CN214795312U

CN214795312U - Optical module

Info

Publication number: CN214795312U
Application number: CN202121355193.4U
Authority: CN
Inventors: 叶书华; 司宝峰
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-11-19
Anticipated expiration: 2031-06-17

Abstract

The optical module provided by the application comprises a circuit board, an upper shell, a lower shell, a light-emitting secondary module and a light-receiving secondary module which are electrically connected with the circuit board, wherein, a first rubber ring is arranged between the light emitting shell and the light port, a second rubber ring is arranged between the light receiving shell and the light port, an upper shell corresponding structure designed for filling the gap between the rubber ring and the upper shell, and a supporting seat corresponding structure arranged for filling the gap between the rubber ring and the lower shell, the light port shielding structure can realize that the first rubber ring passes between the light emitting shell and the light port, and the first rubber ring is seamlessly connected with the upper shell and the lower shell, thereby preventing the electromagnetism generated by the light emitting part from radiating to the outside through the light port, and simultaneously, a second rubber ring is arranged between the light receiving shell and the light port, and the second rubber ring is connected with the upper shell and the lower shell in a seamless mode, so that electromagnetism generated by the light receiving portion is prevented from radiating to the outside through the light port. The electromagnetic shielding performance of the optical module can be improved.

Description

Optical module

Technical Field

The application relates to the technical field of communication, in particular to an optical module.

Background

With the development of communication technology, the number and types of optical modules and devices are increasing, so that the electromagnetic environment is increasingly complex, and the electromagnetic pollution is more and more serious. In such a complex electromagnetic environment, how to reduce electromagnetic interference of the optical module on other devices and improve the electromagnetic shielding performance of the optical module, so that various devices can coexist and can normally work becomes a key content.

In the existing optical module structure, an optical module comprises an optical transmitter sub-module, an optical receiver sub-module, an upper shell and a lower shell, wherein the optical transmitter sub-module and the optical receiver sub-module are fixed at corresponding positions of the upper shell and the lower shell through metal pieces, metal hard contact exists between the optical transmitter sub-module and the optical receiver sub-module, a certain gap exists, and the existence of the gap causes electromagnetism generated in the existing optical module to radiate to the outside from an optical port position of the optical module, so that the optical port electromagnetic shielding effect of the existing optical module is poor.

SUMMERY OF THE UTILITY MODEL

An embodiment of the present application provides an optical module, including:

a circuit board;

a lower housing;

the upper shell is provided with a first rubber ring wrapping groove and a second rubber ring wrapping groove which are respectively used for wrapping the upper surfaces of the first rubber ring and the second rubber ring;

the light emission secondary module is electrically connected with the circuit board and comprises a light emission shell, and the first rubber ring is arranged between the light emission shell and a light port of the light module;

the light receiving secondary module is electrically connected with the circuit board and comprises a light receiving shell, and the second rubber ring is arranged between the light receiving shell and the optical port of the optical module;

the supporting seat is provided with a first rubber ring embedding groove and a second rubber ring embedding groove, and is arranged on the surface of the lower shell and used for supporting the lower surface of the first rubber ring and the lower surface of the second rubber ring.

Has the advantages that:

it can be seen by above-mentioned scheme that the optical module that this application provided includes circuit board, last casing, lower casing, the optical emission submodule and the optical reception submodule of being connected with the circuit board electricity, wherein, in order to improve the optical window shielding effect of optical module, increase optical window shielding structure in this application, optical window shielding structure includes: a first rubber ring arranged between the light emitting shell and the light port, a second rubber ring arranged between the light receiving shell and the light port, an upper shell corresponding structure designed for filling a gap between the rubber ring and the upper shell, and a support seat corresponding structure arranged for filling a gap between the rubber ring and the lower shell, the light port shielding structure can realize that the first rubber ring passes between the light emitting shell and the light port, the first rubber ring is connected with the upper shell and the lower shell in a seamless way, so that the light emitting shell is sealed from the light port, the electromagnetism generated by the light emitting part is prevented from radiating to the outside through the light port, and simultaneously, the second rubber ring is arranged between the light receiving shell and the light port, and the second rubber ring is connected with the upper shell and the lower shell in a seamless mode, so that the light receiving shell is sealed from the light port, and the electromagnetism generated by the light receiving portion is prevented from radiating to the outside through the light port. The optical port shielding effect of the optical module can be improved, and the electromagnetic shielding performance of the optical module is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;

fig. 2 is a schematic structural diagram of an optical network terminal;

fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present application;

fig. 4 is an exploded schematic structural diagram of an optical module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an optical module provided in an embodiment of the present application after an upper housing, a lower housing, and an unlocking component are removed;

fig. 6 is an original structural diagram of a tosa and an rosa of an optical module provided in the embodiment of the present application;

