Multi-head spear gun

Abstract

The invention discloses a multi-head spear gun, comprising a spear dart body and a spear body, wherein the spear dart body comprises a dart body (1) with a cylindrical shape, the front end of which is provided with a main dart spine (11), 4 to 8 auxiliary dart spines (13) are arranged on the periphery of the main dart spine (11), a small spring (11) is installed at a hollow structure (28) inside the front side of the main dart spine (11), the right end of the small spring (11) is against the cylindrical body (9), the front end of the main dart spine (11) is provided with an adjusting device (16), and a push rod (2) is inserted into the main dart spine (11). After passing through the center hole of the snap ring (4) and the positioning body (15), it is connected with the cylinder (9); the gun body comprises a gun barrel (20), a movable handle (21), a first slide groove (22), a second slide groove (23), a sighting mirror (24), a fishing reel (25), an energy storage spring (26), a buttstock (27), a firing device (29), a trigger (30), a safety plug (31), a reset handle (32), and an elastic clip (19), and the multi-head spear gun greatly improves the shooting fish hit rate.

Description

Technical Field

[0001] The invention relates to a fishing device, in particular to a multi-head spear gun. Background Art

[0002] As people's living standards improve, they often go outdoors to find some activities to relieve stress, breathe fresh air, and exercise. Fishing outdoors in a similar way to shooting is one of them. Current outdoor fishing equipment is generally powered by springs or rubber bands. However, existing spear guns have the following major defects:

[0003] 1. The darts used in spear guns are all single darts. If there is a slight error when shooting, the target cannot be hit, that is, the success rate of shooting fish is extremely low;

[0004] 2. The harpoon is not stable enough and is prone to slipping, which affects the safety of use;

[0005] 3. Spear guns that rely on a traditionally designed rubber band structure as a charging mechanism have insufficient charging energy, which greatly limits the range and accuracy of the spear dart. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-head spear gun to solve the problems described in the background technology, that is, to provide a multi-head spear gun with sufficient potential energy, safety and stability, and to greatly improve the hit rate of spearing fish.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] Multi-head spear guns, such as Figure 1 , Figure 2 , Figure 6 , Figure 7 As shown, it includes a dart body and a gun body.

[0009] The fish dart body comprises a cylindrical dart body 1, a main dart spine 11 is arranged at the front end of the dart body 1, 4 to 8 auxiliary dart spines 13 are arranged on the periphery of the main dart spine 11, and barbs 12 are arranged on the main dart spine 11 and the auxiliary dart spines 13.

[0010] The front end of the cylindrical shape of the dart body 1 is provided with an annular groove 33, and the rear part is provided with a positioning ring 8. The rear end of the positioning ring 8 is provided with a fishing line hole 5 at a reduced diameter portion, and the end is provided with a notch 6.

[0011] The interior of the dart body is a cylindrical hollow structure 28 , a small spring 10 is installed at the hollow structure 28 inside the front side of the main dart 11 , the right end of the small spring 10 is against the cylinder 9 , and an adjustment device 16 is provided at the front end of the main dart 11 .

[0012] A positioning body 15 is embedded in the middle of the cylindrical hollow structure 28 of the dart body, and a snap ring 4 is embedded near the tail of the dart body 1. A safety socket 3 is provided at the left end of the snap ring 4. After the push rod 2 passes through the snap ring 4 and the center hole of the positioning body 15, it is connected to the cylinder 9.

[0013] The cylinder 9 and the inner cylindrical surface of the hollow structure 28 are precisely matched with each other with a small gap, and the cylinder 9 can slide in the hollow structure 28 .

[0014] The regulating device 16 is composed of a vent hole 17 and a slide plate 18. The vent hole 17 connects the external atmospheric pressure with the space on the left side of the cylinder 9. The opening size of the vent hole 17 can be changed by adjusting the position of the slide plate 18.

