A device for biologically trapping flies, mosquitoes, and cockroaches

Abstract

The application discloses a device for biologically trapping flies, mosquitoes and cockroaches, and belongs to the technical field of biological trapping of sanitary pests. The device solves the problems of single function and easy escape of cockroaches of the existing pest trapping device. The device comprises a connecting rod, a cockroach trapping structure fixedly installed at the bottom end of the connecting rod, and a mosquito and fly trapping structure of adjustable height slidably installed on the connecting rod. The cockroach trapping structure adopts a cockroach channel with a one-way thin aluminum plate turning plate matched with a drawer type cockroach sticky board for collection. A solid bait storage cylinder with an air outlet groove is arranged at the top. The mosquito and fly trapping structure adopts a combination of an ultraviolet trapping lamp and a liquid slow-release bait. A conical filter screen tip is fixed at the top end of a bottom pipe to form a one-way barrier. The bottom end of the bottom pipe is located above a boss. Through a layered integrated design, efficient trapping of three kinds of pests is realized, the escape prevention effect is excellent, the bait slow-release period is long, all components can be quickly disassembled and maintained, and the device is suitable for green prevention and control of sanitary pests in various indoor environments such as families and hospitals.

Description

Technical Field

[0001] A biological trapping device for flies, mosquitoes, and cockroaches. This invention belongs to the field of pest trapping technology, specifically relating to the technical field of biological trapping devices for flies, mosquitoes, and cockroaches. Background Technology

[0002] Cockroaches, mosquitoes, and flies are the three most common indoor pests, not only contaminating food and the environment but also spreading various pathogens and endangering human health. Currently available pest traps generally have the following drawbacks:

[0003] Limited functionality: Most devices can only trap cockroaches or flies, requiring users to purchase and place multiple devices simultaneously, which takes up a lot of space, has high operating costs, and the scattered placement affects the aesthetics of the room.

[0004] Low cockroach trapping efficiency: Traditional sticky cockroach traps rely solely on adhesive to trap cockroaches, making it easy for large cockroaches to break free and escape; some devices with one-way entrances have complex structures, the entrances are easily blocked by debris, and the bait evaporates quickly, resulting in a short effective trapping cycle.

[0005] The safety of mosquito and fly trapping is poor: electric mosquito and fly lamps produce electric sparks and ozone odor when working, posing a fire hazard, and the dead insects after being electrocuted are easily scattered, causing secondary pollution; ordinary sticky mosquito and fly traps are prone to drying out and becoming ineffective, and rely solely on odor to attract insects, resulting in a limited trapping range.

[0006] Mosquitoes and flies easily escape: Some integrated devices lack an effective one-way barrier structure in their mosquito and fly trapping chambers, allowing mosquitoes and flies to easily fly out the same way after entering, resulting in a low trapping rate; some filter structures are poorly designed, causing mosquitoes and flies to easily linger outside the filter and be unable to enter the trapping chamber.

[0007] Inconvenient maintenance: Most existing integrated devices are fixed structures. The entire device needs to be disassembled for bait replacement and pest carcass removal, which is cumbersome and can easily cause pollution to spread. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the existing defects and provide a biological device for trapping flies, mosquitoes and cockroaches, thereby solving the problems of existing devices having single function, low trapping efficiency, poor safety, easy escape of mosquitoes and flies, and inconvenient maintenance.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A biological trapping device for flies, mosquitoes, and cockroaches includes a connecting rod, with a cockroach trapping structure fixedly installed at the bottom end of the connecting rod, and a mosquito and fly trapping structure slidably installed on the connecting rod above the cockroach trapping structure.

[0011] As a preferred embodiment of the present invention, the cockroach trapping structure is a rectangular shell with a cover plate snapped onto the top. A rectangular slot for the cover plate to snap onto the outer side of the cockroach trapping structure is provided. A rectangular opening is provided on the front of the cockroach trapping structure, and a drawer for collecting cockroaches is slidably installed inside the opening. A cockroach sticky board is installed inside the drawer. The cockroach passages are symmetrically distributed on the left and right sides of the cockroach trapping structure.

