Tomato leaf miner prevention and control device and method thereof

Abstract

The invention provides a tomato leaf miner prevention and control device and method, and relates to the technical field of leaf miner prevention and control, the tomato leaf miner prevention and control device comprises an inner sleeve fixedly mounted in a plurality of ground pipes, a plurality of self-locking grooves are formed in the side wall of the inner sleeve, and a friction block is slidably connected in each self-locking groove; a friction rod is coaxially installed in the inner sleeve, the side walls of the multiple friction blocks abut against the friction rod, and multiple elastic rods are installed at the lower ends of the friction blocks at equal intervals. The insect-proof net is rapidly installed and firmly fixed, the device is of an inserted ground pipe structure, the whole system can be stably arranged in soil, reliable support is provided for follow-up operation, and a precise self-locking mechanism in the inner sleeve adopts the principle that a friction block and a friction rod work cooperatively.

Description

Technical Field

[0001] The present invention relates to the technical field of tomato leafminer prevention and control, and more particularly to a tomato leafminer prevention and control device and method. Background Art

[0002] In modern facility agriculture, tomato is an important economic crop. The prevention and control of pests and diseases during the seedling stage is directly related to the success or failure of later production. Leafminer, one of the main pests of tomato seedlings, has the characteristics of rapid reproduction, strong concealment, and serious damage. Once an outbreak occurs, it will cause the death of a large number of seedlings, resulting in serious economic losses. At present, physical isolation technology of insect nets is widely used in agricultural production practice as the main means of controlling leafminers in tomato seedling areas. Compared with chemical pesticide control, this method has the advantages of no residue, environmental protection, safety, and long-term durability. However, existing insect net application equipment has technical defects, mainly manifested in unreasonable fixing mechanism design and inefficient tensioning system. Traditional insect net installation usually relies on manual compaction of the net edge with soil or fixing with simple clamps. This method is not only labor-intensive but also unstable in fixing effect. It often loosens and falls off due to wind, sun and rain. At the same time, the existing equipment lacks an effective tensioning mechanism, which cannot ensure that the insect net always maintains appropriate tension during use. The loose net body not only affects the coverage effect, but also easily forms a channel for pest invasion.

[0003] These technical limitations have produced a series of chain reactions in actual production applications, seriously affecting the insect control efficiency and operational convenience in tomato seedling areas. First, the unstable fixing method requires agricultural workers to frequently check and maintain the status of the insect-proof net, increasing labor input and time costs; second, the manual installation and adjustment of the insect-proof net is cumbersome and time-consuming, especially in large-scale seedling areas, where it often requires the collaboration of multiple people to complete a complete covering operation, reducing production efficiency; third, the inability to accurately control the tension of the net leads to uneven protection. Some areas may be too tight, causing damage to the net, while other areas may be too loose, forming weak points of protection. Summary of the Invention

[0004] (1) Technical problems solved In response to the problems existing in the prior art, the present invention provides a tomato leafminer prevention and control device and method thereof to solve the technical problems mentioned in the background technology.

[0005] (2) Technical solution To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tomato leafminer control device and method, comprising a plurality of ground tubes inserted into the soil; further comprising a fixing mechanism, wherein the fixing mechanism comprises an inner sleeve fixedly installed in the plurality of ground tubes, a plurality of self-locking grooves being provided on the side walls of the inner sleeve, a friction block being slidably connected in each of the self-locking grooves, a friction rod being coaxially installed in the inner sleeve, and the side walls of the plurality of friction blocks respectively abut against the friction rod, a plurality of elastic rods being equidistantly installed at the lower end of the friction block, the plurality of elastic rods abut against the side walls of the friction rod, and a stop block being installed on the friction block; further comprising a tensioning mechanism, the tensioning mechanism comprising an outer wheel, a plurality of arc springs being equidistantly installed on the inner wall of the outer wheel, an inner sleeve being installed in the plurality of arc springs, the inner sleeve and the outer wheel being coaxially arranged, and friction grooves being equidistantly provided on the outer wheel.

[0006] Preferably, the fixing mechanism also includes a vertical groove opened on the plurality of friction blocks, a telescopic rod is slidably connected in the vertical groove, a synchronization block is installed on the telescopic rod, and the plurality of synchronization blocks abut against the elastic rod. This synchronous unlocking structure design creates an efficient and convenient quick release system, and the sliding connection between the vertical groove and the telescopic rod provides a smooth motion trajectory for the unlocking operation.

