Angle code with limiting function and connecting structure of the angle code and the frame profile

Abstract

The utility model discloses a corner code with limiting function and the connecting structure of corner code and frame section bar, is equipped with elastic support claw, card thorn and limiting block elastic support claw near the root of corner code on the inner side surface of corner code horizontal edge, vertical edge, and the distance from the head to the outer side surface of corner code is greater than the height of frame section bar cavity under the natural state, and the distance from the head of card thorn to the outer side surface of corner code is less than the height of cavity, and the limiting block is arranged below the elastic support claw, and the elastic support claw can still be connected with the frame section bar corner code insert part when the clearance and its contact, the utility model provides the deformation stop for the elastic support claw through the limiting block, solves the anchoring failure problem caused by the excessive deformation of the elastic element of the existing corner code, and effectively improves the reliability of frame assembly connection.

Description

Technical Field

[0001] This utility model relates to a corner bracket, specifically a corner bracket with a limiting function and its connection structure with the frame profile. Background Technology

[0002] Corner brackets are key components connecting two frame profiles to form a frame structure, and are widely used in doors, windows, curtain walls, and solar module frames. To improve connection reliability and assembly convenience, existing technologies often employ corner brackets with elastic snap-fit ​​structures. For example, the corner bracket with elastic deformation capability and its connection structure with the frame profile disclosed in patent 202311598955.7 has elastic support claws and spurs on its horizontal and vertical edges. The deformation of the elastic support claws compensates for cavity dimensional tolerances, eliminates corner gaps, and the spurs ensure pull-out resistance.

[0003] However, in practical applications, the following significant drawbacks have been found:

[0004] During transportation, handling, or installation, the elastic support claw is prone to excessive plastic deformation or fatigue damage due to accidental compression, resulting in a reduction in its effective extension height. When the corner bracket is inserted into the profile cavity, the excessively deformed elastic support claw cannot form an effective engagement with the corner bracket insertion part on the inner wall of the profile, thus causing anchoring failure and posing a risk of loosening at the corner joint. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a corner code with a limiting function and its connection structure with the frame profile.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] On the one hand, this utility model discloses a corner code with a limiting function, wherein at least one elastic support claw, at least one stab and at least one limiting block are provided on the inner side of the horizontal and vertical sides of the corner code.

[0008] The elastic support claw is located near the root of the corner bracket body. The elastic support claw has a natural state and a compressed state. In the natural state, the distance from the head of the elastic support claw to the outer surface of the corner bracket body is greater than the height of the frame profile cavity.

[0009] The limiting block is located below the elastic support claw, and there is a gap between the limiting block and the elastic support claw. When the elastic support claw is compressed and deformed to contact the limiting block, the head of the elastic support claw can still be engaged with the corner bracket insert inside the frame profile.

[0010] The distance from the head of the spur to the outer surface of the corner code body is less than the height of the cavity of the frame profile. The spur is used to snap into the corner code insert part inside the frame profile.

[0011] This utility model discloses a corner code with a limiting function, which has the following beneficial effects:

[0012] First, by setting limit blocks, a physical stop is provided for the deformation of the elastic support claw, effectively preventing excessive plastic deformation or fatigue damage due to accidental compression during transportation, handling, or installation. This ensures that even under maximum deformation, the head of the elastic support claw can still maintain the minimum effective engagement height with the corner bracket insert, fundamentally solving the anchoring loosening problem caused by the failure of elastic elements and improving the reliability of the frame assembly.

[0013] Secondly, the coordinated design of the elastic support claws and the clamps can automatically adapt to the dimensional tolerances of the frame profile cavity. The deformation of the elastic support claws eliminates the gap between the corner bracket and the cavity, preventing corner gaps; and due to their elasticity, the generated tension is gentle, avoiding the risk of cracking the profile.

[0014] Third, the elastic support claw is set at the root near the corner bracket body, using the area with the highest structural strength of the corner bracket as the support point. This makes the root of the elastic support claw less prone to damage when subjected to repeated compression and clamping forces, resulting in a longer service life.

[0015] Fourth, the elastic support claws and the piercings engage with the corner bracket insert, and the double engagement structure ensures the connection stability between the corner bracket and the frame profile, meets the pull-out resistance requirements, and prevents the connection from becoming loose.

