WO2012169929A1

WO2012169929A1 - Trigger mechanism

Info

Publication number: WO2012169929A1
Application number: PCT/RU2012/000175
Authority: WO
Inventors: Артем Алексеевич КОТТ
Original assignee: Общество С Ограниченной Ответственностью "Промтехнология"
Priority date: 2011-06-08
Filing date: 2012-03-15
Publication date: 2012-12-13
Also published as: EP2719989A4; EP2719989A1; RU2470249C1; US20140311006A1

Abstract

The invention relates to the field of gun technology. The trigger mechanism comprises a body, a spring-loaded sear, a trigger with a spring, and adjustment screws, including a screw for adjusting the triggering and a screw for adjusting the triggering motion. The trigger mechanism additionally comprises a screw for adjusting the amount of contact of the trigger with the sear. All of the adjustment screws are mounted in the body and are oriented vertically. The sear is provided with a tooth which can come into contact with a tooth present on the trigger. Furthermore, the trigger tooth surface which interacts with the tooth surface is curvilinear. The technical result consists in increasing the reliability and simplicity of assembling and servicing the device.

Description

DESCENT MECHANISM

Technical field

The invention relates to the field of weapons technology, namely, the triggers of weapons with a longitudinally-sliding bolt, for example, for hunting carbines.

State of the art

Known trigger mechanism of the rifle "BK-5" described in the directory - V.I. Trofimov. "Domestic combined hunting and sporting guns" / Part 2. - M .: "DAIRS", 2000. - p. 140. The known mechanism comprises a housing, a sear with a latch and a lever of a sear, a release lever and a trigger, as well as adjusting screws. This mechanism is structurally complex and, in addition, does not provide forced disconnection of the drummer and whisper, which reduces the reliability of the weapon.

The closest analogue of the invention is the trigger mechanism described in RF patent Ns 2219459, class. F41A 19/24, publ. 12/20/2003, which contains a housing, a spring-loaded sear, a trigger with a spring and adjusting screws; the sear and the trigger in the known mechanism are characterized by the presence of threaded holes for adjusting screws.

The presence of threaded holes in the trigger limits the technological capabilities of manufacturing the trigger and entails the need for additional parts, usually a special solid insert.

The disadvantages of the device according to the specified patent are its structural complexity, which affects the quality and reliability of the trigger mechanism.

When developing the proposed design of the trigger mechanism, the task was to increase reliability, expand the possibilities of regulating the nature of the descent, as well as improve the quality of the descent while constructively simplifying the trigger mechanism, preserving its manufacturability, and ensuring ease of assembly and maintenance of the device.

SUMMARY OF THE INVENTION The solution to this problem is provided by the fact that the trigger mechanism comprising a housing, a spring-loaded sear, a trigger with a spring and adjusting screws, including a trigger adjustment screw and a trigger adjustment screw, includes a trigger for adjusting the trigger engagement value with a sear, and all the adjusting screws are installed in the housing and oriented vertically, and the sear is equipped with a tooth made with the possibility of engagement with the tooth of the trigger, the surface of the tooth of the trigger, interacting whispering with the surface of said tooth, is curved.

The vertical orientation of the screws means that the screws are located to the horizontal axis at an angle of 90 °. By the magnitude of the engagement is meant the magnitude (area) of the interaction of the surfaces of the teeth of the sear and the trigger.

In the particular case of execution of the claimed trigger mechanism may include a technological hole that provides visual control of the magnitude of the engagement of the trigger with the sear.

In an embodiment, the screw for adjusting the trigger engagement value with the sear and the trigger for adjusting the descent stroke are installed in the base of the housing. In an embodiment, the curved tooth surface of the trigger interacting with the tooth surface of the whisper at the time the trigger is cocked has a curved arcuate shape with a radius of curvature (R) of 5-8 mm.

These design features of the claimed trigger mechanism, ensure reliability and safety by expanding regulatory capabilities and improving the quality of the descent. The inventive trigger is characterized by manufacturability, ease of assembly and maintenance.

This is due to the possibility of controlling the magnitude of the engagement of the teeth of the sear and the trigger and the exclusion of the contact of the sharp edge of the tooth of the trigger with the flat surface of the tooth of the whisper due to the curved arched surface under the tooth of the trigger, having a radius of curvature of 5-8 mm. As a result, in the inventive trigger the possibility of jamming of the sear and the trigger at the moment the trigger is cocked is practically eliminated and the possibility of unplanned descent with minimal effort on the trigger is minimized.

Brief Description of the Drawings

The invention is illustrated by the following drawings:

FIG. 1 is a longitudinal section of the trigger in cocked state;

FIG. 2 - the relative position of the teeth of the sear and the trigger when they are engaged in the cocking phase of the trigger mechanism.

