CN212116087U - Electromagnetic shielding cover and electronic product - Google Patents
Electromagnetic shielding cover and electronic product Download PDFInfo
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- CN212116087U CN212116087U CN202020926519.3U CN202020926519U CN212116087U CN 212116087 U CN212116087 U CN 212116087U CN 202020926519 U CN202020926519 U CN 202020926519U CN 212116087 U CN212116087 U CN 212116087U
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- electromagnetic
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- shielding
- absorbing plate
- circuit board
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Abstract
The utility model belongs to the technical field of the electromagnetic shield, more specifically say, relate to an electromagnetic shield cover and electronic product. The electromagnetic shielding cover comprises an upper shell, a lower shell and a wave absorbing plate, wherein the upper shell and the lower shell are detachably connected and jointly enclose a shielding cavity for accommodating the circuit board, and the wave absorbing plate is installed in the shielding cavity and used for absorbing electromagnetic waves in the shielding cavity. The wave absorbing plate is arranged in the shielding cavity, and electromagnetic waves generated by electronic elements and modules such as chips and the like on the circuit board in the shielding cavity are projected onto the wave absorbing plate and absorbed by the wave absorbing plate, so that the energy of the electromagnetic waves in the shielding cavity can be further weakened on the basis that the upper shell and the lower shell isolate the electromagnetic waves, and the isolation effect of the shielding cover on the internal electromagnetic waves is improved; in addition, the electromagnetic wave entering the shielding cavity from the outside can be absorbed by the wave absorbing plate, so that the interference of the external electromagnetic wave can be reduced more effectively.
Description
Technical Field
The utility model belongs to the technical field of the electromagnetic shield, more specifically say, relate to an electromagnetic shield cover and electronic product.
Background
Generally, in electronic products, various electronic components are required to be arranged for executing different electrical actions, and along with the development demand of the market for diversification of functions of electronic products, the system structure of electronic equipment is increasingly complex, the size of components in the system is small, the layout is compact, the electromagnetic interference phenomenon among modules is increasingly serious, and the application electromagnetic environment of the whole system is deteriorated. Therefore, in order to prevent the electromagnetic interference from occurring in the product, it is usually necessary to cover the electronic module with a shielding cover for isolating the electromagnetic interference between the modules.
A common shielding case generally includes an upper case and a lower case, the upper case and the lower case enclose a mounting cavity, and a circuit board is mounted in the mounting cavity, so as to isolate each electronic module from each other, thereby achieving the purpose of isolating electromagnetic waves. However, in order to ensure the normal use of each electronic module, the upper case or the lower case needs to be provided with corresponding connecting holes for connecting electrical connectors such as cables, the connecting holes provide a passage for the propagation of electromagnetic waves, the electromagnetic waves can still be propagated between the shielding cases, the shielding effect of the shielding cases cannot be further improved, and for electronic products with many electronic modules and large power consumption, the conventional shielding cases cannot meet the shielding requirement of the electromagnetic waves.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide an electromagnetic shield cover and electronic product to solve the technical problem that the shield cover among the prior art is limited to the shielding capability of electromagnetic wave, shielding effect can't further promote.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an electromagnetic shield cover, includes epitheca, inferior valve and inhales the wave plate, the epitheca with the inferior valve can be dismantled and be connected, the epitheca with the inferior valve encloses jointly and establishes the shielding chamber that forms and accept the circuit board, inhale the wave plate install in be used for absorbing in the shielding chamber the electromagnetic wave of shielding intracavity.
Furthermore, the circuit board is arranged between the lower shell and the upper shell at intervals, and the wave absorbing plate is arranged between the lower shell and the circuit board and is parallel to the circuit board.
Furthermore, the wave absorbing plate is a sheet structure made of dielectric materials, magnetic medium materials, resistance materials and adhesives.
Furthermore, the width of the wave absorbing plate is 30 mm-50 mm, and the length of the wave absorbing plate is 50 mm-70 mm.
Furthermore, the thickness of the wave absorbing plate is 0.5 mm-1.5 mm.
Furthermore, the absorption value of the wave absorption plate to the electromagnetic wave with the frequency range of 4 GHz-6 GHz is 12 dB-18 dB.
