TWI790125B - EMI shield, fiber optic transition module with EMI shield, and method for assembling the fiber optic transition module - Google Patents

Abstract

An EMI shielding piece, comprising: a metal shielding body, the metal shielding body is provided with at least one accommodating hole, wherein one side of the metal shielding body is provided with a guide channel, and the guide channel communicates with the side edge of the metal shielding body In the accommodating hole, the width of the guiding path is smaller than the diameter of the accommodating hole. The present invention also proposes an optical fiber transition module with the aforementioned EMI shielding member and an assembly method of the optical fiber transition module. The invention solves the problems that the EMI shielding part of the optical fiber transfer module is difficult to assemble, the protection effect is not good, and the like.

Description

EMI shields, fiber optic transition modules with EMI shields, and fiber optics How to assemble the adapter module

The present invention relates to an optical fiber transfer module, more particularly to an EMI shield, an optical fiber transfer module with the EMI shield and an assembly method for the optical fiber transfer module.

The optical fiber conversion module is a conversion module that converts optical signals and electrical signals. The components related to electrical signals are afraid of being subjected to Electromagnetic Interference (EMI), so multiple directions of the module are covered with metal casings to protect the components from EMI damage. However, there is no metal casing for effective protection in the direction where the electrical signal-related components lead to the optical fiber (ie, the optical port), so an additional shielding member perpendicular to the optical fiber extension direction needs to be provided.

The optical port of the current optical fiber conversion module adopts a shielding member with a through hole. The through hole allows the fiber stub to pass through, so that the shielding member can pass through the fiber stub from the front end and be sleeved on the periphery of the fiber stub. However, the front end of the current fiber optic ferrule is often connected to other optical devices, making the front end of the fiber ferrule large in size, and it is difficult to insert the shield from the front end; if the size of the through hole is to be increased, the shield cannot be inserted into the fiber ferrule Effective fit, and the actual EMI protection effect is also greatly reduced.

Therefore, in order to solve various problems of the conventional optical fiber adapter module, the present invention provides an EMI shield, an optical fiber adapter module with the EMI shield, and an assembly method of the optical fiber adapter module.

In order to achieve the above purpose and other purposes, the present invention proposes an EMI shielding member, which includes: a metal shielding body, the metal shielding body is provided with at least one accommodating hole, wherein one side of the metal shielding body is provided with a guide Road, the guide road communicates with the accommodating hole from the side of the metal shield, and the width of the guide road is smaller than the diameter of the accommodating hole.

In one embodiment of the present invention, the number of the receiving hole and the guiding channel is two, and the two guiding channels correspond to the two receiving holes respectively.

In one embodiment of the present invention, the number of the receiving holes is two, and the metal shielding body further has a secondary guiding channel, which communicates with the two receiving holes.

In one embodiment of the present invention, it further includes a set of buckle blocks respectively disposed on two opposite sides of the metal shield, and the set of buckle blocks and the guideway are located on different sides of the metal shield.

In an embodiment of the present invention, the buckle block includes an elastic arm extending from the side of the metal shield, and a fastening portion at the end of the elastic arm, and the elastic arm is curved.

The present invention further proposes an optical fiber conversion module, which includes: at least one optical fiber ferrule; at least one optical fiber, one end of which is inserted into the optical fiber ferrule; at least one ferrule sleeve connected to the optical fiber ferrule; and An EMI shielding piece includes a metal shielding body, the metal shielding body is provided with at least one accommodation hole, and one side of the metal shielding body is provided with a guide leading from the side edge of the metal shielding body to the accommodation hole The guiding channel has a width smaller than the diameter of the accommodating hole and allows the optical fiber to pass through, and the optical fiber ferrule is passed through the accommodating hole.

In one embodiment of the present invention, a fiber optic socket is further included, the number of the fiber optic ferrule, the optical fiber, the ferrule sleeve and the receiving hole is at least two, and the fiber optic socket is connected to two of the fiber optic ferrules.

