TW202335572A - EMI shield component, fiber optic adapter module with EMI shield component, and assembly method of fiber optic adapter module solving problems of difficult assembly and poor protective effect of the EMI shielding component in the fiber optic adapter module - Google Patents

Abstract

An EMI shielding component, which includes: a metal shielding body provided with at least one accommodating hole, wherein a guide channel is provided on one side of the metal shielding body, notably, the guide channel is connected from the side of the metal shielding body to the accommodating hole and the width of the guide channel is smaller than the diameter of the accommodating hole. The present invention also discloses a fiber optic adapter module with the EMI shielding component and an assembly method of the fiber optic adapter module. The present invention solves the problems of difficult assembly and poor protective effect of the EMI shielding component in the fiber optic adapter module.

Description

EMI shield, fiber optic transfer module with EMI shield, and assembly method of fiber optic transfer module

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

Optical fiber switching module is a switching module that converts optical signals and electrical signals to each other. The components related to electrical signals are afraid of electromagnetic interference (EMI), so the modules are covered with metal shells in multiple directions to protect the components from EMI damage. However, in the direction in which the electrical signal-related components lead to the optical fiber extension (i.e., the optical port part), there is a lack of effective protection by the metal casing, so an additional shielding member perpendicular to the optical fiber extension direction is required.

The optical port part of the current fiber optic adapter module uses a shield with a through hole. The through hole allows the optical fiber ferrule (Stub) to pass through, thereby allowing the shield to pass through the optical fiber ferrule from the front end and be sleeved on the periphery of the optical fiber ferrule. However, the front end of the current optical fiber ferrule is often connected to other optical devices, which makes the front end of the fiber ferrule large and difficult to insert the shield from the front end. If the size of the through hole is to be increased, the shield cannot be connected to the optical fiber ferrule after being inserted. Effective fit, and the actual EMI protection effect is also greatly reduced.

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

In order to achieve the above objects and other objects, the present invention proposes an EMI shielding component, which includes: a metal shielding body, the metal shielding body is provided with at least one accommodation hole, wherein one side of the metal shielding body is provided with a guide. The guide channel is connected to the accommodating hole from the side of the metal shield, and the width of the guide channel is smaller than the diameter of the accommodating hole.

In one embodiment of the present invention, the number of the accommodating holes and the guide channels is two, and the two guide channels respectively correspond to the two accommodating holes.

In one embodiment of the present invention, the number of the accommodating holes is two, and the metal shielding body also has a guide channel connecting the two accommodating holes.

In one embodiment of the present invention, a set of buckling blocks is further included, respectively disposed on two opposite sides of the metal shielding body. The set of buckling blocks and the guide channel are located on different sides of the metal shielding body.

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

The present invention also proposes an optical fiber switching module, which includes: at least one optical fiber ferrule; at least one optical fiber, one end of the optical fiber is inserted into the optical fiber ferrule; at least one ferrule sleeve connected to the optical fiber ferrule; and An EMI shielding component includes a metal shielding body. The metal shielding body is provided with at least one accommodation hole. One side of the metal shielding body is provided with a guide connecting the accommodation hole from the side 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. The optical fiber ferrule is installed in the accommodating hole.

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

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

In one embodiment of the present invention, a socket hook is further included to connect to the fiber optic socket.

The present invention also proposes an assembly method of an optical fiber switching module, which includes the following steps: making an optical fiber enter a receiving hole from a guide channel on the side of a metal shield along the radial direction of the optical fiber ferrule. in; and relatively moving the metal shield along the axial direction of the optical fiber ferrule to accommodate the optical fiber ferrule in the accommodation hole.

Thereby, the EMI shielding member of the present invention can be embedded into the optical fiber ferrule from the side of the optical fiber, so that the EMI shielding member does not need to cooperate with the optical fiber socket and increases the aperture of the receiving hole, which not only improves the assembly structure of the optical fiber transfer module , also makes the EMI shield easy to install and achieves effective, high-coverage EMI protection performance.