fig. 7 is a schematic diagram of an original exploded structure of a tosa and an rosa of an optical module provided in the embodiment of the present application;

fig. 8 is an exploded schematic view of an optical transmitter sub-module and an optical receiver sub-module of an optical module provided in the embodiment of the present application after an optical port shielding structure is added;

fig. 9 is a schematic effect diagram of an optical transceiver module of an optical module according to an embodiment of the present disclosure after an optical port shielding structure is added to the optical transceiver module;

fig. 10 is a schematic diagram illustrating a layout effect of an optical port shielding structure of an optical module according to an embodiment of the present application;

fig. 11 is a schematic cross-sectional effect diagram of an optical port shielding structure of an optical module according to an embodiment of the present application;

FIG. 12 is an exploded view of the structure of FIG. 11;

fig. 13 is a schematic diagram of a relative structure between an optical port shielding structure of an optical module and a lower housing according to an embodiment of the present application;

fig. 14 is a schematic diagram of a relative structure between an optical port shielding structure of an optical module and an upper housing according to an embodiment of the present application;

fig. 15 is a schematic view of an internal structure of an upper housing of an optical module according to an embodiment of the present application;

fig. 16 is a first schematic perspective view of a supporting base of an optical module according to an embodiment of the present disclosure;

fig. 17 is a schematic perspective view illustrating a second three-dimensional structure of a supporting seat of an optical module according to an embodiment of the present application;

fig. 18 is a schematic diagram of a relative structure of a supporting seat and a rubber ring of an optical module according to an embodiment of the present application;

fig. 19 is a schematic diagram of a relative structure of a supporting base and a shielding plate of an optical module according to an embodiment of the present disclosure;

fig. 20 is a schematic perspective view of a shielding plate of an optical module according to an embodiment of the present application;

fig. 21 is a schematic view illustrating a connection manner between a supporting base and a shielding plate of an optical module according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

One of the core links of optical fiber communication is the interconversion of optical and electrical signals. The optical fiber communication uses optical signals carrying information to transmit in information transmission equipment such as optical fibers/optical waveguides, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of light in the optical fibers/optical waveguides; meanwhile, the information processing device such as a computer uses an electric signal, and in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer, it is necessary to perform interconversion between the electric signal and the optical signal.

The optical module realizes the function of interconversion of optical signals and electrical signals in the technical field of optical fiber communication, and the interconversion of the optical signals and the electrical signals is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and the main electrical connection comprises power supply, I2C signals, data information, grounding and the like; the electrical connection mode realized by the gold finger has become the mainstream connection mode of the optical module industry, and on the basis of the mainstream connection mode, the definition of the pin on the gold finger forms various industry protocols/specifications.

Fig. 1 is a schematic diagram of connection relationship of an optical communication terminal. As shown in fig. 1, the connection of the optical communication terminal mainly includes interconnection among the optical network terminal 100, the optical module 200, the optical fiber 101, and the network cable 103.

One end of the optical fiber 101 is connected with a far-end server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment and the far-end server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical network terminal 100 having the optical module 200.

An optical port of the optical module 200 is externally accessed to the optical fiber 101, and establishes bidirectional optical signal connection with the optical fiber 101; an electrical port of the optical module 200 is externally connected to the optical network terminal 100, and establishes bidirectional electrical signal connection with the optical network terminal 100; the optical module realizes the mutual conversion of optical signals and electric signals, thereby realizing the establishment of information connection between the optical fiber and the optical network terminal. Specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber.

The optical network terminal is provided with an optical module interface 102, which is used for accessing an optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal is provided with a network cable interface 104, which is used for accessing the network cable 103 and establishing bidirectional electric signal connection with the network cable 103; the optical module 200 is connected to the network cable 103 via the optical network terminal 100. Specifically, the optical network terminal transmits a signal from the optical module to the network cable and transmits the signal from the network cable to the optical module, and the optical network terminal serves as an upper computer of the optical module to monitor the operation of the optical module.

At this point, a bidirectional signal transmission channel is established between the remote server and the local information processing device through the optical fiber, the optical module, the optical network terminal and the network cable.

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network terminal is an upper computer of the optical module, provides data signals for the optical module, and receives the data signals from the optical module, and the common upper computer of the optical module also comprises an optical line terminal and the like.

Fig. 2 is a schematic diagram of an optical network terminal structure. An optical network terminal in the optical communication terminal of the foregoing embodiment is described below with reference to fig. 2; as shown in fig. 2, the optical network terminal 100 has a circuit board 105, and a cage 106 is disposed on a surface of the circuit board 105; an electric connector is arranged in the cage 106 and used for connecting an electric port of an optical module such as a golden finger; the cage 106 is provided with a heat sink 107, and the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into the optical network terminal 100, specifically, an electrical port of the optical module is inserted into an electrical connector inside the cage 106, and an optical port of the optical module is connected to the optical fiber 101.

