Corner connecting piece and profile frame assembly

Abstract

The utility model discloses a corner connecting piece and a section bar frame assembly, the corner connecting piece comprises a first connecting strip, a second connecting strip and a third connecting strip which are located on different extension planes, the first connecting strip is vertically connected with the second connecting strip, the third connecting strip is horizontally and vertically connected between the first connecting strip and the second connecting strip, and the first connecting strip is connected with the second connecting strip. The first connecting strip is provided with a first inserting part inserted into the first section bar, the second connecting strip is provided with a second inserting part inserted into the second section bar, the third connecting strip is provided with a third inserting part inserted into the third section bar, and a decorating part is arranged at the intersection of the first connecting strip and the second connecting strip. The decorating part is provided with a cambered surface area and a right-angle area, and the right-angle area is located on the rear side of the cambered surface area. The aquarium cabinet has the advantages that the cut risk is effectively avoided, and the overall aesthetics and practicability of the aquarium cabinet are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window accessories, in particular to a corner connector and a profile frame assembly. Background Art

[0002] In the current design and production of aquarium cabinets, the connection technology of the frame structure has always been an important link that cannot be ignored. Traditionally, most frame construction tends to adopt direct right-angle splicing technology, that is, the four-sided profiles are assembled into a frame using metal angle irons, wooden mortise and tenon joints or simple bolt connections. Although this approach has certain advantages in cost control and ease of processing, as consumers' requirements for home safety and aesthetics continue to increase, its shortcomings are becoming increasingly prominent.

[0003] The main disadvantages of the existing technology include: 1. Safety hazards: the sharp edges formed by right-angle splicing, and the edges have not been specially processed, which poses a significant safety hazard. 1. Lack of aesthetics: Although the right-angle design is simple, it looks a bit stiff in the modern home decoration style and lacks a soft transition effect, which makes it difficult to meet consumers' pursuit of the aesthetics of furniture design, especially in the living room or study room with an aquarium as the center. The sharp-edged cabinet forms a sharp contrast with the flowing waterscape in the aquarium, destroying the overall harmonious beauty. 2. Structural stability issues: Traditional connection methods may become loose due to uneven force or long-term use, especially in humid environments, such as near aquarium cabinets, where wood is prone to expansion and deformation and metal parts are prone to rust, further affecting the stability and service life of the cabinet. 3. Inconvenient maintenance and cleaning: The gaps in right-angle splicing are often hiding places for dust and dirt, which are difficult to clean. Long-term accumulation not only affects the appearance, but also may become a breeding ground for bacteria, which is a major challenge for the surrounding environment of the aquarium that needs to be kept clean. Utility Model Content

[0004] The utility model aims to provide a safe, beautiful and stable corner connector and profile frame assembly, which can effectively avoid the risk of cuts through rounded design and improve the overall aesthetics and practicality of the aquarium cabinet.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a corner connector, comprising a first connecting strip, a second connecting strip and a third connecting strip in different extension planes, the first connecting strip is vertically connected to the second connecting strip, the third connecting strip is horizontally and vertically connected between the first connecting strip and the second connecting strip, the first connecting strip has a first insertion portion inserted into the first profile, the second connecting strip has a second insertion portion inserted into the second profile, the third connecting strip has a third insertion portion inserted into the third profile, a decorative piece is arranged at the intersection of the first connecting strip and the second connecting strip, the decorative piece has a curved surface area and a right-angle area, the right-angle area is located on the rear side of the curved surface area, and the right-angle area has a first plane and a second plane perpendicular to each other, the first plane is flush with the side surface of the first profile, and the second plane is flush with the upper surface of the second profile.

[0006] Preferably, a step portion extends rearwardly from the rear side of the first insertion portion, and the third connecting strip is arranged between the rear side of the step portion and the rear side of the first insertion portion.

[0007] Preferably, a groove for inserting a plate is provided at the bottom of the right-angle area, and the groove is opened downward and backward.

