MXPA06008078A - Fire control adjustment system - Google Patents

Abstract

An adjustable fire control for firearms having as series of adjustable engagement settings between the sear (12) and the trigger (11), including a trigger engagement adjustment (25) including a preset engagement (27) and an adjustable engagement (28) for setting the amount of displacement of the trigger (11) with the sear (12) for firing the firearm.

Description

Declarations under Rule 4.17: before the expiration of the time limit for amending the - as to the applicant and entitlement to apply for and be granted to claims and to be republished in the event of the recet of patent (Rule 4.17 (ii)) for all designations amendmenls - as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17 (iii)) for all designations - of inventorship (Rule 4.17 (iv)) for US only Published: - with intemational search report TRIGGER CONTROL SETTING SYSTEM TECHNICAL FIELD The present invention relates to a trigger control mechanism for a firearm and more particularly to a trigger mechanism having adjustable coupling settings.

BACKGROUND OF THE INVENTION The trigger of a firearm is intended to initiate the firing sequence of the firearm. Typically, when the trigger is triggered, a fastener operatively connected to it is uncoupled from the immobilization coupling with a hammer / hammer or firing pin from the firearm, which in turn strikes a round of ammunition inside the firing chamber. Shooting. The sensitivity of the trigger in this way is of particular importance in the operation of the firearm. For example, pulling a trigger that is too heavy is generally undesirable since it can lead to trigger jerking that can cause deflection or misalignment of the weapon immediately before firing and miss the target of the firing. On the other hand, pulling a trigger too light can cause problems of unintentional or unintentional discharge of the firearm, especially if it falls or is shaken in some other way. In addition, with multi-barrel firearms, the pull of the trigger must not be too light to avoid supplication, that is, the undesirable or unintentional release of a second firing pin which may cause the firing of more than one round at Same time. The trigger and sear generally are calibrated so as to provide a coupling between these parts that can ensure a desired pull or response of the trigger. However, due to normal manufacturing tolerances, this coupling can vary from very tight to very loose. This variation or ease is described as the "compensation" of the trigger. In addition, after prolonged use, additional compensation or looseness may develop in the coupling between the trigger bar and the sear. Such "compensation" or ease in the action of the trigger is undesirable from the point of view of the users since the accuracy of the trigger depends to a large extent on the responsiveness of the trigger and therefore the more adjusted the trigger response more accurate will be the good aim. Some shooters consequently try to become more tight or adjust the trigger's responsiveness to their own preferences, although often to such an extent that the firearm becomes unsafe without realizing that the newly adjusted trigger graduation represents a problem. Since the engagement area between the trigger and the sear is a small amount, typically between approximately 0.61 mm (0.024 inches) to 0.69 mm (0.027 inches), the measurement of a graduation typically requires the use of an optical comparator and therefore it is difficult for the user to determine the new graduations resulting from the adjustment and the dangers that can result from a graduation that is too small. In this way, the re-graduation of the firearm to the original factory graduation or to determine if the graduation is generally safe, is not possible for a common user. Thus, what is needed is an apparatus that allows an easy and concise adjustment of various operating parameters of a firearm trigger assembly to a desired graduation by the user to "adjust" the trigger to a minimum safety level of operation.

