WO2025241937A1 - Switch trigger and alarm system thereof, and capturing device - Google Patents

Abstract

The present application relates to the field of aquatic product capturing tools, and discloses a switch trigger and an alarm system thereof, and a capturing device, mainly solving the problem of conventional crab capturing devices impossibly acquiring bait biting signals of crabs in a timely manner. The core invention is a switch trigger, comprising a conductive tube (1), a conductive rod (2) and a connecting member (3). A mechanical signal generated by a crab biting a bait can be sensitively sensed and converted into an electrical signal. On the basis of the switch trigger, conventional openable-closeable capturing devices and noose type capturing devices are upgraded and updated, so that the conventional capturing devices can sense bait biting signals of crabs in a timely manner. Also designed is a brand-new collet type capturing device, which solves the problem that in existing noose type capturing devices, a crab entering a noose is a probabilistic event. The present application improves the technical level of existing aquatic product capturing devices, enriches the market of aquatic product capturing devices, changes conventional crab capturing modes, and improves the crab capturing efficiency.

Description

A switch trigger, its alarm system, and a detection device. Technical Field

This invention relates to the field of aquatic capture tools, and in particular to a switch trigger, as well as an alarm system and capture device based on such a switch trigger.

Background Technology

There are various crab-catching devices on the market, all of which use bait to lure crabs for capture. However, it's generally difficult to detect when a crab takes the bait in time, especially in windy or choppy conditions, particularly in marine environments. This is likely due to the crab's unique feeding habits.

Chinese patent CN 213486499 U, entitled "A Crab Fishing Tackle," states in the section concerning crabs taking bait: "When a crab spots the bait, it will approach it and insert its claws or walking legs into the snare 5 to grab the bait. At this moment, immediately lifting the rod will allow the crab to be trapped and lifted through the snare 5." However, the patent does not explain how the crab catcher knows that a crab has spotted and taken the bait. Furthermore, for this type of trapping device using snares (rope loops), whether a crab enters the snare is a matter of probability.

In the Chinese patent with patent authorization number CN 216853498 U, titled "A Novel Crab Catching Cage", the inventor wrote in the section about crabs eating bait: "When the crabs climb onto the stainless steel wire 12 to eat the bait, hold the nylon fishing line 14 and lift it upwards." The patent does not mention how the crab catcher knows that there are crabs eating the bait.

Chinese patent CN 214257682 U, entitled "A Connector for a Float and a Bait Hook and a Fishing Tackle with the Connector," describes the crab-biting behavior in the patent: "When aquatic creatures such as fish, shrimp, and crabs feed, they cause the bait hook to move violently. This causes the swivel and float connected to the bait hook to move. Because the float has a ring on top, and the ring presses against the retrieval line, the retrieval line also moves. The fishing line connected to the retrieval line and the float on the fishing line also move on the water surface. At this time, the angler lifts the fishing rod." The patent specifically designed a device to capture the crab-biting signal. However, after purchasing and using this patented fishing tackle, I found that in calm conditions, it can promptly detect the crab-biting signal, but the intensity is weak. In windy and wavy conditions, especially when used at sea, it is almost impossible to detect the crab-biting signal.

Summary of the Invention

The technical problem to be solved by this invention is to design a switch trigger that is sensitive and can promptly acquire the signal of crabs taking the bait. Based on this switch trigger, an alarm system is designed to upgrade the traditional capture device and design a new capture device.

To solve the above-mentioned technical problems, the present invention adopts the following technical solution;

A switch trigger includes a conductive tube, a conductive rod, and a connector; at least one of the three components—the conductive tube, the conductive rod, and the connector—is elastic; the conductive tube and the connector are connected; the conductive rod and the connector are connected; the conductive rod is partially or entirely located inside the conductive tube; in its natural state, the conductive parts of the conductive tube and the conductive rod are not in contact and do not conduct; under the action of an external force, the elastic component of the three components deforms, causing relative movement between the conductive tube and the conductive rod, resulting in contact and conduction between their conductive parts; after the external force disappears, the conductive parts of the conductive tube and the conductive rod return to their natural non-contact, non-conducting state under the action of the elastic component's deformation recovery.

The aforementioned conductive tube can be a metal tube, such as an aluminum tube or a copper tube; it can also be a composite tube, such as a metal tube with an outer insulating layer and a metal ring inside at the contact point between the designed plastic tube and the conductive rod; or it can be a spring with a relatively close ring spacing, and the outside of the spring can be covered with an elastic insulating layer.

The aforementioned conductive rod can be hollow or solid; it can be a metal rod, such as a stainless steel rod, copper rod, or aluminum rod; it can also be a composite rod, such as a plastic rod with a conductive layer on the outside and a metal ring fitted at the contact point between the plastic rod and the conductive tube; it can also be a spring with closely spaced rings, with an elastic support insulating rod fitted inside the spring; one end of the conductive rod can be designed to hang objects, such as a fishhook or barb shape; the conductive rod can also be composed of a conductive metal rod, an insulating plastic rod post, and an external component connected in sequence, called a composite rod. The external component of the composite rod can be a hook or a fork; composite rods without external components can also be used; when using a composite rod, the connection point between the conductive rod and the connector is at the insulating plastic rod post, the metal rod of the conductive rod and the external component are separated and not connected, and the metal rod part of the composite rod extends into the conductive tube.

The aforementioned connector can be conductive, in which case at least one of the conductive rod and connector, or the conductive tube and connector, is insulated and non-conductive, ensuring that the switch trigger does not conduct under natural conditions; or it can be insulated, in which case it can be an elastic rubber tube, silicone tube, or latex tube, or an inelastic plastic tube, or a combination of two or more insulating material tubes; the connector can also have a sealing function, allowing the switch trigger to be used underwater;

When the connector is a sealed insulating elastic cylinder, it can be integrally molded or manufactured in sections and then combined. It can be made from materials such as latex, silicone, rubber, or in combination with plastics. The sealing performance of the sealed insulating elastic cylinder is mainly at the connection point with the external cable sleeve of the conductive rod/conductive tube. Common sealing methods include using the elasticity of the sealing insulating elastic cylinder itself to tighten at the connection point, applying sealant, using heat shrink tubing, using clamps, hose clamps, or screws. The sealed insulating elastic cylinder is filled with an insulating material, such as high-purity water, oil, inert gas, or air.

