CN115201976A - Electromagnetic shielding structure and optical module - Google Patents
Electromagnetic shielding structure and optical module Download PDFInfo
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- CN115201976A CN115201976A CN202210858136.0A CN202210858136A CN115201976A CN 115201976 A CN115201976 A CN 115201976A CN 202210858136 A CN202210858136 A CN 202210858136A CN 115201976 A CN115201976 A CN 115201976A
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- electromagnetic shielding
- connecting plate
- shielding structure
- edge
- optical module
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
- G02B6/4277—Protection against electromagnetic interference [EMI], e.g. shielding means
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of optical communication, and provides an electromagnetic shielding structure which comprises a connecting plate capable of being sleeved on a shell, wherein the connecting plate is in a frame shape with four side surfaces, and one side surface of the connecting plate is provided with a notch for the shell to pass through, and the electromagnetic shielding structure is characterized in that: a plurality of finger-shaped elastic sheets are arranged along the edge of one end of the connecting plate, each elastic sheet extends in the direction away from the connecting plate, and a space is formed between every two adjacent elastic sheets on the same edge; each shell fragment all has the contained angle rather than the border that sets up, on every border, the terminal of every shell fragment shelters from the interval that forms between this adjacent shell fragment with the orthographic projection at border. An optical module is also provided, which comprises the electromagnetic shielding structure. Compared with the conventional elastic sheet which is vertically arranged relative to the edge, the elastic sheet which is obliquely arranged relative to the edge can eliminate gaps in the electromagnetic wave leakage direction, and the electromagnetic shielding effect is achieved.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an electromagnetic shielding structure and an optical module.
Background
According to the stipulation of the optical module industry agreement MSA, the optical module has the characteristic of 'hot plug', namely, the optical module can be connected with or disconnected from the equipment under the condition of not switching off the power supply of the equipment. There is therefore a need for an optical module that can be repeatedly inserted and removed for use on a device, typically by mounting the optical module in a removable mounting cage on the device. In order to ensure that the optical module is easy to insert and pull out, the requirement on the manufacturing size and precision of parts is low, and a certain gap is reserved between the optical module and the installation cage.
Because the photoelectric and electro-optical conversion circuits in the optical module are particularly easy to generate over-standard EMI (electromagnetic radiation), and a plurality of optical modules can simultaneously work on a using device, the EMI leakage needs to be greatly reduced so as to meet the electromagnetic compatibility safety standard. Since there is a gap between the optical module and the cage, which is usually the critical path for EMI leakage inside the device and the optical module, it is necessary to eliminate the gap as much as possible to reduce EMI leakage.
Disclosure of Invention
The invention aims to provide an electromagnetic shielding structure and an optical module, which can at least solve part of defects in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: the utility model provides an electromagnetic shielding structure, is including the connecting plate that can overlap on the casing, the connecting plate is the frame form that has four sides, just one of them side of connecting plate is seted up the breach that supplies the casing to pass, its characterized in that: a plurality of finger-shaped elastic sheets are arranged along the edge of one end of the connecting plate, each elastic sheet extends in the direction away from the connecting plate, and a space is formed between every two adjacent elastic sheets on the same edge; each elastic sheet has an included angle with the edge arranged on the elastic sheet, and on each edge, the orthographic projection of the tail end of each elastic sheet and the edge shields the interval formed between the tail end of each elastic sheet and the adjacent elastic sheet.
Furthermore, the inclination directions of the elastic sheets are consistent on each edge.
Furthermore, on each edge, the size of each elastic sheet is equal and the interval between two adjacent elastic sheets is also equal.
Furthermore, the elastic pieces on each edge are obliquely arranged towards the same direction around the four side faces of the connecting plate.
Furthermore, the connecting plate is provided with a buckle which can be clamped into a clamping groove corresponding to the shell.
Further, the buckle is arranged on the side face of the connecting plate with the notch.
Further, the buckle is arranged on the edge of the side face with the notch at the notch, and the buckle bends towards the inside of the connecting plate.
The embodiment of the invention provides another technical scheme: an optical module comprises a shell and the electromagnetic shielding structure, wherein the connecting plate of the electromagnetic shielding structure is sleeved on the shell, and each elastic sheet extends towards the direction of an optical port of the optical module.
