Novel ventilation door structure

Abstract

The utility model discloses a novel ventilation door structure which comprises an inner frame assembly, the inner frame assembly is connected with an inner frame doorsill assembly, the inner frame assembly is connected with an outer frame assembly, the inner frame assembly is connected with a fixed doorsill assembly in a matched mode through the inner frame doorsill assembly, and the inner frame assembly is connected with a window frame assembly and a screen window assembly. The window frame assembly is connected with a multi-layer glass assembly. The sealing performance of the ventilation door is guaranteed through the fixed doorsill assembly and the inner frame doorsill assembly, the height of the fixed doorsill assembly and the inner frame doorsill assembly is lower than that of the outer frame assembly, the passing ability is guaranteed, the attractiveness in the opening state is not affected, and the impact of the inner frame assembly on the fixed doorsill assembly when the door is closed is reduced through the first buffering pressing strip and the second buffering pressing strip; damage to the fixed doorsill assembly is reduced, the maintenance cost is reduced, the screen window assembly is flush with the outer surface of the inner frame assembly through the screen window fixing frame, and opening and closing of the screen window assembly are guaranteed through the screen window rotating frame.

Description

Technical Field

[0001] The utility model relates to the field of aluminum alloy doors and windows, in particular to a novel ventilation door structure. Background Art

[0002] Aluminum alloy doors and windows refer to doors and windows made of aluminum alloy extruded profiles as frames, stiles, and fan materials. Casement windows have the advantages of large opening area, good ventilation, good sealing, excellent sound insulation, heat preservation, and anti-seepage properties. The inward-opening type is easy to clean the windows, and the outward-opening type does not take up space when opened.

[0003] Existing doors and windows often adopt an integrated outer frame structure, that is, the door and window frames are fixed first, and then the doors and windows are installed. However, the ventilation door structure using an integrated outer frame structure does not have a threshold, which causes the traditional outer frame structure to be too high, affecting the appearance while reducing the passability. If the threshold is not used, it will cause water leakage and air leakage, affecting the sealing of the ventilation door. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the above-mentioned traditional technology and provide a casement ventilation door and ventilation door threshold node structure which ensure aesthetics and sealing while ensuring a certain degree of passability.

[0005] The purpose of this utility model is achieved through the following technical measures:

[0006] A novel ventilation door structure, characterized in that: it includes an inner frame assembly, the inner frame assembly is connected to an inner frame threshold assembly, the inner frame assembly is connected to an outer frame assembly, the inner frame assembly is connected to a fixed threshold assembly through the inner frame threshold assembly, the inner frame assembly includes a first inner frame body and a second inner frame body, an inner frame extension frame is fixedly connected to the side surface of the first inner frame body, an inner frame pressure strip is inserted into the inner frame extension frame, an inner frame mounting groove is opened on the side surface of the second inner frame body, an inner frame sealing strip is inserted into the inner frame mounting groove, an inner frame connecting frame and an inner frame sealing pressing frame are fixedly connected between the first inner frame body and the second inner frame, an inner frame sealing strip is clamped on the side surface of the inner frame connecting frame, and the inner frame threshold assembly includes an inner frame buffer extension frame The inner frame buffer extension frame is fixedly connected to the first inner frame body, the inner frame buffer extension frame is plugged with a first buffer strip, the second inner frame body is provided with an inner frame buffer installation groove, the second buffer strip is plugged in the inner frame buffer installation groove, a threshold sealing strip is fixedly connected between the inner frame buffer extension frame and the inner frame sealing pressure frame, the fixed threshold assembly includes a first threshold frame body and a second threshold frame, the first threshold frame and the second threshold frame are fixedly connected to a threshold connecting frame, a threshold sealing strip is fixedly connected to the upper surface of the threshold connecting frame, the threshold sealing strip and the threshold sealing strip are tightly arranged, the inner frame assembly is connected to a window frame assembly and a screen window assembly, and the window frame assembly is connected to a multi-layer glass assembly.

[0007] As an improvement: the outer frame assembly includes a first outer frame body and a second outer frame body, two outer frame connecting frames are fixedly connected between the first outer frame body and the second outer frame body, an outer frame sealing strip is inserted into the outer side of one of the outer frame connecting frames, the first outer frame body is provided with an outer frame mounting groove, an outer frame sealing strip is inserted into the outer frame mounting groove, the outer frame sealing strip is tightly fitted with the first inner frame body, and the inner frame sealing strip is tightly fitted with the second outer frame body.