[0016] Based on the above technical solution, the following improvements can be made:

[0017] As a preferred option, a gap of 0.2-1.2mm is left between the limiting block and the elastic support claw.

[0018] By adopting the above-mentioned preferred scheme, the gap is limited to a certain range, avoiding the failure of the limit due to excessive gap and the limitation of the elastic support claw's deformation capability due to insufficient gap, thereby further optimizing the limit effect and improving the anchoring reliability.

[0019] As a preferred embodiment, the head diameter of the elastic support claw is larger than the diameter of its root and other parts, and the elastic support claw is interference-fitted with the corner bracket insert on the frame profile.

[0020] By adopting the above-mentioned preferred scheme, the diameter of the elastic support claw head is increased, forming a stronger snap-fit ​​surface and a larger contact area with the corner bracket insert, thereby providing higher pull-out resistance and connection strength. At the same time, the head has high strength and good hardness, while the root and other parts have smaller diameters, maintaining good flexibility. This "thick head and thin body" structure achieves an ideal combination of strength and elasticity, optimizes stress distribution, and avoids fracture caused by stress concentration.

[0021] As a preferred embodiment, both the horizontal and vertical ends are provided with guide bevels. The guide bevels are used to guide the corner bracket body into the cavity of the frame profile. The angle of the guide bevels is 15° to 25°.

[0022] By adopting the above-mentioned preferred scheme, an inlet slope of 15°~25° is set so that the corner code can be smoothly inserted into the profile cavity, which effectively avoids hard collision and interference between the right-angle end and the profile cavity cross-section, fundamentally preventing the frame profile from cracking or scratching during assembly, and improving assembly efficiency and yield.

[0023] As a preferred embodiment, a 45° load-bearing chamfer is provided at the end areas of the horizontal and vertical sides. The chamfer is used to make face contact between the corner bracket and the 45° cut edge of another frame profile during stacking.

[0024] By adopting the preferred solution described above, a 45° load-bearing chamfer is provided, ensuring that the corner brackets form surface contact with the 45° cut edge of the frame during short-frame stacking and packaging for transport, rather than line or point contact. This significantly increases the load-bearing area, disperses stacking pressure, avoids indentations at the profile cut edges, makes stacking more stable, reduces relative displacement and damage during transportation, and also reduces or eliminates the need for isolation pads, thus lowering costs.

[0025] As a preferred embodiment, at least one support claw groove is provided on both the horizontal and vertical sides, and the root of the elastic support claw is connected to the edge of the groove opening. The support claw groove is used to provide deformation space for the elastic support claw.

[0026] By adopting the preferred scheme described above, the support claw groove provides sufficient deformation space for the elastic support claw, ensuring that it can undergo free and smooth elastic deformation without being obstructed by other parts of the bracket body. This not only guarantees the realization of the elastic function, but also avoids excessive internal stress in the material due to insufficient deformation space, thereby extending the fatigue life of the elastic support claw.

[0027] As a preferred embodiment, a buffer protrusion is provided at the front end of the junction of the horizontal and / or vertical sides. The buffer protrusion is used to buffer the impact between the corner bracket and the frame profile during the frame assembly process.

[0028] By adopting the above-mentioned preferred solution, the buffer protrusion effectively prevents damage to the sharp corner area of ​​the frame by absorbing the impact kinetic energy of the frame assembly, and ensures the consistency of the final positioning of the corner code.

[0029] As a preferred embodiment, a double-sided circular arc groove transition structure is provided at the junction of the horizontal and vertical sides.

[0030] By adopting the above-mentioned preferred solution, the corner is optimized from a sharp corner to a double-sided rounded transition, which effectively eliminates stress concentration and prevents the corner bracket from breaking at the corner when subjected to a large load.

[0031] On the other hand, this utility model also discloses a connection structure between a corner bracket and a frame profile, including: as any of the corner brackets mentioned above, the horizontal and vertical sides of the corner bracket extend into the cavity of the adjacent frame profile, and the elastic support claws and piercings of the corner bracket engage with the corner bracket insert portion on the frame profile.