The cage 106 is positioned on the circuit board, and the electrical connector on the circuit board is wrapped in the cage, so that the electrical connector is arranged in the cage; the optical module is inserted into the cage, held by the cage, and the heat generated by the optical module is conducted to the cage 106 and then diffused by the heat sink 107 on the cage.

Fig. 3 is a schematic structural diagram of an optical module 200 according to an embodiment of the present disclosure, and fig. 4 is an exploded structural diagram of the optical module 200 according to the embodiment of the present disclosure. As shown in fig. 3 and 4, an optical module 200 provided in an embodiment of the present application includes an upper housing 201, a lower housing 202, a circuit board 300, an unlocking member 203, a tosa 400, and a rosa 500.

The upper shell 201 is covered on the lower shell 202 to form a wrapping cavity with two openings; the outer contour of the wrapping cavity is generally a square body, and specifically, the lower shell comprises a main plate and two side plates which are positioned at two sides of the main plate and are perpendicular to the main plate; the upper shell comprises a cover plate, and the cover plate covers two side plates of the upper shell to form a wrapping cavity; the upper shell can also comprise two side walls which are positioned at two sides of the cover plate and are perpendicular to the cover plate, and the two side walls are combined with the two side plates to realize that the upper shell covers the lower shell.

The two openings may be two ends (204, 205) in the same direction, or two openings in different directions; one of the openings is an electric port 205, and a gold finger of the circuit board extends out of the electric port 205 and is inserted into an upper computer such as an optical network unit; the other opening is an optical port 204 for external optical fiber access to connect the tosa 400 and the rosa 500 inside the optical module; the optoelectronic devices such as the circuit board 300, the tosa 400 and the rosa 500 are located in the package cavity.

The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the transmitter sub-module 400, the receiver sub-module 500 and other devices can be conveniently installed in the shells, and the outermost packaging protection shell of the optical module is formed by the upper shell and the lower shell; the upper shell and the lower shell are made of metal materials generally, so that electromagnetic shielding and heat dissipation are facilitated; generally, the shell of the optical module cannot be made into an integrated structure, so that when devices such as a circuit board and the like are assembled, the positioning component, the heat dissipation structure and the electromagnetic shielding structure cannot be installed, and the production automation is not facilitated.

The unlocking component 203 is located on the outer wall of the wrapping cavity/lower shell 202, and is used for realizing the fixed connection between the optical module and the upper computer or releasing the fixed connection between the optical module and the upper computer.

The unlocking component 203 is provided with a clamping structure matched with the upper computer cage; the end of the unlocking component can be pulled to enable the unlocking component to move relatively on the surface of the outer wall; the optical module is inserted into a cage of the upper computer, and the optical module is fixed in the cage of the upper computer by a clamping structure of the unlocking component; by pulling the unlocking component, the clamping structure of the unlocking component moves along with the unlocking component, so that the connection relation between the clamping structure and the upper computer is changed, the clamping relation between the optical module and the upper computer is released, and the optical module can be drawn out from the cage of the upper computer.

The tosa 400 and the rosa 500 are respectively used for transmitting and receiving optical signals. The tosa 400 and the rosa 500 may also be combined together to form an integrated optical transceiver structure. The tosa 400 includes a light emitting chip and a backlight detector, and the rosa 500 includes a light receiving chip.

The circuit board 300 is located in a package cavity formed by the upper shell 201 and the lower shell 202, and circuit traces, electronic elements (such as capacitors, resistors, triodes and MOS transistors) and chips (such as a microprocessor MCU, a laser driving chip, a limiting amplifier, a clock data recovery CDR, a power management chip and a data processing chip DSP) are disposed on the circuit board 300.

In the embodiment of the application, the transimpedance amplifier is closely associated with the light receiving chip. The transimpedance amplifier chip can be independently packaged on the circuit board 300, and the light receiving chip and the transimpedance amplifier are electrically connected with the circuit board 300 through the independent package; the transimpedance amplifier and the light receiving chip can be packaged together in an independent package body, such as the same coaxial tube shell TO or the same square cavity; the light receiving chip and the transimpedance amplifier can be arranged on the surface of the circuit board without adopting an independent packaging body; the light receiving chip can be independently packaged, the trans-impedance amplifier is arranged on the circuit board, and the quality of a received signal can meet certain relatively low requirements.

