126 results about "Sprat" patented technology

The underwater fish-luring device is configured for use in attracting fish by mimicking a sound that lobsters naturally produce. The underwater fish-luring device is an acoustic device. The underwater fish-luring device generates acoustic energy that can be detected underwater. The frequency profile of the generated acoustic energy attracts the lobster towards the underwater fish-luring device. The underwater fish-luring device comprises a plurality of levers, a torsion spring, and an acoustic generator. The torsion spring and the acoustic generator attach to the plurality of levers.

The invention discloses a jellyfish-imitating structure floating fish reef, and belongs to the technical field of artificial fish reefs. The jellyfish-imitating-structure floating fish reef comprises a buoyancy cabin, a plurality of vertically-hung strip-shaped tentacles and an anchoring assembly connected with the buoyancy cabin through a connecting cable set are arranged at the bottom of the buoyancy cabin, a bearing ring is fixedly connected to the lower portion of the buoyancy cabin, the strip-shaped tentacles are evenly distributed below the bearing ring, and through holes are formed in the bearing ring. A pair of arc-shaped moving plates are arranged on the buoyancy cabin in an attached mode, the pair of arc-shaped moving plates are fixedly connected with wave facing plates, the center position of the top of the buoyancy cabin is fixedly connected with a fixing plate, and the pair of arc-shaped moving plates are fixedly connected with extrusion rings. Kinetic energy is released after energy is stored through the extrusion spring, the extrusion ring is driven to press downwards periodically, water pressure flows in through the through hole, so that the strip-shaped tentacles are forced to shake at high frequency to simulate a movement mode when jellyfishes escape from natural enemies, and the dynamic trapping effect on fishes is remarkably improved.

The utility model relates to the technical field of fish farming, in particular to a fish farming anti-bird net convenient to fold and unfold, which comprises a plurality of groups of supports and a bottom groove, the top ends of the supports are provided with rails, the top ends of the rails are provided with notches, the bottom ends of the inner walls of the rails are fixedly connected with springs, and the bottom groove is provided with a plurality of grooves. The end face of the spring is fixedly connected with a movable plate, multiple sets of rolling balls are arranged at the top end of the movable plate, the rolling balls are embedded in the track, ropes are fixed to the outer portions of the rolling balls close to the edge of the support, and vertical rods are welded to the top ends of the rolling balls. According to the fish culture anti-bird net convenient to fold and unfold, by arranging the woven net surface, when the woven net surface is placed, the net can be folded and unfolded only by pulling the woven net surface by an operator, the woven net surface does not need to be detached from the bracket little by little, the operation difficulty and consumed operation time are reduced, and the fish culture anti-bird net convenient to fold and unfold is suitable for large-area fish pond culture; the problem that a large amount of time and manpower are needed to stretch or tighten the net face is solved.

The utility model discloses an adjustable oil pipe fishing spear, which relates to the technical field of oil pipe fishing, and comprises a fishing rod, a plurality of groups of clamping mechanisms are arranged in the fishing rod, each group of clamping mechanisms comprises a telescopic plate, a plurality of grooves are formed in the surface of the fishing rod, and a support column is fixedly arranged on the side wall, far away from an extrusion part, of each telescopic plate. Column grooves matched with the supporting columns are formed in the fishing rods, first springs sleeve the outer sides of the supporting columns, mounting grooves are formed in the tops of the sides, close to the extrusion part, of the telescopic plates, ejection blocks are hinged to the positions, located in the mounting grooves, of the telescopic plates, second springs are fixedly arranged on the side walls of the ejection blocks, and the ends, away from the side walls of the ejection blocks, of the second springs are fixed to the inner walls of the mounting grooves. The ejection block is driven by the elastic force of the second spring to turn outwards, then the multiple clamping parts abut against the inner wall of the oil pipe and are clamped, then the fishing rod is driven by the elevator to move upwards to enable the multiple sets of clamping mechanisms to clamp the oil pipe to be lifted out of an oil well, the elevator does not need to drive the fishing rod to sink by a deep distance, and the construction difficulty of oil pipe fishing is reduced.