[0012] In a preferred embodiment of the present invention, the cockroach tunnel is an upwardly inclined square tunnel with a sloping plate at its bottom, the sloping angle of which is set to 10-20°; a rotating shaft is horizontally installed inside the cockroach tunnel above the sloping plate, and a sleeve is movably sleeved on the outside of the rotating shaft. A thin aluminum plate matching the cross-section of the cockroach tunnel is fixedly installed on the side of the sleeve, the thickness of which is set to 0.5-1mm, and through holes are distributed on the thin aluminum plate; a limiting rod is installed inside the cockroach tunnel above the thin aluminum plate, the limiting rod being used to limit the maximum angle at which the thin aluminum plate flips upward.

[0013] As a preferred embodiment of the present invention, a top plate is installed at the top of the cockroach trapping structure, and magnets capable of attracting the cover plate are distributed on the surface of the top plate; a storage cylinder for storing solid bait to attract cockroaches is installed at the center of the magnet, and air vents are distributed on the side of the storage cylinder; a sealing cap is threaded onto the cover plate at the position corresponding to the top of the storage cylinder.

[0014] As a preferred embodiment of the present invention, the mosquito and fly trapping structure includes an installation ring, on the side of which are distributed collars that fit onto a connecting rod. The collars are fixed by two limiting nuts. The bottom end of the installation ring is connected to a bottom tube via multiple connecting plates. A filter screen is installed on the inner wall of the connecting plates. The filter screen is conical with its tip pointing downwards. The tip of the conical filter screen is fixed to the top of the bottom tube, and a closed mosquito and fly trapping cavity is formed between the filter screen and the transparent cover.

[0015] As a preferred embodiment of the present invention, a transparent cover is installed at the bottom end of the mounting ring on the outer side of the connecting plate, and a base plate is threadedly connected to the bottom end of the transparent cover; an annular boss is provided on the upper surface of the base plate, and flypaper is installed on the surface of the boss; the bottom end of the bottom tube is located directly above the boss, and a gap is provided between the two to allow mosquitoes and flies to enter the trapping chamber; a mosquito and fly attractant seat is threadedly connected to the outside of the bottom tube.

[0016] As a preferred embodiment of the present invention, the mosquito and fly attractant is located above the flypaper, and has a liquid storage tank inside. The top of the liquid storage tank is connected to an injection pipe, and a sealing cap is installed on the injection pipe. The side of the mosquito and fly attractant is made of a porous slow-release plate.

[0017] As a preferred embodiment of the present invention, the top of the mounting ring is connected to a top cover by multiple support rods. The top cover can cover the mosquito and fly inlet of the mounting ring, and a trapping lamp is installed at the center of the bottom end of the top cover.

[0018] Compared with the prior art, the beneficial effects of the present invention are: targeting the ground-based activity of cockroaches and the aerial activity of mosquitoes and flies, the upper and lower layered structure is used to simultaneously trap the three pests, eliminating the need to set up multiple separate devices, saving space and operating costs, and the overall structure is compact and aesthetically pleasing.

[0019] The cockroach trapping structure features a rectangular design, allowing it to fit snugly against walls and corners, effectively utilizing indoor corner spaces and avoiding gaps between the cylindrical device and the wall that would allow cockroaches to bypass it, thus further improving the trapping rate.

[0020] It adopts a thin aluminum plate one-way flip structure, which uses the cockroach's own weight to trigger the flip to flip over. After falling into the collection drawer, the flip will automatically reset. With the help of the limit rod, it prevents the flip from flipping back, effectively preventing the cockroach from escaping. The through holes on the thin aluminum plate can ensure that the bait scent is fully released, improving the trapping rate.

[0021] The drawer uses standardized, replaceable cockroach sticky boards, eliminating the need for additional adhesive tape. Installation and replacement are simple; just remove the sticky board and discard it during cleaning to avoid direct contact with dead pests, making it more hygienic.

[0022] The pointed tip of the conical filter is fixed to the top of the bottom tube, forming a completely closed one-way channel. After mosquitoes and flies enter the bottom tube, they can only enter the trapping chamber from the bottom and cannot return upwards. The gap between the bottom of the bottom tube and the protrusion ensures that mosquitoes and flies can pass through smoothly, while preventing them from lingering outside the filter, thus increasing the trapping rate by more than 30%.

[0023] The bottom tube does not pass through the bottom plate, and the bottom end of the transparent cover is completely sealed through the bottom plate to prevent mosquitoes and flies from escaping through the gap between the bottom plate and the bottom tube, while also preventing dust and debris from entering the trapping chamber.

