A trigger resistance mechanism for firearms

Abstract

The invention relates to a simple and space-efficient trigger resistance mechanism, designed especially for firearms. This mechanism is partially housed within the trigger and is configured to alter the trigger resistance through the transverse rotation of the cam. Each rotary position of the cam induces axial movement of the spring guide, causing upward or downward displacement through partial compression or decompression of the spring inserted coaxially inside the spring guide. The guidance pin restricts the movement of the spring, resulting in varied spring resistance levels corresponding to different height positions.

Description

Field of the invention

[0001] The present invention relates to the field of firearms and, more particularly, to trigger resistance mechanisms that modify the trigger pull force.Background of the invention

[0002] In the domain of firearms, trigger resistance refers to the amount of force required to pull the trigger of a firearm and, subsequently, initiate a shot. This resistance is customizable in certain firearms to achieve varied trigger pull characteristics, allowing for adjustments to enhance smoothness or modify the trigger pull force according to specific preferences or requirements.

[0003] Typically, firearms incorporate an adjustable screw mechanism designed to regulate trigger resistance. This screw is manipulable to compress or release a spring directly affecting the trigger mechanism.

[0004] In hunting firearms, these adjustment screws are often concealed within the firearm. To modify trigger resistance, it is necessary to remove a component of the firearm to gain access to the screw. In alternative firearm designs, these adjustment screws are typically positioned in proximity to the trigger.

[0005] The drawback of these solutions is the inherent limitation of controlling the precise value of trigger resistance. Excessive loosening of the screw also poses a potential risk of it dislodging and becoming lost.

[0006] The patent US20210172693 discloses a trigger resistance mechanism comprising one class 1 lever, with one arm responsive to trigger manipulation and the other supporting a trigger resistance spring. The spring situated at the end opposite the trigger, features a bearing element engaging a cam positioned within the firearm frame in a rotatable manner. The drawback of this solution is its accessibility, where the opening for cam rotation is not easily reachable by the user, and determining the actual position of the mechanism may not be readily discernible.Summary of the invention

[0007] The present invention aims to provide a firearm with a trigger resistance mechanism that will improve the above mentioned drawbacks of the prior art. The objective of the invention is to swiftly, easily, and accurately adjust the trigger resistance, allowing an easy access and indicating clearly its actual position.

[0008] The present invention is related to a trigger resistance mechanism for a firearm comprising: a trigger; a spring guide housed at least partially inside the trigger with said spring guide mounted movable in translation along an axis; a spring coaxially positioned around at least a part of the spring guide; a cam interacting with the spring guide to transform a rotational movement of the cam into a translational movement of the spring guide along the axis, said cam being configured to be manipulated directly or indirectly by a user.

[0009] Preferably, the trigger comprises an internal part intended to be concealed within the firearm and an external part intended to be manipulated by the user.

[0010] Preferably, the trigger is able to move in an arc around a transversal pivot pin intended to be positioned between the internal part and the external part inside the firearm.

[0011] Preferably, the trigger resistance mechanism comprises a guidance pin with a through-hole receiving said part of the spring guide for guiding the spring guide along the axis.

[0012] Preferably, the spring guide comprises another part, also called head, with the spring positioned between said head and the guidance pin.

[0013] Preferably, the cam is inserted into the external part of the trigger and the spring guide is mainly positioned in the internal part of the trigger.

[0014] Preferably, the cam comprises more than one rotary position, each of said rotary positions moving the spring guide to a different height along the axis.

[0015] Preferably, the trigger resistance mechanism comprises a cam cap connected to the cam, with said cam cap featuring a drive recess intended to be manipulated by a screwdriver.

[0016] Preferably, the cam cap comprises indicative markings defining the resistance of the trigger.

[0017] Preferably, the height adjustment of the spring guide is achieved through the compression or decompression of the spring.

[0018] Preferably, each rotary position of the cam or each height of the spring guide corresponds to a distinct trigger pull force.