The utility model belongs to the technical field of weighing devices, and particularly relates to a weighing connector which comprises an installation rod, a sliding hole is formed in the right end of the installation rod, and a square groove is formed in the left end of the sliding hole. When in use, the two ends of the mounting rod can be respectively connected with the dip net head and the dip net rod through the screw hole I and the screw rod I, and the dip net is vertically placed after fish is fished out of water through the dip net, so that the fish in the dip net head pulls the dip net head and the sliding column to descend, and the dip net head and the sliding column slide down. At the moment, a user can observe the scales displayed on the sliding column to judge the weight of the fish catch, so that the fish catch is weighed while being caught, the functionality of the dip net is effectively improved, the fishing experience is enriched, practicability is high, popularization is easy, and meanwhile when the device is used for a long time, the elasticity of the spring changes, and the fishing effect is good. The fine adjustment roller can be rotated to enable the stretching plate to move leftwards to stretch the spring, so that the spring stretching force is increased, the weight measurement accuracy is ensured, and the service life of the device is effectively prolonged.

The utility model belongs to the technical field of fish ball production, and particularly relates to a former for fish ball production, which comprises a fish ball forming machine body, one side of the fish ball forming machine body is detachably connected with a fish ball falling channel, and the outer wall of the fish ball falling channel is fixedly connected with a sputtering baffle plate. Expansion supporting arc plates are fixedly connected to the two sides of the sputtering shielding plate, expansion supporting springs are fixedly connected to the opposite sides of the two expansion supporting arc plates, a thick supporting arc pipe is fixedly connected to the inner wall of one expansion supporting arc plate, and a thin supporting arc pipe is fixedly connected to the inner wall of the other expansion supporting arc plate; an expansion supporting arc plate and an expansion supporting spring are matched to expand a sputtering baffle plate, and are matched with a fish ball falling channel to intercept splashed water when the fish balls fall into water; and the expansion supporting arc plate is matched with the expansion supporting spring, so that the fish ball falling channel can swing at a larger angle within the range of the pool.

The invention discloses a fish inlet structure of a fish passing facility, and relates to the technical field of fish passing facilities, the fish inlet structure comprises a fish passing channel, one side of the top end of the fish passing channel is movably connected with a first limiting side plate, and one side, far away from the first limiting side plate, of the top end of the fish passing channel is detachably provided with a second limiting side plate. A first limiting side plate and a second limiting side plate are arranged to limit the position of a fish body, meanwhile, a one-way drainage effect is achieved through protection buffer plates on the side faces of the first limiting side plate and the second limiting side plate, the problem that backflow of the fish affects drainage of other fingerlings is avoided, meanwhile, a plurality of buffer springs are arranged on the back faces of the protection buffer plates, and the safety of the fish is improved. When fishes pass through the space between the two protective buffer plates, the fishes directly impact the protective buffer plates, a certain buffer effect can be achieved through buffer springs, the problem that the protective buffer plates are damaged due to impact is avoided, the problem that the fingerling device is damaged can be avoided, and the drainage safety of the device is improved.

The utility model relates to the technical field of sea cucumber catching, and discloses a mechanical arm grabbing type sea cucumber catching device which comprises a supporting arm, a supporting rod is slidably connected to one side of the supporting arm, a support is fixedly connected to one side of the top of the supporting rod, a swing arm is rotationally connected to one side of the support, and a clamping jaw is installed at the bottom of the swing arm. A first spring sleeves the outer side of the end of the ejector rod, a pull rope is connected to the lower middle portion of the swing arm, a holding rod is rotatably connected to one side of the bottom of the supporting arm, a pull rod is rotatably connected to one side of the holding rod, a mounting frame is rotatably connected to one side of the pull rod, a wire wheel is mounted at the bottom of the mounting frame, and one side of the pull rope is connected to the outer side of the wire wheel. And a collecting net is mounted on one side of the supporting rod. According to the sea cucumber grabbing device, the pull rope can be pulled through the holding rod to drive the swing arm to enable the clamping jaw to move and approach the collecting net, the first spring drives the swing arm to reset after the holding rod is loosened, then sea cucumbers are grabbed instead of hands, contact with potential dangers is reduced, and safety is improved.