[0008] As an improvement: the window frame assembly includes a first window frame body and a second window frame body, a window frame connecting frame and a window frame sealing pressure frame are fixedly connected between the first window frame body and the second window frame body, a window frame extension frame is fixedly connected to the side of the first window frame body, a window frame installation groove is opened on the side of the first window frame body, a window frame sealing strip is inserted in the window frame installation groove, and a window frame extension frame is fixedly connected to the side of the second window frame body.

[0009] As an improvement: the multi-layer glass assembly includes multiple single-layer glass plates, and interlayer partition frames are fixedly connected between the multiple single-layer glass plates, and glass insulation frames are fixedly connected to the outer sides of the multiple single-layer glass plates. Interlayer sealant is filled between the glass insulation frame and the interlayer partition frame, and one of the single-layer glass plates close to the outdoors is connected to a first glass sealing strip, and the first glass sealing strip is cooperatively connected to the window frame extension frame, and one of the single-layer glass plates close to the indoors is connected to a second glass sealing strip, and the second glass sealing strip is cooperatively connected to the window frame extension frame.

[0010] As an improvement: a fixed window assembly is connected between the inner frame assembly and the multi-layer glass assembly, and the fixed window assembly includes a fixed mounting frame and a window sash pressing frame, the fixed mounting frame is fixedly connected to the second inner frame, a matching strip is fixedly connected to the fixed mounting frame, a matching slot is provided on the window sash pressing frame, the fixed mounting frame and the window sash pressing frame are plug-in-fittedly connected by matching strips and matching slots, the fixed mounting frame is provided with a window sash mounting groove, the first glass sealing strip is matchingly connected to the window sash mounting groove, and the second glass sealing strip is matchingly connected to the inner frame extension frame.

[0011] As an improvement: the screen window assembly includes a screen window installation frame, a buffer rubber strip is inserted into the side of the screen window installation frame, a screen window fixing strip is inserted into the screen window installation frame, the screen window installation frame is fixedly connected to a screen window cloth via the screen window fixing strip, the inner frame extension frame is fixedly connected to two groups of screen window fixing frames, one group of the screen window fixing frames is rotatably connected to a screen window rotating frame, the screen window rotating frame is fixedly connected to the screen window installation frame, a locking switch is fixedly connected to the side of the screen window installation frame, and the other group of the screen window fixing frames is cooperatively connected to the locking switch.

[0012] Due to the adoption of the above technical solution, compared with the prior art, the utility model has the following advantages:

[0013] A threshold is formed by the fixed threshold assembly and the inner frame threshold assembly to ensure the sealing of the ventilation door, and the heights of the fixed threshold assembly and the inner frame threshold assembly are lower than those of the outer frame assembly, thereby ensuring a certain degree of passability without affecting the aesthetics in the open state; the first buffer strip and the second buffer strip can reduce the impact of the inner frame assembly on the fixed threshold assembly when closing the door, reduce damage to the fixed threshold assembly, and reduce repair and maintenance costs; the screen window fixing frame can make the screen window assembly flush with the outer surface of the inner frame assembly; the screen window rotating frame can ensure the normal opening and closing of the screen window assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0016] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of BB.

[0017] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of CC.

[0018] Figure 5 yes Figure 2 Schematic diagram of the split structure of the outer frame component and the inner frame component.

[0019] Figure 6 yes Figure 2 Schematic diagram of the connection structure of the middle window frame assembly.

[0020] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure of a multi-layer glass component.

[0021] Figure 8 yes Figure 6 Schematic diagram of the split structure of the middle screen window assembly.

[0022] Fig. 9 yes Figure 3 Schematic diagram of the split structure of the fixed window assembly and the multi-layer glass assembly.

[0023] Fig.10 yes Figure 4 Schematic diagram of the split structure of the middle inner frame door sill assembly and the fixed door sill assembly.

[0024] Fig.11It is a schematic diagram of the overall structure of the utility model in an outwardly opened state.

[0025] Fig.12 yes Fig.11 Schematic diagram of the cross-sectional structure of DD.