[0032] This utility model discloses a connection structure between a corner bracket and a frame profile. This connection structure integrates all the advantages of the aforementioned corner brackets, ultimately forming an excellent frame corner connection solution that features seamless corner splicing, reliable connection, user-friendly assembly, and pull-out resistance that meets usage requirements. Its stability and durability are significantly superior to existing technologies.

[0033] As a preferred option, the corner bracket insert is a protrusion formed by glue injection or a boss on the inner wall of the profile.

[0034] By adopting the above-mentioned preferred solution, the corner code plug-in part is clearly defined as an injection protrusion or a protrusion on the inner wall of the profile, which is compatible with the common plug-in structure of existing composite material frames. No additional modification to the frame profile is required, which lowers the technical application threshold, improves the universality and compatibility of the connection structure, and facilitates large-scale promotion and application. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 The front view of the corner bracket provided in the embodiment of this utility model.

[0037] Figure 2 A side view of the corner bracket provided in an embodiment of this utility model.

[0038] Figure 3 One of the perspective views of the corner bracket provided in the embodiment of this utility model.

[0039] Figure 4 A front view of the corner bracket provided in an embodiment of this utility model (with angles and distances marked).

[0040] Figure 5 A schematic diagram showing the connection between the corner bracket and the frame profile provided in an embodiment of this utility model.

[0041] Figure 6 This is a schematic diagram showing the surface contact between the bearing chamfered surface of the corner bracket and the 45° cut edge of the frame profile, as provided in an embodiment of this utility model.

[0042] Figure 7 A perspective view showing the connection between the corner bracket and the frame profile provided in an embodiment of this utility model.

[0043] Figure 8 The second perspective view of the corner bracket provided in the embodiment of this utility model.

[0044] Wherein: 1-Corner code, 11-Horizontal edge, 12-Vertical edge, 13-Introduction bevel, 14-Bearing chamfered surface, 15-Support claw groove, 16-Double-sided arc groove transition structure, 2-Elastic support claw, 3-Crack, 4-Limiting block, 5-Frame profile, 51-Corner code insert part, 52-Cavity, 6-Buffer protrusion. Detailed Implementation

[0045] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] Furthermore, the expression "includes" is an "open-ended" expression, which means only that there is a corresponding component or step, and should not be interpreted as excluding additional components or steps.

[0048] To achieve the purpose of this utility model, in some embodiments of the corner code 1 with limiting function, such as Figure 1-3 As shown in Figures 5 and 7, the corner bracket with limiting function is made of PA66+PA6 material with 25-35% chopped glass fiber added through injection molding. The corner bracket 1 includes mutually perpendicular horizontal sides 11 and vertical sides 12. On the inner surface of the horizontal sides 11 and vertical sides 12 of the corner bracket 1, there is an elastic support claw 2, two spurs 3 and a limiting block 4.

[0049] The elastic support claw 2 is located near the root of the corner bracket 1 (i.e. near the L-shaped corner of the corner bracket 1). The elastic support claw 2 has a natural state and a compressed state. In the natural state, the distance h2 from the head of the elastic support claw 2 to the outer surface of the corner bracket 1 is greater than the height H of the cavity 52 of the frame profile 5.

[0050] The limiting block 4 is located below the elastic support claw 2. There is a gap between the limiting block 4 and the elastic support claw 2. When the elastic support claw 2 is compressed and deformed to contact the limiting block 4, the head of the elastic support claw 2 can still be engaged with the corner code plug-in part 51 inside the frame profile 5.

[0051] The distance h1 from the head of the locking barb 3 to the outer side surface of the corner brace 1 body is less than the height H of the cavity 52 of the frame profile 5, and the locking barb 3 is configured to be in snap fit with the corner brace insertion portion 51 inside the frame profile 5.

[0052] When the corner brace 1 is inserted into the profile or subjected to external extrusion, the elastic supporting claw 2 is deformed under pressure, and its deformation amount is limited within the range of the gap. Even if it deforms to contact the limit block 4, the distance from its head to the outer side surface of the corner brace 1 body can still be maintained within the effective distance, ensuring that it can still effectively achieve snap fit with the corner brace insertion portion 51 inside the frame profile 5 and prevent anchoring failure.