Furthermore, the electromagnetic shield cover also comprises a radiating fin, the bottom surface of the radiating fin is contacted with the chip on the top surface of the circuit board, the top surface of the radiating fin is contacted with the inner surface of the upper shell, and the wave absorbing plate is adhered to the bottom surface of the circuit board.
Further, the radiating fins are radiating silica gel fins.
Furthermore, the outer wall surface of the upper shell is convexly provided with at least two connecting arms which are oppositely arranged, and the upper shell is connected with external equipment through the connecting arms.
The utility model provides an above-mentioned one or more technical scheme in the electromagnetic shield cover have one of following technological effect at least: the wave absorbing plate is arranged in the shielding cavity, and electromagnetic waves generated by electronic elements and modules such as chips and the like on the circuit board in the shielding cavity are projected onto the wave absorbing plate and absorbed by the wave absorbing plate, so that the energy of the electromagnetic waves in the shielding cavity can be further weakened on the basis that the upper shell and the lower shell isolate the electromagnetic waves, and the isolation effect of the shielding cover on the internal electromagnetic waves is improved; in addition, the electromagnetic wave entering the shielding cavity from the outside can be absorbed by the wave absorbing plate, so that the interference of the external electromagnetic wave can be reduced more effectively.
The utility model discloses another technical scheme is: an electronic product comprises a circuit board and the electromagnetic shielding cover, wherein the circuit board is contained in the shielding cavity.
The utility model discloses an electronic product shields the electromagnetic wave through using foretell electromagnetic shield cover, and the shield cover is to shielding intracavity electromagnetic wall effect reinforcing, to the interference killing feature reinforcing of outside electromagnetic wave, and electromagnetic shield effect promotes, and the inside electromagnetic environment of electronic product can optimize.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an electromagnetic shielding case according to an embodiment of the present invention;
fig. 2 is an exploded view of the electromagnetic shield of fig. 1;
fig. 3 is a cross-sectional view of the electromagnetic shield shown in fig. 1 in a width direction.
Wherein, in the figures, the respective reference numerals:
10-upper shell 11-shielding cavity 12-connecting arm
13-plug hole 20-lower shell 30-wave absorbing plate
40-radiating fin 100-circuit board 101-chip
102-mounting hole 121-connecting hole.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, it is right to combine fig. 1 ~ 3 and embodiment below the utility model discloses further detailed description proceeds. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 1-3, an embodiment of the utility model provides an electromagnetic shield cover is applicable to and carries out the electromagnetic shield to electronic component and electronic module in the electronic product, is particularly useful for unmanned aerial vehicle's antenna test shielded cell, electromagnetic compatibility shielded cell etc..
Specifically, the electromagnetic shielding case of the present embodiment is a box-shaped shielding case, as shown in fig. 1, fig. 2 and fig. 3, the electromagnetic shielding case includes an upper case 10 and a lower case 20, wherein the lower case 20 is a case with a cross section in a shape of "d", the upper case 10 is a case with a cross section in an inverted "d", the upper case 10 and the lower case 20 are detachably connected by fastening, clamping or screwing, the upper case 10 and the lower case 20 enclose a shielding cavity 11 for accommodating the circuit board 100, the circuit board 100 is installed in the shielding cavity 11, electromagnetic waves generated by electronic components or modules on the circuit board 100, such as the chip 101, are blocked by the upper case 10 and the lower case 20 and cannot be directly radiated outwards, and similarly, the electromagnetic waves outside the shielding cavity 11 are also blocked by the upper case 10 and the lower case 20 and cannot directly enter the shielding cavity 11. In the present embodiment, the upper case 10 and the lower case 20 may be made of a material having the function of absorbing electromagnetic waves or blocking the propagation of electromagnetic waves, such as conductive metal, conductive rubber, or the like.
Further, as shown in fig. 1, fig. 2 and fig. 3, the electromagnetic shielding case of the present embodiment further includes a wave absorbing plate 30, the wave absorbing plate 30 is installed in the shielding cavity 11 and is used for absorbing electromagnetic waves in the shielding cavity 11, specifically, the wave absorbing plate 30 is a structure made of a wave absorbing material and having an electromagnetic wave absorbing capability, and the wave absorbing plate 30 can absorb electromagnetic wave energy projected onto the surface of the wave absorbing plate and substantially reduce the electromagnetic wave energy in the shielding cavity 11, so that the wave absorbing plate 30 can optimize an electromagnetic environment in the shielding cavity 11 by absorbing electromagnetic waves, so that an electronic product using the electromagnetic shielding case of the present embodiment has better noise reduction capability, electromagnetic compatibility characteristic, metal interference resistance, radiation resistance, wireless charging efficiency, and the like.
