CN102300445A - Shielding device for preventing electromagnetic wave interference - Google Patents
Shielding device for preventing electromagnetic wave interference Download PDFInfo
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- CN102300445A CN102300445A CN2010102078248A CN201010207824A CN102300445A CN 102300445 A CN102300445 A CN 102300445A CN 2010102078248 A CN2010102078248 A CN 2010102078248A CN 201010207824 A CN201010207824 A CN 201010207824A CN 102300445 A CN102300445 A CN 102300445A
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Abstract
The invention discloses a shielding device for preventing electromagnetic wave interference. The shielding device comprises a circuit board unit, a shielding frame body and a first outer shielding cover, wherein the circuit board unit is provided with a plurality of interval regions; the shielding frame body is arranged on the circuit board unit; the first outer shielding cover is locally covered on the shielding frame body; the shielding frame body comprises an enclosure wall, a plurality of partition walls arranged in the enclosure wall and a cover plate covered on the enclosure wall; the enclosure wall surrounds the peripheries of the interval regions; the partition walls are arranged among the interval regions for partitioning; the cover plate is provided with a cutting line formed along the circumference of the cover plate; the cover plate covers a part of the interval regions; and the first outer shielding cover covers the other parts of the interval regions. Due to improved structural design of the shielding frame body, electromagnetic wave interference is effectively prevented, the production cost is reduced simultaneously, and a circuit board unit is convenient to test and maintain.
Description
Technical field
The present invention relates to a kind of screening arrangement that prevents Electromagnetic Interference, refer to a kind of being arranged on the circuit board especially, prevent the screening arrangement that each electronic component generates electromagnetic waves and disturbs on the circuit board.
Background technology
See also patent publication No. CN1863449, disclose a kind of " preventing the isolation structure and the method for making thereof of Electromagnetic Interference ", it is to utilize the mode of die casting moulding to make a framework, and framework inside has at least one area of isolation; Make the framework both sides respectively in conjunction with a circuit board and a lid, circuit board thereby have at least one area of isolation that is surrounded by framework and lid prevents the interference that generates electromagnetic waves between each electronic building brick to reach.
Yet the isolation structure of known Electromagnetic Interference has following shortcoming:
One, framework and the lid that is provided with moulding is two-piece design, when framework, has the gap between moulding and the lid, thereby reduces the effect that prevents Electromagnetic Interference during in conjunction with lid in the buckle mode.
Two, lid is covered on the framework top, in order to covering board, and the size of the necessary corresponding circuits plate of the size of lid, the use amount of increase material, production cost improves.
Based on this, the inventor finds that above-mentioned shortcoming can improve, so concentrate on studies especially and cooperate the utilization of scientific theory, proposes a kind of reasonable in design and effectively improve the present invention of above-mentioned defective finally.
Summary of the invention
The technical problem to be solved in the present invention is that the isolation structure of Electromagnetic Interference has reduced the effect that prevents Electromagnetic Interference, the defective that production cost improves in the prior art in order to overcome, a kind of screening arrangement that prevents Electromagnetic Interference is provided, improvement design by the mask frame body structure, prevent Electromagnetic Interference effectively, reduce production costs simultaneously and convenient test, repair circuit plate unit.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of screening arrangement that prevents Electromagnetic Interference, its characteristics are, comprising: a circuit board unit, this circuit board unit have a plate body and a plurality of interval region that is arranged at this plate body; One is arranged at the shielding framework on this circuit board unit, and this shielding framework includes: an enclosure wall, and this enclosure wall is around those interval region peripheries; A plurality of division walls that are arranged in this enclosure wall, those division walls are arranged between those interval regions with intercepting; And a cover plate that is covered on this enclosure wall, this cover plate covers the part of those interval regions, and this cover plate is provided with an at least one holes and a striping, and this striping is provided with along this cover plate periphery; And one be covered on first on this shielding framework shielding enclosing cover partly, and this first shielding enclosing cover covers this holes, and this first shielding enclosing cover covers the remainder of those interval regions.