The invention relates to the field of fishery automatic fishing devices, and discloses an electronic information management fishery automatic fishing device which comprises a floating plate and a collection cage, the top side of the floating plate is fixedly connected with a lifting mechanism, and the exterior of the collection cage is fixedly connected with a plurality of collection mechanisms. The far sides of the multiple collecting mechanisms are fixedly connected with connecting frames, the inner walls of the top ends of the connecting frames are fixedly connected with adjusting mechanisms, the top sides of the inner walls of the collecting cages are fixedly connected with fish guiding mechanisms, the collecting mechanisms comprise multiple fishing cages, and the outer portions of the collecting cages are fixedly connected to the close sides of the multiple fishing cages; the upper side and the lower side of the fishing cage are each fixedly connected with two connecting plates. The size of the fish inlet is changed through sliding of the sliding plate, small fishes can swim out of the gap, and big fishes are intercepted. When the cam rotates to a specific position, a spring drives a limiting plate to reset through a side plate, a sliding plate is fixed, screening can be automatically conducted according to the size of fishes, and then the fishing efficiency is improved.

The utility model relates to the technical field of fishing equipment, in particular to a trigger linkage structure of an automatic fishing machine, which comprises a base, a locker, a lifting rod spring device and a trigger device. The locker is rotationally connected to the base. A containing groove is formed in the base, and a hook piece is arranged on one side, close to one end face of the fishing rod, of the locking device in a protruding mode. The trigger device comprises a buckling piece and a swinging piece. One end of the buckle piece is provided with a barb-shaped hook, and the hook is hung on the hook piece. The other end of the buckle piece is arranged at one end of the swing piece in an abutting connection mode, and the weight of the other end of the buckle piece is smaller than that of the end, provided with the hook, of the buckle piece. The other end of the swing piece is electrically connected with the inductor, and the inductor is electrically connected with an annunciator on the fishing rod. The lifting rod spring can lift the fishing rod and the locking device. The annunciator on the fishing line induces the stretching stroke of the fishing line to control the inductor to be powered off, unlocking efficiency is high, rod raising is faster and smoother, and automatic rod raising and fish pricking are achieved.

The present invention discloses a grooved scale unit and a drag-reducing, noise-suppressing and sound-absorbing covering layer based on a micro-spring tensioning structure, which is composed of a plurality of grooved scale units based on a micro-spring tensioning structure arranged end to end in a diamond array. The grooved scale unit based on the micro-spring tensioning structure includes a grooved scale, an upper platform, a connecting hinge, a local resonance rod, a local oscillator, a spring and a lower platform. The grooved scale is fixed to the upper end face of the upper platform, the longitudinally arranged local resonance rod is fixed to the upper and lower platforms respectively by a connecting hinge, and one end of the transversely arranged local resonance rod is fixed to the lower platform by a hinge, and the other end is connected to the upper and lower platforms by a spring. The present invention can well simulate the process of the scale tail generating low-speed vortices to suppress turbulence during the swimming process of carp fish, thereby reducing fluid resistance and hydrodynamic noise. The micro-spring tensioning structure has good multi-dimensional vibration absorption characteristics, which can effectively weaken the transmission of vibration noise inside and outside the covering layer.

This utility model relates to the field of spawning ponds and discloses a spawning pond for convenient collection of fish eggs. It includes a water tank, a winding mechanism, a support roller, a net, and a long rod. The winding mechanism is located at the rear end of the water tank. The support roller is fixedly mounted on both sides of the rear edge of the upper surface of the water tank via base bearings. The winding mechanism includes a roller, a collection frame, a rotating block, a reset rod, and two support rods. One end of the roller movably passes through one side of the front end of the collection frame and extends to the outside of the other side. The other end of the roller is rotatably mounted on the rotating block. A cam is fixedly fitted at the end of the roller located inside the collection frame. The reset rod movably passes through the rear end of the collection frame. A limit plate is fixedly installed at the front end of the reset rod, and a spring is fitted on the reset rod. In this utility model, the user rotates the handle to rotate the roller, gradually winding and tightening the net, which is then pulled out of the water. This facilitates single-person operation and significantly improves efficiency.

According to the technical scheme, the quantitative feeding device is characterized in that the quantitative feeding device comprises a buoyancy frame, a plurality of buoyancy barrels are fixedly installed on the bottom face of the buoyancy frame, a material barrel is fixedly installed in the buoyancy frame, and the outer circle wall face of the material barrel is fixedly sleeved with a fixing ring; the throwing assembly is arranged on the outer circle wall face of the material barrel and used for throwing baits for deep-sea breeding, the throwing assembly comprises a butt joint table, the butt joint table is arranged on the outer circle wall face of the fixing ring, and through the linkage rotation design of the fixing table and the butt joint table, the vertical height difference between the fixing table and the butt joint table caused by water level fluctuation is automatically compensated; it is ensured that a key butt joint part clamping column and a groove are always kept aligned on a space track, rigid butt joint obstacles caused by water level fluctuation are avoided, a cam-spring mechanism is driven through movement of a recovery steel rope, and the clamping column generates high-frequency micro-amplitude vibration.

