Corner reinforcer

By designing a combination of an L-shaped plate-like reinforcing component and a sealing part, the problem of incomplete sealing of the gaps at the T-shaped joints in aluminum alloy doors and windows was solved, achieving better sealing effect and connection strength, and improving the overall performance of doors and windows.

CN223536241UActive Publication Date: 2025-11-11DEXENKE DOOR & WINDOW SYST (SUZHOU) CO LTD
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Patent Information

Application Number
CN202423020529.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-11-11
Estimated Expiration
2034-12-06

AI Technical Summary

Technical Problem

The gaps at the T-shaped joints of existing aluminum alloy doors and windows are not properly sealed, causing rainwater to seep into the room. Furthermore, the manual application of sealant is unsightly and prone to cracking.

Method used

A corner reinforcement is designed, including an L-shaped plate-like reinforcement base, multiple sealing parts and glue injection holes, which are glued to the splice joint between the window frame and the mullion to achieve a thorough seal, and the connection strength is improved through structural optimization.

Benefits of technology

It improves the airtightness and watertightness of doors and windows, enhances connection strength, facilitates installation, improves construction efficiency, and has a good aesthetic appeal.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of door and window accessories, in particular to a corner reinforcing piece. The corner reinforcer is in an L shape, the structure of the corner reinforcer is arranged in a bilateral symmetry mode, the corner reinforcer comprises an L-shaped platy reinforcer base body, a plurality of sealing parts are arranged below the reinforcer base body, the sealing parts communicate with glue injection holes, and the glue injection holes are formed in the reinforcer base body; sealant is injected into the sealing part through the sealant injection hole so as to seal a splicing seam formed by splicing the cantilever of the window frame and the end of the main body of the mullion and seal a window frame cantilever rubber strip groove communicated with the sealing part; or the sealant is injected into the sealing part through the sealant injection hole to seal the corner combining splicing seam of the window frame; according to the utility model, the structure is more optimized, the splicing seam formed by splicing the cantilever of the window frame and the end part of the main body of the mullion and the corner splicing seam of the window frame are sealed, the air tightness and water tightness of the whole window are improved, the installation is convenient, and the working efficiency of constructors is improved.
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Description

Technical Field

[0001] This utility model relates to the field of door and window accessories technology, and in particular to a corner reinforcement. Background Technology

[0002] The T-joint of the mullion in existing aluminum alloy doors and windows is a weak point in the overall sealing of the doors and windows. Because the profiles are spliced ​​and exposed, if the joints of the profile sections are not properly sealed, rainwater will seep into the room through the gaps, damaging the interior decoration. The general sealing treatment for the mullion joint is to install a sealing pillow at the end of the mullion joint. However, the sealing pillow cannot cover all the gaps, especially the gap formed where the mullion is spliced ​​to the window frame profile and connected to the cantilever of the window frame. This is the key point for the overall sealing of the doors and windows. The current treatment for this gap is to manually apply sealant. However, manual application of sealant affects the appearance and is not strong enough to withstand cracking. There is an urgent need for a corner reinforcement to solve the problems existing in the current technology. Utility Model Content

[0003] The purpose of this utility model is to provide a corner reinforcement to solve the problem in the prior art where the gap formed by the splicing of the mullion on the window frame profile and the connection between the mullion and the cantilever of the window frame is sealed by manually applying sealant, which is not only unsightly but also has insufficient strength and the sealant is prone to cracking.

[0004] The technical solution of this utility model is: a corner reinforcement, glued to the splice joint formed by the end of the cantilever and the main body of the mullion of the window frame, or glued to the corner splice joint of the window frame; the cantilever is formed by the extension of the frame profile, and its structure includes a plate-shaped cantilever body, and a first profile with a rectangular vertical section protruding from the cantilever body, a second profile with a T-shaped vertical section protruding from the cantilever body, and a third profile with an L-shaped vertical section protruding from the cantilever body, the length of the first profile, the second profile, and the third profile are all parallel to the length of the cantilever body; the first profile, the cantilever body, and the frame profile together form a first groove, the second profile, the cantilever body, and the first profile together form a second groove, and the third profile, the cantilever body, and the second profile together form a cantilever adhesive strip groove;

[0005] The corner reinforcement is L-shaped and symmetrically arranged. The corner reinforcement includes an L-shaped plate-shaped reinforcement base. Multiple sealing parts are provided below the reinforcement base, and each sealing part is connected to an injection hole. The injection holes are located on the reinforcement base. Sealant is injected into the sealing parts through the injection holes to seal the joint formed by the end splicing of the cantilever and the main body of the mullion of the window frame, and to seal the window frame cantilever rubber strip groove connected to the sealing part; or, sealant is injected into the sealing parts through the injection holes to seal the corner splicing joint of the window frame.