Furthermore, the position of the shell close to the optical port of the optical module sinks and sinks to form a groove for embedding the electromagnetic shielding structure.
Further, still include the cage, when the cage cover with electromagnetic shield structure covers completely on the casing, each shell fragment is squeezed to contact the casing.
Compared with the prior art, the invention has the beneficial effects that:
1. through the shell fragment that sets up for the border slope of design, compare in the current shell fragment that sets up perpendicularly for the border, can eliminate the gap in the electromagnetic wave reveals the direction, play the electromagnetic shield effect.
2. Compared with the prior art in which a part is added to eliminate a gap or the gap is greatly changed to eliminate the gap, the electromagnetic shielding structure only makes a certain inclination angle in the extending direction of the conventional elastic sheet, is low in manufacturing cost and not greatly changed, and does not occupy more space of an optical module.
Drawings
Fig. 1 is a perspective view of an electromagnetic shielding structure according to an embodiment of the present invention;
fig. 2 is a perspective view of a conventional electromagnetic shielding structure;
FIG. 3 is a schematic diagram of the first view of FIG. 1;
FIG. 4 is a schematic diagram of a second perspective view of FIG. 1;
FIG. 5 is a schematic view of the first viewing angle of FIG. 2;
FIG. 6 is a schematic view of the second view of FIG. 2;
fig. 7 is a schematic diagram of an optical module according to an embodiment of the present invention (no cage and no electromagnetic shielding structure are provided);
fig. 8 is a schematic diagram of an optical module (without a cage) according to an embodiment of the present invention;
FIG. 9 is a schematic view of the cage of FIG. 8 nested (the cage does not completely cover the housing);
in the reference symbols: 1-connecting plate; 2-a spring plate; 3-a notch; 4-interval; 5-a shell; 6-a clamping groove; 7-buckling; 8-cage; 9-a groove; a-site; b-a gap; 10-electromagnetic shielding structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, an electromagnetic shielding structure according to an embodiment of the present invention includes a connecting plate 1 capable of being sleeved on a housing 5, where the connecting plate 1 is in a frame shape having four side surfaces, and one side surface of the connecting plate 1 is provided with a notch 3 for the housing 5 to pass through, and the electromagnetic shielding structure is characterized in that: a plurality of finger-shaped elastic sheets 2 are arranged along the edge of one end of the connecting plate 1, each elastic sheet 2 extends in the direction away from the connecting plate 1, and a space 4 is arranged between every two adjacent elastic sheets 2 on the same edge; each shell fragment 2 all has the contained angle rather than the border that sets up, on every border, every the terminal of shell fragment 2 shelters from the interval 4 that forms between this adjacent shell fragment 2 with the orthographic projection at border. In this embodiment, through the designed elastic sheet 2 that is obliquely arranged relative to the edge, compared with the existing elastic sheet 2 that is vertically arranged relative to the edge, the gap B can be eliminated in the electromagnetic wave leakage direction, and an electromagnetic shielding effect is achieved. As shown in fig. 2, 4 and 5, a conventional electromagnetic shielding manner is shown, in fig. 5, since the elastic sheet 2 is disposed perpendicular to the edge, electromagnetic waves coming from the optical port can directly leak through the gap B, which causes a certain degree of EMI leakage, resulting in poor overall shielding performance, but in this embodiment, the elastic sheet 2 is tilted, so that the front projection of the tail end and the edge of the elastic sheet 2 shields the gap 4 formed between the tail end and the edge of the adjacent elastic sheet 2, specifically, as shown in fig. 4, the position a is made into a dotted line perpendicular to the edge, it can be seen that the projection of the position a can just cover the gap 4, and the gap B is shielded, since the elastic sheets 2 all extend in the direction of the optical port, the electromagnetic waves coming from the optical port can be shielded by the tail end of the elastic sheet 2, thereby achieving the shielding effect.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, the inclination directions of the elastic pieces 2 are the same at each edge. On each edge, the size of each elastic sheet 2 is equal, and the interval 4 between two adjacent elastic sheets 2 is also equal. Encircle four sides of connecting plate 1, each on each border shell fragment 2 all sets up towards same direction slope. In the present embodiment, the inclination angle of the elastic pieces 2 is related to the length of the elastic pieces 2, and the number of the elastic pieces 2 is not limited in the present embodiment as long as the orthographic projection of the ends of the elastic pieces 2 can be ensured to block the gap 4. However, the die is inclined towards the same direction, so that the die opening processing is convenient, and the manufacturing difficulty is reduced.