[0007] Preferably, a plurality of top grooves are provided on the upper end surface of the inner sleeve at equal intervals, and a plurality of top grooves are slidably connected with push rods, and a plurality of the push rods are in contact with the telescopic rods, and a plurality of pressure plates are installed on the push rods. This top operating mechanism constructs a single-point control system, and the evenly distributed design of the plurality of top grooves and push rods ensures the balanced transmission of downward force.

[0008] Preferably, a hexagonal rod is installed at the lower end of the friction rod, and a hexagonal groove is opened at the lower end of the inner sleeve. The hexagonal rod is slidingly connected in the hexagonal groove. This anti-rotation guide structure forms a precise linear motion control system. The matching design of the hexagonal rod and the hexagonal groove ensures that the friction rod can only move axially and not rotate, thereby ensuring the precise alignment and reliable operation of the self-locking mechanism.

[0009] Preferably, a handle is coaxially mounted on the friction rod, two transverse rods are equidistantly mounted on the friction rod, and a rotating shaft is mounted between the two transverse rods, and the inner sleeve is rotatably connected to the rotating shaft. The coaxial mounting of the handle provides an intuitive operating interface, which facilitates the application and control of axial force, and the equidistant arrangement of the two transverse rods forms a stable torque transmission framework.

[0010] Preferably, the friction rod and the hexagonal rod are respectively provided with rounded corners. This structural optimization design forms a smooth force transmission transition zone. The rounded corner structure eliminates the sharp stress concentration during the contact process between the friction rod and the elastic rod, ensuring uniform force and extended component life, while reducing operating resistance and wear rate.

[0011] Preferably, the tensioning mechanism also includes a plurality of follower rods symmetrically installed on both sides of the inner sleeve, and two follower wheels are installed on the plurality of follower rods, a plurality of follower strips are installed at equal intervals on the outer wall of the follower wheel, and a plurality of raised strips are installed at equal intervals on the inner wall of the outer wheel. This precision limit system constructs a reliable rotation locking mechanism. The symmetrically installed follower rods ensure the balanced transmission of force and the stability of the structure. The contact design between the follower wheel and the outer wheel reduces friction and improves movement accuracy. The intermittent meshing structure of the follower strip and the raised strip creates a multi-point precise positioning capability.

[0012] Preferably, a flat plate is installed on each of the ground tubes, and a plurality of support springs are installed on each of the flat plates. This basic support structure forms a stable installation base and a flexible adjustment system. The flat plate increases the contact area with the ground, improves the stability and anti-overturning ability of the entire device, and prevents tilting and displacement in strong winds or during operation.

[0013] Preferably, a top bar is installed on the support spring, and an insect-proof net is installed on the top bar, side bars are installed on the side walls of the insect-proof net, and the outer wheel is pressed on the side bars. This three-dimensional protective structure creates a comprehensive tomato seedling protection system.

[0014] The present invention provides a method for preventing and controlling tomato leafminer, comprising the following steps: First, operators insert multiple ground tubes into the soil of the tomato seedling area to form a stable support base. Next, top bars connected to support springs are placed above the tomato seedlings, forming the skeleton structure of the protective space. Next, the insect net is laid flat on top of the top bars, covering the entire area to be protected. The lateral bars on both sides of the insect net are ensured to be properly positioned to prepare for subsequent fixing and tensioning operations. This initial installation method allows the insect net to form a reasonable spatial structure, ensuring comprehensive coverage of the seedlings without directly contacting the plants and causing mechanical damage. After installing the insect screen, the operator pushes down on the friction rods to press the outer wheels against the lateral strips on both sides of the insect screen, initially securing the screen. As the downward pressure continues, the friction rods slide into the inner sleeves, and the rounded corners come into contact with multiple elastic rods, causing them to stretch outward. When the pressure exceeds a certain threshold, the elastic rods and the friction rods form a contact state exceeding the friction angle, triggering the self-locking mechanism. At this time, the pressure is released, and the outer wheels tend to move upward due to the force of the arc springs. However, because the friction blocks are tightly fitted with the friction rods and form a self-locking effect in the self-locking grooves, the insect screen is firmly fixed in the set position without the need for additional locking devices or operations. When the insect-proof net needs to be precisely tensioned, the operator first pushes the friction rod downward to a specific position to release the following bar and the raised bar from the limit state, but maintains the pressure of the outer wheel on the lateral bar. Then, the lateral bar is driven outward by rotating the outer wheel to achieve uniform tensioning of the insect-proof net. After tensioning to the ideal state, the friction rod is pushed downward again to press the following wheel on the inner wall of the outer wheel, and the following bar is re-engaged in the raised bar to form a limit lock, fixing the current tensioning state. When the insect-proof net needs to be removed or adjusted, it is only necessary to press the pressure plate downward to trigger the linkage mechanism of the top rod, telescopic rod and synchronization block, and release the self-locking state between the elastic rod and the friction rod. The friction rod can be easily removed, completing the unlocking process of the entire system and realizing convenient recovery and redeployment of the insect-proof net.

