Spearfishing gun with a system for performance and ergonomics enhancement

Abstract

The invention relates to a speargun equipped with a system for improving performance and ergonomics. The essence of the invention is a system for stopping the contraction of the rubber bands on the lower side of the speargun in roller and inverted roller spearguns. The rubber bands are stopped by a stopping element positioned on the lower side of the speargun. In addition to this stopping element, the stopping of the rubber bands is also facilitated by a connecting element that links the left and right rubber bands, forming a loop that catches onto the stopping element, thereby preventing further contraction of the rubber bands. The stopping element can be implemented in a movable or fixed manner and positioned on the speargun in various ways, allowing different effects to be achieved — stopping the rubber bands at the end of the shot with full power and / or regulating the shot power. The speargun according to the invention allows quick and simple shot power regulation in both directions during the dive, as well as easier loading. Furthermore, by reducing vibrations at the end of the shot, it enhances shooting accuracy.

Description

[0001] SPEARFISHING GUN WITH A SYSTEM FOR PERFORMANCE AND ERGONOMICS ENHANCEMENT

[0002] Field of the invention

[0003] The present invention belongs to the field of weapons and fishing, more specifically in the field of weapons and equipment for underwater spearfishing. The invention relates to a speargun for underwater spearfishing, equipped with a system for improving performance and ergonomics, which comprises a stopping element for stopping the rubber bands that power the shot.

[0004] Background of the invention and the technical problem

[0005] Spearfishing is one of the oldest fishing techniques, involving the use of sharp- pointed tools such as spears, arrows, or harpoons to pierce the fish upon impact. Modem underwater spearfishing involves the use of freediving equipment and spearguns powered by rubber bands or pneumatic spearguns that use compressed gas to launch a sharp-pointed projectile.

[0006] There are three main types of rubber band-powered spearguns: the classic speargun, the roller speargun, and the inverted roller speargun. They all share the following components:

[0007] • a speargun body, made from wood, carbon fiber, or aluminum,

[0008] • a handle positioned at the rear of the speargun body,

[0009] • rubber bands, which are stretched before the shot and connected to the projectile; when released, they transfer their elastic energy to propel the projectile forward,

[0010] • a trigger mechanism that releases the projectile,

[0011] • a projectile, which can be in the form of a harpoon, spear, or arrow. The projectile is secured to the speargun body in such a way that the trigger mechanism can release it, allowing the rubber bands to propel it away from the handle.

[0012] These three types of rubber band-powered spearguns differ in how the rubber bands are attached to the speargun and how they transfer energy to the projectile during the shot.

[0013] In classic spearguns, the rubber bands are attached at the front of the speargun, while the rear ends of the rubber bands are hooked onto a notch or a metal catch at the back of the spear using a wishbone (a short connecting cord or metal wishbone). The spear is then secured in the trigger mechanism at the rear of the speargun. When the trigger is pulled, the spear is released from the mechanism, and the rubber bands propel it forward with significant acceleration. The spear is attached to the speargun by a long line that retains the fish after impact. In a classic speargun, the rubber bands accelerate the spear for approximately two-thirds of the speargun’s length until they fully contract. However, the sudden acceleration at the start generates considerable recoil, reducing shot accuracy.

[0014] In "roller" spearguns, the rubber bands extend over bearing-mounted pulleys at the front of the speargun and continue to the underside of the speargun. The rubber bands are pre-tensioned, meaning they remain slightly stretched even when the speargun is not loaded. This allows the rubber bands to accelerate the spear along the full length of the speargun, enabling it to reach higher speeds. Additionally, the bands on the underside of the speargun counteract the recoil caused by the forward propulsion of the spear, reducing kickback and improving accuracy.

[0015] In inverted roller spearguns, the rubber bands are positioned on the underside of the speargun, while only the cord passes over pulleys at the front of the speargun and hooks onto the notch at the back of the harpoon during loading. Often, a pulley system (with a ratio of 1 :2 or higher) is used to make loading easier while further minimizing recoil. Since the rubber bands remain pre-tensioned, they continue to exert force even after the shot is fired, ensuring that the harpoon accelerates along the full length of the speargun.

