CN201408827Y - Unit for improving shielding property of shielding box with holes and communication device - Google Patents
Unit for improving shielding property of shielding box with holes and communication device Download PDFInfo
- Publication number
- CN201408827Y CN201408827Y CN2009200002266U CN200920000226U CN201408827Y CN 201408827 Y CN201408827 Y CN 201408827Y CN 2009200002266 U CN2009200002266 U CN 2009200002266U CN 200920000226 U CN200920000226 U CN 200920000226U CN 201408827 Y CN201408827 Y CN 201408827Y
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- China
- Prior art keywords
- packing ring
- shielding box
- box body
- shielding
- wire packing
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- Expired - Fee Related
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Abstract
The utility model discloses a unit for improving the shielding property of a shielding box with holes, the shielding box is provided with plug connectors which are extended out of the holes, and the unit is an elastic wire washer which seals the electromagnetic gap between the plug connector and the hole. The utility model also discloses a communication device, which comprises the shielding box, amicrowave radio frequency circuit, at least one plug connector and at least one elastic wire washer; the shielding box is provided with at least one hole; the microwave radio frequency circuit is arranged in the shielding box; the plug connectors are respectively mounted on the surface of the microwave radio frequency circuit and are extended out of the holes; and the elastic wire washers are respectively sleeved on the plug connectors to seal the electromagnetic gaps between the plug connectors and the holes. Compared with the conventional shielding nut, the wire washer not only has a good shielding effect but also increases the efficiency of assembly on a production line and the efficiency of disassembly and assembly for reparation.
Description
Technical field
The utility model relates to the communications field, has the device of shielding properties of shielding box body of perforate and the communication apparatus that uses this device in particular to a kind of improvement.
Background technology
The microwave radio circuit generally is the planar microstrip circuit, inputs or outputs radio frequency interface and adopts the microwave connector of two kinds of installation forms that power is outputed to radio frequency cable usually.
A kind of is the socket that adopts the screw installation form, this socket is installed need be slotted at the shielding box body side surface, and install with screw, and the fuse with socket is welded on the planar microstrip circuit at last.Because adopt manual welding, the failure rate during welding is higher.
Another kind is the socket that adopts the plug-in mounting form, and socket can directly carry out SMT (Surface Mounted Technology, surface-assembled) welding, is fit to requirements of large-scale production, the efficient height.Based on this reason, the socket that can carry out the SMT welding has obtained increasing application.But use this socket, need perforate on the shielding box body.
Usually the diameter of perforate is greater than socket diameter 2mm, otherwise can bring the problem of misalignment when the shielding box body is installed.When output high-power RF signal, the radiation that transmits is very strong, causes radiofrequency signal leakage, EMC (Electro MagneticCompatibility, Electro Magnetic Compatibility) test to exceed standard by the slit of perforate.For the low noise amplifier circuit that receives usefulness, the extraneous noise signal can enter shielding box body inside by the space between SMA (socket) and the perforate, causes the deterioration of noise factor and the reduction of receiver sensitivity.
In order to overcome this two problems, a nut is installed on the external SMA of shielding box usually, perforate is covered fully to reach the effect of shielding.But the method shield effectiveness of this nut shielding is bad, and nut is installed and need nut be fixed with spanner simultaneously, and also needs nut is taken off when maintenance, and efficiency of assembling is low, removes the shielding box body when being not easy to keep in repair.
Therefore, be necessary prior art is improved.
The utility model content
The utility model purpose is to provide the device of the shielding properties of the shielding box body that a kind of improvement has perforate, to avoid the using shielding nut to cause the dismounting inconvenience of shielding box body.
For this reason, the utility model provides the device of the shielding properties of the shielding box body that a kind of improvement has perforate, this shielding box body has the plug connector that stretches out perforate, this device for the electromagnetism gap between sealing plug connector and the perforate and rubber-like wire packing ring.
Wherein, above-mentioned wire packing ring is steel wire packing ring or filamentary silver packing ring or beryllium copper silk packing ring.