[0024] The mosquito and fly attractant is positioned above the flypaper. The bait scent is directly released into the trapping chamber through a porous slow-release plate, resulting in a higher concentration and more even diffusion, which can quickly attract mosquitoes and flies that have entered the trapping chamber to approach the flypaper. The side is entirely constructed with a porous slow-release plate, which simplifies the production process and extends the slow-release period of the bait.

[0025] The mosquito and fly trapping method combines ultraviolet light attraction with biological bait, without electric shock or chemical spraying, and does not produce odors or harmful gases; the dead insects are concentrated on cockroach sticky boards and flypaper, and will not scatter during cleaning.

[0026] All components are detachable; simply pull out the drawer to replace the cockroach sticky board, unscrew the bottom plate to replace the flypaper, and open the sealing cover to add bait. The mosquito and fly trapping structure can be adjusted in height by sliding up and down along the connecting rod to adapt to the needs of different locations. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the first cross-sectional structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the second cross-sectional structure of the present invention;

[0030] Figure 4 This is a partial enlarged view of end A1 of the present invention;

[0031] 1-Cockroach trapping structure; 2-Connecting rod; 3-Mosquito and fly trapping structure; 4-Cover plate; 5-Slot; 6-Opening; 7-Drawer; 8-Cockroach sticky board; 9-Cockroach tunnel; 10-Sloping plate; 11-Rotating shaft; 12-Sleeve; 13-Thin aluminum plate; 14-Through hole; 15-Limiting rod; 16-Top plate; 17-Magnet; 18-Storage cylinder; 19-Air outlet; 20-Sealing cover; 21-Ring; 22-Limiting nut; 23-Mounting ring; 24-Connecting plate; 25-Bottom tube; 26-Filter screen; 27-Bottom plate; 28-Protrusion; 29-Transparent cover; 30-Mosquito and fly attractant seat; 31-Injection tube; 32-Storage tank; 33-Separator; 34-Porous slow-release plate; 35-Support rod; 36-Top cover; 38-Trap light. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-4 The present invention provides a technical solution:

[0034] A biological trapping device for flies, mosquitoes, and cockroaches is made entirely of food-grade PP plastic. The connecting rod 2 is a cylindrical solid rod with a length that can be set to 50-100cm as needed. The bottom end is fixed to the top center of the cockroach trapping structure 1 by a threaded connection.

[0035] The specific structure of cockroach trap structure 1

[0036] The cockroach trapping structure 1 is a rectangular shell, 18-22cm long, 12-16cm wide, and 10-15cm high. A rectangular slot 5 is provided on the top edge of the shell, and the cover plate 4 is a rectangular plastic plate that matches the shell, with its edge snapped into the slot 5. A circular magnet 17 is embedded in each of the four corners of the top plate 16 at the top of the shell. The magnets 17 are attracted to the four iron pieces on the bottom surface of the cover plate 4, achieving double fixation of the cover plate 4, preventing accidental fall-off, and facilitating quick disassembly.

[0037] A rectangular opening 6 is located in the center of the front of the casing. Drawer 7 is a rectangular drawer that matches opening 6 and slides into opening 6. A handle is provided at the front of drawer 7. A replaceable standardized cockroach sticky board 8 is installed inside drawer 7. The cockroach sticky board 8 is made of a waterproof cardboard base with a strong adhesive layer. Its size matches the internal space of drawer 7 and can be directly placed at the bottom of drawer 7 without additional fixing.

[0038] Three cockroach tunnels 9 are evenly distributed on each of the left and right sides of the drawer 7, for a total of six entrances. Each cockroach tunnel 9 is a square tunnel that slopes upwards, with the outer end opening downwards and the inner end connecting to the inside of the shell. Each cockroach tunnel 9 has a sloping plate 10 at the bottom, with an inclination angle of 15° and a non-slip texture on the surface to facilitate cockroaches climbing in.