[0015] (3) Beneficial effects Compared with the prior art, the present invention provides a device and method for controlling tomato leafminer, which has the following beneficial effects: The most significant technological breakthrough of this prevention and control device lies in its innovative fixing mechanism design. Through the combination of a unique internal sleeve and a friction self-locking system, the insect-proof net can be quickly installed and firmly fixed. The equipment adopts an insertable ground pipe structure, which enables the entire system to be firmly in the soil, providing reliable support for subsequent operations. The precise self-locking mechanism in the internal sleeve adopts the principle of coordinated work between the friction block and the friction rod. When the operator pushes the friction rod downward, the interaction between the friction rod and the elastic rod can produce a self-locking effect exceeding the friction angle at a specific position. This design enables the insect-proof net to automatically remain in a tensioned state after installation, without the need for additional locking operations, thus simplifying the workflow.

[0016] The fixing system of the device is also designed with a convenient unlocking mechanism. Through the linkage design of the pressure plate and the top rod, the operator only needs to press the pressure plate down to trigger the coordinated movement of the telescopic rod and the synchronization block, and easily release the friction self-locking state. This one-step unlocking design improves the convenience of insect-proof net recovery and is particularly suitable for seasonal protection needs. Compared with the traditional method of relying on manual compaction of the net edge with soil or fixing it with simple clamps, this device not only reduces labor intensity, but also significantly improves the stability of the fixing effect. Even in windy or rainy environments, the system can remain firm and reliable, avoiding the common loosening and falling problems of traditional methods, thereby ensuring the continuous protection effectiveness of the insect-proof net.

[0017] Another technological innovation of the device lies in its tensioning system. Through the combined design of the outer wheel and the arc spring, precise tensioning and adjustment of the insect-proof net is achieved. The equipment adopts a coaxial inner sleeve and outer wheel structure, and provides continuous and stable tension through the arc spring to ensure that the insect-proof net always maintains the proper tightness. This design solves the technical problems of uneven tension and local relaxation in the application of traditional insect-proof nets, and improves the protection effect.

[0018] In summary, this tomato leafminer control device provides a protection solution for tomato seedling areas that is both efficient, reliable and convenient. It not only solves the problems of difficult fixation and insufficient tension in traditional insect-proof net applications, but also improves work efficiency by simplifying the operating process, lowers the technical threshold, and enables ordinary agricultural workers to easily master and use it. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a tomato leafminer control device and method according to the present invention; Figure 2 Schematic diagram of the structure of the top bar and the support spring in the present invention; Figure 3 Schematic diagram of the structure of the inner sleeve and the friction rod in the present invention; Figure 4 This is a schematic structural diagram of the outer wheel in the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the inner sleeve and the friction rod in the present invention; Figure 6 Schematic diagram of the structure of the pressure plate and friction block in the present invention; Figure 7 Schematic diagram of the structure of the friction rod and friction block in the present invention; Figure 8 Schematic diagram of the exploded cross-sectional structure of the telescopic rod and the friction block in the present invention; Figure 9 Schematic diagram of the structure of the pressure plate and telescopic rod in the present invention; Figure 10It is a structural schematic diagram of the friction block and the elastic rod in the present invention.

