CN111596422A - An optical fiber connector potential fixing device for PCB board - Google Patents

Abstract

The invention provides a potential fixing device for an optical fiber connector for a PCB board. The potential fixing device (3) is an elastic hollow conductor; the potential fixing device (3) wraps the optical fiber connector (2) and the PCB. The connection part of the optical fiber transceiver (1) of the board; one end of the potential fixing device (3) is fixedly connected with the metal part of the optical fiber connector (2), and the other end is clamped on the PCB board under the action of elasticity on the metal shell; the invention effectively avoids the hidden trouble of the board card caused by the electrostatic accumulation in the EMC caused by the metal suspension of the optical fiber connector, and avoids the interference on the board caused by connecting the connector directly to the ground potential of the circuit board; and the solution of the invention The principle is simple, easy to implement, and has a very good effect on improving the reliability of high-potential boards.

Description

An optical fiber connector potential fixing device for PCB board

technical field

The invention relates to the technical field of DC power transmission and distribution, in particular to an optical fiber connector potential fixing device for a PCB board.

Background technique

As the medium of optical signal transmission in the modern communication field, the reliability of optical fiber is very important. For the high-speed communication industry, the bit error rate requirement is often below one millionth. In the conventional medium and low voltage application field, due to its friendly electromagnetic environment, the EMC environment has no particularly bad influence. Under the conventional bit error rate test conditions, such influences are not fully exposed. Therefore, the potential fixation of fiber optic connectors is often neglected. In the field of high-voltage power transmission applications, due to the sudden increase in the harshness of the electromagnetic environment, the fixed potential of the optical fiber connector has a great impact on the accuracy of optical fiber transmission.

There are usually two ways to fix the potential of conventional fiber optic connectors: way 1: fixed potential; way 2: floating potential.

The application condition of mode 1 is that the outer casing of the optical fiber connector is a metal connector, and the outer casing of the optical fiber transceiver also needs to have a metal part, and the potential of this part has been fixed, and the potential can be fixed by the contact between this part and the optical fiber connector. The second installation method is the same as the first one, the difference is that the outer casing of the optical fiber connector on the circuit board is made of plastic material, which does not have electrical conductivity, so it is equivalent to the metal part of the optical fiber connector showing a floating potential.

In the first method of fixing the joint potential, the potential of the optical fiber head is fixed on the ground potential of the circuit board. When the EMC test item is carried out on the circuit board, the electrostatic discharge immunity test will fail. During the test, it may cause The core chip of the circuit board frequently reports faults, resets and even crashes, which reduces the reliability of the circuit board; the potential processing method of method 2 will lead to the appearance of floating potential points, which will lead to floating potential points in the application of strong electromagnetic fields. The presence of induced charges, and the possible accumulation of static electricity. The induced charge causes the potential of the floating potential point to be unable to be evaluated, and an electric field is formed on the surrounding metal fixed potential point, and the surrounding electric field is disturbed.

For ordinary civilian low-voltage electrical products, the above two grounding or floating connection methods will not cause obvious interference to the operation of the secondary board, but for high-voltage application environments, the above two connection methods have obvious hidden dangers. At present, no better method for fixing the potential of the metal part of the optical fiber connector has been found.

SUMMARY OF THE INVENTION

In order to solve the above deficiencies in the prior art, the present invention provides a potential fixing device for an optical fiber connector for a PCB board, which connects the metal part of the optical fiber connector and the metal casing of the PCB board together.

The object of the present invention is to be achieved through the following technical solutions:

The invention provides a potential fixing device for an optical fiber connector for a PCB board card,

The potential fixing device (3) is an elastic hollow conductor;

The potential fixing device (3) wraps the connection part of the optical fiber connector (2) and the optical fiber transceiver (1) of the PCB board;

One end of the potential fixing device (3) is fixedly connected with the metal part of the optical fiber connector (2), and the other end is clamped on the metal shell of the PCB board under the action of elasticity.

Preferably, the material of the potential fixing device (3) is metal.

Preferably, the potential fixing device (3) is a spring-shaped metal wire.

Preferably, the metal casing of the PCB card is grounded.

Preferably, the potential fixing device (3) and the metal part of the optical fiber connector (2) are connected by welding or crimping.

Preferably, the optical fiber connector (2) adopts ST or FC optical fiber connector.

Preferably, the casing of the optical fiber transceiver (1) is an insulator.

Preferably, the insulator is plastic.

Preferably, the inner diameter of the spring-like metal wire is larger than the diameter of the port of the optical fiber transceiver (1).

The optical fiber connector (2) is pluggable and connected to the optical fiber transceiver (1) of the PCB board.

Compared with the closest prior art, the beneficial effects of the present invention are:

The invention provides a potential fixing device for an optical fiber connector for a PCB board. The potential fixing device (3) is an elastic hollow conductor; the potential fixing device (3) wraps the optical fiber connector (2) and the PCB. The connection part of the optical fiber transceiver (1) of the board; one end of the potential fixing device (3) is fixedly connected with the metal part of the optical fiber connector (2), and the other end is clamped on the PCB board under the action of elasticity on the metal shell; the invention effectively avoids the hidden trouble of the board card caused by the accumulation of static electricity in the EMC caused by the metal suspension of the optical fiber connector, and avoids the interference on the board caused by connecting the connector directly to the ground potential of the circuit board; and the scheme of the invention The principle is simple, easy to implement, and has a very good effect on improving the reliability of high-potential boards.