[0006] Preferably, the lower end of the reinforcing member base extends downward to form multiple support rails, and the multiple support rails and the reinforcing member base together form a first sealing part located in the middle, a second sealing part and a third sealing part symmetrically located on both sides of the first sealing part;

[0007] The multiple support rails forming the second and third sealing parts are respectively provided with a first clearance groove and a second clearance groove for avoiding the second and third profiles;

[0008] The portion of the reinforcing member substrate that forms the first sealing part has a first glue injection hole that extends vertically through it; the portion of the reinforcing member substrate that forms the second sealing part has a second glue injection hole that extends vertically through it; and the portion of the reinforcing member substrate that forms the third sealing part has a third glue injection hole that extends vertically through it.

[0009] A boss is provided at the corner edge where the reinforcing member base contacts the frame profile. Starting from the root of the multiple support railings and ending at the vertical side wall of the boss, a first inclined surface, a second inclined surface, and a third inclined surface are provided obliquely upward. The first inclined surface is located at the intersection of the second and third inclined surfaces. The first, second, and third inclined surfaces are all recessed relative to the reinforcing member base to form a fourth sealing part, a fifth sealing part, and a sixth sealing part, respectively. The fourth, fifth, and sixth sealing parts are interconnected. The first sealing part is connected to the fourth, fifth, and sixth sealing parts, the second sealing part is connected to the fifth sealing part, and the third sealing part is connected to the sixth sealing part.

[0010] Preferably, the reinforcing member base includes a square connecting plate, and rectangular first side plates and second side plates symmetrically connected on both sides of the connecting plate. The length directions of the first side plates and the second side plates are perpendicular to each other, and the width of the first side plate is equal to the minimum distance between the frame profile and the second profile.

[0011] Preferably, the plurality of support railings on the lower end face of the first side plate include a U-shaped first support railing and a second support railing located between the first and second clearance grooves. The opening of the first support railing faces the connecting plate, and the width and length of the first support railing are parallel to the width and length of the first side plate, respectively. The second support railing is a cubic block. The first and second support railings are arranged along the circumferential edge of the first side plate, and the first support railing completely avoids the first profile.

[0012] Preferably, the plurality of support railings on the lower end face of the connecting plate include a third, fourth, fifth, and sixth support railings arranged symmetrically on the left and right sides. The third and fifth support railings are L-shaped, and the fourth and sixth support railings are cubic. The third support railing includes a first part parallel to the width of the first side plate and a second part parallel to the length of the first side plate. The fifth support railing includes a third part parallel to the width of the first side plate and a fourth part parallel to the length of the first side plate.

[0013] Preferably, the width of the outer wall of the first support fence in the width direction and the vertical distance between the outer walls of the second and fourth parts are both equal to the width of the second groove opening.

[0014] Preferably, when the corner reinforcement is installed at the joint formed by splicing the end of the cantilever and the main body of the mullion of the window frame, the second or third glue injection hole is located directly above the glue strip groove of the cantilever of the window frame.

[0015] Preferably, a retaining protrusion is provided at the bottom of the surface of the first side plate that contacts the second profile.

