A gusset expansion corner brace

Abstract

The utility model discloses a kind of angle of impact expansion angle code, including angle of impact sheet and a pair of angle code blocks, a pair of angle code blocks are symmetrically arranged in the two sides of angle of impact sheet, and it is detachably connected between angle of impact sheet and angle code block;Angle of impact sheet is L-shaped structure, it includes two supporting arms, and wedge block is provided on supporting arm, and wedge block can be inserted between a pair of angle code blocks under the action of external force.The structure of the utility model is simplified, and it is convenient for mass production, and manufacturing cost is reduced.Through the improvement of wedge block, the stress of two angle code blocks is more uniform when expanding, and the profile can be more stably adhered, and the fastening effect is more optimal.Angle of impact sheet and angle code block are detachably connected, and the split, adjustment or replacement after assembly can be easily realized, and the flexibility is strong.The utility model is simple to install, and installation does not need complex tool, and external force is applied to wedge block to achieve fixing effect, and effectively improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building door and window technology, and more specifically, to a corner expansion bracket. Background Technology

[0002] Corner brackets are commonly used hardware components in door and window connection systems, used to connect components that intersect at right angles. Among them, the impact corner bracket is a type that tightly bonds the bracket to the profile through impact or compression. This type of impact-expanding corner bracket simplifies the installation process and improves assembly efficiency. Most existing expansion corner brackets use a plastic cap that is pressed into the bracket, causing it to expand to both sides. The expanded bracket is then pressed into the inner cavity of the profile, creating a snap-fit ​​connection. However, the strength and rigidity of the plastic cap are generally lower than that of metal, and when the plastic cap is pressed inward, it cannot effectively expand the bracket to both sides. Furthermore, the simple structure of the plastic cap makes the bracket prone to shifting after impact, resulting in an inadequate fit to the profile. Utility Model Content

[0003] This utility model provides a corner expansion code to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a corner expansion code, comprising a corner piece and a pair of corner code blocks, the pair of corner code blocks being symmetrically arranged on both sides of the corner piece, the corner piece and the corner code blocks being detachably connected; the corner piece is an L-shaped structure, comprising two support arms, each support arm being provided with a wedge-shaped block, the wedge-shaped block being able to be inserted between the pair of corner code blocks under the action of external force.

[0004] Preferably, the support arm includes a forearm, a connecting arm, and a rear arm; the wedge block is disposed between the forearm and the rear arm, and the two sides of the wedge block are respectively connected to the forearm and the rear arm; the connecting arm has a through hole at its center, and the through hole is disposed opposite to the bottom of the wedge block.

[0005] Preferably, the forearm has a front ramp surface, and the rear arm has a rear ramp surface; the wedge block includes a wedge-shaped portion and a vertical portion, the vertical portion being a cuboid structure; the front and rear sides of the wedge-shaped portion are respectively provided with a front inclined surface and a rear inclined surface; a first connecting strip is provided between the front inclined surface and the front ramp surface, and the two are connected by the first connecting strip; a second connecting strip is provided between the rear inclined surface and the rear ramp surface, and the two are connected by the second connecting strip.

[0006] Preferably, both sides of the wedge-shaped portion are planar; the width of the left and right sides of the wedge-shaped portion is greater than the width of the left and right sides of the vertical portion; a transition slope is provided between the wedge-shaped portion and the vertical portion.

[0007] Preferably, a third connecting strip is provided on one side of the vertical part, and a fourth connecting strip is provided on the other side; one end of the third connecting strip is connected to the forearm, and one end of the fourth connecting strip is connected to the rear arm.

[0008] Preferably, the connecting arm is provided with a first dovetail block on each side, and the corner block is provided with a first dovetail groove that cooperates with the first dovetail block, and the first dovetail block and the first dovetail groove cooperate with each other; the corner block is provided with a second dovetail groove on the top, and the corner piece is provided with a second dovetail block on each side, and the second dovetail block and the second dovetail groove cooperate with each other.

[0009] Preferably, the outer surface of the corner block is provided with a glue flow groove, which is connected to the second dovetail groove.

[0010] Preferably, the glue-dispensing groove is provided on both sides, and the corner piece is provided with an inner groove that matches the triangular groove, and the inner groove is provided with a glue-dispensing port.

[0011] Preferably, the top of the rear arm is provided with a cover plate, and the front end of the cover plate is provided with a snap-fit ​​plate; the inner side of the cover plate is in contact with the surface of the corner block; the corner block is provided with an adhesive guide groove, and the snap-fit ​​plate is snapped into the side wall of the adhesive guide groove.