BEVE DESCRIPTION OF THE INVENTION Briefly described, in accordance with the present invention, a trigger control assembly or trigger mechanism for firearms is provided having a series of adjustments for adjusting various couplings or operative gradations of the trigger mechanism components to adjust or " to establish adjustments "of the response capacity and function or operation of the trigger mechanism to adapt it to the preferences of the user, and at the same time maintain an adequate functioning of the trigger mechanism. The trigger mechanism of the present invention generally includes a movable trigger that is formed within a trigger housing and a detent adapted to engage the trigger to prevent movement of the firing pin or of a hammer / firing pin of the firearm in which it is Mounts the present trigger mechanism. The trigger is deflected to a position at rest, with no coupling in which the movement of the sear is blocked out of engagement with the firing pin until the trigger moves during the firing operation to ignite a round of ammunition from the firearm. The trigger mechanism of the present invention also includes a series of adjustment mechanisms for adjusting approximately five different operational characteristics of a trigger mechanism. Among the adjustment mechanisms are an adjustment on the displacement and a trigger pull adjustment. The adjustment on the offset helps to set or set the amount of backward movement of the trigger after releasing the sear or hammer, while the trigger pull adjustment adjusts the force required to move the trigger to a position to release the trigger. guarantor. Trim and pull trigger mechanisms typically include adjustment screws, bolts or other similar devices that are received within the perforations formed within the trigger housing. The position of the adjustment screws or bolts is adjustable by coupling a tool, such as a screwdriver or similar tool, in the head portion thereof to move the adjustment screws longitudinally along their respective perforations. In addition, a minimum and maximum trigger coupling adjustment is provided, which includes a first outer sleeve or sleeve or a screw projecting through the front portion of the trigger. Typically, the maximum coupling setting of the trigger is set or set at the factory to provide a maximum trigger coupling or a safety limit for the trigger mechanism. A minimum trigger coupling bolt or bolt will be additionally received within the outer sleeve or the first coupling screw and will be adjustably moveable along the same to establish a minimum trigger coupling for the trigger mechanism. Finally, a trigger lock adjustment will be provided to adjust the displacement or engagement between the safety portion and the rear part of the trigger gun. The trigger lock adjustment will typically include a set screw or bolt received in the rear of the trigger gun, with its position with respect to the safety that is generally set at the factory and can be fixed by additional adjustment. Various objects, features and advantages of the present invention will become apparent to those skilled in the art upon reaction to the following detailed description, when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates the trigger assembly combined with a firearm; Figure 2 illustrates a cross-sectional view of the trigger mechanism of the present invention; Figure 3 is an expanded view of the trigger of the present invention; and Figure 4 is a side elevation view showing the coupling between the trigger and the sear.

DESCRIPTION OF THE PREFERRED MODALITY Referring now to the drawings in which similar numbers indicate similar parts in the various views, Figures 1 to 4 illustrate the adjustable trigger control or trigger mechanism 10 of the present invention, particularly for use in a firearm. F. Trigger mechanism 10 includes a series of five adjustable adjustments or coupling adjustments to "adjust" or vary the responsiveness or action of trigger 11 of the trigger mechanism as needed for ease of repair and maintenance and / or to adjust it to the user's preference. Further, although the firearm F has been shown in Figure 1 as a bolt action rifle, it will be understood by those skilled in the art that the trigger mechanism 10 of the present invention can also be used in other types of firearms. firearms that include various types of rifles, shotguns and other long weapons as well as pistols.

