WO2018000064A1

WO2018000064A1 - Firing mechanism for air rifle

Info

Publication number: WO2018000064A1
Application number: PCT/BR2017/050163
Authority: WO
Inventors: George Herbert HESPANHOL
Original assignee: Hespanhol George Herbert
Priority date: 2016-06-28
Filing date: 2017-06-26
Publication date: 2018-01-04
Also published as: BR102016015147A2

Abstract

A firing mechanism for an air rifle, of the type comprising two independent stages and dry-firing capability, comprises a case (16), a latch (1) with a cavity (1B) that houses a retractable tooth (2), an intermediate lever (10) kinetically connected to a trigger (8) and arranged between a second retainer (12) and the trigger, a first retainer (4) with two lateral projections (4B), and a cocking lever (6) which, when actuated by the shooter's finger, acts upon the first retainer (4) to cock the mechanism.

Description

AIR CARBIN SHOOTING MECHANISM

[1] The present invention relates to an air rifle firing mechanism of the type having two independent stages, dry firing capability and comprising a trigger kinetically connected to an intermediate lever, a bolt with a hole which partially houses a retractable tooth, a spring acting on said tooth, a first retainer having two side projections, a second retainer and a cocking lever which, actuated by the shooter's finger, acts on the first retainer to engage said mechanism for Dry firing.

TECHNICAL STATE

[2] Air guns are based on the use of compressed air or gas to propel the projectile. In the case of spring-loaded air rifles, compressed air is produced by a rapidly moving piston by the action of a propelling spring.

[3] Patents WO2010061010 "SPORTS RIM GUN", WO2012007616 "SPRING DRIVES" and WO2013104810 "SPORTS RIM" trigger mechanisms for spring-loaded air rifles.

[4] The spring-loaded air rifle firing mechanism has the basic functions of holding the rear piston and releasing the piston to move forward driven by the propelling spring. However, a well-designed firing mechanism gives the shooter easier control over the force applied to the trigger, which results in better performance.

[5] Triggering in this context means positioning the moving parts of the firing mechanism so that said mechanism can retain the rear piston. Unhooking means undoing this positioning to allow release of the plunger. To disengage it is necessary to depress the trigger of the trigger mechanism. [6] The normal mode of cocking for spring-loaded air rifles requires the shooter to push the piston to the rear, which causes the propeller spring to compress. When triggering in the normal mode, the piston, by the action of the firing mechanism, remains retained at the rear compressing the drive spring.

[7] Commercially available spring-loaded air rifles are triggered by normal mode only. It is not possible to disengage these carbines without producing a kickback, as the piston always remains at the rear when they are triggered. The recoil is due to the abrupt distension of the drive spring as the piston is released.

[8] Firing in this context means unleashing the firing mechanism and thereby giving the projectile a boost. Therefore, a normal firing assumes the use of ammunition and the presence of retreat.

[9] In order to improve the technical fundamentals of shooting, shooters practice a training method called dry firing. Dry firing means unleashing a known weapon without ammunition, but applying all the technical fundamentals that would be applied in a normal firing. Therefore, in dry firing there is no use of ammunition and no retreat.

[10] In dry firing, the absence of setback gives the shooter better conditions to observe whether the technical fundamentals of the shot were performed with correctness. In addition, dry firing enables training where it is unsafe or not allowed to use ammunition.

[1 1] Considering that commercially available spring-loaded air rifles always produce setbacks when they are triggered and dry firing is associated with the absence of setback, it is reasonable to state that it is not possible to dry-fire these rifles.

BRIEF DESCRIPTION OF THE INVENTION

The present invention is a firing mechanism, suitable for spring-loaded air rifles, which has two independent stages and is capable of for dry shooting.

[12] When compared to commercially available models, the present firing mechanism innovates by the ability of dry firing. With this, the shooter can improve his skills with economy and safety, since there is no use of ammunition, and discretion, because there is no relevant noise generation.

[13] To trigger the firing mechanism for the purpose of dry firing, the shooter must press with the finger the trigger lever, which is disposed in front of the trigger. Thus, there is no compression of the drive spring and retention of the piston, as it has not been pushed to the rear, which ensures the absence of kickback due to firing. The proximity between the trigger and the trigger lever allows the shooter to trigger said mechanism with minimal effort and without undoing the firing position.