[0016] Preferably, the first injection hole, the second injection hole, and the third injection hole are all conical in shape with a larger opening at the top and a smaller opening at the bottom.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model discloses a corner reinforcement component, comprising an L-shaped plate-like reinforcement base. Multiple sealing portions are disposed below the reinforcement base, each connected to an injection hole located on the reinforcement base. Multiple support rails extend downwards from the lower end of the reinforcement base, forming a first sealing portion in the center and second and third sealing portions symmetrically located on either side of the first sealing portion. The support rails forming the second and third sealing portions are respectively provided with first and second clearance grooves to allow for the avoidance of second and third profiles. The structure is more optimized, sealing the joints formed by the end splicing of the cantilever and mullion of the window frame, as well as the corner splicing joints of the window frame, improving the airtightness and watertightness of the entire window. Installation is convenient, increasing the work efficiency of construction personnel. Simultaneously, it enhances the connection strength between the window frame and mullion, as well as the connection strength of the window frame corners, making it highly practical. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a front structural diagram of a corner reinforcement member described in this embodiment;

[0021] Figure 2 This is a first-view structural diagram of the reverse side structure of a corner reinforcement member described in this embodiment;

[0022] Figure 3 This is a second-view structural diagram of the reverse side structure of a corner reinforcement member described in this embodiment;

[0023] Figure 4 for Figure 1 Top view;

[0024] Figure 5 for Figure 1 A bottom view;

[0025] Figure 6 for Figure 4 Front view;

[0026] Figure 7 for Figure 4 The left view;

[0027] Figure 8 This is a schematic diagram of the T-shaped connection structure between the window frame and the mullion described in this embodiment;

[0028] Figure 9 This is a schematic diagram of the corner assembly structure of the window frame described in this embodiment;

[0029] Figure 10 This is a cross-sectional view of the profiles for the window frame and mullion described in this embodiment;

[0030] Figure 11 This is a structural diagram of the corner reinforcement described in this embodiment when it is used at the joint formed by splicing the end of the cantilever and the main body of the mullion of the window frame;

[0031] Figure 12 This is a structural diagram illustrating the use of corner reinforcement members at the corner joints of the window frame as described in this embodiment.

[0032] The components include: 1. Window frame, 2. Cantilever, 3. Mullion, 4. Joint, 5. Corner joint, 6. Frame profile, 7. First profile, 8. Second profile, 9. Third profile, 10. First groove, 11. Second groove, 12. Cantilever rubber strip groove, 13. First sealing part, 14. Second sealing part, 15. Third sealing part, 16. First clearance groove, 17. Second clearance groove, 18. First injection hole, 19. Second injection hole, 20. Third injection hole, 21. Boss, 22. Fourth sealing part. 3. Fifth sealing part; 24. Sixth sealing part; 25. Connecting plate; 26. First side plate; 27. Second side plate; 28. Protrusion; 29. ​​First leg guardrail; 30. Second leg guardrail; 31. Third leg guardrail; 32. First part; 33. Second part; 34. Fourth leg guardrail; 35. Fifth leg guardrail; 36. Third part; 37. Fourth part; 38. Sixth leg guardrail; 39. Seventh leg guardrail; 40. Eighth leg guardrail; 41. Third clearance groove; 42. Fourth clearance groove. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to specific embodiments:

[0034] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0035] A corner reinforcement is glued to the joint 4 formed by splicing the cantilever 2 and the main body of the mullion 3 of the window frame 1 (e.g., Figure 8 As shown), or glued to the corner joint 5 of the window frame 1 (as shown). Figure 9 (as shown); Figure 8 As shown, the cantilever 2 is formed by extending the frame profile 6. Its structure includes a plate-shaped cantilever body, and sequentially protruding from the cantilever body: a first profile 7 with a rectangular vertical cross-section, a second profile 8 with a T-shaped vertical cross-section, and a third profile 9 with an L-shaped vertical cross-section. The lengths of the first profile 7, the second profile 8, and the third profile 9 are all parallel to the length of the cantilever body. Figure 10As shown, the first profile 7, together with the cantilever body and the frame profile 6, forms the first groove 10; the second profile 8, together with the cantilever body and the first profile 7, forms the second groove 11; and the third profile 9, together with the cantilever body and the second profile 8, forms the cantilever rubber strip groove 12.

[0036] like Figures 1-7 As shown, the corner reinforcement is L-shaped and its structure is symmetrically arranged. The symmetrical structure allows the corner reinforcement to be used at the left and right corners of the T-shaped connection structure between the window frame 1 and the mullion 3. The corner reinforcement includes an L-shaped plate-shaped reinforcement base. Multiple sealing parts are provided below the reinforcement base. Each sealing part is connected to an injection hole, which is opened on the reinforcement base. Multiple support rails extend downward from the lower end of the reinforcement base. The multiple support rails and the reinforcement base enclose a first sealing part 13 located in the middle, a second sealing part 14 and a third sealing part 15 symmetrically located on both sides of the first sealing part 13. The multiple support rails forming the second sealing part 14 and the third sealing part 15 are respectively provided with a first clearance groove 16 and a second clearance groove 17 for avoiding the second profile 8 and the third profile 9.