As indicated generally in Figures 2 to 4, between the trigger mechanism settings that can be made with the trigger mechanism 10 of the present invention are an adjustment on the displacement to adjust the amount of movement of the trigger moving away of the sear when the shot is taken; a trigger pull adjustment to adjust the sensitivity or amount of force that is required to move the trigger and release the sear 12 to fire the firearm F; a trigger coupling setting that includes a maximum or minimum coupling adjustment to adjust the amount of interference or clearance between the trigger 11 and the sear 12, or the amount that the trigger must move on the mating surface between the trigger and the guarantor to release the guarantor and fire the firearm; and a safety coupling or trigger lock adjustment as indicated in Figure 2. As indicated in Figures 2 to 4, the trigger 11 is generally coupled to the sear 12 at a coupling point or contact area 13, between the trigger and sear with the amount or distance of the point or contact area generally known as the coupling graduation. The coupling graduation is typically measured in thousandths of an inch, with radial displacement of the trigger therefore resulting in a reduction of said coupling graduation. A reduced coupling rating "adjusts" the trigger. In the present invention, the trigger coupling graduation includes a preset range and variable or adjustable coupling range. The preset coupling is usually set at the factory to a predetermined maximum coupling graduation that may not be altered by the user. The variable coupling setting allows the user to adjust the coupling setting to a minimum coupling setting, which is generally limited to a predetermined range or limit. Returning now to the figures, figures 2 to 4 generally illustrate the firing control or trigger mechanism 10 of the present invention in both cross section and perspective, exploded views. The trigger mechanism 10 includes a trigger 11 having a trigger body 15 which is generally formed of a metal such as steel or other durable high strength material. The trigger body includes an integrally formed user engaging fastening portion 16 projecting downward therefrom, as well as a front trigger arm portion 17 and a rear trigger arm portion 18. The trigger 11 is typically housed in a trigger housing 21, which is generally formed of a similar high strength material such as steel, other metals or other similar materials, wherein the trigger 11 is pivotally connected to the trigger housing 21 by a pivot pin 22. As indicated in figure 2, the sear 12 is also generally mounted pivotally within the trigger housing 21 for example by a pivot pin 23 and is typically biased to an enhanced position, as shown in Figure 2, by a spring 24. The trigger 11 is adapted to engage the latch 12 at an upper end of the trigger body at the coupling point 13 (figures 2 and 4). In turn, the sear is adapted to engage the striker P (Figure 1), which releases the sear before the movement of the trigger so that the striker will contact or strike a round of ammunition A to initiate the firing of the round of ammunition. As shown in Figures 2 to 4, the engagement fitting assembly of the trigger or the mechanism 25 is provided along the front arm portion 17 of the trigger 11 and includes a preset or maximum engagement fit 27 and an adjustment 28 variable or minimum coupling. The maximum coupling fit 27 is generally shown in Figures 2 and 3 as a cylinder or sleeve 29 that is within a bore 30 that is formed along the front trigger arm portion 17, although it will also be understood that this sleeve 29 may be integrally formed additionally within the front trigger arm portion or may be attached at the distal or free end thereof. The sleeve 29 of the maximum coupling fitting 27 includes a bore or channel 31 extending therethrough which can generally be threaded to accept the variable or minimum coupling fit 28. The minimum or variable coupling fit 28 can generally include a set screw, bolt or similar device which is received therein, and which can move vertically along the bore or channel 31 of the sleeve 29 in the direction of arrows 32 and 32 '. The variable coupling fitting 28 can be fixed within the sleeve 29 so as to prevent the variable coupling adjusting screw or similar device 28 from being released and furthermore can be limited to allow only adjustments within a predetermined safe range of adjustment for the trigger coupling graduation. Still further, although the variable coupling fit 28 is generally shown as an adjusting screw or other threaded fastener received within a sleeve or cylinder, other adjustment mechanisms other than the threaded screw and / or sleeve may also be used as far as possible. that such adjustment mechanisms allow a substantially accurate and consistent adjustment of the trigger coupling graduation. As further indicated in Figures 2 and 4, the interaction or coupling point 13 between the sear 12 and the trigger body 13 is established by the adjustment or movement of the trigger coupling adjustment mechanism 25. Generally, the trigger coupling graduation or contact area between the sear and the trigger is considered to be approximately 0.3 mm (0.01 inches) to about 0.9 mm (0.035 inches), although this coupling graduation may be further varied to include greater or lesser amounts of coupling as needed and not desired, depending on the desired performance characteristics for the firearm F in which the trigger mechanism or trigger control 10 of the present invention is to be used. Typically, a maximum trigger assembly will be graduated between approximately 0.56 mm (0.022 inches) and approximately 0.76 mm (0.03 inches) or greater. This maximum coupling graduation is generally established at the factory during or after the manufacture of the firing control or assembly of the firearm by movement or adjustment of the sleeve 29 of the pre-set coupling adjustment 27 in the direction of the arrows 34 or 34 ' (Figure 2) along the perforation or channel 30 within the portion 17 of the front trigger gun. Once graduated, the maximum coupling adjustment sleeve will generally be fixed in place by the factory, for example by the application of a sealant or resin material such as "tightening and immobilization". Subsequently, the trigger coupling graduation for the trigger assembly can be reduced by further adjusting to a minimum engagement setting of typically about 0.25 mm (0.01 inches) by adjustment or movement of the variable coupling adjustment. The variable coupling fitting 28 is generally designed to move in the direction of the arrows 32 and 32 'along the bore or inner channel of the sleeve 29 so as to allow the reduction of the trigger coupling setting generally to approximately 50%, up to approximately 100% of the preset or maximum coupling graduation, with a minimum value of the variable coupling graduation that is generally fixed at or around approximately 0.25 mm (0.01 inches) for safety considerations.