[0020] In the figure: 11, ground tube; 21, inner sleeve; 22, self-locking groove; 23, friction block; 24, friction rod; 25, elastic rod; 26, vertical groove; 27, telescopic rod; 28, synchronization block; 29, top groove; 31, outer wheel; 32, arc spring; 33, friction groove; 34, follower rod; 35, follower wheel; 36, follower bar; 37, raised bar; 38, flat plate; 39, support spring; 210, top rod; 211, pressure plate; 212, hexagonal rod; 213, hexagonal groove; 214, handle; 215, horizontal rod; 216, rotating shaft; 217, rounded corner; 310, top bar; 311, insect net; 312, side bar; 313, stop block. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0023] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0024] See also Figures 1 to 10, a tomato leafminer control device and method thereof, includes multiple ground tubes 11 inserted into the soil; also includes a fixing mechanism, the fixing mechanism includes an internal sleeve 21 fixedly installed in the multiple ground tubes 11, and a plurality of self-locking grooves 22 are opened on the side wall of the internal sleeve 21, and a friction block 23 is slidably connected in each self-locking groove 22, and a friction rod 24 is coaxially installed in the internal sleeve 21, and the side walls of the multiple friction blocks 23 respectively abut against the friction rod 24, and a plurality of elastic rods 25 are evenly spaced at the lower end of the friction block 23, and the multiple elastic rods 25 abut against the side wall of the friction rod 24, and a stop block 313 is installed on the friction block 23, and the fixing mechanism also includes a vertical groove 26 opened on the multiple friction blocks 23, and a telescopic rod 27 is slidably connected in the vertical groove 26, and a telescopic rod 27 is installed on the telescopic rod 27 There is a synchronization block 28, and multiple synchronization blocks 28 abut against the elastic rod 25. Multiple top grooves 29 are opened at equal intervals on the upper end surface of the inner sleeve 21. Multiple top grooves 29 are slidably connected with push rods 210, and multiple push rods 210 abut against the telescopic rod 27. Multiple push rods 210 are installed with pressure plates 211. The lower end of the friction rod 24 is installed with a hexagonal rod 212, and the lower end of the inner sleeve 21 is opened with a hexagonal groove 213. The hexagonal rod 212 is limitedly slidably connected in the hexagonal groove 213. A handle 214 is coaxially installed on the friction rod 24. Two transverse rods 215 are installed at equal intervals on the friction rod 24, and a rotating shaft 216 is installed between the two transverse rods 215. The inner sleeve 21 is rotatably connected to the rotating shaft 216, and rounded corners 217 are respectively opened on the friction rod 24 and the hexagonal rod 212.

[0025] When protecting tomato seedlings, it is first necessary to insert multiple ground tubes 11 into the corresponding soil respectively. Since top strips 310 are installed between two ground tubes 11 through support springs 39, multiple top strips 310 are placed on the tomato seedlings respectively, and then the insect-proof net 311 is placed on the multiple top strips 310, and the outer wheel 31 is pressed on the side strips 312 on both sides of the insect-proof net 311, thereby ensuring that the insect-proof net 311 is conveniently fixed.

[0026] When the outer wheel 31 needs to be pressed against the lateral strip 312, since an inner sleeve 21 is installed in each ground tube 11, and the inner sleeve 21 is rotatably connected to the rotating shaft 216, the outer wheel 31 can be pressed downward as the friction rod 24 is pushed downward, thereby ensuring the fixation of the lateral strip 312. As the friction rod 24 is continuously pressed downward, it slides toward the inner sleeve 21, and the hexagonal rod 212 is limitedly slidably connected to the hexagonal groove 213. At this time, the stop blocks 313 on the multiple friction blocks 23 are pressed against the self-locking groove 22, and in this position, the diameter between the multiple friction blocks 23 is slightly larger than the diameter of the friction rod 24, so that the friction rod 24 can be inserted between the multiple friction blocks 23. As the rounded corners 217 continue to be pushed downward, they will press against the multiple elastic rods 25, and the lengths of the multiple elastic rods 25 are slightly inserted into the friction rod 24. Then, the rounded corners 217 abut against the multiple elastic rods 25. Since the stop rod abuts against the self-locking groove 22, the friction block 23 stops moving, and then the rounded corners 217 abut against the multiple elastic rods 25. When the outer wheel 31 is pressed against the side bar 312, the outer wheel 31 is pressed against the side bar 312, thereby completing the fixing process. After the fixing is completed, the arc spring 32 is compressed and there is an upward pushing force, and the friction rod 24 has a tendency to move upward. Since the multiple elastic rods 25 exceed the friction angle, the friction block 23 is driven to move upward, and then the friction block 23 is driven to move upward accordingly. At this time, the friction block 23 is attached to the side wall of the friction rod 24, so that the friction block 23 is tightly attached to the friction rod 24, so that it moves upward after the friction rod 24 moves upward. Since the friction block 23 slides along the self-locking groove 22, it produces a self-locking effect, thereby ensuring the fixing effect, which is more convenient during installation. Therefore, the insect-proof net 311 can be easily fixed and recovered, thereby ensuring the prevention and control effect.