[0008] Preferably, a protrusion is provided at one end of the third insertion strip close to the second connection strip, and a plurality of mounting holes are provided on the protrusion for matching with fastening screws to connect with the third profile.

[0009] The utility model also discloses a profile frame assembly, comprising a first profile distributed up and down, a second profile distributed left and right, a third profile distributed front and back, and a corner connector, wherein the first profile, the second profile, and the third profile are connected through the corner connector, and the corner connector comprises a first connecting strip, a second connecting strip, and a third connecting strip in different extension planes, the first connecting strip is vertically connected to the second connecting strip, and the third connecting strip is horizontally and vertically connected between the first connecting strip and the second connecting strip, the first connecting strip is plugged into the first profile through a first insertion portion, the second connecting strip is plugged into the second profile through a second insertion portion, and the third connecting strip is plugged into the third profile through a third insertion portion, and a decorative piece is arranged at the intersection of the first connecting strip and the second connecting strip, the decorative piece has a curved surface area and a right-angle area, the right-angle area is located at the rear side of the curved surface area, and the right-angle area has a first plane and a second plane perpendicular to each other, the first plane is flush with the side surface of the first profile, and the second plane is flush with the upper surface of the second profile.

[0010] Preferably, the first profile has a first accommodating groove for inserting the first insertion part, and a slot is also provided on the rear side of the first profile. A groove for inserting a plate is provided at the bottom of the right-angle area, and the groove is opened downward and backward. The groove and the slot are connected to form a positioning gap for inserting the plate.

[0011] Preferably, the second profile has a second receiving groove for inserting the second insertion part, the third profile has a third receiving groove for inserting the third insertion part, and the third profile is connected to the third insertion part by a fastening screw.

[0012] Preferably, a protrusion is provided at one end of the third insertion strip close to the second connecting strip, the protrusion extends into the third profile, and a plurality of mounting holes are provided on the protrusion, a positioning hole corresponding to the position of the mounting hole is opened on the third profile, and the fastening screw is located between the mounting hole and the positioning hole.

[0013] Preferably, the first profile has a first front plate and a first wing plate, the first front plate and the first wing plate are connected by a first arc area, the first arc area and the arc surface area have a smooth transition, the outer surface of the first wing plate is flush with the first plane, and the first front plate is provided with a first inclined surface.

[0014] Preferably, the second profile has a second front plate and a second wing plate, the second front plate and the second wing plate are connected by a second arc area, the second arc area and the arc surface area have a smooth transition, the upper surface of the second wing plate is flush with the second plane, and a second inclined surface is provided on the second front plate, and the first inclined surface is butt-matched with the second inclined surface.

[0015] Compared with the prior art, the utility model has the following advantages: the corner connector proposed in the utility model overcomes many shortcomings of the traditional right-angle splicing technology, especially considering home safety, aesthetics and structural stability. The connector includes a first connecting bar, a second connecting bar and a third connecting bar, wherein the first connecting bar is vertically connected to the second connecting bar, and the third connecting bar is responsible for connecting the two horizontally and vertically to form a stable frame structure. The three connecting bars all include an insertion portion, which can be tightly plugged into the corresponding profile, ensuring a firm connection and a simple and clean overall frame structure.

[0016] At the intersection of the three connecting strips, a decorative piece is specially arranged. The decorative piece has a curved area and a right-angle area. The curved area is designed to face outward, providing a softer visual and actual contact effect to avoid sharp edges and reduce the risk of injury in the event of an accidental collision. The right-angle area is located at the rear of the curved surface, and its first and second planes are strictly flush with the profiles they are connected to, ensuring a neat and consistent appearance to better meet the aesthetic requirements of modern homes.