Preferably, this cover plate have more an end face, one with the bottom surface and a groove of the corresponding setting of this end face, the striping of this groove and this cover plate periphery is provided with accordingly, this groove has the wall of two opposite tilts, and this two wall is tilted and comes together in a stress concentration point towards the direction of the end face of this cover plate by the bottom surface of this cover plate, and the position of this stress concentration point is to position that should striping.
Preferably, this cover plate has more a plurality of perforation, and those perforation are provided with at each interval along this striping, and those perforation are communicated with this groove.
Preferably, this striping is finedraw, hole line or pre-broken string.
Preferably, this enclosure wall is provided with a plurality of first snapping portions, and those first snapping portions are peripheral and setting at each interval around this holes, this first shielding enclosing cover of those first snapping portion snappings.
Preferably, closely engage between this first shielding enclosing cover and this cover plate, and this first shields enclosing cover and this cover plate fully covers those interval regions.
Preferably, this enclosure wall more is provided with a plurality of second snapping portions, those second snapping portions are around the peripheral of this striping and setting at each interval, those second snapping portion snapping one secondary shielding enclosing covers, closely engage between this first shielding enclosing cover and this secondary shielding enclosing cover, and fully cover those interval regions.
Another technical scheme of the present invention is: a kind of screening arrangement that prevents Electromagnetic Interference, and its characteristics are, comprising: a cover plate, this cover plate are provided with an at least one holes and a striping, and this striping is provided with along this cover plate periphery; One enclosure wall that is extended to form downwards by this cover plate periphery, this cover plate and this enclosure wall define and form an accommodation space, and this holes is communicated with this accommodation space, and this enclosure wall is provided with a plurality of this enclosure wall interior division wall, a plurality of first snapping portion and a plurality of second snapping portions of being arranged at; An and circuit board unit that is arranged at this cover plate below, this circuit board unit has a plate body and a plurality of interval region that is arranged at this plate body, those interval regions are positioned at this accommodation space, this enclosure wall is around those interval region peripheries, and those division walls are arranged between those interval regions with intercepting; When wherein pushing this cover plate, this cover plate is separated with this enclosure wall by the position of this striping, those first snapping portion snappings one cover the first shielding enclosing cover of this holes, those second snapping portion snapping one secondary shielding enclosing covers, closely engage between this first shielding enclosing cover and this secondary shielding enclosing cover, and fully cover those interval regions.
Preferably, this cover plate have more an end face, one with the bottom surface and a groove of the corresponding setting of this end face, the striping of this groove and this cover plate periphery is provided with accordingly, this groove has the wall of two opposite tilts, and this two wall is tilted and comes together in a stress concentration point towards the direction of the end face of this cover plate by the bottom surface of this cover plate, and the position of this stress concentration point is to position that should striping.
Preferably, this cover plate has more a plurality of perforation, and those perforation are provided with at each interval along this striping, and those perforation are communicated with this groove.
Preferably, this first shielding enclosing cover and this secondary shielding enclosing cover are the impartial rectangle lid of size.
Positive progressive effect of the present invention is:
One, the shielding framework include enclosure wall, division wall and cover plate, make each interval region around form barriering effect, prevent Electromagnetic Interference effectively.
Two, cover plate covers the part of interval region, division wall in the enclosure wall is arranged between the interval region with intercepting, makes the shielding framework be arranged in pairs or groups and less first shields enclosing cover, can reach the purpose that prevents Electromagnetic Interference, can save the use amount of material, reduce production costs.
Three, the striping of cover plate is provided with along the cover plate periphery, and in order to do making when pushing cover plate, cover plate can be separated with enclosure wall by the position of striping, and cover plate is taken off, and is convenient to test, repair circuit plate unit, to save the operating time.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, as the restriction content of the present invention.
Description of drawings
Fig. 1 prevents the exploded view of the screening arrangement of Electromagnetic Interference for the present invention.
Fig. 2 prevents another exploded view of the screening arrangement of Electromagnetic Interference for the present invention.