[0027] When it is necessary to unlock, the pressure plate 211 is pushed downward so that the multiple push rods 210 are pressed on the telescopic rod 27, and then the telescopic rod 27 pushes the synchronization block 28 to press on the multiple elastic rods 25, thereby unlocking the elastic rod 25 and the friction rod 24. Then the friction rod 24 can be pulled out upward, thereby completing the unlocking process.

[0028] The tensioning mechanism includes an outer wheel 31, on the inner wall of the outer wheel 31 are installed a plurality of arc springs 32 at equal intervals, and an inner sleeve 21 is installed in the plurality of arc springs 32, and the inner sleeve 21 and the outer wheel 31 are coaxially arranged, and friction grooves 33 are provided on the outer wheel 31 at equal intervals. The tensioning mechanism also includes a plurality of follower rods 34 symmetrically installed on both sides of the inner sleeve 21, and two follower wheels 35 are installed on the plurality of follower rods 34, a plurality of follower bars 36 are installed at equal intervals on the outer wall of the follower wheel 35, and a plurality of raised bars 37 are installed at equal intervals on the inner wall of the outer wheel 31, a flat disk 38 is installed on each ground tube 11, and a plurality of support springs 39 are installed on each flat disk 38, a top bar 310 is installed on the support spring 39, and an insect-proof net 311 is fitted on the top bar 310, and a side bar 312 is installed on the side wall of the insect-proof net 311, and the outer wheel 31 is pressed on the side bar 312.

[0029] When the cam 31 is in the unlock state, the outer wheel 31 is locked and the locking cam 31 is unlocked, so that the cam 31 is unlocked and the locking cam 31 is unlocked.

[0030] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tomato leafminer control device and method, comprising a plurality of ground tubes (11) inserted into the soil; wherein: The invention also includes a fixing mechanism, wherein the fixing mechanism includes an inner sleeve (21) fixedly installed in the plurality of ground pipes (11), a plurality of self-locking grooves (22) are provided on the side wall of the inner sleeve (21), a friction block (23) is slidably connected in each of the self-locking grooves (22), a friction rod (24) is coaxially installed in the inner sleeve (21), and the side walls of the plurality of friction blocks (23) respectively abut against the friction rod (24), and a plurality of elastic rods (25) are evenly spaced and installed at the lower end of the friction block (23). ), multiple elastic rods (25) abut against the side wall of the friction rod (24), and a stop block (313) is installed on the friction block (23); it also includes a tensioning mechanism, the tensioning mechanism includes an outer wheel (31), multiple arc springs (32) are evenly spaced on the inner wall of the outer wheel (31), and an inner sleeve (21) is installed in the multiple arc springs (32), and the inner sleeve (21) and the outer wheel (31) are coaxially arranged, and friction grooves (33) are evenly spaced on the outer wheel (31).

2. The tomato leafminer control device according to claim 1, characterized in that: The fixing mechanism further comprises a vertical groove (26) formed on the plurality of friction blocks (23), a telescopic rod (27) being slidably connected in the vertical groove (26), a synchronization block (28) being mounted on the telescopic rod (27), and the plurality of synchronization blocks (28) being in contact with the elastic rod (25).

3. The tomato leafminer control device according to claim 2, characterized in that: A plurality of top grooves (29) are formed at equal intervals on the upper end surface of the inner sleeve (21), and a plurality of top grooves (29) are slidably connected with a push rod (210), and the plurality of push rods (210) are in contact with the telescopic rod (27), and a pressure plate (211) is installed on the plurality of push rods (210).