The aforementioned switch triggers made of conductive tubes and conductive rods are mainly suitable for external forces with a force perpendicular to the axial component of the conductive tube or conductive rod; there is also a type of combination of conductive tubes and conductive rods with a special structure that is suitable for external forces in any direction.

In this combination of conductive tubes and conductive rods with special structures, the portion of the conductive rod located inside the conductive tube is equipped with a conductive ring that is thicker than the adjacent conductive rod, and is tightly connected to the conductive rod. It can be sleeved or welded together. The two ends of the conductive ring inside the conductive tube are tightly connected to conductive ring segments, which can be sleeved or welded together. There is a hole in the middle of the conductive ring segment for the conductive rod to pass through. Under natural conditions, the conductive ring segment does not contact the conductive rod and conductive ring and conducts electricity. Under the action of external force, the conductive ring segment and the conductive rod and conductive ring make relative movement and contact and conduct electricity. After the external force is removed, the conductive ring segment returns to the state of non-contact and non-conductive with the conductive rod and conductive ring.

The aforementioned conductive tubes, conductive rods, and connectors can be combined in many ways to realize switch triggers.

A sealed switch trigger, based on the switch trigger described above, wherein the conductive tube is a metal tube, the conductive rod is a metal rod or a combination rod, and the connector is a sealed insulating elastic cylinder; the conductive tube is sleeved inside the sealed insulating elastic cylinder, and the conductive rod and one end of the sealed insulating elastic cylinder are sleeved together; one end of the conductive rod extends into the interior of the conductive tube, and the other end extends out of the sealed insulating elastic cylinder; the sealed insulating elastic cylinder is filled with an insulating material.

A sealed switch trigger with a bait-protecting structure, based on the sealed switch trigger described above, further includes a bait-protecting structure, which is assembled with the switch trigger. Optionally, the bait-protecting structure is fixed relative to a conductive tube, with the portion of the conductive rod extending beyond the sealed insulating elastic cylinder located within the bait-protecting structure, allowing the conductive rod to move relative to the bait-protecting structure under external force. Alternatively, the bait-protecting structure and the conductive rod can be fixed relative to each other, with the conductive tube located within the bait-protecting structure, allowing the conductive tube to move relative to the bait-protecting structure under external force. Alternatively, the movable end of the switch trigger relative to the bait-protecting structure can be positioned near the bait-taking opening, preventing the target crab from contacting the bait inside the bait-protecting structure through the opening, thus forcing the target crab to trigger the switch trigger before touching the bait.

The aforementioned bait protection structure originates from another patent titled "A Mechanical Trigger and Its Capturing Device," which refers to an obstacle between the bait and the target crab, preventing the target crab from directly contacting the bait placed inside the bait protection structure. The phrase "the target crab cannot directly contact the bait placed inside the bait protection structure" means that the target crab must overcome, bypass, or circumvent the obstacle before it can reach the bait. This is in contrast to the statement that the target crab can directly contact the bait. The statement that the target crab can directly contact the bait means that there is no obstacle between the target crab and the bait, and the target crab can run towards the bait without hindrance and directly contact it.

The design of bait-guarding structures varies widely. They can be spherical, square, pyramidal, or even open boxes. A major function of bait-guarding structures is to force crabs to exert more force to reach the bait.

The aforementioned bait-access opening is an opening provided on the bait-protecting structure, which is a channel provided so that the target crab can access the bait inside the bait-protecting structure.

Methods to change the sensitivity of a switch trigger include: changing the elasticity of the elastic component, such as changing its flexibility or reducing its size; reducing the contact distance between the conductive rod and the conductive tube at the point of contact; increasing the length of the conductive rod or conductive tube that moves under force; and so on.

A switch trigger alarm system includes a sealed switch trigger as described above, a cable, a power supply, and an alarm; one end of the cable is connected to a sealed insulating elastic sleeve, and its two ends are respectively connected to a conductive tube and a conductive rod; the two ends of the other end of the cable are connected to the power supply and the alarm.

A switch trigger alarm system with a protective bait structure includes a sealed switch trigger with a protective bait structure as described above, a cable, a power supply, and an alarm; one end of the cable is connected to a sealed insulating elastic sleeve, and its two ends are respectively connected to a conductive tube and a conductive rod; the two ends of the other end of the cable are connected to the power supply and the alarm, and the power supply and the alarm are connected together.

The aforementioned alarm is a device that can emit signals that are perceptible to humans, such as sound, vibration, light, odor, high temperature, low temperature, and radiation. The aforementioned power source includes button batteries, dry cell batteries, and rechargeable batteries. The aforementioned cables include wires, video cables, and signal cables.

A closing structure capture device includes a switch trigger alarm system or a switch trigger alarm system with a bait protection structure as described above, and an opening and closing capture module. The opening and closing capture module includes an opening and closing cage net body, an elastic component, a cable gathering component, and a pull rope. The elastic component is installed on the opening and closing cage net body to control the opening of the opening and closing cage net body. The pull rope is connected to the opening and closing cage net body and passes through the cable gathering component. The pull rope and the cable gathering component cooperate to control the closing of the opening and closing cage net body. The cable gathering component and the switch trigger of the switch trigger alarm system are installed on the opening and closing cage net body in cooperation with each other.

The opening and closing capture module is capable of automatically opening and closing by the elastic force of its own elastic components. Some also rely on the gravity of their own components, or only on the gravity of their own components. Under the action of external force, the external force overcomes the resistance of the force that caused it to open, causing the capture module to close. The elastic module is generally a spring, but it can also be a rubber band, fiberglass strip, etc. The function of the cable gathering component is to gather the pull ropes together and change the direction of the pull rope tension so that the opening and closing cage can close smoothly and as tightly as possible.

The hub assembly and the switch trigger of the switch trigger alarm system are installed together on the opening and closing cage net body. When using one of the switch trigger alarm systems described above, the switch trigger can be installed on the opening and closing cage net body, and the hub assembly can be installed on the switch trigger or on the opening and closing cage net body; alternatively, the hub assembly can be installed on the opening and closing cage net body, and the switch trigger can be installed on the hub assembly. When using the switch trigger alarm system with a bait protection structure described above, the bait protection structure can be installed on the opening and closing cage net body, and the hub assembly can be installed on the bait protection structure, on the opening and closing cage net body, or on the switch trigger; alternatively, the hub assembly can be installed on the opening and closing cage net body, and the bait protection structure can be installed on the hub assembly.

The concept of the opening and closing capture module is derived from the opening and closing capture devices commonly used in existing technologies.