[14] To shoot dry the shooter must press the trigger in the same manner as a normal shot. The end of the dry firing is clearly noticeable by the shooter, as the shock of the first side's side locks rests against the cocking lever fork causes slight vibration and noise, typical of a dry firing. When the pressure on the trigger ceases, the triggering mechanism returns to the rest position.

[15] In order to allow the shooter to engage in the normal mode while the firing mechanism is already cocked for a dry firing, the retractable tine, which is responsible for holding the rear piston, retracts.

[16] When compared to commercially available models, the present firing mechanism also innovates by having two independent stages with two settings each. The arrangement of an intermediate lever between the trigger and the second detent allows for independence between stages. These features make it easier for the shooter to control the force applied to the trigger and greater flexibility to adapt said mechanism to its technical individuality.

BRIEF DESCRIPTION OF DRAWINGS

[17] The drawings shown represent the preferred and non-limiting embodiment of the present invention. Therefore:

Figure 1 is an exploded view of the present invention;

Figure 2 is a side view of the unhooked firing mechanism with the moving parts in the rest position and secured to the rear portion of the carbine tube. The carbine tube, the tongue, the second retainer, the trigger and the mechanism housing are cut;

Figure 3 is a side view of the firing mechanism and illustrates the actuation of the trigger lever for dry firing. The mechanism housing is in cut;

Figure 4 is a side view of the triggered trigger mechanism. The mechanism housing is in cut;

Figure 5 is a side view of the firing mechanism and illustrates dry firing. The mechanism housing is in cut;

Figure 6 is a side view of the triggering mechanism and illustrates the normal mode of triggering said triggering mechanism. The mechanism housing is in cut;

Figure 7 is a side view of the triggered trigger mechanism and illustrates the rearwardly held piston by said mechanism. The mechanism housing is in cut;

Figure 8 is a side view of the firing mechanism and illustrates normal firing. The mechanism housing is in cut; and

Figure 9 is a side view of the trigger mechanism and illustrates the normal mode of triggering said mechanism being triggered. The tongue and housing of the mechanism are in cut. PREFERENTIAL WAY OF CARRYING OUT THE INVENTION

[18] According to the accompanying drawings, Figure 1 is an exploded view of the firing mechanism comprising the tongue (1) with its axis (1 A) and its hole (1 B), the retractable tooth (2) ), the retractable tooth spring (3) with its retaining screw (3A), the first retainer (4) with its shaft (4A) and its side shoulder (4B), the first spring retains (5), the lever (6) with its shaft (6A) and its yoke (6B), the spring of the trigger lever (7) with its set screw (7A), the trigger (8) with its shaft (8A), the screw (9), the intermediate lever (10) with its shaft (10A), the intermediate lever spring (11), the second retains (12) with its shaft (12A) and its spring (15), the first screw (13), the second screw (14) and the housing (16).

[19] The triggering mechanism in uncoupled condition with the moving parts in the rest position is shown in Figure 2. In the rest position, the tongue (1) remains in contact with the carbine tube (17) as the spring action of the first retainer (5) and the intermediate lever spring (11) induces a counterclockwise rotation of said tongue about its axis (1A). The retractable tooth spring (3) acts on the underside of the retractable tooth (2) to hold said retractable tooth in the raised position. The intermediate lever (10) is kinetically connected to the trigger (8) via the trigger bolt (9). The intermediate lever spring (11) causes the intermediate lever (10) to rotate clockwise about its axis (10A) and, accordingly, said lever induces a trigger (8) counterclockwise rotation around its axis (8A), however, this rotation is limited by the housing (16). The spring of the second retainer (15) induces a rotation of the second retainer (12) counterclockwise about its axis (12A), but the first retainer (4), being in the rest position, prevents this rotation. . The first retainer (4) is disposed between the fork arms (6B) and has two identical side shoulders (4B), on opposite sides and aligned with each other. The spring of the first retainer (5) induces a rotation of the first retainer (4) clockwise about its axis (4A), but this rotation is limited by the action of the fork lever (6B) of the cocking lever (6). on the side shoulders (4B) of said retains. The spring of the cocking lever (7) induces a rotation of the cocking lever (6) counterclockwise about its axis (6A), but this rotation is limited by the housing (16). The spring of the trigger lever (7) is fixed to the housing (16) by means of its locking screw (7A). The housing (16) contains the moving parts of said mechanism and is fixed to the rear portion of the carbine tube (17) by the welding process. Figure 2 also illustrates the rear portion of the drive spring (19) and the tube cap (18).