In one embodiment of the present invention, it further includes a socket rear end disposed on the periphery of the optical fiber ferrule.

In one embodiment of the present invention, it further includes a socket hook connected to the optical fiber socket.

The present invention also proposes a method for assembling an optical fiber conversion module, which includes the following steps: making an optical fiber enter a receiving hole from a guide path on the side of a metal shielding body along the radial direction of the optical fiber ferrule of the optical fiber and make the metal shield relatively move along the axial direction of the fiber optic ferrule, so that the fiber optic ferrule is accommodated in the accommodating hole.

Thereby, the EMI shielding part of the present invention can be embedded in the fiber ferrule from the side of the optical fiber, so that the EMI shielding part does not need to cooperate with the optical fiber socket to increase the aperture of the accommodation hole, which not only improves the assembly structure of the optical fiber conversion module , It also makes EMI shielding easy to install and achieves effective, high-coverage EMI protection performance.

100: Optical fiber adapter module

1: shell

11: base

12: Upper cover

2: Optical interface

21: Transmitter optical interface

22: Receiver optical interface

23: Circuit board

3: Fiber ferrule

4: Optical fiber

5: Ferrule sleeve

6: EMI shielding

61: metal shield

611: accommodating hole

612: Guidance Road

613: Auxiliary guideway

62: buckle block

621: elastic arm

622: fastening part

6a: EMI shield

7: Fiber optic socket

8: Rear end of socket

9: Socket hook

91: frame

911: Joint

92: hook block

S101~S103: Steps

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

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

FIG. 3 is an exploded view of an optical fiber conversion module according to an embodiment of the present invention.

FIG. 4 is a first schematic diagram of assembly of an optical fiber conversion module according to an embodiment of the present invention.

FIG. 5 is a second schematic diagram of the assembly of the optical fiber conversion module according to the embodiment of the present invention.

FIG. 6 is a third schematic diagram of the assembly of the optical fiber conversion module according to the embodiment of the present invention.

FIG. 7 is a schematic partial cross-sectional view of an optical fiber conversion module according to an embodiment of the present invention.

FIG. 8 is a flowchart of an assembly method of an optical fiber transition module according to an embodiment of the present invention.

In order to fully understand the present invention, the present invention will be described in detail by the following specific embodiments and accompanying drawings. Those skilled in the art can understand the purpose, features and effects of the present invention from the content disclosed in this specification. It should be noted that the present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the patent scope of the present invention. The description is as follows: as shown in Figure 3, the optical fiber conversion module 100 of the embodiment of the present invention includes: a housing 1, an optical interface 2, at least two optical fiber ferrules 3, at least two optical fibers 4, at least two Core sleeve 5 and an EMI shield 6 .

The housing 1 includes a base 11 and an upper cover 12 for accommodating other components of the optical fiber conversion module 100 . The base 11 and the upper cover 12 are preferably made of metal, or metal is laid on the inner surface to achieve EMI protection. The shape of the housing 1 can be changed as required.

The optical interface 2 is used to convert the optical signal transmitted by the optical fiber 4 into an electrical signal, or convert the electrical signal into an optical signal, and then transmit it through the optical fiber 4 . In this embodiment, the optical interface 2 includes an optical interface 21 at the transmitting end (which can be connected to a photodiode, photodiode), an optical interface 22 at the receiving end (which can be connected to a vertical-cavity surface-emitting laser, Vertical-Cavity Surface- Emitting Laser, VCSEL) and circuit board 23. The transmitting end optical interface 21 and the receiving end optical interface 22 are connected to the circuit board 23 respectively, and each Self-connecting to an optical fiber 4 . The circuit board 23 extends to the rear and can be connected to other external devices for receiving or transmitting signals.

