CN216956452U - EMI shield and optical fiber switching module with same - Google Patents

Abstract

An EMI shield and fiber optic patching module having an EMI shield, the EMI shield comprising: the metal shielding body is provided with at least one accommodating hole, wherein the side edge of the metal shielding body is provided with a guide way, the guide way is communicated with the accommodating hole from the side edge of the metal shielding body, and the width of the guide way is smaller than the diameter of the accommodating hole. The utility model also provides an optical fiber switching module with the EMI shielding piece. The utility model solves the problems that the EMI shielding part of the optical fiber switching module is difficult to assemble, the protection effect is not good and the like.

Description

EMI shield and optical fiber switching module with same

Technical Field

The present invention relates to a fiber optic patching module, and more particularly, to an EMI shield and a fiber optic patching module having an EMI shield.

Background

The optical fiber switching module is a switching module for converting optical signals and electrical signals to each other. While the components related to the electrical signals are vulnerable to Electromagnetic Interference (EMI), the modules are covered with metal housings in various directions to protect the components from EMI. However, in the direction in which the electrical signal related component extends to the optical fiber (i.e., the optical port portion), the metal housing lacks effective protection, so that a shielding member perpendicular to the direction in which the optical fiber extends needs to be additionally provided.

The optical port portion of the current optical fiber patch module employs a shielding member having a through hole. The through hole allows the optical fiber insertion core (Stub) to pass through, so that the shielding member can penetrate through the optical fiber insertion core from the front end and is sleeved on the periphery of the optical fiber insertion core. However, the front end of the existing optical fiber ferrule is often connected with other optical devices, so that the front end of the optical fiber ferrule is large in size, and a shielding part is difficult to be sleeved from the front end; if the size of the through hole needs to be increased, the shielding part cannot be effectively matched with the optical fiber insertion core after being sleeved, and the actual EMI protection effect is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve various problems of the existing optical fiber adapter module and provides an EMI shielding piece, an optical fiber adapter module with the EMI shielding piece and an assembling method of the optical fiber adapter module.

To achieve the above and other objects, the present invention provides an EMI shield comprising: the metal shielding body is provided with at least one accommodating hole, wherein the side edge of the metal shielding body is provided with a guide channel, the guide channel is communicated with the accommodating hole from the side edge of the metal shielding body, and the width of the guide channel is smaller than the diameter of the accommodating hole.

Optionally, the number of the accommodating holes and the number of the guide channels are two, and the two guide channels correspond to the two accommodating holes respectively.

Optionally, the number of the accommodating holes is two, and the metal shielding body further has a secondary guide channel communicating the two accommodating holes.

Optionally, the metal shield further comprises at least one group of fastening blocks respectively disposed on two opposite sides of the metal shield.

Optionally, the fastening block includes an elastic arm extending from a side of the metal shield, and a fastening portion located at an end of the elastic arm, and the elastic arm is curved.

The present invention further provides an optical fiber adapter module, including: at least one fiber stub; at least one optical fiber, one end of which is inserted into the optical fiber inserting core; at least one ferrule sleeve connecting the optical fiber ferrules; and the EMI shielding piece comprises a metal shielding body, the metal shielding body is provided with at least one accommodating hole, the side edge of the metal shielding body is provided with a guide channel communicated with the accommodating hole from the side edge of the metal shielding body, the width of the guide channel is smaller than the diameter of the accommodating hole and allows the optical fiber to pass through, and the optical fiber insertion core is arranged in the accommodating hole in a penetrating manner.

Optionally, the optical fiber connector further comprises an optical fiber socket, the number of the optical fiber ferrule, the optical fiber, the ferrule sleeve and the accommodating hole is at least two, and the optical fiber socket is connected with the two optical fiber ferrules.

Optionally, the optical fiber connector further comprises a rear end portion of the socket, which is arranged on the periphery of the optical fiber ferrule.

Optionally, the optical fiber connector further comprises a socket hook connected with the optical fiber socket.

Therefore, the EMI shielding part can be embedded into the optical fiber insertion core from the side edge of the optical fiber, so that the EMI shielding part does not need to be matched with an optical fiber socket to increase the aperture of the accommodating hole, the assembly structure of the optical fiber switching module is improved, the EMI shielding part is easy to install, and the effective EMI protection performance with high coverage rate is achieved.

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the utility model and accompanying drawings, which are provided for illustration purposes only and are not intended to limit the scope of the utility model.

