SE451630B - DEVICE FOR PRINTING MECHANISM - Google Patents

Description

15 20 25 30 35 451 630 a cleaner pressure and reduced frictional resistance in the trigger. This object is achieved in that the device according to the invention has obtained the features stated in claim 1.

Further developments of the invention appear from the sub-patent claims.

The invention will be described in more detail below with reference to the accompanying drawing, which shows two different embodiments of the invention.

Figure 1 schematically shows a cross section of the device according to a preferred embodiment of the invention. Figure 2 shows a front view of a trigger rod included in the device according to the invention. Figure 3 shows a longitudinal section on an enlarged scale of a roller included in the device according to the invention. Figure 4 shows a variant of the embodiment shown in Figure 1.

Figure 1 schematically shows a part of a mechanism for a handgun (not shown), for example a rifle. The mechanism generally comprises a spring-biased series connection consisting of a trigger 1, a trigger link 2, a trigger rod 3 and a only partially indicated stroke mechanism in the form of a strike element 4. The trigger link 2 and the trigger rod 3 thereby form a first and a second element, respectively, which can slide out of engagement with each other by acting on the trigger 1.

The trigger 1, which is rotatably mounted about a stationary shaft 5, is held in the inactive position shown in figure 1 by a spring 6. The trigger 1 has an arm 7, which with a lug 8 is intended to influence the trigger link 2 when fired.

The trigger link 2, which is also rotatably mounted about the shaft 5, is held by a spring 9 pressed against a hook-up member in the form of a roller 10, which is rotatably mounted about a shaft 11 in the trigger rod 3. .

The trigger rod 3, which is mounted around a stationary shaft 12, is clamped against the percussion element 4 by means of a spring 13, which in turn presses against the trigger rod 3 with a spring 14, the spring force of which is considerably greater than that of the spring 13.

The roller 10 abuts with its outer casing surface 10a against two support surfaces 15 and 16 in an angular shelf 17 formed in the trigger link 2.

The roller 10 has an internal, curved abutment surface 10b against the shaft 11, see figure 3. As a result, the roller 10 can adjust obliquely and always with its outer jacket surface 10a abut with equal pressure along its contact points against the support surfaces in the angle shelf 17, even if this is not parallel to the bearing shaft of the roller. .ëë The function of the device is as follows.

When firing, the trigger 1 presses the lug 8 in the direction of the arrow A against the trigger link 2, which against the action of the spring 9 is rotated out of engagement with the engagement roller 10 of the trigger rod 3, the trigger link 2 moving in the direction of the arrow B.

In this case, the roller 10 rotates about its axis 11, and rolls over the support surface 15 in the trigger link 2. When the spring force of the spring 14 is considerably greater than the spring 13, the trigger rod 3 rotates rapidly in the direction of the arrow C and triggers the explosive element 4 in the arrow D direction.

By the arrangement described above an extremely clean pressure is obtained, thanks to the roller 10 with constant surface pressure and greatly reduced friction rolling out of engagement with the trigger link 2. The roller's only sliding contact surface faces the roller shaft 11, which can easily be given a very hard, round and smooth surface. Another advantage of the invention is that no individual adaptation needs to be made, since all parts of the mechanism can be mounted or exchanged with each other.

Furthermore, the rolling intervention means that no noticeable wear of the respective parts occurs.

A variant of the embodiment according to Figure 1 is shown in Figure 4. The device according to Figure 4 corresponds to that in Figure 1, except that the trigger link 2 is directly hooked by a percussion element or male 4 ', ie without any intermediate connection of a trigger rod. . The striking element 4 'is mounted around an axis 18, and rotatable in the direction of the arrow D', analogous to the movement D of the striking element 4 in Figure 1.

The roller 10 is mounted in the percussion element 4 'in a completely analogous manner as the roller 10 is mounted in the trigger rod 4 according to Figures 1-3.

Although the roller in the two embodiments shown is arranged to cooperate with a trigger link 2, it is obvious within the scope of the invention that the engagement can instead take place directly with the trigger 1, if this is given a shape adapted for this purpose.

In the embodiments shown, the roller is mounted in the trigger rod or percussion element, but can of course alternatively be mounted in the trigger link (or the trigger).

The invention is also not limited to firearms, but is also applicable to, for example, crossbows. 1 t?

Claims (2)

W) 10 15 20 25 30 35 451 630 Patent claims Device for a trigger mechanism for weapons, comprising a trigger (1) and a spring-actuated percussion element or male ~ (4; 4 ') and at least one intermediate element (2, 3) for operatively connecting the trigger with the percussion element and the trigger, the trigger, the striking element and the male and the intermediate elements, respectively, forming a spring-biased series connection of in turn actuable members, which series connection is arranged to be maintained spring-biased by a hooking means (11) capable of abruptly tensioning the biased the series coupling, so that the percussion element is triggered, and wherein the hooking means constitutes an operative connection between two successive of said means (2, 3; 2, 4) in the series coupling, characterized in that the hooking means (11) is constituted by a roller, which is arranged to provide a rolling engagement between said two successive members (2, 3; 2, 4 '). Device according to claim 1, characterized in that the roller (11) is stored in the percussion element (4 ') or in one of said intermediate elements (3). Device according to any one of the preceding claims, characterized in that the roller (11) is capable of turning and rolling over an engaging surface in said roller engagement due to the action of the trigger (1).