4. The tomato leafminer control device according to claim 3, characterized in that: A hexagonal rod (212) is installed at the lower end of the friction rod (24), a hexagonal slot (213) is provided at the lower end of the inner sleeve (21), and the hexagonal rod (212) is limitedly slidably connected in the hexagonal slot (213).

5. The tomato leafminer control device according to claim 4, characterized in that: A handle (214) is coaxially mounted on the friction rod (24), two transverse rods (215) are evenly spaced and mounted on the friction rod (24), and a rotating shaft (216) is mounted between the two transverse rods (215), and the inner sleeve (21) is rotatably connected to the rotating shaft (216).

6. The tomato leafminer control device according to claim 5, characterized in that: The friction rod (24) and the hexagonal rod (212) are respectively provided with rounded corners (217).

7. The tomato leafminer control device according to claim 5, characterized in that: The tensioning mechanism further comprises a plurality of follower rods (34) symmetrically mounted on both sides of the inner sleeve (21), and two follower wheels (35) are mounted on the plurality of follower rods (34), a plurality of follower strips (36) are mounted at equal intervals on the outer wall of the follower wheel (35), and a plurality of raised strips (37) are mounted at equal intervals on the inner wall of the outer wheel (31).

8. The tomato leafminer control device according to claim 7, characterized in that: A plane disc (38) is mounted on each of the ground pipes (11), and a plurality of support springs (39) are mounted on each of the plane discs (38).

9. The tomato leafminer control device according to claim 8, characterized in that: A top strip (310) is mounted on the support spring (39), and an insect-proof net (311) is fitted on the top strip (310). Side strips (312) are mounted on the side walls of the insect-proof net (311), and the outer wheel (31) is pressed against the side strips (312).

10. A method for controlling tomato leafminer, using the method for controlling tomato leafminer according to claim 9, characterized in that: The following steps are involved: First, the operator inserts a plurality of ground tubes (11) into the soil of the tomato seedling raising area to form a stable support foundation. Subsequently, the top bar (310) connected to the support spring (39) is placed above the tomato seedling to build a skeleton structure of the protective space. Then, the insect-proof net (311) is laid flat on the top bar (310) to cover the entire area to be protected, and ensures that the lateral bars (312) on both sides of the insect-proof net (311) are in appropriate positions to prepare for subsequent fixing and tensioning operations. This initial installation method enables the insect-proof net (311) to form a reasonable spatial structure, which not only ensures comprehensive coverage of the seedlings, but also does not directly contact the plants to cause mechanical damage. After the insect-proof net (311) is installed, the operator pushes the friction rod (24) downward to press the outer wheel (31) onto the lateral strips (312) on both sides of the insect-proof net (311), thereby preliminarily completing the fixing of the insect-proof net (311). As the downward pressure is continued, the friction rod (24) enters the inner sleeve (21) and slides, and the rounded corner (217) part contacts the multiple elastic rods (25) and causes them to stretch outward. When the pressure exceeds a specific threshold, a contact state exceeding the friction angle is formed between the elastic rod (25) and the friction rod (24), triggering the self-locking mechanism. At this time, the pressure is released, and the outer wheel (31) tends to move upward due to the force of the arc spring (32). However, since the friction block (23) is tightly fitted with the friction rod (24) and forms a self-locking effect in the self-locking groove (22), the insect-proof net (311) is firmly fixed in the set position without the need for additional locking devices or operations. When the insect-proof net (311) needs to be precisely tensioned, the operator first pushes the friction rod (24) downward to a specific position, so that the follower bar (36) and the raised bar (37) are out of the limited state, but the pressure of the outer wheel (31) on the lateral bar (312) is maintained. Then, the outer wheel (31) is rotated to drive the lateral bar (312) to move outward to achieve uniform tensioning of the insect-proof net (311). After tensioning to the ideal state, the friction rod (24) is pushed downward again to press the follower wheel (35) into the outer wheel (31). On the wall, the follower bar (36) is re-engaged in the raised bar (37) to form a limit lock, fixing the current tension state. When it is necessary to remove or adjust the insect-proof net (311), it is only necessary to press the pressure plate (211) downward to trigger the linkage mechanism of the top rod (210), the telescopic rod (27) and the synchronous block (28), and release the self-locking state between the elastic rod (25) and the friction rod (24). The friction rod (24) can be easily removed, completing the unlocking process of the entire system, and realizing the convenient recovery and redeployment of the insect-proof net (311).

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