Currently, there are four main types of opening and closing traps commonly used: spherical opening and closing traps, primarily derived from the Korean patent "Capture Structure for Fresh water Crab Fish" (application number KR2020090012433U) and the Chinese patent "A Novel Crab Trapping Trap" (patent authorization number CN 216853498 U); tower-shaped opening and closing traps, primarily derived from the US patents "CRAB-TRAP" (application number US19080433438A), "KNOCKDOWN CRAB-TRAP" (application number US19120721223A), and "CRAB-TRAP" (application number US19150058374A); and square opening and closing traps, primarily derived from the US patents "Crab trap" (application number US19230613774A) and "Crab trap" (application number US19230652247A). The term "trap" primarily originates from the British patent "CLAPTRAP" (application number GB8332188A) and the US patent "Book net for crabs, lobsters, and the like" (application number US19770762039A). Its structure can be broadly summarized into five parts: an opening/closing net body, an elastic component, a bait-hanging component, a line-gathering component, and a pull rope. Typically, the bait-hanging component and the line-gathering component are integrated together; in square opening/closing cages, the line-gathering component is sometimes the opening/closing net body itself. The opening/closing structure trapping device described in this invention is essentially obtained by replacing the bait-hanging component with the alarm system of this invention.

A snare trapping device includes a switch trigger alarm system or a switch trigger alarm system with a bait protection structure as described above, a snare base, and a snare; the snare is connected to the snare base; when using a switch trigger alarm system, the switch trigger is mounted on the snare base; when using a switch trigger alarm system with a bait protection structure, the bait protection structure and the snare base are combined together.

The rope loop is made of a rope with a small loop tied at one end and the other end passing through the loop to form a slipknot. After trapping an object, the slipknot becomes tighter and tighter. The rope can be a fishing line or a steel wire.

The rope base can be a bait cage, such as the bait cage used in US Patent No. US20060645957A "Castable crab trap" and Chinese Patent No. CN201820248276.5 "A Simple Crab Bait Cage"; it can be an iron ring, such as the ring rope attachment device used in US Patent No. US19910783522A "Crab trap apparatus" and the ring frame used in Chinese Patent No. CN201420627145.X "A Crab Fishing Tackle"; it can be a circular perforated metal sheet, such as the circular flat plate used in Chinese Patent No. CN202122440123.5 "A Net Cable Buckle and Crab Fishing Tackle"; or it can be a support made of twisted metal wire, such as the legs and frame used in Patent No. CN 213486499 U "A Crab Fishing Tackle".

The bait protection structure and the rope sling base can be combined in two ways: either they are connected together, making them two separate physical entities; or they can be integrated into a single functional unit, possessing the functions of both the bait protection structure and the rope sling base. In this case, the distinction between the bait protection structure and the rope sling base is not a physical structural division but a functional one, meaning the bait protection structure also functions as the rope sling base.

A claw-shaped bait-catching device includes a switch trigger alarm system as described above, a claw-shaped bait protection structure, a bait retrieval opening, a line management component, and a rope loop. The claw-shaped bait protection structure comprises a central body and claws, with the claws distributed around the central body, and at least three claws in total. The switch trigger alarm system is mounted on the claw-shaped bait protection structure. The portion of the conductive rod extending beyond the sealed insulating elastic cylinder is located inside the claw-shaped bait protection structure. The bait retrieval opening is located on the claw-shaped bait protection structure. The line management component is mounted on the claws. The rope loop is connected to the claw-shaped bait protection structure. Under the action of the line management component, the rope loop can unfold around the bait retrieval opening.

The claw-shaped bait protection structure resembles an open claw, or even a bacteriophage. The claw can be made of twisted metal wire, such as copper or steel wire; in this case, the central body can be formed by winding or welding iron wire together at one end of the claw, or by winding itself together; it can also be a section of iron pipe, with one end of the claw welded to the iron pipe; it can also be a perforated plastic part, with one end of the claw inserted into the hole of the plastic part; the claw can also be made of plastic, and the claw and the central body can be injection molded as a single piece.

The bait-taking opening is the opening formed between adjacent claws and the ground surface after the claw-shaped bait protection structure stands on the ground.

The line management component can be a plastic clip spaced apart on the claw; it can also be a plastic strip with a clamping groove that fits onto the claw; or it can be a clamping groove on the claw that is integrated with the claw. The plastic can be hard plastic, soft plastic, silicone, latex, or rubber. The function of the line management component in the rope loop is to allow the rope to be embedded in the clip or clamping groove, making it less likely to come out during casting or water flow, but allowing the rope to easily come out when caught on an object. The rope loop unfolds around the bait retrieval opening, with the loop's slipknots roughly distributed around the bait retrieval opening and roughly coinciding with the boundary of the opening.

For this type of claw-shaped snare capture device, a sinker can be added. The sinker should be placed in a position that ensures the center of gravity of the combination of the claw-shaped bait guard structure, line management components, rope snare, and switch trigger is biased towards the lower part of the combination, away from the upper part where the central body is located. This way, after the combination enters the water, under the action of its own weight and water resistance, the combination can stand upright on the bottom with the claws facing down and the central body up.

When the claw-shaped bait guard structure is designed and used in conjunction with the opening and closing capture module, insertion holes can be set on the opening and closing cage net body for direct plug-in installation. The claw tips of the claw-shaped bait guard structure can be vertically downward or bent horizontally, in which case the insertion hole direction corresponds to the direction of the claw tips.

An anchoring device includes a switch trigger alarm system as described above, and an anchoring hook; the switch trigger of the switch trigger alarm system is combined with the anchoring hook.

The so-called combination of switch trigger and anchor hook can mean that the switch trigger is installed on the anchor hook, or that the switch trigger is indirectly connected to the anchor hook through fishing line or wire.

A net-structured capture device includes a switch-trigger alarm system or a switch-trigger alarm system with a bait protection structure as described above, and a net. When using a switch-trigger alarm system, the switch trigger is mounted on the net; when using a switch-trigger alarm system with a bait protection structure, the switch trigger is mounted on the net or placed inside the net.

The net has an opening, with the net recessed towards the opening. The opening is typically made of wire, which is threaded through the mesh to open the net. For example, the hoop net used in US Patent No. US20030374188A, "POCKETED HOOP NET," has a switch trigger mounted on the wire. Switch triggers with a bait protection structure can be mounted on the wire or placed directly into the net. In use, the bait is threaded onto a conductive rod, and the device is thrown into the water. When a crab spots the bait, it grabs and eats it, triggering the switch trigger alarm system. The net is then lifted to catch the crab.