[0053] In the prior art, when assembling the corner brace 1 and the frame profile 5, due to the tolerances existing in the inner cavity of the profile and the outer dimension of the corner brace 1, when the dimension of the corner brace 1 is larger than the dimension of the cavity 52, the profile cavity may be cracked or deformed; when the dimension of the corner brace 1 is too small, a gap will exist between the corner brace 1 and the cavity 52, which will cause misaligned joints during assembly.

[0054] To solve the above problems, the present utility model discloses an elastic supporting claw 2. In the natural state, the distance h2 from the head of the elastic supporting claw 2 to the outer side surface of the corner brace 1 body is greater than the height H of the cavity 52 of the frame profile 5 (h2>H), so that the gap between the corner brace 1 and the cavity 52 can be eliminated by the elasticity of the elastic supporting claw 2, and at the same time, the tension generated by the deformation of the elastic supporting claw 2 is not large, which will not cause damage to the profile cavity. The top tooth structure at the head of the elastic supporting claw 2 can catch the corner brace insertion portion 51 to ensure the pull-out resistance requirement between the corner brace 1 and the profile. In addition, the distance h1 from the head of the two locking barbs 3 to the outer side surface of the corner brace 1 body is less than the height H of the cavity 52 of the frame profile 5 (h1<H), which will not generate tension on the frame cavity 52.

[0055] To prevent the elastic supporting claw 2 from being excessively extruded and deformed to result in h2<h1 (which causes the head of the elastic supporting claw 2 to be unable to catch the corner brace insertion portion 51), a limit block 4 is arranged at the lower part of the elastic supporting claw 2, so as to ensure that the elastic supporting claw 2 can still catch the corner brace insertion portion 51 even at the lowest deformation point.

[0056] The present utility model discloses a corner brace with a limiting function, which has the following beneficial effects:

[0057] First, by providing the limit block 4, a physical stop is provided for the deformation of the elastic supporting claw 2, which effectively prevents it from undergoing excessive plastic deformation or fatigue damage due to accidental extrusion during transportation, handling or installation. This ensures that even in the maximum deformation state, the head of the elastic supporting claw 2 can still maintain the minimum effective height for snap fitting with the corner brace insertion portion 51, fundamentally solving the problem of anchoring loosening caused by the failure of the elastic element, and improving the reliability of frame assembly.

[0058] Secondly, the coordinated design of the elastic support claw 2 and the clamping spur 3 can automatically adapt to the dimensional tolerances of the cavity 52 of the frame profile 5. The deformation of the elastic support claw 2 eliminates the gap between the corner bracket 1 and the cavity 52, preventing the phenomenon of corner gaps; and due to its elastic characteristics, the generated tension is gentle, avoiding the risk of cracking the profile.

[0059] Third, the elastic support claw 2 is set at the root near the body of the corner bracket 1, using the area with the highest structural strength of the corner bracket 1 as the support point, so that the root of the elastic support claw 2 is not easily damaged when subjected to repeated compression and clamping forces, and has a longer service life.

[0060] Fourth, the elastic support claw 2 and the spur 3 are engaged with the corner bracket insert part 51. The double engagement structure ensures the connection stability between the corner bracket 1 and the frame profile 5, meets the pull-out resistance requirements, and avoids loosening of the connection.

[0061] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that a gap d1 is left between the limiting block 4 and the elastic support claw 2, and d1=h2-h1;

[0062] Where: h2 is the distance from the head of the elastic support claw 2 to the outer surface of the corner bracket 1 in its natural state;

[0063] h1 is the distance from the head of the spike 3 to the outer surface of the body of the corner code 1.

[0064] By adopting the above-mentioned preferred scheme, the gap d1 between the limiting block 4 and the elastic support claw 2 is defined as h2-h1, which precisely controls the deformation range of the elastic support claw 2. On the one hand, it ensures that even under maximum deformation, the distance from the head of the elastic support claw 2 to the outer side of the corner bracket 1 is still equal to the distance h1 from the head of the spur 3 to the outer side of the corner bracket 1, thus ensuring effective engagement with the corner bracket insert part 51. On the other hand, it avoids excessive gap leading to limiting failure, and excessive gap limiting the deformation capability of the elastic support claw 2, further optimizing the limiting effect and improving anchoring reliability. In some embodiments, the gap d1 is between 0.2-1.2mm.

