Agricultural plant protection device

Abstract

The utility model provides an agronomy plant protection device which comprises a support assembly and a protection mechanism, and the support assembly comprises a first frame plate, a second clamping plate, two supporting frames and a plurality of anchor piles; wherein the second clamping plate is arranged on one side of the first frame plate, the two supporting frames are fixedly connected to the bottom of the first frame plate and the bottom of the second clamping plate respectively, the anchoring piles are fixedly connected to the bottoms of the two supporting frames respectively, and the protection mechanism is arranged between the first frame plate and the second clamping plate. A winding mechanism is mounted in the first frame plate; the protection mechanism is pulled out of the first frame plate through the winding mechanism, so that the overall coverage range of the device can be controlled by adjusting the pull-out length of the protection mechanism according to actual requirements, and plant protection requirements in different ranges can be met; and the protection mechanism can be directly rolled in the first frame plate by utilizing the rolling mechanism, so that the folding and unfolding operation is more convenient and quicker.

Description

Technical Field

[0001] The utility model relates to a plant protection device, in particular to an agricultural plant protection device, belonging to the technical field of plant protection. Background Art

[0002] Agronomic plant protection is an important branch of agronomy. It focuses on the research and application of various protective measures to prevent plants from being damaged by pests, diseases, weeds, and other biological and natural factors. Strong winds, heavy rains, hail, etc. are common natural disasters in the growth process of plants. Their impact on plants is usually negative, and sometimes even catastrophic. Especially when trial planting some precious plants, it is very easy for the trial planting to fail due to the impact of natural disasters. In the process of plant maturation, they are also susceptible to bird attacks.

[0003] Patent document CN217850511U discloses a novel agricultural plant protection device, including a support frame, a pin, a protective net cover and a convenient folding and unfolding mechanism. The utility model sets a convenient folding and unfolding mechanism on the surface of the support frame, separates the first chain tooth bar from the second chain tooth bar by a pull head, and then splits the protective net cover into a side net and a top net, then removes the rope from the hook to release the fixation of the end of the side net, then folds the top net to the side of the side net, and then drives the rotating shaft to rotate by the rotary handle, so that the rotating shaft rolls the side net and the top net together into the inner side of the winding drum through the through slot, so that the protective net cover can be properly stored, which is more convenient for transportation and storage, and provides convenience for the staff.

[0004] However, although the device can provide all-round protection for plants and has a storage function, its overall structure is rectangular. When in use, the mesh structure needs to be fixed on the four sides and top of the rectangular frame. The folding and unfolding operation is still relatively inconvenient. In addition, due to the limitation of the rectangular frame, the overall coverage of the device is limited and cannot be adjusted according to actual needs. Therefore, an agricultural plant protection device is proposed. Utility Model Content

[0005] In view of this, the utility model provides an agricultural plant protection device to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial choice.

[0006] The technical solution of the embodiment of the utility model is implemented as follows: an agricultural plant protection device includes a bracket assembly and a protection mechanism, wherein the bracket assembly includes a first frame plate, a second clamping plate, two support frames and a plurality of anchor piles;

[0007] Wherein, the second clamping plate is arranged on one side of the first frame plate, the two support frames are fixedly connected to the bottom of the first frame plate and the second clamping plate respectively, a plurality of anchor piles are fixedly connected to the bottom of the two support frames respectively, the protection mechanism is arranged between the first frame plate and the second clamping plate, a winding mechanism is installed inside the first frame plate, an angle adjustment mechanism is arranged between the winding mechanism and the first frame plate, and a locking control mechanism is arranged inside the winding mechanism;

[0008] The protective mechanism is used to connect the first frame plate and the second clamping plate and to shield and protect the plants; the protective mechanism includes a central light-transmitting net, two side light-transmitting nets, two elastic connecting nets and two zippers;

[0009] Wherein, two side light-transmitting nets are arranged on both sides of the central light-transmitting net, the two elastic connecting nets are respectively fixedly connected to the adjacent sides of the two side light-transmitting nets, and the two zippers are connected between the two elastic connecting nets and the central light-transmitting net;

[0010] Wherein, the reeling mechanism is used to reel the protection mechanism;

[0011] The angle adjustment mechanism is used to cooperate with the reeling mechanism to adjust the overall shape of the protection mechanism, so as to protect the plant from the side by changing the shape of the protection mechanism;

[0012] Wherein, the locking control mechanism is used to support the inside of the winding mechanism by screwing.

