A profile for ultra-narrow frame unit window and its window structure
By adopting an ultra-narrow frame unit window structure, combined with the design of inner opening hidden fan and splicing profile, the existing doors and windows have large space occupation, high transportation costs, poor sealing and difficult installation during transportation and installation. The problem of this achieves the effect of easy transportation and installation, improving daylighting and sealing performance.
Patent Information
- Application Number
- CN202010937403.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-08
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2040-09-08
AI Technical Summary
During the transportation and installation process, existing doors and windows have problems such as large space occupation, high transportation costs, poor sealing and difficult installation.
The ultra-narrow frame unit window structure is adopted, including ultra-narrow fixed frame and ultra-narrow swing frame, both of which are made of aluminum-clad plastic material. It is made through welding process, combined with the inner opening hidden fan design and splicing profile to achieve a close combination of frame and fan , improve sealing and visual effects.
It is easy to transport and install, reduces transportation costs and installation difficulty, and improves the lighting and sealing performance of the windows, with good visual effects and market prospects.
Smart Images

Figure CN111946199B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of building doors and windows, and in particular to an ultra-narrow frame unit window structure. Background Art
[0002] As people's living standards improve, their demands for doors and windows have changed from pursuing high performance to high performance and extreme visual effects. As a medium for communication and exchange between a room and the outside world, windows not only play the role of lighting and ventilation, but also take into account the effect of energy saving and sealing. In order to better achieve energy-saving effects and reasonably bear the weight of glass, the doors and windows on the market are generally designed to be thicker. From a distance, the frame and sash profiles occupy a large part of the window. A window with an ultra-narrow frame can not only allow people to take in the scenery outside the window as much as possible, but also make the room brighter.
[0003] Before installation, doors and windows need to be transported from the door and window manufacturer to the construction site; the transportation process of doors and windows is generally divided into two types: one is to weld and assemble the frame and pack it, and the sash with glass installed and the glass on the frame are packed separately. Because the frame is assembled, this method occupies a large space, resulting in high freight costs. This transportation method is still relatively common; the other is suitable for windows with screwed frames. The frames are fixed with screws through connectors, and the sash with glass installed and the glass on the frame are packed separately. Although it achieves the purpose of small volume and convenient transportation, the sealing of this screwed window cannot achieve the effect of welded windows, and it is still difficult for on-site workers to assemble it. . Summary of the invention
[0004] The present invention provides an ultra-narrow frame unit window structure, which is easy to transport, reduces transportation costs, is convenient for construction workers to install, and can achieve the purpose of improving the lighting performance of the window.
[0005] At the same time, the present invention also provides a method for transporting and installing the ultra-narrow frame unit window structure.
[0006] A profile for an ultra-narrow frame unit window, characterized in that it comprises an ultra-narrow profile, wherein the ultra-narrow profile comprises an ultra-narrow fixed frame and an ultra-narrow casement frame, both of which are made of aluminum-coated plastic;
[0007] The ultra-narrow fixing frame has an L-shaped cross section as a whole, and a steel liner is fixed in its cavity; a frame aluminum gusset plate mounting portion and a glass mounting portion are formed on one side of the outer surface of the ultra-narrow fixing frame; on the other side, mounting grooves 1 are formed at both ends; and strip mounting grooves are formed on both sides of the glass mounting portion;
[0008] The ultra-narrow casement frame has an L-shaped cross-section as a whole, and a steel liner is fixed in its cavity; a frame aluminum gusset plate mounting portion and a sealing strip mounting groove are formed on one side of the outer surface of the ultra-narrow casement frame; and two mounting grooves are formed at both ends on the other side.
[0009] Furthermore, the ultra-narrow frame unit window profile also includes a splicing profile; a steel lining is arranged in the cavity of the splicing profile; a splicing buckle strip installation groove is formed on one side of the splicing profile; a splicing buckle strip installation groove is formed at one end of the other side, and a hook rib is formed at the other end;
[0010] The ultra-narrow profile and the spliced profile are respectively made by welding technology.