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, the connecting plate 1 is provided with a buckle 7 that can be snapped into a corresponding slot 6 of the housing 5. In this embodiment, the electromagnetic shielding structure 10 can be fixed on the housing 5 by means of a snap 7 connection after being sleeved on the housing 5. Preferably, the buckle 7 is arranged on the side surface of the connecting plate 1 with the notch 3. The buckle 7 is arranged on the edge of the side face with the notch 3 at the notch 3, and the buckle 7 bends towards the inside of the connecting plate 1. The notch 3 is provided for conveniently forming a groove 9 corresponding to the notch on the shell 5. The two buckles 7 can be arranged, and the two clamping grooves 6 are correspondingly arranged on the shell 5, so that the buckles 7 can be clamped and connected conveniently.
Referring to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, an optical module according to an embodiment of the present invention includes a housing 5 and the electromagnetic shielding structure 10, where the connecting board 1 of the electromagnetic shielding structure 10 is sleeved on the housing 5, and each of the elastic pieces 2 extends toward an optical port of the optical module. In this embodiment, the electromagnetic shielding structure 10 is applied to an optical module, and can directly replace the conventional electromagnetic shielding structure 10, thereby saving the cost of replacing the optical module in an enterprise. By applying the electromagnetic shielding structure 10, compared with the conventional elastic sheet 2 which is vertically arranged relative to the edge, the designed elastic sheet 2 which is obliquely arranged relative to the edge can eliminate the gap B in the electromagnetic wave leakage direction, thereby achieving the electromagnetic shielding effect. As shown in fig. 2, fig. 4 and fig. 5, which are conventional electromagnetic shielding manners, in fig. 5, since the elastic sheet 2 is disposed perpendicular to the edge, the electromagnetic wave coming from the light opening can directly leak through the gap B, which results in a certain degree of EMI leakage, and the overall shielding performance is not very good, in this embodiment, the elastic sheet 2 is subjected to an inclination treatment, so that the front projection of the tail end of the elastic sheet 2 and the edge shields the gap 4 formed between the tail end of the elastic sheet and the adjacent elastic sheet 2, specifically, as shown in fig. 4, the part a is perpendicular to the edge as a dotted line, which can just cover the gap 4 in the projection, and shields the gap B, since the elastic sheets 2 all extend in the direction towards the light opening, the electromagnetic wave coming from the light opening can be shielded by the tail end of the elastic sheet 2, and thus, the shielding effect is achieved.
Referring to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, as an optimized solution of the embodiment of the present invention, a position of the housing 5 near an optical port of an optical module is sunk to form a recess 9 for embedding the electromagnetic shielding structure 10. In this embodiment, the recess 9 may be formed by sinking on the upper surface of the housing 5, so as to facilitate the embedding of the electromagnetic shielding structure 10, and not occupy the space of the optical module.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 3, fig. 4, fig. 7, fig. 8, and fig. 9, the optical module further includes a cage 8, when the cage 8 is sleeved on the housing 5, the electromagnetic shielding structure 10 is completely covered, and each of the elastic pieces 2 is pressed to contact the housing 5. In this embodiment, after the cage 8 is sleeved on the housing 5, the electromagnetic shielding structure 10 can prevent the electromagnetic wave of the optical port from leaking from the gap B to between the cage 8 and the housing 5.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an electromagnetic shielding structure, is including the connecting plate that can overlap on the casing, the connecting plate is the frame form that has four sides, just one of them side of connecting plate is seted up the breach that supplies the casing to pass, its characterized in that: a plurality of finger-shaped elastic sheets are arranged along the edge of one end of the connecting plate, each elastic sheet extends in the direction away from the connecting plate, and a space is formed between every two adjacent elastic sheets on the same edge; each shell fragment all has the contained angle rather than the border that sets up, on every border, the terminal of every shell fragment shelters from the interval that forms between this adjacent shell fragment with the orthographic projection at border.