[0013] Further preferably, the winding mechanism comprises a central winding roller, two side winding rollers and a first rotating disk;

[0014] Among them, the two side winding rollers are hinged at the two ends of the central winding roller, and the outer side walls of the central winding roller are rotatably connected to the inner side walls of the first frame plate through bearings, one end of the central light-transmitting net is wound around the outer side wall of the central winding roller, and one end of the two side light-transmitting nets and the elastic connecting net are both wound around the outer side walls of the side winding roller.

[0015] Further preferably, the angle adjustment mechanism comprises two internally threaded knobs, two arc-shaped slide grooves, two threaded columns and two support rings;

[0016] Among them, the two support rings are rotatably connected to one side of the outer wall of the two side winding rollers through bearings, one end of the two threaded columns are fixedly connected to the outer walls of the two support rings, the two arc-shaped slide grooves are opened on one side of the first frame plate, and the inner walls of the two internal threaded knobs are threadedly connected to the outer walls of one end of the two threaded columns.

[0017] Further preferably, the locking control mechanism comprises a second rotating disk, three flexible connecting rods, two rigid supporting rods and a spring;

[0018] Among them, the outer wall of the second turntable is threadedly connected to the inner wall of one of the side winding rollers, the two rigid support rods are respectively fixedly connected to one end of the three flexible connecting rods adjacent to each other, the two rigid support rods are respectively located at the connection between the two side winding rollers and the center winding roller, one end of one flexible connecting rod is rotatably connected to one end of the second turntable, one end of the spring is fixedly connected to one end of the other flexible connecting rod, and the other end of the spring is fixedly connected to the inner wall of the other side winding roller.

[0019] Further preferably, the inner side walls of the two support frames are rotatably connected to two threaded shafts, the outer side walls of the two threaded shafts are threadedly connected to two internally threaded sleeves, and the tops of the two internally threaded sleeves are respectively fixedly connected to the tops of the inner side walls of the first frame plate and the second clamping plate.

[0020] Further preferably, two guide rods are symmetrically fixedly connected to the upper surfaces of the two support frames, and the outer side walls of the guide rods are slidably connected to the inner side walls of the first frame plate and the second clamping plate.

[0021] Further preferably, a handle is fixedly connected to the top of one side of the first frame plate and the second clamping plate.

[0022] Further preferably, one end of the central light-transmitting net and the two side light-transmitting nets are fixedly connected to a magnetic attraction plate, and one side of the inner side wall of the second clamping plate is evenly fixedly connected to a magnetic strip.

[0023] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0024] 1. The utility model utilizes a reeling mechanism to pull the protective mechanism out of the first frame plate, so as to control the overall coverage of the device by adjusting the length of the protective mechanism pulled out according to actual needs, so as to meet different ranges of plant protection needs, and the reeling mechanism can be used to directly reel the protective mechanism inside the first frame plate, making the retracting and unfolding operation more convenient and quick.

[0025] 2. The utility model utilizes a zipper to connect the central light-transmitting net and the elastic connecting net at the unfolding opening, so that the central light-transmitting net, the side light-transmitting nets and the elastic connecting net form a whole, and then releases the support for the reeling mechanism by rotating the locking control mechanism, so that the reeling mechanism can be driven by the moving angle adjustment mechanism to adjust the angle between the central light-transmitting net and the two side light-transmitting nets, so as to protect the side of the plant and ensure the protection effect.