In FIG. 3 , a part of the socket rear end 8 is removed to show the fiber stub 3 (Fiber Stub). The content about the socket rear end 8 will be introduced later. The fiber ferrule 3 is cylindrical and has a through hole at its axis for receiving the optical fiber 4 . In this embodiment, the optical fiber ferrule 3 is made of ceramic material, which has good chemical stability, is wear-resistant, and is suitable for precision machining.

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

The ferrule sleeve 5 is connected to the fiber ferrule 3 along the axial direction. Referring to FIG. 7 , the ferrule sleeve 5 can accommodate another fiber ferrule to align the connecting optical fiber 4 .

FIG. 3 shows multiple sets of optical fiber ferrules 3 , optical fibers 4 and ferrule sleeves 5 . Preferably, there are at least one group of optical fiber ferrules 3, optical fibers 4 and ferrule sleeves 5 (the number is two respectively), and the group of optical fibers 4 are respectively connected to the optical interface 21 at the transmitting end and the optical interface 22 at the receiving end, so as to receive from the outside respectively. The optical signal is received and the optical signal is transmitted out of the optical fiber adapter module 100 . Figure 3 shows four groups of above-mentioned structures, but the present invention is not limited thereto, the number of groups of each component can be changed, and in the most simplified state, there can be only a single fiber ferrule 3, optical fiber 4 and ferrule sleeve barrel 5 to fit the EMI shield 6.

FIG. 1 shows the 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 defines at least one accommodating hole 611 . The number of receiving holes 611 can be adjusted according to the number of fiber ferrules 3/optical fibers 4 provided. One side of the metal shield 61 is provided with a guideway 612, the guideway 612 communicates with the accommodating hole 611 from the side of the metal shield 61, the width of the guideway 612 is smaller than the diameter of the accommodating hole 611 and allows the optical fiber 4 Through, the optical fiber ferrule 3 is passed through the accommodating hole.

Next, how to assemble the EMI shield 6 will be described. The assembly method of the optical fiber conversion module 100 of the embodiment of the present invention includes the following steps: as shown in Figure 4 and Figure 8, in step S101, make the optical fiber 4 along the radial direction of the corresponding optical fiber ferrule 3 (as shown in Figure 4), enter the accommodating hole 611 from the guide way 612 on the side of the metal shield 61. At this time, one end of the optical fiber 4 has been fixed in advance on the optical interface 21 of the transmitting end or the optical interface 22 of the receiving end, and the other end is connected with the optical fiber socket 7 or the socket hook 9 (the functions of the optical fiber socket 7 and the socket hook 9 will be described later. As described in the text), it is difficult for the EMI shielding member 6 to be inserted from both ends of the optical fiber 4 . However, since the metal shield 61 is provided with a guiding channel 612 and an accommodating hole 611 communicating with the guiding channel 612 , the metal shielding body 61 can be easily inserted from the side (radial direction) of the optical fiber 4 .

Next, as shown in FIG. 4 and FIG. 8 , in step S102, the metal shield 61 is relatively moved along the axial direction of the optical fiber ferrule 3 , so that the optical fiber ferrule 3 with the rear end 8 of the receptacle is accommodated in the accommodation hole 611 middle.

Thereby, the EMI shielding member 6 of the present invention can be embedded into the optical fiber ferrule 3 and its peripheral socket rear end 8 from the side of the optical fiber 4, so that the EMI shielding member 6 can be directly loaded into the optical fiber socket 7, which not only improves the optical fiber The assembly structure of the adapter module 100 also makes the EMI shield 6 easy to install and achieves effective and high-coverage EMI protection performance.

In this embodiment, as shown in FIG. 1 , one EMI shield 6 has four receiving holes 611 to match two groups of optical fibers 4 /fiber ferrules 3 . However, the present invention is not limited thereto. An EMI shield 6 may only have two accommodating holes 611 to match a group of optical fibers 4/fiber ferrules 3, or in the most simplified state, an EMI shield 6 may only There is a single accommodating hole 611 for installing a single optical fiber 4/fiber ferrule 3 .

