Frame structure

Abstract

A frame structure, belonging to the technical field of solar photovoltaics. The frame structure comprises frames, wherein each frame comprises a cavity; and each frame is provided with a boss portion, the boss portion comprising an inner recessed surface recessed outside the cavity and an outer protruding surface protruding inside the cavity, and the boss portion being provided with a removal hole running through the inner recessed surface and the outer protruding surface, the removal hole being configured to allow a removal tool to penetrate into the cavity. According to the frame structure provided in the present invention, by means of a removal tool penetrating into the cavity, the outer protruding surface can be deformed by pressing same towards the inner recessed surface through the removal tool, thereby flattening the boss portion; that is, the limit of the boss portion is disabled, thereby facilitating detachment, without causing damage, achieving reutilization and saving resources.

Description

A frame structure

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 17, 2024, with application number 202410072533.4 and invention name “A Frame Structure”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of solar photovoltaic technology, and in particular to a frame structure. Background Art

[0003] A photovoltaic module includes a photovoltaic panel and a frame structure supported on all sides. The frame structure is usually formed by four frames together to form a rectangle. Corner codes are inserted into the cavities at the ends of two adjacent frames to achieve a connection between the long frame and the short frame.

[0004] In the prior art, the corner brackets and the frame are usually fixed together using an inverted tooth structure. That is, the corner brackets and the cavity are each provided with interlocking inverted teeth. Once the corner brackets are pushed into the cavity, they are difficult to withdraw, thus achieving a mutually fixed effect. However, most photovoltaic panels have a service life of 25 years, while frame structures made of aluminum or steel can have a service life of more than 50 years. When a photovoltaic panel is scrapped, the frame structure will be torn and damaged by forceful disassembly, and it cannot be repaired. As a result, the frame structure must be scrapped together with the photovoltaic panel, resulting in waste of the frame structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a frame structure that is easy to assemble and disassemble, reusable, and saves resources.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A frame structure is provided, including a frame, the frame including a cavity, a boss portion provided on the frame, the boss portion including an inner concave surface recessed outside the cavity and an outer convex surface convexly provided inside the cavity, a disassembly hole passing through the inner concave surface and the outer convex surface is opened on the boss portion, and the disassembly hole is used for allowing a disassembly tool to pass through the cavity.

[0008] Optionally, the frame includes a frame inner plate, a frame upper plate, a frame outer plate and a frame lower plate connected in sequence, the frame inner plate, the frame upper plate, the frame outer plate and the frame lower plate enclose a cavity, and a boss portion is provided on the frame inner plate.

[0009] Optionally, a first boss is protruded from a middle area of ​​a side of the frame inner plate facing the frame outer plate, and / or a second boss is protruded from a middle area of ​​a side of the frame outer plate facing the frame inner plate.

[0010] Optionally, a clamping plate is provided on the side of the frame upper plate facing away from the frame lower plate, a positioning groove is formed between the clamping plate and the frame upper plate, the opening of the positioning groove is located on one side of the frame inner plate, and a glue holding groove is provided on the clamping plate.

[0011] Optionally, it further includes an angle code, wherein the angle code includes two connecting arms arranged at an angle, a slot is provided on the inner edge of the connecting arm, the connecting arm is inserted into the cavity, and the boss portion is engaged with the slot; wherein,

[0012] A clearance space is formed between the boss portion and the slot wall of the clamping slot, and the disassembly hole is used for allowing a disassembly tool to pass through the clearance space.

[0013] Optionally, the end of the connecting arm includes a first end face and a second end face set at an angle, the first end face is connected to the inner edge of the connecting arm and is inclined toward the outer edge of the connecting arm, and the second end face is connected to the outer edge of the connecting arm and is inclined toward the inner edge of the connecting arm.

[0014] Optionally, the end of the connecting arm includes a first end surface, and the first end surface is connected to the slot side wall of the slot.

[0015] Optionally, the slot includes two oppositely disposed slot side walls, and the slot side walls are inclined outward from the slot bottom to the open end of the slot.

[0016] Optionally, an ear protrusion is formed on a side wall of the slot extending away from the end of the connecting arm.