Therefore, the electromagnetic shielding cover provided by the embodiment of the present invention, by disposing the wave absorbing plate 30 in the shielding cavity 11, the electromagnetic waves generated by the electronic components and modules on the circuit board 100 in the shielding cavity 11, such as the chip 101, are projected onto the wave absorbing plate 30 and absorbed by the wave absorbing plate 30, so that the electromagnetic wave energy in the shielding cavity 11 can be further weakened on the basis that the electromagnetic waves are isolated by the upper shell 10 and the lower shell 20, and the isolation effect of the shielding cover on the internal electromagnetic waves is improved; in addition, the electromagnetic wave entering the shielding cavity 11 from the outside can be absorbed by the wave-absorbing plate 30, and thus, the interference of the external electromagnetic wave can be reduced more effectively.
In another embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, the circuit board 100 is disposed between the lower shell 20 and the upper shell 10 at intervals, and the wave absorbing plate 30 is disposed between the lower shell 20 and the circuit board 100 and parallel to the circuit board 100, so that the electromagnetic wave generated by the electronic components and modules on the circuit board 100 can be directly projected onto the wave absorbing plate 30 or under the reflection action of the upper shell 10 and the lower shell 20 along the shortest path, thereby effectively accelerating the absorption speed of the wave absorbing plate 30 on the electromagnetic wave.
In another embodiment of the present invention, the wave absorbing plate 30 is a sheet structure made of dielectric material, magnetic medium material, resistive material and adhesive, the sheet structure is adapted to the shape of the circuit board 100, the installation is more convenient, the applicability is stronger, and the wave absorbing plate 30 has excellent properties of light weight, temperature resistance, moisture resistance, corrosion resistance, etc., and has a long service life without frequent replacement.
Specifically, in the present embodiment, the dielectric material may be barium titanate ceramics, ferroelectric ceramics, or the like, the magnetic dielectric material may be ferrite, carbonyl iron, or the like, and the resistive material may be carbon black, silicon carbide, or the like. For example, in the present embodiment, the wave-absorbing plate 30 is made of aluminum foil, magnetic powder, adhesive, etc., and the model is RMS 401001A.
Of course, in other embodiments, the wave-absorbing plate 30 may be made of a composite material of dielectric material, magnetic medium material and resistive material, and by adding a suitable adhesive.
In another embodiment of the present invention, the width of the wave-absorbing plate 30 is 30mm to 50mm, the length of the wave-absorbing plate 30 is 50mm to 70mm, and the size of the wave-absorbing plate 30 is matched with the size of the shielding cavity 11, so as to ensure that the wave-absorbing plate 30 can be accommodated in the shielding cavity 11. Specifically, the width of the wave-absorbing plate 30 may be 30mm, 35mm, 40mm, 45mm, 48mm, 50mm, or the like, and the length of the wave-absorbing plate 30 may be 50mm, 55mm, 60mm, 65mm, 68mm, 70mm, or the like.
Further, in the present embodiment, the thickness of the wave-absorbing plate 30 is preferably 0.5mm to 1.5mm, and may be, for example, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm, or the like. Specifically, the thickness of the wave absorbing plate 30 should be set according to the frequency of the electromagnetic wave in the shielding cavity 11, if the frequency of the electromagnetic wave in the shielding cavity 11 is low, the wave absorbing plate 30 with a relatively large thickness should be selected, and conversely, when the frequency of the electromagnetic wave in the shielding cavity 11 is high, the thin wave absorbing plate 30 may be used. In this way, in different usage environments, the wave absorbing plate 30 with an appropriate thickness is selected according to the frequency of the electromagnetic wave, and the wave absorbing plate 30 can be ensured to exert the optimal electromagnetic absorption effect.
Further, in the present embodiment, the absorption value of the wave-absorbing plate 30 for the electromagnetic wave with the frequency band of 4GHz to 6GHz is 12dB to 18dB, so that the electromagnetic shielding case of the present embodiment is particularly suitable for being disposed in electronic devices such as an antenna testing shielding case and an electromagnetic compatibility shielding case.