[0065] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the head diameter of the elastic support claw 2 is larger than the diameter of its root and other parts, and the elastic support claw 2 is interference-fitted with the corner code plug part 51 on the frame profile 5.

[0066] By adopting the above-mentioned preferred scheme, the diameter of the head of the elastic support claw 2 is increased, forming a stronger snap-fit ​​surface and a larger contact area with the corner bracket insert part 51, thereby providing higher pull-out resistance and connection strength. At the same time, the head has high strength and good hardness, while the root and other parts have smaller diameters, maintaining good flexibility. This "thick head and thin body" structure achieves an ideal combination of strength and elasticity, optimizes stress distribution, and avoids fracture caused by stress concentration.

[0067] During assembly, the ends of corner bracket 1, especially the right-angled ends made by sawing, are prone to interference and collision with the cavity cross-section of the frame profile 5, posing a risk of cracking the profile. To prevent the sawn right-angled surfaces of the aluminum alloy corner brackets from colliding with the profile cavity during frame assembly...

[0068] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the ends of the horizontal side 11 and the vertical side 12 are provided with guide slope 13. The guide slope 13 is used to guide the corner bracket 1 body to be inserted into the cavity 52 of the frame profile 5. The angle of the guide slope 13 is 15° to 25°.

[0069] Using the preferred scheme described above, an inlet slope 13 of 15°~25° is set (specifically as follows) Figure 4 The 15° and 24° angles shown enable the corner bracket 1 to be smoothly inserted into the profile cavity, effectively avoiding hard collisions and interference between the right-angle end and the profile cavity cross-section. This fundamentally prevents the frame profile from cracking or scratching during assembly, improving assembly efficiency and yield.

[0070] To further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that a 45° bearing chamfer surface 14 is provided at the end area of ​​the horizontal side 11 and the vertical side 12. The chamfer surface is used for the corner bracket to make face contact with the 45° cut edge of another frame profile during stacking.

[0071] Using the preferred embodiment described above, a 45° load-bearing chamfered surface 14 is provided, so that when the corner bracket 1 is stacked and packaged for transportation, it forms surface contact with the 45° cut edge of the frame rather than line or point contact. Figure 6 As shown. This significantly increases the load-bearing area, disperses the stacking pressure, avoids indentations at the cut edges of the profiles, makes the stacking more stable, reduces relative displacement and damage during transportation, and can reduce or eliminate the use of isolation pads, lowering costs and facilitating direct gripping by robotic arms during later assembly.

[0072] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that at least one support claw groove 15 is provided on both the horizontal side 11 and the vertical side 12. The root of the elastic support claw 2 is connected to the edge of the groove of the support claw groove 15. The support claw groove 15 is used to provide deformation space for the elastic support claw 2.

[0073] By adopting the above-mentioned preferred scheme, the support claw groove 15 provides sufficient deformation space for the elastic support claw 2, ensuring that it can undergo free and smooth elastic deformation without being obstructed by other parts of the bracket 1 body. This not only ensures the realization of the elastic function, but also avoids excessive internal stress of the material due to insufficient deformation space, thereby extending the fatigue life of the elastic support claw 2.

[0074] To further optimize the implementation effect of this utility model, in some other embodiments, the remaining technical features are the same, the difference being that, for example... Figure 8 As shown, on the horizontal side 11 and / or the vertical side 12, a buffer protrusion 6 is provided at the front end of the junction of the horizontal side 11 and the vertical side 12 (the right angle area of ​​the corner code). The buffer protrusion 6 is used to buffer the impact between the corner code and the frame profile during the frame assembly process.

[0075] By adopting the above-mentioned preferred solution, the buffer protrusion 6 effectively prevents damage to the sharp corner area of ​​the frame by absorbing the impact kinetic energy of the frame assembly, and ensures the consistency of the final positioning of the corner code.

