Small tuna lossless fishing device

Abstract

The invention relates to the technical field of fishery. A small tuna lossless fishing device comprises a shipborne fishing rod, an upper fishing line is arranged on the shipborne fishing rod, a lower fishing frame is arranged at the bottom of the upper fishing line, a plurality of net rods are rotationally arranged on the lower fishing frame, and net cloth is arranged between every two adjacent net rods. A force storage triggering mechanism used for driving the net rod to move downwards is arranged between the lower fishing frame and the upper fishing line, a lower fishing line synchronously linked with the force storage triggering mechanism and the net rod is arranged on the lower fishing frame, bait is arranged on the lower fishing line, and a buoy is arranged on the lower fishing frame. According to the lossless fishing device for the small tunas, the small tunas can be caught on a ship under the condition that the small tunas are not damaged basically, the breeding survival rate of the caught small tunas is greatly increased, and the higher fishing requirement can be met. The technical problems that in the prior art, in the tuna sea fishing process at present, the mouth of tuna is prone to being greatly damaged, the survival rate during later feeding is obviously reduced, and higher actual requirements cannot be met are solved.

Description

Technical Field

[0001] This invention relates to the field of fisheries technology, and in particular to a non-destructive fishing device for small tuna. Background Technology

[0002] Currently, tuna sea fishing mainly uses hooks, but the process of catching tuna can cause significant damage to their mouths, resulting in a significantly lower survival rate during later rearing. This affects the acquisition of accurate data and breeding, and fails to meet higher practical requirements, thus necessitating improvement. Summary of the Invention

[0003] This invention provides a non-destructive fishing device for small tuna that allows them to be caught and brought aboard with minimal damage, significantly improving the survival rate of the caught tuna and meeting higher fishing demands. It solves the technical problem in existing tuna fishing techniques, where hook fishing is commonly used, which easily damages the tuna's mouth during the catch, resulting in a significantly lower survival rate during rearing. This hinders the acquisition of accurate data and reproduction, ultimately failing to meet higher practical requirements.

[0004] The above-mentioned technical problem of the present invention is solved by the following technical solution: a non-destructive fishing device for small tuna, including a boat-mounted fishing rod, an upper fishing line on the boat-mounted fishing rod, a lower fishing frame at the bottom of the upper fishing line, a plurality of net poles rotatably mounted on the lower fishing frame, a net cloth between adjacent net poles, and the ends of the net poles can be gathered downward to form a flower bud-shaped limiting space; a power-accumulating triggering mechanism for driving the net poles downward is provided between the lower fishing frame and the upper fishing line, a lower fishing line is provided on the lower fishing frame that is synchronously linked with the power-accumulating triggering mechanism and the net poles, bait is provided on the lower fishing line, and a float is provided on the lower fishing frame. Before fishing, assemble all components. In the initial state, the net pole and net are unfolded, and the power-charging trigger mechanism is also in a charged state. Then, place the invention into the seawater at an appropriate depth, allowing the float to float on the surface. When a fish bites the bait and pulls the fishing line, the fishing line triggers the net pole and the power-charging trigger mechanism, causing the net pole and net to converge downwards, enveloping the small tuna. At the same time, the power-charging trigger mechanism causes the net pole to move downwards as a whole, making the top of the net closer to the head of the small tuna and more in line with its body shape. Compared to hook fishing, this can significantly reduce damage to the mouth of the small tuna, allowing it to be caught on the boat without injury.

[0005] Preferably, the lower fishing frame is equipped with several crossbars, and net poles are rotatably mounted at the ends of the crossbars. Each crossbar has a slidable constraint pin for limiting the position of the net pole. A pull-down rope extends from the end of the constraint pin, converges towards the center, and connects with the lower fishing rope. The converged lower fishing rope extends downward through the lower fishing frame. The number of crossbars corresponds to the number of net poles, and the number of crossbars and net poles can be adjusted according to needs, thereby reducing the gap between the net poles. This invention is illustrated using 12 net poles as an example. The 12 net poles are evenly distributed on the lower fishing frame. The constraint pins can limit the position of the net poles, and the lower fishing rope can drive the constraint pins to slide back and forth on the lower fishing frame, controlling the constraint and limiting of the crossbars.

[0006] Preferably, the lower fishing frame is provided with several reversing pulleys in a ring shape, corresponding to the lower fishing rope. The reversing pulleys ensure smooth sliding of the lower fishing rope, allowing the lower fishing rope to easily drag the restraining pin.