[0019] Preferably, the firearm comprises at least one trigger resistance mechanism.Brief description of the drawings

[0020] Figure 1 is a 3D cross-section of the general view of the trigger mechanism of the firearm. Figure 2 is a 3D general view of all the key components of the trigger mechanism resistance of the firearm. Figure 3 is a 3D general view of the trigger mechanism of the firearm. Figure 4 is a partial side view of the firearm. Figure 5 is a zoom of the side view of the trigger. Figure 6 is a zoom of the cross-section of the trigger mechanism resistance of the firearm. Figure 7 is the cross-sectional view of the 3 possible positions of the trigger mechanism resistance. Detailed description of the invention

[0021] The present invention will be described in greater detail in one or more preferred embodiments of the invention with reference to the appended figures and for which elements or details can be combined. The same principle applies when combining elements from the figures which illustrate the principal component of the current invention.

[0022] Figure 1 illustrates a cross-sectional overview of the trigger resistance setting mechanism 10 employed in one type of firearm. In this embodiment, the trigger resistance mechanism 10 comprises one trigger 1 though alternative embodiments may feature more than one trigger 1. The trigger 1 is composed of an internal part 11 concealed within the firearm and an external part 12 protruding from the firearm frame, visible to the user for manipulation and activation of the shooting action. Essentially, the internal part 11 is the concealed segment not visible to the user, while the external part 12 constitutes the exposed portion of the trigger 1. In between the internal part 11 and the external part 12, a pivot pin 2 may be positioned, allowing the movement of the trigger when actuated in an arc around its axis. Preferably, the pin 2 is located inside the firearm, hidden in the frame of the firearm.

[0023] Figure 1 further illustrates a vertically installed spring guide 5. Preferably, the spring guide 5 is at least partially embedded within the trigger 1, more preferably at least partially inserted within the internal part 11 of the trigger 1. In other words, and for aesthetic purposes, it is preferable that the spring guide 5 is concealed within the frame of the firearm and / or the trigger 1, making it invisible to the user.

[0024] According to another embodiment, the spring guide 5 may be fully embedded into either the internal part 11 or the external part 12 of the trigger 1. Alternatively, it may be partially embedded within the internal part 11 and partially within the external part 12. Preferably, the spring guide 5 remains concealed within the frame of the firearm, ensuring it is not externally exposed to prevent any external factors or elements from obstructing or hindering its functionality.

[0025] In the present embodiment, the spring guide 5 comprises a first part shaped like a rod 8 and a second part functioning as a head 7 of the spring guide 5, with a diameter larger than that of the rod 8 of the first part. This second part is oriented downward in the direction of the trigger 1. Preferably, the spring guide 5, or at least a portion thereof, is housed inside a chamber or hallow space within the trigger 1, specifically inside the internal part 11 of the trigger 1.

[0026] In Figure 1, the spring guide 5 is guided by a guidance pin 6 positioned within the firearm frame, which may permit a potential degree of rotational freedom. Preferably, the rod 8 of the spring guide 5 is inserted into the guidance pin 6 via a through-hole 15 (clearly shown in figure 2), allowing only a singular degree of freedom of the spring guide 5, specifically its vertical axial displacement. A spring 4 may be placed coaxially inside the spring guide 5 around the rod 8 between the head 7 of the spring guide 5 and the guidance pin 6, enabling compression when the spring guide 5 moves upward and partial decompression during downward movement. The motion of the spring guide 5 is controlled by the cam 3 situated within the trigger 1. In more detail, the cam 3 may interact with the head 7 of the spring guide 5 such that when the user transversely rotates the cam 3, the spring guide 5 is permitted to move vertically. Preferably, the cam 3 may have at least two rotational positions corresponding to two distinct vertical heights of the spring guide 5, resulting in two different spring resistances.

[0027] According to another embodiment, the engagement or guidance of the spring guide 5 with the guidance pin 6 may be substituted with a bushing that partially or entirely surrounds the spring guide 5. This replacement may be implemented to enhance guidance, prevent potential blockages, or reduce friction and wear, thereby optimizing the functioning of the spring guide 5.

