CN219574427U

CN219574427U - Electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment

Info

Publication number: CN219574427U
Application number: CN202320525136.9U
Authority: CN
Inventors: 方颖佳; 丁惠兵; 秦闪亮; 张�杰; 王小梅; 冯子滕
Original assignee: Shenzhen Dongsheng Data Co ltd
Current assignee: Shenzhen Dongsheng Data Co ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-08-22
Anticipated expiration: 2033-03-10

Abstract

The utility model discloses an electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment, which comprises a bottom plate, a left side plate, a right side plate, a front panel, a rear panel and a cover plate which are mutually spliced, wherein the edges of the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate are respectively provided with L-shaped clamping tables for splicing; a PCB board, a built-in power supply, a filter and a cooling fan are sequentially arranged on the bottom board along the direction from the front panel to the rear panel, a plurality of optical module cages are arranged on the PCB board, an optical module is arranged on each optical module cage, a plurality of optical fiber wire through holes are formed in the front panel, optical fiber wires are connected with the optical modules, and the diameters of the optical fiber wire through holes are smaller than the thickness of the front panel; the rear panel is provided with a key switch, a signal interface and a power interface; the rear panel is also provided with a plurality of vent holes corresponding to the cooling fans, and the diameter of the vent holes is smaller than the thickness of the rear panel. The technical scheme of the utility model solves the problems of complex shielding structure, high cost and instability of the conventional communication equipment.

Description

Electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment

Technical Field

The utility model relates to the technical field of communication, in particular to an electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment.

Background

In a conventional communication electronic device, a plurality of vent holes for penetrating and discharging interfaces such as an optical port line, an electrical port line, a power line and the like and for heat dissipation are usually formed in the device, and meanwhile, the device is formed by combining a plurality of parts, so that the joint of each part is inevitably leaked. The reinforced equipment has higher electromagnetic compatibility requirement, and how to restrain electromagnetic energy from leaking from the factors becomes the key of electromagnetic compatibility design. In order to improve the electromagnetic compatibility of the equipment, in the structural design stage, an electromagnetic interference source, a coupling path and an sensitization piece are started, and a proper design method and design measures are adopted at an interface and a joint to meet the requirement of a user on the electromagnetic compatibility.

At present, most of equipment interfaces with high electromagnetic compatibility requirements are shielded by using a aviation plug, the aviation plug connects an optical port line, an electric port line, a power line and the like in equipment out of a panel, and the aviation plug is sealed by using a metal shell to form a continuous conductive sealing interface, so that the device has a good effect of preventing internal electromagnetic radiation and resisting external electromagnetic field interference. Most of the optical interface plugs on the market can meet the requirement of 100M/1000M/10G speed, but the optical interfaces with high speed such as 100G/400G speed and above are not formed stably. Because the 100G/400G rate and above air plugs have complicated SerDes interfaces, the number of required optical fiber cores is increased, the cost index is increased, and the air plugs are basically not used by people in the market, so that the conventional communication equipment has the following defects:

1. at present, it is difficult to find an aviation plug meeting the output of an optical fiber with the speed of 100G or 400G in the market;

2. the cost of the aviation plug is high, the cost of the aviation plug used is about several times of the cost of the whole machine of a common switch, and the aviation plug is difficult to accept by customers;

3. for high-capacity equipment, such as 32T or 64T equipment, the number of optical ports is large, and the size of a single aviation plug is larger, so that the design size requirement cannot be met;

4. after the panel side is provided with too many aviation plugs, ventilation channels in the equipment are easily blocked, so that the heat dissipation effect of key devices in the equipment is poor, the temperature of the equipment is too high, the equipment is unstable, and faults frequently occur.

Disclosure of Invention

The utility model provides an electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment, which solves the problems of complex shielding structure, high cost and instability of the conventional communication equipment.

The embodiment of the utility model provides an electromagnetic shielding structure of high-capacity high-speed optical interface communication equipment, which comprises a main shell, wherein the main shell comprises a bottom plate, a left side plate, a right side plate, a front panel, a rear panel and a cover plate which are mutually spliced, and the edges of the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate are respectively provided with an L-shaped clamping table for splicing;

a PCB (printed circuit board), a built-in power supply, a filter and a radiator fan are sequentially arranged on the bottom plate along the direction from the front panel to the rear panel, a plurality of optical module cages are arranged on the PCB, an optical module is arranged on each optical module cage, a plurality of optical fiber wire through holes are formed in the front panel, optical fiber wires are connected with the optical modules, and the diameters of the optical fiber wire through holes are smaller than the thickness of the front panel; the rear panel is provided with a key switch, a signal interface and a power interface; and the rear panel is also provided with a plurality of vent holes corresponding to the cooling fans, and the diameter of each vent hole is smaller than the thickness of the rear panel.