[0007] Preferably, each of the net poles has an upwardly extending constraint arm fixed at its top, which can be inserted into a constraint pin; a torsion spring is provided at the connection between the net pole and the crossbar. Before fishing, all components are assembled. In the initial state, the constraint arm is locked in the constraint pin. When a fish bites the bait and pulls the fishing line, it causes the constraint pin to slide inward. After the constraint arm loses its limit, the net pole rotates downward and retracts.

[0008] Preferably, the power-charging triggering mechanism includes two buckles suspended on the upper fishing line, with the ends of the buckles having barbed hook-like structures. A constraint protrusion is integrally formed on the lower fishing frame, with release grooves recessed towards the center on both sides of the constraint protrusion. The barbed structures at the ends of the buckles can be engaged in these release grooves. Before fishing, all components are assembled. In the initial state, the buckles are secured in the release grooves on both sides of the constraint protrusion, ensuring that the buckles can be hooked into the release grooves while also being easily separated by the pull of the lower fishing line. When a fish bites the bait and pulls the lower fishing line, the buckles open to the sides, disengaging from the release grooves.

[0009] Preferably, the buckle plate is fitted with an elastic rubber restraint ring. The function of the rubber restraint ring is to ensure that the buckle plate will not easily detach when the invention is placed underwater, and will only detach when pulled by the fishing line.

[0010] Preferably, adjacent buckle plates are connected by a connecting rope, which is equipped with a time-delay spring. An upper pull rope is located at the bottom of the time-delay spring and extends downwards to connect with the lower fishing line. The function of the time-delay spring is to delay the opening of the buckle plate. When a fish bites the bait and pulls the lower fishing line, it first causes the restraint pin to slide inwards. After the restraint arm loses its limit, it rotates downwards and converges under the action of the torsion spring and the strong magnet. The strong magnet firmly attracts the fish. When the fish continues to move while still holding the bait, the time-delay spring, acting as a time delay mechanism, pulls the buckle plate to swing open to both sides, disengaging it from the release groove. The time-delay spring can be replaced by a structure such as an elastic rope.

[0011] Preferably, both the tripping groove and the restraining pin are equipped with tripping balls. The function of the tripping balls is to reduce the friction between the buckle plate and the tripping groove, and between the restraining arm and the restraining pin, so that the buckle plate and the restraining arm can be easily disengaged from the tripping groove and the restraining pin.

[0012] Preferably, the power-charging triggering mechanism also includes an upper fishing frame fixed inside the buckle plate, with a rotation gap reserved between the upper fishing frame and the buckle plate; a power-charging spring is provided between the upper fishing frame and the constraint protrusion. Before fishing, all components are assembled. In the initial state, the constraint arm is locked in the constraint pin, and the buckle plate is fastened in the release grooves on both sides of the constraint protrusion, so that the buckle plate can be hooked in the release groove and can be easily separated under the pull of the lower fishing line. At this time, the power-charging spring is in a compressed state. When the fish bites the bait and moves, the delay spring, which acts as a delay, will pull the buckle plate to swing open to both sides. The buckle plate is released from the release groove. Under the action of the power-charging spring, the lower fishing frame and the net rod descend rapidly as a whole. With the gradually converging net rod and net cloth, the small tuna can be quickly wrapped up. At this time, the float will sink to the bottom of the water. After the angler discovers it, he can retrieve the fishing rod and enter the catch stage.

[0013] Preferably, the net poles are curved, with a spherical strong magnet at the bottom of each pole. When the curved net poles are closed, they form a bud-like structure that encloses the small tuna. The curvature and length of the net poles can be adjusted according to different situations to control the shape of the net poles when they close. The spherical strong magnets can both drive the net poles to rotate downwards quickly to close, and when the net poles close downwards, the strong magnets will firmly attract each other, allowing the net to enclose the small tuna.

[0014] Therefore, the non-destructive fishing device for small tuna of the present invention has the following advantages: it can catch small tuna on the boat with virtually no damage, greatly improve the survival rate of the caught small tuna, and can meet higher fishing demands. Attached Figure Description

[0015] Figure 1 This is a front view cross-sectional view of the initial state of the non-destructive fishing device for small tuna according to the present invention.

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 yes Figure 1 Enlarged view of section B in the middle.

[0018] Figure 4 yes Figure 3 Enlarged view of point C in the middle.