[0039] A rotating shaft 11 is horizontally installed near the inner end of the cockroach tunnel 9. Both ends of the shaft 11 are fixed to the inner wall of the tunnel. A plastic sleeve 12 is movably fitted onto the outside of the shaft 11. A thin aluminum plate 13 is glued to the side of the sleeve 12. The dimensions of the thin aluminum plate 13 match the cross-section of the cockroach tunnel 9, with a thickness of 0.8mm and evenly distributed through holes 14 with a diameter of 2mm on its surface. A limiting rod 15 is fixedly installed on the inner wall of the tunnel above the thin aluminum plate 13. The vertical distance between the limiting rod 15 and the rotating shaft 11 is 1cm, allowing the thin aluminum plate 13 to flip upwards at a maximum angle of 30°. When a cockroach climbs onto the thin aluminum plate 13, its own weight causes the plate to flip downwards around the shaft 11 to a horizontal position. The cockroach falls into the drawer 7 below and is stuck to the cockroach trap 8, unable to escape. The thin aluminum plate 13 automatically returns to its original position under its own weight and is blocked by the limiting rod 15, forming a one-way entrance and effectively preventing cockroaches from crawling out of the tunnel.

[0040] A cylindrical storage cylinder 18 is fixedly installed at the center of the top plate 16. The storage cylinder 18 is 5cm high and 3cm in diameter, and is used to hold solid cockroach bait such as cockroach pheromones and boric acid bait. Eight longitudinal air vents 19 are evenly distributed on the side of the storage cylinder 18, through which the bait scent is dispersed into the shell and the cockroach tunnel 9. The top of the storage cylinder 18 extends out of the corresponding through hole on the cover plate 4, and a sealing cap 20 is threaded to the top. The bait can be added or replaced directly by opening the sealing cap 20 without removing the cover plate 4.

[0041] The specific structure of mosquito and fly trapping structure 3

[0042] The mosquito and fly trapping structure 3 is located above the cockroach trapping structure 1 and its height can be adjusted by sliding up and down along the connecting rod 2. The mounting ring 23 is a circular ring with a diameter of 12-18cm. A collar 21 is fixedly connected to the side, and the collar 21 is fitted onto the connecting rod 2. Both the upper and lower ends of the collar 21 are threaded with limit nuts 22. Tightening the two limit nuts 22 can fix the collar 21 at any height on the connecting rod 2, with an adjustment range of 30-80cm from the ground.

[0043] The bottom of the mounting ring 23 is connected to a bottom tube 25 via four evenly distributed arc-shaped connecting plates 24. The bottom tube 25 is a cylindrical tube with a diameter of 5 cm and a height of 6 cm. A conical filter 26 is fixed to the inner wall of the four connecting plates 24. The mesh diameter of the filter 26 is 2 mm. The tip of the conical filter 26 is fixed to the top of the bottom tube 25 by heat fusion bonding, completely sealing the top of the bottom tube 25. The conical filter 26 divides the space below the mounting ring 23 into inner and outer parts, forming a closed mosquito and fly trapping chamber between the outer part and the transparent cover 29.

[0044] A transparent cover 29 is threadedly connected to the bottom end of the mounting ring 23 on the outer side of the connecting plate 24. The transparent cover 29 is a cylindrical transparent PC cover with a height of 15cm, allowing light from the trapping lamp 38 to pass through. A circular base plate 27 is threadedly connected to the bottom end of the transparent cover 29. The base plate 27 is a solid circular plate that completely seals the bottom end of the transparent cover 29. An annular boss 28 is integrally formed at the center of the upper surface of the base plate 27. The boss 28 has a diameter of 7cm and a height of 1cm, and a replaceable circular flypaper is attached to its surface. A 1.5cm gap is provided between the bottom end of the bottom tube 25 and the upper surface of the boss 28, allowing mosquitoes and flies to enter the trapping chamber from inside the bottom tube 25.

[0045] The portion of the bottom tube 25 located inside the transparent cover 29 is threadedly connected to a mosquito and fly attractant seat 30. The mosquito and fly attractant seat 30 is positioned directly above the flypaper, 0.5 cm from the surface of the flypaper. The mosquito and fly attractant seat 30 is an annular shell with an annular liquid storage tank 32 inside, used to hold liquid mosquito and fly bait such as sugar-vinegar solution and mosquito and fly pheromones. The top of the liquid storage tank 32 is connected to an injection tube 31, which extends upward through the gap between the connecting plates 24 to the outside of the mounting ring 23, and is fitted with a rubber sealing cap at the top. The side of the mosquito and fly attractant seat 30 is entirely composed of a porous slow-release plate 34 made of porous ceramic, through which the liquid bait slowly and evenly evaporates into the trapping chamber.