[0037] A first glue injection hole 18 is vertically opened through the portion of the reinforcing component substrate forming the first sealing part 13; a second glue injection hole 19 is vertically opened through the portion of the reinforcing component substrate forming the second sealing part 14; and a third glue injection hole 20 is vertically opened through the portion of the reinforcing component substrate forming the third sealing part 15. The first glue injection hole 18, the second glue injection hole 19, and the third glue injection hole 20 are all conical in shape with a larger opening at the top and a smaller opening at the bottom. Compared with conventional cylindrical through holes, the conical shape of the glue injection hole allows the glue injection hole to fit more closely with the nozzle of the glue gun, and the glue injection hole will not overflow during the glue application process.

[0038] A boss 21 is provided at the corner where the reinforcing member base contacts the frame profile 6. Starting from the root of the multiple support railings and ending at the vertical side wall of the boss 21, a first inclined surface, a second inclined surface, and a third inclined surface are provided obliquely upward. The first inclined surface is located at the intersection of the second and third inclined surfaces. The first, second, and third inclined surfaces are all recessed relative to the reinforcing member base to form a fourth sealing part 22, a fifth sealing part 23, and a sixth sealing part 24, respectively. The fourth sealing part 22, the fifth sealing part 23, and the sixth sealing part 24 are interconnected. The first sealing part 13 is connected to the fourth sealing part 22, the fifth sealing part 23, and the sixth sealing part 24, the second sealing part 14 is connected to the fifth sealing part 23, and the third sealing part 15 is connected to the sixth sealing part 24.

[0039] The reinforcing component base includes a square connecting plate 25, and rectangular first side plates 26 and second side plates 27 symmetrically connected on both sides of the connecting plate 25. The lengths of the first side plates 26 and second side plates 27 are perpendicular to each other, and the width H of the first side plate 26 is (e.g., ...). Figure 4 As shown) is equal to the minimum spacing I between frame profile 6 and second profile 8 (e.g. Figure 10 As shown, since the reinforcing member base is symmetrical, the width of the second side plate 27 is equal to the minimum distance between the frame profile 6 and the second profile 8. The bottom of the surface of the first side plate 26 that contacts the second profile 8 is provided with a locking protrusion 28; in this way, the first side plate 26 and the second side plate 27 are locked between the frame profile 6 and the second profile 8, making the corner reinforcing member easy to install.

[0040] The lower end face of the first side plate 26 includes multiple support railings, including a U-shaped first support railing 29 and a second support railing 30 located between the first clearance groove 16 and the second clearance groove 17. The opening of the first support railing 29 faces the connecting plate 25, and the width and length of the first support railing 29 are parallel to the width and length of the first side plate 26, respectively. The second support railing 30 is a cubic block, and the first support railing 29 and the second support railing 30 are arranged along the circumferential edge of the first side plate 26. The width of the outer wall of the first support railing 29 and the vertical distance J between the outer walls of the second part 33 and the fourth part 37 are (e.g., Figure 5 As shown) are all equal to the width K of the second slot 11 opening (e.g. Figure 10 As shown), the first foot fence 29, the third foot fence 31, and the fifth foot fence 35 are locked in the second groove 11; due to the symmetrical design of the first side plate 26 and the second side plate 27, the multiple foot fences on the lower end face of the second side plate 27 include the U-shaped seventh foot fence 39 and the eighth foot fence 40 located between the third clearance groove 41 and the fourth clearance groove 42. The lower end face of the connecting plate 25 includes multiple support rails, including a third support rail 31, a fourth support rail 34, a fifth support rail 35, and a sixth support rail 38 arranged symmetrically on both sides. The third support rail 31 and the fifth support rail 35 are L-shaped, while the fourth support rail 34 and the sixth support rail 38 are cubic. The third support rail 31 includes a first part 32 parallel to the width of the first side plate 26 and a second part 33 parallel to the length of the first side plate 26. The fifth support rail 35 includes a third part 36 parallel to the width of the first side plate 26 and a fourth part 37 parallel to the length of the first side plate 26. The support rails serve as diagonal reinforcements and simultaneously intercept fluid sealant, directing the sealant to the area requiring sealing.