The chip on the circuit board can be an all-in-one chip, for example, a laser driving chip and an MCU chip are fused into a chip, and a laser driving chip, a limiting amplification chip and an MCU chip are also fused into a chip, wherein the chip is the integration of the circuit, but the functions of all the circuits do not disappear due to the integration, and only the integration of the circuit forms occurs. Therefore, when the circuit board is provided with three independent chips, namely the MCU, the laser driving chip and the amplitude limiting amplification chip, the scheme is equivalent to that of arranging a single chip with three functions in one on the circuit.

The circuit board 300 connects the electrical devices in the optical module together according to the circuit design through circuit wiring to realize the electrical functions of power supply, electrical signal transmission, grounding and the like. The circuit board 300 is a carrier of main electrical components of the optical module, and the electrical components not arranged on the circuit board are finally electrically connected with the circuit board, and the electrical connector on the circuit board 300 realizes the electrical connection between the optical module and the host computer thereof.

The circuit board 300 is generally a rigid circuit board, which can also perform a bearing function due to its relatively rigid material, for example, the rigid circuit board can stably bear a chip; when the tosa 400 and the rosa 500 are located on the circuit board, the rigid circuit board can also provide a stable load; the hard circuit board can also be inserted into an electric connector in the upper computer cage, and specifically, a metal pin/golden finger is formed on the surface of the tail end of one side of the hard circuit board and is used for being connected with the electric connector; these are not easily implemented with flexible circuit boards.

The circuit board 300 has a golden finger on the surface of its end, the golden finger is composed of a pin independent from each other, the circuit board 300 is inserted into the electric connector in the cage, and the golden finger is electrically connected with the upper computer. The upper computer and the optical module can adopt an I2C protocol to carry out information transmission through I2C pins. The upper computer can write information into the optical module, and particularly, the upper computer can write the information into a register of the optical module; the optical module cannot write information into the upper computer, and when the optical module needs to provide information to the upper computer, the optical module writes the information into a preset register (such as a transmission status register, a data transmission failure register, and the like set in this embodiment) in the optical module, and the upper computer reads the register, and the register of the optical module is generally integrated in an MCU of the optical module, or can be independently set on the circuit board 300 of the optical module.

A flexible circuit board is also used in a part of the optical module to supplement a rigid circuit board; the flexible circuit board is generally used in combination with a rigid circuit board, for example, the rigid circuit board may be connected to the optical transceiver device through the flexible circuit board.

Fig. 5 is a schematic structural diagram of an optical module provided in an embodiment of the present application after an upper housing, a lower housing, and an unlocking component are removed; the tosa 400 and the rosa 500 are respectively used for transmitting and receiving optical signals. In this embodiment, the tosa 400 may be a coaxial TO package physically separated from the circuit board and electrically connected TO the first flexible board 310; the optical sub-assembly 500 is also packaged in a coaxial TO package, physically separated from the circuit board, and electrically connected through the second flexible board 320. In another common implementation, may be disposed on a surface of the circuit board 300; in addition, the tosa 400 and the rosa 500 may be combined together to form an integrated optical transceiver structure.

The tosa 400 includes a light emitting housing 410, the tosa 500 includes a light receiving housing 420, a light emitting chip, a lens, etc. are disposed inside the light emitting housing 410 to transmit light signals, and a light receiving chip, a backlight detector, etc. are disposed inside the light receiving housing 420 to receive light signals.

Fig. 6 is an original structural diagram of a tosa and an rosa of an optical module provided in the embodiment of the present application; fig. 7 is a schematic diagram of an original exploded structure of a tosa and an rosa of an optical module provided in the embodiment of the present application; as shown in fig. 6 and 7, a sealing tube 411, a first adjusting sleeve 412 and a first optical fiber adapter 510 are sequentially arranged on one side of the light emitting housing 410, and a second adjusting sleeve 421 and a second optical fiber adapter 520 are sequentially arranged on one side of the light receiving housing 420; further, both ends of the first adjusting sleeve 412 are respectively provided with a left support ring 4121 and a right support ring 4122; an end of the second adjustment sleeve 421 away from the light receiving housing 420 is provided with a support ring 4211.

Be equipped with the light emitting device in the light emission casing 410, the one end of light emission casing 410 is passed through the pin and is realized the electricity with first flexible board 310 and is connected, the other end and the one end of sealing body 411 are connected, can set up focusing lens in the sealing body 411 to, the other end of sealing body 41152 and the one end looks butt of first adjusting sleeve 412, sealing body 411 and first adjusting sleeve 412 are in the same place through the solder welding. The other end of the first adjusting sleeve 412 is sleeved on the first optical fiber adapter 510, and during packaging, by adjusting the relative positions of the first optical fiber adapter 510 and the first adjusting sleeve 412, the focal point of the focusing lens in the sealing and welding tube 411 is located at the light inlet of the first optical fiber adapter 510 to ensure the optical coupling efficiency, and then the first optical fiber adapter 510 and the first adjusting sleeve 412 are welded together.

