FR2619440A1 - Device for staging the pressure exerted on a trigger shank of a firearm, air or gas weapon - Google Patents

Abstract

The invention relates to a device making it possible to have one or more steps in the pressure exerted on the trigger shank of a weapon. It consists of a movable part receiving the index finger exerting the pressure, which part is articulated about an axis b'. A pressure P2 exerted at a makes it possible to compress the spring until the faces f and f' come into contact, creating a mechanical stop. When the pressure P2 reaches the value of the pressure P1, the trigger shank assembly, articulating about the axis b, releases the mechanism M at c.

Description

 The present invention relates to a device for providing one or more bearings in the pressure exerted on the trigger tail of a firearm, air or gas.

 In the practice of shooting, and in particular in the practice of shooting sport, the realization of a precise shot is in close relation with the pressure exerted on the trigger of the weapon. Whether it is a handgun or a long gun, the pressure exerted on this tail must be progressive to avoid inadvertent misalignment of the weapon. The difficulty is therefore to have good tactile sensitivity of the finger exerting pressure, particularly when this pressure is important, to estimate at any moment the value of this pressure.

 In some weapons, especially semiautomatic guns, this pressure staging is performed by a trigger plate. The trigger tail, on which the pressure is exerted, transmits it by means of a rod to the plate.

 This device is complex, expensive, and, because of its volume, can not always be easily mounted on certain weapons, particularly rotating barrel guns (or revolver).

 Figure 1 shows the conventional system where a pressure P1 exerted at a allows the articulation of the trigger about an axis b, thus releasing the mechanism M in c which will cause the percussion and the start of the stroke.

 The device according to the invention overcomes this disadvantage by incorporating the pressure distribution system to the trigger tail itself.

 Figure 2 shows a movable part receiving the index exerting pressure, which is articulated around an axis b '. A pressure P2, exerted at a, compresses the spring, until the faces f and f 'come into contact, thereby creating a mechanical stop. When the pressure P2 reaches the value of the pressure Pi of FIG. 1, the set of detent hinge articulates around the socket b, releases the mechanism M in c as indicated in FIG.

 In a preferred version, the absorption of the pressure P2 is by a compression coil spring. It can also be made by a leaf spring.

 The value of the pressure P2 is related to the stiffness of the spring. The percentage of P2 with respect to P1 (P1> P2) is therefore conditioned by the stiffness of the spring.

 During the articulation of the detent tail around b ', there is a sliding of the axis of the spring relative to the face f. A ball placed at the top of the spring allows this sliding to be unctuous and not to disturb the progressivity of the pressure P2.

 In the absence of pressure P2, the spring is relaxed. A mechanical stop occurs by the contact of the faces fl and fi 'preventing the trigger tail from going further and determining the stroke 1 of the pressure P2.

Claims (5)

 1) Device for staggering the pressure exerted on a gun, air or gas expansion tail, characterized in that the pressure is set in the detent tail itself.  2) Device according to claim 1 characterized in that the trigger is composed of two parts: trigger and upper attachment part of the mechanism M.  3) Device according to claim 2 characterized in that these two parts are connected by an axis b '.  4) Device according to claims 2 and 3 characterized in that is interposed between these two parts a coil spring surmounted a ball or leaf spring.  5) Device according to any one of the preceding claims characterized in that the pressure P1 for tilting the mechanism M in c is decomposed P2 + (P1 - P2).