[0017] This design improves the overall stability of the aquarium cabinet frame. It avoids the expansion and deformation of wood and the rust of metal parts through the plug-in structure, extending the service life. At the same time, the curved decorative parts not only improve the appearance, but also facilitate daily maintenance and cleaning, avoid the accumulation of dust and dirt, keep the surrounding environment of the aquarium clean, and reduce hygiene risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. It is obvious that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model. Figure 2 ;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model in the exploded state;

[0024] In the figure, 1, corner connector; 2, first connecting strip; 3, second connecting strip; 4, third connecting strip; 5, first insertion part; 6, second insertion part; 7, third insertion part; 8, decorative part; 9, arc surface area; 10, right angle area; 11, first plane; 12, second plane; 13, first profile; 14, second profile; 15, third profile; 16, step part; 17, groove; 18, protrusion; 19, mounting hole; 20, profile frame assembly; 21, first accommodating groove; 22, slot; 23, positioning gap; 24, second accommodating groove; 25, positioning hole; 26, first front plate; 27, first wing plate; 28, first arc area; 29, first inclined surface; 30, second front plate; 31, second wing plate; 32, second arc area; 33, second inclined surface; 34, third accommodating groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1: As shown in the figure, a corner connector 1 includes a first connecting strip 2, a second connecting strip 3 and a third connecting strip 4 in different extension planes, the first connecting strip 2 is vertically connected to the second connecting strip 3, the third connecting strip 4 is horizontally and vertically connected between the first connecting strip 2 and the second connecting strip 3, the first connecting strip 2 has a first insertion portion 5 inserted into the first profile 13, the second connecting strip 3 has a second insertion portion 6 inserted into the second profile 14, the third connecting strip 4 has a third insertion portion 7 inserted into the third profile 15, a decorative piece 8 is provided at the intersection of the first connecting strip 2 and the second connecting strip 3, the decorative piece 8 has a curved area 9 and a right angle area 10, the right angle area 10 is located on the rear side of the curved area 9, and the right angle area 10 has a first plane 11 and a second plane 12 perpendicular to each other, the first plane 11 is flush with the side of the first profile 13, and the second plane 12 is flush with the upper surface of the second profile 14.

[0027] In this embodiment, a step portion 16 is extended backward from the rear side of the first insertion portion 5 , and the third connecting strip 4 is disposed between the rear side of the step portion 16 and the rear side of the first insertion portion 5 .

[0028] The core advantage of this design is that by introducing the structure of the step portion 16, a more precise and stable connection between the first insertion portion 5 and the third connecting strip 4 is achieved. The setting of the step portion 16 forms an additional support point between the third connecting strip 4 and the first insertion portion 5. This support not only increases the compressive and bending strength of the connection part, but also improves the stability of the entire connection when it is subjected to longitudinal tension or pressure.

[0029] In terms of working principle, when the profile frame assembly 20 needs to be assembled together, the first insertion portion 5 is tightly combined with the third connecting bar 4 through the step portion 16 extending from its rear side. The existence of the step portion 16 provides a fixed point for the third connecting bar 4, thereby ensuring that the third connecting bar 4 is stable in position and not easily displaced when subjected to external force. This close contact surface increases friction and further ensures the stability and durability of the entire connection.

[0030] In addition, due to the precise fit between the step portion 16 and the third connecting strip 4, the entire connection structure is more precise, and the appearance after assembly is neater and more beautiful, with no protruding parts, reducing safety hazards. At the same time, this design makes the corner connector 1 more convenient and quick to install, and can achieve fast and accurate positioning, thereby improving assembly efficiency.

[0031] In this embodiment, a groove 17 for inserting a plate is provided at the bottom of the right-angle area 10, and the groove 17 is opened downward and backward.

[0032] The main advantage of this design is that it provides a simple and stable solution for the insertion of the plate. By designing a groove 17 at the bottom of the right-angle area 10, and the groove 17 is open downward and backward, such a structure greatly facilitates the installation of the plate. The downward opening allows the plate to be directly inserted vertically into the groove 17 from above, while the backward opening allows the plate to slide in from the rear of the connector. Such a two-way opening design provides more flexibility and options for the positioning and installation of the plate.