[0016] A common issue with all speargun types is that shot power cannot be easily adjusted while underwater. For example, if a fish is near a rock and the speargun is fully loaded, the shooter risks damaging the spear upon impact with the rock.

[0017] Both roller and inverted roller spearguns also have a significant drawback: they are difficult to load. Because the rubber bands are pre-tensioned, the driving cord (the cord that propels the projectile) tightens against the front of the speargun after firing, making it difficult to grip and reload. Loading is particularly challenging for longer spearguns, as the shooter must grasp the rubber bands or cord at the very front of the speargun and pull them back in one continuous motion, which can be difficult for many users. The easiest way to load a speargun is to brace the rear handle against the chest and use both hands for loading. However, in roller or inverted roller spearguns, the driving cord or wishbone is positioned at the very front before loading, making it difficult — if not impossible — for shorter users or those using longer (more powerful) spearguns to reach it in this position.

[0018] Another issue occurs at the end of the shot with a roller speargun. Due to the pretensioned rubber bands, the driving (wishbone) cord tightens abruptly and may pinch the rear edge of the projectile. Additionally, because the rubber bands are pretensioned, the driving cord strikes the front of the speargun while the rear of the projectile is still inside the speargun’s guide track (rail). This impact causes vibrations that negatively affect shooting accuracy.

[0019] The technical problem, addressed by the present invention, is development of a simpler mechanism for stopping the rubber bands and adjusting shot power. It is also desired that the invention facilitates easier loading and reduces vibrations during firing, thereby improving shot accuracy. Prior Art

[0020] A known solution for adjusting shot power is for the spearfisher to unhook an individual rubber band (if the speargun has multiple bands) or move it to a different notch on the spear where it is less stretched. However, this process is quite complex and time-consuming, often scaring the fish away. Alternatively, the spearfisher may choose to load the speargun with less tension when expecting fish near rocks, but this prevents them from easily increasing the power of the speargun when spotting a fish in open water, beyond the range of the lower-power setup.

[0021] A known solution for the difficulty of loading roller and inverted roller spearguns — caused by the tightening of the driving (wishbone) cord against the top of the speargun — is the use of a tool to pull the rubber bands or cord. Another approach is to add an extra connecting cord that is used exclusively for loading. Neither solution is ideal: the first requires the spearfisher to always carry an additional tool, which can be lost, while the second makes aiming more difficult and increases resistance during the shot, reducing shooting power.

[0022] A known solution for loading long roller and inverted roller spearguns is the use of an intermediate "resting" notch on the spear. The spearfisher can first load the speargun to this notch and then reposition it into a better grip before completing the loading process. However, this method is complicated, requiring a specially designed spear with an additional “resting” notch, and there is also a risk that the cord may slip off the notch during repositioning, potentially injuring the spearfisher. Another approach involves repositioning the rear of the speargun against the chest while loading, but this demands significant physical strength, making it impractical for many users.

[0023] A known solution for preventing the spear from getting pinched at the end of the shot in roller and inverted roller spearguns is the installation of guides on the front upper section of the speargun, which lift the driving (wishbone) cord away from the spear. However, as the wishbone cord in this final stage moves perpendicular to the spear’s trajectory, it may pull the notch or catch it is attached to upward, disrupting the spear’s flight path and significantly affecting shot accuracy. Additionally, when the wishbone cord strikes the guides, it causes vibrations at the frontmost part of the speargun. At this moment, the rear end of the spear is still in contact with the speargun, transferring these vibrations to the spear and further reducing accuracy.

[0024] Description of the solution to the technical problem

[0025] The invention addresses all the aforementioned issues of existing solutions, as defined in the independent claim, with preferred embodiments described in the dependent claims. The essence of the invention is a system for stopping the rubber bands on the bottom side of roller and inverted roller spearguns. The rubber bands are stopped by a stopping element mounted on a bottom side of the speargun. This is enabled by a connecting element that links the left and right rubber bands, forming a loop that catches onto the stopping element, preventing further contraction of the rubber bands.