Drawings

FIG. 1 is a perspective view of an EMI shield according to an embodiment of the present invention;

FIG. 2 is a perspective view of an EMI shield according to another embodiment of the present invention;

FIG. 3 is an exploded view of a fiber optic patching module according to an embodiment of the present invention;

FIG. 4 is a first assembly view of a fiber optic patching module according to an embodiment of the present invention;

FIG. 5 is a second assembly view of a fiber optic patching module according to an embodiment of the present invention;

FIG. 6 is a third assembly view of a fiber optic patching module according to an embodiment of the present invention;

FIG. 7 is a partial cross-sectional view of a fiber optic patching module according to an embodiment of the present invention;

fig. 8 is a flowchart of an assembly method of a fiber optic patch module according to an embodiment of the utility model.

Reference numerals

100 optical fiber switching module

1 casing

11 base

12 upper cover

2 optical interface

21 transmitting end optical interface

22 receiving end optical interface

23 Circuit Board

3 optical fiber ferrule

4 optical fiber

5 inserting core sleeve

6 EMI shield

61 Metal shield

611 containing hole

612 guide way

613 auxiliary guide way

62 fastener

621 elastic arm

622 buckling part

6a EMI shield

7 optical fiber socket

8 socket rear end

9 socket hook

91 frame body

911 joint part

92 hook block

S101 to S103

Detailed Description

In order that the utility model may be fully understood, the utility model is described in detail by way of the following detailed description of specific embodiments, taken in conjunction with the accompanying drawings. The objects, features and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present specification. It is to be noted that the utility model may be practiced or applied in other specific embodiments, and that various modifications and changes may be made in the details within the description without departing from the spirit or scope of the utility model. The drawings of the present invention are for illustrative purposes only and are not drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the claims of the present invention. The description is as follows:

as shown in fig. 3, the fiber optic patch module 100 according to the embodiment of the present invention includes: the optical fiber module comprises a shell 1, an optical interface 2, at least two optical fiber ferrules 3, at least two optical fibers 4, at least two ferrule sleeves 5 and an EMI shielding piece 6.

The housing 1 includes a base 11 and a cover 12 for accommodating the remaining components of the fiber optic patch module 100, and the base 11 and the cover 12 are preferably metal or are inwardly faced with metal for EMI protection. The configuration of the housing 1 may be changed as desired.

The optical interface 2 is used for converting the optical signal transmitted by the optical fiber 4 into an electrical signal, or converting the electrical signal into an optical signal, and then transmitting the optical signal through the optical fiber 4. In the present embodiment, the optical interface 2 includes an Emitting-end optical interface 21 (connectable to a photodiode), a receiving-end optical interface 22 (connectable to a Vertical-Cavity Surface-Emitting Laser, VCSEL), and a circuit board 23. The transmitting end optical interface 21 and the receiving end optical interface 22 are respectively connected to the circuit board 23 and the optical fiber 4. The circuit board 23 extends rearward and may be signally connected to other external devices to receive or pass signals.

In fig. 3, a portion of the receptacle rear end 8 is removed to show the Fiber Stub 3(Fiber Stub). The contents of the receptacle rear end portion 8 will be described later. The optical fiber ferrule 3 is cylindrical and has a through hole at its axial center for accommodating the optical fiber 4. In this embodiment, the optical fiber ferrule 3 is made of a ceramic material, has good chemical stability, is wear-resistant, and is suitable for precision machining.

One end of the optical fiber 4 is inserted into the optical fiber ferrule 3.

The ferrule sleeve 5 connects the optical fiber ferrule 3 in the axial direction. Referring to fig. 7, the ferrule sleeve 5 can be supplied with another fiber ferrule to align the connecting fiber 4.

In fig. 3, a plurality of sets of fiber ferrules 3, fibers 4, and ferrule sleeves 5 are shown. Preferably, there is at least one set of the optical fiber ferrule 3, the optical fiber 4 and the ferrule sleeve 5 (two in number), and the set of optical fibers 4 are respectively connected to the transmitting end optical interface 21 and the receiving end optical interface 22 to respectively receive optical signals from the outside and transmit the optical signals out of the optical fiber adapter module 100. Four sets of the above-described configurations are shown in fig. 3, however the utility model is not limited thereto and the number of sets of components may vary and in the simplest state there may be only a single fiber ferrule 3, fiber 4 and ferrule sleeve 5 to fit the EMI shield 6.

Fig. 1 shows a detailed structure of the EMI shield 6. As shown in fig. 1, the EMI shield 6 includes a metal shield 61, and the metal shield 61 is provided with at least one receiving hole 611. The number of the accommodation holes 611 can be adjusted according to the number of the optical fiber ferrules 3/optical fibers 4 provided. The side edge of the metal shield 61 is provided with a guide passage 612, the guide passage 612 is communicated with the containing hole 611 from the side edge of the metal shield 61, the width of the guide passage 612 is smaller than the diameter of the containing hole 611 and allows the optical fiber 4 to pass through, and the optical fiber ferrule 3 penetrates through the containing hole.