Based on the switch trigger and switch trigger alarm system described above, more existing capture devices can be upgraded, and more new capture devices can be designed.

When the above-mentioned devices involve connections such as sockets and plugs during manufacturing and use, in order to increase the strength of the connection, conventional methods such as setting threads, adding adhesive, adding sleeves, and using heat shrink tubing can be used to strengthen the connection and improve the sealing.

The cable of the switch trigger alarm system mentioned above can be used as the main line. To prevent the connection between the cable and the switch trigger from breaking during use, the detection device can be connected to a separate cable tied to the part of the cable that is off from the switch trigger, except for the main body of the switch trigger alarm system.

The design concept of this invention stems from the author's long-term observation of crabs' feeding behavior and experience using existing crab-catching devices. The author discovered that crabs prefer to hold and gnaw on bait, specifically by using both claws to grip the bait and directly biting it with their mouths, or by using one claw to hold the bait in place while the other claw picks off a piece and eats it. This method allows the crab to eat the bait with minimal movement or change in position; in other words, the displacement of the bait during normal crab feeding is extremely small. A device that can detect even the slightest force applied to the bait, and that can convert this minute displacement signal into a clearly perceptible signal for humans, unaffected by wind or waves, would be highly valuable. Therefore, this invention was developed.

This invention mainly uses crabs as an example to illustrate its content. In fact, this invention is also applicable to the capture of various organisms such as lobsters, eels, fish, chickens, ducks, and geese.

The capturing devices of the present invention can all improve their resistance to water flow and change their center of gravity by adding a lead weight.

The beneficial effects of the present invention are: 1. The switch trigger of the present invention can be triggered under the action of a slight external force, is sensitive to external force, and has a design suitable for underwater use.

2. The switch trigger alarm system of the present invention is unaffected by wind and waves and is extremely sensitive and energy-saving.

3. The present invention is an upgrade of the existing capture device based on the switch trigger alarm system, including an opening and closing structure capture device, a rope snare capture device, a fish anchoring device, and a net structure capture device. When prey such as crabs take the bait, the switch trigger alarm system can be triggered in time, so that the hunter can obtain the signal of the prey taking the bait in time and catch the prey in time, which changes the problem of traditional capture devices having no signal or the signal being affected by wind and waves.

4. The claw-sleeve structure trapping device of the present invention is a novel crab trapping device that ensures that crabs will enter the snare 100%, changing the problem that crabs entering the snare is a matter of probability in traditional snare trapping devices, and changing the problem that traditional snare trapping devices do not have timely signals of crabs taking the bait.

5. This invention improves the technical level of existing aquatic product catching devices, enriches the market for aquatic product catching devices, changes the traditional crab catching method, improves crab catching efficiency, and increases the enjoyment of crab catching.

Attached Figure Description

Figure 1 is a comparative diagram of four types of switch triggers;

Figure 2 is a schematic diagram of a switch trigger with a special structure of conductive tube and conductive rod;

Figure 3 is a comparative schematic diagram of two types of sealed switch triggers;

Figure 4 is a comparative schematic diagram of two sealed switch triggers with bait protection structures;

Figure 5 is a comparative schematic diagram of two sealed switch trigger alarm systems with and without a protective bait structure;

Figure 6 is a schematic diagram of a tower-shaped opening and closing cage of an opening and closing structure capture device;

Figure 7 is a detailed enlarged schematic diagram of the tower-shaped opening and closing cage elastic component and its connection point in an opening and closing structure capture device.

Figure 8 is a detailed enlarged schematic diagram of the connection between the tower-shaped opening and closing cage wire assembly and the switch trigger of an opening and closing structure capture device.

Figure 9 is a detailed enlarged schematic diagram of the tower-shaped opening and closing cage bait protection structure and the connection point of the opening and closing cage net of an opening and closing structure capture device.

Figure 10 is a schematic diagram of a spherical opening and closing cage of an opening and closing structure capture device;

Figure 11 is a schematic diagram of the opening and closing cage of a capture device with an opening and closing structure;

Figure 12 is a detailed enlarged schematic diagram of the elastic component of the opening and closing cage of a capture device with an opening and closing structure;

Figure 13 is a schematic diagram of a claw-sleeve structure capture device;

Figure 14 is a top view of the bait protection structure of a claw-sleeve structure bait capture device;

Figure 15 is a schematic diagram of a net-structured capture device;

Figure 16 is a schematic diagram of a fish anchoring device;

Figure 17 is a schematic diagram of another structure of an anchor fish device;

Figure 18 is a schematic diagram of a rope snare capture device;

Figure 19 is a schematic diagram of another structure of a rope snare capture device;

The components in the attached diagram are labeled as follows: 1. Conductive tube; 2. Conductive rod; 3. Connector; 4. Conductive ring; 5. Conductive ring segment; 6. Insulating terminal; 7. External component; 8. Bait protection structure; 9. Cable; 10. Power supply; 11. Alarm; 12. Opening/closing cage net body; 121. Square base plate; 122. Triangular side plate; 123. Connector; 124. Connecting hole; 125. Connecting rod; 126. Central base; 127. Steel wire; 128. Threading ring; 129. Net clamp plate; 1291. Gate-shaped stainless steel strip; 1292. Rotating connecting ring; 1293. Fishing net; 1294. 1295. Anti-rotation rod; 13. Tightened soft iron wire; 14. Elastic component; 15. Line gathering component; 16. Line gathering ring; 17. Pull rope; 18. Claw-shaped bait protection structure; 19. Central body; 10. Central hole; 11. Rope loop hole; 12. Claw hole; 13. Claw; 14. Line management component; 15. Rope loop; 16. Bait opening; 27. Anchor hook; 28. Central support; 29. Line binding rod; 200. Line binding ring; 201. Elastic steel wire; 202. Fish hook; 203. Main line; 204. Sinker; 21. Net bag; 22. Net bag ring; 213. Concave net; 24. Rope loop base;

Detailed Implementation

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

Example

A switch trigger, as shown in Figure 1a, has a conductive tube 1 being a thick aluminum tube without an opening at the top, a conductive rod 2 being a thin aluminum tube, and a connector 3 being an elastic rubber post with a central hole. The connector 3 is fitted into the middle of the conductive rod 2 and then inserted into the open end of the conductive tube 1. One end of the conductive rod 2 is inserted into the conductive tube 1, and the other end extends out of the conductive tube 1. In use, the two ends of the external circuit wires are connected to the conductive tube 1 and the conductive rod 2 respectively, fixing the conductive tube 1 or the conductive rod 2. When an external force is applied to the non-fixed conductive rod 2 or the conductive tube 1, the connector 3 deforms, and the conductive rod 2 and the conductive tube 1 come into contact due to relative movement, closing the switch trigger and connecting the external circuit. After the external force disappears, the connector 3 returns to its original shape, the conductive rod 2 and the conductive tube 1 no longer come into contact, and the external circuit is disconnected.