[0017] Optionally, a distance H3 between the ear protrusion and an outer edge of the connecting arm is greater than a height H2 of the cavity.

[0018] Optionally, the corner code is provided with a corner receiving groove between the inner edges of the two connecting arms.

[0019] Optionally, at least one chip groove is respectively formed on the outer edges of the two connecting arms. Beneficial effects:

[0020] The frame structure provided by the present invention can be passed through a disassembly tool into the cavity when the photovoltaic panel needs to be disassembled, and the disassembly tool can be used to squeeze the outer convex surface toward the inner concave surface to deform the boss portion so that the boss portion becomes flat. Even if the limit of the boss portion fails, it is convenient to disassemble without causing damage, thereby achieving reuse and saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of the assembly structure of the frame structure provided by the present invention;

[0022] FIG2 is a schematic structural diagram of an angle code provided by the present invention;

[0023] FIG3 is a schematic diagram of the cross-sectional structure of the frame provided by the present invention.

[0024] In the figure: 100, corner code; 110, connecting arm; 111, slot; 1111, slot side wall; 112, first end face; 113, second end face; 114, tip; 115, ear protrusion; 116, groove; 117, corner groove; 118, chip groove; 200, frame; 201, cavity; 210, frame inner plate; 211, boss portion; 2111, inner concave surface; 2112, outer convex surface; 212, disassembly hole; 213, first boss; 220, frame upper plate; 230, frame outer plate; 231, second boss; 240, frame lower plate; 241, extension portion; 242, mounting hole; 250, clamping plate; 2501, positioning groove; 2502, glue groove; 251, support portion; 252, parallel portion. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0026] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0029] Referring to Figures 1 to 3, this embodiment provides a frame structure, which includes a frame 200, the frame 200 includes a cavity 201, and a boss portion 211 is provided on the frame 200. The boss portion 211 includes an inner concave surface 2111 recessed outside the cavity 201 and an outer convex surface 2112 convex inside the cavity 201. A disassembly hole 212 is provided on the boss portion 211, which passes through the inner concave surface 2111 and the outer convex surface 2112. The disassembly hole 212 is used for allowing a disassembly tool (not shown) to pass through the cavity 201.

[0030] In this embodiment, when the photovoltaic panel needs to be disassembled, a disassembly tool can be inserted into the cavity 201, and the disassembly tool can be used to squeeze the outer convex surface 2112 toward the inner concave surface 2111 to deform it, so that the boss portion 211 becomes flat. Even if the limit of the boss portion 211 fails, it is convenient to disassemble without causing damage, thereby achieving reuse and saving resources.

[0031] In this embodiment, as shown in Figure 1, the frame 200 includes a frame inner plate 210, a frame upper plate 220, a frame outer plate 230 and a frame lower plate 240 connected in sequence. The frame inner plate 210, the frame upper plate 220, the frame outer plate 230 and the frame lower plate 240 enclose a cavity 201, and a boss portion 211 is provided on the frame inner plate 210.

[0032] For example, the depth d of the inner concave surface 2111 can be 1 mm to 1.8 mm, which ensures a stable engagement between the boss portion 211 and the slot 111 while facilitating the molding and shaping of the boss portion 211. The depth d of the inner concave surface 2111 can be understood as the distance between the surface of the inner concave surface 2111 within a 1 mm distance from the edge of the disassembly hole 212 at one end of the inner concave surface 2111 and the side surface of the frame inner plate 210 facing away from the frame outer plate 230.

[0033] In this embodiment, referring to Figures 1 to 3, the frame 200 structure also includes a corner code 100, which includes two connecting arms 110 arranged at an angle, and a card slot 111 is provided on the inner edge of the connecting arm 110. The connecting arm 110 is inserted into the cavity 201, and the boss portion 211 is engaged with the card slot 111; wherein, a clearance space is formed between the boss portion 211 and the groove wall of the card slot 111, and the disassembly hole 212 is used for allowing the disassembly tool to pass through the clearance space.

