High-strength corner connector for system door and window
By adopting a triangular inner cavity structure and an L-shaped corner bracket inner rod fixed connection design, combined with anti-slip protrusions and buffer groove rubber pads, the stability and connection accuracy problems of traditional corner brackets under high-intensity external forces are solved, achieving high-strength and stable door and window connections, and improving service life and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI SANJIA ALUMINUM CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional corner brackets lack stability and strength when facing high-intensity external forces or long-term use, making them prone to deformation and damage. Furthermore, their connection precision and anti-slip performance are insufficient, affecting the service life and safety of doors and windows.
The corner brackets, designed with a triangular inner cavity structure, are combined with the fixed connection between the inner rod and the support rod of the L-shaped corner bracket to enhance the stability of the connection. The design of the knife-edge groove, the knife-edge support rib, the corner blade, and the right-angle support rib improves the connection accuracy. At the same time, anti-slip protrusions and rubber buffer pads in the buffer groove are set to enhance the pressure resistance and anti-slip performance.
Significantly improves the strength and stability of corner brackets, enhances the durability and safety of doors and windows, reduces the risk of loosening and falling off, strengthens the stability and sealing of connections, and extends service life.
Smart Images

Figure CN224244729U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window structure technology, and in particular to a high-strength corner bracket for system doors and windows. Background Technology
[0002] In the field of door and window manufacturing and installation, corner brackets are key components that connect the four corners of doors and windows, and their performance directly affects the overall stability and durability of doors and windows.
[0003] However, traditional corner brackets mostly adopt a rectangular inner cavity design. Although they can meet basic connection requirements to a certain extent, their stability and strength are often insufficient when facing high-intensity external forces or during long-term use. They are prone to deformation, damage, or even detachment, which seriously affects the service life and safety of doors and windows. In addition, traditional corner brackets also have limitations in connection accuracy and anti-slip performance, making it difficult to ensure the stability and sealing of door and window installations. To solve the above problems, this utility model provides a high-strength corner bracket for system doors and windows. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a high-strength corner bracket for system doors and windows.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A high-strength corner bracket for system doors and windows includes two outer corner bracket rods. Support rods are fixedly connected to the inner sides of both outer corner bracket rods. The other ends of the two support rods are fixedly connected to the same L-shaped inner corner bracket rod. A knife-edge groove is provided at the middle of the outer sides of both outer corner bracket rods. Knife-edge support ribs are fixedly connected to both ends of the L-shaped inner corner bracket rod. Corner blades are fixedly connected to opposite ends of the two outer corner bracket rods. A right-angle support rib is fixedly connected between the two corner blades. A male-female connector is fixedly connected to the outer side of the right-angle support rib.
[0007] As a further improvement of this utility model, the other end of the blade support rib is fixedly connected to the blade groove.
[0008] As a further improvement of this utility model, a middle support rib is fixedly connected to the middle end of the outer side of the L-shaped corner bracket inner rod, and the other end of the middle support rib is fixedly connected to the corner bracket blade.
[0009] As a further improvement of this utility model, several anti-slip protrusions are fixedly connected to both ends of the inner side of the L-shaped corner bracket inner rod.
[0010] As a further improvement of this utility model, a buffer groove is provided inside the inner rod of the L-shaped corner bracket.
[0011] As a further improvement of this utility model, the buffer groove is provided with a buffer pad, and the buffer pad is made of rubber.
[0012] The beneficial effects of this utility model are:
[0013] By setting up corner brackets and outer rods, the device adopts a triangular inner cavity structure design during use. Compared with the traditional rectangular inner cavity of ordinary corner brackets, its strength and stability are significantly improved, reaching several times that of ordinary corner brackets. This design makes the doors and windows more stable when subjected to external forces, and less prone to deformation or damage, thereby improving the overall durability and compressive strength of the doors and windows and extending their service life.
[0014] By setting the inner rod of the L-shaped corner bracket, the outer rod of the corner bracket and the inner rod of the L-shaped corner bracket are fixedly connected by the support rod during use, forming a stable triangular support structure. At the same time, the design of the knife-edge groove, the knife-edge position support rib, the corner blade and the right-angle position support rib not only enhances the connection accuracy between the corner bracket and the door and window profile, but also provides additional support force, making the doors and windows more secure and reliable during installation and use, and reducing the risk of loosening and falling off.
[0015] By setting anti-slip protrusions, the friction between the corner bracket and the door and window profiles is effectively increased, preventing slippage and improving the stability of the connection. In addition, the rubber buffer pad design in the buffer groove can absorb some energy when the corner bracket is impacted or vibrated, playing a buffering role and protecting the corner bracket and the connected door and window profiles from damage, thus improving the safety of the doors and windows. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of a high-strength angle bracket for system doors and windows proposed in this utility model.
[0017] Figure 2 This is a schematic diagram of the back structure of a high-strength corner bracket for system doors and windows proposed in this utility model.
[0018] Figure 3 This is a schematic diagram of the top structure of a high-strength corner bracket for system doors and windows proposed in this utility model.