In Figure b, the conductive tube 1 is a stainless steel tube open at both ends, the conductive rod 2 is a thin stainless steel spring, and the connector 3 is a plastic piece with a hole in the center. The connector 3 is sleeved on one end of the conductive rod 2 and then sleeved on one end of the conductive tube 1. One end of the conductive rod 2 is inserted into the conductive tube 1, and the other end extends out of the conductive tube 1. In use, the two ends of the external circuit wires are connected to the conductive tube 1 and the conductive rod 2 respectively, fixing the conductive tube 1. When an external force is applied to the non-fixed conductive rod 2, the conductive rod 2 deforms, and the conductive rod 2 and the conductive tube 1 come into contact due to relative motion. The switch trigger closes, and the external circuit is connected. After the external force disappears, the deformation of the conductive rod 2 returns to normal, the conductive rod 2 and the conductive tube 1 no longer come into contact, and the external circuit is disconnected.

In Figure c, conductive tube 1 is a stainless steel spring, conductive rod 2 is a thin copper rod, and connector 3 is a plastic post with a central hole. Connector 3 is sleeved on one end of conductive rod 2 and then sleeved on one end of conductive tube 1. Conductive rod 2 is entirely located inside conductive tube 1. In use, the two ends of the external circuit wires are connected to conductive tube 1 and conductive rod 2 respectively, fixing the end of conductive tube 1 with connector 3. When an external force is applied to the non-fixed part of conductive tube 1, conductive tube 1 deforms, and conductive rod 2 and conductive tube 1 come into contact due to relative movement. The switch trigger closes, connecting the external circuit. After the external force disappears, the deformation of conductive tube 1 returns to normal, conductive rod 2 and conductive tube 1 no longer come into contact, and the external circuit is disconnected.

In Figure d, conductive tube 1 is a copper tube, conductive rod 2 is a thin copper rod, and connector 3 is a rubber sleeve with a central hole. The inner diameter of one end is less than or equal to the outer diameter of the conductive tube, and the inner diameter of the other end is less than or equal to the outer diameter of the conductive rod. Conductive tube 1 is sleeved on one end of connector 3, and conductive rod 2 is sleeved on the other end of connector 3. One end of conductive rod 2 extends into the interior of conductive tube 1, and the other end extends out of connector 3. In use, the two ends of the external circuit wires are connected to conductive tube 1 and conductive rod 2 respectively to fix conductive tube 1 or conductive rod 2. When an external force is applied to the non-fixed conductive rod 2 or conductive tube 1, connector 3 deforms, and conductive rod 2 and conductive tube 1 come into contact due to relative motion. The switch trigger closes, and the external circuit is connected. After the external force disappears, connector 3 returns to its original shape, conductive rod 2 and conductive tube 1 no longer come into contact, and the external circuit is disconnected.

Example

A switch trigger with a special structure of conductive tube and conductive rod is shown in Figure 2. The conductive tube 1 is a thick aluminum tube open at both ends, the conductive rod 2 is a thin aluminum rod, and the connector 3 is a rubber sleeve with a hole in the center. The inner diameter of one end is less than or equal to the outer diameter of the conductive tube, and the inner diameter of the other end is less than or equal to the outer diameter of the conductive rod. The conductive ring 4 is a small section of aluminum tube with an outer diameter smaller than the inner diameter of the conductive tube 1 and an inner diameter equal to or greater than the diameter of the conductive rod 2, so as to be able to fit tightly. The conductive ring segment 5 is a small section of aluminum tube with an outer diameter equal to or less than the inner diameter of the conductive tube 1, so as to be able to fit tightly. Its inner diameter is greater than the diameter of the conductive rod 2, and its inner diameter is smaller than the outer diameter of the conductive ring. There are two segments.

The conductive tube 1 is sleeved on one end of the connector 3, and the conductive rod 2 is sleeved on the other end of the connector 3. One end of the conductive rod 2 extends into the conductive tube 1, and the other end of the conductive rod 2 extends out of the connector 3.

The portion of the conductive rod 2 located inside the conductive tube has a conductive ring 4 that is thicker than the adjacent conductive rod, and it is tightly fitted together with the conductive rod 2; conductive ring segments 5 are tightly fitted at both ends of the conductive ring 4 inside the conductive tube; the conductive ring 4 is approximately located in the middle of the two conductive ring segments 5; to ensure a tight fit, welding or adhesive can be applied externally.

In use, the two ends of the external circuit's extended wires are connected to the conductive tube 1 and the conductive rod 2, respectively. The conductive tube 1 or the conductive rod 2 is fixed. When an external force of any direction is applied to the non-fixed conductive rod 2 or the conductive tube 1, the connector 3 deforms. The conductive rod 2 and the conductive tube 1 come into contact due to relative motion, the switch trigger closes, and the external circuit is connected. After the external force disappears, the connector 3 returns to its original shape, the conductive rod 2 and the conductive tube 1 no longer come into contact, and the external circuit is disconnected.

Example

A sealed switch trigger, as shown in Figure 3, is a sealed switch trigger without insulated terminals. The conductive tube 1 is a copper tube, the conductive rod 2 is a stainless steel rod with hooks, and the connector 3 is a sealed insulating elastic cylinder made of rubber with internal holes. It can be split in the middle to make it more convenient to use. The diameter of the hole in the middle is less than or equal to the outer diameter of the conductive tube 1, the hole at one end is smaller than the diameter of the conductive rod 2, and the hole at the other end is smaller than the diameter of the wire to be connected. The sealing effect is achieved by the material properties of the conductive tube 1, the conductive rod 2, and the wire to be connected. The conductive tube 1 is fitted inside the connector 3. The pole 2 is sleeved on one end of the connector 3. One end of the conductive rod 2 extends into the conductive tube 1, and the other end of the conductive rod 2 with a hook extends out of the connector 3. When in use, the external circuit wires pass through one end of the connector 3, and their two ends are respectively connected to the conductive tube 1 and the conductive rod 2 inside the sealed insulating elastic cylinder of the connector 3, fixing the conductive tube 1. When an external force is applied to the non-fixed conductive rod 2, the connector 3 deforms, and the conductive rod 2 and the conductive tube 1 come into contact due to relative movement. The switch trigger closes, and the external circuit is connected. After the external force disappears, the deformation of the connector 3 returns to normal, the conductive rod 2 and the conductive tube 1 no longer come into contact, and the external circuit is disconnected.