Fig. 3 is along the profile of 3-3 among Fig. 1.
Fig. 4 is along the profile of 4-4 among Fig. 1.
Fig. 5 prevents the constitutional diagram of the screening arrangement of Electromagnetic Interference for the present invention.
Fig. 6 prevents the user mode figure of the screening arrangement of Electromagnetic Interference for the present invention.
Fig. 7 prevents another constitutional diagram of the screening arrangement of Electromagnetic Interference for the present invention.
Fig. 8 prevents the another constitutional diagram of the screening arrangement of Electromagnetic Interference for the present invention.
[primary clustering symbol description]
The second snapping portion, 212 division walls 22
Striping 232 end faces 233
236 accommodation spaces 24 of boring a hole
Clearance space 241
The first shielding enclosing cover 30
Snapping hole 31
Secondary shielding enclosing cover 40
Snapping hole 41
The 3rd shielding enclosing cover 50
Snapping hole 51
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As depicted in figs. 1 and 2, the invention provides a kind of screening arrangement that prevents Electromagnetic Interference, its preferred embodiment includes a circuit board unit 10, a shielding framework 20 and one first shielding enclosing cover 30.
Particularly, see also Fig. 1, Fig. 2, Fig. 3 and Fig. 4, cover plate 23 have an end face 233, one with bottom surface 234, a groove 235 and a plurality of perforation 236 of end face 233 corresponding settings.Groove 235 is provided with accordingly with the striping 232 of cover plate 23 peripheries.Groove 235 has the wall 2351 of two opposite tilts, and this two wall 2351 is tilted and comes together in a stress concentration point 2352 (as Fig. 3), the position of the corresponding striping 232 in the position of stress concentration point 2352 towards the direction of the end face 233 of cover plate 23 by the bottom surface 234 of cover plate 23.The perforation 236 of being located at end face 233 is provided with at each interval along striping 232, and perforation 236 is communicated with (as Fig. 4) with groove 235.Therefore, striping 232 positions of cover plate 23 are provided with groove 235 and bore a hole 236, and the cover plate 23 that helps after stressed is taken off by enclosure wall 21, and the tester tests to make things convenient for, repair circuit plate unit 10.Yet in the present embodiment, striping 232 also can be finedraw, hole line or pre-broken string, all can reach purpose of the present invention.
The first shielding enclosing cover 30 is covered on the shielding framework 20 partly, closely engages between first shielding enclosing cover 30 and the cover plate 23, and the holes 231 of covering cover plate 23.When circuit board unit 10 is arranged at cover plate 23 belows, cover plate 23 covers the part (as the right side area among Fig. 2) of interval region 12, and the first shielding enclosing cover 30 covers the remainder (as the left field among Fig. 2) of interval region 12, making win shielding enclosing cover 30 and cover plate 23 fully cover interval region 12 (as Fig. 5), cooperating enclosure wall 21 and division wall 22 to prevent Electromagnetic Interference effectively simultaneously.Yet in the present embodiment, the first shielding enclosing cover 30 utilizes snapping hole 31 to be buckled in the first snapping portion 211 of enclosure wall 21, but is not limited to, and also can use different combinations to make the first shielding enclosing cover 30 be covered on the local location of shielding framework 20.Moreover in the present embodiment, the first shielding enclosing cover 30 is metalwork or alloying metal spare, but is not limited to, and also can use the working of plastics or other material with electromagnetic shielding effect that are coated with electromagnetic wave shielding, all can reach purpose of the present invention.Therefore, the shielding framework 20 that is arranged on the circuit board unit 10 has and the cover plate 23 of circuit board unit 10 corresponding settings and the enclosure wall 21 of connection cover plate 23 and circuit board unit 10.Cover plate 23 covers the part of interval region 12, division walls 22 in the enclosure wall 21 are arranged between the interval region 12 with intercepting, make shielding framework 20 be arranged in pairs or groups and less first shield enclosing cover 30, can reach the purpose that prevents Electromagnetic Interference, can save the use amount of material, reduce production costs.