[0011] A fixed window unit structure with an ultra-narrow fixed frame installed, comprising glass, characterized in that it also comprises an ultra-narrow fixed frame and a frame aluminum gusset plate;
[0012] A frame aluminum gusset plate is installed on the outside of the frame aluminum gusset plate installation part of the ultra-narrow fixed frame, and a glass pad is installed on the glass installation part. The glass is installed at the glass pad, and in the strip installation groove of the ultra-narrow fixed frame, a sealing strip is installed in the strip installation groove that contacts the glass, and a glass strip is first installed in the other strip installation groove, and then the sealing strip is installed on the glass strip.
[0013] Furthermore, a raising profile is installed in the installation grooves at both ends of the ultra-narrow fixed frame respectively; an aluminum window cover is installed outside the raising profile at one end of the frame aluminum gusset plate; a fixing plate is installed at the other raising profile, which is in contact and fixed with the raising profile and the ultra-narrow fixed frame respectively; a drainage channel is opened on the profile in the installation groove from the inner corner of the ultra-narrow fixed frame to the side where it is located.
[0014] An opening window unit structure equipped with an ultra-narrow casement frame includes glass, and is characterized in that it also includes an ultra-narrow casement frame, an inner opening hidden sash, and a frame aluminum gusset plate;
[0015] The frame aluminum gusset plate installation part of the ultra-narrow casement frame is installed with a frame aluminum gusset plate, and a sealing strip is installed in the sealing strip installation groove to contact the inner opening hidden fan, and the glass is installed on the inner opening hidden fan by a two-component structural adhesive.
[0016] Furthermore, in the installation grooves two at both ends of the ultra-narrow casement frame, a spliced aluminum buckle strip and an installation angle aluminum are installed in the installation groove two at one end of the frame aluminum buckle plate, and an aluminum window cover is installed on the outside of the spliced aluminum buckle strip and the installation angle aluminum; a window cover buckle strip is installed on the outside of the installation groove two at the other end; and a drainage channel is opened on the profile in the installation groove two from the inner corner of the ultra-narrow casement frame to its side.
[0017] Furthermore, a window cover plate installation opening is formed on the window cover buckle strip, the window cover plate is installed in the window cover plate installation opening, and the special-shaped window cover is installed on the window cover plate.
[0018] Furthermore, one end of the inner opening hidden sash profile as a whole is an inner cantilever, and a glass installation position is formed at one end, and a glass decorative strip installation groove is formed at the end of the glass installation position.
[0019] Furthermore, the glass and the glass decorative strip are fixed with 3M tape.
[0020] An ultra-narrow frame unit window structure, characterized in that it includes a fixed window unit structure with an ultra-narrow fixed frame installed and an opening window unit structure with an ultra-narrow casement frame installed, the positions of installation groove 1 in the ultra-narrow fixed frame and installation groove 2 in the ultra-narrow casement frame correspond to each other, and splicing buckle strips are installed together in installation groove 1 and installation groove 2.
[0021] Furthermore, a splicing profile is installed between the ultra-narrow fixed frame and the ultra-narrow casement frame, and the side where the hook rib is located is in contact with the ultra-narrow fixed frame; the hook rib is installed in the installation groove one of the ultra-narrow fixed frame; the splicing buckle strip is installed in the splicing buckle strip installation groove and the ultra-narrow casement frame installation groove two; in the splicing buckle strip installation groove on the other side of the splicing profile, a splicing buckle strip is respectively installed and connected to the ultra-narrow fixed frame and the ultra-narrow casement frame.
[0022] Furthermore, among the spliced buckle strips, the one on the side of the aluminum buckle plate of the installation frame is a spliced aluminum buckle strip.
[0023] A method for transporting and installing an ultra-narrow frame unit window structure, characterized in that, when leaving the factory, a fixed window unit structure with an ultra-narrow fixed frame installed, an opening window unit structure with an ultra-narrow casement frame installed, and a splicing profile are packaged separately; after being transported to a construction site, the fixed window unit structure, the opening window unit structure, and the splicing profile are fixed with a single-component structural adhesive and stainless steel screws, and at the same time, the inner and outer sides are fixed with a splicing buckle strip and a splicing aluminum buckle strip respectively.
