Display board supporting device with aluminum alloy supporting piece

Abstract

The utility model provides a display board supporting device with an aluminum alloy supporting piece, relates to the technical field of supporting devices, and aims to solve the problem that an existing display board is very easy to fall off due to a fixing mode. The display board supporting device comprises an aluminum alloy supporting piece, a shielding fastener and a first screw, the aluminum alloy supporting piece comprises a supporting wall, a mounting wall and a fixing wall, the supporting wall and the mounting wall are spaced, the fixing wall is fixedly connected with the supporting wall and the mounting wall, the supporting wall, the fixing wall and the mounting wall are sequentially connected to form a groove body with a notch deviating from the wall surface, and the supporting wall is used for supporting a display board; the fixed wall is provided with a first through hole, and the first through hole is configured to enable a first screw to penetrate through and be fastened on a wall surface so as to connect the fixed wall with the wall surface; the shielding fastener is arranged in the groove body and used for shielding the first through hole. According to the utility model, the display board can be reliably supported, and the falling risk of the display board is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting devices, and in particular to a display board supporting device with an aluminum alloy supporting piece. Background Art

[0002] KT board is a new type of material made of polystyrene particles that are foamed to form a core, and then coated and pressed on the surface. KT board has the characteristics of being straight, light, not easy to deteriorate and easy to process. It is often used as a mounting lining board for exhibitions, displays and notices for product promotion information release.

[0003] However, when the KT board is used as a display board, it is often only adhered to the wall by double-sided adhesive or other adhesives. When the wall is damp or subjected to strong vibration, it is very easy to fall off. Utility Model Content

[0004] The utility model aims to provide a display board supporting device with an aluminum alloy supporting member (hereinafter referred to as the display board supporting device) to solve the technical problem that the existing display board fixing method makes it very easy to fall off.

[0005] The utility model provides a display board support device, comprising an aluminum alloy support, a shielding fastener and a first screw, wherein the aluminum alloy support comprises a support wall and a mounting wall spaced apart from each other, and a fixed wall fixedly connecting the support wall and the mounting wall, the support wall, the fixed wall and the mounting wall are sequentially connected to form a groove body with a notch facing away from a wall surface, and the support wall is used to support the display board; the fixed wall is provided with a first through hole, and the first through hole is configured to allow the first screw to pass through and be fastened to the wall surface to connect the fixed wall and the wall surface; the shielding fastener is arranged in the groove body, and is used to shield the first through hole.

[0006] Furthermore, the fixed wall extends laterally toward the trough body to form an extension wall, and a right-angle space for accommodating the display board is formed between the extension wall and the supporting wall; the extension wall is provided with a second through hole, and the display board supporting device also includes a second screw, and the second through hole is configured to allow the second screw to pass through and be fastened to the wall surface to connect the extension wall and the wall surface.

[0007] Furthermore, both the first through hole and the second through hole are countersunk holes.

[0008] Further, the number of the first through holes is multiple, and the multiple first through holes are arranged at intervals along the length direction of the aluminum alloy support; and / or the number of the second through holes is multiple, and the multiple second through holes are arranged at intervals along the length direction of the aluminum alloy support.

[0009] Furthermore, the shielding fastener is slidably connected to the aluminum alloy support, and the sliding direction of the shielding fastener is parallel to the length direction of the aluminum alloy support.

[0010] Furthermore, the mounting wall is vertically connected with a sliding wall, the sliding wall extends to the interior of the slot body, the sliding wall has a first sliding groove facing the fixed wall and a second sliding groove away from the fixed wall, the first sliding groove and the second sliding groove both extend along the length direction of the aluminum alloy support; the shielding fastener includes a shielding body, a first positioning wall and a second positioning wall, wherein the first positioning wall is slidably matched with the first sliding groove; the second positioning wall is slidably matched with the second sliding groove; the shielding body is used to shield the first through hole.