[0076] During the frame assembly process, in order for the elastic support claws 2 and clasps 3 of the corner bracket 1 to smoothly pass over the corner bracket insertion part 51 inside the frame profile 5, the thrust applied by the drive device will give the corner bracket kinetic energy. This kinetic energy will be concentrated at the 45° sharp corner area of ​​the frame profile 5 through the end of the corner bracket, generating huge local specific pressure, which can easily cause damage to this area and cause the corner bracket 1 to move into the profile due to over-positioning, resulting in the corner bracket spacing becoming uncontrollably smaller after frame assembly.

[0077] To solve this technical problem, in a preferred embodiment of the corner code of this utility model, a buffer protrusion 6 with a specific structure is added at the front end of the junction of the horizontal side 11 and the vertical side 12. Specifically, the buffer protrusion 6 is constructed such that the distance between the buffer protrusion 6 and the right-angle area of ​​the corner code is 0.2-0.5 mm, and its height is 0.6 mm. The buffer protrusion 6 can be, but is not limited to, a long strip-shaped protrusion (e.g., its length is half the width of the corner code, and it is integrally formed with the corner code body and is made of the same material), an array of multiple protrusions, etc.

[0078] At the moment of impact, the buffer protrusion 6 first contacts the inner wall of the frame profile 5. Through its own slight deformation, it effectively absorbs and disperses most of the impact kinetic energy, transforming the fatal concentrated impact into a controllable buffer. This avoids crushing damage to the 45° sharp corner area of ​​the frame and significantly suppresses the abnormal inward displacement of the corner bracket 1. As a result, the spacing of the corner brackets after frame assembly is stably controlled within the design tolerance range, ensuring the dimensional accuracy and structural quality of the final product.

[0079] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the outer surfaces of the horizontal side 11 and the vertical side 12 are provided with clearance grooves. The clearance grooves are used to provide placement space for the elastic support claw 2 when the corner bracket 1 body is stacked side by side.

[0080] By adopting the preferred design described above, the clearance groove design allows the upper corner bracket 1 to fall into the lower clearance groove when multiple corner brackets 1 are stacked side-to-side. This provides safe three-dimensional space for the elastic support claws 2 of the lower corner bracket 1, preventing the weight from directly pressing on the elastic support claws 2 during stacking and causing deformation. This is crucial for ensuring that the elastic support claws 2 remain in a natural, uncompressed state during storage and transportation.

[0081] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that a double-sided circular arc groove transition structure 16 is provided at the junction of the horizontal side 11 and the vertical side 12.

[0082] By adopting the above-mentioned preferred solution, the corner is optimized from a sharp corner to a double-sided circular arc groove transition structure 16, which effectively eliminates the stress concentration phenomenon and prevents the corner bracket 1 from breaking at the corner when subjected to a large load.

[0083] When the component panel is subjected to large load pressure, the component frame will bend and deform to a certain extent, resulting in a large stress concentration at the 90° junction of corner code 1. The conventional 90° sharp corner design is difficult to withstand large concentrated stress, which will cause the sharp corner to break due to stress concentration. By designing the 90° area of ​​corner code 1 as a double-sided rounded angle transition, the sharp corner at the 90° junction is avoided, effectively preventing the concentrated release of stress.

[0084] In some other embodiments, the present invention also discloses a connection structure between a corner bracket and a frame profile, including: a corner bracket 1 as disclosed in any of the above embodiments, wherein the horizontal side 11 and the vertical side 12 of the corner bracket 1 extend into the cavity 52 of the adjacent frame profile 5, and the elastic support claw 2 and the piercing 3 of the corner bracket 1 are engaged with the corner bracket insert portion 51 on the frame profile 5.

[0085] This utility model discloses a connection structure between a corner bracket and a frame profile. This connection structure integrates all the advantages of the aforementioned corner bracket 1, ultimately forming an excellent frame corner connection solution that features seamless corner splicing, reliable connection, user-friendly assembly, and pull-out resistance that meets usage requirements. Its stability and durability are significantly superior to existing technologies.

[0086] It is worth noting that the aforementioned corner bracket insert 51 is a protrusion formed by glue injection or a boss on the inner wall of the profile.

[0087] The corner code plug-in part 51 is clearly defined as an injection protrusion (which can be an injection protrusion formed by drilling holes and then injecting glue) or a protrusion on the inner wall of the profile. It is compatible with the common plug-in structure of existing composite material frames, without the need for additional modification of the frame profile 5, which lowers the technical application threshold, improves the universality and compatibility of the connection structure, and facilitates large-scale promotion and application.