[0024] Beneficial effects of the present invention:
[0025] In the present invention, the width of the profiles of the ultra-narrow fixed frame and the ultra-narrow casement frame that can be observed on the indoor side and the outdoor side is relatively narrow. When they are combined with the inward-opening hidden sash in the present invention, when looking from the outdoor side to the indoor side, the area occupied by the frame is very small, and the frame profile has already blocked the sash profile, so the sash profile cannot be seen, which has a better visual effect. In the inward-opening hidden sash in the present invention, the glass and the sash profile are connected and fixed with a two-component structural adhesive, which changes the technology of using the sash profile to support the weight of the glass in the prior art, and instead uses the glass to support the sash profile and prevent the sash profile from deforming.
[0026] During the production process, the frames and sashes are processed by welding, which greatly improves the watertightness of the windows. At the same time, the ultra-narrow casement frames and ultra-narrow fixed frames both adopt hidden drainage methods, and there is no need to install drainage caps on the outside. Combined with the inward-opening hidden sash design, the window effect is very beautiful and tidy when viewed from the outside.
[0027] Furthermore, during transportation and installation, the present application occupies less space because it is transported in the form of fixed window units and open window units, thus saving transportation costs. During installation, the finished product can be installed using only structural adhesive, stainless steel screws and aluminum buckle strips. This saves installation costs and facilitates installation by construction personnel while ensuring the quality of the window and its consistency from the factory to the finished product, thus having good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the structure of the ultra-narrow fixed frame in the present invention;
[0029] Figure 2 This is a schematic diagram of the ultra-narrow casement frame structure of the present invention;
[0030] Figure 3 It is a schematic diagram of the structure of the spliced profiles in the present invention;
[0031] Figure 4 It is a cross-sectional schematic diagram of the lower horizontal frame of the fixed window unit in the present invention;
[0032] Figure 5 It is a cross-sectional schematic diagram of the lower horizontal frame of the opening window unit in the present invention;
[0033] Figure 6 It is a schematic diagram of the fan-shaped material structure in the present invention;
[0034] Figure 7 It is a schematic diagram of a longitudinal frame cross section of an ultra-narrow frame unit window in the present invention;
[0035] Figure 8 It is another longitudinal frame cross-section schematic diagram of the ultra-narrow frame unit window in the present invention.
[0036] In the figure: 1. Ultra-narrow fixed frame; 1.1. Frame aluminum gusset plate installation part; 1.2. Glass installation part; 1.3. Installation slot 1; 2. Ultra-narrow casement frame; 2.1. Sealing strip installation slot; 2.2. Installation slot 2; 3. Steel lining; 4. Splicing profile; 4.1. Splicing buckle strip installation slot; 4.2. Hook bar; 5. Aluminum window cover; 6. Frame aluminum gusset plate; 7. Glass spacer; 8. Glass; 9. Glass pressure strip; 10. Raising profile; 11. Fixing plate; 12. Inward opening hidden sash; 13. Splicing aluminum buckle strip; 14. Installing angle aluminum; 15. Window frame buckle strip; 16. Window frame plate; 17. Special-shaped window frame; 18. Two-component structural adhesive; 19. Glass decorative strip; 20. 3M tape; 21. Splicing buckle strip one; 22. Splicing buckle strip two; 23. Sash profile; 23.1. Inner cantilever; 23.2. Glass decorative strip installation groove;. DETAILED DESCRIPTION
[0037] Example 1
[0038] See attached Figure 1-3 , a profile for an ultra-narrow frame unit window, characterized in that it comprises an ultra-narrow profile, wherein the ultra-narrow profile comprises an ultra-narrow fixed frame 1 and an ultra-narrow casement frame 2, both of which are made of aluminum-coated plastic;
[0039] The ultra-narrow fixing frame 1 has an L-shaped cross section as a whole, and a steel liner 3 is fixed in its cavity; a frame aluminum gusset plate mounting portion 1.1 and a glass mounting portion 1.2 are formed on one side of the outer surface of the ultra-narrow fixing frame 1; rubber strip mounting grooves are formed on both sides of the glass mounting portion 1.2; and mounting grooves 1.3 are formed at both ends of the other side;
[0040] The ultra-narrow casement frame 2 has an L-shaped cross-section as a whole, and a steel liner 3 is fixed in its cavity; a frame aluminum gusset plate mounting portion and a sealing strip mounting groove 2.1 are formed on one side of the outer surface of the ultra-narrow casement frame; and mounting grooves 2.2 are formed at both ends on the other side.
