CN220705586U - Window screening with sand and dust prevention function - Google Patents

Abstract

The utility model relates to the technical field of window screening accessory devices, in particular to a window screening with a sand and dust prevention function, which can clean the window screening without disassembling the window screening and improve the cleaning effect of the window screening, thereby improving the working efficiency and the cleaning effect of the window screening, and further enhancing the practicability of the window screening which is convenient to clean; including window frame main part and window screening main part, window frame main part is provided with the window screening main part, still include the fixed plate, two sets of first sliders, two sets of connecting rods, two sets of first springs, two sets of telescopic links, the brush, the fan, the power, control panel, T pipe, two sets of dust absorption pipes, two sets of hood, two sets of dust collection boxes, two sets of apron, two sets of filter screens, protective structure, limit structure and fixed establishment, window frame main part front end left side and right side are provided with the spout respectively, two sets of first sliders respectively with spout sliding connection, two sets of first slider front end bottoms are provided with the connecting rod respectively.

Description

Window screening with sand and dust prevention function

Technical Field

The utility model relates to the technical field of window screening accessory devices, in particular to a window screening with a sand-dust prevention function.

Background

As is well known, the window screening is made of chemical fiber, namely a very thin cloth, and is generally matched with curtain cloth; another screen stuck on doors and windows becomes a window screen, and the window screen is a net which is widely used on doors and windows and corridors to prevent small insects from disturbing; most are made of nylon, commonly white, green and blue, sometimes referred to as a screen;

the existing window screening has the advantages of preventing external flying insects from entering the house, preventing impurities such as sand and dust from entering the house, and having good sand and dust preventing effect;

however, when the conventional sand-proof window screening is used for a long time, a large amount of impurities such as dust and sand are attached to the window screening net, and the window screening net needs to be cleaned, but the conventional cleaning mode is to clean the window screening through rags, brushes and the like or to detach the window screening net for cleaning, but the conventional cleaning mode is complicated in cleaning work and difficult to clean, so that the working efficiency and the effect of cleaning the window screening are reduced, and the practicality is poor.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the window screen which can be cleaned without disassembling the window screen, and the cleaning effect is improved, so that the working efficiency and the cleaning effect of the window screen are improved, and the practicability of the window screen which is convenient to clean is enhanced.

The utility model relates to a window screen with sand and dust prevention function, which comprises a window frame main body and a window screen main body, wherein the window frame main body is provided with the window screen main body, and further comprises a fixed plate, two groups of first sliding blocks, two groups of connecting rods, two groups of first springs, two groups of telescopic rods, a hairbrush, a fan, a power supply, a control panel, a T-shaped pipe, two groups of dust suction pipes, two groups of air suction caps, two groups of dust collection boxes, two groups of cover plates, two groups of filter screens, a protective structure, a limiting structure and a fixing mechanism, the left side and the right side of the front end of the window frame main body are respectively provided with a sliding groove, the two groups of first sliding blocks are respectively in sliding connection with the sliding grooves, the bottoms of the front ends of the two groups of the first sliding blocks are respectively provided with connecting rods, the front ends of the two groups of the connecting rods are respectively connected with the rear end of the fixed plate, the rear end of the fixed plate is uniformly provided with two groups of telescopic rods, the rear ends of the two groups of telescopic rods are respectively connected with the front ends of the hairbrush, the outer sides of the two groups of telescopic rods are respectively provided with a first spring, the central area of the front end of the fixed plate is provided with a fan, the output end of the top of the fan is connected with the bottom of the T-shaped tube, the front end of the fixed plate is respectively clamped and fixed with the dust collecting box through a fixing mechanism, the two groups of dust collecting boxes are respectively provided with working cavities, the tops of the two groups of dust collecting boxes are respectively provided with working cavities, the left side and the right side of the working cavities of the two groups of dust collecting boxes are respectively provided with reserved holes, the left side and the right side of the T-shaped tube are respectively clamped with one group of reserved holes of the dust collecting boxes, the two groups of dust collecting tubes are respectively clamped with reserved holes of the other end of the dust collecting box, the left side and the right side of the front end of the fixed plate are respectively provided with reserved holes of the fixed plate and the suction cap, the front end of the two groups of the first sliding blocks are respectively clamped with a limiting mechanism, the front end of the fixed plate is provided with a power supply, the front end of the fixed plate is provided with a protection mechanism, and the left side of the protection mechanism is provided with a control panel.