In this embodiment, the number of accommodating holes 611 and guideways 612 is in a one-to-one relationship, and each accommodating hole 611 has its corresponding guideway 612. is two or four, then two or four guiding channels 612 correspond to two or four receiving holes 611 respectively. The opening position of the guiding channel 612 is preferably the side closest to the receiving hole 611 .

However, the present invention is not limited thereto. In another embodiment, as shown in FIG. 2 , in the metal shield 61 of the EMI shield 6a, there is also a secondary guideway 613 between every two accommodating holes 611. The guiding channel 613 communicates with the two receiving holes 611 . Therefore, every two receiving holes 611 can share a guiding channel 612 . The two optical fibers 4 enter the first accommodating hole 611 successively through the guiding channel 612 , and one of the optical fibers 4 enters the second accommodating hole 611 through the secondary guiding channel 613 . Based on a similar concept, the EMI shielding member can also be set so that more (for example, four, six, eight) accommodating holes 611 share a guideway 612 connected to the side, and the plurality of accommodating holes 611 The secondary guiding channels 613 communicate with each other to allow the optical fiber to move into each accommodating hole 611 respectively. In the embodiment of FIG. 1 , the guiding channels 612 are opened on the left and right sides of the metal shielding body 61 ; However, the present invention is not limited thereto, and the position of the side where the guide channel 612 is provided can be simply changed as required.

Further, as shown in FIG. 1 , the EMI shielding member 6 further includes a set of buckle blocks 62 respectively disposed on two opposite sides of the metal shielding body 61 . The main function of the buckle block 62 is to buckle with other optical components, so that the EMI shield 6 is firmly combined with the optical fiber ferrule 3 . Therefore, the setting position of the buckle block 62 needs to match the design of other optical devices, and the setting position of the guide track 612 should avoid the setting position of the buckle block 62 . For example, the buckle 62 of FIG. 1 is arranged on the upper and lower sides of the metal shield 61, and the guide way 612 is opened on the left and right sides; the buckle 62 of FIG. 2 is arranged on the left and right sides of the metal shield 61, then The guideway 612 is opened on the lower side (or it can be changed to the upper side or the upper and lower sides).

Further, as shown in FIG. 1 and FIG. 2 , the locking block 62 includes an elastic arm 621 extending from the side of the metal shield 61 , and an engaging portion 622 at the end of the elastic arm 621 . The elastic arm 621 is in the shape of a curved surface, and has the function of storing elastic potential energy, so that the optical fibers of each other in the array arranged by the optical fiber ferrule 3 The shafts are kept parallel to avoid deflection caused by assembly tolerances and to maintain effective contact during transitions. The fastening portion 622 is used for fastening to other optical devices, and is in the form of a groove in this embodiment, but the present invention is not limited thereto.

Further, as shown in FIGS. 3 to 7 , the fiber optic conversion module 100 further includes a fiber optic socket 7 . The number of optical fiber ferrules 3, optical fibers 4, ferrule sleeves 5 and accommodating holes 611 is at least two, and the optical fiber socket 7 is connected to two optical fiber ferrules 3, which are used to fix a group of optical fiber ferrules 3 and ferrule sleeves 5 And form an optical fiber array. FIG. 3 and FIG. 5 show an optical fiber array formed by a plurality of optical fiber sockets 7 arranged side by side.

Further, as shown in FIG. 3 to FIG. 7 , the optical fiber conversion module 100 further includes a socket rear end 8 disposed on the periphery of the optical fiber ferrule 3 . The accommodating hole 611 matches the outer diameter of the socket rear end 8 . The socket rear end 8 is preferably made of metal (such as iron), and the socket rear end 8 covers most of the optical fiber ferrule 3, and fills the gap between the optical fiber ferrule 3 and the receiving hole 611 to form The continuous shielding surface effectively further improves EMI protection.