Figure b shows a sealed switch trigger with insulated terminals. The conductive rod 2 is a copper rod, and the conductive tube 1 and connector 3 are the same as described above. The external component 7 is a stainless steel hook. The insulated terminal 6 has a hole in the center but is broken in the middle. The diameter of the hole at one end is equal to or greater than the diameter of the conductive rod 2, so that it can be tightly inserted into the conductive rod 2. The hole at the other end is equal to or greater than the diameter of the external component 7, so that it can be tightly inserted into the external component 7. The conductive tube 1 is sleeved inside the connector 3. One end of the conductive rod 2 is inserted into one end of the insulated terminal 6, and the insulated terminal 6 is sleeved on one end of the connector 3. One end of the conductive rod 2 extends outwards. The external component 7, without hooks, is inserted into the conductive tube 1. One end of the external component 7 is inserted into the other end of the insulating terminal 6. When in use, the external circuit extends a wire through one end of the connector 3, and its two ends are respectively connected to the conductive tube 1 and the conductive rod 2 inside the sealed insulating elastic cylinder of the connector 3, thus fixing the conductive tube 1. When an external force is applied to the non-fixed external component 7 or the insulating terminal 6, the connector 3 deforms, and the conductive rod 2 and the conductive tube 1 come into contact due to relative movement. The switch trigger closes, and the external circuit is connected. After the external force disappears, the connector 3 returns to its original shape, the conductive rod 2 and the conductive tube 1 no longer come into contact, and the external circuit is disconnected.

Example

A sealed switch trigger with a protective bait structure is shown in Figure 4. Figure a shows a sealed switch trigger with a protective bait structure but without insulating terminals. The protective bait structure 8 is a square cage made of stainless steel tube and stainless steel wire. Figure b shows a sealed switch trigger with a protective bait structure but with insulating terminals. The protective bait structure 8 is a circular cage made of stainless steel tube and stainless steel wire. The rest of the structure is the same as in Embodiment 3. The protective bait structure 8 is tightly connected to the outer connector 3 of the conductive tube 1 through a stainless steel tube. The usage method is the same as in Embodiment 3.

Example

A switch trigger alarm system is shown in Figure 5. Figure a shows a switch trigger alarm system with insulated terminals but without a protective lure structure, while Figure b shows a switch trigger alarm system with insulated terminals and a protective lure structure. Cable 9 is a four-core video cable, with two cores combined into one strand; power supply 10 is a button battery; alarm 11 is an active buzzer; at one end of cable 9, the two strands are connected in series between power supply 10 and alarm 11 to form an external circuit; at the other end, after passing through one end of connector 3, the two strands are respectively connected to conductive tube 1 and conductive rod 2 inside the sealed insulating elastic cylinder of connector 3; the remaining markings are consistent with Figure b in embodiment 4; the usage method is the same as in embodiment 3.

Figure 3a shows a sealed switch trigger without insulated terminals, and Figure 4a shows a sealed switch trigger with a protective structure without insulated terminals. When combined with the external circuit formed by the cable 9, power supply 10, and alarm 11, they also become a switch trigger alarm system without insulated terminals and without protective structure, and a switch trigger alarm system with protective structure without insulated terminals.

Example

A tower-shaped opening and closing cage of an opening and closing structure capture device, as shown in Figure 6, uses a switch trigger alarm system with a non-insulated terminal and protective bait structure as described in Embodiment 5. The protective bait structure 8 is replaced by a pyramidal cage body welded from iron wire and iron pipe. The opening and closing cage mesh 12 is composed of a square base plate 121 and four triangular side plates 122 connected by a connecting rod 125. The connection is shown in Figure 7. The square base plate 121 and the triangular side plates 122 have protruding connectors 123 at the connection points. The connectors 123 have connecting holes 124. The connectors 123 are interlocked, and then the connecting rod 125 is inserted into these connecting holes 124 to connect the square base plate 121 and the triangular side plates 122. The elastic component 13 is a spring, which is connected in series with the connecting rod 125. At the connection between the square base plate 121 and the triangular side plate 122, when the spring is in its natural state, the square base plate 121 and the triangular side plate 122 are basically on the same plane, and the opening and closing cage net body 12 is in the open state; as shown in Figure 8, the line gathering assembly 14 is made of twisted iron wire, with a line gathering ring 141 at one end, and the other end is clamped after wrapping around the connector 3, thereby fixing the line gathering assembly 14 to the connector 3; the pull rope 15 is a fishing line, there are four of them, one end of the fishing line is connected to the top of the triangular side plate 122 that is offset from the elastic assembly 13, and the other end passes through the line gathering ring 141 at the top of the line gathering assembly 14 and is connected to the fishing main line; as shown in Figure 9, the bait protection structure 8 is glued to the middle of the square base plate 121 of the opening and closing cage net body 12, or the bait protection structure 8 can be twisted to the middle of the square base plate 121 of the opening and closing cage net body 12 by iron wire.

When in use, bait is hung on the hook end of the conductive rod 2, and then the catching device is thrown into the water. The opening and closing cage 12 opens naturally under the action of the elastic component 13. After the crab finds the bait, it uses its claws or legs to reach into the bait protection structure 8 to grab the bait, triggering the alarm. Upon hearing the alarm signal, the catcher pulls the main line, which drives the pull rope 15 to overcome the elasticity of the elastic component 13 and close the opening and closing cage 12, thus capturing the crab.