[0041] The ultra-narrow frame unit window profile also includes a splicing profile 4; a steel lining 3 is arranged in the splicing profile cavity; a splicing buckle strip installation groove 4.1 is formed on one side of the splicing profile; on the other side, a splicing buckle strip installation groove 4.1 is formed at one end, and a hook rib 4.2 is formed at the other end.
[0042] Example 2
[0043] See attached Figure 4 A fixed window unit structure with an ultra-narrow fixed frame, comprising glass 8, characterized in that it also comprises an ultra-narrow fixed frame 1 and a frame aluminum gusset plate 6;
[0044] A frame aluminum gusset plate 6 is installed on the outside of the frame aluminum gusset plate installation part 1.1 of the ultra-narrow fixed frame 1, and a glass pad 7 is installed on the glass installation part 1.2, and the glass 8 is installed at the glass pad 7, and in the rubber strip installation groove of the ultra-narrow fixed frame 1: a sealing strip is installed in the rubber strip installation groove that contacts the glass 8, and a glass strip 9 is first installed in the other rubber strip installation groove, and then a sealing strip is installed on the glass strip 9.
[0045] A heightening profile 10 is installed in the mounting grooves 1.3 at both ends of the ultra-narrow fixed frame respectively; an aluminum window cover 5 is installed outside the heightening profile at one end of the frame aluminum gusset plate; a fixing plate 11 is installed at the other heightening profile, which is in contact and fixed with the heightening profile 10 and the ultra-narrow fixed frame 1 respectively; a drainage channel is opened on the profile in the mounting groove from the inner corner of the ultra-narrow fixed frame 1 to its side.
[0046] Example 3
[0047] See attached Figure 5, an opening window unit structure equipped with an ultra-narrow casement frame, including glass 8, characterized in that it also includes an ultra-narrow casement frame 2, an inner opening hidden fan 12, and a frame aluminum gusset plate 6;
[0048] The frame aluminum gusset plate 6 is installed on the frame aluminum gusset plate installation part of the ultra-narrow casement frame 2, and a sealing strip is installed in the sealing strip installation groove 2.1 to contact the inner opening hidden sash 12, and the inner opening hidden sash 12 is installed with glass 8. The glass is installed on the inner opening hidden sash 12 by a two-component structural adhesive 18, and the glass decorative strip 19 is fixed to the glass 8 by a 3M tape 20.
[0049] In the mounting grooves 2.2 at both ends of the ultra-narrow casement frame, a spliced aluminum buckle strip 13 and an installation angle aluminum 14 are installed in the mounting groove 2.2 at one end of the frame aluminum buckle plate 6, and an aluminum window cover 5 is installed on the outside of the spliced aluminum buckle strip 13 and the installation angle aluminum 14; a window cover buckle strip 15 is installed on the outside of the mounting groove 2.2 at the other end.
[0050] The window cover buckle strip 15 is formed with a window cover board installation opening, the window cover board 16 is installed in the window cover board installation opening, and the special-shaped window cover 17 is installed on the window cover board.
[0051] In the installation groove 2.2 from the inner corner of the ultra-narrow casement frame 2 to the side where the installation groove 2 is located, a drainage channel is opened on the profile.
[0052] One end of the inner opening hidden sash profile 23 is an inner cantilever 23.1, and a glass installation position is formed at one end. A glass decorative strip installation groove 23.2 is formed at the end of the glass installation position.
[0053] Example 4
[0054] See attached Figure 7 An ultra-narrow frame unit window structure, characterized in that it includes a fixed window unit structure installed with an ultra-narrow fixed frame and an opening window unit structure installed with an ultra-narrow casement frame, the positions of the mounting groove 1.3 in the ultra-narrow fixed frame 1 and the mounting groove 2.2 in the ultra-narrow casement frame correspond to each other, and a splicing buckle strip 1 21 and a splicing buckle strip 2 22 are installed together in the mounting groove 1.3 and the mounting groove 2.2; the splicing buckle strip 2 22 is located on the aluminum buckle plate side of the mounting frame.
[0055] The fixed window unit structure equipped with the ultra-narrow fixed frame and the opening window unit structure equipped with the ultra-narrow casement frame are fixed by using a single-component structural adhesive and stainless steel screws.