[0012] Preferably, both the corner piece and the corner code block are integrally formed structures, and both are made of metal.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: The corner expansion bracket of this utility model consists of a corner piece and a pair of bracket blocks, which has a simplified structure, facilitates mass production, and reduces manufacturing costs. By improving the wedge-shaped blocks on the corner piece, the two bracket blocks are subjected to more uniform force when expanding, which can more stably fit the profile and achieve a better fastening effect. The corner piece and the bracket blocks are detachably connected. Compared with welding, gluing, and other fixing methods, it can be easily disassembled, adjusted, or replaced after assembly, making it widely applicable and highly flexible. This utility model is simple to install, requiring no complicated tools. The fixing effect is achieved by applying external force to the wedge blocks, effectively improving assembly efficiency. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the impact angle expansion bracket according to an embodiment of the present invention;

[0015] Figure 2 This is a front view of the impact corner expansion bracket according to an embodiment of the present utility model;

[0016] Figure 3 This is an exploded view of the impact angle expansion bracket of this utility model embodiment;

[0017] Figure 4 This is an exploded view of the impact angle expansion bracket of this utility model embodiment from another perspective;

[0018] Figure 5 This is a structural diagram of the impact corner piece of the impact corner expansion bracket according to an embodiment of the present invention;

[0019] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0020] exist Figures 1 to 6 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0021] 1--Corner plate, 11--Outrigger, 111--Forearm, 111a--Front ramp, 112--Connecting arm, 112a--Through hole, 112b--First dovetail block, 113--Rear arm, 113a--Rear ramp, 113b--Cover plate, 113c--Snap-fit ​​plate, 114--First connecting strip, 115--Second connecting strip, 116--Third connecting strip, 117--Fourth connecting strip Connecting strip, 118--inner groove, 119--glue outlet, 12--wedge block, 121--wedge part, 121a--front inclined surface, 121b--rear inclined surface, 122--vertical part, 123--transition inclined surface, 13--second dovetail block, 2--corner block, 21--first dovetail groove, 22--second dovetail groove, 23--glue outlet groove, 24--triangular groove, 25--glue guide groove. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please refer to Figures 1 to 6 This utility model provides a corner expansion bracket, including a corner piece 1 and a pair of corner bracket blocks 2. The pair of corner bracket blocks 2 are symmetrically arranged on both sides of the corner piece 1, and the corner piece 1 and the corner bracket blocks 2 are detachably connected. The corner piece 1 has an L-shaped structure and includes two support arms 11. The support arms 11 are provided with wedge blocks 12, and the wedge blocks 12 can be inserted between the pair of corner bracket blocks 2 under the action of external force.

[0026] In this embodiment of the invention, the corner bracket 1 and the pair of corner bracket blocks 2 are detachable. Therefore, the size of the corner bracket blocks 2 can be flexibly selected according to the size of the profile cavity. After selecting a suitable corner bracket block 2, a pair of symmetrical corner bracket blocks 2 are connected to both sides of the corner bracket 1 to form a complete corner expansion bracket. During installation, the corner expansion bracket is aligned with the right-angle joint of the two substrates, aligning the impact holes on the wedge block 12 profile on the support arm 11. Then, external force (such as tapping, pressing, or bolt tightening) is applied to the wedge block 12 on the support arm 11, causing the wedge block 12 to insert between the pair of corner bracket blocks 2. Utilizing the self-locking characteristic of the wedge structure, the wedge block 12 and the corner bracket block 2 are tightly engaged, generating a continuous preload force, ultimately achieving a stable right-angle connection between the two profiles.

[0027] Through the above structural setup, the compression between the wedge block 12 and the corner code block 2 makes the outer side of the corner code block 2 fit tightly against the inner wall of the profile, which can be fixed without additional connection structure, avoiding the risk of profile cracking and deformation caused by multiple drilling reinforcements, and significantly improving the load-bearing capacity of the overall connection.

[0028] Preferably, the support arm 11 includes a front arm 111, a connecting arm 112, and a rear arm 113; the wedge block 12 is disposed between the front arm 111 and the rear arm 113, and both sides of the wedge block 12 are connected to the front arm 111 and the rear arm 113 respectively; the connecting arm 112 has a through hole 112a at its center, and the through hole 112a is opposite to the bottom of the wedge block 12. In this embodiment, the two sides of the wedge block 12 are connected to the front arm 111 and the rear arm 113 respectively, which can keep the position of the wedge block 12 stable so as to reduce positional displacement during subsequent impact operations. The through hole 112a at the center of the connecting arm 112 is directly opposite the bottom of the wedge block 12 so that when the wedge block 12 is subjected to external force, its bottom can be inserted downward into the through hole 112a.