[0033] When the plate needs to be fixed in the right-angle area 10 of the profile frame, the plate can be inserted into the groove 17 from the top or the back according to the actual situation. Once the plate is inserted, its edge will be tightly surrounded by the groove 17, thereby physically locking the position of the plate to prevent it from moving in the vertical or horizontal direction, ensuring the overall stability of the component. At the same time, since the groove 17 provides an embedding space of a certain depth, it also provides a more stable support foundation for the contact between the plate and the connecting piece, which not only increases the firmness of the structure, but also increases the overall structure's resistance to external forces to a certain extent.

[0034] In this embodiment, a protrusion 18 is provided at one end of the third insertion portion 7 close to the second connecting strip 3 , and a plurality of mounting holes 19 are provided on the protrusion 18 for coupling with fastening screws to connect with the third profile 15 .

[0035] The advantage of this structure is that, through the multiple mounting holes 19 on the protrusion 18, more fixing points are provided for the connection between the third insertion part 7 and the third profile 15, which not only increases the reliability of the connection, but also enhances the ability of the entire connection system to withstand forces in various directions, thereby improving the overall stability of the frame. The design of multiple mounting holes 19 also allows the installation of fastening screws at different positions, which provides flexibility for installation and facilitates corresponding adjustments based on the pre-set or actual hole positions on the third profile 15 to ensure that the screws can be installed correctly and securely.

[0036] When installing the corner connector 1, the staff can choose to use one or more mounting holes 19 to fix the third insertion part 7 to the third profile 15 according to the situation. The fastening screw is screwed into the third profile 15 through the mounting hole 19 of the protrusion 18, which not only fixes the position of the protrusion 18 in the vertical and horizontal directions, but also strengthens the entire joint area between the connector and the profile through the diffused fastening points, reducing the possibility of deformation or damage caused by stress concentration.

[0037] This design makes the assembly or maintenance of home frame structures such as aquarium cabinets more efficient, and it can remain stable even under high forces or after long-term use. At the same time, this method is also suitable for areas with humid environments or frequent stress changes, because even in humid conditions or under strange loads, multi-point fastening can ensure the safety and stability of the connection and extend the service life of the product.

[0038] Embodiment 2: As shown in the figure, a profile frame assembly 20 includes a first profile 13 distributed vertically, a second profile 14 distributed horizontally, a third profile 15 distributed frontward and rearward, and a corner connector 1. The first profile 13, the second profile, and the third profile 15 are connected by the corner connector 1. The corner connector 1 includes a first connecting strip 2, a second connecting strip 3, and a third connecting strip 4 in different extension planes. The first connecting strip 2 is vertically connected to the second connecting strip 3, and the third connecting strip 4 is horizontally and vertically connected between the first connecting strip 2 and the second connecting strip 3. The first connecting strip 2 is inserted through the first The first connecting strip 2 and the second connecting strip 3 are inserted into the first profile 13 through the second insertion portion 5, the second connecting strip 3 is inserted into the second profile 14 through the second insertion portion 6, and the third connecting strip 4 is inserted into the third profile 15 through the third insertion portion 7. A decorative piece 8 is provided at the intersection of the first connecting strip 2 and the second connecting strip 3. The decorative piece 8 has a curved area 9 and a right-angle area 10. The right-angle area 10 is located on the rear side of the curved area 9, and the right-angle area 10 has a first plane 11 and a second plane 12 which are perpendicular to each other. The first plane 11 is flush with the side surface of the first profile 13, and the second plane 12 is flush with the upper surface of the second profile 14.

[0039] The present profile frame assembly 20 utilizes a cleverly designed corner connector 1 to achieve an efficient and stable connection of the first profile 13 (distributed up and down), the second profile 14 (distributed left and right) and the third profile 15 (distributed front and back). The corner connector 1 is composed of a first connecting strip 2, a second connecting strip 3 and a third connecting strip 4. These connecting strips are in different extension planes in space, which increases the three-dimensional stability of the structure. The vertical connection between the first connecting strip 2 and the second connecting strip 3, and the horizontal vertical connection between the third connecting strip 4 and the two connecting strips, together constitute a stable bracket system, ensuring the mechanical properties and structural integrity of the profile frame assembly 20 in any direction.