In order to fully understand the present invention, the present invention is described in detail through the following specific embodiments and the accompanying drawings. Those skilled in the art can understand the purpose, features and effects of the present invention from the contents disclosed in this specification. It should be noted that the present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed in various ways 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 patentable scope of the present invention. The description is as follows:

As shown in Figure 3, the optical fiber switching module 100 according to 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, and at least two ferrule sleeves 5 and an EMI shield 6.

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

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 out through the optical fiber 4 . In this embodiment, the optical interface 2 includes a transmitting end optical interface 21 (can be connected to a photodiode), a receiving end optical interface 22 (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 respectively connected to the circuit board 23 for signals, and each is connected to an optical fiber 4 . The circuit board 23 extends rearward and can be connected to other external devices to receive or transmit signals.

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

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

The ferrule sleeve 5 is connected to the optical fiber ferrule 3 along the axial direction. Referring to FIG. 7 , the ferrule sleeve 5 can be used for another optical fiber ferrule to align and connect the optical fiber 4 .

Figure 3 shows multiple sets of optical fiber ferrules 3, optical fibers 4 and ferrule sleeves 5. Preferably, there is at least one set of optical fiber ferrules 3, optical fibers 4 and ferrule sleeves 5 (the number is two each), 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 from the outside. Receive optical signals and transmit the optical signals out of the optical fiber adapter module 100 . Figure 3 shows four groups of the above-mentioned structures. However, the invention is not limited thereto. The number of groups of each component can be changed. In the most simplified state, there can be only a single optical fiber ferrule 3, optical fiber 4 and ferrule sleeve. Barrel 5 to fit the EMI shield 6.

Figure 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 is provided with at least one receiving hole 611 . The number of receiving holes 611 can be adjusted according to the number of optical fiber ferrules 3/optical fibers 4 provided. A guide channel 612 is provided on one side of the metal shield 61. The guide channel 612 is connected to the accommodating hole 611 from the side of the metal shield 61. The width of the guide channel 612 is smaller than the diameter of the accommodating hole 611 and allows the optical fiber 4 Through this, the optical fiber ferrule 3 is inserted into the accommodating hole.

Next, how to assemble the EMI shield 6 will be explained. The assembly method of the optical fiber switching module 100 according to the embodiment of the present invention includes the following steps:

As shown in Figures 4 and 8, in step S101, the optical fiber 4 is moved from the side of the metal shield 61 along the radial direction of its corresponding optical fiber ferrule 3 (as shown by the arrows on both sides in Figure 4). The guide channel 612 enters the accommodating hole 611. At this time, one end of the optical fiber 4 has been fixed in advance to the transmitting end optical interface 21 or the receiving end optical interface 22, and the other end is connected to 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 discussed later. (described in the text), so the EMI shield 6 is difficult to insert from both ends of the optical fiber 4. However, since the metal shield 61 is provided with a guide channel 612 and a receiving hole 611 connected to the guide channel 612, the metal shield 61 can be easily inserted from the side (radial direction) of the optical fiber 4.

Next, as shown in FIGS. 4 and 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 socket rear end 8 is received in the accommodating hole 611 middle.

Thereby, the EMI shield 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 shield 6 can be directly installed into the optical fiber socket 7, which not only improves the The assembly structure of the transfer 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 , an EMI shield 6 has four receiving holes 611 to match two sets of optical fibers 4 / optical fiber ferrules 3 . However, the present invention is not limited thereto. An EMI shield 6 may have only two receiving holes 611 to match a set of optical fibers 4/fiber ferrules 3. Or in the most simplified state, an EMI shield 6 may only have two receiving holes 611 to match a set of optical fibers 4/fiber ferrules 3. It has a single receiving hole 611 for installing a single optical fiber 4/fiber ferrule 3.