Example

As shown in Figure 10, a spherical opening and closing cage of an opening and closing structure trapping device uses a switch trigger alarm system with an insulated terminal and a protective bait structure as described in Embodiment 5. The opening and closing cage net body 12 is welded from a lead-made central base 126 and multiple steel wires 127. A threading ring 128 is provided at the top of the steel wires 127 that are off-center from the central base 126. The elastic component 13 is the steel wire 127 itself. In its natural state, the opening and closing cage net body 12 is in the unfolded state. The protective bait structure 8 is welded to... The center base 126 can also be fixed by drilling holes with screws or twisting iron wire. The line gathering assembly 14 is made of twisted iron wire, with a line gathering ring 141 at one end and the other end wrapped around the connector 3 and clamped, thus fixing the line gathering assembly 14 to the connector 3. The pull rope 15 is a fishing line, with four strands. One end of the fishing line is connected to the line loop 128, and then passes through the three adjacent line loops 128 in sequence, and finally passes through the line gathering ring 141 at the top of the line gathering assembly 14 to connect to the main fishing line.

When in use, bait is hung on the external component 7, and then the catching device is thrown into the water. The opening and closing cage net 12 opens naturally under the action of the elastic component 13. After the crab finds the bait, it uses its claws or legs to reach into the bait protection structure 8 to grab the bait, triggering the alarm. Upon hearing the alarm signal, the catcher pulls the main line, which drives the pull rope 15 to overcome the elasticity of the elastic component 13 and close the opening and closing cage net 12, thus capturing the crab.

Example

As shown in Figure 11, a net clamp cage with an opening and closing structure for catching fish uses a switch trigger alarm system without insulating terminals and a bait protection structure as described in Embodiment 5. The net body 12 of the opening and closing cage is formed by two net clamp pieces 129 connected by a connecting rod 125. The net clamp piece 129 is formed by connecting a portal stainless steel strip 1291 and a fishing net 1293. Three sides of the fishing net 1293 are connected to the portal stainless steel strip 1291, and the remaining side is connected to the connecting rod 125. Alternatively, a large square fishing net can be connected entirely to the two portal stainless steel strips 1291. The end of the portal stainless steel strip 1291 is twisted into a rotating connecting ring 1292 for connecting to the connecting rod 125. A stainless steel anti-rotation rod 1294 is welded to the middle of the connecting rod 125. When the net clamp is laid on the ground, it prevents the connecting rod 125 from rotating. The elastic component 13 is a spring, as shown in Figure 12. After the elastic component 13 is connected to the connecting rod 125, it is assembled with two gate-shaped stainless steel strips 1291. When the elastic component 13 is in its natural state, the two net clamp pieces 129 are in the open state. The line gathering component 14 is made of hard iron wire. One end has a line gathering ring 141. The other end is wrapped around the connecting rod 125 and clamped and welded, thus fixing the line gathering component 14 to the connecting rod 125. The connector 3 is assembled with the line gathering component 14 by wrapping the soft iron wire 1295 tightly. The pull rope 15 is a fishing line. There are two lines. One end of the fishing line is connected to the middle of the top of the gate-shaped stainless steel strip 1291, and then passes through the line gathering ring 141 at the top of the line gathering component 14 to connect to the fishing main line.

When in use, bait is hung on the hook end of the conductive rod 2, and then the catching device is thrown into the water. The opening and closing cage net 12 opens naturally under the action of the elastic force of the elastic component 13 and its own weight. After the fish find the bait, they bite it, triggering the alarm. Upon hearing the alarm signal, the catcher pulls the main line, which drives the pull rope 15 to overcome the elastic force of the elastic component 13 and close the opening and closing cage net 12, thus catching the fish.

Example

A claw-shaped bait-catching device, as shown in Figure 13, uses a switch trigger alarm system with insulated terminals but without a bait protection structure as described in Embodiment 5. The claw-shaped bait protection structure 16 includes a central body 161 made of plastic and claws 162 bent from steel wire. A silicone cable management component 17 is sleeved on the claws 162, with three claws sleeved on each claw. As shown in Figure 14, the claws 162 are distributed around the central body 161 through claw holes 1613 inserted into the central body 161. A rope loop 18 is connected to the central body 161 through a rope loop hole 1612. The switch trigger alarm system without a bait protection structure is installed on the claw-shaped bait protection structure 16 by inserting its connector 3 into the central hole 1611.

In use, first attach bait to the external component 7, then insert the rope loop 18 into the opening on the line management component 17, so that the rope loop 18 surrounds the bait-taking opening 19. Finally, cast the catching device into the water. The catching device will stand upright on the bottom. A lead weight can be added to the bottom of the claws to lower the center of gravity of the device, making it easier for the device to stand upright on the bottom. After the crab finds the bait, it will pass its claws or legs through the rope loop 18 to grab it, or its body through the rope loop 18 to grab it, triggering the alarm. Upon hearing the alarm signal, the catcher quickly pulls the main line to lift the claw-shaped bait protection structure 16. Part of the crab's body, such as its claws, will catch the rope loop 18, and the rope loop 18 will retract to tie the crab.

Example

A net-structured capture device, as shown in Figure 15, uses a switch trigger alarm system with an insulated terminal and a protective bait structure as described in Embodiment 5. The protective bait structure 8 is square. The net 21 includes a net loop 211 made of twisted steel wire and a concave net 212. The net loop 211 is threaded onto the net body at the opening of the concave net 212, keeping the opening of the concave net 212 open. Three pull ropes 15 are tied to the net loop 211 at intervals. The switch trigger alarm system is tightly wrapped with the net loop 211 by its connector 3 using tightly wound soft iron wire 1295.

When using the device, first attach bait to the external component 7, then throw the device into the water. When the crab finds it, it grabs the bait and triggers the switch to activate the alarm system. Then, lift the net to catch the crab.

Example

An anchoring device, as shown in Figure 16, uses a switch trigger alarm system with insulated terminals but without a bait protection structure as described in Embodiment 5. The anchor hook 20 includes a lead-cast central support 201, a binding rod 202, a binding ring 203, an elastic steel wire 204, and a fishhook 205. One end of the elastic steel wire 204 is crimped to the fishhook 205 via an aluminum sleeve, and the other end is cast into the central support 201. One end of the binding rod 202 is equipped with a binding ring 203 for connecting the main line, and the other end is also cast into the central support 201. The switch trigger alarm system with insulated terminals but without a bait protection structure is connected to the binding rod 202 via its connector 3 using tightly wound soft iron wire 1295, and then mounted on the anchor hook 20.

Figure 17 shows another type of anchoring device, using a switch trigger alarm system with insulated terminals but without a bait guard structure as described in Example 5. This is another combination of the switch trigger and the anchor hook. The sinker 207 is tied to one end of the main line 206. The anchor hook 20 is tied to the main line 206 at a distance from the sinker 207 by tightly wound soft wire 1295. The connector 3 of the switch trigger is also tied to the main line 206 at a distance from the anchor hook 20 by tightly wound soft wire 1295. When the main line 206 is taut, the axis of the switch trigger is parallel to the main line 206, and the plane of the hook 205 of the anchor hook 20 is perpendicular to the main line 206. In this connection combination, the anchor hook is lighter. The sinker 207 can be omitted when weighting the anchor hook 20.