[0040] The corner connector 1 is precisely plugged into the corresponding profile through the first, second and third insertion parts 7. This plug-in method not only ensures the firmness of the connection, but also simplifies the assembly process, making the installation faster and more intuitive. During the component connection process, the decorative piece 8 at the intersection of the first connecting strip 2 and the second connecting strip 3 plays a critical role. Its design combines beauty and practicality: the arc area 9 and the right-angle area 10 of the decorative piece 8 are combined, which not only eliminates sharp edges and reduces the risk of collision injury, but also enhances the harmony and beauty of the overall appearance. In addition, the right-angle area 10 of the decorative piece 8 is flush with the side and upper surface of the profile, which not only ensures the neatness of the overall appearance, but also avoids possible mismatch and instability after installation.

[0041] In this embodiment, the first profile 13 has a first accommodating groove 21 for inserting the first insertion part 5, and a slot 22 is also provided on the rear side of the first profile 13. A groove 17 for inserting a plate is provided at the bottom of the right-angle area 10. The groove 17 is opened downward and backward, and the groove 17 and the slot 22 are connected to form a positioning gap 23 for inserting the plate.

[0042] Specifically, the first profile 13 is provided with a first accommodating groove 21 for accommodating the first insertion portion 5, which enables the first connecting strip 2 to be easily inserted and tightly combined with the profile, thereby ensuring the reliability of the connection. In addition, a slot 22 is designed on the rear side of the first profile 13, which is connected to the groove 17 at the bottom of the right-angle area 10. Such a groove 17 is not only open downward, but also open backward, thereby forming a gap for positioning the plate. The advantage of this structure is that through the connection design of the groove 17 and the slot 22, the plate can be quickly inserted into the profile frame. This two-way opening configuration greatly increases the flexibility during assembly, and the installation of the plate becomes more convenient. By simply sliding into the positioning gap 23, the plate can quickly reach the predetermined position and maintain stability in the horizontal or vertical direction. This not only reduces the labor intensity during installation, but also improves the installation accuracy, ensures the close fit between the edge of the plate and the profile connector, and enhances the integrity and structural stability of the entire frame.

[0043] In this embodiment, the second profile 14 has a second receiving groove 24 for the second insertion portion 6 to be inserted into, the third profile 15 has a third receiving groove 34 for the third insertion portion 7 to be inserted into, and the third profile 15 and the third insertion portion 7 are connected by fastening screws.

[0044] In the profile frame assembly 20, the design of the second profile 14 and the third profile 15 provides a special second receiving groove 24 and a third receiving groove, which are used to accurately accommodate the second insertion part 6 and the third insertion part 7, respectively, so as to achieve a secure connection between the corner connector 1 and the profile unit. The method of connecting the third profile 15 and the third insertion part 7 by fastening screws further enhances the stability of the connection part and the overall structural strength of the frame assembly. The advantages of this design include providing a highly accurate and stable connection system. When the second profile 14 and the third profile 15 are combined with the corresponding insertion part, the receiving groove ensures that the insertion part fits tightly inside the profile, thereby achieving the geometric accuracy of the frame. In addition, the fastening screws connected to the third insertion part 7 not only fix the position of the insertion part, but also make the entire frame unit have better bearing capacity and the ability to resist stress that may occur in daily use.

[0045] In this embodiment, a protrusion 18 is provided at one end of the third insertion portion 7 close to the second connecting strip 3, and the protrusion 18 extends into the third profile 15, and a plurality of mounting holes 19 are provided on the protrusion 18. A positioning hole 25 corresponding to the position of the mounting hole 19 is opened on the third profile 15, and a fastening screw is located between the mounting hole 19 and the positioning hole 25.