The utility model relates to a window screen with a sand and dust prevention function, which comprises two groups of bidirectional screws, four groups of second sliding blocks, four groups of clamping plates, mounting seats, rotating rods, driving gears and two groups of driven gears, wherein the front end of a fixing plate is uniformly provided with two groups of sliding grooves, the two groups of bidirectional screws are respectively in rotary connection with the sliding grooves, the four groups of second sliding blocks are respectively in threaded connection with the bidirectional screws, the four groups of second sliding blocks are respectively in sliding connection with the sliding grooves, the front ends of the four groups of second sliding blocks are respectively provided with the clamping plates, one ends of the four groups of clamping plates are respectively clung to one end of a dust collecting box, the left side and the right side of the front end of the fixing plate are respectively provided with the mounting seats, the two groups of rotating rods are respectively in threaded connection with the mounting seats, the rear ends of the two groups of rotating rods are respectively provided with the driving gears, the two groups of driving gears and the driven gears are meshed, and the inner sides of the two groups of driven gears are respectively connected with the outer sides of one end of the bidirectional screws.

The utility model relates to a window screen with a sand and dust prevention function, which comprises two groups of sliding rods, two groups of second springs, two groups of third sliding blocks, two groups of handles, two groups of clamping rods and two groups of clamping rings, wherein the tops of the front ends of the two groups of first sliding blocks are respectively provided with the clamping rings, two groups of reserved grooves are respectively arranged at the tops of the front ends of a window frame main body, the two groups of third sliding blocks are respectively connected with the sliding rods in a sliding manner, the two groups of third sliding blocks are respectively connected with the reserved grooves in a sliding manner, the outer sides of the two groups of sliding rods are respectively provided with the second springs, the rear ends of the two groups of clamping rods are respectively connected with the front ends of the third sliding blocks, one ends of the two groups of clamping rings are respectively clamped with the clamping rings, and the tops of the two groups of clamping rods are respectively provided with the handles.

The utility model relates to a window screen with a sand and dust prevention function, which comprises four groups of connecting blocks, a protective shell, two groups of fastening screws and two groups of thread seats, wherein the protective shell is provided with a working cavity, two groups of clamping grooves are respectively arranged at the top and the bottom of a fixed plate, the four groups of connecting blocks are respectively clamped with the clamping grooves in a sliding manner, then the tops of the two groups of connecting blocks are respectively connected with the top of the working cavity of the protective shell, the bottoms of the other two groups of connecting blocks are respectively connected with the bottom of the working cavity of the protective shell, the top of the protective shell is provided with the two groups of thread seats, the two groups of fastening screws respectively penetrate through the thread seats and the top of the protective shell, and the bottoms of the two groups of fastening screws respectively cling to the top of the fixed plate.

The window screen with the sand and dust prevention function further comprises four groups of clamping blocks and two groups of limiting rings, wherein a plurality of clamping blocks are respectively arranged at the top of one end of each of the two groups of dust collecting boxes, the clamping blocks at the other end of each of the two groups of cover plates are respectively arranged at one end of each of the two groups of cover plates, the bottoms of one ends of the two groups of limiting rings are respectively connected with the clamping blocks at the top of one end of each of the dust collecting boxes in a rotating manner, and the tops of one ends of the two groups of limiting rings are respectively clamped with the clamping blocks at one end of each of the cover plates.

The window screen with the sand and dust prevention function also comprises four groups of rubber pads, one ends of the four groups of clamping plates are respectively provided with the rubber pads, and the other ends of the four groups of rubber pads are respectively clung to one end of the dust collecting box.

The utility model relates to a window screen with a sand and dust prevention function, which also comprises four groups of rubber rings, wherein one ends of two groups of air suction pipes are respectively provided with the rubber rings, the other ends of the two groups of rubber rings are respectively clung to one end of a dust collecting box, the left side and the right side of a T-shaped pipe are respectively provided with the rubber rings, and the other ends of the two groups of rubber rings are respectively clung to one end of the dust collecting box.