In the process of signal transmission, after receiving the electrical signal transmitted from the first flexible board 310, the optical transmitter in the optical transmitting housing 410 converts the electrical signal into an optical signal, and then the optical signal sequentially passes through the sealing welding tube 411 and the first adjusting sleeve 412, enters the first optical fiber adapter 510, and is transmitted to the outside of the optical module.

In order to protect the light emitting device in the light emitting housing 410 during the use of the optical module, the light emitting housing 410 in this embodiment is hermetically sealed.

A light receiving device is arranged in the light receiving housing 420, one end of the light receiving housing 420 is electrically connected with the second flexible board 320 through a pin, the other end of the light receiving housing is abutted to one end of the second adjusting sleeve 421, the other end of the second adjusting sleeve 421 is sleeved on the second optical fiber adapter 520, when the light receiving housing is packaged, the focus of the focusing lens in the light receiving housing 420 is located at the light inlet of the second optical fiber adapter 520 by adjusting the relative position of the second optical fiber adapter 520 and the second adjusting sleeve 421, so as to ensure the light coupling efficiency, and then the second optical fiber adapter 520 and the second adjusting sleeve 421 are welded together.

In the signal receiving process, after receiving the optical signal transmitted from the second optical fiber adapter 520, the optical receiving device in the optical receiving housing 420 converts the optical signal into an electrical signal, and then the electrical signal is transmitted to the upper computer through the second flexible board 320 and the circuit board 300.

In order to protect the light receiving device in the light receiving housing 420 during the use of the optical module, the light receiving housing 420 in this embodiment is hermetically sealed.

Fig. 8 is an exploded schematic view of an optical transmitter sub-module and an optical receiver sub-module of an optical module provided in the embodiment of the present application after an optical port shielding structure is added; fig. 9 is a schematic effect diagram of an optical transceiver module of an optical module according to an embodiment of the present disclosure after an optical port shielding structure is added to the optical transceiver module; in order to increase the electromagnetic shielding performance of light mouthful in this application embodiment, increase light mouthful shielding structure in this application, light mouthful shielding structure includes: a first rubber ring arranged between the light emitting shell and the light port, a second rubber ring arranged between the light receiving shell and the light port, an upper shell corresponding structure designed for filling a gap between the rubber ring and the upper shell, and a support seat corresponding structure arranged for filling a gap between the rubber ring and the lower shell, the light port shielding structure can realize that the first rubber ring passes between the light emitting shell and the light port, the first rubber ring is connected with the upper shell and the lower shell in a seamless way, so that the light emitting shell is sealed from the light port, the electromagnetism generated by the light emitting part is prevented from radiating to the outside through the light port, and simultaneously, the second rubber ring is arranged between the light receiving shell and the light port, and the second rubber ring is connected with the upper shell and the lower shell in a seamless mode, so that the light receiving shell is sealed from the light port, and the electromagnetism generated by the light receiving portion is prevented from radiating to the outside through the light port. The optical port shielding effect of the optical module can be improved, and the electromagnetic shielding performance of the optical module is further improved.

In the embodiment of the present application, in order to design the first rubber ring and the second rubber ring as rubber rings having the same size and design the supporting seat as a symmetrical structure, the first rubber ring 610 is disposed in contact with the side wall of the left supporting ring 4121 of the first adjusting sleeve 412 near the right supporting ring 4122, the second rubber ring 620 is disposed on the side wall of the light receiving housing 420, specifically, the second rubber ring 620 is disposed on the side wall of the light receiving housing 420 near the second optical fiber adapter 520, and the effect of disposing the first rubber ring 610 and the second rubber ring 620 at corresponding positions is schematically shown in fig. 9.

Meanwhile, the shielding plate 700 is disposed on the side wall of the right support ring 4122 of the first adjustment sleeve 412 near the first fiber optic adapter 510 and the side wall of the support ring 4211 of the second adjustment sleeve 421 near the second fiber optic adapter 520, and the effect of the shielding plate 700 is schematically shown in fig. 10.

In the embodiment of the present application, the space between the left support ring and the right support ring of the first adjusting sleeve 412 and the space between the support rings of the light receiving housing 420 and the second adjusting sleeve 421 are the same in length and thickness, so that the first rubber ring 610 and the second rubber ring 620 can be designed as rubber rings with the same size, which is convenient for the quantitative production of the rubber rings.

Thus, after the first rubber ring 610 and the second rubber ring 620 are added, the space between the left and right support rings of the first adjustment sleeve 412 is divided into the first rubber ring 610, the first connection part 611, and the right support ring 4122, and the space between the light receiving housing 420 to the support ring of the second adjustment sleeve 421 is divided into the second rubber ring 620, the second connection part 621, and the support ring 4211.