As further illustrated in FIG. 2, a trigger pull adjustment mechanism 40 adjacent to the upper end of the trigger body 15 is provided. The trigger pull adjustment is designed to enable adjustment of the amount of force that must be applied to the trigger to move the trigger and release it from engagement with the sear 12 which generally includes a set screw, bolt or similar device 41 received. within a hole or channel 42 that is formed within the trigger housing 21. Typically, the orifice or channel 42 of the trigger housing will be a threaded hole adapted to receive the adjusting screw 41 therealong. The adjusting screw typically further includes a head portion 43 having a recess 44 that is formed therein into which a tool such as a screwdriver, wrench or mounting device can be inserted for engagement and cause movement of the screw of adjustment along the hole 42 in the direction of the arrows 46 and 46 '. A spring 47 which is generally received within the rear end of the hole 42, with a first end 48 or proximal end of the spring that is received at least partially within the hole 42 so that it can be engaged by the adjusting screw 41. A second end 49 or distal end of the spring is received in the recess 51 that is formed within the trigger body 15 so as to secure the distal end of the spring preventing lateral or vertical movement. The adjustment screw 41 moves in the direction of the arrow 46 along the hole 42, causes the compression of the spring 47 and inversely, when moving the adjusting screw in the direction of the arrow 46 'it releases the compression in the spring. As a result, as the spring compression increases, the amount of force required to move the trigger during the pulling of the trigger increases correspondingly, while releasing the compression in the spring lightens or reduces the amount of force required. to pull the trigger so that the pull of the trigger can be varied due to the user's preference for reduction of the inactivation time and a tighter response of the trigger. The adjustment of the trigger can additionally be set with a minimum amount of trigger pull so as to limit the trigger pull adjustment by the user within a predefined interval. Figure 2 further illustrates the adjustment on the displacement by the trip control of the present invention, which includes an adjustment mechanism 55 on displacement within an upper portion of the trigger housing 21. The adjustment mechanism on the displacement adjusts the amount or extension of movement of the trigger during the pulling of the trigger, and therefore returns to the coupling with the sear. The adjustment 55 on the displacement generally includes an adjusting screw or a similar adjustment device or mechanism 56 that is received within a hole 57 that is formed through a portion of the trigger housing 21. The perforation 57 is typically threaded so as to allow the relatively precise adjustment or movement of the adjusting screw 56 of the adjustment mechanism 55 over the displacement in the direction of the arrows 58 and 58 'towards or away from the coupling with an upper end. of the trigger body 15, as indicated in figure 2. Additionally, a trigger lock adjustment 60 is provided to adjust or adjust the coupling between the trigger and the safety mechanism 61 before the actuation of the safety mechanism to prevent the movement of the trigger. The trigger lock adjustment mechanism 60 is generally provided or mounted within the rear arm portion 18 of the trigger body 15, as shown in Figures 2 and 4, although it can also be integrally formed with the arm portion. rear of the trigger body or is fixedly attached to the distal end thereof. As indicated in figures 2 and 3, the safety mechanism 61 generally includes a safety arm or shoe 62 having a lever or engagement portion 63 at its upper end that typically projects outwardly from the handle and a firearm receiver as indicated in the figure 1, for coupling by the user. The safety weapon is pivotally mounted to an upper end of the trigger housing 21 (FIG. 2), for example by means of a pivot bolt 64 so that it is pivotable in the direction of the arrows 66 and 66 'between a non-engaging position and a coupled, lowered position which engages the trigger block adjusting mechanism 60 and prevents further backward movement of the trigger 11. The trigger block adjusting mechanism 60 is shown here to include an adjusting screw 70 which it is received within a hole 71 that is formed within the rear trigger arm portion 18, although it will also be understood that other types of similar adjustment devices may also be used. The adjusting screw 70 is generally adjustable by threaded movement thereof along the hole 71 in the direction of the arrows 72 and 72 'so that the distance in which the head portion 73 of the adjusting screw 70 is adjusted is adjusted. projects above the rear trigger arm portion 18 to a desired point at which the lower portion 76 of the safety arm 62 will engage at a contact tightening point to substantially ensure minimal or no movement of the trigger before engagement of the security mechanism 61. By providing such variable adjustments of the trigger assembly or trigger control mechanism, the present invention enables the manufacture of the various components of the trigger mechanism such as safety and trigger with a wider range of manufacturing tolerances, in instead of requiring a highly precise coupling between the mechanism and the trigger, which in turn allows to reduce the manufacturing costs in such parts and still provide a close and precise coupling between the safety mechanism and the trigger of the trigger control. In addition, once established, the trigger lock adjustment will typically be fixed permanently, for example by welding or the use of a sealing material such as resin, such as tightening and immobilization, to another similar material. It is also possible to allow the trigger lock adjustment to remain unfixed, as needed or desired for maintenance or other adjustment of the trigger control mechanism after extensive use. Although the present invention has been described with various modalities, it is understood that the modifications and variations may be utilized without departing from the spirit and scope of the invention, as will be readily understood by those skilled in the art. Such modifications and variations are considered to be within the scope and scope of the appended claims and their equivalents.