[0015] The cylinder 9 is made of a strong magnetic material;

[0016] The secondary dart 13 is provided with a torsion spring 14 at the rear rotating shaft. When the cylinder 9 compresses the small spring 10 and is located on the left side of the hollow structure 28, the secondary dart 13 can be attracted by the cylinder 9 and gathered around the main dart 11. When the small spring 10 pushes the cylinder 9 to move right and contact the positioning body 15, the torsion spring 14 opens the secondary dart 13 to form a multi-headed fish dart.

[0017] A spring sheet 7 is fixed on the right side surface of the push rod 2. When the push rod 2 is pushed by hand so that the cylinder 9 compresses the small spring 10 and moves to the leftmost end, the right end of the spring sheet 7 passes through the retaining ring 4 and is stuck on the retaining ring 4, and the push rod 2 can no longer move axially.

[0018] The gun body includes an elastic clip 1g, a gun barrel 20, a movable handle 21, a first slide groove 22, a second slide groove 23, a sight 24, a fishing reel 25, an energy storage spring 26, a buttstock 27, a firing device 29, a trigger 30, a safety plug 31, and a reset handle 32.

[0019] A fishing reel 25 is installed on the upper portion of the rear end of the gun barrel 20 , a sighting scope 24 is installed on the upper portion of the fishing reel 25 , and a buttstock 27 is provided on the rear end of the gun barrel 20 .

[0020] The energy storage spring 26 is installed inside the right end of the barrel 20, and the left end of the energy storage spring 26 is connected to the cylindrical firing mechanism 29. A trigger 30 is provided on the barrel 20 at the left end of the firing mechanism 29. Pulling the reset handle 32 to slide backward along the second slide groove 23 drives the firing mechanism 29 to compress the energy storage spring 26. When the right end of the trigger 30 clamps the firing mechanism 29, the firing mechanism 29 compresses the energy storage spring 26 to the rightmost position.

[0021] The structural principle of the trigger 30 is as follows Fig. 9As shown, the left side of the upper end of the left snap ring 301 and the right snap ring 302 is inclined inward, and the connecting rod 304 is hinged to the left snap ring 301 and the right snap ring 302 respectively. The upper ends of the left snap ring 301 and the right snap ring 302 are pulled inward by the trigger spring 305, and the lower parts are connected together by the rotating shaft 303. When the trigger 30 is moved backward, the elongated hole at the lower end of the right snap ring 302 can slide a little on the rotating shaft 303 at the lower end of the left snap ring 301 under the action of the lever force, so that the upper ends of the left snap ring 301 and the right snap ring 302 open outward. After releasing the trigger 30, the left snap ring 301 and the right snap ring 302 return to their original positions.

[0022] The right side of the gun barrel 20 is also provided with a safety plug 31 and an elastic clip 19 in sequence. After the dart body is loaded from the front end of the gun barrel 20, the movable handle 21 is pressed down, and its front end is embedded in the ring groove 33. The movable handle 21 is pulled backward to embed the positioning ring 8 into the elastic clip 19 and clamp it. The safety plug 31 is pushed up from the bottom and inserted into the safety plug hole 3 on the dart body. The spring sheet 7 stuck on the clamp ring 4 is compressed, and the dart body is fixed in the gun barrel.

[0023] It can be seen from the technical solution provided by the present invention that the multi-headed spear shooting gun provided by the embodiment of the present invention has sufficient potential energy, is safe and stable, and all secondary darts are opened before hitting the target, which can greatly improve the hit rate of spear shooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the dart body of the multi-headed spear gun of the present invention when the secondary dart spines are opened.

[0025] Figure 2 It is a schematic diagram of the structure of the dart body of the multi-headed spear gun of the present invention when the secondary dart spines are retracted.

[0026] Figure 3 It is a cross-sectional view of the AA section of the harpoon dart body of the multi-head spear gun of the present invention.

[0027] Figure 4 It is a cross-sectional view of the BB body of the multi-head spear gun dart of the present invention.

[0028] Figure 5 It is a D-direction view of the harpoon dart body of the multi-head spear gun of the present invention.

