CN205176335U - Optical module - Google Patents
Optical module Download PDFInfo
- Publication number
- CN205176335U CN205176335U CN201521006844.3U CN201521006844U CN205176335U CN 205176335 U CN205176335 U CN 205176335U CN 201521006844 U CN201521006844 U CN 201521006844U CN 205176335 U CN205176335 U CN 205176335U
- Authority
- CN
- China
- Prior art keywords
- electric conductor
- optical module
- space
- lower casing
- golden finger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an optical module, be in including epitheca, inferior valve and setting circuit board between epitheca and the inferior valve, optical module's one end is held for the optical interface, and one end is held for the electrical interface in addition, the electrical interface end has the golden finger, the golden finger set up in on the circuit board, optical interface end with be provided with at least one electric conductor between the electrical interface end, the electric conductor is followed the epitheca extends to the inferior valve. The utility model discloses an optical module is provided with at least one electric conductor, electric conductor general through the inboard at the golden finger space between two curb plates divides two parts at least into, has blocking function's principle to the electromagnetic wave according to the space, sets up the optical module behind the electric conductor, and the biggest sharp size in space diminishes originally, can weaken the electromagnetic wave intensity through this space, and leak from a light mouthful end in the space of electromagnetic wave between circuit board and casing that can effectively reduce the golden finger radiation.
Description
Technical field
The utility model belongs to technical field of photo communication, specifically, relates to a kind of optical module.
Background technology
In optical communication system, optical module is used for the light signal that transmitted by optical connector etc. to mainboard transmission, or converts the electric signal of mainboard transmission to optical signal launch and go out.Be optical-path interface in wherein one end of optical module, for connecting optical cable by connector, one end is arrange golden finger on circuit boards in addition, and golden finger is by connecting plug-in unit connection device., there is space between circuit board and housing in current optical module, causes the electromagnetic wave of golden finger radiation to leak out from optical interface through the space between circuit board and housing, cause electromagnetic interference (EMI) to other equipment.
Summary of the invention
The utility model easily leaks out from optical interface through the space between circuit board and housing in order to the electromagnetic wave of the golden finger radiation solving existing optical module, other equipment are caused to the technical matters of electromagnetic interference (EMI), propose a kind of optical module, can solve the problem.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of optical module, the circuit board comprising upper casing, lower casing and be arranged between described upper casing and lower casing, one end of described optical module is optical interface end, one end is electrical interface end in addition, described electrical interface end has golden finger, described golden finger is arranged on described circuit board, and the inner side of described golden finger is provided with at least one electric conductor, and described electric conductor extends to described lower casing from described upper casing.
Compared with prior art, advantage of the present utility model and good effect are: optical module of the present utility model, by being provided with at least one electric conductor in the inner side of golden finger, space between the dual-side of upper casing or lower casing is at least divided into two parts by electric conductor, the space less according to diameter has the stronger principle of screening ability to electromagnetic wave, optical module after electric conductor is set, the electromagnetic wave of golden finger radiation is respectively from the holetransport of electric conductor both sides, or transmit (when there is multiple electric conductor) between adjacent two electric conductors, former space maximum straight-line dimension is diminished, the electromagnetic intensity by this hole can be weakened, electric conductor quantity is more, the maximum straight-line dimension in Electromagnetic Wave Propagation space is less, corresponding electromagnetic shielding capability is stronger, the electromagnetic wave that effectively can reduce golden finger radiation leaks from light mouth end through the space between circuit board and housing.