Fig. 11 is a schematic cross-sectional effect diagram of an optical port shielding structure of an optical module according to an embodiment of the present application; fig. 11 is a schematic cross-sectional effect diagram of an optical port shielding structure of an optical module according to an embodiment of the present application; FIG. 12 is an exploded view of the structure of FIG. 11; as shown in fig. 11, the first rubber ring 610 may be seamlessly overlapped with the upper housing 201 and the lower housing 202, and the second rubber ring 620 may also be seamlessly overlapped with the upper housing 201 and the lower housing 202, so that the electromagnetic waves generated on the circuit board 300, the tosa 400 and the tosa 500 may be shielded and prevented from being radiated to the outside of the optical module through the optical port. The circuit board 300, the tosa 400, and the rosa 500 are the main electromagnetic sources of the optical module, and most of the electromagnetic waves are generated by the circuit board 300, the tosa 400, and the rosa 500, so the embodiment of the present invention focuses on isolating the electromagnetic waves generated by the circuit board 300, the tosa 400, and the rosa 500.

As shown in fig. 12, the disassembled structure includes, from top to bottom, an upper housing 201, a first rubber ring 610, a second rubber ring 620, a supporting base 800, a conductive cloth 900, and a lower housing 202. The upper shell 201 can wrap the first rubber ring 610 and the second rubber ring from the upper part, the supporting seat 800 can support the first rubber ring 610 and the second rubber ring 620 from the lower part, thus the gap between the rubber ring and the upper shell can be filled by wrapping the upper shell 201 and supporting the supporting seat 800, seamless lap joint between the rubber ring and the upper shell is realized, the gap between the rubber ring and the lower shell is filled by the supporting seat 800, seamless lap joint between the rubber ring and the lower shell is realized, wherein the supporting seat 800 is arranged on the surface of the lower shell 202, the lower surfaces of the first rubber ring 610 and the second rubber ring 620 are in contact connection with the supporting seat 800, the supporting seat 800 is in contact connection with the lower shell 202, and further seamless lap joint between the first rubber ring 610 and the second rubber ring 620 and the lower shell 202 is realized; further, the conductive cloth 900 can be arranged between the supporting seat 800 and the lower shell 202 to further fill the gap between the supporting seat 800 and the lower shell 202, so that accurate seamless lap joint between the lower surface of the rubber ring, the supporting seat 800, the conductive cloth 900 and the lower shell 202 is ensured.

Like this, the upper surface of first rubber circle 610 and second rubber circle 620 is lived by last casing 201 parcel, and the lower surface is by supporting seat 800 support column, and then realizes reaching the electromagnetic radiation that shields emission of light secondary module and light receiving secondary module between to the light mouth through first rubber circle 610 and second rubber circle 620, blocks up the electromagnetism promptly and reaches the route of light mouth. Because the rubber ring has certain elasticity, can realize with last casing and soft sealing between the supporting seat, avoid the gap that hard contact produced.

Meanwhile, the first rubber ring 610 and the second rubber ring 620 are made of conductive rubber, the conductive rubber can enable the grounding effect of the upper shell 201 and the lower shell 202 to be better, and therefore electromagnetism penetrating through the first rubber ring 610 and the second rubber ring 620 can be discharged to the ground through the upper shell 201 and the lower shell 202.

The upper surfaces of the first rubber ring 610 and the second rubber ring 620 are wrapped by the upper shell 201, the lower surfaces of the first rubber ring 610 and the second rubber ring 620 are supported by the supporting seat 800, and therefore electromagnetic radiation between the light emission secondary module and the light receiving secondary module and the light port is shielded through the first rubber ring 610 and the second rubber ring 620, namely a path of the electromagnetic to the light port is blocked; the electromagnetic module can avoid electromagnetic leakage from the optical port to cause interference on electronic devices outside the optical module, realizes isolation and shielding of the electromagnetic inside the optical module, and further improves the electromagnetic shielding performance of the optical module.

The following description will be made with respect to a specific embodiment in which the upper case 201 covers the upper surfaces of the first rubber ring 610 and the second rubber ring 620, and the support base 800 supports the lower surfaces of the first rubber ring 610 and the second rubber ring 620, respectively.