[0029] Figure 6 It is a schematic diagram of the overall structure of the multi-head spear gun of the present invention.

[0030] Figure 7 It is a schematic diagram of the connection between the harpoon dart body and the gun body of the multi-head spear gun of the present invention.

[0031] Figure 8 It is a schematic structural diagram of the adjustment device of the multi-head spear gun of the present invention.

[0032] Fig. 9 The figure is a schematic diagram of the trigger structure of the multi-head spear gun of the present invention.

[0033] Fig.10 It is a schematic diagram of the operating state of the harpoon dart body of the multi-head spear gun of the present invention.

[0034] Fig.11 The present invention is a schematic diagram of the safety plug structure of a multi-head spear gun.

[0035] Fig.12 It is an enlarged view of the installation relationship of the movable handle of the multi-head spear gun of the present invention.

[0036] In the figure: 1, dart body, 2, push rod, 3, safety socket, 4, snap ring, 5, fishing line hole, 6, notch, 7, spring sheet, 8, positioning ring, 9, cylinder, 10, small spring, 11, main dart thorn, 12, barb, 13, secondary dart thorn, 14, torsion spring, 15, positioning body, 16, adjustment device, 17, vent hole, 18, slide, 19, elastic clip, 20, barrel, 21, moving handle, 22, first slide groove, 23, second slide groove, 24, sight, 25, fishing reel, 26, energy storage spring, 27, buttstock, 28, hollow structure, 29, firing device, 30, trigger, 31, safety plug, 32, reset handle, 33, ring groove, 301, left snap ring, 302, right snap ring, 303, rotating shaft, 304, connecting rod, 305, trigger spring. DETAILED DESCRIPTION

[0037] The implementation of the technical solution in the embodiment of the present invention is clearly and completely described below in conjunction with the drawings in the embodiment of the present invention.

[0038] Multi-head spear guns, such as Figure 1 , Figure 2 , Figure 6 , Figure 7 The invention discloses a harpoon gun, comprising a harpoon body and a gun body.

[0039] The fish dart body comprises a cylindrical dart body 1, a main dart spine 11 is arranged at the front end of the dart body 1, 4 to 8 auxiliary dart spines 13 are arranged on the periphery of the main dart spine 11, and barbs 12 are arranged on the main dart spine 11 and the auxiliary dart spines 13.

[0040] The front end of the cylindrical shape of the dart body 1 is provided with an annular groove 33, and the rear part is provided with a positioning ring 8. The rear end of the positioning ring 8 is provided with a fishing line hole 5 where the diameter is reduced, and the end is provided with a notch 6. The annular groove 33 and the positioning ring 8 are used to cooperate with the corresponding mechanism of the gun body to determine the position of the dart body in the gun body. The fishing line hole 5 is used for the fishing line to pass through, and the notch 6 can prevent the fishing line from being broken when the dart body is fired.

[0041] The interior of the dart body is a cylindrical hollow structure 28 , a small spring 10 is installed in the hollow structure 28 inside the front side of the main dart 11 , the right end of the small spring 10 is against the cylinder 9 , and an adjustment device 16 is provided at the front end of the main dart 11 .

[0042] A positioning body 15 is embedded in the middle of the cylindrical hollow structure 28 of the dart body, and a snap ring 4 is embedded near the tail of the dart body 1. A safety socket 3 is provided at the left end of the snap ring 4. After the push rod 2 passes through the snap ring 4 and the center hole of the positioning body 15, it is connected to the cylinder 9.

[0043] The cylinder 9 and the hollow structure 28 are precisely matched with each other with a small gap, and the cylinder 9 can slide in the hollow structure 28 .

[0044] The regulating device 16 is as follows Figure 8 As shown, it is composed of a vent hole 17 and a slide 18. The vent hole 17 connects the external atmospheric pressure with the space on the left side of the cylinder 9. By adjusting the position of the slide 18, the opening size of the vent hole 17 can be changed. When the cylinder 9 slides to the right in the hollow structure 28, the space on the left side of the cylinder 9 increases, forming a certain degree of vacuum. The speed of the cylinder 9 sliding to the right is determined by the degree of opening of the vent hole 17 and the elastic force of the small spring 10.

