Shielding cover easy to weld

Abstract

A shielding cover easy to weld comprises a shielding body and a separation frame connected or fixed to the shielding body, the shielding body comprises a covering top face and a side edge formed by bending downwards from the periphery of the covering top face, and the free end of the side edge is bent outwards to form a flanging. The separation frame comprises a supporting wall for supporting the covering top face and a welding part formed by bending the tail end of the supporting wall, and a welding face is formed on the bottom face of the welding part. The problem of poor welding of the low-density metal and the printed circuit board can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic shielding, in particular to a shielding cover which is easy to weld. Background Art

[0002] Electromagnetic shielding is used to shield certain electronic components in electronic equipment to prevent the electronic components from interfering with other external devices or to protect the electronic components from external electromagnetic interference.

[0003] Due to the large number of electronic components on the PCB board in the electronic equipment, the number of electronic components that need to be shielded is not unique. Usually, multiple shielding parts are required to achieve the overall shielding effect. However, due to the limited use space, sometimes multiple electronic components that do not interfere with each other are shielded in one shielding cover. However, sometimes the number of shielding elements is too large, resulting in an excessively large area of ​​the shielding cover, and it is necessary to divide a shielding cover into multiple spaces, so that the interference between the shielded electronic components can be minimized. Traditional shielding covers of this type, such as the patent application No. 201420284839.8 of the People's Republic of China, disclose a shielding cover divided into multiple shielding units, which is achieved by setting a shielding frame and a shielding cover. The top surface of the shielding frame is torn and bent to form a partition bar to divide the shielding area into multiple shielding units. The partition bar is welded to the PCB and plays the role of separation, support, and strength enhancement. However, this technical solution has more components, which can facilitate maintenance, but the cost increases accordingly. Traditional shielding covers generally use nickel silver with a higher density as a material.

[0004] However, the demand for electronic equipment to reduce weight requires the use of aluminum alloy materials with lower density to manufacture shielding covers. However, an oxide film is easily formed on the surface of aluminum alloy, which makes welding difficult. The aluminum alloy sheet needs to be tinned first, and then punched and cut to form a shielding cover. However, the end surface formed by tearing to form a partition bar is not tinned, and welding is still difficult. In view of this, it is necessary to propose a solution to solve the above technical problems. Utility Model Content

[0005] In view of this, it is necessary to provide a shielding cover which has a separation function and is easy to weld.

[0006] In order to solve the above-mentioned technical problems, the present application provides a shielding cover that is easy to weld, including a shielding body and a partition frame connected or fixed to the shielding body, the shielding body includes a covering top surface, a side edge formed by bending downward from the periphery of the covering top surface, the free end of the side edge is bent outward to form a flange, the partition frame includes a supporting wall supporting the covering top surface and a welding portion formed by bending from the end of the supporting wall, and the bottom surface of the welding portion forms a welding surface.

[0007] Preferably, the shielding cover is formed by stamping an aluminum alloy plate, and before the stamping, a nickel plating layer is formed on the surface of the aluminum alloy plate by electroplating.

[0008] Preferably, the end of the side edge of the shielding body is bent to form a flange, so that the side surface of the side edge portion faces downward as a welding surface, the cut fracture surface of the side edge faces one lateral side, and the cut fracture surface has no nickel plating.

[0009] Preferably, the welding portion formed by bending the end of the supporting wall of the partition frame makes the side surface of the supporting wall part face downward to form a welding surface, while the cutting surface formed by stamping faces the lateral side.

[0010] Preferably, the welding surface of the welding portion retains the nickel plating layer, and the cutting surface has no nickel plating layer.

[0011] Preferably, the partition frame further comprises a connection portion attached to the bottom side of the covering top surface, the connection portion is fixed to the bottom side of the covering top surface by spot welding, and the support wall is formed by bending and extending downward from one side of the connection portion.

[0012] Preferably, positioning holes are provided at corresponding positions of the connecting portion and the covering top surface, and the connecting portion is welded after being fixed in position by the positioning holes.

[0013] Preferably, the welding surface is flush with the bottom surface of the flange, and the partition frame divides the shielding area into a plurality of shielding units.