In this embodiment, the number of accommodating holes 611 and guide channels 612 is in a one-to-one relationship. Each accommodating hole 611 has its corresponding guide channel 612. When the accommodating holes 611 and the guide channels 612 The number is two or four, then the two or four guide channels 612 correspond to the two or four receiving holes 611 respectively. The best position for opening the guide channel 612 is the side closest to the accommodating hole 611 .

However, the present invention is not limited to this. In another embodiment, as shown in Figure 2, the metal shield 61 of the EMI shield 6a also has a pair of guide channels 613 between every two accommodation holes 611. The guide channel 613 communicates with the two receiving holes 611 . Therefore, every two receiving holes 611 can share a guide channel 612 . Two optical fibers 4 successively enter the first accommodation hole 611 through the guide channel 612, and one of the optical fibers 4 enters the second accommodation hole 611 through the auxiliary guide channel 613. Based on a similar concept, the EMI shield can also be configured to have more (for example, four, six, or eight) receiving holes 611 sharing a guide channel 612 connected to the side. The multiple receiving holes 611 They are connected by auxiliary guide channels 613 to allow optical fibers to move to each accommodation hole 611 respectively. In the embodiment of FIG. 1 , the guide channels 612 are opened on the left and right sides of the metal shield 61 ; in the embodiment of FIG. 2 , the guide channels 612 are opened on the lower side of the metal shield 61 . However, the present invention is not limited to this, and the side position where the guide channel 612 is opened can be simply changed as needed.

Further, as shown in FIG. 1 , the EMI shield 6 further includes a set of buckle blocks 62 , which are respectively disposed on two opposite sides of the metal shield 61 . The main function of the buckle block 62 is to buckle with other optical devices so that the EMI shield 6 can be firmly combined with the optical fiber ferrule 3 . Therefore, the position of the buckle block 62 needs to match the design of other optical devices, and the opening position of the guide channel 612 avoids the position of the buckle block 62 . For example, if the buckle blocks 62 in Figure 1 are disposed on the upper and lower sides of the metal shield 61, then the guide channels 612 are opened on the left and right sides; if the buckle blocks 62 in Figure 2 are disposed on the left and right sides of the metal shield 61, then The guideway 612 is opened on the lower side (it can also be changed to the upper side or both upper and lower sides).

Further, as shown in FIGS. 1 and 2 , the buckle block 62 includes an elastic arm 621 extending from the side of the metal shield 61 and a buckle portion 622 located at the end of the elastic arm 621 . The elastic arm 621 is curved and has the function of storing elastic potential energy, which can keep the optical axes of each other in the array of optical fiber ferrules 3 parallel to avoid deflection caused by assembly tolerances, and can remain effective during transfer. get in touch with. The buckling portion 622 is used to buckle with other optical devices. In this embodiment, it is in the form of a groove, but the invention is not limited thereto.

Further, as shown in FIGS. 3 to 7 , the optical fiber switching module 100 further includes an optical fiber socket 7 . The number of optical fiber ferrules 3, optical fibers 4, ferrule sleeves 5 and accommodation holes 611 is at least two. The optical fiber socket 7 connects two optical fiber ferrules 3 and functions to fix a set of optical fiber ferrules 3 and ferrule sleeves 5. to form an optical fiber array. Figures 3 and 5 show an optical fiber array formed by multiple optical fiber sockets 7 arranged side by side.

Furthermore, as shown in FIGS. 3 to 7 , the optical fiber switching module 100 further includes a socket rear end 8 , which is disposed around the periphery of the optical fiber ferrule 3 . The receiving hole 611 matches the outer diameter of the rear end 8 of the socket. The rear end 8 of the socket is preferably made of metal (such as iron). The rear end 8 of the socket 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 a The continuous shielding surface effectively further improves EMI protection.