[0034] In this embodiment, when the frame structure is in use, the connecting arm 110 is inserted into the cavity 201, and the boss portion 211 is engaged with the slot 111, so that the connection between the corner bracket 100 and the frame 200 is stable and reliable, and the corner bracket 100 and the frame 200 are fixed, effectively ensuring the structural stability of the frame structure and facilitating assembly. When the photovoltaic panel is scrapped, a disassembly tool can be used to penetrate the disassembly hole 212 and place it in the clearance space. The disassembly tool can be used to squeeze the outer convex surface 2112 toward the inner concave surface 2111 to deform it, thereby breaking the engagement between the boss portion 211 and the slot 111, allowing the connecting arm 110 to be withdrawn from the cavity 201, making it easy to disassemble without causing damage, achieving reuse and saving resources.

[0035] It is understandable that by using a disassembly tool to squeeze the outer convex surface 2112 toward the inner concave surface 2111 to deform it, the boss portion 211 can be made to overlap with the frame inner plate 210 .

[0036] Exemplarily, the angle between the two connecting arms 110 is set to 80°-100°, such as 90°. In this embodiment, the frame 200 includes two long frames 200 and two short frames 200, and the two long frames 200 and the two short frames 200 form a rectangular shape.

[0037] Exemplarily, the disassembly hole 212 includes but is not limited to a waist hole, an oblong hole or a rectangular hole. For example, when the disassembly hole 212 is an oblong hole, the width of the disassembly hole 212 is 4mm-6mm, and the length is 8mm-12mm. The disassembly tool is T-shaped. Exemplarily, when disassembling the frame structure, first, the frame structure is placed in a disassembly tool; then the T-shaped head of the disassembly tool is passed through the disassembly hole 212 into the clearance space, and the disassembly tool is rotated 15°-90°, such as 30° or 45°; finally, the disassembly tool is pulled to squeeze the T-shaped head against the outer convex surface 2112, causing the boss portion 211 to deform, thereby destroying the snap connection between the boss portion 211 and the slot 111, and completing the disassembly. The disassembly tool and the disassembly tool (not shown) are arranged according to the shape of the frame structure, and are not the focus of protection of this application, so they will not be described in detail this time. In this embodiment, the T-shaped head of the disassembly tool may be smaller than the disassembly hole 212 , for example, the T-shaped head is 1 mm to 2 mm smaller than the disassembly hole 212 .

[0038] For example, after being squeezed by the disassembly tool, the frame 200 can be squeezed toward the outer convex surface 2112 at the disassembly hole 212 by a convex pressing tool (not shown) to squeeze the inner concave surface 2111 so that the boss portion 211 is restored to its deformed state. In this embodiment, the connecting arm 110 can be first inserted into the cavity 201, and then the convex pressing tool can be used to squeeze the inner concave surface 2111 so that the boss portion 211 is restored to its deformed state, thereby achieving the snap connection between the boss portion 211 and the slot 111. Of course, the boss portion 211 can also be restored to its deformed state first, and then the connecting arm 110 can be inserted into the cavity 201. The convex pressing tool is configured according to the frame structure and is not the focus of protection of this application, so this application will not elaborate on it in detail.

[0039] In this embodiment, as shown in Figures 1 and 2, the end of the connecting arm 110 includes a first end surface 112 and a second end surface 113 arranged at an angle. The first end surface 112 is connected to the inner edge of the connecting arm 110 and is inclined toward the outer edge of the connecting arm 110. The second end surface 113 is connected to the outer edge of the connecting arm 110 and is inclined toward the inner edge of the connecting arm 110. It can be understood that the end of the connecting arm 110 is triangular in shape to facilitate the insertion of the connecting arm 110 into the mold cavity 201.

[0040] Exemplarily, the included angle α between the second end surface 113 and the outer edge of the connecting arm 110 is 10°-15°, which is more conducive to pushing the connecting arm 110 smoothly into the cavity 201.