[0011] Furthermore, the shielding body is an arc wall with a C-shaped cross section, one end of the arc wall is bent toward the center thereof to form the first positioning wall, and the other end of the arc wall is bent toward the center thereof to form the second positioning wall.

[0012] Further, the first positioning wall and the first sliding groove are clearance-matched, and the second positioning wall and the second sliding groove are clearance-matched.

[0013] Furthermore, the thickness of the first positioning wall is 1-1.5 mm smaller than the width of the first sliding groove, and the thickness of the second positioning wall is 1-1.5 mm smaller than the width of the second sliding groove.

[0014] Furthermore, the shielding fastener is made of aluminum alloy.

[0015] The beneficial effects brought by the display board support device of the utility model are:

[0016] By setting a display board support device mainly composed of an aluminum alloy support, a shielding fastener and a first screw, when the display board needs to be fixed to the wall for display function, the above-mentioned display board support device can be first fixed to the wall, and the display board support device can be used to support the display board. Specifically, the fixed wall of the aluminum alloy support can be fitted with the wall, and the first screw can pass through the first through hole of the fixed wall and be fastened to the wall to achieve a fixed connection between the fixed wall and the wall, thereby achieving the purpose of fixing the aluminum alloy support to the wall. After the aluminum alloy support is fixed to the wall, the support wall of the aluminum alloy support is located above its mounting wall, and a groove is formed between the support wall and the mounting wall. Afterwards, the shielding fastener is set in the above-mentioned groove to shield the first through hole. After the above-mentioned display board support device is installed on the wall, the display board can be supported on the support wall of the aluminum alloy support, wherein the part where the display board contacts the wall can be fixed by a small amount of double-sided tape or glue.

[0017] The display board support device can provide reliable support for the display board, so that the shear force on the adhesive structure (double-sided tape or glue) between the display board and the wall completely disappears, and the display board and the wall are not subjected to force in the vertical direction, so that the display board can be firmly fixed to the wall.

[0018] In addition, by providing a shielding fastener, the first through hole and the first screw provided in the first through hole can be shielded. On the one hand, it prevents foreign matter from entering the position of the first through hole, and plays a certain protective role on the connection structure at the first through hole. On the other hand, it can also ensure the neatness of the appearance of the display board support device, making the installed display board support device more beautiful and coordinated visually. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic cross-sectional view of a display board support device provided by an embodiment of the utility model (the cross section does not pass through the first through hole and the second through hole);

[0021] Figure 2 A schematic cross-sectional view of a display board supporting device provided by an embodiment of the utility model when supporting a display board (the cross section passes through the first through hole and the second through hole, and the first screw and the second screw are not shown).

[0022] Description of reference numerals:

[0023] 010-wall; 020-display board;

[0024] 100-aluminum alloy support; 200-shielding fastener;

[0025] 110-support wall; 120-installation wall; 130-fixed wall; 131-first through hole; 140-groove body; 150-extension wall; 151-second through hole; 160-sliding wall; 161-first slide groove; 162-second slide groove; 210-first positioning wall; 220-second positioning wall; 230-shielding body. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Figure 1 A schematic cross-sectional view of the display board support device provided in this embodiment (the cross section does not pass through the first through hole 131 and the second through hole 151), Figure 2 A schematic cross-sectional view of the display board support device provided in this embodiment when supporting the display board 020 (the cross section passes through the first through hole 131 and the second through hole 151, and the first screw and the second screw are not shown). Figure 1 and Figure 2 As shown, this embodiment provides a display board supporting device, including an aluminum alloy support member 100, a shielding fastener 200 and a first screw (not shown in the figure). Specifically, the aluminum alloy support member 100 includes a support wall 110 and a mounting wall 120 spaced apart from each other, and a fixed wall 130 fixedly connecting the support wall 110 and the mounting wall 120. The support wall 110, the fixed wall 130 and the mounting wall 120 are connected in sequence to form a groove body 140 with a groove facing away from the wall surface 010. The support wall 110 is used to support the display board 020; the fixed wall 130 is provided with a first through hole 131, and the first through hole 131 is configured to allow a first screw to pass through and be fastened to the wall surface 010 to connect the fixed wall 130 and the wall surface 010; the shielding fastener 200 is arranged in the groove body 140 to shield the first through hole 131.

