CN219876739U - Shielding cover convenient to assemble and disassemble - Google Patents
Shielding cover convenient to assemble and disassemble Download PDFInfo
- Publication number
- CN219876739U CN219876739U CN202320566285.XU CN202320566285U CN219876739U CN 219876739 U CN219876739 U CN 219876739U CN 202320566285 U CN202320566285 U CN 202320566285U CN 219876739 U CN219876739 U CN 219876739U
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- China
- Prior art keywords
- shielding
- fastening sleeve
- insulating fastening
- shielding cover
- length
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- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000002788 crimping Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model discloses a conveniently-disassembled shielding cover which is applied to a shielding device of a PCB main board and comprises an insulating fastening sleeve and a shielding cover, wherein a cavity at the bottom of the insulating fastening sleeve is used for fastening the shielding device, the shielding cover is fastened outside the insulating fastening sleeve, a gap is reserved between the top end of the insulating fastening sleeve and the shielding cover, and a locking screw penetrates through the top of the shielding cover and then is connected with the insulating fastening sleeve so as to lock the insulating fastening sleeve and the shielding cover. The insulating fastening sleeve disclosed by the utility model is used for fastening the shielding device by utilizing the interference fit principle, the shielding cover is fastened outside the insulating fastening sleeve to shield signals of the shielding device, the size of the shielding cover is slightly larger than that of the shielding device, the shielding target of the shielding cover is accurate, the occupied area on the PCB main board is smaller, the insulating fastening sleeve and the shielding cover are locked by the locking screw, the locking screw can adjust the crimping force between the shielding cover and the PCB main board, and the insulating fastening sleeve is convenient to install and reliable in mechanical property.
Description
Technical Field
The utility model relates to the technical field of shielding cases, in particular to a shielding case convenient to assemble and disassemble.
Background
Electromagnetic compatibility EMC (Electromagnetic Compatibility) means that an electronic device does not interfere with or be affected by other devices; the disturbance of the electronic component to the outside is called EMI (Electromagnetic Interference); electromagnetic waves interact with electronic components to produce a disturbed phenomenon called EMS (Electromagnetic Susceptibility)
As smart devices begin to enter the public field of view, smart devices have become popular products, and the smart devices have certain requirements on the environmental requirements of voice, but it is known that these products can generate more or less radio frequency radiation, which can affect the normal operation of peripheral electronic products and internal components, and in order to prevent mutual electromagnetic influence between the internal components, manufacturers often use shielding cases to shield important components.
The shield case has a function of attenuating interference because it functions to absorb energy (eddy current loss), reflect energy (interfacial reflection of electromagnetic waves on the shield body), and cancel energy (electromagnetic induction generates a reverse electromagnetic field on the shield layer, which can cancel part of the interfering electromagnetic waves) both of the interfering electromagnetic waves from outside such as wires, cables, components, circuits or systems, and the like.
The current shielding cases are mostly used for shielding PCB board level or regional circuit modules and certain large areas. The shielding cover is large in size and mass, the occupied area of the PCB is relatively large, the connection mode is generally fixed by adopting manual welding, professional clamp clamping or multi-point buckling fixing modes, and the like, and the problems of more fixed points and complex disassembly and assembly processes exist.
Disclosure of Invention
In order to solve the problems of large occupied area and complex connection of the shielding cover on the PCB in the prior art, the utility model provides the shielding cover which is convenient to assemble and disassemble.
The technical scheme of the utility model is as follows:
a shielding cover convenient to assemble and disassemble is applied to a shielding device of a PCB main board, and is characterized in that,
the shielding device is fastened in a cavity at the bottom of the insulating fastening sleeve, the shielding cover is fastened outside the insulating fastening sleeve, a gap is reserved between the top end of the insulating fastening sleeve and the shielding cover, and a locking screw penetrates through the top of the shielding cover and then is connected with the insulating fastening sleeve so as to lock the insulating fastening sleeve and the shielding cover.
The utility model according to the above-mentioned aspect is characterized in that the length of the cavity at the bottom of the insulating fastening sleeve is smaller than the length of the shielding device, and the width of the cavity at the bottom of the insulating fastening sleeve is smaller than the width of the shielding device.
The utility model according to the above scheme is characterized in that the difference between the length of the cavity at the bottom of the insulating fastening sleeve and the length of the shielding device, and the difference between the width of the cavity at the bottom of the insulating fastening sleeve and the width of the shielding device are all 0.2-0.3mm.