[0041] In one feasible embodiment, the first end face 112 of the connecting arm 110 is connected to the groove sidewall 1111 of the locking groove 111, that is, a tip 114 is formed between the first end face 112 and the groove sidewall 1111 of the locking groove 111. When the connecting arm 110 is pushed into the mold cavity 201, the friction between the tip 114 and the boss portion 211 is relatively small, which is more conducive to the connecting arm 110 being smoothly pushed into the mold cavity 201. In addition, when the boss portion 211 is first deformed and then the connecting arm 110 is inserted into the mold cavity 201, the tip 114 and the boss portion 211 squeeze each other, which can reduce the amount of bending and giving way of the connecting arm 110 at the locking groove 111, facilitate the tip 114 to pass over the boss portion 211, and effectively prevent the connecting arm 110 from breaking at the locking groove 111.

[0042] In a feasible embodiment, the relationship between the distance H1 between the tip 114 and the outer edge of the connecting arm 110 and the distance H2 between the upper plate 220 of the frame and the lower plate 240 of the frame is: H1 = H2 ± 0.08 mm. While ensuring the stable engagement between the boss portion 211 and the slot 111, the connecting arm 110 can be smoothly pushed into the mold cavity 201.

[0043] In one feasible embodiment, the slot 111 includes two opposing sidewalls 1111, which are inclined outward from the bottom of the slot 111 to the open end. It is understood that the slot 111 is trapezoidal or triangular in shape, preferably, the slot 111 is trapezoidal in shape. For example, the opening width b1 of the slot 111 is 10 mm to 20 mm, the bottom width b2 of the slot 111 is 5 mm to 10 mm, and the height h1 of the slot 111 is 4 mm to 6 mm.

[0044] In a feasible embodiment, an ear protrusion 115 is formed on the groove side wall 1111 on the side away from the end of the connecting arm 110, and the ear protrusion 115 and the tip 114 jointly clamp the boss portion 211 to achieve the clamping connection between the boss portion 211 and the groove 111. Exemplarily, the distance H3 between the ear protrusion 115 and the outer edge of the connecting arm 110 is greater than the height H2 of the cavity 201. The height H2 of the cavity 201 refers to the distance between the frame upper plate 220 and the frame lower plate 240. For example, the distance H3 between the ear protrusion 115 and the outer edge of the connecting arm 110 is 0.05mm-0.12mm greater than the distance H2 between the frame upper plate 220 and the frame lower plate 240. In this embodiment, when the connecting arm 110 is first inserted into the mold cavity 201 and then the inner concave surface 2111 is squeezed by the convex pressing tool, the ear protrusion 115 is squeezed by the mold cavity 201, and the connecting arm 110 is pre-fixed in the mold cavity 201 through friction. When the inner concave surface 2111 is squeezed by the convex pressing tool, the connecting arm 110 is effectively prevented from shifting, so that the boss portion 211 can be accurately engaged in the slot 111. For example, a groove 116 is further provided on the inner edge of the connecting arm 110, and the groove 116 extends to the ear protrusion 115.

[0045] In one feasible embodiment, the corner bracket 100 defines a corner recess 117 between the inner edges of the two connecting arms 110. The opening of the corner recess 117 forms a 45° angle with the connecting arms 110. This ensures a tight fit between adjacent frames 200 when misaligned during assembly. For example, the misalignment between adjacent frames 200 can be less than or equal to 0.2 mm.

[0046] In a feasible embodiment, at least one chip groove 118 is respectively provided on the outer edge of the two connecting arms 110. For example, one to three. When the number of the chip grooves 118 is greater than one, the chip grooves 118 are spaced apart along the length direction of the connecting arm 110. Exemplarily, the shape of the chip groove 118 includes but is not limited to a rectangle, a trapezoid, or an arc. Exemplarily, the width b3 of the chip groove 118 is 2mm-7mm, and the height h2 is 0.5mm-2mm. In this embodiment, a small amount of fine chips may remain in the cavity 201 during the cutting process of the frame 200. When the connecting arm 110 is pushed into the cavity 201, the fine chips can be squeezed into the chip groove 118 to avoid the situation where the connecting arm 110 is not pushed into the cavity 201.

[0047] In this embodiment, as shown in FIG3 , the frame 200 may be made of metal, such as aluminum. In this embodiment, the frame 200 may be made of aluminum profile.

[0048] Exemplarily, the thickness D1 of the frame upper plate 220 is 1.2 mm-1.6 mm.