The utility model relates to a window screen with a sand and dust prevention function, which also comprises four groups of handles, wherein two groups of handles are arranged at the front end of a protective shell, and handles are also respectively arranged at the front ends of two groups of dust collecting boxes.

Compared with the prior art, the window screening with the sand and dust prevention function has the beneficial effects that: firstly, the limiting mechanism is pulled to separate the two groups of first sliding blocks and the limiting mechanism from clamping, then the power supply is started through the control panel to enable the fan to start working, the T-shaped tube starts to suck air, the staff controls the fixing plate to vertically reciprocate through the two groups of first sliding blocks to enable the hairbrush to clean dust on the window screen main body, then the motor is used for sucking air, the dust that makes the clearance get off gets into the dust collection box through hood and dust absorption pipe, after the cleanness finishes, stop the fan work can, then rotate fixed establishment for two sets of dust collection boxes break away from the clamping respectively and fix, the staff takes out, pour into the dust in two sets of dust collection box working chambers appointed position can, thereby improved clear work efficiency and the effect of going on the window screening, consequently strengthened the practicality.

Drawings

FIG. 1 is a schematic elevational cross-sectional view of the present utility model;

FIG. 2 is a schematic cross-sectional view of a top-down structure of the present utility model;

FIG. 3 is an enlarged schematic view of the front view of the A structure of the present utility model;

FIG. 4 is an enlarged schematic top view of the A structure of the present utility model;

the reference numerals in the drawings: 1. a window frame body; 2. a window screening body; 3. a fixing plate; 4. a first slider; 5. a connecting rod; 6. a first spring; 7. a telescopic rod; 8. a brush; 9. a blower; 10. a power supply; 11. a control panel; 12. a T-shaped tube; 13. a dust collection pipe; 14. a hood; 15. a dust collection box; 16. a cover plate; 17. a filter screen; 18. a bidirectional screw; 19. a second slider; 20. a clamping plate; 21. a mounting base; 22. a rotating lever; 23. a drive gear; 24. a driven gear; 25. a slide bar; 26. a second spring; 27. a third slider; 28. a handle; 29. a clamping rod; 30. a clasp; 31. a connecting block; 32. a protective shell; 33. fastening a screw; 34. a screw seat; 35. a clamping block; 36. a limiting ring; 37. a rubber pad; 38. a rubber ring; 39. a handle.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 4, the window screen with sand and dust prevention function of the present utility model comprises a window screen main body 1 and a window screen main body 2, wherein the window screen main body 1 is provided with the window screen main body 2, and further comprises a fixing plate 3, two groups of first sliding blocks 4, two groups of connecting rods 5, two groups of first springs 6, two groups of telescopic rods 7, a brush 8, a fan 9, a power supply 10, a control panel 11, a T-shaped tube 12, two groups of dust collecting tubes 13, two groups of air suction caps 14, two groups of dust collecting boxes 15, two groups of cover plates 16, four groups of filter screens 17, a protection structure, a limiting structure and a fixing mechanism, sliding grooves are respectively arranged on the left side and the right side of the front end of the window screen main body 1, the two groups of first sliding blocks 4 are respectively connected with the sliding grooves in a sliding manner, connecting rods 5 are respectively arranged at the bottom of the front end of the two groups of the first sliding blocks 4, the front ends of the two groups of connecting rods 5 are respectively connected with the rear end of the fixing plate 3, two groups of telescopic rods 7 are uniformly arranged at the rear end of the fixing plate 3, the rear ends of the two groups of telescopic rods 7 are respectively connected with the front ends of the hairbrushes 8, the rear ends of the hairbrushes 8 are clung to the front end of the window frame main body 1, the outer sides of the two groups of telescopic rods 7 are respectively provided with a first spring 6, the central area of the front end of the fixed plate 3 is provided with a fan 9, the top output end of the fan 9 is connected with the bottom of a T-shaped tube 12, the front end of the fixed plate 3 is respectively clamped and fixed with a dust collection box 15 through a fixing mechanism, the two groups of dust collection boxes 15 are respectively provided with working cavities, the tops of the two groups of dust collection boxes 15 are respectively provided with working cavities, the left side and the right side of the working cavities of the two groups of dust collection boxes 15 are respectively provided with reserved holes, the left side and the right side of the T-shaped tube 12 are respectively clamped with one group of reserved holes of the dust collection boxes 15, and one end of the two groups of dust collection tubes 13 are respectively clamped with the reserved holes at the other end of the dust collection boxes 15, the left side and the right side of the front end of the fixed plate 3 are respectively provided with reserved holes, the other ends of the two groups of dust collection pipes 13 respectively penetrate through preformed holes of the fixed plate 3 and are connected with the air suction cap 14, the tops of the front ends of the two groups of first sliding blocks 4 are respectively clamped with the limiting mechanism, a power supply 10 is arranged on the left side of the front end of the fixed plate 3, a protection mechanism is arranged on the front end of the fixed plate 3, and a control panel 11 is arranged on the left side of the protection mechanism; firstly, the limiting mechanism is pulled to separate the two groups of first sliding blocks and the limiting mechanism from clamping, then the power supply is started through the control panel to enable the fan to start working, the T-shaped tube starts to suck air, the staff controls the fixing plate to vertically reciprocate through the two groups of first sliding blocks to enable the hairbrush to clean dust on the window screen main body, then the motor is used for sucking air, the dust that makes the clearance get off gets into the dust collection box through hood and dust absorption pipe, after the cleanness finishes, stop the fan work can, then rotate fixed establishment for two sets of dust collection boxes break away from the clamping respectively and fix, the staff takes out, pour into the dust in two sets of dust collection box working chambers appointed position can, thereby improved clear work efficiency and the effect of going on the window screening, consequently strengthened the practicality.