Further, the thickness of the upper part of the cavity of the insulating fastening sleeve is M, and the value of M is larger than the length of the locking screw.
Further, the length of the outer side wall of the insulating fastening sleeve is larger than the length of the shielding device, the width of the outer side wall of the insulating fastening sleeve is larger than the width of the shielding device, and the difference between the length of the outer side wall of the insulating fastening sleeve and the length of the shielding device and the difference between the width of the outer side wall of the insulating fastening sleeve and the width of the shielding device are 3-4mm.
Further, the shielding cover is made of metal.
Further, the locking screw and the shielding cover are tightly pressed through an elastic disc spring.
Further, a groove for allowing the locking screw to pass through is formed in the top end of the insulating fastening sleeve, and a nut is embedded in the groove at the top end of the insulating fastening sleeve.
The utility model according to the above-mentioned aspect is characterized in that the shield case is provided with through holes for passing the locking screws at corresponding positions of the grooves.
The utility model according to the above scheme is characterized in that the groove is provided with threads which are matched with the locking screw.
The utility model according to the scheme is characterized in that the elastic disc spring is a GB/T1972-2005B type disc spring, and the locking screw is a national standard M3 type screw.
According to the scheme, the insulating fastening sleeve has the beneficial effects that the shielding device is fastened by utilizing the interference fit principle, the shielding cover is fastened outside the insulating fastening sleeve to shield signals of the shielding device, the size of the shielding cover is slightly larger than that of the shielding device, the shielding object of the shielding cover is accurate, the occupied area on a PCB main board is small, the insulating fastening sleeve and the shielding cover are locked by the locking screw, the crimping force between the shielding cover and the PCB main board can be adjusted by the locking screw, the installation is convenient, and the mechanical property is reliable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of an explosive structure according to the present utility model;
FIG. 3 is a schematic view of an explosion structure from another perspective of the present utility model;
FIG. 4 is a cross-sectional view of the present utility model;
fig. 5 is a top view of the present utility model.
In the drawings, the respective reference numerals are as follows:
1. a PCB motherboard; 2. a shielding device; 3. an insulating fastening sleeve; 31. a cavity; 4. a shield; 41. a gap; 5. a nut; 6. an elastic disc spring; 7. locking screws.
Description of the embodiments
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments.
It should be noted that the terms "comprising" and "having" and any variations thereof in the description and claims of the present utility model are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The term "disposed" and like terms are to be broadly interpreted, and may be fixedly connected, detachably connected, or integrally formed, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "bottom", etc. are directions or positions based on those shown in the drawings, and are merely for convenience of description, and are not to be construed as limiting the present technical solution.
As shown in fig. 1-5, a shielding cover convenient to disassemble and assemble is applied to a shielding device of a PCB main board 1 to perform independent electromagnetic shielding on a certain shielding device 2, and when the PCB main board 1 is required to be designed, a surface layer on one side of the shielding device 2 is subjected to exposed network copper sheet treatment according to the vertical projection size of the shielding cover 4 so as to enable the shielding cover 4 to be grounded. The customized shielding cover convenient to assemble and disassemble comprises an insulation fastening sleeve 3 and a shielding cover 4, a cavity 31 at the bottom of the insulation fastening sleeve 3 is used for fastening the shielding device 2, the shielding cover 4 is fastened outside the insulation fastening sleeve 3, a gap 41 is reserved between the top end of the insulation fastening sleeve 3 and the shielding cover 4, the design purpose is that a space for movement is generated when a pressing fixing device formed by a locking screw 7 and an elastic disc spring 6 moves downwards to apply force to the shielding cover 4, and meanwhile, the space is reserved for deformation required by downward pressing and self micro deformation after the shielding cover 4 is stressed. The nut 5 is embedded at the top of insulating fastening cover 3, and locking screw 7 passes behind the top of shield cover 4 and is connected with insulating fastening cover 3 to locking insulating fastening cover 3 and shield cover 4, locking screw 7 can adjust the crimping dynamics of shield cover 4 and PCB mainboard 1.
The insulating fastening sleeve disclosed by the utility model is used for fastening the shielding device by utilizing the interference fit principle, the shielding cover is fastened outside the insulating fastening sleeve to shield signals of the shielding device, the size of the shielding cover is slightly larger than that of the shielding device, the shielding target of the shielding cover is accurate, the occupied area on the PCB main board is smaller, the insulating fastening sleeve and the shielding cover are locked by the locking screw, the locking screw can adjust the crimping force between the shielding cover and the PCB main board, and the insulating fastening sleeve is convenient to install and reliable in mechanical property.