Claims (25)

NOVELTY OF THE INVENTION CLAIMS

1. - A fire control for firearms, characterized in that it comprises: a trigger where the trigger comprises a body having a coupling portion with the user projecting downwards from it, a front trigger arm and an arm of the rear trigger, and wherein the rear trigger arm includes a trigger lock adjustment adapted to engage a lock; a sear adapted to engage the trigger at a coupling point where the coupling point between the sear and the trigger can be adjusted to a desired coupling graduation; and a series of adjustments for adjusting a series of desired operation coupling graduations for the trigger, which includes a trigger coupling adjustment comprising a minimum and maximum coupling adjustment for controlling the lateral displacement of the trigger off! coupling with the sear.

2. The trigger control according to claim 1, further characterized in that the trigger coupling adjustment comprises a coupling sleeve and an adjustable coupling screw that is threadably engaged within a cylinder.

3. A fire control for firearms, characterized in that it comprises: a trigger; a fastener adapted to couple the trigger to a coupling point, wherein the coupling point between the fastener and the trigger can be adjusted to a desired coupling graduation; and a series of adjustments for adjusting a desired coupling range of operation for the trigger, which includes a trigger coupling adjustment, comprising a minimum and maximum coupling adjustment for controlling the lateral displacement of the trigger out of engagement with the trigger. lock, wherein the trigger coupling adjustment comprises a coupling sleeve and an adjustable coupling screw that is threadably engaged within a cylinder and wherein the coupling sleeve is permanently fixed within the trigger.

4. The trigger control according to claim 1, further characterized in that the adjustments further comprise an adjustment on the displacement, a trigger pull adjustment and a trigger lock adjustment.

5.- The control of firing in accordance with the claim 1, further characterized in that the maximum trigger coupling adjustment setting for the trigger coupling adjustment comprises between about 0.56 mm (0.022 inches) and about 0.9 mm (0.035 inches).

6.- The control of firing in accordance with the claim 5, further characterized in that the minimum trigger coupling adjustment setting for the trigger coupling setting is between about 50% and about 100% of the maximum trigger coupling adjustment setting.

7. The trigger control according to claim 1, further characterized in that the minimum coupling adjustment setting for the trigger coupling adjustment is approximately 0.3 mm.

The firing control according to claim 1, further characterized in that the sear is adapted to release a firing pin to discharge a round of ammunition when pulled on a trigger.

9. The control of firing in accordance with the claim 1, further characterized in that the adjustment of the trigger lock comprises a screw which is threadably coupled to the rear trigger arm to adjust a coupling distance setting between the trigger lock setting and the lock.