Fig. 13 is a schematic diagram of a relative structure between an optical port shielding structure of an optical module and a lower housing according to an embodiment of the present application; fig. 14 is a schematic diagram of a relative structure between an optical port shielding structure of an optical module and an upper housing according to an embodiment of the present application; fig. 15 is a schematic view of an internal structure of an upper housing of an optical module according to an embodiment of the present application; as can be seen from fig. 13, the lower ends of the first rubber ring 610 and the second rubber ring 620 are supported by the supporting base 800, and then the gap between the supporting base 800 and the lower housing 202 is overlapped by the conductive cloth 900, so that no gap is left between the first rubber ring 610 and the second rubber ring 620 and the lower housing 202; fig. 14 and 15 show the structure of the upper case 201 for wrapping the upper surfaces of the first rubber ring 610 and the second rubber ring 620, and fig. 14 and 15 turn the upper case 201 in fig. 4 by 180 ° to better show the internal structure of the upper case 201, so as to obtain the structure in fig. 14 and 15. After the first rubber ring 610 and the second rubber ring 620 are added as described above, the space between the left support ring and the right support ring of the first adjustment sleeve 412 is divided into the first rubber ring 610, the first connection portion 611 and the right support ring 4122, and the space between the support rings of the light receiving housing 420 to the second adjustment sleeve 421 is divided into the second rubber ring 620, the second connection portion 621 and the support ring 4211, so that the structure of the upper housing 201 needs to have a wrapping structure capable of wrapping the divided structures, as shown in fig. 14 and 15, in order to wrap the upper surfaces of the first rubber ring 610, the first connection portion 611 and the right support ring 4122, the upper housing 201 is adaptively provided with a first rubber ring wrapping groove 2014, a first connection portion wrapping groove 2015 and a right support ring wrapping groove 2016, and the first rubber ring wrapping groove 2014, the first connection portion wrapping groove 2015 and the right support ring wrapping groove 2016 are used for wrapping the first rubber ring 610, the first connection portion wrapping groove 2015 and the right support ring wrapping groove 2016 respectively, The upper surfaces of the first connecting portion 611 and the right support ring 4122; in order to wrap the second rubber ring 620, the second connecting portion 621 and the support ring 4211, the upper shell 201 is adaptively provided with a second rubber ring wrapping groove 2011, a second connecting portion wrapping groove 2012 and a support ring wrapping groove 2013, and the second rubber ring wrapping groove 2011, the second connecting portion wrapping groove 2012 and the support ring wrapping groove 2013 are respectively used for wrapping the upper surfaces of the second rubber ring 620, the second connecting portion 621 and the support ring 4211.

Fig. 16 is a first schematic perspective view of a supporting base of an optical module according to an embodiment of the present disclosure; fig. 17 is a schematic perspective view illustrating a second three-dimensional structure of a supporting seat of an optical module according to an embodiment of the present application; the lower ends of the first rubber ring 610 and the second rubber ring 620 are supported by the supporting base 800, and then the gap between the supporting base 800 and the lower shell 202 is lapped through the conductive cloth 900, so that no gap is formed between the first rubber ring 610 and the second rubber ring 620 and the lower shell 202; therefore, the support base 800 in the embodiment of the present application needs to have a structure for supporting the lower ends of the first rubber ring 610 and the second rubber ring 620, the support base 800 has a structure as shown in fig. 16 and 17, in order to support the lower surfaces of the first rubber ring 610, the first connecting portion 611 and the right support ring 4122, the support base 800 is adaptively provided with a first rubber ring embedding groove 804, a first connecting portion embedding groove 805 and a right support ring embedding groove 806, and the first rubber ring embedding groove 804, the first connecting portion embedding groove 805 and the right support ring embedding groove 806 are respectively used for supporting the lower surfaces of the first rubber ring 610, the first connecting portion 611 and the right support ring 4122; in order to support the lower surfaces of the second rubber ring 620, the second connecting portion 621 and the support ring 4211, the support seat 800 is adaptively provided with a second rubber ring embedding groove 801, a second connecting portion embedding groove 802 and a support ring embedding groove 803, and the second rubber ring embedding groove 801, the second connecting portion embedding groove 802 and the support ring embedding groove 803 are respectively used for supporting the lower surfaces of the second rubber ring 620, the second connecting portion 621 and the support ring 4211. The effect of the supporting seat 800 supporting the first rubber ring 610 and the second rubber ring 620 is schematically shown in fig. 18.

Like this, the upper surface of first rubber circle 610 and second rubber circle 620 is lived by last casing 201 parcel, and the lower surface is by supporting seat 800 support column, and then realizes reaching the electromagnetic radiation that shields emission of light secondary module and light receiving secondary module between to the light mouth through first rubber circle 610 and second rubber circle 620, blocks up the electromagnetism promptly and reaches the route of light mouth.

As shown in fig. 16, the supporting base 800 further includes a first seat 807 and a second seat 808, and the arrangement of the first seat 807 and the second seat 808 can increase the stability of the supporting base 800 on the surface of the lower shell 202.