[0045] The cylinder 9 is made of a strong magnetic material;

[0046] The secondary dart 13 is provided with a torsion spring 14 at the rear end of the shaft, one end of the torsion spring 14 is pressed on the dart body 1, and the other end is pressed on the inner side of the secondary dart 13, so that the secondary dart 13 is opened outward. When the cylinder 9 compresses the small spring 10 to the left of the hollow structure 28, the secondary dart 13 can be attracted by the magnetism of the cylinder 9 and gathered around the main dart 11. When the small spring 10 pushes the cylinder 9 to move right and contact the positioning body 15, the magnetism of the cylinder 9 loses its effect, and the torsion spring 14 opens the secondary dart 13 to form a multi-headed fish dart.

[0047] A spring sheet 7 is fixed on the right side surface of the push rod 2. When the push rod 2 is pushed by hand so that the cylinder 9 compresses the small spring 10 and moves to the leftmost end, the right end of the spring sheet 7 just passes through the retaining ring 4 and is stuck on the retaining ring 4, and the push rod 2 can no longer move axially.

[0048] The gun body includes an elastic clip 19, a gun barrel 20, a movable handle 21, a first slide groove 22, a second slide groove 23, a sight 24, a fishing reel 25, an energy storage spring 26, a buttstock 27, a firing device 29, a trigger 30, a safety plug 31, and a reset handle 32.

[0049] The energy storage spring 26 is installed inside the right end of the barrel 20 and is made of a spring with a large stiffness coefficient. As the power source of the multi-head spear gun, the left end of the energy storage spring 26 is connected to the cylindrical firing device 29. A trigger 30 is provided at the lower part of the barrel 20 at the left end of the firing device 29. When the right end of the trigger 30 clamps the firing device 29, the firing device 29 compresses the energy storage spring 26 to the rightmost position.

[0050] The structural principle of the trigger 30 is as follows Fig. 9 As shown in the figure, the front of the upper end of the left snap ring 301 and the right snap ring 302 is inclined inward, and the connecting rod 304 is hinged with the left snap ring 301 and the right snap ring 302 respectively. The upper ends of the left snap ring 301 and the right snap ring 302 are pulled inward by the trigger spring 305, and the lower parts are connected together by the rotating shaft 303. When the trigger 30 is moved backward, under the action of the lever force, the elongated hole at the lower end of the right snap ring 302 can slide a little on the rotating shaft 303 at the lower end of the left snap ring 301, and the upper ends of the left snap ring 301 and the right snap ring 302 are opened outward, and the trigger is released. After the trigger 30 is pulled, the left and right snap rings 301 and 302 return to their original positions; when preparing to shoot, the firing mechanism 29 is pulled to the right, and the edge of the firing mechanism 29 hits the inclined surface of the snap ring, causing the upper ends of the left and right snap rings 301 and 302 to open outward. After the firing mechanism 29 slides over the snap rings, the left and right snap rings 301 and 302 return to their original positions to block the firing mechanism 29, and the energy storage spring 26 is compressed to enter the ready-to-shoot state; when installed, the trigger 30 is located at the lower part of the barrel 20, and the connecting rod 304 is fixed to the barrel 20.

[0051] The right side of the gun barrel 20 is also provided with a safety plug 31 and an elastic clip 19 in sequence.

[0052] The connection relationship between the mobile handle 21 and the gun barrel 20 is as follows: Fig.12 As shown, a deep groove 212 is opened in the first slide groove 22, the protrusion at the front end of the movable handle 21 is embedded in the deep groove 212, and the rear end passes through the compression spring 211 and is connected to the handle with a thread, and the compression spring 211 bounces the handle 21 outward.