Further, as shown in FIG. 3 and FIG. 4 , the optical fiber conversion module 100 further includes a socket hook 9 connected to the optical fiber socket 7 . The socket hook 9 includes a frame body 91 and a hook block 92 extending from the frame body 91 . The frame body 91 is connected to more than one optical fiber socket 7 , and the fastening portion 622 of the buckle block 62 is fixed to the joint portion 911 on the surface of the frame body 91 . In this embodiment, the engaging portion 911 is a protruding point for matching with the engaging portion 622 which is in the shape of a groove. However, the present invention is not limited thereto, and the buckling portion 622 and the engaging portion 911 may have other shapes. When the socket hook 9 does not exist, the buckling portion 622 can be buckled to the optical fiber socket 7 or other optical devices instead. The hook block 92 extends along the axial direction of the optical fiber ferrule 3 and can be used to fix another optical device with an optical fiber cable to be connected.

Therefore, further, the method for assembling the optical fiber conversion module 100 of the embodiment of the present invention may further include the following steps: in step S103 , inserting the optical fiber socket 7 into the socket hook 9 to complete the assembly.

The present invention has been disclosed by the embodiments above, but those skilled in the art should understand that the embodiments are only for describing the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiment should be included in the scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the patent application.

6: EMI shielding

61: metal shield

611: accommodating hole

612: Guidance Road

62: buckle block

621: elastic arm

622: fastening part

Claims (8)

A kind of EMI shielding piece, it comprises: a metal shielding body, and this metal shielding body is provided with two accommodating holes, and wherein, one side of this metal shielding body is provided with a guideway, and this guideway is from this metal shielding body The side is connected to one of the accommodating holes, and the width of the guide path is smaller than the diameters of the two accommodating holes. The metal shield has a secondary guide path, which communicates with the two accommodating holes. The width of the secondary guide path smaller than the diameters of the two accommodation holes. The EMI shielding member as described in Claim 1 further includes a set of buckle blocks respectively disposed on two opposite sides of the metal shielding body. The EMI shielding member according to claim 2, wherein the buckle block includes an elastic arm extending from the side of the metal shield, and a fastening portion at the end of the elastic arm, and the elastic arm is in the shape of a curved surface. An optical fiber conversion module, which includes: two optical fiber ferrules; two optical fibers, one end of the two optical fibers is respectively inserted into the two optical fiber ferrules; two ferrule sleeves are respectively connected to the two optical fiber ferrules; and an EMI The shielding part includes a metal shielding body, the metal shielding body is provided with two accommodating holes, one side of the metal shielding body is provided with a guiding path, and the guiding path is connected to the two accommodating holes from the side edge of the metal shielding body. One of the holes, and the metal shield has a secondary guideway, which communicates with the two accommodating holes, the width of the guideway and the secondary The widths of the guide tracks are smaller than the diameters of the two accommodating holes and allow the two optical fibers to pass through, and the two optical fiber ferrules respectively pass through the two accommodating holes. The optical fiber conversion module as described in claim 4 further includes an optical fiber socket connected to the two optical fiber ferrules. The optical fiber conversion module as described in claim 5 further includes two socket rear ends respectively arranged on the periphery of the two optical fiber ferrules. The optical fiber conversion module as described in claim 5 further includes a socket hook connected to the optical fiber socket. A method for assembling an optical fiber conversion module, comprising the following steps: making two optical fibers enter a guideway adjacent to the guideway from a guideway on the side of a metal shielding body along the radial direction of the fiber ferrule of the two optical fibers. In the accommodating hole, the width of the guideway is smaller than the diameter of the two accommodating holes; one of the two optical fibers enters from a secondary guideway of the metal shield into another accommodation away from the guideway. In the hole, wherein the auxiliary guideway connects the two accommodation holes, the width of the auxiliary guideway is smaller than the diameter of the two accommodation holes; and the metal shield moves relatively along the axial direction of the two optical fiber ferrules, The two optical fiber ferrules are respectively accommodated in the two accommodating holes.

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