[0028] When it is necessary to fix the display board 020 to the wall 010 for display function, the display board support device can be first fixed to the wall 010, and the display board support device can be used to support the display board 020. Specifically, the fixed wall 130 of the aluminum alloy support 100 can be fitted with the wall 010, and the first screw can pass through the first through hole 131 of the fixed wall 130 and be fastened to the wall 010, so as to achieve the fixed connection between the fixed wall 130 and the wall 010, thereby achieving the purpose of fixing the aluminum alloy support 100 to the wall 010. After the aluminum alloy support 100 is fixed to the wall 010, the support wall 110 of the aluminum alloy support 100 is located above its mounting wall 120, and a groove 140 is formed between the support wall 110 and the mounting wall 120. Afterwards, the shielding fastener 200 is set in the above-mentioned groove 140 to shield the first through hole 131. After the display board support device is installed on the wall 010, the display board 020 can be supported on the support wall 110 of the aluminum alloy support member 100, wherein the contact portion between the display board 020 and the wall 010 can be fixed by a small amount of double-sided tape or glue.

[0029] The display board support device can provide reliable support for the display board 020, so that the shear force on the adhesive structure (double-sided tape or glue) between the display board 020 and the wall 010 completely disappears, and there is no force between the display board 020 and the wall 010 in the vertical direction, so that the display board 020 can be firmly fixed to the wall 010.

[0030] In addition, by providing the shielding fastener 200, it is also possible to shield the first through hole 131 and the first screw provided in the first through hole 131. On the one hand, it prevents foreign matter from entering the position of the first through hole 131, and plays a certain protective role on the connection structure at the first through hole 131. On the other hand, it can also ensure the neatness of the appearance of the display board support device, making the installed display board support device more beautiful and coordinated visually.

[0031] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the fixed wall 130 extends laterally toward the groove body 140 to form an extension wall 150, wherein a right-angle space for accommodating the display board 020 is formed between the extension wall 150 and the supporting wall 110; the extension wall 150 is provided with a second through hole 151, and the display board supporting device further includes a second screw (not shown in the figure), and the second through hole 151 is configured to allow the second screw to pass through and be fastened to the wall surface 010 to connect the extension wall 150 and the wall surface 010.

[0032] An extension wall 150 is formed by extending the fixed wall 130 upward for a certain distance, and a second through hole 151 is opened in the extension wall 150 so that a second screw can pass through the second through hole 151 to connect with the wall 010, thereby fixing the extension wall 150 to the wall 010, thereby increasing the distribution area and number of connection points between the aluminum alloy support 100 and the wall 010, thereby ensuring the reliability of the connection between the aluminum alloy support 100 and the wall 010.

[0033] It should be noted that, in this embodiment, when the display board 020 is supported on the supporting portion of the aluminum alloy supporting member 100 , the second through hole 151 can be blocked.

[0034] Please continue to refer to Figure 2 In this embodiment, both the first through hole 131 and the second through hole 151 can be countersunk holes.

[0035] By setting the first through hole 131 and the second through hole 151 as countersunk holes, after the first screw is screwed into the wall 010 through the first through hole 131, and after the second screw is screwed into the wall 010 through the second through hole 151, the first screw will not protrude from the first through hole 131, and the second screw will not protrude from the second through hole 151, so that the surfaces of the fixed wall 130 and the extension wall 150 facing away from the wall 010 remain flat, not only will it not cause interference with the shielding fastener 200, but it will also not cause scratches on the display board 020.

[0036] In this embodiment, there may be a plurality of first through holes 131 , and the plurality of first through holes 131 are arranged at intervals along the length direction of the aluminum alloy support member 100 .