The utility model relates to a window screen with a sand and dust prevention function, which comprises two groups of bidirectional screw rods 18, four groups of second slide blocks 19, four groups of clamping plates 20, two groups of installation seats 21, two groups of rotating rods 22, two groups of driving gears 23 and two groups of driven gears 24, wherein the front end of a fixed plate 3 is uniformly provided with two groups of sliding grooves, the two groups of bidirectional screw rods 18 are respectively and rotatably connected with the sliding grooves, the four groups of second slide blocks 19 are respectively and rotatably connected with the bidirectional screw rods 18, the four groups of second slide blocks 19 are respectively and slidably connected with the sliding grooves, the front ends of the four groups of second slide blocks 19 are respectively provided with clamping plates 20, one ends of the four groups of clamping plates 20 are respectively and tightly attached to one end of a dust collecting box 15, the left side and the right side of the front end of the fixed plate 3 are respectively provided with installation seats 21, the two groups of rotating rods 22 are respectively and rotatably connected with the installation seats 21, the rear end of the two groups of rotating rods 22 are respectively provided with driving gears 23, the two groups of driving gears 23 and the driven gears 24 are meshed, and the inner sides of the two groups of driven gears 24 are respectively and connected with the outer sides of one end of the bidirectional screw rods 18; the rotating rod is rotated, so that the driving gear and the driven gear rotate, the two groups of bidirectional screws rotate, and the four groups of second sliding blocks respectively drive the clamping plates to move until the clamping plates are tightly attached to one end of the dust collecting box, so that the dust collecting box can be quickly assembled and disassembled, the working efficiency and the effect of cleaning window yarns are improved, and the practicability is enhanced.