[0026] The above summary is for the purpose of description only and is not limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural diagram of the utility model;

[0029] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0030] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of region A;

[0031] Figure 4 It is a cross-sectional structural schematic diagram of the first frame plate of the utility model;

[0032] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure of region B;

[0033] Figure 6 It is an axonometric view of the second splint of the utility model;

[0034] Figure 7 It is an axonometric view of the first frame plate of the utility model;

[0035] Figure 8 It is an axial view of the central winding roller and the side winding rollers of the utility model.

[0036] 1. Bracket assembly; 2. Protection mechanism; 3. Winding mechanism; 4. Angle adjustment mechanism; 5. Locking control mechanism; 101. First frame plate; 102. Second clamping plate; 103. Support frame; 104. Anchor pile; 201. Central light-transmitting net; 202. Side light-transmitting net; 203. Elastic connecting net; 204. Zipper; 301. Central winding roller; 302. Side winding roller; 303. First turntable; 401. Internally threaded knob; 402. Arc slide groove; 403. Threaded column; 404. Support ring; 501. Second turntable; 502. Flexible connecting rod; 503. Rigid supporting rod; 504. Spring; 61. Threaded shaft; 62. Internally threaded sleeve; 63. Guide rod; 64. Handle; 65. Magnetic plate; 66. Magnetic strip. DETAILED DESCRIPTION

[0037] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0038] It should be noted that the terms "first", "second", "symmetrical", "array", etc. are only used to distinguish between description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "symmetrical", etc. can explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three", it should be noted that this feature also explicitly or implicitly includes one or more feature quantities.

[0039] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-8 As shown, the embodiment of the utility model provides an agricultural plant protection device, including a support assembly 1 and a protection mechanism 2, wherein the support assembly 1 includes a first frame plate 101, a second clamping plate 102, two support frames 103 and a plurality of anchor piles 104;

[0041] The second clamping plate 102 is arranged on one side of the first frame plate 101, two support frames 103 are respectively fixedly connected to the bottom of the first frame plate 101 and the second clamping plate 102, a plurality of anchor piles 104 are respectively fixedly connected to the bottom of the two support frames 103, a protection mechanism 2 is arranged between the first frame plate 101 and the second clamping plate 102, a winding mechanism 3 is installed inside the first frame plate 101, an angle adjustment mechanism 4 is arranged between the winding mechanism 3 and the first frame plate 101, and a locking control mechanism 5 is arranged inside the winding mechanism 3;

[0042] The protection mechanism 2 is used to connect the first frame plate 101 and the second clamping plate 102, and to shield and protect the plants; the protection mechanism 2 includes a central light-transmitting net 201, two side light-transmitting nets 202, two elastic connection nets 203 and two zippers 204;

[0043] The two side light-transmitting nets 202 are arranged on both sides of the central light-transmitting net 201, the two elastic connecting nets 203 are respectively fixedly connected to the adjacent sides of the two side light-transmitting nets 202, and the two zippers 204 are connected between the two elastic connecting nets 203 and the central light-transmitting net 201;

[0044] Wherein, the reeling mechanism 3 is used to reel the protection mechanism 2;

[0045] The angle adjustment mechanism 4 is used to cooperate with the reeling mechanism 3 to adjust the overall shape of the protection mechanism 2, so as to protect the plant from the side by changing the shape of the protection mechanism 2;

[0046] Among them, the locking control mechanism 5 is used to support the inside of the winding mechanism 3 by screwing, one end of the central light-transmitting net 201 and the two side light-transmitting nets 202 are fixedly connected with a magnetic suction plate 65, and one side of the inner wall of the second clamping plate 102 is evenly fixedly connected with a magnetic strip 66.

[0047] In one embodiment, the winding mechanism 3 includes a central winding roller 301, two side winding rollers 302 and a first rotating disk 303;

[0048] Among them, the two side winding rollers 302 are hinged at both ends of the central winding roller 301, and the two sides of the outer wall of the central winding roller 301 are rotatably connected to the inner wall of the first frame plate 101 through bearings, one end of the central light-transmitting net 201 is wound around the outer wall of the central winding roller 301, and one end of the two side light-transmitting nets 202 and the elastic connection net 203 are both wound around the outer wall of the side winding roller 302;

[0049] The central light-transmitting net 201 and the side light-transmitting net 202 are pulled out from the first frame plate 101 by moving the magnetic suction plate 65, and then the central light-transmitting net 201 and the side light-transmitting net 202 are used to drive the central winding roller 301 and the side winding roller 302 to rotate respectively, so as to release the central light-transmitting net 201 and the side light-transmitting net 202 wound thereon.