The utility model discloses a kind of unloading's hypophthalmichthys nobilis square block hooks, including buoyancy plate and main line, the outer surface of the buoyancy plate is fixedly connected with a group of extension rods, the end of each extension rod away from buoyancy plate is fixedly connected with middle pipe arm, the inside of the buoyancy plate is fixedly embedded with bearing, the outer surface of the buoyancy plate is equipped with cover bait plate.The device is cooperated with first spring and second spring by the sub-line hook and intermediate line hook of setting, when hypophthalmichthys nobilis fish hook struggles violently, the great impact force generated by it can be converted into spring's elastic potential energy, thereby being effectively buffered and absorbed, avoid instantaneous rigid tensile force exceeding fish hook strength or fish lip tissue bearing limit, leading to fishing hook failure, can effectively solve the problem that because hypophthalmichthys nobilis is middle upper layer filter-feeding fish, impact force is stronger, many traditional hypophthalmichthys nobilis square block hooks cannot carry out unloading when fishing group is impacted, prone to unhooking phenomenon, will seriously affect user fishing experience problem.

The utility model relates to the technical field of lobster culture ponds, and provides a small green dragon culture pond which comprises an inserting groove formed in the surface of the inner wall of one side of a pond body and an anti-falling net inserted into the inserting groove, a pulling plate is fixedly installed on the surface of one side of the anti-falling net, and a through groove is formed in the surface of the outer wall of one side of the pond body. The limiting device comprises a sliding groove formed in the surface of one side of the pool body and two sliding blocks sliding in the sliding groove in a matched mode, a spring is fixedly installed between the two sliding blocks, the limiting device further comprises a hinged plate hinged to the surfaces of the sliding blocks, a T-shaped plate is hinged to the end, away from the sliding blocks, of the hinged plate, an inserting rod is fixedly installed on the surface of the T-shaped plate, and the inserting rod is fixedly connected with the limiting device. Through the limiting device, the anti-falling net can be limited and fixed in the pond body, then the purpose of preventing the small green dragon from escaping is achieved, and the effect of reducing economic losses is further achieved.

The embodiment of the utility model discloses a lossless fish body fixing operating table, an adjusting device comprises an adjusting assembly which is arranged at the top end of the operating table and is used for erecting a fish body, and a first driving assembly which is used for driving the adjusting assembly to move left and right is arranged in the operating table; a clamping assembly used for clamping and fixing the fish head is arranged on the right side of the fixing column, and a second driving assembly used for driving the clamping assembly to move left and right is arranged on the left side of the clamping assembly. The hand wheel drives the screw rod to rotate, so that the shoveling plate can be controlled to drive the fish body to be shoveled; the fixing frame is stretched to approach the fish body, and the spring is in a stretched state; then the clamping plates stored in the fixing frame are unfolded, then the clamping plates are locked through the locking rods, finally external force for stretching the fixing frame is released, under the elastic effect of the springs, the fixing blocks can be stored into the fixing columns along the round rods, and the clamping plates can be driven to clamp and fix the head and the tail of a fish body.

The invention discloses a pelteobagrus fulvidraco fixing frame and egg squeezing device and a using method, the pelteobagrus fulvidraco fixing frame and egg squeezing device comprises the egg squeezing device and the fixing frame fixedly installed at the top of the egg squeezing device, the egg squeezing device comprises a shell, the fixing frame comprises a supporting plate, the outer wall of the supporting plate is fixedly connected with two hollow plates at equal intervals, and the outer wall of the supporting plate is fixedly connected with the shell. Two arc-shaped elastic pieces are slidably connected into the hollow plate, the outer wall of the hollow plate is an inclined plane, third springs are fixedly connected to the inner wall of the bottom of the hollow plate, the third springs are fixedly connected with the bottoms of the arc-shaped elastic pieces, and the number of the third springs is four; the sliding door is controlled to be closed, after the pelteobagrus fulvidraco touches the pelteobagrus fulvidraco, the parent fish opens, the locked pectoral fin spines are hung on the arc-shaped elastic pieces, the pelteobagrus fulvidraco is conveniently fixed, a motor is started, and fish eggs are conveniently collected while automatic fish egg squeezing work is achieved.