[0019] Figure 5 yes Figure 1 A top-view sectional structural diagram.

[0020] Figure 6 yes Figure 5 Enlarged view of point D in the middle.

[0021] Figure 7 yes Figure 6 Enlarged view of point E in the middle.

[0022] Figure 8 This is a front sectional view of the non-destructive fishing device for small tuna of the present invention in its retracted state.

[0023] Figure 9 yes Figure 8 Enlarged view of point F in the middle.

[0024] Figure 10 yes Figure 8 Enlarged view of point G in the middle.

[0025] In the diagram, the following components are included: 1. Boat-mounted fishing rod; 2. Upper fishing line; 3. Lower fishing frame; 4. Buckle plate; 5. Rubber restraint ring; 6. Restraint protrusion; 7. Release groove; 8. Energy storage spring; 9. Delay spring; 10. Upper pull rope; 11. Crossbar; 12. Net rod; 13. Torsion spring; 14. Restraint pin; 15. Lower pull rope; 16. Lower fishing line; 17. Bait; 18. Reversing pulley; 19. Restraint arm; 20. Release ball bearing; 21. Netting; 22. Strong magnet; 23. Buoy. Detailed Implementation

[0026] The technical solution of the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] Example: like Figure 1 and 2 As shown in 3 and 4 and 5 and 6 and 7 and 8 and 9 and 10, a non-destructive fishing device for small tuna includes a boat-mounted fishing rod 1 installed on the hull of a boat. The boat-mounted fishing rod 1 is connected to an upper fishing line 2 via a pulley. The bottom of the upper fishing line 2 is connected to a power-charging trigger mechanism. The bottom of the power-charging trigger mechanism is connected to a lower fishing frame 3.

[0028] The power-charging triggering mechanism includes two buckle plates 4 symmetrically suspended on the upper fishing line 2. The ends of the buckle plates 4 are barbed structures. An upper fishing frame is installed on the inner side of the buckle plates 4, and a rotation gap is reserved between the upper fishing frame and the buckle plates 4.

[0029] A rubber restraint ring 5 is fitted on the outer side of the buckle plate 4.

[0030] The power-charging trigger mechanism also includes a constraint protrusion 6 integrally formed in the middle of the lower fishing frame 3. The constraint protrusion 6 has symmetrical release grooves 7 recessed towards the center on both sides. The barb structure at the end of the buckle plate 4 can be locked in the release groove 7.

[0031] A power storage spring 8 is installed between the upper fishing frame and the constraint protrusion 6, with both ends of the power storage spring 8 being fixedly connected to the upper fishing frame and the constraint protrusion 6 respectively.

[0032] The tops of two adjacent buckle plates 4 are connected by a connecting rope. A time-delay spring 9 is installed on the connecting rope. An upper pull rope 10 is fixed to the bottom of the time-delay spring 9. The upper pull rope 10 passes through the energy storage spring 8 and extends downward.

[0033] The lower fishing frame 3 has 6 horizontal bars 11 installed in a ring. Each horizontal bar 11 has a net rod 12 rotatably installed at its end. A torsion spring 13 is installed at the connection between the net rod 12 and the horizontal bar 11.

[0034] Each crossbar 11 is slidably mounted with a constraint pin 14, and a pull-down rope 15 is installed inside each constraint pin 14. The pull-down rope 15 converges with the pull-up rope 10 in the middle, and the knot after convergence passes through the lower fishing line 16. The end of the lower fishing line 16 is covered with bait 17 through a net belt.

[0035] The lower fishing frame 3 is equipped with 6 reversing pulleys 18 that correspond to the pull-down rope 15.

[0036] Each pole 12 is fixedly equipped with a constraint arm 18 at its top, which can be inserted into the constraint pin 14.

[0037] Both the restraint pin 14 and the release groove 7 are equipped with release balls 20.

[0038] The net pole 12 is an arc-shaped pole, and the end of the net pole 12 can be converged downwards; a net cloth 21 is installed between two adjacent net poles 12, and the edge of the net cloth 21 is an elastic rope. A spherical strong magnet 22 is installed at the bottom of each net pole 12, and the strong magnets 22 attract each other.

[0039] Several buoys 23 that can float on the sea surface are installed on the fishing rack 3.