[0019] In the diagram: 1. Outer rod of corner bracket; 2. Support rod; 3. Inner rod of L-shaped corner bracket; 4. Knife groove; 5. Support rib at knife edge position; 6. Set of corner blades; 7. Support rib at right angle position; 8. Male and female connector; 9. Middle support rib; 10. Anti-slip protrusions; 11. Buffer groove; 12. Buffer pad. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Reference Figures 1-3 A high-strength corner bracket for system doors and windows includes two outer corner bracket rods 1. Support rods 2 are fixedly connected to the inner sides of the two outer corner bracket rods 1. The other ends of the two support rods 2 are fixedly connected to the same L-shaped inner corner bracket rod 3. The middle of the outer side of the two outer corner bracket rods 1 is provided with a knife-edge groove 4. Both ends of the L-shaped inner corner bracket rod 3 are fixedly connected with knife-edge position support ribs 5. Angle blades 6 are fixedly connected to the opposite ends of the two outer corner bracket rods 1. Right-angle support ribs 7 are fixedly connected between the two angle blades 6. A male-female connector 8 is fixedly connected to the outer side of the right-angle support rib 7.
[0022] In this utility model, the other end of the knife-edge support rib 5 is fixedly connected to the knife-edge groove 4. The middle end of the outer side of the inner rod 3 of the L-shaped corner bracket is fixedly connected to the middle end of the middle end support rib 9. The other end of the middle end support rib 9 is fixedly connected to the corner blade 6. Through the reinforcement effect of the middle end support rib 9, the overall structural strength of the corner bracket is enhanced, and the pressure resistance and stability of the door and window are improved. Several anti-slip protrusions 10 are fixedly connected to both ends of the inner side of the inner rod 3 of the L-shaped corner bracket. These anti-slip protrusions 10 can increase the friction between the corner bracket and the door and window profiles, prevent sliding, and ensure the stability and sealing of the door and window installation.
[0023] The inner rod 3 of the L-shaped corner bracket has a buffer groove 11 inside. The design of the buffer groove 11 provides a certain deformation space for the corner bracket. When the corner bracket is subjected to external impact, it can play a certain buffering role. The buffer groove 11 has a buffer pad 12 inside. The buffer pad 12 is made of rubber. The rubber buffer pad 12 has good elasticity and shock absorption performance. It can effectively absorb and disperse energy when the corner bracket is impacted, protecting the corner bracket and the connected door and window profiles from damage.
[0024] This utility model mainly consists of two outer corner brackets 1. Support rods 2 are fixedly connected to the inner sides of both outer corner brackets 1. The other ends of the support rods 2 are jointly fixedly connected to the same L-shaped inner corner bracket 3, forming a stable triangular support structure. At the middle of the outer sides of both outer corner brackets 1, knife-edge grooves 4 are provided for precise alignment with door and window profiles. Simultaneously, knife-edge support ribs 5 are fixedly connected to both ends of the L-shaped inner corner bracket 3. The other ends of these knife-edge support ribs 5 are respectively fixedly connected to the corresponding knife-edge grooves 4 to enhance the stability and support force at the connection point. Corner blades 6 are fixedly connected to the opposite ends of both outer corner brackets 1. The two corner brackets are fixedly connected by right-angle support ribs 7. The right-angle support ribs 7 not only enhance the connection strength between the two outer rods 1, but also provide a connection interface with other components or door and window frames through the male and female connectors 8 fixedly connected to their outer sides. A middle support rib 9 is fixedly connected to the middle of the outer side of the inner rod 3 of the L-shaped corner bracket. The other end of the middle support rib 9 is fixedly connected to the corner blade 6, which further enhances the structural stability and load-bearing capacity of the entire corner bracket system. Finally, several anti-slip protrusions 10 are fixedly connected to both ends of the inner side of the inner rod 3 of the L-shaped corner bracket. These anti-slip protrusions 10 can effectively prevent slippage when in contact with door and window profiles, and improve the stability of the connection.
[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A high-strength corner bracket for system doors and windows, comprising two outer corner bracket rods (1), characterized in that, The inner sides of the two outer corner brackets (1) are fixedly connected to support rods (2), and the other ends of the two support rods (2) are fixedly connected to the same L-shaped inner corner bracket (3). The middle of the outer side of the two outer corner brackets (1) is provided with a knife-edge groove (4). The two ends of the L-shaped inner corner bracket (3) are fixedly connected to knife-edge support ribs (5). The opposite ends of the two outer corner brackets (1) are fixedly connected to corner blades (6). The two corner blades (6) are fixedly connected to a right-angle support rib (7). The outer side of the right-angle support rib (7) is fixedly connected to a male-female connector (8).
2. The high-strength angle bracket for system doors and windows according to claim 1, characterized in that, The other end of the blade support rib (5) is fixedly connected to the blade groove (4).
3. The high-strength corner bracket for system doors and windows according to claim 1, characterized in that, The middle end of the inner rod (3) of the L-shaped corner bracket is fixedly connected to a middle support rib (9), and the other end of the middle support rib (9) is fixedly connected to the corner blade (6).
4. The high-strength angle bracket for system doors and windows according to claim 1, characterized in that, Both ends of the inner side of the L-shaped corner bracket inner rod (3) are fixedly connected with several anti-slip protrusions (10).
5. A high-strength angle bracket for system doors and windows according to claim 1, characterized in that, The L-shaped corner bracket inner rod (3) has a buffer groove (11) inside.
6. A high-strength angle bracket for system doors and windows according to claim 5, characterized in that, The buffer groove (11) is provided with a buffer pad (12) inside, and the buffer pad (12) is made of rubber.