[0029] Preferably, the forearm 111 is provided with a front ramp 111a, and the rear arm 113 is provided with a rear ramp 113a; the wedge block 12 includes a wedge portion 121 and a vertical portion 122, the vertical portion 122 being a cuboid structure; the front and rear sides of the wedge portion 121 are respectively provided with a front inclined surface 121a and a rear inclined surface 121b; a first connecting strip 114 is provided between the front inclined surface 121a and the front ramp 111a, and the two are connected by the first connecting strip 114; a second connecting strip 115 is provided between the rear inclined surface 121b and the rear ramp 113a, and the two are connected by the second connecting strip 115.

[0030] In this embodiment, the front ramp surface 111a of the forearm 111 and the rear ramp surface 113a of the rear arm 113 form a guide structure with the front inclined surface 121a and the rear inclined surface 121b of the wedge portion 121, respectively. This design allows the wedge block 12 to be smoothly advanced along a preset angle when inserted into the corner block 2, thanks to the guiding effect of the inclined surfaces, avoiding jamming or tilting caused by angle deviation. Simultaneously, the inclined structure decomposes external forces (such as impact forces) into components along the inclined direction, reducing insertion resistance and making assembly more effortless and efficient. Furthermore, a large space is formed between the front ramp surface 111a and the rear ramp surface 113a, allowing the first connecting strip 114 and the second connecting strip 115 to remain within this large space after being broken by impact, preventing interference with the insertion of the wedge block 12. The vertical part 122 of the cuboid structure, when the corner brackets are not installed, has a pair of corner bracket blocks 2 on its left and right sides respectively. The flat surface of the cuboid can make the alignment between the pair of corner bracket blocks 2 more neat. After being connected to the corner bracket piece 1, the spacing between the two corner bracket pieces can be well controlled.

[0031] Preferably, both the left and right sides of the wedge-shaped portion 121 are flat; the width of the left and right sides of the wedge-shaped portion 121 is greater than the width of the left and right sides of the vertical portion 122; a transition slope 123 is provided between the wedge-shaped portion 121 and the vertical portion 122. In this embodiment, the flat design allows the wedge-shaped portion 121 to form a large-area close fit with the inner wall of the corner block 2 when inserted between the corner blocks 2. Compared with curved or irregularly shaped sides, this reduces the contact gap and improves friction and engagement stability. At the same time, the flat contact can effectively avoid loosening caused by local stress concentration and strengthen the overall connection's resistance to deformation. The width of the wedge-shaped portion 121 is greater than that of the vertical portion 122, forming a stepped structure. To facilitate insertion, the wedge-shaped portion 121 and the vertical portion 122 are connected by a transition slope 123, which forms a smooth transition between the dimensional differences between the two. When assembling the corner brackets, the vertical part 122 first enters the gap between the corner bracket blocks 2, achieving initial positioning through its narrow width. As insertion progresses, the transition slope 123 guides the wedge-shaped part 121 to gradually enter between the two corner bracket blocks 2, avoiding jamming caused by sudden size changes and making the entire insertion process smoother and less strenuous. When the wedge-shaped part 121 is inserted into the gap between the corner bracket blocks 2, the wider part will generate a stronger lateral compressive force on the corner bracket blocks 2 on both sides, thereby fixing the corner bracket to the profile.

[0032] Preferably, a third connecting strip 116 is provided on one side of the vertical part 122, and a fourth connecting strip 117 is provided on the other side; one end of the third connecting strip 116 is connected to the forearm 111, and one end of the fourth connecting strip 117 is connected to the rear arm 113. In this embodiment, the third connecting strip 116 (connecting the vertical part 122 and the forearm 111) and the fourth connecting strip 117 (connecting the vertical part 122 and the rear arm 113) cooperate with the first and second connecting strips 115 to form a three-dimensional force-bearing structure with the wedge part 121, the forearm 111, and the rear arm 113. This structure can evenly transmit external force from the wedge block 12 to each connecting strip, thereby making the direction of the wedge block 12 more accurate when inserted. This provides a basic guarantee for the smooth insertion and locking of the wedge part 121 and reduces assembly errors caused by guide deviation.