[0053] After the dart body is loaded from the front end of the barrel 20, the movable handle 21 is pressed down, and its front end is embedded in the ring groove 33, and then the movable handle 21 is pulled backward to embed the positioning ring 8 into the elastic clip 19 and clamp it, and the safety plug 31 is pushed up from the bottom and inserted into the safety plug hole 3 on the dart body, so that the dart body can be fixed in the barrel. At this time, the movable handle 21 is released and can be placed in any position.

[0054] The safety plug 31 can be made into an elastic clip that can be stuck in any position in the barrel 20 without loosening. The upper part is made into a smooth conical surface, and the lower part of the safety socket 3 is also a smooth conical surface with a large cone angle. In this way, even if the safety socket 3 and the safety plug 31 are not completely aligned, they can be smoothly inserted into the hole to play a positioning role. At the same time, the safety plug 31 can compress the spring sheet 7 stuck on the retaining ring 4.

[0055] The elastic clip 34 can play a role in positioning and clamping when the dart body is installed, and can also make the dart body break free from the clamping force to generate explosive force and run smoothly when the spear gun is shooting.

[0056] Specific operation process

[0057] First, pass the fishing line on the fishing reel 25 through the gun barrel 20, and then through the fishing line hole 5 to tie the dart body, then push the push rod 2 forward so that the cylinder 9 compresses the small spring 10, and the push rod 2 moves to the spring sheet 7 and passes over the retaining ring 4, then release your hand, and the push rod 2 is clamped by the retaining ring 4.

[0058] Pull the reset handle 32 to slide backward along the second slide groove 23, driving the firing mechanism 29 to compress the energy storage spring 26. When the outer edge of the firing mechanism 29 hits the trigger 30, the upper ends of the left and right snap rings 301, 302 open outward. After the firing mechanism 29 slides over the snap rings, the left and right snap rings 301, 302 return to their original positions to block the firing mechanism 29. The energy storage spring 26 is compressed and enters a state ready to shoot.

[0059] After the dart body is loaded from the front end of the barrel 20, the movable handle 21 is pressed down, and its front end is embedded in the ring groove 33, and then the movable handle 21 is pulled backward along the first slide groove 22, the positioning ring 8 is embedded in the elastic clip 19 and clamped, and the safety plug 31 is pushed up from the bottom and inserted into the safety plug hole 3 on the dart body, so that the dart body can be fixed in the barrel. At this time, the movable handle 21 is released and can be placed in any position.

[0060] When the safety plug 31 is inserted into the safety plug hole 3 on the dart body, the spring sheet 7 stuck on the clamp ring 4 is compressed. At this time, the small spring 10 pushes the cylinder 9 and the push rod 2 to move right a short distance, so that the spring sheet 7 retreats to the inner hole of the clamp ring 4, and the right end of the push rod 2 abuts against the end face of the trigger 29, completing the preparation work of firing the spear gun.

[0061] When shooting, first pull the safety plug 31 downward, aim at the target through the sight 24, and then pull the trigger 30, so that the upper ends of the left and right snap rings 301 and 302 connected to the trigger 30 open outward, and the trigger 29, under the restoring force of the energy storage spring 26, quickly pushes the dart body to break free from the clamping force of the elastic clip 34 and fly out of the barrel 20 to hit the target. During operation, the push rod 2 and the cylinder 9 move rightward under the action of the small spring 10, and negative pressure is generated in the hollow structure 28 on the left side of the cylinder 9, which hinders the cylinder 9 from moving rightward, and the vent 17 of the adjustment device 16 slowly intakes air into the hollow structure 28 on the left side of the cylinder 9, so that the cylinder 9 moves slowly to the right. When the magnetic cylinder 9 moves to contact with the positioning body 15, the magnetic force of the cylinder 9 is not enough to attract the secondary dart thorn 13, and the torsion spring 14 opens the secondary dart thorn 13, forming a multi-headed dart shooting towards the target.