[0037] By setting the number of the first through holes 131 to be multiple, and arranging the multiple first through holes 131 to be spaced apart along the length direction of the aluminum alloy support 100, on the one hand, the distribution area of ​​the first through holes 131 in the fixed wall 130 can be increased, so that after the fixed wall 130 is connected to the wall 010, the fixed wall 130 will not be partially warped, thereby ensuring the connection reliability between the fixed wall 130 and the wall 010. On the other hand, the number of connection points between the fixed wall 130 and the wall 010 can be increased, thereby avoiding the separation of the fixed wall 130 and the wall 010 due to a connection failure at a certain location, thereby further ensuring the connection reliability between the fixed wall 130 and the wall 010.

[0038] In this embodiment, the number of the second through holes 151 may also be multiple, and the multiple second through holes 151 are arranged at intervals along the length direction of the aluminum alloy support 100 .

[0039] By setting the number of the second through holes 151 to be multiple, and arranging the multiple second through holes 151 to be spaced apart along the length direction of the aluminum alloy support member 100, on the one hand, the distribution area of ​​the second through holes 151 in the extension wall 150 can be increased, so that after the extension wall 150 is connected to the wall 010, the extension wall 150 will not be partially warped, thereby ensuring the connection reliability between the extension wall 150 and the wall 010. On the other hand, the number of connection points between the extension wall 150 and the wall 010 can be increased, thereby avoiding the separation of the extension wall 150 and the wall 010 due to a connection failure at a certain location, thereby further ensuring the connection reliability between the extension wall 150 and the wall 010.

[0040] In this embodiment, the shielding fastener 200 is slidably connected to the aluminum alloy support 100 , wherein the sliding direction of the shielding fastener 200 is parallel to the length direction of the aluminum alloy support 100 .

[0041] This method of installing the shielding fastener 200 on the aluminum alloy support 100 can achieve rapid installation of the shielding fastener 200 on the aluminum alloy support 100, and the assembly efficiency is high.

[0042] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the mounting wall 120 is vertically connected with a sliding wall 160, and the sliding wall 160 extends to the interior of the slot body 140. The sliding wall 160 has a first slide groove 161 facing the fixed wall 130 and a second slide groove 162 away from the fixed wall 130. The first slide groove 161 and the second slide groove 162 both extend along the length direction of the aluminum alloy support 100; the shielding fastener 200 includes a shielding body 230, a first positioning wall 210 and a second positioning wall 220, wherein the first positioning wall 210 is slidably matched with the first slide groove 161; the second positioning wall 220 is slidably matched with the second slide groove 162; the shielding body 230 is used to shield the first through hole 131.

[0043] By respectively arranging a first slide groove 161 and a second slide groove 162 on opposite sides of the sliding wall 160, and arranging a first positioning wall 210 for slidingly cooperating with the first slide groove 161 and a second positioning wall 220 for slidingly cooperating with the second slide groove 162 on the shielding fastener 200, the shielding fastener 200 can be slidably connected to the sliding wall 160 at two different positions, which not only has a high connection reliability, but also makes it difficult for the shielding fastener 200 to separate from the aluminum alloy support 100 from the left and right directions.

[0044] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the shielding body 230 can be an arc wall with a C-shaped cross-section, wherein one end of the arc wall is bent toward its center to form a first positioning wall 210, and the other end of the arc wall is bent toward its center to form a second positioning wall 220.

[0045] This form of using the arc wall to form the shielding body 230 can not only greatly reduce the weight of the shielding fastener 200, but also facilitate the extrusion molding of the shielding fastener 200 and facilitate the processing and manufacturing of the shielding fastener 200. In addition, the shape structure of the arc wall also makes the shielding fastener 200 more beautiful and coordinated visually.

[0046] It should be noted that, in this embodiment, the “cross section” can be considered as the direction of the paper.

[0047] In this embodiment, the first positioning wall 210 and the first sliding groove 161 are clearance-matched, and the second positioning wall 220 and the second sliding groove 162 are clearance-matched.