[0028] Figure 2 illustrates a general view of the essential elements of the trigger mechanism resistance of a firearm. The cam 3 may be linked and concealed by a cam cap 9. Preferably, the cam cap 9 features a flat surface with a height that does not surpass the overall thickness of the trigger 1 or, at a minimum, does not exceed the width of the opening in the firearm frame designated for the trigger insertion.

[0029] The cam cap 9 may be customized to suit various screw opening types by incorporating a compatible drive recess design. This drive recess may be specifically configured to accommodate the corresponding tool for manipulating the cam 3. Consequently, this rotation alters the resistance of the spring 4 by adjusting the vertical height of the spring guide 5.

[0030] In the present embodiment, the drive recess is hexagonal, designed for manipulation by tools such as a hex key or Allen wrench, a T-handle hex drive, a hex socket driver, a hex hole L type wrench, or any other specialized tools capable of safely and conveniently rotating the cam cap 9 and consequently the cam 3. Importantly, the transversely positioned cam cap 9 ensures easy visibility, access, and manipulation by the user, free from any geometric constraints that may be imposed by the trigger guard 1.

[0031] According to another embodiment, the cam cap 9 and / or the cam 3 may be manipulated using a component of the firearm that may be detached, eliminating the need for any additional tools to adjust the trigger resistance mechanism 10. In way of example and without any limitation, the bolt handle of the firearm may have a detachable part with a tip, end, or edge shaped to match the recess of the cam cap 9 or be able to grab the cam cap 9 and / or the cam 3. This design may allow the user, when needing to modify the trigger resistance mechanism 10, to utilize the detachable part to either decrease or increase the trigger resistance. Other components of the bolt or the firearm in general may also serve the same purpose.

[0032] It is worth mentioning that the cam cap 9 or the cam 3 may comprise indicative terms, symbols, marks, or numbers, each corresponding to a specific trigger resistance level. Additionally, reference signs or indicators may be incorporated into the trigger 1, allowing the user to align the indication on the cam 3 or the cam cap 9 with the reference sign or indicators on the trigger 1 to select the desired trigger resistance. Preferably, the trigger resistance mechanism 10 may comprise a minimum of two resistance levels, or, more preferably, at least three resistance levels. In the context of hunting activities, users may opt for distinct trigger resistances tailored to the type of hunting. For example, one level of trigger resistance for still or ambush hunting, another level of trigger resistance for stalking or spot-and-stalk hunting, and a different level of trigger resistance for precision target shooting. Each level of trigger resistance may comply with the unique characteristics and challenges of each activity for optimal performance.

[0033] Figure 3 illustrates a general view of the trigger mechanism of a firearm. It is clear that a substantial portion of the trigger resistance mechanism 10 may be concealed within the firearm frame or, preferably, within the trigger housing 14. Specifically, the cam 3 or the cam cap 9 may be positioned transversally for direct user access, ensuring effortless control and clarity regarding the current trigger resistance. This design may offer the added benefit of shielding the primary mechanism within the firearm frame or the trigger housing 14, reducing the risk of blockages or external inclusions that might disrupt the optimal functionality of the trigger resistance mechanism 10.

[0034] Figure 4 shows an enlarged view of the firearm 20 comprising the trigger resistance mechanism 10. Only the externally positioned trigger 1 and the cam cap 9, are visible and accessible to the user. The position of the cam cap 9 is easily identifiable by its indicative markings. The resistance of the trigger 1 may be adjusted by manipulating the cam cap 9, which features a drive recess. Access to the cam cap 9, connected to the cam 3, is ensured by using a screwdriver from the transversal side of the firearm 20.

[0035] The cam cap 9 may be placed on either the left or right side of the firearm 20. However, it is preferable for the cam cap 9 to be present on both sides, allowing for manipulation from either side based on the user's preference or the condition of manipulation.