Description of drawings

Fig. 1: the schematic diagram of the optical fiber connector potential fixing device of the present invention;

Reference number:

1- Optical fiber transceiver, 2- Optical fiber connector, 3- Potential fixing device.

Detailed ways

In order to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

The present invention provides a potential fixing device for an optical fiber connector for a PCB board, as shown in FIG. 1 ,

The potential fixing device 3 is an elastic hollow conductor;

The potential fixing device 3 wraps the connection part of the optical fiber connector 2 and the optical fiber transceiver 1 of the PCB board;

One end of the potential fixing device 3 is fixedly connected with the metal part of the optical fiber connector 2, and the other end is clamped on the metal shell of the PCB board under the action of elasticity.

The potential fixing device 3 is made of metal.

The potential fixing device 3 is a spring-shaped metal wire.

The metal casing of the PCB card is grounded.

The potential fixing device 3 and the metal part of the optical fiber connector 2 are connected by welding or crimping.

The optical fiber connector 2 adopts ST or FC optical fiber connector.

The casing of the optical fiber transceiver 1 is an insulator.

The insulator is plastic.

The inner diameter of the spring-like wire is larger than the diameter of the port of the optical fiber transceiver 1 .

The optical fiber connector 2 is pluggable and connected to the optical fiber transceiver 1 of the PCB board.

Specifically: On the basis of the traditional optical fiber port metal shell, through welding, an elastic compressible ground wire is connected to the metal part of the optical fiber connector and the metal shell of the board is equipotentially connected. Usually, the metal shell of the board is It is connected with the basic potential (zero potential) of the application unit, avoiding the problem of unreliable operation of the board caused by the suspension of the optical fiber connector or the connection with the ground potential of the board. Especially in the flexible HVDC converter valve hall, the problem of unknown potential caused by strong electromagnetic environment can be completely avoided.

The invention proposed this time is to add an elastic pressure device composed of an elastic metal plate or a metal wire to the metal periphery of the optical fiber connector. After the experiment, the spring composed of metal wires has the best effect. One side of the spring is welded or crimped to the metal part of the optical fiber connector to achieve reliable potential fixation, and the other side relies on the optical fiber connector and the optical fiber transceiver to be inserted into the position. With the pressure of the spring, the spring can be reliably contacted with the metal part of the chassis to achieve reliable fixation of the potential. To achieve potential fixation in this way, plastic optical fiber transceivers should be used to prevent the potential of the optical fiber connector from being fixed to the PCB board, but to fix the potential to the chassis panel to ensure the EMC performance of the communication board.

The potential fixing method of the optical fiber connector effectively avoids the hidden trouble of the board card caused by the accumulation of static electricity in the EMC caused by the metal suspension of the fiber optic connector, and the interference to the board caused by connecting the connector directly to the ground potential of the circuit board. The solution is simple in principle, easy to implement, and has a very good effect on improving the reliability of high-potential boards. At present, no such optical fiber connector grounding method has been found.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above are only examples of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the application for pending approval of the present invention. within the scope of the claims.

Claims (10)

1. an optical fiber connector potential fixing device for PCB board, is characterized in that, described potential fixing device (3) is a hollow conductor with elasticity; The potential fixing device (3) wraps the connection part of the optical fiber connector (2) and the optical fiber transceiver (1) of the PCB board; One end of the potential fixing device (3) is fixedly connected with the metal part of the optical fiber connector (2), and the other end is clamped on the metal shell of the PCB board under the action of elasticity. 2 . The potential fixing device of an optical fiber connector for a PCB board according to claim 1 , wherein the potential fixing device ( 3 ) is made of metal. 3 . 3 . The potential fixing device for an optical fiber connector for a PCB board according to claim 2 , wherein the potential fixing device ( 3 ) is a spring-like metal wire. 4 . 4 . The potential fixing device for an optical fiber connector for a PCB board according to claim 1 , wherein the metal casing of the PCB board is grounded. 5 . 5. The potential fixing device for an optical fiber connector for a PCB board as claimed in claim 1, wherein the potential fixing device (3) and the metal part of the optical fiber connector (2) are welded or pressed. connection method. 6. An optical fiber connector potential fixing device for a PCB board according to claim 1, characterized in that, the optical fiber connector (2) adopts ST or FC optical fiber connector. 7. The device for fixing the potential of an optical fiber connector for a PCB board according to claim 1, wherein the casing of the optical fiber transceiver (1) is an insulator. 8 . The device for fixing the potential of an optical fiber connector for a PCB board according to claim 7 , wherein the insulator is plastic. 9 . 9. An optical fiber connector potential fixing device for a PCB board according to claim 3, characterized in that the inner diameter of the spring-shaped metal wire is larger than the diameter of the port of the optical fiber transceiver (1). 10. The optical fiber connector potential fixing device for a PCB board according to any one of claims 1-9, wherein the optical fiber connector (2) and the optical fiber transceiver (1) of the PCB board Plug-in connection.

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