[0048] By setting the first positioning wall 210 to be in a clearance fit with the first slide groove 161 and setting the second positioning wall 220 to be in a clearance fit with the second slide groove 162, the sliding smoothness of the shielding fastener 200 on the aluminum alloy support 100 can be ensured, thereby further improving the assembly efficiency of the shielding fastener 200.

[0049] In this embodiment, the thickness of the first positioning wall 210 is 1-1.5 mm smaller than the width of the first sliding groove 161 , and the thickness of the second positioning wall 220 is 1-1.5 mm smaller than the width of the second sliding groove 162 .

[0050] The above-mentioned size limitation can, on the one hand, avoid the situation where the sliding of the shielding fastener 200 on the aluminum alloy support 100 is obstructed due to the small difference between the thickness of the corresponding positioning wall and the width of the corresponding slide groove. On the other hand, it can also avoid the situation where the shielding fastener 200 shakes significantly after being installed on the aluminum alloy support 100 due to the large difference between the thickness of the corresponding positioning wall and the width of the corresponding slide groove.

[0051] It should be noted that in this embodiment, the thickness of the first positioning wall 210 is Figure 1 and Figure 2 The dimension in the vertical direction under the viewing angle; the width of the first slide groove 161 is the width of the first slide groove 161 in Figure 1 and Figure 2 The dimension in the vertical direction under the viewing angle; the thickness of the second positioning wall 220 is the second positioning wall 220 in Figure 1 and Figure 2 The width of the second slide groove 162 is the width of the second slide groove 162 in the vertical direction; Figure 1 and Figure 2 The dimension in the vertical direction under viewing angle.

[0052] It should also be noted that, in this embodiment, the limits on the range of values ​​include the end point values. That is, the thickness of the first positioning wall 210 can be 1 mm smaller than the width of the first chute 161, or 1.5 mm smaller than the width of the first chute 161, or any value between 1-1.5 mm smaller than the width of the first chute 161; similarly, the thickness of the second positioning wall 220 can be 1 mm smaller than the width of the second chute 162, or 1.5 mm smaller than the width of the second chute 162, or any value between 1-1.5 mm smaller than the width of the second chute 162.

[0053] In this embodiment, the material of the shielding fastener 200 can be aluminum alloy. This arrangement can greatly reduce the weight of the shielding fastener 200, thereby facilitating the lightweight design of the display board support device of this embodiment.

[0054] It should be noted that, in the present embodiment, the aluminum alloy support 100 and the shielding fastener 200 can be obtained by hot extrusion, and the material of both can be 6005 aluminum alloy. The specific extrusion process can be: the casting rod temperature is set to 470-490°C, the extrusion ratio of the selected extruder is greater than 40, the extrusion rod speed is 3-5mm / s, the outlet temperature is set to 520-540°C, and strong air cooling is performed after extrusion. Cut into a specified length, such as: 5000mm, and frame it for aging strengthening heat treatment at a temperature of 190°C and a duration of 2.5-4h. Among them, the flat mold used for extrusion is not the focus of this application and is not described in detail.

[0055] When the supported display board 020 is 1000 mm in length, the aluminum alloy support 100 and the shielding fastener 200 prepared above can be further cut into 1000 mm, and a first through hole 131 can be processed at a position 100 mm near the end and in the middle of the fixed wall 130 of the aluminum alloy support 100, and a second through hole 151 can be processed at a position 100 mm near the end and in the middle of the extending wall 150 of the aluminum alloy support 100, wherein the first through hole 131 and the second through hole 151 can be obtained by processing at a CNC (Computerized Numerical Control) machining center.

[0056] When the display board 020 needs to be supported, the aluminum alloy support member 100 can be fixed to the wall 010 using the first screw and the second screw, and the shielding fastener 200 can be slid into the groove 140 of the aluminum alloy support member 100; the bottom of the display board 020 is placed on the supporting wall 110 of the aluminum alloy support member 100, wherein the area where the display board 020 contacts the wall 010 is fixed with a small amount of double-sided tape, such as: only sticking double-sided tape on the four sides and diagonal areas of the display board 020 to make it bonded to the wall 010.