[0062] After the dart body is ejected, the fishing line can be driven by the fishing reel 25 to retrieve the dart body.

[0063] It can be seen from the technical solution provided by the present invention that the multi-head spear gun provided by the embodiment of the present invention has the following characteristics:

[0064] Sufficient potential energy: the energy storage spring 26 is made of a spring with a large stiffness coefficient;

[0065] Safe and stable: the safety plug 31 is inserted into the safety plug hole 3 on the dart body, so that the dart body can be fixed in the gun barrel 20, and even if the trigger 30 is pulled by mistake, the dart body will not be ejected.

[0066] Improve the hit rate of shooting fish: Generally, spear guns are single-headed darts, that is, they only have one dart. If there is a small error after shooting, it will fail. The hit rate of general spear guns is less than 30%. In this design, due to the use of multiple darts, the shooting target range can be expanded by more than ten times, so the hit rate of shooting can be greatly improved, and the hit rate can be as high as more than 90%. The running status of the dart body is as follows Fig.10 As shown, when the harpoon body is shot out from the barrel, in order to ensure its accuracy, the secondary darts 13 are all gathered around the main darts 11, and the effect is the same as that of a single harpoon. When the harpoon body approaches the target and the movement trajectory of the harpoon body is stable, the secondary darts 13 are opened, and the target can be hit even if there is a certain error during shooting.

[0067] In this design, the cylinder 9 is made of a strong magnetic material. When the cylinder 9 compresses the small spring 10 and is on the left side of the hollow structure 28, the secondary dart 13 can be attracted by the cylinder 9 and gathered around the main dart 11. When the small spring 10 pushes the cylinder 9 to move right and contact the positioning body 15, the magnetic force of the cylinder 9 is not enough to attract the secondary dart 13, and the torsion spring 14 instantly opens the secondary dart 13 to form a multi-headed fish dart. When the small spring 10 pushes the cylinder 9 to move right, the space on the left side of the cylinder 9 increases, forming a certain degree of vacuum, which prevents the cylinder 9 from sliding to the left. The speed of the cylinder 9 sliding to the left is determined by the degree of opening of the vent 17 and the elastic force of the small spring 10. Therefore, before shooting, the adjusting device 16 is first adjusted according to the distance of the target to be shot, the slide 18 is moved forward, the opening of the vent hole 17 is reduced, and the secondary dart 13 is opened later, which is suitable for shooting targets at a longer distance; the slide 18 is moved backward, the opening of the vent hole 17 is increased, and the secondary dart 13 is opened earlier, which is suitable for shooting targets at a closer distance.