Next, how to assemble the EMI shield 6 will be explained. The method for assembling the optical fiber adapter module 100 of the embodiment of the utility model comprises the following steps:

as shown in fig. 4 and 8, in step S101, the optical fiber 4 is made to enter the accommodating hole 611 from the guide channel 612 on the side of the metal shield 61 along the radial direction (as shown by the arrows on both sides in fig. 4) of the corresponding optical fiber ferrule 3. At this time, one end of the optical fiber 4 is already fixed to the transmitting end optical interface 21 or the receiving end optical interface 22 in advance, and the other end is connected to the optical fiber receptacle 7 or the receptacle hook 9 (the functions of the optical fiber receptacle 7 and the receptacle hook 9 will be described later), so that the EMI shield 6 is difficult to be inserted into the optical fiber 4 from both ends thereof. However, the metal shield 61 is provided with the guide channel 612 and the receiving hole 611 communicating with the guide channel 612, so that the metal shield 61 can be easily inserted from the side (radial direction) of the optical fiber 4.

Next, as shown in fig. 4 and 8, in step S102, the metal shield 61 is relatively moved in the axial direction of the fiber stub 3, and the fiber stub 3 with the receptacle rear end portion 8 is accommodated in the accommodation hole 611.

Therefore, the EMI shielding member 6 of the present invention can be embedded into the optical fiber ferrule 3 and the peripheral socket rear end portion 8 thereof from the side edge of the optical fiber 4, so that the EMI shielding member 6 can be directly installed into the optical fiber socket 7, thereby not only improving the assembly structure of the optical fiber adapter module 100, but also facilitating the installation of the EMI shielding member 6 and achieving the EMI protection performance with effective and high coverage rate.

In the present embodiment, as shown in fig. 1, one EMI shield 6 has four receiving holes 611 to match the two sets of fibers 4/fiber stubs 3. However, the present invention is not limited thereto, and one EMI shield 6 may have only two receiving holes 611 to match one set of optical fibers 4/optical fiber ferrules 3, or in the simplest state, one EMI shield 6 may have only a single receiving hole 611 for mounting a single optical fiber 4/optical fiber ferrule 3.

In the present embodiment, the number of the accommodating holes 611 and the number of the guiding channels 612 are in a one-to-one relationship, each accommodating hole 611 has its corresponding guiding channel 612, and when the number of the accommodating holes 611 and the number of the guiding channels 612 are two or four, two or four guiding channels 612 correspond to two or four accommodating holes 611, respectively. The opening position of the guide passage 612 is preferably the closest side of the containing hole 611.

However, the present invention is not limited thereto, and in another embodiment, as shown in fig. 2, a secondary guide channel 613 is further provided between each two receiving holes 611 in the metal shield 61 of the EMI shield 6a, and the secondary guide channel 613 communicates with the two receiving holes 611. Thus, each two receiving holes 611 may share one guide channel 612. Two optical fibers 4 enter the first containing hole 611 through the guiding channel 612, and one optical fiber 4 enters the second containing hole 611 through the secondary guiding channel 613. Based on similar concepts, the EMI shield may be further configured such that more (e.g., four, six, eight) receiving holes 611 share one guide channel 612 connected to the side, and the plurality of receiving holes 611 communicate with each other through the sub-guide channel 613, so as to allow the optical fiber to move into each receiving hole 611, respectively. In the embodiment of fig. 1, the guiding paths 612 are opened at the left and right sides of the metal shield 61; in the embodiment of fig. 2, the guiding passage 612 is opened at the lower side of the metal shield 61. However, the present invention is not limited thereto, and the position of the side of the guiding path 612 can be changed as required.

Further, as shown in fig. 1, the EMI shield 6 further includes at least one set of fastening blocks 62 respectively disposed on two opposite sides of the metal shield 61. The main function of the latch 62 is to latch to other optical devices so that the EMI shield 6 is firmly held in engagement with the fiber stub 3. Therefore, the installation position of the fastening block 62 needs to match the design of other optical devices, and the installation position of the guiding channel 612 avoids the installation position of the fastening block 62. For example, the fastening blocks 62 in fig. 1 are disposed on the upper and lower sides of the metal shield 61, and the guiding channels 612 are disposed on the left and right sides; the fastening blocks 62 shown in fig. 2 are disposed on the left and right sides of the metal shield 61, and the guiding path 612 is disposed on the lower side (alternatively, the upper side or the upper and lower sides).