[0057] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

[0058] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0059] In the above embodiments, the descriptions of directions such as “upper”, “lower”, “left”, “right”, and “side” are all based on the drawings.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display board support device with an aluminum alloy support member, characterized in that: The invention comprises an aluminum alloy support member (100), a shielding fastener (200) and a first screw, wherein the aluminum alloy support member (100) comprises a support wall (110) and a mounting wall (120) spaced apart from each other, and a fixing wall (130) fixedly connecting the support wall (110) and the mounting wall (120), wherein the support wall (110), the fixing wall (130) and the mounting wall (120) are sequentially connected to form a notch facing away from the wall surface (010). A groove body (140), the supporting wall (110) is used to support a display board (020); the fixed wall (130) is provided with a first through hole (131), the first through hole (131) is configured to allow the first screw to pass through and be fastened to the wall surface (010), so as to connect the fixed wall (130) and the wall surface (010); the shielding fastener (200) is arranged on the groove body (140) and is used to shield the first through hole (131).

2. The display board support device according to claim 1, characterized in that: The fixed wall (130) extends laterally toward the groove body (140) to form an extension wall (150), and a right-angle space for accommodating the display board (020) is formed between the extension wall (150) and the support wall (110); the extension wall (150) is provided with a second through hole (151), and the display board supporting device further comprises a second screw, and the second through hole (151) is configured to allow the second screw to pass through and be fastened to the wall surface (010) so as to connect the extension wall (150) and the wall surface (010).

3. The display board support device according to claim 2, characterized in that: The first through hole (131) and the second through hole (151) are both countersunk holes.

4. The display board support device according to claim 2, characterized in that: The number of the first through holes (131) is multiple, and the multiple first through holes (131) are arranged at intervals along the length direction of the aluminum alloy support (100); and / or the number of the second through holes (151) is multiple, and the multiple second through holes (151) are arranged at intervals along the length direction of the aluminum alloy support (100).

5. The display board supporting device according to any one of claims 1 to 4, characterized in that: The shielding fastener (200) is slidably connected to the aluminum alloy support (100), and the sliding direction of the shielding fastener (200) is parallel to the length direction of the aluminum alloy support (100).

6. The display board supporting device according to claim 5, characterized in that: The mounting wall (120) is vertically connected with a sliding wall (160), the sliding wall (160) extends to the interior of the slot body (140), the sliding wall (160) has a first slide groove (161) facing the fixed wall (130) and a second slide groove (162) away from the fixed wall (130), the first slide groove (161) and the second slide groove (162) both extend along the length direction of the aluminum alloy support (100); the shielding fastener (200) comprises a shielding body (230), a first positioning wall (210) and a second positioning wall (220), wherein the first positioning wall (210) is slidably matched with the first slide groove (161); the second positioning wall (220) is slidably matched with the second slide groove (162); The shielding body (230) is used to shield the first through hole (131).

7. The display board supporting device according to claim 6, characterized in that: The shielding body (230) is an arc wall with a C-shaped cross section, one end of the arc wall is bent toward its center to form the first positioning wall (210), and the other end of the arc wall is bent toward its center to form the second positioning wall (220).

8. The display board supporting device according to claim 6, characterized in that: The first positioning wall (210) is clearance-matched with the first sliding groove (161), and the second positioning wall (220) is clearance-matched with the second sliding groove (162).

9. The display board supporting device according to claim 8, characterized in that: The thickness of the first positioning wall (210) is 1-1.5 mm smaller than the width of the first sliding groove (161), and the thickness of the second positioning wall (220) is 1-1.5 mm smaller than the width of the second sliding groove (162).

10. The display board supporting device according to any one of claims 1 to 4, characterized in that: The shielding fastener (200) is made of aluminum alloy.

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