After reading the detailed description of the utility model embodiment by reference to the accompanying drawings, other features of the present utility model and advantage will become clearly.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of example structure schematic diagram of the optical module that the utility model proposes;
Fig. 2 is the disassembly and assembly structure schematic diagram of Fig. 1;
Fig. 3 is the lateral plan of Fig. 1;
Fig. 4 is the reduced graph for circuit board in Fig. 3 and rectangular structure thereof;
Fig. 5 is the reduced graph of Fig. 4 when not arranging electric conductor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one, the present embodiment proposes a kind of optical module, as shown in Figure 1 and Figure 2, the circuit board 13 comprising upper casing 11, lower casing 12 and be arranged between described upper casing 11 and lower casing 12, described upper casing 11 or lower casing 12 have dual-side, one end of optical module is optical interface end 10a, one end is electrical interface end 10b in addition, electrical interface end 10b has golden finger 14, golden finger 14 is arranged on circuit board 13, the inner side of golden finger 14 is provided with at least one electric conductor 15, and electric conductor 15 extends to lower casing 12 from upper casing 11.Existing optical module does not have electric conductor 15, during the work of its optical module, golden finger 14 produces electromagnetic radiation, leak out from optical interface 10a through circuit board and upper casing 11 or the space between circuit board 13 and lower casing 12, due to optical module in use, optical interface end 10a is positioned at the outside of equipment, and then electromagnetic interference (EMI) can be caused to other equipment, optical module in the present embodiment is by arranging electric conductor 15, described upper casing 11, lower casing 12 is metal material, as shown in Figure 3, for investing optical interface end projection view from electrical interface end 10b in Fig. 1, as shown in Figure 4, for the reduced graph of circuit board in Fig. 3 13 and rectangular structure thereof, Fig. 5 is the reduced graph of Fig. 4 when not arranging electric conductor, space between two sides is at least divided into two parts by electric conductor 15, also i.e. electric conductor 15 as shown in Figure 4 and the space wherein between a side 16a and the space between electric conductor 15 and another side 16b, if when electric conductor 15 is multiple, also there is space between adjacent conductive body, the maximum straight-line dimension dn in former space is all less than by the arbitrary space maximum straight-line dimension d1 and d2 after separating, arrange the space maximum straight-line dimension that the optical module electromagnetic radiation after electric conductor passes to diminish, the electromagnetic intensity by this hole can be weakened, the electromagnetic wave that effectively can reduce golden finger radiation leaks from light mouth end through the space between circuit board and housing, wherein, space maximum straight-line dimension is the maximum length in the section of space between any two points, such as, space section in the present embodiment is rectangle, maximum straight-line dimension is the cornerwise length of rectangle, when be space section being circle, then maximum straight-line dimension is the length of round diameter, the electromagnetic wave of golden finger 14 radiation transmits respectively from the space be separated, shield effectiveness formula according to space: Se=20lg (λ/2d), wherein λ is electromagnetic wavelength, d is space maximum straight-line dimension, Se is shield effectiveness, from above formula, the maximum straight-line dimension in the arbitrary space after being separated by electric conductor in this programme is all little than former maximum straight-line dimension, therefore maximum straight-line dimension d reduces, corresponding shield effectiveness Se improves.
For 10G optical module, electromagnetic wavelength X=30mm, still for the space between circuit board 13 and lower casing 12, if there is no cylindrical conducting body, as shown in Figure 4, Figure 5, circuit board 13 is 16.91mm with the space maximum length dn of lower casing 12, before adding electric conductor, the space of circuit board about 13 does not have shielding action, and its shield effectiveness Se is 0, after adding electric conductor, being positioned at the arbitrary space maximum length d1 in electric conductor 15 both sides is 7.87mm, and between circuit board 13 and lower casing 12, the shield effectiveness in space is:
Se=20lg(λ/2d)=20lg(30/(2*7.87))=5.60DB。
Adopt same method can calculate the shield effectiveness in the space added after electric conductor between circuit board 13 and upper casing 11, both summations can obtain total shield effectiveness, known, can shield energy greatly after arranging electric conductor.
As a preferred embodiment, conveniently install electric conductor 15, reduce the length of electric conductor 15, electric conductor 15 is arranged perpendicular to upper casing 11 or lower casing 12, and generally upper casing 11 and lower casing 12 be arranged in parallel, then electric conductor 15 is arranged perpendicular to both simultaneously.
According to faraday cup principle, electric conductor 15 and upper casing 11, lower casing 12 and side only need surround closed structure and can play shielding action to electromagnetism on surface, without the need to electric conductor 15 is extended on the longitudinal direction along upper casing 11 or lower casing 12, in order to reduce the materials of electric conductor 15 and reduce the complexity of assembling, electric conductor 15 is preferably column structure.Metallic screw such as can be adopted to realize, draw materials conveniently, assemble also very convenient simultaneously.
As shown in Figure 2, circuit board 13 has the through hole 13a holding electric conductor 15 and pass, because the distance between upper casing 11 and lower casing 12 can measure acquisition, therefore, the length of electric conductor 15 is according to the distance relative set between upper casing 11 and lower casing 12, under the prerequisite not affecting cloth order wire in circuit board 13, and under the prerequisite of space permission, the quantity of electric conductor 15 arranges multiple effectiveness the best.