[0033] Preferably, the connecting arm 112 has a first dovetail block 112b on each side, and the corner bracket 2 has a first dovetail groove 21 that mates with the first dovetail block 112b. The first dovetail block 112b and the first dovetail groove 21 cooperate with each other. The corner bracket 2 has a second dovetail groove 22 on its top, and the corner bracket 1 has a second dovetail block 13 on each side. The second dovetail block 13 and the second dovetail groove 22 cooperate with each other. In this embodiment, the trapezoidal or isosceles trapezoidal fit of the dovetail block and the dovetail groove has a natural self-locking function. Specifically, when the first dovetail block 112b is embedded in the first dovetail groove 21 and the second dovetail block 13 is embedded in the second dovetail groove 22, a three-point connection structure is formed between the corner bracket 2 and the corner bracket 1, which can form a stable connection effect. Furthermore, when the wedge block 12 is subjected to external force causing the two corner bracket blocks 2 to expand, the two corner bracket blocks 2 separate along a fixed direction under the cooperation and constraint of the dovetail block and dovetail groove, avoiding displacement during separation. This makes the cooperation between the corner piece 1 and the corner bracket block 2 more precise and improves the fit of the profile. Through the above structural design, the dovetail fit design and the core structure of the wedge locking complement each other, retaining the convenience of disassembly while preventing displacement through multi-dimensional constraints, effectively improving the convenience and connection strength of door and window connections.

[0034] Preferably, the outer surface of the corner code block 2 is provided with a glue flow groove 23, which is connected to the second dovetail groove 22. In this embodiment, when adhesive is used for assisted fixation, the glue flow groove 23 can serve as a channel for guiding the glue. When the glue is injected from the glue flow groove 23 on the outer surface of the corner code block 2, it will flow into the second dovetail groove 22 along the connected path, evenly filling the second dovetail block 13 and the second dovetail groove 22, and can enter the interior of the corner code block 2 along the glue flow groove 23. In addition, under the action of the corner piece 1, there is a large gap between the two corner code blocks 2, which allows the glue to quickly fill the entire corner code.

[0035] Preferably, the glue dispensing groove 23 has triangular grooves 24 on both sides, and the corner piece 1 has an inner groove 118 that mates with the triangular grooves 24. The inner groove 118 has a glue dispensing port 119. In this embodiment, the inclined wall of the triangular structure increases the contact area between the glue and the corner block 2 and the corner piece 1. The triangular groove 24 and the inner groove 118 of the corner piece 1 form a complementary cavity space. When the corner piece 1 and the corner block 2 are assembled, this cavity can hold more glue, improving the connection strength. The glue dispensing port 119 facilitates the flow of glue and quickly fills the gap between the corner blocks 2, connecting the corner block 2 and the corner piece 1 into one unit, reducing the possibility of loosening later.

[0036] Preferably, the top of the rear arm 113 is provided with a cover plate 113b, and the front end of the cover plate 113b is provided with a snap-fit ​​plate 113c; the inner side of the cover plate 113b is in contact with the surface of the corner code block 2; the corner code block 2 is provided with a guide groove 25, and the snap-fit ​​plate 113c is snapped into the side wall of the guide groove 25. In this embodiment, the inner side of the cover plate 113b is in close contact with the surface of the corner code block 2, and the cover plate 113b can serve as an external reinforcing layer for the corner code block 2, dispersing the external pressure on the corner code block 2. At the same time, the cover plate 113b and the corner code block 2 further enhance the connection strength under the action of the adhesive. The adhesive guide groove 25 on the corner bracket block 2 serves as a channel for the flow of adhesive liquid, guiding the adhesive liquid to the contact area between the snap-fit ​​plate 113c and the adhesive guide groove 25. The adhesive liquid will fill the gap between the snap-fit ​​plate 113c and the side wall of the adhesive guide groove 25, and after curing, it forms an adhesive layer, so that the snap-fit ​​and the side wall of the adhesive guide groove 25 form a dual connection structure of mechanical interlocking and adhesive fixation, further improving the stability of the entire corner bracket.