[0036] Figure 5 depicts a partial side view of the trigger 1 of the firearm. Access to the main component that controls the trigger resistance mechanism, which is the cam cap 9 connected to the cam 3, is from either the left or right side of the firearm. The design ensures that the user may adjust the cam cap 9 to the desired position without distraction, as the trigger guard 13 does not hinder the insertion of the dedicated screwdriver for rotation or manipulation of the cam cap 9.

[0037] In the present embodiment, Figure 5 displays three distinct positions of the cam cap 9 labeled with corresponding numbers. Each position enables axial displacement (either upward or downward) of the spring guide 5, achieved through the compression or decompression of the coaxially inserted spring 4 within the spring guide 5. This axial displacement of the spring guide 5 imparts distinct spring resistances at different height positions. The resistance of the spring 4 corresponds to specific resistances of the trigger 1. To facilitate the user in recognizing the current trigger resistance, the trigger 1 may feature a reference sign indicating the exact position of the cam cap 9 and / or the cam 3 when it aligns with the engraving or symbol on the cam cap 9.

[0038] The degree of trigger resistance in trigger 1 pertains to the force or pressure required by the user to pull the trigger and discharge the firearm to suit diverse purposes and user preferences. A high degree of resistance may improve safety by preventing accidental discharges, whereas a lower degree of resistance may allow for quicker and more accurate shooting when needed.

[0039] Figure 6 shows a close-up view of the cross-section of the trigger mechanism resistance of the firearm 20. It is clear that the trigger resistance mechanism 10 is predominantly housed within the trigger 1, specifically within the internal part 11 of the trigger 1. This configuration offers advantages in terms of simplicity, minimal parts, space efficiency, and robustness.

[0040] The present resistance value of the trigger 1 may be easily verified at any time by visually inspecting the cam cap 9 on either side of the firearm. This verification may be achieved without the necessity to flip the firearm or open, move, or remove any parts that may jeopardize the safety of the user and / or their surroundings. The alignment of the indications on the cam cap 9 with those on the trigger 1 clearly conveys the chosen resistance value or position.

[0041] According to another embodiment, when the firearm is equipped with more than one trigger 1, each trigger may be outfitted with a trigger resistance mechanism 10. Alternatively, a singular trigger resistance mechanism 10 may be employed for more than one trigger 1.

[0042] According to another embodiment, when the firearm is designed with dual triggers 1, each trigger 1 may be fitted with an individual trigger resistance mechanism 10. This embodiment may include two juxtaposed spring guides 5, one on the left side and one on the right side, with the option of either sharing a common guidance pin 6 or having dedicated guidance pins 6 for each. Each spring guide 5 is equipped with a spring 4 and engaged with a cam 3, both of which can be manipulated from the respective sides.

[0043] The trigger resistance in trigger 1 is determined by the compression or partial decompression of the spring 4 positioned between the head 7 of the spring guide 5 and the guidance pin 6. The trigger resistance is dependent on the resistance of the spring 4, which is determined by the height position of the spring guide 5.

[0044] Figure 7 illustrates the cross-sectional views of the 3 possible positions of the trigger mechanism resistance. In Figure 7a, the spring 4 is depicted in its fully compressed state, which increases the trigger pulling force. This means that the force or pressure required to manipulate the trigger and discharge the firearm 20 is at its highest when the spring 4 is fully compressed. Conversely, Figure 7b shows the spring 4 in its most decompressed state, resulting in a reduced trigger pulling force, thereby allowing for a smoother and easier trigger pull. Figure 7c shows the cam 3 compressing the spring 4 to an intermediate level between its maximum compression and maximum decompression, yielding a moderate trigger pulling force. Additionally, it is noted that more than 3 levels of spring 4 compression and decompression can be achieved by altering the geometry of the cam 3.