[0014] Preferably, the covering top surface is partially cut off, and the shielding cover further comprises a shielding cover covering the cut-off area of ​​the covering top surface.

[0015] Preferably, the partition frame is formed by tearing the covering top surface and bending and extending downward, and the supporting wall of the partition frame is formed by bending and extending downward from the covering top surface, and the partition frame divides the shielding area into a plurality of shielding units.

[0016] The shielding cover of the present application is made of low-density metal such as aluminum alloy, and then a welding portion is formed by bending the bottom end of the partition frame so that the stamped fracture surface of the welding portion faces laterally outward, and part of the side surface of the partition frame faces the printed circuit board as a welding surface, thereby avoiding the problem of poor welding due to the lack of nickel plating on the fracture surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0018] Figure 1 A three-dimensional diagram of a shielding cover that is easy to weld for this application;

[0019] Figure 2 A three-dimensional diagram of a separator of a shielding cover that is easy to weld in the present application;

[0020] Figure 3 For along Figure 1 A cross-sectional view taken along the dashed line AA shown;

[0021] Figure 4 for Figure 3 A partial enlarged view of the dotted circle shown.

[0022] Description of Reference Numerals

[0023] Shielding body-10; covering top surface-11; side edge-12; flange-13; first shielding unit-S1; second shielding unit-S2; positioning hole-14; partition frame-20; connecting part-21; supporting wall-22; welding part-23; welding surface-24; positioning hole-25; cutting surface-26. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0025] Embodiment 1

[0026] For this example, please refer to Figures 1 to 4 As shown, the shielding cover that is easy to weld in the first embodiment includes a shielding body 10 and a partition frame 20 connected to the shielding body 10 and supporting the shielding body 10 .

[0027] The shielding body 10 includes a flat top surface 11, a side 12 formed by bending downward and extending from the outer periphery of the top surface 11, and a flange 13 formed by folding outward from the bottom end of the side 12. The flange 13 is based on the principle that the side surface of the side 12 becomes the bottom surface of the flange 13, and the bottom surface of the flange 13 is used as a welding surface to be welded with a printed circuit board (not shown). That is, before the end edge of the side 12 is flanged, the bottom surface of the side 12 is a cutting surface, and the cutting surface is not suitable as a welding surface with a printed circuit board, so that the welding contact surface is changed by bending the end edge of the side 12 to form the flange 13, so that the welding contact surface is changed and the area of ​​the welding contact surface is appropriately increased, thereby avoiding the situation where the material is too thin and causes unstable welding.

[0028] The partition frame 20 includes a connecting portion 21 attached to and fixedly connected to the lower side of the covering top surface 11, a supporting wall 22 bent downward and extended from the connecting portion 21, a welding portion 23 bent from the lower edge of the supporting wall 22, and a welding surface 24 formed on the bottom side of the welding portion 23. Before the lower end of the supporting wall 22 is bent to form the welding portion 23, the welding surface 24 serves as a part of the side surface of the supporting wall 22, and the cutting surface 26 on the lower side of the supporting wall 22 no longer faces the printed circuit board. The width of the welding surface 24 is much smaller than the width of the connecting portion 21. Overall, the partition frame 20 is in a Z-shaped structure. Positioning holes 14 and 25 are respectively provided at the joint of the connecting portion 21 and the covering top surface 11 where it is attached. The positioning holes 14 and 25 can be used for positioning when fixing the partition frame 20 to the shielding body 10, and the positioning holes 14 and 25 can also be used as vents.

[0029] In this embodiment, the partition frame 20 is formed by spot welding the connection portion 21 to the lower side of the covering top surface 11 , and the width of the connection portion 21 can support the covering top surface 11 in a more balanced manner.

[0030] The welding surface 24 does not extend downward beyond the bottom surface of the flange 13 . Preferably, the welding surface 24 is flush with the bottom surface of the flange 13 .

[0031] The shielding cover of the present embodiment is made of aluminum alloy material. The aluminum alloy plate needs to be electroplated with nickel first to form a nickel plating layer on the surface of the metal plate. Then, the aluminum alloy plate is stamped to form the shielding body 10 and the partition frame 20. The shielding body 10 and the partition frame 20 can be stamped separately from different aluminum alloy plates.