[20] The cocking lever (6) is a first class lever whose fulcrum is its axis (6A). The force arm 6C and the resistance arm 6D of said lever are shown in Figure 4.

[21] The triggering of the triggering lever (6) of the triggering mechanism for the purpose of triggering said triggering mechanism for dry firing can be visualized with the aid of Figure 3. The shooter, by pressing the force arm (6C) ) of the locking lever (6) causes said lever to rotate clockwise and, as a result, the fork (6B) contacts the side shoulders (4B) of the first retainer (4) and induces a rotation in said retainer counterclockwise. The first retainer (4), when turning counterclockwise, releases the second retainer (12), which performs a counterclockwise rotation by the action of its spring (15). The rotation of the second retainer (12) ceases when said retainer contacts the first screw (13), which causes the second retainer (12) to remain in the retention position. When the shooter releases the trigger lever (6), said lever returns to the rest position by its spring (7), and the first retainer (4) by its spring (5) rotates clockwise. until it is held by the second holds (12).

[22] The trigger mechanism in dry-triggered condition is shown in Figure 4. In this condition, the second retainer (12), being in a retention position, prevents the first retainer (4) from turning to its resting position. The first holds (4) when held by the second retainer (12) characterizes the triggering condition of the triggering mechanism.

[23] The dry shot can be viewed with the aid of Figure 5. From the start to the end of the shot the shooter must pass two stages. The beginning of the first is when the shooter begins to press the trigger (8). The trigger (8), when pressed by the sniper finger, rotates clockwise and induces a rotation of the intermediate lever (10) counterclockwise, because said trigger is kinetically connected to said lever by the trigger bolt. (9). For the trigger (8) / intermediate lever (10) assembly to rotate, the force applied to said trigger must exceed the resistance imposed by the intermediate lever spring (11). The intermediate lever (10) rotates counterclockwise until its front end touches the second retainer (12), which is perceived by the shooter and characterizes the end of the first stage and the beginning of the second stage, and from this point the The force to be applied to the trigger (8) must increase, as it will also have to overcome the resistance imposed by the spring of the second retainer (15). By continuing to rotate the trigger (8), the intermediate lever (10) induces a rotation in the second retainer (12) clockwise. The second retainer (12), when rotating clockwise, undoes its retention position and releases the first retainer (4) to rotate clockwise. The rotation of the first retainer (4) is interrupted when its side shoulders (4B) hit the yoke (6B) of the cocking lever (6). This shock, by producing slight vibration and sound, signals to the shooter the end of the shot, and with this the pressure on the trigger (8) can be interrupted. When pressure is released on the trigger (8), the moving parts of the trigger mechanism return to the rest position.

[24] The trigger mechanism settings are illustrated in Figure 4. The first stage of the trigger mechanism has the trigger swing dimension adjustment (8) through the trigger screw (9), and the force adjustment to be applied to said trigger to cause it to be rotated by replacing the intermediate lever spring (11). The lever spring The intermediate gear (11) can be replaced without disassembly of the trip mechanism as it is directly accessed from the rear of the housing (16). The second stage has the adjustment of the trigger rotation dimension by means of the first screw (13), and the adjustment of the force to be applied to the trigger (8) to cause the rotation of the second retainer (12) by means of the second one. screw (14). The second screw (14) acts on the spring of the second retainer (15). The arrangement of the intermediate lever (10) between the trigger (8) and the second retainer (12), and the kinetic connection only between said trigger and said lever allow the first and second stage settings to be independent. The intermediate lever spring (11) is responsible for maintaining this connection.