In this, this creation prevents the screening arrangement of Electromagnetic Interference, by the improvement design of mask frame body structure, prevents Electromagnetic Interference effectively, reduces production costs simultaneously.
Moreover this creation prevents that the screening arrangement of Electromagnetic Interference can be convenient to test, repair circuit plate unit.After tester's test, repair circuit plate unit 10 finish, but the snapping hole 41 (as Fig. 6) of the second snapping portion, 212 snappings, the one secondary shielding enclosing cover 40 of enclosure wall 21, cover plate 23 after 40 replacements of secondary shielding enclosing cover are taken off covers the part of interval region 12, make between the first shielding enclosing cover 30 and the secondary shielding enclosing cover 40 and closely engage, and the first shielding enclosing cover 30 and secondary shielding enclosing cover 40 fully cover interval region 12 (as Fig. 7), to prevent Electromagnetic Interference.Therefore, the first shielding enclosing cover 30 and secondary shielding enclosing cover 40 are buckled in the first snapping portion 211 and the second snapping portion 212 discriminably, apace, increase the convenience in the assembling.
See also Fig. 8 in conjunction with Fig. 7, the present embodiment place different with the foregoing description (Fig. 7) is: this first shielding enclosing cover 30 and secondary shielding enclosing cover 40 are the impartial rectangle lid of size, hereinafter referred to as the 3rd shielding enclosing cover 50.The snapping hole 51 of this 2 the 3rd shieldings enclosing cover 50 of snapping can be distinguished by the first snapping portion 211 and the second snapping portion 212.
In sum, the present invention has following characteristic:
One, the shielding framework 20 include enclosure wall 21, division wall 22 and cover plate 23, make each interval region 12 around form barriering effect, prevent Electromagnetic Interference effectively.
Two, cover plate 23 covers the part of interval region 12, division wall 22 in the enclosure wall 21 is arranged between the interval region 12 with intercepting, make the shielding framework 20 first less shielding enclosing cover 30 of being arranged in pairs or groups, can reach the purpose that prevents Electromagnetic Interference, can save the use amount of material, reduce production costs.
Three, the striping 232 of cover plate 23 makes that along cover plate 23 periphery settings cover plate 23 can be separated with enclosure wall 21 by the position of striping 232, and cover plate 23 is taken off when pushing cover plate 23, is convenient to test, repair circuit plate unit 10, to save the operating time.
Four, cover plate 23 has groove 235 and bores a hole 236, the position of the corresponding striping 232 in the position of the stress concentration point 2352 of groove 235, and bore a hole and 236 be provided with at each interval along striping 232, the cover plate 23 that helps after stressed is taken off by enclosure wall 21, and the tester tests to make things convenient for, repair circuit plate unit 10.
Five, enclosure wall 21 is provided with a plurality of first snapping portions 211 and a plurality of second snapping portion, 212, the first shielding enclosing covers 30 and secondary shielding enclosing cover 40 and is buckled in the first snapping portion 211 and the second snapping portion 212 discriminably, apace, increases the convenience in the assembling.
Yet the above only is preferred embodiment of the present invention; and be not used in the limitation scope of patent protection of the present invention; therefore the equivalence of all utilization specifications of the present invention and graphic content generation changes, and all in like manner all is contained in the scope of the present invention, states explanation in the lump.
Claims (11)
1. a screening arrangement that prevents Electromagnetic Interference is characterized in that, comprising:
One circuit board unit, this circuit board unit have a plate body and a plurality of interval region that is arranged at this plate body;
One is arranged at the shielding framework on this circuit board unit, and this shielding framework includes:
One enclosure wall, this enclosure wall is around those interval region peripheries;
A plurality of division walls that are arranged in this enclosure wall, those division walls are arranged between those interval regions with intercepting; And
One is covered on the cover plate on this enclosure wall, and this cover plate covers the part of those interval regions, and this cover plate is provided with an at least one holes and a striping, and this striping is provided with along this cover plate periphery; And
One is covered on the shielding of first on this shielding framework enclosing cover partly, and this first shielding enclosing cover covers this holes, and this first shielding enclosing cover covers the remainder of those interval regions.
2. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 1, it is characterized in that, this cover plate have more an end face, one with the bottom surface and a groove of the corresponding setting of this end face, the striping of this groove and this cover plate periphery is provided with accordingly, this groove has the wall of two opposite tilts, and this two wall is tilted and comes together in a stress concentration point towards the direction of the end face of this cover plate by the bottom surface of this cover plate, and the position of this stress concentration point is to position that should striping.
3. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 2 is characterized in that this cover plate has more a plurality of perforation, and those perforation are provided with at each interval along this striping, and those perforation are communicated with this groove.
4. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 3 is characterized in that, this striping is finedraw, hole line or pre-broken string.
5. as each described screening arrangement that prevents Electromagnetic Interference among the claim 1-4, it is characterized in that, this enclosure wall is provided with a plurality of first snapping portions, and those first snapping portions are peripheral and setting at each interval around this holes, this first shielding enclosing cover of those first snapping portion snappings.
6. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 5 is characterized in that, closely engage between this first shielding enclosing cover and this cover plate, and this first shields enclosing cover and this cover plate fully covers those interval regions.
7. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 5, it is characterized in that, this enclosure wall more is provided with a plurality of second snapping portions, those second snapping portions are around the peripheral of this striping and setting at each interval, those second snapping portion snapping one secondary shielding enclosing covers, closely engage between this first shielding enclosing cover and this secondary shielding enclosing cover, and fully cover those interval regions.
8. a screening arrangement that prevents Electromagnetic Interference is characterized in that, comprising:
One cover plate, this cover plate are provided with an at least one holes and a striping, and this striping is provided with along this cover plate periphery;
One enclosure wall that is extended to form downwards by this cover plate periphery, this cover plate and this enclosure wall define and form an accommodation space, and this holes is communicated with this accommodation space, and this enclosure wall is provided with a plurality of this enclosure wall interior division wall, a plurality of first snapping portion and a plurality of second snapping portions of being arranged at; And
One is arranged at the circuit board unit of this cover plate below, this circuit board unit has a plate body and a plurality of interval region that is arranged at this plate body, those interval regions are positioned at this accommodation space, this enclosure wall is around those interval region peripheries, and those division walls are arranged between those interval regions with intercepting; Wherein
When pushing this cover plate, this cover plate is separated with this enclosure wall by the position of this striping, those first snapping portion snappings one cover the first shielding enclosing cover of this holes, those second snapping portion snapping one secondary shielding enclosing covers, closely engage between this first shielding enclosing cover and this secondary shielding enclosing cover, and fully cover those interval regions.
9. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 8, it is characterized in that, this cover plate have more an end face, one with the bottom surface and a groove of the corresponding setting of this end face, the striping of this groove and this cover plate periphery is provided with accordingly, this groove has the wall of two opposite tilts, and this two wall is tilted and comes together in a stress concentration point towards the direction of the end face of this cover plate by the bottom surface of this cover plate, and the position of this stress concentration point is to position that should striping.
10. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 9 is characterized in that this cover plate has more a plurality of perforation, and those perforation are provided with at each interval along this striping, and those perforation are communicated with this groove.