Further, as shown in fig. 1 and 2, the fastening block 62 includes a resilient arm 621 extending from a side of the metal shield 61, and a fastening portion 622 located at an end of the resilient arm 621. The elastic arm 621 is curved, has a function of storing elastic potential energy, and can maintain parallel optical axes in the array in which the optical fiber ferrules 3 are arranged, thereby avoiding deviation caused by assembly tolerance and maintaining effective contact during switching. The fastening portion 622 is used for fastening to other optical devices, and in the embodiment, is in the form of a groove, but the utility model is not limited thereto.

Further, as shown in fig. 3-7, the fiber optic patching module 100 also includes a fiber optic receptacle 7. The number of the optical fiber ferrules 3, the optical fibers 4, the ferrule sleeves 5 and the accommodating holes 611 is at least two, and the optical fiber socket 7 is connected with the two optical fiber ferrules 3 and is used for fixing a group of optical fiber ferrules 3 and ferrule sleeves 5 to form an optical fiber array. Fig. 3 and 5 show an array of optical fibers formed by a plurality of fiber optic receptacles 7 side-by-side.

Further, as shown in fig. 3 to 7, the fiber transit module 100 further includes a receptacle rear end portion 8 disposed at the periphery of the fiber stub 3. The receiving hole 611 matches the outer diameter of the receptacle rear end 8. The receptacle rear end portion 8 is preferably made of metal (e.g., iron), and the receptacle rear end portion 8 covers most of the optical fiber ferrule 3 and fills the gap between the optical fiber ferrule 3 and the accommodating hole 611 to form a continuous shielding surface, thereby effectively further improving EMI protection.

Further, as shown in fig. 3 and 4, the fiber optic adapter module 100 further includes a receptacle hook 9 for connecting to the fiber optic receptacle 7. The socket hook 9 includes a frame 91 and a hook block 92 extending from the frame 91. The frame 91 is connected to one or more fiber optic receptacles 7, and the engaging portions 622 of the engaging blocks 62 are fixed to the connecting portions 911 on the surface of the frame 91. In the present embodiment, the bonding portion 911 is a convex point for matching and engaging with the groove-shaped engaging portion 622. However, the utility model is not limited thereto, the engaging portion 622 and the connecting portion 911 may have other shapes, and when the receptacle hook 9 is not present, the engaging portion 622 may be engaged with the fiber receptacle 7 or other optical device. The hook block 92 extends in the axial direction of the fiber stub 3, and can be used to fix another optical device with a fiber cable to be connected.

Therefore, further, the method for assembling the fiber optic patch module 100 according to the embodiment of the present invention may further include the following steps: in step S103, the fiber receptacle 7 is inserted into the receptacle hook 9 to complete the assembly.

The present invention has been disclosed in terms of preferred embodiments, however, it will be understood by those skilled in the art that the embodiments are illustrative only and should not be construed as limiting the scope of the utility model. It should be noted that all changes and substitutions equivalent to the described embodiments are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention is subject to the content defined by the claims.

Claims (9)

1. An EMI shield, comprising:

a metal shield body, wherein the metal shield body is provided with at least one accommodating hole,

the side edge of the metal shielding body is provided with a guide channel, the guide channel is communicated with the containing hole from the side edge of the metal shielding body, and the width of the guide channel is smaller than the diameter of the containing hole.

2. The EMI shield of claim 1, wherein the receiving apertures and the guide channels are two in number, the two guide channels corresponding to the two receiving apertures, respectively.

3. The EMI shield of claim 1, wherein the number of receiving apertures is two, and the metal shield further comprises a secondary guide channel communicating the two receiving apertures.

4. The EMI shield of any one of claims 1-3, further comprising at least one set of buttons disposed on opposite sides of the metal shield.

5. The EMI shield of claim 4, wherein the latch includes a spring arm extending from a side of the metal shield and a latch portion at a distal end of the spring arm, the spring arm being curved.

6. A fiber optic patching module, comprising:

at least one fiber stub;

one end of the optical fiber is inserted into the optical fiber inserting core;

at least one ferrule sleeve connecting the optical fiber ferrules; and

EMI shielding spare, including the metal shielding body, the metal shielding body has seted up at least one and has held the hole, the side of metal shielding body seted up certainly the side intercommunication of metal shielding body the guide way in holding the hole, the width of guide way is less than the diameter in holding the hole and allow optic fibre passes through, the optic fibre lock pin wear to locate hold the hole.

7. The fiber optic transition module of claim 6, further comprising a fiber optic receptacle, wherein the number of the fiber stubs, the optical fibers, the stub sleeve and the receiving hole is at least two, and wherein the fiber optic receptacle connects the two fiber stubs.

8. The fiber optic transition module of claim 7, further comprising a receptacle rear end disposed about the fiber stub.

9. The fiber optic patch module of claim 7, further comprising receptacle hooks that engage the fiber optic receptacles.

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