[0026] Fig.13 yes Fig.11 Schematic diagram of the cross-sectional structure of EE.

[0027] In the figure: 1. outer frame assembly; 11. first outer frame; 12. second outer frame; 13. outer frame connecting frame; 14. outer frame sealing strip; 15. outer frame mounting groove; 16. outer frame sealing strip; 2. inner frame assembly; 21. first inner frame; 22. second inner frame; 23. inner frame connecting frame; 24. inner frame sealing pressing frame; 25. inner frame sealing strip; 26. inner frame extension frame; 27. inner frame pressure strip; 28. inner frame mounting groove; 29. ​​inner frame sealing strip; 3. inner frame threshold assembly; 31. inner frame buffer extension frame; 32. inner frame buffer mounting groove; 33. threshold sealing strip; 34. first buffer pressure strip; 35. second buffer pressure strip; 4. fixed threshold assembly; 41. first threshold frame; 42. second threshold frame; 43. threshold connecting frame; 44. threshold sealing strip; 5. Window frame assembly; 51, first window frame; 52, second window frame; 53, window frame connecting frame; 54, window frame sealing pressing frame; 55, window frame extension frame; 56, window frame mounting groove; 57, window frame body sealing strip; 58, window frame extension frame; 6, multi-layer glass assembly; 61, single-layer glass plate; 62, first glass sealing strip; 63, second glass sealing strip; 64, interlayer partition frame; 65, interlayer sealant; 66, glass insulation frame; 7, screen assembly; 71, screen installation frame; 72, screen fixing strip; 73, screen fixing frame; 74, screen rotating frame; 75, locking switch; 76, buffer rubber strip; 77, screen cloth; 8, fixed window assembly; 81, fixed installation frame; 82, window sash pressing frame; 83, window sash mounting groove; 84, matching slot; 85, matching strip. DETAILED DESCRIPTION

[0028] Example: Figure 1 , 4As shown in 10, a novel ventilation door structure is characterized in that: it includes an inner frame component 2, the inner frame component 2 is connected to an inner frame threshold component 3, the inner frame component 2 is connected to an outer frame component 1, the inner frame component 2 is connected to a fixed threshold component 4 through the inner frame threshold component 3, the inner frame component 2 includes a first inner frame body 21 and a second inner frame body 22, the first inner frame body 21 is fixedly connected to an inner frame extension frame 26 on the side, the inner frame extension frame 26 is plugged with an inner frame pressure strip 27, the second inner frame body 22 is provided with an inner frame mounting groove 28 on the side, an inner frame body sealing strip 29 is plugged into the inner frame mounting groove 28, an inner frame connecting frame 23 and an inner frame sealing pressing frame 24 are fixedly connected between the first inner frame body 21 and the second inner frame 22, the inner frame connecting frame 23 is clamped with an inner frame sealing strip 25 on the side, and the inner frame threshold component 3 includes an inner frame buffer extension frame 31, the inner frame buffer extension frame 31 is fixedly connected to the first inner frame body 21, the inner frame buffer extension frame 31 is plugged with a first buffer strip 34, the second inner frame body 22 is provided with an inner frame buffer installation groove 32, the inner frame buffer installation groove 32 is plugged with a second buffer strip 35, a threshold sealing strip 33 is fixedly connected between the inner frame buffer extension frame 31 and the inner frame sealing pressing frame 24, the fixed threshold assembly 4 includes a first threshold frame body 41 and a second threshold frame body 42, the first threshold frame body 41 and the second threshold frame body 42 are fixedly connected to a threshold connecting frame 43, a threshold sealing strip 44 is fixedly connected to the upper surface of the threshold connecting frame 43, the threshold sealing strip 44 is tightly arranged with the threshold sealing strip 33, the inner frame assembly 2 is connected with a window frame assembly 5 and a screen window assembly 7, and the window frame assembly 5 is connected with a multi-layer glass assembly 6.

[0029] like Figure 1 , 4 As shown in Figure 10, the threshold connecting frame 43 can be used to fix the first threshold frame 41 and the second threshold frame 42, so as to ensure the stability of the first threshold frame 41 and the second threshold frame 42. The threshold sealing strip 44 and the threshold sealing strip 33 can ensure a certain sealing between the fixed threshold assembly 4 and the inner frame threshold assembly 3, so as to ensure the windproof and waterproof effect of the ventilation door. The first buffer strip 34 and the second buffer strip 35 can play a certain buffering role when opening and closing the door, so as to prevent the fixed threshold assembly 4 and the inner frame threshold assembly 3 from colliding and causing damage to the fixed threshold assembly 4 and the inner frame threshold assembly 3.