In some embodiments, the splice between the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate is further provided with conductive foam.

In some embodiments, the fiber optic line via is configured in an elliptical configuration, the fiber optic line via having a diameter greater than a diameter of the fiber optic line.

In some embodiments, the fiber optic line is configured as a passive fiber optic line.

In some embodiments, the power interface is used for installing a power aviation plug interface, and a power cord connected with the power aviation plug interface is introduced through a power filter.

In some embodiments, the signal interface is configured as a super-six type RJ45 shielded jack, and the signal control line to which the signal interface is connected is configured as a super-six type shielded line.

In some embodiments, the key switch is configured as a metal key switch.

In some embodiments, the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate are respectively arranged as an aluminum alloy plate integrated structure.

In some embodiments, the PCB board edge is provided with a copper foil.

In some embodiments, the front and rear panels are hinged at both ends to the left and right side panels, respectively.

Compared with the prior art, the utility model has the beneficial effects that: the passive optical fiber line is directly connected with the panel, so that the problem of difficulty in market purchase is solved;

the number of aviation plugs is greatly reduced, and compared with the same type of equipment using the aviation plugs, the cost is reduced by about 50% -90%;

the structural design is optimized, an elliptic optical fiber wire through hole is adopted to replace an aviation plug, and the design size requirement is met;

the size of the panel interface is reduced, the ventilation area is greatly increased, and the heat dissipation problem is optimized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a communication device according to the present utility model;

FIG. 2 is a schematic diagram showing the internal layout of the communication device according to the present utility model;

FIG. 3 is a schematic view of the front panel structure of the present utility model;

FIG. 4 is a schematic view of the rear panel structure of the present utility model;

FIG. 5 is a cross-sectional view of the floor, cover and front panel mounting structure of the present utility model;

FIG. 6 is a cross-sectional view of the mounting structure of the bottom plate, cover plate and right side plate of the present utility model;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

It should be noted that, in the existing common structure, the casing represented by stainless steel or aluminum casting mould has the problems of inconvenient structure assembly, interconnection of a plurality of accessories and overlarge gap, and electromagnetic leakage is easy to cause. According to EMC tests of GJB 151B-2013 military equipment and subsystem electromagnetic emission and sensitivity requirements and measurements, the shielding effect is greatly reduced by the slender gap and the open opening on the electromagnetic shielding body. All external slots in the chassis structure are continuous and have good conductive contact to properly handle the various openings of the equipment and to properly select and install the equipment connectors. Whereas for small holes with a diameter smaller than the thickness of the shielding device, there is generally no concern about affecting the EMC effect.

Therefore, referring to fig. 1 and 2, the electromagnetic shielding structure of the high-capacity high-speed optical interface communication device provided in this embodiment includes a main housing, where the main housing includes a bottom plate 11, a left side plate 12, a right side plate 13, a front panel 14, a rear panel 15, and a cover plate 16 that are spliced with each other, and referring to fig. 1, 2, 5, and 6, edges of the bottom plate 11, the left side plate 12, the right side plate 13, the front panel 14, the rear panel 15, and the cover plate 16 are respectively provided with an L-shaped clamping table 17 for splicing;

in this embodiment, the bottom plate 11, the left side plate 12, the right side plate 13, the front panel 14, the rear panel 15 and the cover plate 16 are respectively configured as an aluminum alloy plate integrated structure, the edges for splicing are respectively provided with mutually anastomotic L-shaped clamping tables 17, after each plate is spliced into a main body shell, the spliced position inside the main body shell forms a completely closed dead angle to form a radiation reflection area, the electromagnetic field cannot radiate outwards and is reflected back into the equipment, so that the electromagnetic field is prevented from leaking outwards, and meanwhile, the external magnetic field interference can be prevented.

Further, conductive foam is additionally arranged at the joint between the bottom plate 11, the left side plate 12, the right side plate 13, the front panel 14, the rear panel 15 and the cover plate 16, so that the contact area between the plates is increased, gaps are greatly reduced, a radiation shielding surface is formed, and electromagnetic field radiation is shielded inside the device.

Referring to fig. 2 and 3, the base plate 11 is sequentially provided with a PCB 21, a built-in power supply 22, a filter 23 and a cooling fan 24 along the direction from the front panel 14 to the rear panel 15, the PCB 21 is provided with a plurality of optical module cages 25, the optical module cages 25 are provided with optical modules 26, the front panel 14 is provided with a plurality of optical fiber wire through holes 27, the optical fiber wires are connected with the optical modules 26, and the diameter of the optical fiber wire through holes 27 is smaller than the thickness of the front panel 14;

in this embodiment, the optical module 26 is inserted into the optical module cage 25 on the inner PCB 21, and the high-speed signal is connected to the optical fiber line through the optical module 26 and then transmitted to the outside through the optical fiber line via hole 27 of the front panel 14. Specifically, the fiber wire via hole 27 is configured as an oval structure, the diameter of the fiber wire via hole 27 is smaller than the thickness of the front panel 14, the diameter of the fiber wire via hole 27 is larger than the diameter of the fiber wire, and the diameter of the opening is smaller than the thickness of the front panel 14 on the basis that the fiber wire via hole 27 meets the installation of the fiber wire, so that the electromagnetic field can be prevented from radiating outwards.