Wherein, the wire of above-mentioned wire packing ring is accordion.
In addition, the utility model also provides a kind of communication apparatus, comprising: the shielding box body has at least one perforate; The microwave radio circuit is arranged in the shielding box body; At least one plug connector is distinguished surface-assembled on the microwave radio circuit, and stretches out from perforate; At least one rubber-like wire packing ring is sheathed on respectively on each plug connector, the electromagnetism gap between sealing plug connector and the perforate.
Wherein, above-mentioned plug connector has the chassis that is positioned at the shielding box body, and the wire packing ring is pressed between the inner roof wall of chassis and shielding box body.
Wherein, above-mentioned plug connector is a socket.
Wherein, above-mentioned wire packing ring is steel wire packing ring or filamentary silver packing ring or beryllium copper silk packing ring.
Wherein, the wire of above-mentioned wire packing ring is accordion.
Wherein, the external diameter of above-mentioned wire packing ring is greater than perforate, and the internal diameter of wire packing ring is less than the plug connector external diameter.
Use the nut shielding to compare with prior art, the utility model uses the wire packing ring to shield, have better shield effectiveness on the one hand, be that the wire packing ring tightly is enclosed within on the plug connector, wire packing ring external diameter is greater than shielding box body bore size, thus the wire packing ring from the inboard shutoff of shielding box body shielding box body open slit.Because of the elasticity of wire packing ring make load onto the shielding box body after, the conductively-closed box body presses, can guarantee that " seamless " that shield box body and plug connector contacts, reduced the shielding slit of using nut to shield, and then reduced the external radiated transmission power of inner high-power signal, also can reduce simultaneously the interference of external signal, reduce noise factor, improve shield effectiveness LNA circuit in the shielding box body.Production line assembling and maintenance dismounting efficient have been improved on the other hand.
Be noted that the description and the following detailed description all are exemplary, being intended to provides further instruction to desired the utility model.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.Below with reference to figure, other purpose, feature and effect of the present utility model is described in further detail.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part.Among the figure:
Fig. 1 shows communication apparatus of the present utility model;
Fig. 2 shows the schematic diagram that is installed together according to wire packing ring of the present utility model and socket; And
Fig. 3 shows the STRUCTURE DECOMPOSITION schematic diagram of wire packing ring of the present utility model and socket.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 shows communication apparatus of the present utility model.As shown in the figure, communication apparatus 01 of the present utility model comprises: have the shielding box body 10 of loam cake 11 and lower cover 13, be positioned at the microwave radio circuit 20 of shielding box body 10 etc.Wherein, microwave radio circuit 20 is provided with a plurality of sockets 21, and these sockets 21 stretch out from the perforate 11a on the loam cake 11.Each socket 21 is furnished with corresponding metal silk packing ring 30 respectively, and this wire packing ring 30 can be sheathed on each socket, thereby the electromagnetism gap between sealing socket and the perforate stops electromagnetic wave to pass in and out via this gap.
In shielding box body 10 shown in Figure 1, the quantity of perforate 11a is two, therefrom stretches out for two sockets 21, expect that easily in shielding box body 10, the quantity of perforate 11a is not limited to two, can be one, also can be for more than two, for corresponding socket from wherein stretching out.
Fig. 2 shows the schematic diagram that is installed together according to wire packing ring 30 of the present utility model and socket 21, and Fig. 3 shows the STRUCTURE DECOMPOSITION schematic diagram of wire packing ring of the present utility model and socket.
As shown in Figures 2 and 3, wire packing ring 30 in the form of a ring, its internal diameter is slightly less than the joint 21a external diameter of socket 21, guarantees closely to contact with socket; Its external diameter greater than shielding box body open 11a about 1mm～2mm, height greater than chassis 21b to shield push up in the box body apart from about 1mm～2mm, because the wire packing ring is flexible, the wire packing ring is compacted after the shielding box body is installed, closely contact with the shielding inboard wall of cartridge, 11a tightly shields to the shielding box body open.