The utility model relates to a window screen with a sand dust prevention function, which comprises two groups of slide bars 25, two groups of second springs 26, two groups of third slide blocks 27, two groups of handles 28, two groups of clamping rods 29 and two groups of clamping rings 30, wherein the top of the front end of each of the two groups of first slide blocks 4 is respectively provided with the clamping ring 30, the top of the front end of a window frame main body 1 is provided with two groups of reserved grooves, the two groups of reserved grooves are respectively provided with the slide bars 25, the two groups of third slide blocks 27 are respectively in sliding connection with the reserved grooves, the outer sides of the two groups of slide bars 25 are respectively provided with the second springs 26, the rear ends of the two groups of clamping rods 29 are respectively connected with the front ends of the third slide blocks 27, one ends of the two groups of the clamping rings 30 are respectively clamped with the clamping rings 30, and the tops of the two groups of the clamping rods 29 are respectively provided with the handles 28; through two sets of clamping bars of handle pulling, two sets of third sliders begin to slide, compress two sets of second springs, and two sets of clamping bars and snap ring break away from the clamping, can carry out spacingly to first slider, prevent to take place to slide when idle, have consequently strengthened the practicality.

The utility model relates to a window screen with a sand dust prevention function, which comprises four groups of connecting blocks 31, a protective shell 32, two groups of fastening screws 33 and two groups of thread seats 34, wherein the protective shell 32 is provided with a working cavity, the top and the bottom of a fixed plate 3 are respectively provided with two groups of clamping grooves, the four groups of connecting blocks 31 are respectively clamped with the clamping grooves in a sliding manner, then the top of the two groups of connecting blocks 31 are respectively connected with the top of the working cavity of the protective shell 32, the bottom of the other two groups of connecting blocks 31 are respectively connected with the bottom of the working cavity of the protective shell 32, the top of the protective shell 32 is provided with two groups of thread seats 34, the two groups of fastening screws 33 respectively penetrate through the thread seats 34 and the top of the protective shell 32 in a threaded connection manner, and the bottom of the two groups of fastening screws 33 respectively cling to the top of the fixed plate 3; can improve the protective capability, prevent to take place to collide with other unexpected factors such as to the destruction that the internals caused to play spacing effect to the protecting crust through fastening screw, prevent that the protecting crust from taking place to break away from, consequently strengthened the practicality.

The utility model relates to a window screen with a sand and dust prevention function, which also comprises four groups of clamping blocks 35 and two groups of limiting rings 36, wherein the top of one end of each of two groups of dust collecting boxes 15 is respectively provided with a plurality of clamping blocks 35, one end of each of two groups of cover plates 16 is respectively provided with the other end of each of clamping blocks 35, the bottom of one end of each of the two groups of limiting rings 36 is respectively and rotatably connected with the top clamping block 35 of one end of each of the dust collecting boxes 15, and the top of one end of each of the two groups of limiting rings 36 is respectively clamped with the clamping block 35 of one end of each of the cover plates 16; can prevent when carrying out the cleanness that the apron is opened because of the accident, lead to unable cleaning work to window screening carries out spacing effect to it to improved the stability of device, consequently strengthened the practicality.

The window screen with the sand and dust prevention function also comprises four groups of rubber pads 37, one ends of the four groups of clamping plates 20 are respectively provided with the rubber pads 37, and the other ends of the four groups of rubber pads 37 are respectively clung to one end of the dust collecting box 15; the damage to the connecting rod caused by friction extrusion can be reduced, so that the practicability is enhanced.

The utility model relates to a window screen with a sand and dust prevention function, which also comprises four groups of rubber rings 38, wherein one end of each of two groups of air suction pipes is respectively provided with the rubber rings 38, the other ends of the two groups of rubber rings 38 are respectively clung to one end of a dust collection box 15, the left and right ends of a T-shaped pipe 12 are respectively provided with the rubber rings 38, and the other ends of the two groups of rubber rings 38 are respectively clung to one end of the dust collection box 15; improve the gas tightness, improve work efficiency and effect that absorbs dust impurity, consequently strengthened the practicality.

The utility model relates to a window screen with a sand and dust prevention function, which also comprises four groups of handles 39, wherein the front end of a protective shell 32 is provided with two groups of handles 39, and the front ends of two groups of dust collecting boxes 15 are also respectively provided with handles 39; the window screen cleaning device has the advantages that a worker can clean the window screen more quickly, so that the working efficiency and the effect of cleaning the window screen are improved, and the practicability is improved.