[0041] When corner reinforcements are used at the joint 4 formed by the end of the cantilever 2 of the window frame 1 and the main body of the mullion 3, the window frame 1 and the mullion 3 form a T-shaped fixed connection structure. The end of the main body of the mullion 3 is spliced ​​onto the window frame 1. Two joints 4 are formed on both sides of the cantilever 2 of the window frame 1 and the mullion 3. The profile structures of the window frame 1 and the mullion 3 are the same. When sealing the joint 4 formed by the end of the cantilever 2 of the window frame 1 and the main body of the mullion 3, two corner reinforcements are required. The two corner reinforcements are symmetrically installed on both sides of the connection between the mullion 3 and the window frame 1. Taking one corner reinforcement as an example, the installation method is as follows: Figure 11 As shown, the corner reinforcement is installed on the left side of the connection between the mullion 3 and the window frame 1. First, the first side plate 26, connecting plate 25, and second side plate 27 of the corner reinforcement are pressed against the inner wall of the frame profile 6 of the window frame 1 and the mullion 3. Then, the reinforcement base is pressed firmly so that the locking protrusion 28 of the first side plate 26 is locked in the second groove 11 of the mullion 3, and the locking protrusion 28 of the second side plate 27 is locked in the second groove 11 of the window frame 1. This completes the installation and fixation of the corner reinforcement at the connection between the window frame 1 and the mullion 3. At this time, the second support railing 30 is inserted into the cantilever rubber strip groove 12 of the window frame 1. The second profile 8 and the third profile 9 of the window frame 1 are respectively inserted into the first clearance groove 16 and the second clearance groove 17 of the corner reinforcement. The second glue injection hole 19 is located directly above the cantilever rubber strip groove 12 of the window frame 1. Sealant is injected through injection holes 18 and 19. The sealant from injection hole 18 flows through first sealing part 13 to fourth sealing part 22, fifth sealing part 23, and sixth sealing part 24. The sealant from injection hole 19 flows through second sealing part 14 to sixth sealing part 24 and cantilever rubber strip groove 12 of window frame 1. This achieves the sealing of the joint 4 formed by the splicing of the cantilever 2 and the mullion 3 of the main body of window frame 1 through injection holes, and the sealing of the cantilever rubber strip groove 12 of window frame 1 connected to the sealing part. The sealant seals the most important sealing part at the splicing of the cantilever 2 and the mullion 3 of window frame 1. It also works in conjunction with the sealing pillow installed in the profile groove to prevent rainwater from flowing down the window frame 1 into the room through the splice 4.

[0042] When the corner reinforcement is used at the corner joint 5 of window frame 1, as shown in the figure, the base of the corner of window frame 1 needs to be sealed, i.e. Figure 12As shown, the specific installation method is as follows: First, press the first side plate 26, connecting plate 25, and second side plate 27 of the corner reinforcement against the inner wall of the frame profile 6 of the window frame 1. Then, press the reinforcement base firmly so that the locking protrusions 28 of the first side plate 26 and the second side plate 27 are both locked in the second groove 11 of the window frame 1, thus completing the installation and fixing of the corner reinforcement at the corner of the window frame 1. Inject sealant into the first injection hole 18. The sealant from the first injection hole 18 flows through the first sealing part 13 to the fourth sealing part 22, the fifth sealing part 23, and the sixth sealing part 24, thereby sealing the corner splice seam 5 of the window frame 1.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A corner reinforcement member, characterized in that: The adhesive is applied to the joint formed at the end of the cantilever and the main body of the mullion of the window frame, or to the corner joint of the window frame; the cantilever is formed by extending the frame profile, and its structure includes a plate-shaped cantilever body, and a first profile with a rectangular vertical section, a second profile with a T-shaped vertical section, and a third profile with an L-shaped vertical section, which are sequentially protruding from the cantilever body. The length of the first, second, and third profiles is parallel to the length of the cantilever body; the first profile, the cantilever body, and the frame profile together form a first groove, the second profile, the cantilever body, and the first profile together form a second groove, and the third profile, the cantilever body, and the second profile together form a cantilever adhesive strip groove; The corner reinforcement is L-shaped and symmetrically arranged. The corner reinforcement includes an L-shaped plate-shaped reinforcement base. Multiple sealing parts are provided below the reinforcement base, and each sealing part is connected to an injection hole. The injection holes are located on the reinforcement base. Sealant is injected into the sealing parts through the injection holes to seal the joint formed by the end splicing of the cantilever and the main body of the mullion of the window frame, and to seal the window frame cantilever rubber strip groove connected to the sealing part; or, sealant is injected into the sealing parts through the injection holes to seal the corner splicing joint of the window frame.