Using the assembling process of wire packing ring to be on the production line: before assembling shielding box body, (the packing ring internal diameter is slightly less than joint on socket 21 the wire pads snare earlier, can be spun on the joint), make the woven wire in the wire packing ring closely wrap up socket, and be on the chassis, the shielding box body is installed then, resilient wire packing ring is pressed between shielding box body and the socket.
During installation, earlier socket 21 is carried out normal SMT and mount, then wire packing ring 30 is installed on the joint 21a of socket 21, shielding box body 10 is installed at last.After loading onto the shielding box body, because gasket design thickness is greater than the distance of chassis to shielding box body inner roof wall, the shielding box body is installed the back packing ring with oppressed, closely fill the hole seam between shielding box body and the socket, realized that the shielding box body contacts with the seamless of socket, and good earth, when external interference is conducted near the shielding box body open, since the hole sew block fully and direct short-circuit to ground, can not enter the shielding box soma and disturb equipment, thereby realize the shielding of shielding box body by hole seam.
Be the example that on SMA-KHD type radio frequency socket, uses according to wire packing ring sample of the present utility model below.
This model socket microwave junction external diameter 6.2mm, the high 11.4mm in top to chassis, shielding box body open 8mm, assembling finishes rear chassis to shielding the interior apex distance of box body from 4mm.This wire packing ring manufacturing process is: earlier material metal silk (steel wire) is carried out fold and handle, make it become irregular polyline shaped, then around to the coiling rod of diameter 5mm.Make wire packing ring external diameter 10mm, internal diameter 5mm, high 6mm.
According to the method described above the wire packing ring of coiling in the form of a ring, wire packing ring internal diameter is less than the receptacle terminal external diameter; Wire packing ring external diameter is greater than the about 1.2mm of shielding box body open; Wire packing ring height arrives the shielding box body apart from about 2mm greater than the chassis.Before assembling shielding box body on the production line, earlier wire pads snare (the packing ring internal diameter can be spun on the joint less than joint) on joint, make the wire packing ring closely wrap up socket, and be in (as shown in Figure 2) on the chassis; The shielding box body is installed then, and the wire packing ring is installed back pressurized generation deformation at the shielding box body, closely contacts with the shielding inboard wall of cartridge, and the shielding box body open is tightly shielded.After testing, receive noise factor before and after this screening arrangement and be respectively 2.23dB and 1.41dB, shield effectiveness is obvious.
Equally, the wire packing ring twines with filamentary silver, beryllium copper silk and also can play good shield effectiveness.
Describe among the embodiment in the above, the plug connector that stretches out from 10 perforates of shielding box body is a socket, in other embodiments, the plug connector that stretches out from 10 perforates of shielding box body can be the cylindrical member with other function or purposes also, and uses wire packing ring of the present utility model can reach same shield effectiveness.
By above description as can be seen, the utility model is compared with traditional shielding nut: have better shield effectiveness on the one hand, improved production line assembling and maintenance dismounting efficient on the other hand.
Different with nut shielding, the wire packing ring tightly is enclosed within on the receptacle terminal, and wire packing ring external diameter is greater than shielding box body bore size, thus the wire packing ring from the inboard shutoff of shielding box body shielding box body open slit.Because the elasticity of wire packing ring, after making it load onto the shielding box body, the conductively-closed box body presses, can guarantee that " seamless " that shield box body and socket contacts, reduced the shielding slit of using nut to shield, thereby reduced the external radiated transmission power of inner high-power signal, also can reduce the interference of external signal simultaneously LNA circuit in the shielding box body, reduce noise factor, improved shield effectiveness.For example, on the output SMA of 1800MHz GSM signal power amplifier socket, used this device, can reduce the radiated emission signal level and reach 15～20dB.Again for example, on a kind of TD power amplifier accessory power outlet, when adopting the shielding nut, it is 1.923 that center frequency point receives noise factor, and measured value is 1.411 when adopting the woven wire packing ring, makes noise factor that about 0.5 optimization arranged.