The utility model discloses a fish processing belly opening device which comprises a processing table, one side face of the processing table is connected with a fixing assembly, the fixing assembly comprises two sliding grooves, the inner side wall of each sliding groove is connected with a sliding rod, and the outer surface of each sliding rod is connected with a mounting block in a sliding mode. According to the device, through sliding connection between a sliding groove and a mounting block, sliding connection between a sliding rod and the mounting block and resilience force of a telescopic spring, two clamping plates can conveniently and rapidly clamp and position fishes of different sizes, the situation that fish swing influences the belly opening efficiency is avoided, a cutting wheel can be driven to rotate through rotation of a power motor, and the cutting efficiency is improved. The rotating screw rod can be driven to rotate in the inner ring of the bearing seat in cooperation with rotation of the servo motor, the rotating screw rod is in threaded connection with the T-shaped fixing seat in cooperation with the rotating screw rod, the power motor and the cutting wheel can be driven to move to conduct belly opening operation on fishes, and the situation that people are stabbed is reduced.

The present application relates to a kind of floating fish luring device, including floating plate and multiple mutually connected group connection floating block, the group connection floating block one end is equipped with installation slot, the slot mouth of installation slot is rotatably connected with two mutually symmetrical turnover rods, the floating plate and group connection floating block are respectively fixedly connected with clamping mechanism, the clamping mechanism includes linkage plate and spring rod, the linkage plate is fixedly connected on the side wall of floating plate and group connection floating block;The group connection floating block of present application can be assembled is set, the number of group connection floating block is controlled, the fish luring range of entire fish luring device is increased, group connection floating block is mutually connected, the coverage of group connection floating block is extended, according to the size of fish pond is increased or decreased, more meet the requirement of fish pond fish luring, the group connection floating block of flexible adjustment, when setting, also more conform to the situation of use, carry out flexible increase or decrease, the group connection floating block of mutual rotation, when using, can be automatically shaken according to the condition of water surface, more high degree of flexibility.

1. The name of the design product: sea shell and crab clamping device (with switch spring labor saving). 2. The use of the design product: used for clamping sea shell and crab in deep water, suitable for various sea shell hunting activities. 3. The design points of the design product: the shape of the product. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to the technical field of fishing gears, and discloses a vehicle-mounted portable live fish transportation device which comprises a first base, and a plurality of first box walls are installed on the top of the first base. According to the vehicle-mounted portable live fish transportation device, a user plugs a first air port and inflates a first box wall installed at the top of a first base, so that the size of the device and the capacity capable of bearing water are increased, and when the size of the device needs to be reduced, only air in the first base or the first box wall needs to be exhausted through the first air port; the first air port and the first spring can automatically block the first air port after a user inflates or exhausts the first base or the first box wall, so that the device has the functions of rapid inflation and automatic sealing, the operation steps are simplified, the user can correspondingly inflate or exhaust according to requirements to control the size of the device, and the device is convenient to use. And the device can be conveniently placed in a transportation tool.

The invention provides a self-adaptive automatic fish killing device for small and medium-sized grass carps, and relates to the technical field of fresh food processing machinery. Comprising a rack, and a feeding device, an abdominal scale removing device, a roller device, a back scale removing device, a conveying device and a belly opening and viscera removing device which are sequentially arranged on the rack along the technological process. According to the multi-stage self-adaptive flexible scaling system, a floating knife roll is matched with a high-rigidity torsion spring, so that enveloping and scaling of fish bodies with different curvatures are realized; the special-shaped lawn pattern conveying belt module is adopted, so that the problems of slipping and flexible centering clamping of wet and slippery fish bodies are solved; the servo motor is matched with the lifting module to drive the laparotomy tool, and micron-level cutting depth control is achieved. The device is small in size, full-process automation is achieved, and the problems that existing equipment cannot adapt to thick and hard scales of grass carps, gallbladders are prone to being broken when laparotomy is conducted, and manual processing efficiency is low are effectively solved.