Further, as shown in FIGS. 3 and 4 , the optical fiber switching module 100 further includes a socket hook 9 connected to the optical fiber socket 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 optical fiber sockets 7 , and the engaging portion 622 of the buckle block 62 is fixed to the joint portion 911 on the surface of the frame 91 . In this embodiment, the engaging portion 911 is a protruding point to engage with the groove-shaped engaging portion 622 . However, the present invention is not limited thereto. The fastening portion 622 and the joint portion 911 can be in other shapes. When the socket hook 9 does not exist, the fastening portion 622 can be fastened to the fiber optic socket 7 or other optical devices. The hook block 92 extends along the axial direction of the optical fiber ferrule 3 and can be used to fix another optical device having an optical fiber cable to be connected.

Therefore, further, the assembly method of the optical fiber switching module 100 according to the embodiment of the present invention may further include the following steps: in step S103, the optical fiber socket 7 is inserted into the socket hook 9 to complete the assembly.

The present invention has been disclosed in the above embodiments. However, those skilled in the art should understand that the embodiments are only used to illustrate the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that any changes and substitutions that are equivalent to this embodiment should be considered to be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope of the patent application.

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: Optical fiber ferrule 4: Optical fiber 5: Ferrule sleeve 6:EMI shielding parts 61: Metal shield 611: Accommodation hole 612:Guide Road 613:Assistant guide road 62: buckle block 621:Elastic arm 622: Fastening part 6a:EMI shielding parts 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 three-dimensional view of an EMI shield according to an embodiment of the present invention. FIG. 2 is a schematic three-dimensional view of an EMI shielding component according to another embodiment of the present invention. FIG. 3 is an exploded view of an optical fiber switching module according to an embodiment of the present invention. Figure 4 is a schematic diagram 1 of the assembly of an optical fiber switching module according to an embodiment of the present invention. Figure 5 is a second assembly schematic diagram of an optical fiber switching module according to an embodiment of the present invention. Figure 6 is a third assembly diagram of an optical fiber switching module according to an embodiment of the present invention. Figure 7 is a partial cross-sectional schematic view of an optical fiber switching module according to an embodiment of the present invention. FIG. 8 is a flow chart of an assembly method of an optical fiber switching module according to an embodiment of the present invention.

6:EMI shielding parts

61: Metal shield

611: Accommodation hole

612:Guide Road

62: buckle block

621:Elastic arm

622: Fastening part

Claims (10)

An EMI shield consisting of: A metal shield with at least one receiving hole, Wherein, a guide channel is provided on one side of the metal shield, and the guide channel is connected to the accommodating hole from the side of the metal shield. The width of the guide channel is smaller than the diameter of the accommodating hole. The EMI shielding member as described in claim 1, wherein the number of the accommodating holes and the guide channels is two, and the two guide channels respectively correspond to the two accommodating holes. The EMI shielding member of claim 1, wherein the number of the accommodating holes is two, and the metal shielding body also has a guide channel connecting the two accommodating holes. The EMI shielding component as described in any one of claims 1 to 3, further includes a set of buckle blocks, which are respectively arranged on two opposite sides of the metal shielding body. The EMI shield of claim 4, wherein the buckle block includes an elastic arm extending from a side of the metal shield, and a buckle portion located at the end of the elastic arm, and the elastic arm is curved. An optical fiber switching 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 is connected to the optical fiber ferrule; and An EMI shielding component includes a metal shielding body. The metal shielding body is provided with at least one accommodation hole. One side of the metal shielding body is provided with a guide connecting the accommodation hole from the side 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. The optical fiber ferrule is installed in the accommodating hole. The optical fiber switching module as described in claim 6 further includes 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 connects the two optical fibers. Ferrule. The optical fiber switching module as claimed in claim 7 further includes a socket rear end disposed on the periphery of the optical fiber ferrule. The optical fiber switching module as claimed in claim 7 further includes a socket hook connected to the optical fiber socket. An assembly method of an optical fiber switching module, including the following steps: Make an optical fiber enter a receiving hole from a guide channel on the side of a metal shield along the radial direction of the optical fiber ferrule; and The metal shield is relatively moved along the axial direction of the optical fiber ferrule, so that the optical fiber ferrule is accommodated in the accommodation hole.

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