11. the screening arrangement that prevents Electromagnetic Interference as claimed in claim 8 is characterized in that, this first shielding enclosing cover and this secondary shielding enclosing cover are the impartial rectangle lid of size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207824.8A CN102300445B (en) | 2010-06-23 | 2010-06-23 | Shielding device for preventing electromagnetic wave interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207824.8A CN102300445B (en) | 2010-06-23 | 2010-06-23 | Shielding device for preventing electromagnetic wave interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102300445A true CN102300445A (en) | 2011-12-28 |
| CN102300445B CN102300445B (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010207824.8A Active CN102300445B (en) | 2010-06-23 | 2010-06-23 | Shielding device for preventing electromagnetic wave interference |
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| Country | Link |
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| CN (1) | CN102300445B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320961A (en) * | 2014-09-30 | 2015-01-28 | 联想(北京)有限公司 | Printed circuit board (PCB) and hand-held terminal |
| CN104749456A (en) * | 2013-12-31 | 2015-07-01 | 深圳麦逊电子有限公司 | PCB test jig having electromagnetic shielding function and manufacturing method thereof |
| CN107018645A (en) * | 2017-05-15 | 2017-08-04 | 广东欧珀移动通信有限公司 | Shielding construction, shielding construction preparation method, circuit module and mobile electronic terminal |
| CN110461138A (en) * | 2019-08-02 | 2019-11-15 | 华为技术有限公司 | Circuit board assemblies and electronic equipment |
| CN111048925A (en) * | 2019-12-30 | 2020-04-21 | 维沃移动通信有限公司 | Card seat and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121681A (en) * | 1994-07-29 | 1996-05-01 | 松下电器产业株式会社 | Electronic equipment device |
| EP1061789A2 (en) * | 1999-06-18 | 2000-12-20 | Nokia Mobile Phones Ltd. | Shielding can for a printed circuit board |
| CN1466414A (en) * | 2002-06-03 | 2004-01-07 | 明基电通股份有限公司 | Frame structure for electronic apparatus |
| CN1863449A (en) * | 2005-05-10 | 2006-11-15 | 金宝电子工业股份有限公司 | Isolation structure for preventing electromagnetic interference and making method thereof |
| US20090273912A1 (en) * | 2008-04-30 | 2009-11-05 | Apple Inc. | Interlocking emi shield |
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2010
- 2010-06-23 CN CN201010207824.8A patent/CN102300445B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121681A (en) * | 1994-07-29 | 1996-05-01 | 松下电器产业株式会社 | Electronic equipment device |
| EP1061789A2 (en) * | 1999-06-18 | 2000-12-20 | Nokia Mobile Phones Ltd. | Shielding can for a printed circuit board |
| CN1466414A (en) * | 2002-06-03 | 2004-01-07 | 明基电通股份有限公司 | Frame structure for electronic apparatus |
| CN1863449A (en) * | 2005-05-10 | 2006-11-15 | 金宝电子工业股份有限公司 | Isolation structure for preventing electromagnetic interference and making method thereof |
| US20090273912A1 (en) * | 2008-04-30 | 2009-11-05 | Apple Inc. | Interlocking emi shield |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749456A (en) * | 2013-12-31 | 2015-07-01 | 深圳麦逊电子有限公司 | PCB test jig having electromagnetic shielding function and manufacturing method thereof |
| CN104320961A (en) * | 2014-09-30 | 2015-01-28 | 联想(北京)有限公司 | Printed circuit board (PCB) and hand-held terminal |
| CN107018645A (en) * | 2017-05-15 | 2017-08-04 | 广东欧珀移动通信有限公司 | Shielding construction, shielding construction preparation method, circuit module and mobile electronic terminal |
| CN110461138A (en) * | 2019-08-02 | 2019-11-15 | 华为技术有限公司 | Circuit board assemblies and electronic equipment |
| CN110461138B (en) * | 2019-08-02 | 2024-08-09 | 华为技术有限公司 | Circuit board assembly and electronic equipment |
| CN111048925A (en) * | 2019-12-30 | 2020-04-21 | 维沃移动通信有限公司 | Card seat and electronic equipment |
| CN111048925B (en) * | 2019-12-30 | 2021-05-07 | 维沃移动通信有限公司 | Card seat and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102300445B (en) | 2014-02-26 |
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Effective date of registration: 20150916 Address after: 201206 Shanghai City Jingqiao export processing zone of Pudong New Area dragon road 501 Patentee after: USI ELECTRONICS (SHANGHAI) CO., LTD. Address before: Zhangjiang hi tech park integrated circuit industry Zhang Road 201203 Shanghai City No. 1558 Patentee before: Huanxu Electronics Co., Ltd. Patentee before: Universal Global Scientific Industries Co., Ltd. |