10. A firearm, characterized in that it comprises: a barrel; a trigger control mechanism including a trigger and a catch adapted to engage the trigger at a contact point; wherein the trigger control mechanism comprises a series of settings including a trigger pull adjustment, an adjustment over the travel for the trigger, and a trigger coupling adjustment comprising a preset coupling setting and a variable coupling setting to control an amount of movement between the trigger and the sear that is required to release the sear from the coupling with the trigger to fire the firearm; a striker adapted to be released by the sear for coupling a round of ammunition when the trigger is pulled; and a safe adapted to block the operation of the trigger control mechanism when it is activated.

11. The firearm according to claim 10, further characterized in that the trigger further comprises a trigger body, a front trigger arm and a rear trigger arm, which includes an adjustable trigger lock mechanism mounted on the trigger. same and adopted to attach the firearm insurance.

12. The firearm according to claim 11, further characterized in that the trigger locking mechanism comprises an adjusting screw threadably connected to the rear trigger arm.

13. The firearm according to claim 10, further characterized in that the trigger coupling engagement comprises a coupling sleeve and a coupling screw threadably engaged within a cylinder.

14. The firearm according to claim 13, further characterized in that the coupling sleeve is adjusted to a desired pre-set graduation and subsequently left permanently inside the cylinder.

15. The firearm according to claim 10, further characterized in that the pre-established coupling graduation is between approximately 0.56 mm (0.022 inches) and approximately 0.9 mm (0.035 inches).

16. The firearm according to claim 10, further characterized in that the variable coupling graduation is between approximately 50% and approximately 100% of the preset coupling graduation.

17. The firearm according to claim 16, further characterized in that the minimum value of the variable coupling graduation is approximately 0.3 mm (0.010 inches).

18. A method to graduate a fire control of a firearm, the method comprising: providing a firearm comprising: a trigger; a fastener adapted to couple the trigger to a coupling point; and a trigger coupling adjustment mechanism comprising a coupling sleeve axially movable within the trigger, and an adjustable coupling element threadably engaged within the coupling sleeve, the trigger adjusting mechanism is adapted to control the coupling of the coupling. trigger with the sear; adjusting the position of the coupling sleeve within the trigger to a first coupling graduation, wherein the first coupling graduation provides a first engagement of the trigger with the sear; and adjusting the position of the coupling element within the adjustment sleeve to a second coupling graduation, wherein the second coupling graduation provides a second engagement of the trigger with the sear.

19. - The method according to claim 18, further characterized in that adjusting the position of the coupling sleeve to the first coupling graduation comprises adjusting the position of the coupling sleeve so that the first coupling between the trigger and the sear is between approximately 0.56 mm (0.022 inches) and approximately 0.9 mm (0.035 inches).

20. The method according to claim 18, further characterized in that the adjustment of the position of the collection element to the second coupling graduation comprises adjusting in a variable manner the position of the coupling element so that the second assembly between the gatiil and the sear is between about 50% and about 100% of the first coupling between the trigger and the sear.

21. The method according to claim 20, further characterized in that the adjustment of the position of the coupling element to the second coupling graduation comprises variable adjustment of the position of the coupling element so that the second coupling between the trigger and the sear has a minimum value of approximately 0.3 mm (0.010 inches).

22. The method according to claim 18, further characterized in that the trigger further comprises a trigger body and a front trigger arm, the coupling sleeve is positioned within the front trigger arm.

23. - The method according to claim 19, further characterized in that adjusting the position of the coupling sleeve to the first coupling graduation comprises adjusting the position of the coupling sleeve so that the first coupling between the trigger and the sear is in a maximum value.

24. The method according to claim 21, further characterized in that adjusting the position of the coupling element with the second coupling graduation comprises varying the position of the coupling element so that the second coupling between the trigger and the sear is between approximately 50% and approximately 100% of the maximum value.

25. The method according to claim 18, further characterized in that it comprises fixing the adjustment sleeve inside the trigger after adjusting the position of the coupling sleeve to the first coupling graduation.