[0046] The top of the mounting ring 23 is connected to a conical top cover 36 via three evenly distributed support rods 35. The diameter of the top cover 36 is larger than that of the mounting ring 23, which can cover the mosquito and fly inlet of the mounting ring 23 to prevent dust and rainwater from entering the device. A 3W ultraviolet trapping lamp 38 with a wavelength of 365nm is installed at the center of the bottom of the top cover 36, which has a strong attraction to mosquitoes and flies.

[0047] How to use and working principle of this device

[0048] Preparation before use: Open the sealing cover 20 of the cockroach trapping structure 1, add solid cockroach bait to the storage cylinder 18, and tighten the sealing cover 20; snap the cover plate 4 into the slot 5 and fix it with the magnet 17. Open the sealing cap of the liquid injection tube 31 of the mosquito and fly attractant 30, add liquid mosquito and fly bait to the liquid storage tank 32, and tighten the sealing cap. Place the cockroach sticky board 8 in the drawer 7, unscrew the bottom plate 27 at the bottom of the transparent cover 29, stick flypaper on the protrusion 28, and tighten the bottom plate 27. Adjust the height of the mosquito and fly trapping structure 3 according to the needs of the place of use, and tighten the limiting nut 22 to fix it. Place the device in indoor corners, kitchens, bathrooms, and other areas where pests are frequently active, and turn on the power of the trapping light 38 to start working.

[0049] Cockroach trapping principle: The scent of the solid bait in the storage cylinder 18 is released into the surrounding environment through the vent 19. Attracted by the scent, cockroaches crawl along the inclined plate 10 into the cockroach tunnel 9. When a cockroach reaches the thin aluminum plate 13, its weight causes the plate to flip downwards, causing the cockroach to fall into the drawer 7 below, where it gets stuck on the cockroach sticky plate 8 and cannot escape. The thin aluminum plate 13 automatically resets under its own weight, and the limiting rod 15 prevents it from flipping excessively upwards, ensuring that subsequent cockroaches can still enter normally.

[0050] Mosquito and fly trapping principle: The ultraviolet light emitted by the trapping lamp 38 attracts mosquitoes and flies to enter the device through the mosquito and fly inlet between the top cover 36 and the mounting ring 23. They then descend along the mounting ring 23 and connecting plate 24 into the bottom tube 25. Because the tip of the conical filter 26 seals the top of the bottom tube 25, the mosquitoes and flies cannot return upwards. They can only fly out through the gap between the bottom end of the bottom tube 25 and the protrusion 28, entering the trapping chamber between the transparent cover 29 and the conical filter 26. After entering the trapping chamber, the mosquitoes and flies are attracted by the bait scent emitted by the mosquito and fly attractant seat 30, moving towards the flypaper and eventually being stuck by the flypaper on the protrusion 28.

[0051] Routine maintenance: When the cockroach sticky board 8 is full of cockroaches, pull out drawer 7, remove the used cockroach sticky board 8 and discard it. Place a new cockroach sticky board 8 in the drawer and push drawer 7 back in. When the flypaper is full of flies and mosquitoes, unscrew the bottom plate 27 at the bottom of the transparent cover 29, replace the flypaper on the protrusion 28, and then tighten the bottom plate 27. When the bait scent becomes weak, open the sealing cap 20 and the sealing cap of the injection tube 31 respectively, and add the corresponding bait.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biological trapping device for flies, mosquitoes, and cockroaches, comprising a connecting rod (2), characterized in that: A cockroach trapping structure (1) is fixedly installed at the bottom of the connecting rod (2), and a mosquito and fly trapping structure (3) is slidably installed on the connecting rod (2) above the cockroach trapping structure (1). The cockroach trapping structure (1) is a rectangular shell with multiple cockroach channels (9) distributed on the side. Inside, a collection drawer (7) with a cockroach sticky board (8) is slidably installed, and a storage cylinder (18) for storing solid cockroach bait is provided on the top. The mosquito and fly trapping structure (3) includes a collar (21) sleeved on the connecting rod (2). The collar (21) is fixed by a limiting nut (22). An installation ring (23) is connected to the side of the collar (21). A transparent cover (29) is provided at the bottom of the installation ring (23). A conical filter (26) and a flypaper collection assembly are provided inside the transparent cover (29). A trapping lamp (38) is installed at the top of the installation ring (23). The tip of the conical filter (26) is fixed to the top of the bottom tube (25). The bottom of the bottom tube (25) is located above the boss (28). A gap is provided between the two. Mosquitoes and flies enter the closed space between the transparent cover (29) and the conical filter (26) through the bottom of the bottom tube (25).

2. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 1, characterized in that: The top of the cockroach trapping structure (1) is fitted with a cover plate (4), and a rectangular slot (5) for the cover plate (4) to be fitted is provided on the outside of the cockroach trapping structure (1); a rectangular opening (6) is provided on the front of the cockroach trapping structure (1), and the drawer (7) is slidably installed inside the opening (6), and a cockroach sticky board (8) is installed inside the drawer (7); the cockroach passages (9) are symmetrically distributed on the left and right sides of the cockroach trapping structure (1).

3. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 2, characterized in that: The cockroach tunnel (9) is a square tunnel with an upward inclination. The bottom end of the tunnel is provided with an inclined plate (10) with an inclination angle of 10-20°. A rotating shaft (11) is horizontally installed inside the cockroach tunnel (9) above the inclined plate (10). A sleeve (12) is movably sleeved on the outside of the rotating shaft (11). A thin aluminum plate (13) matching the cross-section of the cockroach tunnel (9) is fixedly installed on the side of the sleeve (12). The thickness of the thin aluminum plate (13) is 0.5-1mm, and through holes (14) are evenly distributed on its surface. A limiting rod (15) is fixedly installed on the inner wall of the cockroach tunnel (9) above the thin aluminum plate (13). The limiting rod (15) is used to limit the maximum angle at which the thin aluminum plate (13) flips upward.

4. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 2, characterized in that: The cockroach trapping structure (1) has a top plate (16) fixedly installed at the top inside. The surface of the top plate (16) is embedded with a plurality of magnets (17) for adsorbing the cover plate (4). The storage cylinder (18) is fixedly installed at the center of the top plate (16). The side of the storage cylinder (18) is evenly distributed with longitudinal air outlet grooves (19). The top of the storage cylinder (18) extends out of the cover plate (4) and is threadedly connected with a sealing cap (20).

5. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 1, characterized in that: Both ends of the collar (21) are threaded with limit nuts (22), and the collar (21) is fixed at any height of the connecting rod (2) by the two limit nuts (22); the bottom end of the mounting ring (23) is connected to the bottom tube (25) through multiple evenly distributed connecting plates (24), and a conical filter (26) is fixedly installed on the inner wall of the connecting plates (24). The tip of the conical filter (26) is fixed to the top of the bottom tube (25), and a mosquito and fly trapping cavity is formed between the conical filter (26) and the transparent cover (29).

6. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 5, characterized in that: The transparent cover (29) is threaded to the bottom end of the mounting ring (23) on the outside of the connecting plate (24), and the bottom end of the transparent cover (29) is threaded to the bottom plate (27); the upper surface of the bottom plate (27) is provided with an annular boss (28), the flypaper is pasted on the surface of the boss (28), the bottom end of the bottom tube (25) is located directly above the boss (28), and a gap of 1-2cm is provided between the two for mosquitoes and flies to enter the trapping chamber.

7. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 5, characterized in that: The bottom tube (25) is externally threaded with a mosquito and fly attractant seat (30), which is located above the flypaper. The mosquito and fly attractant seat (30) has an annular liquid storage tank (32) for storing liquid mosquito and fly bait inside. The top of the liquid storage tank (32) is connected to an injection pipe (31), and a sealing cap is installed at the top of the injection pipe (31). The side of the mosquito and fly attractant seat (30) is made of a porous slow-release plate (34).

8. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 1, characterized in that: The top of the mounting ring (23) is connected to a top cover (36) by multiple evenly distributed support rods (35). The diameter of the top cover (36) is larger than that of the mounting ring (23) and is used to cover the mosquito and fly inlet of the mounting ring (23). The trapping lamp (38) is an ultraviolet trapping lamp, which is fixedly installed at the center of the bottom end of the top cover (36).

9. The biological trapping device for flies, mosquitoes, and cockroaches according to claim 1, characterized in that: The main bodies of the cockroach trapping structure (1), the connecting rod (2), and the mosquito and fly trapping structure (3) are all made of food-grade PP plastic, the transparent cover (29) is made of transparent PC material, and the porous slow-release plate (34) is made of porous ceramic material.

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