[0046] In the profile frame assembly 20, the protrusion 18 of the third insertion portion 7 is designed to penetrate into the third profile 15, which not only enhances the positioning accuracy of the connection, but also provides an exact track and fixing point for the installation of the fastening screws through the multiple mounting holes 19 provided on the protrusion 18 and the corresponding positioning holes 25 on the third profile 15. Such a design has the following significant advantages:

[0047] For the improvement of structural stability, the configuration in which the protrusion 18 extends into the interior of the third profile 15 means that the insertion portion is not only in contact with the third profile 15 on the surface, but also forms an inserted anchor point in the internal structure of the profile. Compared with surface contact only, this deep connection method can more effectively resist the potential loosening caused by impact and vibration, fundamentally improving the stability and bearing capacity of the frame. In addition, using fastening screws to pass through the positioning holes 25 and lock into the mounting holes 19 can achieve more reliable mechanical interlocking, so that the connection points are reinforced and the stress is evenly distributed. This setting method of fastening screws also facilitates disassembly and assembly, providing a convenient maintenance method.

[0048] In this embodiment, the first profile 13 has a first front panel 26 and a first wing panel 27. The first front panel 26 and the first wing panel 27 are connected by a first arc region 28. There is a smooth transition between the first arc region 28 and the arc surface region 9. The outer surface of the first wing panel 27 is flush with the first plane 11, and a first inclined surface 29 is provided on the first front panel 26.

[0049] In the design of this profile frame assembly 20, the first profile 13 is composed of a first front panel 26 and a first wing panel 27 with an innovative structure, which are connected by a first arc area 28. This design not only provides an elegant appearance visually, but also achieves many functional improvements. The setting of the first arc area 28 ensures a smooth transition between the first front panel 26 and the first wing panel 27. This smooth curved connection not only reduces sharp edges and reduces the risk of injury due to accidental collisions, but also increases the structural integrity and mechanical properties of the entire profile.

[0050] In addition, a perfect and smooth transition can be achieved between the first arc area 28 and the arc area 9 of the decorative part 8, which not only means that the consistency and aesthetics of the appearance of the entire connection are significantly improved, but also shows the designer's careful consideration of details, ensuring that every part of the entire profile frame assembly 20 can work together to construct a frame structure that is both stable and beautiful. The flush design of the outer surface of the first wing panel 27 and the first plane 11 further emphasizes the neatness of the profile and the smoothness of the lines, ensuring seamless connection with other components, while also providing a simple appearance effect.

[0051] In this embodiment, the second profile 14 has a second front panel 30 and a second wing panel 31. The second front panel 30 and the second wing panel 31 are connected by a second arc area 32. There is a smooth transition between the second arc area 32 and the arc surface area 9. The upper surface of the second wing panel 31 is flush with the second plane 12, and a second inclined surface 33 is provided on the second front panel 30. The first inclined surface 29 is docked with the second inclined surface 33.

[0052] The design of the second profile 14 in the profile frame assembly 20 echoes the first profile 13. By including the second front plate 30 and the second wing plate 31, and using the second arc area 32 to achieve the connection between the two, the consistency and unity of the profile design are demonstrated. The second arc area 32 not only achieves a smooth transition with the arc area 9, enhancing the overall aesthetics, but also ensures the neatness and consistency of the surface through the upper surface of the second wing plate 31 flush with the second plane 12. The second bevel 33 is designed to achieve a fusion of functionality and visual effects when docked with the first bevel 29 of the first profile 13. The docking and cooperation between the first bevel 29 and the second bevel 33 is not only a clever use of structural design, but also a key point to achieve a higher strength connection of the profile. The cooperation between the bevels means that the force between the profiles can be effectively dispersed, increasing the stability of the connection, and also making the structure stronger when subjected to external forces. This design optimizes the mechanical properties of the profile frame and improves the overall durability and deformation resistance.