Preferred Embodiment

A trigger in accordance with a preferred embodiment of the invention, as shown in FIG. 1, comprises a housing 1 with an aluminum cover (not shown), a technological hole 2, a trigger 3, a sear 4, a release spring 5, a sear spring 6, a release adjustment screw 7, an engagement amount adjustment screw 8, an escapement adjustment screw 9.

Adjusting screws 7, 8 and 9 are installed in the base of the housing and are oriented vertically - at an angle of 90 ° to the horizontal axis. The sear 4 is provided with a tooth adapted to engage with the tooth on the trigger 3.

The tooth surface of the trigger interacting with the tooth surface of the whisper at the moment of cocking is curved, in particular, as shown in FIG. 2, a curved arched surface with a radius of curvature (R) of 5-8 mm.

The magnitude of the engagement means the area of interaction of the surfaces of the teeth of the sear 6 and the trigger 3.

Technological hole 2 allows you to visually control the magnitude of the engagement of the trigger 3 with the sear 6.

The inventive trigger mechanism operates as follows.

To produce a shot, the shooter presses the trigger 3, which rotates around its axis and disengages from the sear 4. In turn, the sear 4 under the influence of the hammer falls down, while the spring of the sear 6 is compressed. The drummer disengages from the fighting tooth of the sear 6 and energetically moves forward. After the shot, the striker performs the reverse movement. When he reaches his extreme position, the whisper 4 under the action of the spring 6 (the spring of the shoulder of the sear 4) is returned to its original position and again engages with the hammer. When this trigger 3 under the action of the trigger spring 5 also returns to its original position.

Trigger adjustment is carried out by adjusting screws 7, 8 and 9.

The adjustment of the descent force is carried out by turning the screw 7, which compresses or releases the spring of descent 5. The adjustment range is from 500 to 900 grams in the “warmint” variant and, in the case of installing a stiffer spring of the descent, from 1000 to 1500 grams in the “hunting” variant. A hole is provided in the trigger 3 to adjust the position of the screw 7 by means of a hex key.

The magnitude of the engagement of the trigger 3 is carried out by turning the screw 8 and can be visually controlled through the technological hole 2. The trigger 3, under the action of the trigger spring 5, abuts the screw 8 and is in constant contact with it. By turning the screw 8, you can adjust the start point of rotation of the trigger 3. The trigger 3 is meshed with the sear 4. Changing the start point of the rotation changes the amount of engagement of the trigger 3 with the sear 6. The trigger restriction is adjusted by turning the screw

9. When the screw 9 is rotated, the trigger interval decreases or increases after opening with the sear 6. This allows better control of the moment of the shot and significantly increases the comfort and accuracy of shooting. All of the above processes for adjusting the position of the screws can be carried out using hex keys without disassembling the rifle. This is due to the fact that access to the screws is provided from the outer surface of the housing. In the inventive trigger mechanism due to the possibility of adjusting the trigger force and balanced trigger, the possibility of unplanned descent is minimized with little effort on the trigger. In addition, the possibility of seizing the sear and the trigger at the moment the trigger is cocked is practically excluded, since the release spring and the whisper spring at the indicated moment work to open the sear and the trigger. In addition, the shape of the friction surfaces of the sear and the trigger eliminates the possibility of contact of the sharp edge of the tooth of the trigger with the flat surface of the tooth of the sear. Due to the curved arched surface under the trigger tooth, which has a radius of curvature of 5-8 mm in accordance with the invention, a decrease in the friction force is achieved when the surfaces of the teeth of the sear and the trigger are in contact. A slight force of the sear spring (0.8 kgf) does not affect the cocking of the weapon. The trigger mechanism in accordance with the invention is characterized by ease of assembly and maintenance, improving the quality and reliability of the work.

Industrial applicability

The inventive trigger can be manufactured according to standard modern technology using conventional materials and is suitable for use in non-automatic and self-loading small arms.

Claims

CLAIM

one . The trigger mechanism, comprising a housing, a spring-loaded sear, a trigger with a spring and adjusting screws, including a trigger adjustment screw and a trigger adjustment screw, characterized in that

said trigger mechanism comprises a screw for adjusting a trigger engagement value with a sear,

adjusting screws are installed in the trigger housing and are vertically oriented,

the sear is provided with a tooth adapted to engage the trigger tooth, and

the tooth surface of the trigger, interacting with the surface of the specified tooth whispered at the time of cocking the trigger, is made curved.

2. The trigger according to claim 1, further characterized in that the housing has a technological hole that provides visual control of the magnitude of the engagement of the trigger with the sear.

3. The trigger mechanism according to claim 1 or 2, further characterized in that the screw for adjusting the amount of engagement and the screw for adjusting the course of the descent are installed in the base of the housing.

4. The trigger mechanism according to claim 1, further characterized in that said curved surface of the tooth of the trigger is a curved arcuate surface and has a radius of curvature of 5-8 mm.