Claims

1. A multi-head spear gun, comprising a spear dart body and a gun body, characterized in that: The fish dart body comprises a dart body (1) with a cylindrical shape, a main dart spine (11) is arranged at the front end of the dart body (1), 4 to 8 auxiliary dart spines (13) are arranged on the periphery of the main dart spine (11), and barbs (12) are arranged on the main dart spine (11) and the auxiliary dart spines (13); a ring groove (33) is arranged at the front end of the cylindrical shape part of the dart body (1), a positioning ring (8) is arranged at the rear, a fishing line hole (5) is arranged at the reduced diameter portion of the rear end of the positioning ring (8), and a notch (6) is arranged at the end; The interior of the fish dart body is a cylindrical hollow structure (28), a small spring (10) is installed at the hollow structure (28) inside the front side of the main dart thorn (11), the right end of the small spring (10) is against the cylindrical body (9), and the front end of the main dart thorn (11) is provided with an adjustment device (16); A positioning body (15) is embedded in the middle of the cylindrical hollow structure (28) of the dart body, a snap ring (4) is embedded near the tail of the dart body (1), a safety socket (3) is provided at the left end of the snap ring (4), and a push rod (2) is connected to the cylinder (9) after passing through the snap ring (4) and the center hole of the positioning body (15); the cylinder (9) and the inner cylindrical surface of the hollow structure (28) are precisely matched with a small gap, and the cylinder (9) can slide in the hollow structure (28), and the cylinder (9) is made of a strong magnetic material; A spring sheet (7) is fixed on the right side surface of the push rod (2). When the push rod (2) is pushed by hand so that the cylinder (9) compresses the small spring (10) and moves to the leftmost end, the spring sheet (7) passes through the snap ring (4) and the right end is stuck on the snap ring (4), so that the push rod (2) can no longer move axially. The gun body comprises an elastic clip (19), a gun barrel (20), a movable handle (21), a first slide groove (22), a second slide groove (23), a sighting mirror (24), a fishing reel (25), an energy storage spring (26), a buttstock (27), a firing device (29), a trigger (30), a safety plug (31), and a reset handle (32); the fishing reel (25) is installed on the upper part of the rear end of the gun barrel (20), the sighting mirror (24) is installed on the upper part of the fishing reel (25), and the buttstock (27) is provided on the rear end of the gun barrel (20); The energy storage spring (26) is installed inside the right end of the gun barrel (20), and the left end of the energy storage spring (26) is connected to the cylindrical firing device (29). A trigger (30) is provided on the gun barrel (20) at the left end of the firing device (29); the reset handle (32) is pulled to slide backward along the second slide groove (23), driving the firing device (29) to compress the energy storage spring (26); when the right end of the trigger (30) is stuck on the firing device (29), the firing device (29) compresses the energy storage spring (26) to the rightmost position; The right side of the gun barrel (20) is also provided with a safety plug (31) and an elastic clip (19) in sequence. After the dart body is loaded from the front end of the gun barrel (20), the movable handle (21) is pressed down, and its front end is embedded in the ring groove (33). The movable handle (21) is pulled backward along the first slide groove (22), and the positioning ring (8) is embedded in the elastic clip (19) and clamped. The safety plug (31) is pushed up from the bottom and inserted into the safety plug hole (3) on the dart body, and the dart body is fixed in the gun barrel (20). At the same time, the spring sheet (7) clamped on the clamp ring (4) is compressed and enters the inner hole of the clamp ring (4) under the push of the small spring (10); The safety plug (31) is made into an elastic clip, which can be stuck in any position in the gun barrel (20) without being loosened. The upper part of the safety plug (31) is made into a smooth conical surface, and the lower part of the safety socket (3) is also a smooth conical surface. When the safety plug (31) and the safety socket (3) are not completely aligned, the safety plug (31) can also be smoothly inserted into the safety socket (3); The auxiliary dart spur (13) is provided with a torsion spring (14) at the rear rotating shaft. When the cylinder (9) compresses the small spring (10) and is located at the left side of the hollow structure (28), the auxiliary dart spur (13) can be attracted by the cylinder (9) and gathered around the main dart spur (11). When the small spring (10) pushes the cylinder (9) to move rightward and contact the positioning body (15), the torsion spring (14) opens the auxiliary dart spur (13) to form a multi-headed fish dart. The regulating device (16) is composed of a vent hole (17) and a slide plate (18). The vent hole (17) connects the external atmospheric pressure with the space on the left side of the cylinder (9). The position of the slide plate (18) is adjusted to change the opening size of the vent hole (17).

2. The multi-head spear gun according to claim 1, characterized in that: The trigger (30) comprises a left snap ring (301) and a right snap ring (302) whose upper ends are inclined inwardly on the left side, and a connecting rod (304) is hinged with the left snap ring (301) and the right snap ring (302) respectively. The upper ends of the left snap ring (301) and the right snap ring (302) are pulled inwardly by a trigger spring (305), and the lower parts are connected together by a rotating shaft (303). When the trigger (30) is moved backward, under the action of a lever force, the elongated hole at the lower end of the right snap ring (302) can slide a little on the rotating shaft (303) at the lower end of the left snap ring (301), so that the upper ends of the left snap ring (301) and the right snap ring (302) are opened outward. After the trigger (30) is released, the left snap ring (301) and the right snap ring (302) return to their original positions.

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