21 which is held in the latching recess 24. By the actuation of the trigger 9, the control lever 5 is also rotated backwards (in FIG. 4, counterclockwise) via the trigger rod 8, and via the control surface 26 on its upper side raises the firing pin catch 7, constructed as the catch rod or sliding damper, from the firing pin safety 27 for release of the firing pin 6.
At the release position of the striking lever 2 shown in FIG. 4, the trigger rod 8 disengages from the striking lever 2 so that it initially moves forwards (in FIG. 4, clockwise) under the effect of the trigger spring 14 until the latching cam 21 of the pre-tensioning spring guide 20 moves to a rear surface 29 of the control lever 5. In this way the sleeve-shaped pre-tensioning spring guide 20 rotates around its longitudinal axis such that the latching cam 21 disengages from the latching recess 24 in the striking lever 2. From this time on, the striking lever 2 is pressed into its front end position for the actuation of the firing pin 6 under the effect of the pre-tensioning spring 13 and of the trigger spring 14. In this way it is also possible to make available the firing energy required to fire a cartridge with a small triggering force.

Claims

1. Trigger mechanism for hand firearms, in particular pistols, with a striking lever for the actuation of a firing pin, a pre-tensioning spring associated with the striking lever, a trigger spring associated with the striking lever, a control lever for control of the pre-tensioning spring, and a trigger rod which is connected with a trigger at its front end and which cooperates with the striking lever and the control lever, wherein the pre-tensioning spring and the trigger spring are placed inside the striking lever.

2. Trigger mechanism according to claim 1, wherein the trigger spring is located within the pre-tensioning spring.

3. Trigger mechanism according to claim 1, wherein the pre-tensioning spring is supported on a pre-tensioning spring guide located inside the striking lever.

4. Trigger mechanism according to claim 1, wherein the pre-tensioning spring is supported on the pre-tensioning spring guide via a spacer sleeve.

5. Trigger mechanism according to claim 1, wherein the trigger spring is supported on a trigger spring guide located inside the striking lever.

6. Trigger mechanism according to claim 5, wherein the trigger spring guide is supported on a striking lever pin.

7. Trigger mechanism according to claim 3, wherein the pre-tensioning spring guide is guided so it can be displaced and rotated inside the striking lever, and contains a latching cam for engagement in a latching recess on a latching slot in the striking lever.

8. Trigger mechanism according to claim 7, wherein the control lever comprises a slot for engagement with the latching cam on the pre-tensioning spring guide.

9. Trigger mechanism according to claim 1, wherein the control lever comprises a control surface for the actuation of a firing pin safety for the release or blocking of the firing pin.

10. Trigger mechanism according to claim 1, wherein the trigger rod is associated with an interrupter lever for controlling the engagement of the trigger rod with the striking lever.

11. Trigger mechanism according to claim 7, wherein a stop for the actuation of the latching cam on the pre-tensioning spring guide is associated with the striking lever.

12. Trigger mechanism according to claim 1, wherein the trigger rod is pre-tensioned by a trigger rod spring.