[0053] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A corner connector, characterized in that: It includes a first connecting strip, a second connecting strip and a third connecting strip in different extension planes, the first connecting strip is vertically connected to the second connecting strip, the third connecting strip is horizontally and vertically connected between the first connecting strip and the second connecting strip, the first connecting strip has a first insertion portion inserted into the first profile, the second connecting strip has a second insertion portion inserted into the second profile, and the third connecting strip has a third insertion portion inserted into the third profile. A decorative piece is provided at the intersection of the first connecting strip and the second connecting strip, the decorative piece has a curved surface area and a right-angle area, the right-angle area is located on the rear side of the curved surface area, and the right-angle area has a first plane and a second plane perpendicular to each other, the first plane is flush with the side surface of the first profile, and the second plane is flush with the upper surface of the second profile.

2. A corner connector according to claim 1, characterized in that: A step portion is extended rearwardly from the rear side of the first insertion portion, and the third connecting strip is arranged between the rear side of the step portion and the rear side of the first insertion portion.

3. A corner connector according to claim 2, characterized in that: A groove for inserting a plate is provided at the bottom of the right-angle area, and the groove is opened downward and backward.

4. A corner connector according to claim 1, characterized in that: A protrusion is provided at one end of the third insertion strip close to the second connection strip, and a plurality of mounting holes are provided on the protrusion for matching with fastening screws to connect with the third profile.

5. A profile frame assembly, comprising a first profile distributed vertically, a second profile distributed horizontally, a third profile distributed frontwardly and rearwardly, and a corner connector, wherein the first profile, the second profile, and the third profile are connected by the corner connector, characterized in that: The corner connector includes a first connecting strip, a second connecting strip and a third connecting strip in different extension planes, the first connecting strip is vertically connected to the second connecting strip, the third connecting strip is horizontally and vertically connected between the first connecting strip and the second connecting strip, the first connecting strip is inserted into the first profile through a first insertion portion, the second connecting strip is inserted into the second profile through a second insertion portion, and the third connecting strip is inserted into the third profile through a third insertion portion, a decorative piece is provided at the intersection of the first connecting strip and the second connecting strip, the decorative piece has a curved surface area and a right-angle area, the right-angle area is located on the rear side of the curved surface area, and the right-angle area has a first plane and a second plane perpendicular to each other, the first plane is flush with the side surface of the first profile, and the second plane is flush with the upper surface of the second profile.

6. A profile frame assembly according to claim 5, characterized in that: The first profile has a first accommodating groove for inserting the first insertion part, and a slot is also provided on the rear side of the first profile. The bottom of the right-angle area is provided with a groove for inserting a plate. The groove is open downward and backward, and the groove and the slot are connected to form a positioning gap for inserting the plate.

7. A profile frame assembly according to claim 6, characterized in that: The second profile has a second receiving groove for the second insertion part to be inserted, the third profile has a third receiving groove for the third insertion part to be inserted, and the third profile is connected to the third insertion part by a fastening screw.

8. A profile frame assembly according to claim 7, characterized in that: A protrusion is provided at one end of the third insertion strip close to the second connecting strip, the protrusion extends into the third profile, and a plurality of mounting holes are provided on the protrusion, a positioning hole corresponding to the position of the mounting hole is opened on the third profile, and the fastening screw is located between the mounting hole and the positioning hole.

9. A profile frame assembly according to claim 5, characterized in that: The first profile comprises a first front plate and a first wing plate, the first front plate and the first wing plate are connected via a first arc region, the first arc region and the arc surface region have a smooth transition, the outer surface of the first wing plate is flush with the first plane, and a first inclined surface is provided on the first front plate.

10. A profile frame assembly according to claim 9, characterized in that: The second profile has a second front plate and a second wing plate, the second front plate and the second wing plate are connected by a second arc area, the second arc area and the arc surface area have a smooth transition, the upper surface of the second wing plate is flush with the second plane, and a second inclined surface is provided on the second front plate, and the first inclined surface is butt-matched with the second inclined surface.

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