In another embodiment of the present invention, as shown in fig. 2 and 3, the electromagnetic shielding case further includes a heat sink 40, the bottom surface of the heat sink 40 contacts with the chip 101 on the top surface of the circuit board 100, the top surface of the heat sink 40 contacts with the inner surface of the upper case 10, the heat sink 40 is clamped between the upper case 10 and the circuit board 100, so as to conduct the heat generated by the chip 101 to the upper case 10, the wave absorbing plate 30 is adhered to the bottom surface of the circuit board 100 by double-sided adhesive tape, etc., the wave absorbing plate 30 is easy to assemble and disassemble, and the wave absorbing plate 30 and the heat sink 40 are respectively disposed on the two sides of the circuit board 100, and the heat dissipation and the electromagnetic wave. In this way, by providing the heat sink 40, the heat generated by the chip 101 on the circuit board 100 can be conducted to the upper case 10 through the heat sink 40 for dissipation, so as to accelerate the dissipation of the heat in the shielding cavity 11, thereby improving the heat dissipation capability of the electromagnetic shielding case of the present embodiment.
Specifically, in the present embodiment, the heat sink 40 is a heat dissipation silicone sheet, that is, the heat sink 40 is made of heat dissipation silicone, and has a light and thin texture and a strong heat dissipation capability.
In another embodiment of the present invention, as shown in fig. 1 and fig. 2, the outer wall surface of the upper shell 10 is convexly provided with at least two connecting arms 12 which are oppositely arranged, the upper shell 10 is connected with the external device through the connecting arms 12, so as to install the electromagnetic shielding cover of the present embodiment on the external device, the connection structure of the electromagnetic shielding cover of the present embodiment and the external device is simple, and the installation and connection are very convenient.
Specifically, in this embodiment, four connecting arms 12 are respectively protruded from four corners of the upper housing 10, and the four connecting arms 12 are respectively provided with a connecting hole 121, and the upper housing 10 is fastened and connected to the external device through four screws passing through the corresponding connecting holes 121.
In another embodiment of the present invention, as shown in fig. 1 and 2, a mounting hole 102 is opened on the circuit board 100, and the circuit board 100 is detachably connected to the upper shell 10 and/or the lower shell 20 through a fastener (not shown) such as a screw; alternatively, a clamping column (not shown) may be disposed on the inner surface of the upper shell 10 or the lower shell 20, and the clamping column is inserted into the mounting hole 102 of the circuit board 100 in an interference fit manner, so as to clamp the circuit board 100 in the shielding cavity 11. Therefore, the circuit board 100 is connected with the upper shell 10 and the lower shell 20 in a welding-free manner, so that the circuit board 100 is convenient to disassemble and assemble, and the maintenance and the repair of the circuit board 100 are more convenient.
In another embodiment of the present invention, as shown in fig. 1 and fig. 2, a plurality of insertion holes 13 are further opened on a side portion of the upper case 10 or the lower case 20 for external cables or plugs to be inserted, so as to electrically connect the circuit board 100 installed in the shielding cavity 11 of the electromagnetic shielding case of this embodiment to a circuit of an electronic device.
The utility model discloses a further embodiment still provides an electronic product, and this electronic product can have antenna test shielded cell, electromagnetic compatibility shielded cell etc. of higher anti electromagnetic interference ability for needs, for example, unmanned aerial vehicle's antenna test shielded cell, electromagnetic compatibility shielded cell etc. Specifically, the electronic product includes a circuit board 100 and the above electromagnetic shielding case, and the circuit board 100 is accommodated in the shielding cavity 11.
The electronic product of this embodiment shields the electromagnetic wave through using foretell electromagnetic shield cover, and the shielding case strengthens, strengthens to the interference killing feature of outside electromagnetic wave to the wall effect of electromagnetic wave in the shielded cavity 11, and electromagnetic shield effect promotes, and the inside electromagnetic environment of electronic product can be optimized, provides the guarantee for electronic product's normal stable work.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an electromagnetic shielding cover, its characterized in that includes epitheca, inferior valve and inhales the wave plate, the epitheca with the inferior valve can be dismantled and be connected, the epitheca with the inferior valve encloses jointly and establishes the shielding chamber that forms and accept the circuit board, inhale the wave plate install in the shielding intracavity and be used for absorbing the electromagnetic wave of shielding intracavity.