[0026] The stopping element can be implemented as either a fixed or movable component and can be positioned on the speargun in various ways to achieve different effects — stopping the rubber bands at the end of a full-power shot and / or adjusting shot power. This system of a stopping element and a connecting element allows for the halting of rubber bands at the end of a full-power shot using a final, fixed stopping element. This prevents the rubber bands from tightening the driving cord (the cord that propels the spear) and pinching the rear edge of the spear. As a result, upper guides that would otherwise lift the driving (wishbone) cord away from the spear — which could reduce shooting accuracy — are no longer necessary. Since the driving cord does not strike the front of the speargun at the end of the shot, vibrations are reduced, thereby increasing shooting accuracy. Additionally, because the driving cord remains loose at the end of the shot, reloading is simplified, eliminating the need for special tools. A similar system can be implemented using a movable stopping element with an activated and deactivated position. In the activated position, it stops the rubber bands before they fully contract, just like the fixed stopping element. If the movable stopping element is in the deactivated position, the connecting element slides past it to the final stopping element, allowing the speargun to fire at full power. It can be positioned in such a way that, when activated, it halts the contraction of the rubber bands after they have transferred only part of their energy to the spear, thereby enabling shot power adjustment. This system can be used on both roller and inverted roller spearguns to regulate shot power and, in the case of inverted roller spearguns, to facilitate easier loading. By stopping the rubber bands during loading, the system enables a two-stage loading process.

[0027] This speargun for underwater spearfishing comprises:

[0028] • a speargun body, made of wood, carbon fiber, or aluminum,

[0029] • a handle, located at the rear of the speargun body,

[0030] • a trigger mechanism, including a trigger and left and right rubber bands, which ensure the propulsion of the spear, wherein these rubber bands may be pretensioned and either: o mounted over bearings or pulleys at the front of the speargun, running from the lower to the upper side, where they attach to a wishbone cord that hooks onto a notch or catch at the rear of the spear when the speargun is loaded (roller speargun type), or o mounted on the lower side of the speargun, with a driving cord running through pulleys at the front of the speargun, the end of which (wishbone cord) is designed to latch onto a catch or notch at the rear of the spear when loaded (inverted roller speargun type),

[0031] • a projectile, which may be in the form of a spear, shaft, or arrow, and is held within the speargun body and locked in the trigger mechanism so that upon pressing the trigger, the rubber bands propel it forward, away from the handle,

[0032] • a system for enhancing performance and ergonomics, allowing the rubber bands that propel the projectile to be stopped, wherein said system comprises: o a connecting element, designed to link the left and right rubber bands, preferably in the form of a cord or other connection for stopping the bands, such as a flexible or rigid plastic or metal component that connects the left and right rubber bands and enables their stopping before they fully contract, o a final stopping element, mounted on the lower side of the speargun body, designed to catch the connecting element at the end of a fullpower shot, stopping the contraction of the rubber bands, which prevents the wishbone cord from tightening at the top of the speargun at the end of the shot, wherein the final stopping element may be a hook or protruding component made of strong material, such as metal, carbon fiber, plastic, or similar, or it can be achieved through an appropriately shaped protrusion on the speargun body, and wherein the stopping element is positioned on the lower side of the speargun, with its exact placement adjusted based on the transmission system through pulleys and rollers, the location of the trigger mechanism, and the positioning of the notches or catches for securing the wishbone cord on the projectile, and wherein the final stopping element is positioned within the central 30% of the speargun’s length, o a stopping element for shot power regulation, which takes the form of a hook or protruding component made of strong material (such as metal, carbon fiber, or plastic), wherein in its active position, it is designed to catch the connecting element and stop the rubber bands before they fully contract at the end of the shot (reduced power shot), and wherein in its inactive (closed) position, the connecting element slides past it to the final stopping element, allowing the rubber bands to contract fully (full-power shot), and wherein the power adjustment stopping element has two positions, i.e. an active (open) and an inactive (closed) position, between which switching can be done manually (either directly or via a lever or linkage), or through a spring and a locking mechanism to control movement between the active and inactive positions.

[0033] The final stopping element prevents the driving (wishbone) cord, which propels the projectile along the top of the speargun, from tightening at the top of the speargun at the end of the shot. This eliminates the risk of the projectile’s rear end getting jammed, which could negatively affect shot accuracy. Since the wishbone cord does not strike the top of the speargun at the end of the shot, vibrations at the end of the shot are reduced, resulting in increased accuracy. Additionally, because the driving (wishbone) cord is not tightly stretched at the top of the speargun, it can be easily grasped with fingers, making reloading the rubber bands easier.

[0034] The final stopping element can also be designed to be adjustable, allowing it to be moved forward or backward along the speargun body. This adapts the system to different projectile designs, ensuring optimal performance across various setups.

[0035] The stopping element for shot power regulation prevents the rubber bands from fully contracting during a shot, thereby transferring only a portion of their energy to the projectile, resulting in a reduced-power shot. A preferred embodiment of the system is configured to allow easy switching between the two positions, either by directly moving the movable stopping element or by shifting it via a spring and trigger mechanism, facilitating simple and rapid shot power adjustment in both directions.

[0036] When the system is activated, it also enables the user to partially load the rubber bands during the loading process, as the connecting element engages with the movable stopping element while the rubber bands are being loaded. This feature significantly simplifies loading, particularly for longer spearguns, as the user can initially load the rubber bands only partially — without pressing the rear end of the speargun against the chest — before repositioning the speargun into a more favourable loading position (with the rear end against the chest) and completing the loading process.

[0037] The system for performance and ergonomics enhancement of the speargun can be implemented with either the final stopping element and the stopping element for shot power regulation together or separately (only one of them). It is possible to implement multiple stopping elements for shot power regulation, allowing for multilevel power adjustment. Additionally, the stopping element for shot power regulation can be designed as a movable component on the speargun body, enabling further customization of shot power regulation. The preferred embodiment of the system for performance and ergonomics enhancement of an inverted roller-type speargun comprises both a final stopping element and a stopping element for shot power regulation. The final stopping element is designed as a hook or an appropriately shaped section of the speargun body, capable of catching the connecting element. It is positioned to halt the rubber bands just before the driving cord (wishbone) tightens at the front of the speargun at the end of a full-power shot, typically within the central 30% of the speargun’s length, depending on the specific construction. The final stopping element can be fixed or adjustable along the longitudinal axis of the speargun, allowing fine-tuning for different projectile (spear) designs by shifting it a few centimeters forward or backward.

[0038] The stopping element for shot power regulation is preferably positioned between 30% and 60% of the distance between the front of the speargun and the final stopping element. It is implemented with a spring-loaded mechanism and a trigger latch, where pressing the trigger latch activates the system by pushing the movable stopping element upward with the spring, allowing it to catch the connecting element and stop the contraction of the rubber bands during the shot. By pressing down on the movable stopping element, it deactivates by latching onto the trigger mechanism and remains lowered, while the spring resets to a tensed state.

[0039] An alternative preferred embodiment omits the spring and trigger latch, allowing the user to manually reposition the movable stopping element between active and inactive positions using their fingers. A third preferred embodiment integrates lever- operated or extended trigger control, allowing the user to activate or deactivate the system via a lever or extension near the speargun handle, enabling easier control with one or both hands.

[0040] The preferred embodiment of the connecting element consists of a 2-8 cm long durable cord, which directly links the front ends of the left and right rubber bands, the pulleys guiding the driving cord, or is attached anywhere between these positions. The preferred embodiment of a speargun for underwater fishing featuring the system for performance and ergonomics enhancement in a roller-type speargun is designed without a final stopping element, while the stopping element for shot power regulation is positioned within the front 5% to 40% of the speargun’s length.

[0041] The invention will be described in further detail based on an exemplary embodiment of an inverted roller speargun and figures, which show:

[0042] Figure 1 Speargun for underwater fishing (inverted roller) according to the invention, loaded and ready to fire, in three projections

[0043] Figure 2a Speargun for underwater fishing (inverted roller) according to the invention, immediately after firing at full power, in three projections

[0044] Figure 2b Detail A from Figure 2a

[0045] Figure 3a Speargun for underwater fishing (inverted roller) according to the invention, immediately after firing with regulated power, in three projections

[0046] Figure 3b Details A and B from Figure 3a

[0047] Figure 4 A preferred embodiment of the stopping element for shot power regulation (activated)

[0048] Figure 5a Speargun for underwater fishing according to the invention, implemented with a classic roller speargun, in three projections.

[0049] Figure 5b Detail A from Figure 5a

[0050] The speargun comprises a speargun body 1 with a handle 6, a trigger mechanism 2 with a trigger 7, rubber bands 8, a driving cord 3, front pulleys 4, blocks 11 , a final stopping element 9, a connecting element 12, a stopping element for shot power regulation 10, and a projectile (spear) 5.

[0051] The rubber bands 8 are mounted on the underside of the speargun body and connected to the driving cord 3 via blocks 11. The driving cord 3 runs through the front pulleys 4 to the upper side of the speargun, where, during loading, it is hooked onto a notch or catch on the projectile 5.

[0052] The connecting element 12 links the rubber bands 8 on the left and right sides of the speargun. It is attached to the front edge of each rubber band behind the blocks 11 in the case of an inverted roller speargun or between the front and rear sections of the rubber bands (depicted in figure 5 and marked with reference numbers 8a, 8b) in the case of a roller speargun. It functions to stop the contraction of the rubber bands 8.

[0053] The rubber bands can be stopped either at the final stopping element 9, when they contract to their full working range and transfer all their energy to the projectile (fullpower shot), or at the stopping element for shot power regulation 10 if it is activated. In the latter case, the rubber bands do not contract to their full working range but stop earlier, transferring only part of their energy to the projectile, resulting in a reduced shot power (lower projectile velocity).

[0054] The connecting element 12 can be a strong cord, a steel cable, or a rigid or articulated connecting element made from another material (metal, plastic, carbon fiber, etc.).

[0055] The final stopping element 9 is a hook or protruding element that catches the connecting element 12 at the end of the shot, stopping the contraction of the rubber bands 8 at the end of their working range while they are still under tension. This prevents the driving cord 3 from tightening at the top of the speargun near the front pulleys 4 and jamming the projectile 5. The final stopping element 9 is made of a strong material metal, plastic, carbon fiber, etc. or is integrated into the shape of the speargun body 1 . Its position on the speargun is adjusted to catch the rubber bands 8 just before the driving cord 3 tightens at the front pulleys 4.

[0056] The shot power regulation mechanism 10 comprises a movable stopping element 10.2 — a hook or protruding component made of strong material, such as metal, carbon fiber, plastic, etc., designed to catch the connecting element 12 before the rubber bands fully contract. It has two positions: an open active position and a closed position, which the user can easily switch between. It is mounted on the underside of the speargun body 8 between the front pulleys 4 and the final stopping element 9. Its exact position depends on the desired shot power reduction.

[0057] An alternative configuration comprises two or more shot power regulation mechanisms, allowing for multi-stage shot power adjustment. Another variation allows the mechanism to be repositioned to change the degree of shot power regulation.

[0058] When the speargun is loaded and ready to fire, as shown in Figure 1 , the projectile 5 is secured at its rear end within the trigger mechanism 2. The rear part of the driving cord 3 (also called “wishbone”) is hooked onto a catch or notch at the back of the projectile. The driving cord then runs through the front pulleys 4 and is linked to the rubber bands 8, which are at maximum tension, via the blocks 11.

[0059] Upon pulling the trigger 7, the projectile is released from the trigger mechanism, allowing the rubber bands to contract and the driving cord 3 to accelerate the projectile forward. If the stopping element for shot power regulation 10 is not activated i.e., its movable stopping element 10.2 is in the closed position and does not interfere with the connecting element 12, the rubber bands will continue to contract and accelerate the projectile until the connecting element 12 comes to a stop against the final stopping element 9.

[0060] Even at the end of a full-power shot, the rubber bands may still remain under tension (pre-tensioned state). As the contraction of the rubber bands is halted, the driving cord 3 is released at this moment, allowing the projectile to be propelled forward at high velocity (shown in Figure 2).

[0061] Since the rubber bands stop at the final stopping element 9, which is typically positioned within the central 30% of the speargun’s length, the vibrations upon stopping are significantly reduced compared to conventional designs where the rubber bands stop due to the driving cord slamming into the front of the speargun. This also eliminates the risk of the driving cord interfering with the projectile’s flight by catching on the projectile’s notch or catch at the moment of release.