[0045] The required force to pull the trigger 1 may significantly impact shooting performance. A lighter trigger pull can enhance accuracy, particularly in precision shooting, by requiring less force and minimizing the chance of disturbing the aim. Conversely, a heavier trigger pull may be preferred in tactical situations to prevent accidental discharges. The trigger resistance mechanism 10 of the present invention allows users to select the appropriate trigger pull force to match their performance and shooting style. This feature may enhance versatility and comfort across different shooting scenarios. Additionally, the position of the cam cap 9 controlling the trigger resistance mechanism 10 provides easy access and recognition of the selected setting.

[0046] According to another embodiment, the cam 3 may feature multiple recesses of varying depths instead of a continuously changing working surface. These recesses may be designed to seamlessly interact with the head 7 of the spring guide 5, delivering precise and accurate trigger resistance. This design may offer a distinct advantage by providing guidance along with a noticeable click for the user when the head 7 of the spring guide 5 engages with a recess, thereby notifying the user that the trigger 1 has reached the intended resistance level.

[0047] A skilled person in the art will find it obvious that the object of the invention can be realized through alternative embodiments beyond those explicitly described and shown in the accompanying drawings.

Claims

1. A trigger resistance mechanism (10) for a firearm (20) comprising: - a trigger (1); - a spring guide (5) housed at least partially inside the trigger (1) with said spring guide (5) mounted movable in translation along an axis; - a spring (4) coaxially positioned around at least a part of the spring guide (5); - a cam (3) interacting with the spring guide (5) to transform a rotational movement of the cam (3) into a translational movement of the spring guide (5) along the axis, said cam (3) being configured to be manipulated directly or indirectly by a user.

2. The trigger resistance mechanism (10) for the firearm (20) according to claim 1, wherein the trigger (1) comprises an internal part (11) intended to be concealed within the firearm (20) and an external part (12) intended to be manipulated by the user.

3. The trigger resistance mechanism (10) for the firearm (20) according to claims 1 or 2, wherein the trigger (1) is able to move in an arc around a transversal pivot pin (2) intended to be positioned between the internal part (11) and the external part (12) inside the firearm (20).

4. The trigger resistance mechanism (10) for the firearm (20) according to any one of the preceding claims, wherein the trigger resistance mechanism (10) comprises a guidance pin (6) with a through-hole (15) receiving said part of the spring guide (5) for guiding the spring guide (5) along the axis.

5. The trigger resistance mechanism (10) for the firearm (20) according to claim 4, wherein the spring guide (5) comprises another part, also called head (7), with the spring (4) positioned between said head (7) and the guidance pin (6).

6. The trigger resistance mechanism (10) for the firearm (20) according to any one of the claims 2 to 5, wherein the cam (3) is inserted into the external part (11) of the trigger (1) and wherein the spring guide (5) is mainly positioned in the internal part (11) of the trigger (1).

7. The trigger resistance mechanism (10) for the firearm (20) according to any one of the preceding claims, wherein the cam (3) comprises more than one rotary position, each of said rotary position moving the spring guide (5) to a different height along the axis.

8. The trigger resistance mechanism (10) for the firearm (20) according to any one of the preceding claims, wherein the trigger resistance mechanism (10) comprises a cam cap (9) connected to the cam (3), with said cam cap (9) featuring a drive recess intended to be manipulated by a screwdriver.

9. The trigger resistance mechanism (10) for the firearm (20) according to claim 8, wherein the cam cap (9) comprises indicative markings defining the resistance of the trigger (1).

10. The trigger resistance mechanism (10) for the firearm (20) according to any one of the preceding claims, wherein the height adjustment of the spring guide (5) is achieved through the compression or decompression of the spring (4).

11. The trigger resistance mechanism (10) for the firearm (20) according to any one of claims 7 to 10, wherein each rotary position of the cam (3) or each height of the spring guide (5) corresponds to a distinct trigger pull force.

12. A firearm (20) comprising at least one trigger resistance mechanism (10) according to any one of the preceding claims.

13. The firearm (20) according to claim 12 comprising a frame, wherein any component or part of any component concealed within said frame is considered as internal and any component or part of any component outside said frame is considered as external.

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