When the window screen with the sand dust prevention function works, two groups of clamping rods are pulled by the handle, two groups of third sliding blocks start to slide, two groups of second springs are compressed, the two groups of clamping rods and the clamping rings are separated from clamping, then a power supply is started through the control panel, the fan starts to work, suction air is started through the T-shaped pipe, a worker controls the fixing plate to vertically reciprocate through the two groups of handles, the hairbrush cleans dust on the window screen main body, then the cleaned dust enters the dust collecting box through the air suction cap and the dust suction pipe due to the suction effect of the motor, after the cleaning is finished, the fan is stopped, the rotating rod is rotated, the driving gear and the driven gear are rotated, the two groups of bidirectional screws are rotated, the four groups of second sliding blocks are respectively driven to move the clamping plates until the two groups of dust collecting boxes are respectively separated from clamping and fixed, the worker takes out the dust in the working cavity of the two groups of dust collecting boxes through the handles, and the dust collecting boxes are poured into the designated positions, and the dust collecting boxes are firstly moved to the positions required by the user before the dust collecting boxes are finished.

The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

The terms "first," "second," and "third" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (8)

1. The window screening with the sand and dust prevention function comprises a window screening main body (1) and a window screening main body (2), wherein the window screening main body (2) is arranged on the window screening main body (1), and is characterized by further comprising a fixing plate (3), two groups of first sliding blocks (4), two groups of connecting rods (5), two groups of first springs (6), two groups of telescopic rods (7), a hairbrush (8), a fan (9), a power supply (10), a control panel (11), a T-shaped pipe (12), two groups of dust collection pipes (13), two groups of air suction caps (14), two groups of dust collection boxes (15), two groups of cover plates (16), two groups of filter screens (17), a protection structure, a limiting structure and a fixing mechanism, the left side and the right side of the front end of the window frame main body (1) are respectively provided with a sliding groove, two groups of first sliding blocks (4) are respectively connected with the sliding groove in a sliding way, the bottoms of the front ends of the two groups of first sliding blocks (4) are respectively provided with a connecting rod (5), the front ends of the two groups of connecting rods (5) are respectively connected with the rear end of the fixed plate (3), the rear end of the fixed plate (3) is uniformly provided with two groups of telescopic rods (7), the rear ends of the two groups of telescopic rods (7) are respectively connected with the front end of the hairbrush (8), the rear end of the hairbrush (8) is clung to the front end of the window frame main body (1), the outer sides of the two groups of telescopic rods (7) are respectively provided with a first spring (6), the central region of fixed plate (3) front end is provided with fan (9), fan (9) top output and T type pipe (12) bottom are connected, fixed plate (3) front end is fixed with dust collection box (15) clamps respectively through fixed establishment, two sets of dust collection boxes (15) are provided with the working chamber respectively, two sets of dust collection box (15) tops are provided with the working chamber respectively, two sets of dust collection box (15) working chamber left side and right side are provided with the preformed hole respectively, T type pipe (12) left side and right side respectively with dust collection box (15) a set of preformed hole clamps, and this two sets of preformed hole are provided with filter screen (17), two sets of dust absorption pipe (13) one end respectively with dust collection box (15) other end preformed hole clamps, fixed plate (3) front end left side and right side are provided with the preformed hole respectively, two sets of dust absorption pipe (13) other ends pass fixed plate (3) preformed hole and induced draft cap (14) respectively and are connected, two sets of first slider (4) front end tops are respectively with stop gear clamps, fixed plate (3) front end is provided with power supply mechanism (10), and protection mechanism (11) are provided with on the left side, protection device is provided with protection mechanism (11).

2. A window screening with sand-dust prevention function as claimed in claim 1, characterized in that the fixing mechanism comprises two groups of bidirectional screws (18), four groups of second sliding blocks (19), four groups of clamping plates (20), a mounting seat (21), a rotating rod (22), a driving gear (23) and two groups of driven gears (24), two groups of sliding grooves are uniformly formed in the front end of the fixing plate (3), the two groups of bidirectional screws (18) are respectively connected with the sliding grooves in a rotating mode, the four groups of second sliding blocks (19) are respectively connected with the bidirectional screws (18) in a threaded mode, the four groups of second sliding blocks (19) are respectively connected with the sliding grooves in a sliding mode, clamping plates (20) are respectively arranged at the front ends of the four groups of second sliding blocks (19), one ends of the four groups of clamping plates (20) are respectively clung to one end of the dust collecting box (15), the left side and the right side of the front end of the fixing plate (3) are respectively provided with the mounting seat (21), the two groups of rotating rods (22) are respectively connected with the mounting seat (21) in a threaded mode, the rear ends of the two groups of rotating rods (22) are respectively provided with the driving gear (23), the two groups of driving gears (23) are respectively meshed with the driven gears (24), and the two groups of driven gears (24) are respectively meshed with the two outer sides of the two groups of driven gears (18).