[0049] Exemplarily, the thickness D2 of the frame inner plate 210 is 1.2 mm-1.8 mm.

[0050] Exemplarily, the thickness D3 of the frame outer plate 230 is 1.2 mm-2 mm.

[0051] Exemplarily, the thickness D4 of the frame lower plate 240 is 1.2 mm-2 mm.

[0052] In some embodiments, a first boss 213 is provided in the middle area of ​​the frame inner plate 210 facing the frame outer plate 230 to position the connecting arm 110 and reduce the contact area between the frame 200 and the connecting arm 110, thereby reducing friction and facilitating smooth insertion of the connecting arm 110 into the mold cavity 201. The disassembly hole 212 extends through the first boss 213. By way of example, the area of ​​the first boss 213 can occupy 70%-80% of the area of ​​the frame inner plate 210, with a 10-15% gap reserved on both sides of the first boss 213 for accommodating fine chips. The thickness d1 of the first boss 213 can be 0.3 mm-1 mm.

[0053] In some embodiments, a second boss 231 is provided in a middle area of ​​one side of the frame outer plate 230 facing the frame inner plate 210 to position the connecting arm 110 and reduce the contact area between the frame 200 and the connecting arm 110, thereby reducing friction and facilitating smooth insertion of the connecting arm 110 into the mold cavity 201. Exemplarily, the area of ​​the second boss 231 can occupy 70%-80% of the area of ​​the frame outer plate 230, with a 10-15% gap reserved on both sides of the second boss 231 for accommodating fine chips, and the thickness d2 of the second boss 231 can be 0.3 mm-1 mm.

[0054] In some embodiments, a first boss 213 is protruded from the middle area of ​​one side of the frame inner plate 210 facing the frame outer plate 230, and a second boss 231 is protruded from the middle area of ​​one side of the frame outer plate 230 facing the frame inner plate 210, which is more conducive to pushing the connecting arm 110 smoothly into the mold cavity 201.

[0055] Exemplarily, the distance B1 between the first boss 213 and the second boss 231 is greater than the thickness of the connecting arm 110, so that the connecting arm 110 can be smoothly pushed into the cavity 201. For example, the distance B1 between the frame inner plate 210 and the frame outer plate 230 is 0-0.05 mm greater than the thickness of the connecting arm 110.

[0056] In this embodiment, referring again to FIG. 3 , the frame lower plate 240 includes an extension 241 that protrudes from the side of the frame inner plate 210 facing away from the frame outer plate 230. The extension 241 is provided with a mounting hole 242. In this embodiment, the frame 200 can be secured by bolts passing through the mounting holes 242 and threadedly connected to external support members. For example, to enhance the stability of the frame 200, horizontal stripes can be provided on the extension 241.

[0057] Exemplarily, the extension length L of the extension portion 241 is 15 mm to 30 mm to form a good supporting effect.

[0058] Exemplarily, the shape of the mounting hole 242 includes but is not limited to an oblong shape.

[0059] In this embodiment, referring to FIG3 , a clamping plate 250 is provided on the side of the frame upper plate 220 facing away from the frame lower plate 240. A positioning groove 2501 is formed between the clamping plate 250 and the frame upper plate 220. The opening of the positioning groove 2501 is located on one side of the frame inner plate 210. In this embodiment, the positioning groove 2501 is used to accommodate the edge of a solar panel (not shown), and a sealant is filled in the positioning groove 2501 to fix the edge of the solar panel in the positioning groove 2501. In this embodiment, the frame upper plate 220 is used to support the edge of the solar panel. To ensure that the frame 200 stably and reliably supports the edge of the solar panel, the support width B2 of the edge of the solar panel supported by the frame upper plate 220 is 10 mm to 16 mm.

[0060] For example, the width B3 of the positioning groove 2501 is greater than the thickness of the edge of the solar panel. For example, the width B3 of the positioning groove 2501 is 1 mm to 2 mm greater than the thickness of the edge of the solar panel to ensure stable adhesion between the solar panel and the frame 200.