2. A corner reinforcement member according to claim 1, characterized in that: Multiple support rails extend downward from the lower end of the reinforcing member base. The multiple support rails and the reinforcing member base together form a first sealing part located in the middle, a second sealing part and a third sealing part symmetrically located on both sides of the first sealing part. The multiple support rails forming the second and third sealing parts are respectively provided with a first clearance groove and a second clearance groove for avoiding the second and third profiles; The portion of the reinforcing member substrate that forms the first sealing part has a first glue injection hole that extends vertically through it; the portion of the reinforcing member substrate that forms the second sealing part has a second glue injection hole that extends vertically through it; and the portion of the reinforcing member substrate that forms the third sealing part has a third glue injection hole that extends vertically through it. A boss is provided at the corner edge where the reinforcing member base contacts the frame profile. Starting from the root of the multiple support railings and ending at the vertical side wall of the boss, a first inclined surface, a second inclined surface, and a third inclined surface are provided obliquely upward. The first inclined surface is located at the intersection of the second and third inclined surfaces. The first, second, and third inclined surfaces are all recessed relative to the reinforcing member base to form a fourth sealing part, a fifth sealing part, and a sixth sealing part, respectively. The fourth, fifth, and sixth sealing parts are interconnected. The first sealing part is connected to the fourth, fifth, and sixth sealing parts, the second sealing part is connected to the fifth sealing part, and the third sealing part is connected to the sixth sealing part.

3. A corner reinforcement member according to claim 2, characterized in that: The reinforcing component base includes a square connecting plate, and rectangular first and second side plates symmetrically connected on both sides of the connecting plate. The lengths of the first and second side plates are perpendicular to each other, and the width of the first side plate is equal to the minimum distance between the frame profile and the second profile.

4. A corner reinforcement member according to claim 3, characterized in that: The lower end face of the first side plate includes a U-shaped first support railing and a second support railing located between the first and second clearance grooves. The opening of the first support railing faces the connecting plate, and the width and length of the first support railing are parallel to the width and length of the first side plate, respectively. The second support railing is a cubic block. The first and second support railings are set along the circumferential edge of the first side plate, and the first support railing completely avoids the first profile.

5. A corner reinforcement member according to claim 4, characterized in that: The multiple support railings on the lower end face of the connecting plate include a third, fourth, fifth, and sixth support railings arranged symmetrically on the left and right. The third and fifth support railings are L-shaped, and the fourth and sixth support railings are cubic. The third support railing includes a first part parallel to the width of the first side plate and a second part parallel to the length of the first side plate. The fifth support railing includes a third part parallel to the width of the first side plate and a fourth part parallel to the length of the first side plate.

6. A corner reinforcement member according to claim 5, characterized in that: The width of the outer wall of the first support fence and the vertical distance between the outer walls of the second and fourth parts are both equal to the width of the second groove opening.

7. A corner reinforcement member according to claim 2, characterized in that: When the corner reinforcement is installed at the joint formed by splicing the end of the cantilever and the main body of the mullion of the window frame, the second or third glue injection hole is located directly above the glue strip groove of the cantilever of the window frame.

8. A corner reinforcement member according to claim 3, characterized in that: A latching protrusion is provided at the bottom of the surface where the first side plate contacts the second profile.

9. A corner reinforcement member according to claim 2, characterized in that: The first, second, and third injection holes are all conical in shape with a larger opening at the top and a smaller opening at the bottom.