[0050] In one embodiment, the angle adjustment mechanism 4 includes two internal thread knobs 401, two arc-shaped slide grooves 402, two threaded columns 403 and two support rings 404;

[0051] The two support rings 404 are rotatably connected to one side of the outer wall of the two side winding rollers 302 through bearings, one end of the two threaded columns 403 is fixedly connected to the outer wall of the two support rings 404, the two arc-shaped slide grooves 402 are both opened on one side of the first frame plate 101, and the inner side walls of the two internal threaded knobs 401 are respectively threadedly connected to the outer side walls of one end of the two threaded columns 403;

[0052] The internal threaded knob 401 is rotated to separate it from the surface of the first frame plate 101, thereby releasing the lock on the support ring 404 and the threaded column 403, and then the internal threaded knob 401 is moved to drive the side winding roller 302 to move using the threaded column 403 and the support ring 404, and the moving threaded column 403 is guided by the provided arc-shaped slide groove 402.

[0053] In one embodiment, the locking control mechanism 5 includes a second rotating disk 501, three flexible connecting rods 502, two rigid supporting rods 503 and a spring 504;

[0054] The outer wall of the second rotating disk 501 is threadedly connected to the inner wall of a side winding roller 302, two rigid support rods 503 are respectively fixedly connected to one end of the three flexible connecting rods 502 adjacent to each other, the two rigid support rods 503 are respectively located at the connection between the two side winding rollers 302 and the central winding roller 301, one end of a flexible connecting rod 502 is rotatably connected to one end of the second rotating disk 501, one end of a spring 504 is fixedly connected to one end of another flexible connecting rod 502, and the other end of the spring 504 is fixedly connected to the inner wall of another side winding roller 302;

[0055] By rotating the second turntable 501, the flexible connecting rod 502 and the rigid support rod 503 are driven to move by the thread, and the spring 504 is driven to stretch, so that the rigid support rod 503 is moved away from the connection between the central winding roller 301 and the side winding roller 302, so as to unlock the central winding roller 301 and the side winding roller 302.

[0056] In one embodiment, the inner side walls of the two support frames 103 are rotatably connected to two threaded shafts 61, the outer side walls of the two threaded shafts 61 are threadedly connected to two internal threaded sleeves 62, the tops of the two internal threaded sleeves 62 are respectively fixedly connected to the tops of the inner side walls of the first frame plate 101 and the second clamping plate 102, and the upper surfaces of the two support frames 103 are symmetrically fixedly connected to two guide rods 63, and the outer side walls of the guide rods 63 are slidably connected to the inner side walls of the first frame plate 101 and the second clamping plate 102;

[0057] The threaded shaft 61 is rotated to drive the internal threaded sleeve 62 to move by the thread, and the moving internal threaded sleeve 62 drives the first frame plate 101 to move upward as a whole. The guide rod 63 is provided to guide the moving first frame plate 101.

[0058] In one embodiment, a handle 64 is fixedly connected to the top of one side of the first frame plate 101 and the second clamping plate 102;

[0059] The handle 64 is provided so as to move the first frame plate 101 and the second clamping plate 102 as a whole.

[0060] When the utility model is in operation: the first frame plate 101 is moved to drive the support frame 103 and the anchor pile 104 to move to the specified position, and then the anchor pile 104 is inserted into the ground to fix the first frame plate 101 as a whole, and then the threaded shaft 61 is rotated to drive the internal threaded sleeve 62 to move by the thread, and the moving internal threaded sleeve 62 drives the first frame plate 101 to move upward as a whole, so as to adjust the installation height of the central light-transmitting net 201 and the side light-transmitting net 202 according to actual needs, and the guide rod 63 is provided to guide the moving first frame plate 101, and then the second clamping plate 102 is moved to the specified position, and the anchor pile 104 on it is inserted into the ground for fixing.