[0062] The final stopping element 9 may be a hook made of strong material (metal, carbon fibre, plastic, etc.), a specially shaped section of the speargun body, or any other structure capable of catching the connecting element 12 before the rubber bands fully contract.

[0063] In a reduced-power shot, the process begins the same as in a full-power shot. However, the stopping element for shot power regulation 10 is activated Figure 3, meaning its movable element 10.2 is positioned to catch the connecting element 12 earlier in the contraction process. This stops the contraction of the rubber bands 8 significantly sooner than in a full-power shot. As a result, the driving cord 3 is released, and the projectile 5 is propelled forward at a lower speed.

[0064] The stopping element for shot power regulation 10 consists of a movable hook 10.2 made of strong material (metal, carbon fiber, plastic, etc.), which functions similarly to the terminal stopping element 9 but with the ability to toggle between active and inactive states. When activated, the connecting element 12 is caught by the movable element 10.2, reducing the power of the shot. When deactivated, the connecting element 12 bypasses it and reaches the final stopping element 9, allowing a fullpower shot.

[0065] The stopping element can be activated / deactivated manually through a direct push, a lever mechanism, or a spring-loaded latch for activation / deactivation (an example is illustrated in Figure 4). In this case, the stopping mechanism consists of housing 10.1 , movable element 10.2, spring 10.3, trigger latch 10.4. The housing 10.1 is built into the speargun body, with the movable element 10.2 retracting when deactivated to avoid interfering with the contraction of rubber bands 8 and the connecting element 12. Pressing the trigger latch 10.4 causes the spring 10.3 to lift the movable element 10.2, activating the stopping mechanism. When triggered, the movable element 10.2 directly catches the connecting element 12 or redirects it into a designated slot within the housing (as illustrated in the example in Figure 4), transferring the shot’s forces to the speargun body. The mechanism deactivates when the movable element 10.2 is pushed downward and locked by the trigger latch 10.4. Other activation methods may include front-facing or side-pushing latches or similar solutions. The movable element 10.2 can also be pushed manually or via a lever, without a spring. Additionally, the trigger latch or another activation mechanism can be connected to a rear-mounted activator near the handle 6 via a rigid rod or linkage, making toggling easier, especially if placed near the trigger 2.

[0066] The stopping element for shot power regulation also assists in loading of the speargun. After firing, the rubber bands 8 remain contracted, the driving cord 3 is released, and the connecting element 12 is caught by the final stopping element 9. To reload, the projectile 5 is latched into the trigger mechanism 2 and the driving cord 3 is pulled back and hooked onto the catch or notch at the rear of the projectile.

[0067] For longer spearguns or smaller spear fisher, this can be physically challenging. If the stopping element for shot power regulation is activated during loading, the speargun can first be partially loaded, catching the connecting element 12 at the stopping element for shot power regulation 10 (Figure 2). The spear fisher can then easily reach the driving cord 3, rest the speargun butt against their chest, and comfortably complete the loading process. The fully loaded position is shown in Figure 1 .

[0068] The stopping element for shot power regulation can also be applied to classic roller spearguns (Figure 5). In this case instead of a driving cord 3 running over the pulleys 4, the rubber bands themselves loop over the (appropriately larger) pulleys. A short connecting cord (the wishbone) secures them to the notch or catch at the rear of the projectile. The rubber bands are split into an upper section 8.1 and a lower section 8.2. The lower section 8.2 is attached to the speargun body 1 usually just before the trigger 7. The connecting element 12 links both lower rubber band sections at the front, where the lower bands 8.2 attach to the upper bands 8.1. In this case, the stopping element for shot power regulation would be positioned toward the front (within front 5% - 40% of the speargun length). When activated, only the upper rubber bands 8.1 contract, while the lower bands 8.2 remain stretched, reducing shot power.

Claims

Patent claims1 . A speargun for a roller or inverted roller type for underwater fishing comprising a system for performance and ergonomics enhancement, wherein rubber bands (8) required for powering the shot are connected by a connecting element (12), and the speargun has a stopping element (9, 10) positioned on a lower side, said stopping element being adapted to engage said connecting element (12) to stop the contraction of the bands upon firing and consequently release a propulsion line (3).