In a preferred embodiment the length of the cavity 31 in the bottom of the insulating fastening sleeve 3 is smaller than the length of the shielding device 2 and the width of the cavity 31 in the bottom of the insulating fastening sleeve 3 is smaller than the width of the shielding device 2. The difference between the length of the cavity 31 at the bottom of the insulating fastening sleeve 3 and the length of the shielding device 2, and the difference between the width of the cavity 31 at the bottom of the insulating fastening sleeve 3 and the width of the shielding device 2 are all 0.2-0.3mm, the insulating fastening sleeve 3 and the shielding device 2 need to be tightly matched, the interference fit is utilized to prevent the connection from falling off, and the purpose of the arrangement is to fasten the shielding cover 4 by means of the friction force of the interference fit between the cavity 31 at the bottom and the shielding device 2 and the downward pressure of the locking screw 7.
In a preferred embodiment, the thickness M above the cavity 31 of the insulating fastening sleeve 3 is greater than the length of the locking screw. The purpose of the arrangement is to leave a certain thickness for the insertion of the nut 5 or for tapping from the top of the insulating fastening sleeve 3 (which can be integrated into one piece during injection moulding in a large batch) to accommodate the locking screw 7 for locking and securing, preventing damage to the shielding device 2. In this embodiment, the value of M is greater than 8mm, and 8mm is only the wall thickness of the upper cavity of the fastening sleeve given about by referring to the length of the cross slot pan head screw on GB/T808, so as to ensure the fastening effect of the fastening sleeve and the shielding case, and only needs to reduce the thickness above the cavity as much as possible on the premise.
In a preferred embodiment, the length of the outer side wall of the insulating fastening sleeve 3 is greater than the length of the shielding device 2, and the width of the outer side wall of the insulating fastening sleeve 3 is greater than the width of the shielding device 2. The difference between the length of the outer side wall of the insulating fastening sleeve 3 and the length of the shielding device 2, and the difference between the width of the outer side wall of the insulating fastening sleeve 3 and the width of the shielding device 2 are 3-4mm, and the purpose of the insulating fastening sleeve is to insulate the shielding device 2.
In the preferred embodiment, the length of the inner side wall of the shielding case 4 is greater than the length of the outer side wall of the insulating fastening sleeve 3, and the width of the inner side wall of the shielding case 4 is greater than the width of the inner side wall of the insulating fastening sleeve 3, so that the length and width of the shielding case 4 are slightly greater than the length and width of the insulating fastening sleeve 3 for installation.
In a preferred embodiment, the shield 4 is of metal. In alternative embodiments, the shield 4 is a copper-clad sheet metal process shield, and in other alternative embodiments, the shield 4 is an aluminum alloy milling cavity process shield.
In an alternative embodiment, the locking screw 7 is pressed or locked against the shielding case 4 by means of an elastic disc spring 6.
In the preferred embodiment, the elastic disc spring 6 is a GB/T1972-2005B type disc spring, plays a role in elastic locking in the system and has a certain anti-loosening effect, and the specific parameters of the elastic disc spring 6 are as follows: the outer diameter (D) was 8mm, the inner diameter (D) was 4.2mm, the edge thickness (t) was 0.3mm, and the free height (H) was 0.55mm. The locking screw 7 is a national standard M3 type screw, and plays a role in fixing the whole shielding cover 4.
In this embodiment, the SPM10054T type inductor in the conventional design is taken as an example, and the inductor is 10.7mm long, 10mm wide and 5.4mm high, and is the shielding device 2 (the shielding device 2 can cover more electronic devices that need electromagnetic shielding and have a size that meets the production and installation requirements of the system).
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the utility model is not limited by the above manner, and it is within the scope of the utility model to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted, or without any improvement.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320566285.XU CN219876739U (en) | 2023-03-16 | 2023-03-16 | Shielding cover convenient to assemble and disassemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320566285.XU CN219876739U (en) | 2023-03-16 | 2023-03-16 | Shielding cover convenient to assemble and disassemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219876739U true CN219876739U (en) | 2023-10-20 |
Family
ID=88347843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320566285.XU Active CN219876739U (en) | 2023-03-16 | 2023-03-16 | Shielding cover convenient to assemble and disassemble |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219876739U (en) |
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2023
- 2023-03-16 CN CN202320566285.XU patent/CN219876739U/en active Active
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