[0030] like Figure 1 , 2As shown in Figures 5 and 6, the outer frame assembly 1 includes a first outer frame body 11 and a second outer frame body 12, two outer frame connection frames 13 are fixedly connected between the first outer frame body 11 and the second outer frame body 12, an outer frame sealing strip 14 is inserted on the outer side of one of the outer frame connection frames 13, the first outer frame body 11 is provided with an outer frame mounting groove 15, an outer frame body sealing strip 16 is inserted in the outer frame mounting groove 15, the outer frame body sealing strip 16 is tightly fitted with the first inner frame body 21, and the inner frame body sealing strip 29 is tightly fitted with the second outer frame body 12. By setting the outer frame body sealing strip 16, it can be matched with the first inner frame body 21, so as to achieve the sealing between the outer frame assembly 1 and the inner frame assembly 2, and the outer frame sealing strip 14 can be further increased to further improve the overall sealing, and the above-mentioned setting can achieve the effects of rainproof, dustproof and windproof while improving the overall sealing.

[0031] like Figure 1 , 2 As shown in Figures 5 and 6, the window frame assembly 5 comprises a first window frame body 51 and a second window frame body 52, a window frame connecting frame 53 and a window frame sealing pressing frame 54 are fixedly connected between the first window frame body 51 and the second window frame body 52, a window frame extension frame 55 is fixedly connected to the side of the first window frame body 51, a window frame installation groove 56 is provided on the side of the first window frame body 51, a window frame sealing strip 57 is inserted in the window frame installation groove 56, and a window frame extension frame 58 is fixedly connected to the side of the second window frame body 52. ​​The window frame extension frame 58 can support and fix the multi-layer glass assembly 6, the window frame sealing pressing frame 54 can effectively cooperate with the outer frame sealing strip 14 to improve the sealing performance, and the window frame extension frame 55 can fix the multi-layer glass assembly 6 after it is installed, thereby ensuring the stability of the multi-layer glass assembly 6.

[0032] like Figure 1 , 2As shown in Figures 5, 6 and 7, the multi-layer glass assembly 6 includes a plurality of single-layer glass plates 61, and a sandwich partition frame 64 is fixedly connected between the plurality of single-layer glass plates 61. A glass heat preservation frame 66 is fixedly connected to the outer side of the plurality of single-layer glass plates 61. A sandwich sealant 65 is filled and arranged between the glass heat preservation frame 66 and the sandwich partition frame 64. A first glass sealing strip 62 is connected to the single-layer glass plate 61 close to the outside, and the first glass sealing strip 62 is connected to the window frame extension frame 55. A second glass sealing strip 63 is connected to the single-layer glass plate 61 close to the room, and the second glass sealing strip 63 is connected to the window frame extension frame 58. The glass heat preservation frame 66 can ensure the integrity of the plurality of single-layer glass plates 61 and can also insulate the plurality of single-layer glass plates 61. The first glass sealing strip 62 and the second glass sealing strip 63 can increase the sealing performance of the connection with the window frame assembly 5 to prevent the entry of rainwater and dust.

[0033] like Figure 1 , 3 As shown in , 7 and 9, a fixed window assembly 8 is connected between the inner frame assembly 2 and the multi-layer glass assembly 6. The fixed window assembly 8 includes a fixed installation frame 81 and a window sash pressing frame 82. The fixed installation frame 81 is fixedly connected to the second inner frame 22. A matching insert 85 is fixedly connected to the fixed installation frame 81. A matching slot 84 is provided on the window sash pressing frame 82. The fixed installation frame 81 and the window sash pressing frame 82 are plugged and matched by the matching insert 85 and the matching slot 84. The fixed installation frame 81 is provided with a window sash installation groove 83. The first glass sealing strip 62 is matched and connected with the window sash installation groove 83. The second glass sealing strip 63 is matched and connected with the inner frame extension frame 26. The multi-layer glass assembly 6 installed on the inner frame assembly 2 can be fixed by the window sash pressing frame 82 to ensure the stability of the multi-layer glass assembly 6. The first glass sealing strip 62 and the second glass sealing strip 63 are still used to ensure the sealing of the connection to prevent the entry of rainwater and dust.