[0040] Before fishing, assemble all the parts. In the initial state, the constraint arm 18 is locked in the constraint pin 14, and the buckle plate 4 is fastened in the release grooves 7 on both sides of the constraint protrusion 6, so that the buckle plate 4 can be hooked in the release groove 7 and can be easily separated under the pull of the fishing line 16. At this time, the energy storage spring 8 is in a compressed state.

[0041] The invention is then placed in seawater at an appropriate depth, so that the buoy 23 floats on the surface of the water.

[0042] When a fish bites the bait 17 and pulls the fishing line 16, it causes the restraint pin 14 to slide inward. After the restraint arm 18 loses its limit, it will rotate downward and converge under the action of the torsion spring 13 and the strong magnet 22, and the strong magnet 22 will be firmly attracted together.

[0043] When the fish bites the bait 17 and continues to move, the delay spring 9, which acts as a delay mechanism, will pull the buckle 4 to swing open to both sides. The buckle 4 will disengage from the release groove 7. Under the action of the storage spring 8, the lower fishing frame 3 and the net rod 12 will descend rapidly as a whole. With the gradually converging net rod 12 and net cloth 21, the small tuna can be quickly wrapped up. At this time, the float 23 will sink to the bottom of the water. Once the angler discovers it, he can retrieve the fishing rod and enter the catch stage.

[0044] The specific embodiments described herein are merely illustrative of the inventive concept. Those skilled in the art may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A non-destructive tuna fishing device, characterized by: The application relates to a ship-mounted fishing rod, which is provided with an upper fishing line, the bottom of the upper fishing line is provided with a lower fishing frame, a plurality of net rods are rotatably arranged on the lower fishing frame, a net cloth is arranged between adjacent net rods, the end of the net rod can be gathered downwards to form a bud-shaped limiting space, a force-accumulating trigger mechanism is arranged between the lower fishing frame and the upper fishing line to drive the net rods to move downwards, a lower fishing line is arranged on the lower fishing frame and is synchronously connected with the force-accumulating trigger mechanism and the net rods, a fish bait is arranged on the lower fishing line, and a float is arranged on the lower fishing frame.

2. A non-lethal tuna fishing device according to claim 1, characterized in that: A plurality of cross rods are arranged on the lower fishing frame, the net rods are rotatably arranged at the ends of the cross rods, a constraint pin for limiting the net rods is slidably arranged on each cross rod, a pull-down rope is led out from the end of the constraint pin, the pull-down ropes converge at the middle part and are connected together with the lower fishing line, and the converged lower fishing line extends downwards through the lower fishing frame.

3. A non-lethal tuna fishing device according to claim 2, characterized in that: A plurality of reversing pulleys corresponding to the pull-down ropes are annularly arranged on the lower fishing frame.

4. A non-lethal tuna fishing device according to claim 1, characterized in that: The top end of each net rod is fixed with an upward-extending constraint arm which can be inserted into the constraint pin; and a torsional spring is arranged at the connecting position of the net rod and the cross rod.

5. A non-lethal tuna fishing device according to claim 1, characterized in that: The force-accumulating trigger mechanism comprises two buckle plates which are hung on the upper fishing line, the end of each buckle plate is provided with a barb structure; a constraint protrusion is integrally arranged on the lower fishing frame, a decoupling groove recessed towards the middle part is arranged on the two sides of the constraint protrusion, and the barb structure of the end of the buckle plate can be clamped in the decoupling groove.

6. A non-lethal tuna fishing device according to claim 5, wherein: A flexible rubber constraint ring is arranged on the buckle plate.

7. A non-lethal tuna fishing device according to claim 6, characterized in that: Two adjacent buckle plates are connected through a connecting rope, a time-delay tension spring is arranged on the connecting rope, the bottom of the time-delay tension spring is provided with an upper pull-down rope, and the upper pull-down rope is connected together with the lower fishing line downwards.

8. A non-lethal tuna fishing device according to claim 5, characterized in that: Decoupling balls are arranged in the decoupling groove and the constraint pin.

9. A non-lethal tuna fishing device according to claim 5, characterized in that: The force-accumulating trigger mechanism further comprises an upper fishing frame fixed on the inner side of the buckle plate, a rotating gap is reserved between the upper fishing frame and the buckle plate; and a force-accumulating spring is arranged between the upper fishing frame and the constraint protrusion.

10. A non-lethal tuna fishing device according to claim 1, characterized in that: The net rod is an arc-shaped rod, and a spherical strong magnet is arranged at the bottom end of each net rod.

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