[0061] The central light-transmitting net 201 and the side light-transmitting net 202 are pulled out from the first frame plate 101 by moving the magnetic suction plate 65, and then the central light-transmitting net 201 and the side light-transmitting net 202 are used to respectively drive the central winding roller 301 and the side winding roller 302 to rotate so as to release the central light-transmitting net 201 and the side light-transmitting net 202 wound thereon, and then the magnetic suction plate 65 is moved to fit with the magnetic strip 66 so as to fix the magnetic suction plate 65 by magnetic attraction, so that the central light-transmitting net 201, the side light-transmitting net 202 and the elastic connecting net 203 are erected above the plants, and then the zipper 204 is moved to connect the elastic connecting net 203 and the central light-transmitting net 201, so that the central light-transmitting net 201, the side light-transmitting net 202 and the elastic connecting net 203 form a whole, thereby improving the protection effect on the plants.

[0062] When the side of the plant needs to be protected, the second turntable 501 is rotated to drive the flexible connecting rod 502 and the rigid support rod 503 to move using the thread, and the spring 504 is driven to stretch, so that the rigid support rod 503 is separated from the connection between the central winding roller 301 and the side winding roller 302, and then the internal thread knob 401 is turned to separate it from the surface of the first frame plate 101, thereby releasing the lock on the support ring 404 and the threaded column 403, and then the internal thread knob 401 is moved to drive the threaded column 403 and the support ring 404 drive the side winding roller 302 to move, and the moving threaded column 403 is guided by the set arc-shaped slide groove 402, so as to adjust the angle between the central light-transmitting net 201 and the side light-transmitting net 202 according to actual needs, and then the internal thread knob 401 is rotated in the reverse direction to use the threaded column 403 to squeeze one side of the first frame plate 101, so as to lock the support ring 404 and the threaded column 403, so that the side of the plant can be protected by the side light-transmitting net 202.

[0063] When the device needs to be recovered as a whole, the internal thread knob 401 is rotated to unlock it, and the internal thread knob 401 is moved to drive the side winding rollers 302 to reset using the threaded column 403 and the support ring 404, so that the two side winding rollers 302 return to the same axis as the central winding roller 301, and then the second turntable 501 is rotated in the opposite direction and the stretched spring 504 is used to reset the flexible connecting rod 502 and the rigid support rod 503, so that the central winding roller 301 can be retracted using the rigid support rod 503. 01 and the side winding roller 302 are supported, and then the zipper 204 is pulled to separate the central light-transmitting net 201 and the elastic connecting net 203, and the magnetic plate 65 is removed from the magnetic strip 66, and then the first turntable 303 is rotated to use the side winding roller 302 to drive the central winding roller 301 to rotate, so that the central light-transmitting net 201 and the side light-transmitting net 202 can be rolled up to the inside of the first frame plate 101 by the rotating central winding roller 301 and the side winding roller 302, thereby completing the overall recycling operation.

[0064] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An agricultural plant protection device, comprising a support assembly (1) and a protection mechanism (2), characterized in that: The support assembly (1) comprises a first frame plate (101), a second clamping plate (102), two support frames (103) and a plurality of anchor piles (104); Wherein, the second clamping plate (102) is arranged on one side of the first frame plate (101), the two support frames (103) are respectively fixedly connected to the bottom of the first frame plate (101) and the second clamping plate (102), a plurality of anchor piles (104) are respectively fixedly connected to the bottom of the two support frames (103), the protection mechanism (2) is arranged between the first frame plate (101) and the second clamping plate (102), a winding mechanism (3) is installed inside the first frame plate (101), an angle adjustment mechanism (4) is arranged between the winding mechanism (3) and the first frame plate (101), and a locking control mechanism (5) is arranged inside the winding mechanism (3); The protective mechanism (2) is used to connect the first frame plate (101) and the second clamping plate (102) and to shield and protect the plants; the protective mechanism (2) comprises a central light-transmitting net (201), two side light-transmitting nets (202), two elastic connection nets (203) and two zippers (204); The two side light-transmitting nets (202) are arranged on both sides of the central light-transmitting net (201), the two elastic connecting nets (203) are respectively fixedly connected to adjacent sides of the two side light-transmitting nets (202), and the two zippers (204) are connected between the two elastic connecting nets (203) and the central light-transmitting net (201); Wherein, the reeling mechanism (3) is used to reel the protection mechanism (2); The angle adjustment mechanism (4) is used to cooperate with the reeling mechanism (3) to adjust the overall shape of the protection mechanism (2), so as to provide side protection for the plant by changing the shape of the protection mechanism (2); The locking control mechanism (5) is used to support the interior of the winding mechanism (3) by means of screwing.