[0034] like Figure 1 , 2As shown in , 5 and 8, the screen window assembly 7 includes a screen window installation frame 71, a buffer rubber strip 76 is inserted into the side of the screen window installation frame 71, a screen window fixing strip 72 is inserted into the screen window installation frame 71, the screen window installation frame 71 is fixedly connected to a screen cloth 77 through the screen window fixing strip 72, the inner frame extension frame 26 is fixedly connected to two groups of screen window fixing frames 73, one group of the screen window fixing frames 73 is rotatably connected to a screen window rotating frame 74, the screen window rotating frame 74 is fixedly connected to the screen window installation frame 71, a locking switch 75 is fixedly connected to the side of the screen window installation frame 71, and the other group of the screen window fixing frames 73 is cooperatively connected to the locking switch 75. The screen assembly 7 can be opened and closed by the screen rotating frame 74, the screen assembly 7 can be limited and fixed by the locking switch 75, and can be opened quickly and conveniently, the screen cloth 77 can be fixed by the screen fixing strip 72, and the screen fixing strip 72 and the screen installation frame 71 are both provided with a serrated structure, and the serrated structure can increase the friction force, so as to better fix and tighten the screen cloth 77.

[0035] Example 2: When the present application is in an outward-opening design state, refer to Fig.11 , Fig.12 and Fig.13 As shown, the outer side surface of the second outer frame 12 is provided with an outer frame mounting groove 15, and an outer frame sealing strip 16 is inserted into the outer frame mounting groove 15, and the outer frame sealing strip 16 is connected to the second inner frame 22 by interference fit, and the side surface of the first inner frame 21 is provided with an inner frame mounting groove 28, and an inner frame sealing strip 29 is inserted into the inner frame mounting groove 28, and the inner frame sealing strip 29 is connected to the first outer frame 11 by interference fit. When the present application is in an outward opening design state, the inner frame threshold assembly 3 is connected to the fixed threshold assembly 4, the first inner frame 21 has an inner frame installation groove 28, an inner frame sealing strip 29 is inserted into the inner frame installation groove 28, the inner frame sealing strip 29 is interference fit with the first threshold frame 41, the inner frame buffer extension frame 31 is combined and connected with the second inner frame 22, the first buffer bead 34 is matched with the second threshold frame 42, the first inner frame 21 has an inner frame buffer installation groove 32, and the second buffer bead 35 is matched with the first threshold frame 41. The other structures are the same as those in Example 1, and will not be repeated here.

Claims

1. A novel ventilation door structure, characterized in that: The invention comprises an inner frame component (2), wherein the inner frame component (2) is connected to an inner frame threshold component (3), wherein the inner frame component (2) is connected to an outer frame component (1), wherein the inner frame component (2) is connected to a fixed threshold component (4) through the inner frame threshold component (3), wherein the inner frame component (2) comprises a first inner frame body (21) and a second inner frame body (22), wherein an inner frame extension frame (26) is fixedly connected to a side surface of the first inner frame body (21), and an inner frame pressure strip is inserted into the inner frame extension frame (26). (27), an inner frame installation groove (28) is formed on the side of the second inner frame (22), an inner frame sealing strip (29) is inserted into the inner frame installation groove (28), an inner frame connecting frame (23) and an inner frame sealing pressing frame (24) are fixedly connected between the first inner frame (21) and the second inner frame (22), an inner frame sealing strip (25) is clamped on the side of the inner frame connecting frame (23), and the inner frame threshold assembly (3) comprises an inner frame buffer expansion frame (31), the inner frame buffer expansion frame (32) and the inner frame sealing pressing frame (24) are fixedly connected between the first inner frame (21) and the second inner frame (22). The expansion frame (31) is fixedly connected to the first inner frame (21); the inner frame buffer expansion frame (31) is plugged with a first buffer pressure strip (34); the second inner frame (22) is provided with an inner frame buffer installation groove (32); a second buffer pressure strip (35) is plugged into the inner frame buffer installation groove (32); a threshold sealing strip (33) is fixedly connected between the inner frame buffer expansion frame (31) and the inner frame sealing pressure frame (24); the fixed threshold assembly (4) comprises a first threshold frame (41) and a second threshold frame (42); a threshold connection frame (43) is fixedly connected between the first threshold frame (41) and the second threshold frame (42); a threshold sealing strip (44) is fixedly connected to the upper surface of the threshold connection frame (43); the threshold sealing strip (44) and the threshold sealing strip (33) are arranged to be tightly matched; the inner frame assembly (2) is connected with a window frame assembly (5) and a screen window assembly (7); the window frame assembly (5) is connected with a multi-layer glass assembly (6).