The optical module of the present embodiment reduces by the mode arranging electric conductor 15 the outside electromagnetic radiation being decreased through optical interface end 10a from electrical interface end 10b to the electromagnetic intensity of optical interface end 10a, because electromagnetic interference (EMI) is produced by golden finger 14, preferably electric conductor 15 is arranged on the root place of golden finger 14, better to the shield effectiveness of electromagnetic interference (EMI) like this.
The tubular structure 17 matched with electric conductor 15 is fixed with at the upper surface of lower casing 12, tubular structure 17 plays electric conductor 15 fixation, the surface of electric conductor 15 has external thread, have internal thread in tubular structure 17, electric conductor 15 screws in described tubular structure 17 through after the through hole 13a of circuit board.
In order to improve effectiveness, when described electric conductor 15 is multiple, multiple electric conductor 15 is positioned at the same plane vertical with optical module length direction.
Electromagnetic shielding capability depends on the width of maximum interspace, in order at utmost reduce the width of maximum interspace, when electric conductor 15 is multiple, the plurality of electric conductor is evenly laid between two sides of upper casing or lower casing, when electric conductor 15 is one, this electric conductor 15 is positioned in the middle of two sides of upper casing or lower casing.Now the width in each space is equal, and the width of corresponding maximum interspace is minimum.
As shown in Figure 1; lower casing 12 one section tabular protective bulkhead 12a, protective bulkhead 12a outwardly compared with golden finger 14 are used for when optical module is not intended to fall, protection electrical interface end 10b; directly touch ground when preventing it from falling and cause damage, protective bulkhead 12a plays the effect of buffering simultaneously.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (10)
1. an optical module, the circuit board comprising upper casing, lower casing and be arranged between described upper casing and lower casing, one end of described optical module is optical interface end, one end is electrical interface end in addition, described electrical interface end has golden finger, and described golden finger is arranged on described circuit board, it is characterized in that, be provided with at least one electric conductor between described optical interface end and described electrical interface end, described electric conductor extends to described lower casing from described upper casing.
2. optical module according to claim 1, is characterized in that, described circuit board has through hole, and described electric conductor extends downward described lower casing through described through hole.
3. optical module according to claim 2, is characterized in that, described through hole is opened in the root place of described golden finger.
4. the optical module according to any one of claim 1-3, is characterized in that, described electric conductor is arranged perpendicular to described upper casing and/or lower casing.
5. optical module according to claim 4, is characterized in that, described electric conductor is column structure.
6. optical module according to claim 5, is characterized in that, when described electric conductor is multiple, multiple electric conductor is positioned at the same plane vertical with optical module length direction.
7. optical module according to claim 6, is characterized in that, described multiple electric conductor is evenly laid between the dual-side of described upper casing or lower casing.
8. optical module according to claim 5, is characterized in that, when described electric conductor is one, described electric conductor is positioned in the middle of the dual-side of described upper casing or lower casing.
9. the optical module according to Claims 2 or 3, it is characterized in that, the upper surface of described lower casing is fixed with the tubular structure matched with described electric conductor, the surface of described electric conductor has external thread, have internal thread in described tubular structure, described electric conductor screws in described tubular structure through after described through hole.
10. the optical module according to any one of claim 1-3, is characterized in that, the outwardly one section of tabular protective bulkhead of the more described golden finger of described lower casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006844.3U CN205176335U (en) | 2015-12-08 | 2015-12-08 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006844.3U CN205176335U (en) | 2015-12-08 | 2015-12-08 | Optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205176335U true CN205176335U (en) | 2016-04-20 |
Family
ID=55740311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521006844.3U Withdrawn - After Issue CN205176335U (en) | 2015-12-08 | 2015-12-08 | Optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205176335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403962A (en) * | 2015-12-08 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| US9746625B2 (en) | 2015-12-04 | 2017-08-29 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module |
-
2015
- 2015-12-08 CN CN201521006844.3U patent/CN205176335U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9746625B2 (en) | 2015-12-04 | 2017-08-29 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module |
| CN105403962A (en) * | 2015-12-08 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN105403962B (en) * | 2015-12-08 | 2017-09-12 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160420 Effective date of abandoning: 20170912 |