[0056] Example 5
[0057] On the basis of the structure of Example 4, a splicing profile 4 is installed between the ultra-narrow fixed frame and the ultra-narrow casement frame, and the side where the hook rib 4.2 is located is in contact with the ultra-narrow fixed frame 1; the hook rib 4.1 is installed in the installation groove 1.3 of the ultra-narrow fixed frame 2; the splicing buckle strip 1 21 is installed in the splicing buckle strip installation groove 4.1 and the ultra-narrow casement frame installation groove 2.2; in the splicing buckle strip installation groove 4.1 on the other side of the splicing profile 4, a splicing buckle strip 2 22 is installed and connected to the ultra-narrow fixed frame 1 and the ultra-narrow casement frame 2 respectively.
[0058] The fixed window unit structure equipped with the ultra-narrow fixed frame, the opening window unit structure equipped with the ultra-narrow casement frame, and the spliced profiles are fixed by using a single-component structural adhesive and stainless steel screws.
[0059] Example 6
[0060] A method for transporting and installing an ultra-narrow frame unit window structure, characterized in that the fixed window unit structure and the open window unit structure are packaged separately when leaving the factory; after being transported to the construction site, they are fixed with single-component structural adhesive and stainless steel screws, and splicing buckle strips and splicing aluminum buckle strips are installed.
[0061] In a specific implementation, the size of the ultra-narrow fixing frame may be 90cm*29cm*51cm, wherein 29cm and 51cm are the widths of the profile visible on the indoor side and the outdoor side, respectively, while the size of the profile in the prior art is 90cm*64cm*85cm, wherein 64cm and 85cm are the widths of the profile visible on the indoor side and the outdoor side, respectively;
[0062] The size of the ultra-narrow casement frame can be 90cm*20cm*40cm, where 20cm and 40cm are the profile widths visible on the indoor and outdoor sides respectively, while the profile size in the prior art is 70cm*47cm*68cm, where 47cm and 68cm are the profile widths visible on the indoor and outdoor sides respectively.
Claims
1. A profile for ultra-narrow frame unit window, characterized in that: It includes ultra-narrow profiles, and the ultra-narrow profiles include ultra-narrow fixed frames and ultra-narrow casement frames, both of which are made of aluminum-coated plastics; The ultra-narrow fixing frame has an L-shaped cross section as a whole, and a steel liner is fixed in its cavity; a frame aluminum gusset plate mounting portion and a glass mounting portion are formed on one side of the outer surface of the ultra-narrow fixing frame; on the other side, mounting grooves 1 are formed on the left and right sides along the length direction of the ultra-narrow fixing frame; and rubber strip mounting grooves are formed on both sides of the glass mounting portion; The ultra-narrow casement frame has an L-shaped cross section as a whole, and a steel liner is fixed in its cavity; a frame aluminum gusset plate mounting portion and a sealing strip mounting groove are formed on one side of the outer surface of the ultra-narrow casement frame; two sealing strip mounting grooves are provided; on the other side, two mounting grooves are formed on the left and right sides along the length direction of the ultra-narrow casement frame respectively; The ultra-narrow frame unit window profile also includes a splicing profile; a steel lining is arranged in the cavity of the splicing profile; a splicing buckle strip installation groove is formed on one side of the splicing profile; a splicing buckle strip installation groove is formed at one end of the other side, and a hook rib is formed at the other end; The ultra-narrow profile and the splicing profile are respectively made by welding process; when in use, the ultra-narrow fixing frame can be directly used in conjunction with the ultra-narrow casement frame, at this time, the positions of the installation groove one in the ultra-narrow fixing frame and the installation groove two in the ultra-narrow casement frame correspond to each other, and the splicing buckle strips are installed in the installation groove one and the installation groove two; the ultra-narrow fixing frame can also be used in conjunction with the ultra-narrow casement frame through the splicing profile, at this time, the splicing profile is installed between the ultra-narrow fixing frame and the ultra-narrow casement frame, and the side where the hook rib is located is in contact with the ultra-narrow fixing frame; the hook rib is installed in the installation groove one of the ultra-narrow fixing frame; the splicing buckle strip is installed in the splicing buckle strip installation groove and the ultra-narrow casement frame installation groove two; in the splicing buckle strip installation groove on the other side of the splicing profile, the splicing buckle strip is respectively installed and connected to the ultra-narrow fixing frame and the ultra-narrow casement frame.
