CN115201976B - Electromagnetic shielding structure and optical module - Google Patents
Electromagnetic shielding structure and optical module Download PDFInfo
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- CN115201976B CN115201976B CN202210858136.0A CN202210858136A CN115201976B CN 115201976 B CN115201976 B CN 115201976B CN 202210858136 A CN202210858136 A CN 202210858136A CN 115201976 B CN115201976 B CN 115201976B
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- electromagnetic shielding
- connecting plate
- shielding structure
- elastic sheet
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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 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 pieces are arranged along the edge of one end of the connecting plate, each elastic piece extends towards the direction away from the connecting plate, and a space is reserved between two adjacent elastic pieces positioned 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 and the edge of each elastic sheet shields the interval formed between the adjacent elastic sheet. The optical module comprises the electromagnetic shielding structure. Compared with the traditional elastic sheet which is arranged vertically relative to the edge, the gap can be eliminated in the electromagnetic wave leakage direction by the elastic sheet which is arranged obliquely relative to the edge, 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 specification of the optical module industry protocol MSA, the optical module has the characteristic of hot plug, namely, the optical module can be connected or disconnected with equipment under the condition of not shutting down the power supply of the equipment. There is a need for a light module that can be repeatedly plugged into a device, typically in a pluggable mounting cage on the device. In order to ensure that the optical module is easy to operate in plugging and unplugging, the requirement on the manufacturing size precision of parts is low, and a certain gap is reserved between the optical module and the mounting cage.
Because the photoelectric and electro-optical conversion circuits inside the optical modules are particularly easy to generate out-of-standard EMI (electromagnetic radiation), and a plurality of optical modules can work simultaneously on the equipment, the EMI leakage is required to be greatly reduced to meet the electromagnetic compatibility safety specification. Since there is a gap between the optical module and the mounting cage, which is typically a critical path for EMI leakage inside the device as well as inside the optical module, it is desirable to eliminate this 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 embodiment of the present invention provides the following technical solutions: the utility model provides an electromagnetic shield structure, includes 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 has seted up the breach that supplies the casing to pass, its characterized in that: a plurality of finger-shaped elastic pieces are arranged along the edge of one end of the connecting plate, each elastic piece extends towards the direction away from the connecting plate, and a space is reserved between two adjacent elastic pieces positioned 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 and the edge of each elastic sheet shields the interval formed between the adjacent elastic sheet.
Further, on each edge, the inclination direction of each elastic sheet is consistent.
Further, on each edge, the size of each elastic sheet is equal and the interval between two adjacent elastic sheets is also equal.
Further, the four sides of the connecting plate are surrounded, and the elastic pieces on each edge are obliquely arranged towards the same direction.
Further, 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 surface of the connecting plate with the notch.
Further, the buckle is arranged on the edge of the side surface with the notch at the notch, and the buckle is bent towards the inside of the connecting plate.
The embodiment of the invention provides another technical scheme that: the 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 the elastic sheets extend towards the direction of the optical port of the optical module.
Further, the housing is sunk and sunken to form a groove for embedding the electromagnetic shielding structure at a position close to the optical port of the optical module.
Further, the electromagnetic shielding structure is completely covered when the cage is sleeved on the shell, and each elastic piece is extruded to be in contact with the shell.
Compared with the prior art, the invention has the beneficial effects that:
1. through the shell fragment of design for the slope setting of border, compare in the current shell fragment that sets up perpendicularly for the border, can eliminate the gap in electromagnetic wave leakage direction, play electromagnetic shield effect.