[0061] In one feasible embodiment, the clamping plate 250 is provided with a glue groove 2502, which can accommodate excess sealant to prevent the sealant from overflowing from the positioning groove 2501. Specifically, the clamping plate 250 includes a support portion 251 connected to the frame upper plate 220 and a parallel portion 252 connected to the support portion 251. The support portion 251 overlaps with the frame outer plate 230, and the parallel portion 252 is parallel to the frame upper plate 220. The parallel portion 252 is provided with the glue groove 2502.

[0062] Exemplarily, the width B4 of the parallel portion 252 is 10 mm to 12 mm.

[0063] Exemplarily, the distance B5 between the parallel portion 252 and the frame lower plate 240 is 30 mm to 40 mm.

[0064] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A frame structure, characterized in that, The invention comprises a frame (200), wherein the frame (200) comprises a cavity (201), a boss portion (211) is arranged on the frame (200), the boss portion (211) comprises an inner concave surface (2111) recessed outside the cavity (201) and an outer convex surface (2112) convexly arranged inside the cavity (201), and a disassembly hole (212) penetrating the inner concave surface (2111) and the outer convex surface (2112) is opened on the boss portion (211), and the disassembly hole (212) is used for allowing a disassembly tool to pass through the cavity (201).

2. The border structure according to claim 1, characterized in that The frame (200) comprises a frame inner plate (210), a frame upper plate (220), a frame outer plate (230) and a frame lower plate (240) which are connected in sequence; the frame inner plate (210), the frame upper plate (220), the frame outer plate (230) and the frame lower plate (240) enclose a cavity (201); and a boss portion (211) is provided on the frame inner plate (210).

3. The border structure according to claim 2, wherein A first boss (213) is protrudingly provided in the middle area of one side of the frame inner plate (210) facing the frame outer plate (230), and / or a second boss (231) is protrudingly provided in the middle area of one side of the frame outer plate (230) facing the frame inner plate (210).

4. The border structure according to claim 2, characterized in that, The frame upper plate (220) is provided with a clamping plate (250) on the side facing away from the frame lower plate (240), a positioning groove (2501) is formed between the clamping plate (250) and the frame upper plate (220), the opening of the positioning groove (2501) is located on one side of the frame inner plate (210), and a glue containing groove (2502) is provided on the clamping plate (250).

5. The border structure according to any one of claims 1-4, characterized in that, The invention also comprises an angle code (100), wherein the angle code (100) comprises two connecting arms (110) arranged at an angle, wherein a clamping groove (111) is provided on the inner edge of the connecting arm (110), wherein the connecting arm (110) is inserted into the mold cavity (201), and the boss portion (211) is clamped with the clamping groove (111); wherein a clearance space is formed between the boss portion (211) and the groove wall of the clamping groove (111), and the disassembly hole (212) is used for allowing a disassembly tool to pass through the clearance space.

6. The border structure according to claim 5, characterized in that, The end of the connecting arm (110) comprises a first end face (112) and a second end face (113) which are arranged at an angle, wherein the first end face (112) is connected to the inner edge of the connecting arm (110) and is inclined toward the outer edge of the connecting arm (110), and the second end face (113) is connected to the outer edge of the connecting arm (110) and is inclined toward the inner edge of the connecting arm (110).

7. The border structure according to claim 5, characterized in that, The end of the connecting arm (110) comprises a first end surface (112), and the first end surface (112) is connected to a groove side wall (1111) of the clamping groove (111).

8. The border structure according to claim 5, characterized in that, The card slot (111) comprises two oppositely arranged slot side walls (1111), and the slot side walls (1111) are arranged to be inclined outwards from the slot bottom to the opening end of the card slot (111).

9. The border structure according to claim 5, wherein An ear projection (115) is formed by extending a groove side wall (1111) on a side of the card slot (111) away from an end of the connecting arm (110).

10. The border structure according to claim 9, characterized in that, A distance H3 between the ear projection (115) and an outer edge of the connecting arm (110) is greater than a height H2 of the cavity (201).

11. The border structure according to claim 5, wherein, A corner portion receiving groove (117) is defined between inner edges of the two connecting arms (110) of the corner fitting (100).

12. The border structure according to claim 5, characterized in that, At least one chip receiving groove (118) is defined in an outer edge of each of the two connecting arms (110).

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