The utility model relates to the technical field of fishing gear baits, and discloses a novel bait for a fishing gear, which comprises a shell, a gear box is fixedly connected to the right side in the shell, a rotating rod I is rotatably connected to the left side in the gear box, a roller is fixedly connected to the middle upper part of the outer wall of the rotating rod I, and a pull rope is fixedly connected to one side of the roller. The other end of the pull rope penetrates through the left side of the gear box, a spring is fixedly connected to the lower middle portion of the outer wall of the first rotating rod, a second rotating rod is rotationally connected to the right side of the interior of the gear box, gears are fixedly connected to the middle of the outer wall of the second rotating rod and the middle of the outer wall of the first rotating rod, and the two gears are connected in an engaged mode. According to the utility model, through compression of the spring, the rotating rod I drives the rotating rod II to rotate through the gear, and meanwhile, the shifting plate rotates and extrudes the baffle and the spring, so that the rotating shaft drives the fishtail to shake repeatedly, the irregular swimming posture of fish is simulated, the fish is lured dynamically, and the fish lured success rate is greatly improved.

A mechanical pressure control type slip fisher capable of freely grabbing and releasing fallen fishes relates to the field of slip fishers and comprises an upper connector, a connecting sleeve, a spring, a fishing barrel, an anti-rotation sleeve, a rotating body, a guide control sleeve and a slip sleeve, the upper connector, the connecting sleeve and the fishing barrel are connected to form a fisher body, and the rotating body, the guide control sleeve and the slip sleeve are connected to form a fisher core string. The fisher core string and the spring are arranged in the fisher body, the spring is supported between the upper connector and the rotating body, the anti-rotating sleeve is installed on the inner side wall of the connecting sleeve, a guide groove is formed in the inner circumferential face of the anti-rotating sleeve, and guide sawteeth are arranged on the upper end face of the anti-rotating sleeve. The guide control sleeve is hung at the lower end of the rotating body, an anti-rotating wedge is arranged on the outer circumferential face of the guide control sleeve, guide control protruding teeth are arranged on the upper end face of the guide control sleeve, the slip sleeve is connected to the lower end of the guide control sleeve, the fisher achieves the free grabbing and releasing function through a combined structure of the anti-rotating sleeve, the rotating body and the guide control sleeve, and the safety, stability and reliability of free grabbing and releasing of fallen fishes can be enhanced.

The utility model relates to the technical field of bait production, and discloses a bait stirring device which comprises a supporting frame, the supporting frame is provided with a stirring device, the stirring device is provided with a cover plate, the cover plate is provided with a filter screen, a knocking assembly is arranged between the stirring device and the cover plate, the knocking assembly comprises an installation box, half teeth, a rack, an installation base and a knocking rod, and the installation base is arranged at the upper end of the cover plate. The knocking rod is arranged in the mounting base, a torsional spring is arranged between the knocking rod and the mounting base, the knocking rod is provided with an extension plate, the extension plate is provided with a first abutting block, the mounting box is arranged on the outer wall of the stirring barrel, the mounting box is provided with a sliding groove, the rack is arranged in the mounting box, a spring is arranged between the rack and the mounting box, the rack is provided with a connecting rod, and the connecting rod is provided with a second abutting block. The half teeth are arranged on the outer wall of the stirring device; a power piece is arranged on the outer wall of the stirring device; and through quick resetting of a second abutting block, a first abutting block is pressed downwards, so that a knocking rod downwards impacts a cover plate under the action of a torsional spring, and bait powder attached to the filter screen is knocked down.

The utility model provides a fishing device for a coiled tubing, which comprises an outer cylinder, an upper joint, a return spring and a pin hole for fixing the outer cylinder and the upper joint, wherein a key slot, a key block and an O-shaped sealing ring are arranged on the contact wall of the outer cylinder and the upper joint; the bottom of the upper connector is connected with a connecting cylinder, the lower end of the connecting cylinder is provided with an extension C-ring-shaped push block, a second spring between the push block and the upper connector and a pawl in threaded connection with the push block, and the inner side of the lower end of the pawl is provided with pawl teeth; the inner wall of the lower end of the outer cylinder is of an inverted circular truncated cone structure. When the fishing device is used for fishing a fish, under the combined action of the pawl, the second spring and the outer cylinder, the pawl can realize variable-diameter grabbing, the fish head fishing neck is grabbed through variable-diameter grabbing of the pawl or the fish head is anchored through pawl teeth, and the fish smoothly enters the fishing device to realize fish entering; when the fishing tool is used for fishing fishes without variable diameters, the fishes can be clamped through the pawl teeth, the fishes with the fishing necks can be fished through the variable-diameter positions of the pawls, fishing of fish heads of various sizes or shapes is achieved, and the fishing success rate is increased.