Referring to fig. 4, the rear panel 15 is provided with a key switch 28, a signal interface 29 and a power interface 210; the rear panel 15 is further provided with a plurality of ventilation holes 211 corresponding to the cooling fans 24, and the diameter of the ventilation holes 211 is smaller than the thickness of the rear panel 15. In this embodiment, the diameter of the vent hole 211 is also smaller than the thickness of the rear panel 15, and the electromagnetic field is also prevented from radiating outward.

Furthermore, the optical fiber wire is arranged as a passive optical fiber wire, so that the optical fiber input aviation plug with the speed of 100G or higher is not needed while the electromagnetic leakage risk is avoided, the cost is reduced, and the structure is simplified.

Further, the power interface 210 is used for installing a power aviation plug interface, and a power line connected with the power aviation plug interface is introduced through the power filter 23; the power supply avionics plug interface uses an aluminum alloy closed opposite-plug structure, and has a high-strength shielding effect. The power line is led into the device through a power filter 23, the filter 23 is arranged at the inlet of the power line, and the filter 23 has good shielding power effect.

Further, the signal interface 29 is set to be an RJ45 shielding socket of more than six types, and the signal control line connected with the signal interface 29 is set to be a shielding line of more than six types, so that the shielding effect is further improved.

Further, the key switch 28 is configured as a metal key switch 28; a metal push button switch 28 is mounted over the back panel 15 and maintains the switch in good contact with the back panel 15, continuously conducting electricity, preventing electromagnetic energy from leaking through the switch.

Further, copper foil is arranged at the edge of the PCB 21, so that shielding and anti-interference effects are improved.

Further, the rear panel 15 is additionally provided with a grounding screw, and the grounding screw made of copper is used for grounding correctly, so that mutual interference between digital signals and analog signals and the ground is reduced.

Further, the two ends of the front panel 14 and the rear panel 15 are respectively hinged to the left side plate 12 and the right side plate 13, so that the front panel 14 is conveniently opened, the position of the optical module 26 is observed, and maintenance and overhaul of the optical module 26 and the optical fiber line are conveniently performed.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The electromagnetic shielding structure of the high-capacity high-speed optical interface communication equipment is characterized by comprising a main shell, wherein the main shell comprises a bottom plate, a left side plate, a right side plate, a front panel, a rear panel and a cover plate which are mutually spliced, and L-shaped clamping tables used for splicing are respectively arranged at the edges of the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate;

2. The electromagnetic shielding structure of the high-capacity high-speed optical interface communication device according to claim 1, wherein conductive foam is additionally arranged at the joint between the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate.

3. The electromagnetic shielding structure of the high capacity high speed optical interface communication device as claimed in claim 1, wherein the optical fiber line via is provided in an elliptical configuration, and the diameter of the optical fiber line via is larger than the diameter of the optical fiber line.

4. The electromagnetic shielding structure of the high capacity high rate optical interface communication device as claimed in claim 1, wherein the optical fiber line is provided as a passive optical fiber line.

5. The electromagnetic shielding structure of a high capacity high rate optical interface communication device as claimed in claim 1, wherein said power interface is adapted to mount a power aviation plug interface, and wherein a power cord to which said power aviation plug interface is connected is introduced through a power filter.

6. The electromagnetic shielding structure of the high-capacity high-speed optical interface communication device according to claim 1, wherein the signal interface is configured as an RJ45 shielding socket of more than six types, and the signal control line connected with the signal interface is configured as a shielding line of more than six types.

7. The electromagnetic shielding structure of a high capacity high rate optical interface communication device as claimed in claim 1, wherein said key switch is configured as a metal key switch.

8. The electromagnetic shielding structure of the high-capacity high-rate optical interface communication apparatus according to claim 1, wherein the bottom plate, the left side plate, the right side plate, the front panel, the rear panel, and the cover plate are respectively provided as an aluminum alloy plate integrated structure.

9. The electromagnetic shielding structure of the high capacity high rate optical interface communication device as claimed in claim 1, wherein the PCB board is provided with a copper foil at an edge thereof.

10. The electromagnetic shielding structure of the high capacity high rate optical interface communication apparatus as claimed in claim 1, wherein both ends of the front panel and the rear panel are hinged to the left side plate and the right side plate, respectively.