[25] Normal trigger mode, with the trigger mechanism in the unlatch condition, can be viewed by means of Figure 6. Normal trigger mode requires the shooter to use a large lever to minimize the force required to push the piston. (22) to the rear, as this operation causes the compression of the driving spring (19). This large lever, which may be the carbine barrel, is kinetically connected to a rod (20) which has an impeller block (21) at its rear end. The rearward movement of the rod (20) is transmitted to the piston (22) by the action of the pusher block (21) on the pusher ring (22A) of said piston. In the rearward movement of the piston (22), before the impeller block (21) reaches the first retainer (4), the retaining ring (22B) of said piston reaches the retractable tooth (2) and induces a rotation in the pawl assembly. (1) / retractable tooth (2) clockwise around the tongue axis (1 A). This rotation frees the passage of the piston (22) to the rear and is possible because the triggering mechanism is still in the derailed condition. Just after the retaining ring (22B) passes the retractable tooth (2), the tongue (1) / retractable tooth (2) assembly rotates counterclockwise by the action of the first retainer spring (5) and the lever spring intermediate (11), and said tongue returns to its resting position. Then the block impeller (21) hits the first retainer (4) and induces a counter-clockwise rotation of said retainer. The first retainer (4), by turning counterclockwise, releases the rotation of the second retainer (12) to its retention position. The rearward movement of the rod (20) / pusher block (21) / plunger (22) assembly ceases when the pusher block (21) reaches the housing (16). After the pusher block (21) reaches the casing (16), the shooter reverses the movement of the large lever, which causes the rod (20) / pusher block (21) assembly to reverse the direction of travel. The first retainer (4), following the reverse movement of the impeller block (21) and by the action of its spring (5), rotates clockwise, but is retained by the second retainer (12), which makes the first retainer (4) remain in retention position and characterize triggering condition of trigger mechanism. In this condition, the first retainer (4) prevents the rotation of the tongue (1) clockwise. The piston (22) driven by the drive spring (19) initiates a forward movement as it follows the movement of the stem (20) / impeller block assembly (21), but the retractable tooth (2) acts on the retaining ring (22B). ) and holds said piston at the rear as the triggering mechanism is already cocked.

[26] The triggered firing mechanism and the rearwardly retained piston (22) are shown in Figure 7. In this situation, the drive spring (19) exerts a forward force on the piston (22) and therefore the ring The retainer (22B) exerts a forward force on the retractable tooth (2) and induces a clockwise rotation of the tongue (1) / retractable tooth (2) assembly about the tongue (1A) axis. However, as the firing mechanism is cocked, the first retainer (4) prevents the rotation of the tongue (1), and thus the piston (22) remains retained.

[27] Normal firing can be visualized with the aid of Figure 8. Considering what has already been presented regarding the operation of the dry firing trigger mechanism, at the end of the second stage the second retainer (12) releases the first retainer (4) to rotate. From this point, in normal firing the first retainer (4) rotates clockwise by its spring (5), and no longer retains the tongue (1). The pawl (1) / retractable tooth (2) assembly, by means of the retaining ring (22B) on said tooth, rotates clockwise and releases the piston (22) to move forward.

[28] The retractability of the retractable tine (2) allows the shooter to engage in normal mode with the trigger mechanism already triggered for a dry trigger, and this is illustrated in Figure 9. This retraction occurs only when the trigger mechanism is in the cocked condition and the plunger (22) is pushed to the rear, as in this condition the first retainer (4) prevents the rotation of the tongue (1) / retractable tooth (2) assembly clockwise. Thus, the retaining ring 22B upon reaching the retractable tooth 2 induces downward movement in said tooth. Immediately after the retaining ring (22B) overtakes the retractable tooth (2), said tooth, by its spring (3), returns to the raised position and is able to retain the piston (22) at the rear, as the mechanism is already triggered. The retractable tooth spring (3) is fixed to the tongue (1) by means of its retaining screw (3A).

Claims

1. AIR carbine firing mechanism, of a type comprising a tongue (1), a first retainer (4) disposed between said tongue and a second retainer (12), a spring of the first retainer (5), a spring of the second retainer (15), a trigger (8), a trigger screw (9), a first screw (13), a second screw (14), a housing (16), characterized in that it comprises:

- a cocking lever (6) disposed in front of the trigger (8) whose force arm (6C) is accessible to the shooter and whose resistance arm (6D) acts on the first retainer (4);

- a spring of the locking lever (7), fixed to the housing (16) by means of its fixing screw (7A), which acts on the locking lever (6);

a retractable tooth (2) housed in the hole (1 B) of the tongue (1) acting on the retaining ring (22B) of the piston (22);

- a retractable tooth spring (3) fixed to the tongue (1) by means of its retaining screw (3A) acting on the retractable tooth (2);

an intermediate lever (10) disposed between the trigger (8) and the second retainer (12) acting on said retainer and is kinetically connected to said trigger only; and

- an intermediate lever spring (11) fixed to the tongue (1) and the intermediate lever (10) acting simultaneously on said tongue and said lever.

Mechanism according to Claim 1, characterized in that the first retainer (4) has two side shoulders (4B).

Mechanism according to Claim 1, characterized in that the locking lever (6) has a fork (6B) in the resistance arm (6D).

Mechanism according to Claim 1, characterized in that the tongue (1) has a hole (1 B) housing the retractable tooth (2).