2. An ultra-narrow frame unit window structure, characterized in that: It comprises a fixed window unit structure and an opening window unit structure installed with the ultra-narrow frame unit window profile according to claim 1; The fixed window unit structure includes glass and an aluminum frame gusset plate of an ultra-narrow fixed frame; the aluminum frame gusset plate of the ultra-narrow fixed frame is installed outside the mounting portion of the aluminum frame gusset plate of the ultra-narrow fixed frame, and a glass pad is installed on the glass mounting portion, the glass is installed at the glass pad, and a sealing rubber strip is installed in a rubber strip mounting groove of the ultra-narrow fixed frame, in a rubber strip mounting groove contacting the glass, a glass bead is first installed in another rubber strip mounting groove, and then a sealing rubber strip is installed on the glass bead; In the installation grooves at both ends of the ultra-narrow fixed frame, a padding profile is installed respectively; an aluminum window cover is installed outside the padding profile at one end of the frame aluminum gusset plate; a fixing plate is installed at the other padding profile, which is in contact and fixed with the padding profile and the ultra-narrow fixed frame respectively; in the installation groove from the inner corner of the ultra-narrow fixed frame to the side where it is located, a drainage channel is opened on the profile; The opening window unit structure includes glass, and also includes an inner opening hidden sash and an aluminum gusset plate of an ultra-narrow casement frame; The frame aluminum gusset plate of the ultra-narrow casement frame is installed on the frame aluminum gusset plate installation part of the ultra-narrow casement frame, and a sealing strip is installed in the sealing strip installation groove to contact the inner opening hidden sash, and the glass is installed on the inner opening hidden sash by a two-component structural adhesive; In the second installation groove at both ends of the ultra-narrow casement frame, a spliced aluminum buckle strip and an installation angle aluminum are installed in the second installation groove at one end of the frame aluminum buckle plate, and an aluminum window cover is installed on the outside of the spliced aluminum buckle strip and the installation angle aluminum; a window cover buckle strip is installed on the outside of the second installation groove at the other end; in the second installation groove from the inner corner of the ultra-narrow casement frame to the side where it is located, a drainage channel is opened on the profile; The window cover buckle strip is formed with a window cover plate installation opening, the window cover plate is installed in the window cover plate installation opening, and the special-shaped window cover is installed on the window cover plate; one end of the inner opening hidden sash profile as a whole is an inner cantilever, and a glass installation position is formed at one end, and a glass decorative strip installation groove is formed at the end of the glass installation position; the glass and the glass decorative strip are fixed with 3M tape; The positions of the installation slot 1 in the ultra-narrow fixed frame and the installation slot 2 in the ultra-narrow casement frame correspond to each other, and the splicing buckle strips are installed in the installation slot 1 and the installation slot 2 together.
3. The ultra-narrow frame unit window structure according to claim 2, characterized in that: A splicing profile is installed between the ultra-narrow fixed frame and the ultra-narrow casement frame, and the side where the hook rib is located is in contact with the ultra-narrow fixed frame; the hook rib is installed in the installation groove 1 of the ultra-narrow fixed frame; the splicing buckle strip is installed in the splicing buckle strip installation groove and the ultra-narrow casement frame installation groove 2; in the splicing buckle strip installation groove on the other side of the splicing profile, a splicing buckle strip is installed and connected to the ultra-narrow fixed frame and the ultra-narrow casement frame respectively.
4. A method for transporting and installing the ultra-narrow frame unit window structure according to claim 2, characterized in that: When leaving the factory, the fixed window unit structure with an ultra-narrow fixed frame, the opening window unit structure with an ultra-narrow casement frame and the splicing profiles are packaged separately; after being transported to the construction site, the fixed window unit structure, the opening window unit structure and the splicing profiles are fixed with a single-component structural adhesive and stainless steel screws, and at the same time, the inner and outer sides are fixed with splicing buckle strips and splicing aluminum buckle strips respectively.
Citation Information
Patent Citations
Section bar for ultra-narrow frame unit window and window structure thereof
CN212478916U