2. Compared with the prior art that the gap is eliminated by adding the part or greatly changed, the electromagnetic shielding structure only makes a certain inclination angle to the extending direction of the conventional elastic sheet, has low manufacturing cost and small change, and does not occupy the space of the 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 view of the first view of FIG. 1;
FIG. 4 is a schematic view of the second view of FIG. 1;
FIG. 5 is a schematic view of FIG. 2 at a first viewing angle;
FIG. 6 is a schematic diagram of the second view angle of FIG. 2;
fig. 7 is a schematic diagram of an optical module (without a cage and an electromagnetic shielding structure) according to an embodiment of the present invention;
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 after being nested (the cage does not fully encase the housing);
in the reference numerals: 1-connecting plates; 2-shrapnel; 3-notch; 4-interval; 5-a housing; 6-clamping grooves; 7-clamping buckles; 8-cage; 9-grooves; a-site; b-slit; 10-electromagnetic shielding structure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, 3, 4, 7, 8 and 9, an embodiment of the present invention provides an electromagnetic shielding structure, which includes a connecting plate 1 sleeved on a housing 5, wherein the connecting plate 1 has a frame shape with four sides, and one side of the connecting plate 1 is provided with a notch 3 through which the housing 5 passes, and the electromagnetic shielding structure is characterized in that: a plurality of finger-shaped elastic pieces 2 are arranged along the edge of one end of the connecting plate 1, each elastic piece 2 extends in the direction away from the connecting plate 1, and a space 4 is arranged between two adjacent elastic pieces 2 positioned on the same edge; each elastic sheet 2 has an included angle with the edge arranged on the elastic sheet, and on each edge, the orthographic projection of the tail end and the edge of each elastic sheet 2 shields a space 4 formed between the adjacent elastic sheet 2. In this embodiment, through the shell fragment 2 of design for the slope setting of border, compare with the shell fragment 2 of current for the perpendicular setting of border, can eliminate gap B in the electromagnetic wave leakage direction, play electromagnetic shielding effect. In fig. 5, since the spring plate 2 is arranged perpendicular to the edge, electromagnetic waves coming from the light port can directly leak through the slit B, resulting in a certain degree of EMI leakage, and the overall shielding performance is not very good, while in this embodiment, the spring plate 2 is inclined, so that the front projection of the end and the edge of the spring plate 2 shields the space 4 formed between the adjacent spring plate 2, specifically, as shown in fig. 3, the part a is dotted and hangs down to the edge, and the projection of the part a can just cover the space 4, thus blocking the slit B, and since the spring plate 2 extends towards the direction of the light port, the electromagnetic waves coming from the light port can be blocked by the end of the spring plate 2, thereby playing the shielding effect.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1, 3, 4, 7, 8 and 9, on each edge, the inclination directions of the spring plates 2 are identical. 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. The elastic pieces 2 on each edge are obliquely arranged towards the same direction around the four side surfaces of the connecting plate 1. In the present embodiment, the angle of inclination of the elastic sheet 2 is related to the length of the elastic sheet 2, including the number of the elastic sheets 2, as long as the front projection of the end of the elastic sheet 2 can be ensured to block the space 4, which is not limited in the present embodiment. 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 optimization scheme of the embodiment of the present invention, referring to fig. 1, 3, 4, 7, 8 and 9, the connecting plate 1 is provided with a buckle 7 that can be snapped into a corresponding clip groove 6 of the housing 5. In this embodiment, after the electromagnetic shielding structure 10 is sleeved on the housing 5, the electromagnetic shielding structure may be fixed on the housing 5 by means of a fastening 7. Preferably, the catch 7 is provided on the side of the connection plate 1 having the notch 3. The buckle 7 is arranged on the edge of the side surface with the notch 3 at the notch 3, and the buckle 7 is bent towards the inside of the connecting plate 1. Is arranged at the notch 3, and a groove 9 corresponding to the notch is conveniently formed on the shell 5. Two buckles 7 can be arranged, and two clamping grooves 6 are correspondingly arranged on the shell 5, so that the buckles 7 can be conveniently clamped into connection.
Referring to fig. 1, 3, 4, 7, 8 and 9, an optical module is provided according to an embodiment of the present invention, which includes a housing 5 and the electromagnetic shielding structure 10 described above, the connection board 1 of the electromagnetic shielding structure 10 is sleeved on the housing 5, and each of the elastic pieces 2 extends toward the optical port of the optical module. In this embodiment, the electromagnetic shielding structure 10 is applied to the optical module, so that the traditional electromagnetic shielding structure 10 can be directly replaced, and the cost of replacing the optical module of an enterprise is saved. Compared with the existing elastic sheet 2 which is vertically arranged relative to the edge, the electromagnetic shielding structure 10 can eliminate the gap B in the electromagnetic wave leakage direction and has an electromagnetic shielding effect through the elastic sheet 2 which is obliquely arranged relative to the edge. In fig. 5, since the spring plate 2 is arranged perpendicular to the edge, electromagnetic waves coming from the light port can directly leak through the slit B, resulting in a certain degree of EMI leakage, and the overall shielding performance is not very good, while in this embodiment, the spring plate 2 is inclined, so that the front projection of the end and the edge of the spring plate 2 shields the space 4 formed between the adjacent spring plate 2, specifically, as shown in fig. 3, the part a is dotted and hangs down to the edge, and the projection of the part a can just cover the space 4, thus blocking the slit B, and since the spring plate 2 extends towards the direction of the light port, the electromagnetic waves coming from the light port can be blocked by the end of the spring plate 2, thereby playing the shielding effect.