2. The electromagnetic shielding structure of claim 1, wherein: on each edge, the inclination directions of the elastic sheets are consistent.
3. The electromagnetic shielding structure of claim 2, wherein: on each edge, the size of each elastic sheet is equal, and the interval between every two adjacent elastic sheets is also equal.
4. The electromagnetic shielding structure of claim 1, wherein: encircle four sides of connecting plate, each on each border the shell fragment all sets up towards same direction slope.
5. The electromagnetic shielding structure of claim 1, wherein: the connecting plate is provided with a buckle which can be clamped into a corresponding clamping groove of the shell.
6. The electromagnetic shielding structure of claim 5, wherein: the buckle is arranged on the side face of the connecting plate with the notch.
7. The electromagnetic shielding structure of claim 6, wherein: the buckle is arranged on the edge of the side face with the notch at the notch, and the buckle bends towards the inside of the connecting plate.
8. An optical module, comprising a housing, characterized in that: the optical module further comprises the electromagnetic shielding structure according to any one of claims 1 to 7, wherein the connecting plate of the electromagnetic shielding structure is sleeved on the housing, and each elastic sheet extends towards the direction of the optical port of the optical module.
9. The optical module of claim 8, wherein: the position of the shell close to the optical port of the optical module sinks and sinks to form a groove for embedding the electromagnetic shielding structure.
10. The optical module of claim 8, wherein: still include the cage, the cage cover will when on the casing electromagnetic shield structure covers completely, each shell fragment is extruded to the contact the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858136.0A CN115201976B (en) | 2022-07-20 | 2022-07-20 | Electromagnetic shielding structure and optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858136.0A CN115201976B (en) | 2022-07-20 | 2022-07-20 | Electromagnetic shielding structure and optical module |
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| Publication Number | Publication Date |
|---|---|
| CN115201976A true CN115201976A (en) | 2022-10-18 |
| CN115201976B CN115201976B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210858136.0A Active CN115201976B (en) | 2022-07-20 | 2022-07-20 | Electromagnetic shielding structure and optical module |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031984A (en) * | 2001-07-18 | 2003-01-31 | Seiwa Electric Mfg Co Ltd | Gasket for electromagnetic shield |
| US20080047745A1 (en) * | 2006-08-28 | 2008-02-28 | David Christopher Smeltz | Flexible clip-on shielding and/or grounding strips |
| US20090260870A1 (en) * | 2008-04-22 | 2009-10-22 | International Business Machines Corporation | Adapter Card Electromagnetic Compatibility Shielding |
| JP2012037617A (en) * | 2010-08-04 | 2012-02-23 | Sumitomo Electric Ind Ltd | Optical module |
| CN105403964A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Pluggable optical module |
| CN107438784A (en) * | 2017-05-31 | 2017-12-05 | 索尔思光电（成都）有限公司 | Optical transceiver EMI shield and its manufacture method |
-
2022
- 2022-07-20 CN CN202210858136.0A patent/CN115201976B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031984A (en) * | 2001-07-18 | 2003-01-31 | Seiwa Electric Mfg Co Ltd | Gasket for electromagnetic shield |
| US20080047745A1 (en) * | 2006-08-28 | 2008-02-28 | David Christopher Smeltz | Flexible clip-on shielding and/or grounding strips |
| US20090260870A1 (en) * | 2008-04-22 | 2009-10-22 | International Business Machines Corporation | Adapter Card Electromagnetic Compatibility Shielding |
| JP2012037617A (en) * | 2010-08-04 | 2012-02-23 | Sumitomo Electric Ind Ltd | Optical module |
| CN105403964A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Pluggable optical module |
| CN107438784A (en) * | 2017-05-31 | 2017-12-05 | 索尔思光电（成都）有限公司 | Optical transceiver EMI shield and its manufacture method |
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| Publication number | Publication date |
|---|---|
| CN115201976B (en) | 2023-06-02 |
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