2. A novel ventilation door structure according to claim 1, characterized in that: The outer frame assembly (1) comprises a first outer frame body (11) and a second outer frame body (12); two outer frame connection frames (13) are fixedly connected between the first outer frame body (11) and the second outer frame body (12); an outer frame sealing strip (14) is inserted on the outer side of one of the outer frame connection frames (13); the first outer frame body (11) is provided with an outer frame installation groove (15); an outer frame sealing strip (16) is inserted in the outer frame installation groove (15); the outer frame sealing strip (16) is tightly fitted with the first inner frame body (21); and the inner frame sealing strip (29) is tightly fitted with the second outer frame body (12).

3. A novel ventilation door structure according to claim 1, characterized in that: The window frame assembly (5) comprises a first window frame body (51) and a second window frame body (52); a window frame connecting frame (53) and a window frame sealing pressing frame (54) are fixedly connected between the first window frame body (51) and the second window frame body (52); a window frame extension frame (55) is fixedly connected to the side of the first window frame body (51); a window frame installation groove (56) is provided on the side of the first window frame body (51); a window frame sealing strip (57) is inserted into the window frame installation groove (56); and a window frame extension frame (58) is fixedly connected to the side of the second window frame body (52).

4. A novel ventilation door structure according to claim 3, characterized in that: The multi-layer glass assembly (6) comprises a plurality of single-layer glass plates (61), interlayer partition frames (64) are fixedly connected between the plurality of single-layer glass plates (61), glass heat preservation frames (66) are fixedly connected outside the plurality of single-layer glass plates (61), interlayer sealant (65) is filled and arranged between the glass heat preservation frame (66) and the interlayer partition frame (64), a first glass sealing strip (62) is connected to a window frame extension frame (55) in cooperation with a single-layer glass plate (61) close to an outdoor location, a second glass sealing strip (63) is connected to a window frame extension frame (58) in cooperation with a single-layer glass plate (61) close to an indoor location.

5. A novel ventilation door structure according to claim 4, characterized in that: A fixed window assembly (8) is connected between the inner frame assembly (2) and the multi-layer glass assembly (6), the fixed window assembly (8) comprising a fixed installation frame (81) and a window sash pressing frame (82), the fixed installation frame (81) being fixedly connected to the second inner frame (22), a matching insert strip (85) being fixedly connected to the fixed installation frame (81), a matching slot (84) being provided on the window sash pressing frame (82), the fixed installation frame (81) and the window sash pressing frame (82) being plug-fitted and connected via the matching insert strip (85) and the matching slot (84), the fixed installation frame (81) being provided with a window sash mounting groove (83), the first glass sealing strip (62) being matched and connected to the window sash mounting groove (83), and the second glass sealing strip (63) being matched and connected to the inner frame extension frame (26).

6. A novel ventilation door structure according to any one of claims 1 to 5, characterized in that: The screen window assembly (7) comprises a screen window installation frame (71), a buffer rubber strip (76) is inserted into the side of the screen window installation frame (71), a screen window fixing strip (72) is inserted into the screen window installation frame (71), the screen window installation frame (71) is fixedly connected to a screen window cloth (77) via the screen window fixing strip (72), the inner frame extension frame (26) is fixedly connected to two groups of screen window fixing frames (73), one group of the screen window fixing frames (73) is rotatably connected to a screen window rotating frame (74), the screen window rotating frame (74) is fixedly connected to the screen window installation frame (71), a locking switch (75) is fixedly connected to the side of the screen window installation frame (71), and the other group of the screen window fixing frames (73) is cooperatively connected to the locking switch (75).

Images