As an optimization scheme of the embodiment of the present invention, referring to fig. 1, 3, 4, 7, 8 and 9, the housing 5 is sunk and recessed near the optical port of the optical module to form a groove 9 into which the electromagnetic shielding structure 10 is embedded. In this embodiment, the recess 9 may be formed on the upper surface of the housing 5 by sinking, so that the electromagnetic shielding structure 10 is conveniently embedded, and the space of the optical module is not occupied.
As an optimization scheme of the embodiment of the present invention, referring to fig. 1, 3, 4, 7, 8 and 9, the optical module further includes a cage 8, where the electromagnetic shielding structure 10 is completely covered when the cage 8 is sleeved on the housing 5, and each elastic sheet 2 is pressed to contact with 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 light port from leaking from the slit B to the space between the cage 8 and the housing 5.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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 shield structure, includes 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 has seted up the breach that supplies the casing to pass, its characterized in that: a plurality of finger-shaped elastic pieces are arranged along the edge of one end of the connecting plate, each elastic piece extends towards the direction away from the connecting plate, and a space is reserved between two adjacent elastic pieces positioned 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 and the edge of each elastic sheet shields the interval formed between the adjacent elastic sheet.
2. The electromagnetic shielding structure of claim 1, wherein: on each edge, the inclination direction of each elastic sheet is 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 two adjacent elastic sheets is also equal.
4. The electromagnetic shielding structure of claim 1, wherein: the four sides of the connecting plate are surrounded, and the elastic sheets on the edges are obliquely arranged in the same direction.
5. The electromagnetic shielding structure of claim 1, wherein: the connecting plate is provided with a buckle which can be clamped into a clamping groove corresponding to the shell.
6. The electromagnetic shielding structure of claim 5, wherein: the buckle is arranged on the side surface of the connecting plate, which is provided with the notch.
7. The electromagnetic shielding structure of claim 6, wherein: the buckle is arranged on the edge of the side surface with the notch at the notch, and the buckle is bent towards the inside of the connecting plate.
8. An optical module comprising a housing, characterized in that: the electromagnetic shielding structure of any one of claims 1-7 is further included, the connecting plate of the electromagnetic shielding structure is sleeved on the shell, and each elastic sheet extends towards the direction of the light port of the light module.
9. An optical module as recited in claim 8, wherein: the shell is sunken to form a groove for embedding the electromagnetic shielding structure at a position close to the optical port of the optical module.
10. An optical module as recited in claim 8, wherein: the electromagnetic shielding structure is completely covered when the cage is sleeved on the shell, and each elastic sheet is extruded to be in contact with the shell.
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 CN115201976A (en) | 2022-10-18 |
| CN115201976B true CN115201976B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210858136.0A Active CN115201976B (en) | 2022-07-20 | 2022-07-20 | Electromagnetic shielding structure and optical module |
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| Country | Link |
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| CN (1) | CN115201976B (en) |
Citations (4)
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080047745A1 (en) * | 2006-08-28 | 2008-02-28 | David Christopher Smeltz | Flexible clip-on shielding and/or grounding strips |
| US7659482B2 (en) * | 2008-04-22 | 2010-02-09 | International Business Machines Corporation | Adapter card electromagnetic compatibility shielding |
-
2022
- 2022-07-20 CN CN202210858136.0A patent/CN115201976B/en active Active
Patent Citations (4)
| 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 |
| 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 |
|---|---|
| CN115201976A (en) | 2022-10-18 |
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