2. The electromagnetic shield of claim 1, wherein: the circuit board interval set up in inferior valve with between the epitheca, inhale the wave plate and be located inferior valve with between the circuit board and with circuit board parallel arrangement.
3. The electromagnetic shield of claim 1, wherein the wave absorbing plate is a sheet structure made of dielectric material, magneto-dielectric material, resistive material and adhesive.
4. The electromagnetic shield according to claim 1, wherein the width of the wave-absorbing plate is 30mm to 50mm, and the length of the wave-absorbing plate is 50mm to 70 mm.
5. The electromagnetic shield of claim 1, wherein the thickness of the wave absorbing plate is 0.5mm to 1.5 mm.
6. The electromagnetic shield according to claim 1, wherein the wave-absorbing plate has an absorption value of 12dB to 18dB for electromagnetic waves having a frequency band of 4GHz to 6 GHz.
7. The electromagnetic shielding case according to any one of claims 1 to 6, further comprising a heat sink, wherein a bottom surface of the heat sink contacts with the chip on the top surface of the circuit board, a top surface of the heat sink contacts with the inner surface of the upper case, and the wave absorbing plate is adhered to the bottom surface of the circuit board.
8. The electromagnetic shield of claim 7, wherein the heat sink is a heat-dissipating silicone sheet.
9. The electromagnetic shielding case according to any one of claims 1 to 6, wherein the outer wall surface of the upper case is provided with at least two oppositely disposed connecting arms, and the upper case is connected to an external device through the connecting arms.
10. An electronic product, comprising a circuit board and the electromagnetic shielding case according to any one of claims 1 to 9, wherein the circuit board is accommodated in the shielding cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020926519.3U CN212116087U (en) | 2020-05-27 | 2020-05-27 | Electromagnetic shielding cover and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020926519.3U CN212116087U (en) | 2020-05-27 | 2020-05-27 | Electromagnetic shielding cover and electronic product |
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| Publication Number | Publication Date |
|---|---|
| CN212116087U true CN212116087U (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020926519.3U Expired - Fee Related CN212116087U (en) | 2020-05-27 | 2020-05-27 | Electromagnetic shielding cover and electronic product |
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| Country | Link |
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| CN (1) | CN212116087U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112810256A (en) * | 2021-01-05 | 2021-05-18 | 东莞市鑫科精密科技有限公司 | Composite type silicon gel mobile phone protection toughened film and production method thereof |
| CN113180686A (en) * | 2021-05-07 | 2021-07-30 | 四川新源生物电子科技有限公司 | Electric signal acquisition device |
| CN114203007A (en) * | 2021-12-14 | 2022-03-18 | 三门核电有限公司 | Rod position coding card fault simulation system and troubleshooting system |
-
2020
- 2020-05-27 CN CN202020926519.3U patent/CN212116087U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112810256A (en) * | 2021-01-05 | 2021-05-18 | 东莞市鑫科精密科技有限公司 | Composite type silicon gel mobile phone protection toughened film and production method thereof |
| CN113180686A (en) * | 2021-05-07 | 2021-07-30 | 四川新源生物电子科技有限公司 | Electric signal acquisition device |
| CN114203007A (en) * | 2021-12-14 | 2022-03-18 | 三门核电有限公司 | Rod position coding card fault simulation system and troubleshooting system |
| CN114203007B (en) * | 2021-12-14 | 2024-04-09 | 三门核电有限公司 | Bar code card fault simulation system and fault investigation system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 314000 room 401-2, building 1, 189 Guigu 2nd Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province Patentee after: Zhejiang COBIT Innovation Technology Co.,Ltd. Address before: 518000 Golden Dahua Industrial Park Factory Building 1/2 Floor, No.1 Yihe Road, Shiyan Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN MICROMULTICOPTER Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210708 Address after: 272000 No. 201, Taiping East Road, Zoucheng City, Jining City, Shandong Province Patentee after: Shandong COBIT Aviation Technology Co.,Ltd. Address before: 314000 room 401-2, building 1, 189 Guigu 2nd Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: Zhejiang COBIT Innovation Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |