EE01505U1 - First stage adjusting device for a two-stage rescue mechanism - Google Patents

Abstract

The invention relates to an adjustment device for the first stage of a two stage release mechanism that comprises a trigger with interacting trigger bar and trigger heel on an axle, a pressurized lever on its own axle and a cam lever with first stage adjustment screw. The novelty lies in the adjustment device comprising a geometrically repositionable device for adjusting the pull force of the first stage of the trigger by changing the arms of force of the trigger and the cam lever, whereas the device for adjusting the pressing power of the first stage of the trigger is a turnable eccentric positioned in the end of the cam lever and housing the adjustment screw of the first stage.

Description

Technical field

The invention belongs to the field of firearms, both firearms and firearms powered by spring force or elastic material (e.g. rubber), and relates to a rescue mechanism.

State of the art

Document US3950876, J.G. Anschutz GmbH, F41C 19/00, 1976, discloses a firearm safety mechanism, where in Figure 1, in the opening 5 of the trigger 2, there is a first-stage adjustment spring 6 of the safety mechanism, which is connected to the adjustment sector 26 located on the axis 27 and whose tensile strength can be adjusted by a screw 29. A disadvantage of the design is the fatigue of the first-stage adjustment spring or its breakage.

The essence of the invention

The object of the invention is to improve the first-stage adjustment device of a two-stage rescue mechanism so that the design does not include a tiring or breaking adjustment spring.

The stated objective is achieved in that the first stage adjustment device of the two-stage trigger mechanism, which includes a trigger bar and a trigger with a trigger heel located on an axis and interacting with each other, and a tail located on its axis under spring pressure and an angle bar with a first stage adjustment screw, includes a device with a variable geometric position for adjusting the first stage pressing force of the trigger by changing the force arms of the trigger and the angle bar, wherein said device is a rotatable eccentric, in which the first stage adjustment screw is also located. By rotating the eccentric, the first stage force arm of the trigger and the angle bar can be changed so that the force of pressing the trigger on the sole changes and the first stage pressing force of the trigger can be adjusted.

Preferably, the eccentric is arranged in the tail of the angle bar, but the eccentric may also be arranged in the trigger bar.

Preferably, the angle bar has a hole in the tail for the eccentric and an adjacent partial hole for inserting a Torx screwdriver, the eccentric having a groove for the fixing screw, a threaded hole for the first stage adjustment screw and a partial toothed belt for the Torx screwdriver.

List of illustrations

The improved rescue mechanism and its parts are described in the following examples and the drawings attached to the description of the invention.

Figure 1 shows a rescue mechanism with a cutaway body and no front.

Figure 2 shows the angle bar with parts

Figure 3 shows an eccentric in an isometric view from below.

Figure 4 shows a completed angle bar with the eccentric on it in a 180-degree position.

Figure 5 shows the changing of the eccentric position.

Figure 5a shows an angle bar with an eccentric in a 90-degree position.

Figure 5b shows an angle bar with an eccentric in a 180-degree position.

Figure 6 shows the lengths of the force arms of the rescue mechanism when the eccentric is in the 0-degree position.

Figure 7 shows the lengths of the force arms of the rescue mechanism when the eccentric is in the 180-degree position.

Example of device implementation

Figure 1 shows a cutaway of the casing 1 and the escape mechanism without a front face. On the axis 1.1 in the casing 1, there is a trigger 2 with a bar 2.1, on the axis 1.2 there is an angle bar 3, on the sole 3.1 of which a spring 4 acts, and on the tail 3.2 the bar 2.1 of the trigger 2 acts through the first-stage adjustment screw 7 and the second-stage adjustment screw 8.

Figure 2 shows the angle bar 3 with its parts. The spring 4 acts on the sole 3.1, which

pushes the tail 3.2 of the angle bar 3 located on the axis 1.2 with a force f up in the direction x (Fig. 6). The tail 3.2 of the angle bar 3 has a hole 3.3 for the eccentric 5, a threaded hole 3.4 for the second stage adjustment screw 8, a threaded partial hole 3.5 for the fixing screw 6 and a partial hole 3.6 for a Torx screwdriver 9.

Figure 3 shows an eccentric 5 with a groove 5.1 for a fixing screw 6, a threaded hole 5.2 for a first-stage adjustment screw 7, and a partial toothed belt 5.3 for the tip 9.1 of a Torx screwdriver 9. The toothing of the toothed belt 5.3 overlaps the toothing of the tip 9.1 of the Torx screwdriver 9. The eccentric 5 has a vernier scale 5.4 for monitoring the position of the eccentric 5.