[0037] Preferably, both the corner bracket 1 and the corner block 2 are integrally formed structures, and both are made of metal. In this embodiment, integral forming means that the parts themselves do not have splicing welds or assembly gaps, avoiding structural weaknesses caused by splicing processes such as weak welding or loose screws. For example, if the corner bracket 1 is composed of multiple spliced ​​segments, stress concentration is likely to occur at the joints when subjected to force, while integral forming ensures that its overall mechanical properties are uniform and can withstand greater tensile, shear, or torque forces. Furthermore, the corner block 2 can be manufactured using an extrusion forming process, while the corner bracket 1 can be manufactured using a casting process.

[0038] Compared with existing technologies, the advantages of this utility model are as follows: The corner expansion bracket of this utility model consists of a corner piece and a pair of bracket blocks, which has a simplified structure, facilitates mass production, and reduces manufacturing costs. By improving the wedge-shaped blocks on the corner piece, the two bracket blocks are subjected to more uniform force when expanding, which can more stably fit the profile and achieve a better fastening effect. The corner piece and the bracket blocks are detachably connected. Compared with welding, gluing, and other fixing methods, it can be easily disassembled, adjusted, or replaced after assembly, making it widely applicable and highly flexible. This utility model is simple to install, requiring no complicated tools. The fixing effect is achieved by applying external force to the wedge blocks, effectively improving assembly efficiency.

[0039] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A corner expansion bracket, characterized in that, It includes a corner piece (1) and a pair of corner blocks (2), the pair of corner blocks are symmetrically arranged on both sides of the corner piece, and the corner piece and the corner blocks are detachably connected; the corner piece is an L-shaped structure, which includes two support arms (11), and a wedge block (12) is provided on the support arm, and the wedge block can be inserted between the pair of corner blocks under the action of external force.

2. The corner expansion code according to claim 1, characterized in that, The support arm includes a forearm (111), a connecting arm (112), and a rear arm (113); the wedge block is disposed between the forearm and the rear arm, and the two sides of the wedge block are respectively connected to the forearm and the rear arm; the center of the connecting arm is provided with a through hole (112a), and the through hole is disposed opposite to the bottom of the wedge block.

3. The impact angle expansion bracket according to claim 2, characterized in that, The forearm has a front ramp (111a), and the rear arm has a rear ramp (113a); the wedge block includes a wedge-shaped part (121) and a vertical part (122), the vertical part being a cuboid structure; the front and rear sides of the wedge-shaped part are respectively provided with a front inclined surface (121a) and a rear inclined surface (121b); a first connecting strip (114) is provided between the front inclined surface and the front ramp, and the two are connected by the first connecting strip; a second connecting strip (115) is provided between the rear inclined surface and the rear ramp, and the two are connected by the second connecting strip.

4. The impact angle expansion bracket according to claim 3, characterized in that, Both sides of the wedge-shaped portion are flat; the width of the left and right sides of the wedge-shaped portion is greater than the width of the left and right sides of the vertical portion; a transition slope (123) is provided between the wedge-shaped portion and the vertical portion.

5. The corner expansion code according to claim 3, characterized in that, A third connecting strip (116) is provided on one side of the vertical part, and a fourth connecting strip (117) is provided on the other side; one end of the third connecting strip is connected to the forearm, and one end of the fourth connecting strip is connected to the rear arm.

6. The corner expansion code according to claim 2, characterized in that, The connecting arm is provided with a first dovetail block (112b) on both sides, and the corner block is provided with a first dovetail groove (21) that cooperates with the first dovetail block. The first dovetail block and the first dovetail groove cooperate with each other. The corner block is provided with a second dovetail groove (22) on the top, and the corner piece is provided with a second dovetail block (13) on both sides. The second dovetail block and the second dovetail groove cooperate with each other.

7. The corner expansion bracket according to claim 6, characterized in that, The outer surface of the corner block is provided with a glue flow groove (23), which is connected to the second dovetail groove.

8. The corner expansion code according to claim 7, characterized in that, The glue-dispensing groove is provided with triangular grooves (24) on both sides, and the corner piece is provided with an inner groove (118) that matches the triangular groove, and the inner groove is provided with a glue-dispensing port (119).

9. The impact angle expansion bracket according to any one of claims 2 to 8, characterized in that, The top of the rear arm is provided with a cover plate (113b), and the front end of the cover plate is provided with a snap-fit ​​plate (113c); the inner side of the cover plate is in contact with the surface of the corner code block; the corner code block is provided with a guide groove (25), and the snap-fit ​​plate is snapped into the side wall of the guide groove.

10. The impact angle expansion bracket according to claim 9, characterized in that, Both the corner piece and the corner code block are integrally formed structures, and both are made of metal.

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