[0032] The cut surface formed after stamping of the aluminum alloy sheet no longer has the nickel coating, and if the cut surface is used as a welding surface, the welding will be unstable due to the oxide layer on the surface of the aluminum alloy when soldering. This is why the cut surface 26 is not used as a welding surface.

[0033] After the partition frame 20 is fixed on the shielding body 10, the shielding space is divided into a first shielding unit S1 and a second shielding unit S2 to shield different electronic components. A plurality of partition frames 20 can be provided in the area to be separated depending on the number and layout of the electronic components to be shielded.

[0034] Embodiment 2

[0035] For example, in the patent application No. 201420284839.8 of the People's Republic of China, some shielding covers adopt a split structure, that is, a shielding body 10 is provided, the covering top surface 11 of the shielding body 10 is cut off, and a shielding cover (not shown) is added and combined with the shielding body 10 to serve as the covering top surface, so that the shielding cover can be easily removed for maintenance. At this time, the partition frame 20 is directly formed by tearing the covering top surface 11 of the shielding body 10 and bending downward to extend. That is, the connecting portion 21 is no longer needed, but directly forms an integral structure with a part of the covering top surface 11. The rest is consistent with the first embodiment.

[0036] The shielding cover of the present application is made of low-density metal such as aluminum alloy, and then the welding portion 23 is formed by bending the bottom end of the partition frame 20, so that the stamped fracture surface of the welding portion 23 faces laterally outward, and part of the side surface of the partition frame 20 faces the printed circuit board as the welding surface 24, avoiding the problem of poor welding due to the lack of nickel plating on the fracture surface.

[0037] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0038] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A shielding cover that is easy to weld, comprising a shielding body and a partition frame connected or fixed to the shielding body, wherein the shielding body comprises a covering top surface and a side edge bent downward from the periphery of the covering top surface, characterized in that: The free end of the side edge is bent outward to form a flange, and the partition frame includes a support wall supporting the covering top surface and a welding portion formed by bending from the end of the support wall, and the bottom surface of the welding portion forms a welding surface.

2. The easily weldable shielding cover according to claim 1, characterized in that: The shielding cover is made by stamping an aluminum alloy plate. Before the stamping, a nickel plating layer is formed on the surface of the aluminum alloy plate by electroplating.

3. The easily weldable shielding cover according to claim 2, characterized in that: The end of the side edge of the shielding body is bent to form a flange, so that the side surface of the side edge portion faces downward as a welding surface, the cut fracture surface of the side edge faces one lateral side, and the cut fracture surface has no nickel plating.

4. The easily weldable shielding cover according to claim 3, characterized in that: The welding portion formed by bending the end of the supporting wall of the partition frame makes the side surface of the supporting wall part face downward to form a welding surface, while the cutting surface formed by stamping faces the lateral side.

5. The easily weldable shielding cover according to claim 4, characterized in that: The welding surface of the welding part retains the nickel plating layer, and the cutting surface has no nickel plating layer.

6. The easily weldable shielding cover according to claim 4, characterized in that: The partition frame also includes a connecting portion attached to the bottom side of the covering top surface, the connecting portion is fixed to the bottom side of the covering top surface by spot welding, and the supporting wall is formed by bending and extending downward from one side of the connecting portion.

7. The easily weldable shielding cover according to claim 6, characterized in that: Positioning holes are provided at the corresponding positions of the connecting portion and the covering top surface, and the connecting portion is welded after being fixed in a position determined by the positioning holes.

8. The easily weldable shielding cover according to claim 7, characterized in that: The welding surface is flush with the bottom surface of the flange, and the partition frame divides the shielding area into a plurality of shielding units.

9. The easily weldable shielding cover according to claim 4, characterized in that: The covering top surface is partially cut away, and the shielding cover further comprises a shielding cover covering the cut away area of ​​the covering top surface.

10. The easily solderable shielding cover according to claim 9, characterized in that: The partition frame is formed by tearing the covering top surface and bending and extending downwards, and the supporting wall of the partition frame is formed by bending and extending downwards from the covering top surface. The partition frame divides the shielding area into a plurality of shielding units.

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