The utility model relates to the field of slingshot fish shooting, and discloses a slingshot fish dart fish shooting releaser which comprises a releaser shell, a threaded hole and a bowstring hanging opening are formed in the releaser shell, a pressing column is arranged in the releaser shell in a sliding mode, a positioning groove is formed in the pressing column, and a positioning pin is arranged in the threaded hole in a threaded mode. One end of the positioning pin penetrates through the positioning groove and abuts against the inner wall of the dispenser shell. By arranging the detachable elastic assembly and the adjusting assembly, a user can adjust the elastic force of the spring at any time according to the actual use condition, it is ensured that the locking and releasing force is always in the optimal state, and therefore the stability of the initial speed and direction of the fish dart in the launching process is ensured, the shooting accuracy and consistency are improved, and meanwhile the shooting efficiency is improved. A user can adjust the elastic force of the elastic assembly only by rotating the adjusting assembly without opening a bottom cover of the dispenser or using an external tool, so that the adjusting steps are effectively simplified, the user can complete adjustment in a short time, and the operation convenience is improved.

The invention discloses a large water body culture fish fingerling throwing device, and relates to the technical field of culture fish fingerling throwing, the large water body culture fish fingerling throwing device comprises a slideway, the slideway is provided with a buffer protection mechanism, and the buffer protection mechanism comprises a buffer plate. According to the large water body culture fingerling putting device, after fingerling is guided into the sliding way through the scattered fish inlet mechanism, the fingerling slides down along the inclined face of the sliding way, in the sliding-down process, part of water enters all the hollow water plates, so that the water bag is filled, the water bag is in a protruding state, and the water bag is prevented from falling off. Fish fingerlings are elastically buffered through the water bags, friction damage to the fish fingerlings in the sliding process is reduced, meanwhile, in the continuous sliding process of the fish fingerlings, the buffer spring rods and the buffer plates are matched to achieve step-by-step buffering of the fish fingerlings and reduce the sliding impact force of the fish fingerlings, and therefore it is ensured that the fish fingerlings can enter a throwing pool gently, impact damage is reduced, and the fish fingerlings are protected; and the survival rate of the fingerlings after being put is improved.

The invention discloses a variable stiffness rope-driven robotic fish, which comprises a robotic fish body, a control part and an electronic function module, the robotic fish body comprises a rigid fish head part, a flexible fish skeleton and an adjustable fish tail part, the flexible fish skeleton is formed by combining a variable stiffness mechanism and a rope and is used for driving the robotic fish to swim, and the variable stiffness characteristic is provided by a spring element; a variable stiffness mechanism is matched with a rope driven by a motor to simulate the antagonism of muscles when fishes swim in nature, so that the swim speed and efficiency are improved to a certain extent, and tail fins of different models can be detached and replaced at the tail part of the fish; the control part, the electronic function module and the power supply are all arranged in the cavity of the fish head part; the robotic fish is controlled by an infrared remote control open loop, can realize swinging of the fish tail at different frequencies, can be used for researching optimization of a variable stiffness mechanism, and is expected to be used in the fields of underwater exploration, environment detection and the like after being carried with other detection modules.

The multi-specification fish product screening device comprises a conveying belt, a screen, a stand column, a moving rod, a vibrating mechanism, a collecting tank and an adjusting mechanism, the adjusting mechanism comprises a lifting plate, an adjusting spring, an electric sliding table and a pushing plate, frozen fish slices to be screened are conveyed to the screen through the conveying belt, and under the action of the vibrating mechanism, the frozen fish slices are conveyed to the collecting tank. The frozen fish fillets can be screened on the screen, small-size fish fillets can enter the collecting tank below the screen, large-size fish fillets can enter the collecting tank on one side of the screen, multi-specification screening of fish products is achieved, the lifting plate is arranged in the collecting tank, and when the fish fillets fall onto the lifting plate, under the action of the adjusting spring, the fish fillets can be separated from the collecting tank, and the fish fillets can be separated from the collecting tank. On the other hand, the electric sliding table can push the fillets on the lifting plate through the pushing plate, so that the fillets are uniformly dispersed, the consistent falling height is ensured, and the fillets are further prevented from being damaged.