Owing to need not use the shielding nut, cancelled removing and installing the operation that shields nut, obviously improved the efficient and the maintenance dismounting efficient of assembling line, the situation of also having avoided shielding box body or socket to be damaged simultaneously owing to the installation that shields nut.If adopt the shielding nut, need after being installed, the shielding box body nut be installed on the socket with spanner, and efficient is very low and cause shielding box body or socket to damage easily.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. an improvement has the device of shielding properties of the shielding box body of perforate, described shielding box body has the plug connector that stretches out described perforate, it is characterized in that, described device for the electromagnetism gap between sealing described plug connector and the described perforate and rubber-like wire packing ring.
2. device according to claim 1 is characterized in that, described wire packing ring is steel wire packing ring or filamentary silver packing ring or beryllium copper silk packing ring.
3. device according to claim 1 and 2 is characterized in that the wire of described wire packing ring is accordion.
4. communication apparatus comprises:
The shielding box body has at least one perforate;
The microwave radio circuit is arranged in the described shielding box body;
At least one plug connector is distinguished surface-assembled on described microwave radio circuit, and stretches out from described perforate, it is characterized in that, also comprises
At least one rubber-like wire packing ring is sheathed on respectively on each described plug connector, seals the electromagnetism gap between described plug connector and the described perforate.
5. communication apparatus according to claim 4 is characterized in that described plug connector has the chassis that is positioned at described shielding box body, and described wire packing ring is pressed between the inner roof wall of described chassis and described shielding box body.
6. communication apparatus according to claim 4 is characterized in that, described plug connector is a socket.
7. according to each described communication apparatus in the claim 4 to 6, it is characterized in that described wire packing ring is steel wire packing ring or filamentary silver packing ring or beryllium copper silk packing ring.
8. communication apparatus according to claim 7 is characterized in that the wire of described wire packing ring is accordion.
9. communication apparatus according to claim 8 is characterized in that, the external diameter of described wire packing ring is greater than described perforate, and the internal diameter of described wire packing ring is less than described plug connector external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200002266U CN201408827Y (en) | 2009-01-08 | 2009-01-08 | Unit for improving shielding property of shielding box with holes and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200002266U CN201408827Y (en) | 2009-01-08 | 2009-01-08 | Unit for improving shielding property of shielding box with holes and communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408827Y true CN201408827Y (en) | 2010-02-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200002266U Expired - Fee Related CN201408827Y (en) | 2009-01-08 | 2009-01-08 | Unit for improving shielding property of shielding box with holes and communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408827Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103917077A (en) * | 2012-12-29 | 2014-07-09 | 中国航空工业集团公司第六三一研究所 | Electromagnetic leakage prevention device used for connector |
| CN106788783A (en) * | 2017-03-29 | 2017-05-31 | 上海新仪微波化学科技有限公司 | The continuous rotation communication device and method of a kind of anti-microwave interference |
| CN108650873A (en) * | 2018-05-15 | 2018-10-12 | 河南科技大学第附属医院 | A kind of environmental protecting device eliminated nuclear magnetic resonance and human body radiation is endangered |
| CN110505799A (en) * | 2019-09-27 | 2019-11-26 | 湖南华盾星通信息科技有限公司 | A kind of display with rotary shaft end Gap electromagnetic sealing structure |
-
2009
- 2009-01-08 CN CN2009200002266U patent/CN201408827Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103917077A (en) * | 2012-12-29 | 2014-07-09 | 中国航空工业集团公司第六三一研究所 | Electromagnetic leakage prevention device used for connector |
| CN106788783A (en) * | 2017-03-29 | 2017-05-31 | 上海新仪微波化学科技有限公司 | The continuous rotation communication device and method of a kind of anti-microwave interference |
| CN108650873A (en) * | 2018-05-15 | 2018-10-12 | 河南科技大学第附属医院 | A kind of environmental protecting device eliminated nuclear magnetic resonance and human body radiation is endangered |
| CN110505799A (en) * | 2019-09-27 | 2019-11-26 | 湖南华盾星通信息科技有限公司 | A kind of display with rotary shaft end Gap electromagnetic sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20140108 |