2. The agricultural plant protection device according to claim 1, characterized in that: The winding mechanism (3) comprises a central winding roller (301), two side winding rollers (302) and a first rotating disk (303); The two side winding rollers (302) are hinged at the two ends of the central winding roller (301), the outer side walls of the central winding roller (301) are rotatably connected to the inner side walls of the first frame plate (101) through bearings, one end of the central light-transmitting net (201) is wound around the outer side wall of the central winding roller (301), and one end of the two side light-transmitting nets (202) and the elastic connecting net (203) are both wound around the outer side walls of the side winding roller (302).

3. The agricultural plant protection device according to claim 2, characterized in that: The angle adjustment mechanism (4) comprises two internally threaded knobs (401), two arc-shaped slide grooves (402), two threaded columns (403) and two support rings (404); Among them, the two support rings (404) are rotatably connected to one side of the outer wall of the two side winding rollers (302) through bearings, one end of the two threaded columns (403) are fixedly connected to the outer wall of the two support rings (404), the two arc-shaped slide grooves (402) are both opened on one side of the first frame plate (101), and the inner walls of the two internal threaded knobs (401) are threadedly connected to the outer walls of one end of the two threaded columns (403).

4. The agricultural plant protection device according to claim 2, characterized in that: The locking control mechanism (5) comprises a second rotating disk (501), three flexible connecting rods (502), two rigid supporting rods (503) and a spring (504); The outer wall of the second turntable (501) is threadedly connected to the inner wall of one of the side winding rollers (302); the two rigid support rods (503) are respectively fixedly connected to one end of each of the three flexible connecting rods (502) that are adjacent to each other; the two rigid support rods (503) are respectively located at the connection between the two side winding rollers (302) and the central winding roller (301); one end of one of the flexible connecting rods (502) is rotatably connected to one end of the second turntable (501); one end of the spring (504) is fixedly connected to one end of another of the flexible connecting rods (502); and the other end of the spring (504) is fixedly connected to the inner wall of another of the side winding rollers (302).

5. The agricultural plant protection device according to claim 1, characterized in that: The inner side walls of the two support frames (103) are rotatably connected to two threaded shafts (61), the outer side walls of the two threaded shafts (61) are threadedly connected to two internally threaded sleeves (62), and the tops of the two internally threaded sleeves (62) are respectively fixedly connected to the tops of the inner side walls of the first frame plate (101) and the second clamping plate (102).

6. The agricultural plant protection device according to claim 1, characterized in that: Two guide rods (63) are symmetrically and fixedly connected to the upper surfaces of the two support frames (103), and the outer side walls of the guide rods (63) are slidably connected to the inner side walls of the first frame plate (101) and the second clamping plate (102).

7. The agricultural plant protection device according to claim 1, characterized in that: A handle (64) is fixedly connected to the top of one side of the first frame plate (101) and the second clamping plate (102).

8. The agricultural plant protection device according to claim 1, characterized in that: One end of the central light-transmitting net (201) and the two side light-transmitting nets (202) are fixedly connected to a magnetic attraction plate (65), and one side of the inner side wall of the second clamping plate (102) is evenly fixedly connected to a magnetic strip (66).

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