3. A window screening with sand and dust prevention function according to claim 2, characterized in that the limiting mechanism comprises two groups of sliding rods (25), two groups of second springs (26), two groups of third sliding blocks (27), two groups of handles (28), two groups of clamping rods (29) and two groups of clamping rings (30), wherein the top of the front end of the two groups of first sliding blocks (4) is respectively provided with two groups of reserved grooves, the top of the front end of the window frame main body (1) is respectively provided with the sliding rods (25), the two groups of third sliding blocks (27) are respectively in sliding connection with the reserved grooves, the outer sides of the two groups of sliding rods (25) are respectively provided with the second springs (26), the rear ends of the two groups of clamping rods (29) are respectively connected with the front ends of the third sliding blocks (27), one ends of the two groups of the clamping rings (30) are respectively clamped with the clamping rings (30), and the tops of the two groups of the clamping rods (29) are respectively provided with the handles (28).

4. A window screening with sand and dust prevention function according to claim 3, characterized in that the protection mechanism comprises four groups of connecting blocks (31), a protection shell (32), two groups of fastening screws (33) and two groups of thread seats (34), the protection shell (32) is provided with a working cavity, two groups of clamping grooves are respectively arranged at the top and the bottom of the fixing plate (3), the four groups of connecting blocks (31) are respectively clamped with the clamping grooves in a sliding manner, then the tops of the two groups of connecting blocks (31) are respectively connected with the top of the working cavity of the protection shell (32), the bottoms of the other two groups of connecting blocks (31) are respectively connected with the bottom of the working cavity of the protection shell (32), the top of the protection shell (32) is provided with two groups of thread seats (34), the two groups of fastening screws (33) respectively penetrate through the thread seats (34) and the top of the protection shell (32), and the bottoms of the two groups of fastening screws (33) are respectively clung to the top of the fixing plate (3).

5. A window screening with sand and dust prevention function as claimed in claim 4, further comprising four groups of clamping blocks (35) and two groups of limiting rings (36), wherein a plurality of clamping blocks (35) are respectively arranged at the top of one end of each of the two groups of dust collecting boxes (15), the other end of each of the two groups of cover plates (16) is respectively provided with the other end of each of the clamping blocks (35), one end bottoms of the two groups of limiting rings (36) are respectively connected with one end top clamping blocks (35) of each of the dust collecting boxes (15) in a rotating manner, and one end tops of the two groups of limiting rings (36) are respectively clamped with one end clamping block (35) of each of the cover plates (16).

6. A window screening with sand and dust preventing function as claimed in claim 5, further comprising four groups of rubber pads (37), wherein one ends of the four groups of clamping plates (20) are respectively provided with the rubber pads (37), and the other ends of the four groups of rubber pads (37) are respectively clung to one end of the dust collecting box (15).

7. A window screening with sand and dust preventing function as set forth in claim 6, further comprising four sets of rubber rings (38), wherein one ends of the two sets of air suction pipes are respectively provided with the rubber rings (38), the other ends of the two sets of rubber rings (38) are respectively clung to one end of the dust collecting box (15), the left and right ends of the T-shaped pipe (12) are respectively provided with the rubber rings (38), and the other ends of the two sets of rubber rings (38) are respectively clung to one end of the dust collecting box (15).

8. A window screening with a sand and dust protection function according to claim 7, characterized in that it further comprises four sets of handles (39), two sets of handles (39) are provided at the front end of the protective housing (32), and handles (39) are provided at the front ends of the two sets of dust boxes (15), respectively.