[0088] This utility model discloses a corner bracket with a limiting function and its connection structure with the frame profile. It has the following beneficial effects:

[0089] First, in response to the problems of easy deformation and failure of elastic support claws, easy damage to the frame during corner code assembly, and poor load-bearing capacity in existing technologies, the corner code performance is comprehensively optimized through structural designs such as limit block 4, guide bevel 13, and load-bearing chamfer surface 14, ensuring stable connection, convenient assembly, and reliable transportation.

[0090] Secondly, the design of double interlocking of elastic support claw 2 and spur 3, interference fit, and limit protection ensures the connection stability between corner bracket 1 and frame profile 5 from multiple dimensions, the pull-out resistance meets the usage requirements, avoids corner gaps and loose connections, and improves the overall structural strength of composite material frame.

[0091] Third, the lightweight cavity design reduces material costs, while the clearance groove and load-bearing chamfered surface reduce transportation losses and the amount of isolation pads used. The introduction of inclined surfaces improves assembly efficiency, thus reducing the overall cost of corner brackets from production and transportation to assembly.

[0092] Fourth, it adapts to the corner bracket insertion structure of existing frame profiles, allowing for application without modifying the frame. It also meets various usage scenarios such as short frame stacking and large load bearing, making it widely applicable and easy to promote industrialization.

[0093] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this 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 this utility model.

[0094] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A corner code with a limiting function, characterized in that, At least one elastic support claw, at least one stab, and at least one limiting block are provided on the inner sides of both the horizontal and vertical sides of the corner bracket. The elastic support claw is located near the root of the corner bracket body. The elastic support claw has a natural state and a compressed state. In the natural state, the distance from the head of the elastic support claw to the outer surface of the corner bracket body is greater than the height of the frame profile cavity. The limiting block is located below the elastic support claw, and there is a gap between the limiting block and the elastic support claw. When the elastic support claw is compressed and deformed to contact the limiting block, the head of the elastic support claw can still be engaged with the corner code insert part inside the frame profile. The distance from the head of the spur to the outer surface of the corner code body is less than the height of the cavity of the frame profile. The spur is used to engage with the corner code insert part inside the frame profile.

2. The corner code according to claim 1, characterized in that, The gap between the limiting block and the elastic support claw is 0.2-1.2mm.

3. The corner code according to claim 1, characterized in that, The head diameter of the elastic support claw is larger than the diameter of its root and other parts, and the elastic support claw is interference-fitted with the corner bracket insert on the frame profile.

4. The corner code according to claim 1, characterized in that, Both the horizontal and vertical edges are provided with guide bevels at their ends. The guide bevels are used to guide the corner bracket body into the cavity of the frame profile. The angle of the guide bevels is 15° to 25°.

5. The corner code according to claim 1, characterized in that, A 45° load-bearing chamfer is provided at the end areas of the horizontal and vertical sides, the chamfer being used to make face contact between the corner bracket and the 45° cut edge of another frame profile during stacking.

6. The corner code according to claim 1, characterized in that, Both the horizontal and vertical sides are provided with at least one support claw groove. The root of the elastic support claw is connected to the edge of the groove opening. The support claw groove is used to provide deformation space for the elastic support claw.

7. The corner code according to claim 1, characterized in that, On the horizontal and / or vertical sides, a buffer protrusion is provided at the front end of the junction of the horizontal and vertical sides. The buffer protrusion is used to buffer the impact between the corner bracket and the frame profile during the frame assembly process.

8. The corner code according to claim 1, characterized in that, The junction of the horizontal and vertical sides is provided with a double-sided circular arc groove transition structure.

9. The connection structure between the corner bracket and the frame profile, characterized in that, include: According to any one of claims 1-8, the horizontal and vertical sides of the corner bracket extend into the cavities of the adjacent frame profile, and the elastic support claws and piercings of the corner bracket engage with the corner bracket insert portion on the frame profile.

10. The connection structure according to claim 9, characterized in that, The corner code insert part is a protrusion formed by glue injection or a boss on the inner wall of the profile.

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