2. The speargun according to claim 1 , wherein the stopping element (5, 9) is designed as movable or fixed, thereby achieving stopping of the bands (8) at the end of the shot at full power and / or power regulation of the shot.

3. The speargun according to claim 1 or 2, comprising a first, final stopping element (9) for stopping the rubber bands and / or a second stopping element (10) for regulating the shot power, wherein the second stopping element (5) has an activated and deactivated position, and in the activated position, the second stopping element is adapted to stop the bands (8) before they fully contract, while in the deactivated position, the speargun is configured for a full-power shot.

4. The speargun according to any of the preceding claims, comprising:- a body (1 ) of the speargun,- a handle (6) at the rear part of the speargun body,- a trigger mechanism with a trigger and left and right rubber bands (8) for launching the projectile, wherein the mentioned bands (8) may be pretensioned and either arranged over mounted pulleys at the front of the speargun from the lower to the upper side of the speargun, wherein they are hooked with a line or wishbone cord (3) to a hook or a notch at the rear of the projectile when the speargun is loaded, or positioned on the lower side of the speargun, wherein the line runs over pulleys on the speargun head, with thefinal part of the line adapted to latch onto a catch or notch at the rear of the projectile when the speargun is loaded,- the system for performance and ergonomics enhancement of the speargun, which enables stopping the bands that propel the projectile, wherein said system comprises: o the connecting element (12), adapted for connecting the left and right rubber bands (8), o the first, final stopping element (9), and / or o the second stopping element (10) for regulating the shot power.

5. The speargun according to any of the preceding claims, wherein the connecting element (12) is designed as a cord or a flexible or rigid plastic or metal element.

6. The speargun according to the preceding claim, wherein the connecting element (12) is a strong cord between 2 and 8 cm in length, which directly connects the front ends of the left and right rubber bands (8), or the blocks (11 ) through which the propulsion line passes, or is attached anywhere between these positions.

7. The speargun according to any of the preceding claims, wherein the final stopping element (9) is designed as a stopping hook, which is either a simple hook or a similar protruding element made from a strong material, such as metal, carbon fiber, plastic, or the like, or is formed as an appropriate shape or protrusion of the speargun body.

8. The speargun according to any of the preceding claims, wherein the final stopping element (9) is positioned within the central 30% of the speargun’s length.

9. The speargun according to any of the preceding claims, wherein the second stopping element (10) is designed in the form of a hook or a protruding element made from a strong material, such as metal, carbon fiber, plastic, or the like.

10. The speargun according to any of the preceding claims, wherein the second stopping element (10) for regulating shot power is positioned at 30%-60% of the distance between the tip of the speargun and the final stopping element (9) or within the front 5%-40% of the speargun’s length.

11. The speargun according to any of the preceding claims, wherein the second stopping element (10) has two positions, an active or open and inactive or closed position, between which it switches via a switching element that allows movement of the second stopping element between the active and inactive positions.

12. The speargun according to the preceding claim, wherein the switching element is designed as:- a spring and trigger latch, whereby pressing the trigger latch causes the spring to push the movable stopping element upwards so that it catches the connecting element and stops the contraction of the rubber bands upon firing, and pressing the element downwards causes it to latch onto the trigger latch and remain in the lower position (deactivation), with the spring resetting, or- without a spring and trigger latch, where the user simply moves the movable stopping element between the two positions with their fingers, or- with a trigger mechanism adapted for operation via a lever or extension, which may be positioned near the speargun handle, allowing the user to control it more easily with one or two hands.

13. The speargun according to any of the preceding claims, wherein multiple stopping elements (10) for regulating shot power are provided, thereby enabling multi-stage shot power regulation.

14. The speargun according to any of the preceding claims, wherein the entire stopping element (10) for regulating shot power is designed as a movable element on the speargun body, allowing shot power regulation adjustments.

15. The speargun according to any of the preceding claims, further comprising a projectile (5), which may be in the form of a harpoon, spear, or arrow, wherein the projectile is mounted to a part of the speargun body (1 ) and latched into the trigger mechanism so that upon pulling the trigger, the rubber bands (8) propel it away from the speargun handle (6).

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