Both types of anchor fishing devices are used by first attaching bait to the external component 7, and then casting the fishing device into the water. When the fish find the bait, they bite it, triggering the alarm. Upon hearing the alarm signal, the catcher quickly pulls the main line to lift the anchor hook 20, and the fish hook 205 catches the fish.

Example

A snare trapping device, as shown in Figure 18, uses a switch trigger alarm system with insulated terminals but without a protective bait structure as described in Embodiment 5. The snare base 22 includes a lead-cast central support 201, a zigzag-shaped binding rod 202 made of stiff iron wire, and an elastic steel wire 204. One end of the elastic steel wire 204 is connected to the snare 18 by pressing with an aluminum sleeve, and the other end is cast into the central support 201. One end of the binding rod 202 is provided with a binding ring 203 for connecting the main line, and the other end is also cast into the central support 201. The switch trigger alarm system with insulated terminals but without a protective bait structure is connected to the binding rod 202 by its connector 3 and wound together with a tightly wound soft iron wire 1295, and installed on the snare base 22.

Another type of snare capture device, as shown in Figure 19, uses a switch trigger alarm system with an insulated terminal and a bait protection structure as described in Embodiment 5. The bait protection structure 8 is pyramidal in shape. The snare 18 is directly connected to the bait protection structure 8. A rubber tube can be placed on the bait protection structure at the connection point to prevent the snare 18 from sliding back and forth. The number of snares 18 and the binding position can be selected independently according to the design and requirements. Alternatively, a weight can be added to the bait protection structure 8 to lower its center of gravity, making it easier for it to stand upright after landing.

Both types of snare traps are used by first attaching bait to the external component 7, then throwing the trap into the water. When the crab finds the bait and approaches, some of its limbs will accidentally get into the snare 18. After grabbing and biting, the alarm will be triggered. Upon hearing the alarm signal, the catcher will quickly pull the main line to lift the trap, and the snare 18 will trap the crab.

The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims (10)

A switch trigger, characterized in that: it comprises a conductive tube, a conductive rod, and a connector; at least one of the three components—the conductive tube, the conductive rod, and the connector—is elastic; the conductive tube and the connector are connected, and the conductive rod and the connector are also connected, with the conductive rod partially or entirely located inside the conductive tube; in its natural state, the conductive portions of the conductive tube and the conductive rod are not in contact and are not conducting; under the action of an external force, the elastic component among the three components deforms, causing relative movement between the conductive tube and the conductive rod, resulting in contact and conduction between their conductive portions; after the external force disappears, the conductive portions of the conductive tube and the conductive rod return to their natural non-contact, non-conducting state under the action of the elastic component's deformation recovery. According to claim 1, a switch trigger is provided: the conductive tube is a metal tube, the conductive rod is a metal rod or a combination rod, and the connector is a sealed insulating elastic cylinder; the conductive tube is sleeved inside the sealed insulating elastic cylinder, the conductive rod and one end of the sealed insulating elastic cylinder are sleeved together, one end of the conductive rod extends into the interior of the conductive tube, and the other end extends out of the sealed insulating elastic cylinder; the sealed insulating elastic cylinder is filled with an insulating material. According to claim 2, a switch trigger further includes a bait protection structure; the bait protection structure and the switch trigger are assembled together. A switch trigger alarm system, characterized in that: it includes a switch trigger as described in claim 2, a cable, a power supply, and an alarm; one end of the cable is connected to a sealed insulating elastic sleeve, and its two ends are respectively connected to a conductive tube and a conductive rod; the two ends of the other end of the cable are connected to the power supply and the alarm, and the power supply and the alarm are connected together. A switch trigger alarm system, characterized in that: it includes a switch trigger as described in claim 3, a cable, a power supply, and an alarm; one end of the cable is connected to a sealed insulating elastic sleeve, and its two ends are respectively connected to a conductive tube and a conductive rod; the two ends of the other end of the cable are connected to the power supply and the alarm, and the power supply and the alarm are connected together. A capture device for an opening and closing structure includes an opening and closing capture module, which comprises an opening and closing cage body, an elastic component, a cable concentrator, and a pull rope. The elastic component is installed on the opening and closing cage body to control the opening of the cage body. The pull rope is connected to the opening and closing cage body and passes through the cable concentrator. The pull rope and the cable concentrator cooperate to control the closing of the opening and closing cage body. The device is characterized in that it further includes a switch trigger alarm system as described in claim 4 or 5. The cable concentrator and the switch trigger of the switch trigger alarm system are installed on the opening and closing cage body in cooperation with each other. A snare trapping device includes a snare base and a snare; the snare is connected to the snare base, characterized in that: it further includes a switch trigger alarm system as described in claim 4 or 5; when using the switch trigger alarm system as described in claim 4, its switch trigger is installed on the snare base; when using the switch trigger alarm system as described in claim 5, its bait protection structure is combined with the snare base. A claw-shaped bait-catching device includes a rope loop, characterized in that it further includes a switch trigger alarm system as described in claim 4, a claw-shaped bait protection structure, a bait-taking opening, and a line-guiding component; the claw-shaped bait protection structure includes a central body and claws, with the claws distributed around the central body, and at least three claws; the switch trigger of the switch trigger alarm system is installed on the claw-shaped bait protection structure, the portion of the conductive rod extending beyond the sealed insulating elastic cylinder is located inside the claw-shaped bait protection structure, the bait-taking opening is located on the claw-shaped bait protection structure, the line-guiding component is disposed on the claws, and the rope loop is connected to the claw-shaped bait protection structure; under the action of the line-guiding component, the rope loop can be unfolded around the bait-taking opening. An anchoring device, comprising an anchoring hook, characterized in that: it further comprises a switch trigger alarm system as described in claim 4; wherein the switch trigger is combined with the anchoring hook. A net-structured capture device includes a net; characterized in that it further includes a switch trigger alarm system as described in claim 4 or 5; when using the switch trigger alarm system as described in claim 4, the switch trigger is mounted on the net; when using the switch trigger alarm system as described in claim 5, the switch trigger is mounted on the net or placed inside the net.