Figure 4 shows the change of position of the eccentric 5. By loosening the fixing screw 6, the eccentric 5 can rotate on its axis 5.5 (Figure 2). To do this, the tip 9.1 of the Torx screwdriver 9 is placed in the hole 3.6, the teeth of which overlap with the teeth of the toothed belt 5.3 of the eccentric 5, and the Torx screwdriver 9 is turned, the tip of which represents a driving gear. When a suitable position is found, the eccentric 5 is fixed in a stationary position by means of the fixing screw 6.

In Figure 5, the eccentric 5 is in the 0-degree position. In Figure 5a, the eccentric 5 is in the intermediate, 90-degree position. In Figure 5b, the eccentric 5 is in the 180-degree position.

In Fig. 6, the spring 4 presses the angle bar 3 with a force f onto the base 3.1 located on the axis 1.2, thereby pushing the tail 3.2 of the angle bar 3 up in the x direction. The first-stage adjustment screw 7 located in the eccentric 5, in turn, presses the trigger 2 located on the axis 1.1 onto the bar 2.1, trying to rotate the trigger 2 in the y direction, thereby pressing the heel 2.3 of the trigger 2 against the step 1.3 located in the housing 1 (Fig. 1), whereby the range of travel of the trigger 2 can be changed using the adjustment screw 10.

In Figure 6, the eccentric 5 together with the first stage adjustment screw 7 is in the 0-degree position. This forms the first stage force arm of the angle bar 3 with a length of A1 and the first stage force arm of the trigger 2 with a length of B1. With these force arm lengths, the greatest force F1 is required to press the sole 2.2 of the trigger 2, i.e. the first stage of the trigger is the stiffest.

In Figure 7, the eccentric 5 together with the first stage adjustment screw 7 is in the 180-degree position, forming a first stage force arm of the angle bar 3 with a length of A2 and a first stage force arm of the trigger 2 with a length of B2. For these force arm lengths, the sole of the trigger 2 has a length of 2.2

The least amount of force is required to press F2, meaning the first stage of the trigger is the softest.

In this design, the eccentric 5 is located in the hole 3.3 in the tail 3.2 of the angle bar 3, but if the design of the rescue mechanism is changed to a certain extent, the eccentric 5 can also be located in the bar 2.1 of the trigger 2 (in a possible hole in the bar 2.1 of the trigger 2) and the result would be the same. Therefore, the angle bar 3 is not the only possible location for the eccentric 5.

Such a construction can be implemented in different ways and with other details and by changing the geometric position of these parts, an eccentric is one of the possible options.

List of symbols

1 housing

1.1 trigger axis

1.2 angle bar axis

1.3 degree

2 trigger

2.1 trigger bar

2.2 trigger sole

2.3 trigger heel

3 corner bars

3.1 spring sole

3.2 tail

3.3 opening

3.4 hole

3.5 partial opening

3.6 part opening for Torx screwdriver

4 springs

5 eccentric

5.1 fixing clamp groove

5.2 adjustment screw hole

5.3 timing belt

5.4 vernier scale

5.5 axis

6 fixing screws

7 first stage adjustment screw 8 second stage adjustment screw 9 Torx screwdriver

9.1 Torx screwdriver bit

10 adjustment screws

f spring force vector

x direction of movement

y direction of movement

A1 power arm

A2 power arm

B1 power arm

B2 power arm

F1 force vector

F2 force vector

Claims (6)

1. A two-stage first-stage adjustment device for a trigger mechanism, comprising a trigger bar and a trigger with a trigger heel located on an axis and interacting with each other, and a tail located on its axis under spring pressure and an angle bar with a first-stage adjustment screw, characterized in that it comprises a device with a variable geometric position for adjusting the first-stage pressing force of the trigger by changing the force arms of the trigger and the angle bar. 2. The adjusting device according to claim 1, characterized in that the device for adjusting the first stage pressing force of the trigger is a rotatable eccentric (5) in which the first stage adjusting screw is located. 3. Adjustment device according to claim 2, characterized in that the eccentric (5) is arranged in the tail (3.2) of the angle bar (3). 4. Adjustment device according to claim 2, characterized in that the eccentric (5) is arranged on the trigger bar (2.1). 5. Adjustment device according to claim 3, characterized in that the angle bar (3) has an opening (3.3) for the eccentric in the tail (3.2) and an adjacent partial opening (3. 6) For inserting a Torx screwdriver (9), the eccentric (5) having a groove (5.1) for the fixing screw (6), a threaded hole (5.2) for the first stage adjustment screw (7) and a partial toothed belt (5.3) for the Torx screwdriver (9).