In the present embodiment, as described above, the shielding plate 700 is provided on the side wall of the right support ring 4122 of the first adjusting sleeve 412 near the first fiber optic adapter 510 and on the side wall of the support ring 4211 of the second adjusting sleeve 421 near the second fiber optic adapter 520; the supporting seat 800 supports the shielding plate 700 at the same time, the supporting schematic is shown in fig. 19, and it can be seen from fig. 19 that the supporting seat 800 supports the shielding plate 700, and the shielding plate is arranged to further shield the electromagnetic radiation from the optical port to the outside, so that the electromagnetic can be shielded doubly by the corresponding rubber ring and the shielding plate 700, and the electromagnetic shielding performance at the optical port is further improved.

Fig. 20 shows a structural schematic of the shielding plate 700, and as shown in fig. 20, the shielding plate 700 includes a first through hole 710 and a second through hole 720, the first through hole 710 is nested in the right support ring 4122 of the first adjusting sleeve 412 near the side wall of the first fiber optic adapter 510, and the second through hole 720 is nested in the support ring 4211 of the second adjusting sleeve 421 near the side wall of the second fiber optic adapter 520, so that the shielding plate 700 is disposed to further shield the electromagnetic waves radiated from the optical port to the outside, and thus the shielding plate 700 can double-shield the electromagnetic waves through the corresponding rubber rings, and further increase the electromagnetic shielding performance at the optical port.

Fig. 21 is a schematic view illustrating a connection manner between a supporting base and a shielding plate of an optical module according to an embodiment of the present disclosure; in the embodiment of the present application, in order to fix the shielding plate 700, a protrusion 730 is disposed on one side of the shielding plate 700 close to the right support ring, an inward recess 809 is disposed on the adaptive support base 800, and the shielding plate 700 is fixedly connected to the support base 800 through the connection between the protrusion 730 and the recess 809, so as to fix the shielding plate 700, thereby increasing the stability of the shielding plate 700.

Therefore, including circuit board, last casing, lower casing, the optical emission submodule and the optical reception submodule of being connected with the circuit board electricity in the optical module that this application provided, wherein, in order to improve the optical window shielding effect of optical module, increase optical window shielding structure in this application, optical window shielding structure includes: a first rubber ring arranged between the light emitting shell and the light port, a second rubber ring arranged between the light receiving shell and the light port, an upper shell corresponding structure designed for filling a gap between the rubber ring and the upper shell, and a support seat corresponding structure arranged for filling a gap between the rubber ring and the lower shell, the light port shielding structure can realize that the first rubber ring passes between the light emitting shell and the light port, the first rubber ring is connected with the upper shell and the lower shell in a seamless way, so that the light emitting shell is sealed from the light port, the electromagnetism generated by the light emitting part is prevented from radiating to the outside through the light port, and simultaneously, the second rubber ring is arranged between the light receiving shell and the light port, and the second rubber ring is connected with the upper shell and the lower shell in a seamless mode, so that the light receiving shell is sealed from the light port, and the electromagnetism generated by the light receiving portion is prevented from radiating to the outside through the light port. The optical port shielding effect of the optical module can be improved, and the electromagnetic shielding performance of the optical module is further improved. The setting of shield plate can further shield electromagnetism and radiate to the outside from light mouthful department, can double-shielded electromagnetism through corresponding rubber circle, shield plate like this, further increases the electromagnetic shielding performance of light mouthful department.

In summary, the optical port electromagnetic shielding structure provided by the application can avoid electromagnetic leakage from the optical port to interfere with electronic devices outside the optical module, realize isolation and shielding of the electromagnetic inside the optical module, and further improve the electromagnetic shielding performance of the optical module.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A light module, comprising:

a circuit board;

a lower housing;

2. The optical module of claim 1, wherein the tosa comprises, in order, the tosa, a seal-welded tube, a first adjusting sleeve, and a first fiber adapter, wherein the first adjusting sleeve comprises a left support ring and a right support ring;

the light receiving submodule sequentially comprises the light receiving shell, a second adjusting sleeve and a second optical fiber adapter, wherein the second adjusting sleeve comprises a support ring;

the first rubber ring is arranged on the side wall of the left support ring;

the second rubber ring is arranged on the side wall of the light receiving shell.

3. The optical module according to claim 2, wherein a first rubber ring and a first connecting portion are sequentially arranged between the left support ring and the right support ring;

a second rubber ring and a second connecting part are sequentially arranged between the light receiving shell and the support ring of the second adjusting sleeve;

the first rubber ring and the second rubber ring are consistent in size;

the outer diameters and the widths of the first connection part and the second connection part are consistent;

the outer diameters and the widths of the right support ring and the support ring of the second adjusting sleeve are consistent.

4. The optical module according to claim 3, wherein a distance between the left and right support rings and a distance between the light receiving housing and the support ring of the second adjustment sleeve are the same, and inner diameters of a circular sleeve formed by the left and right support rings and a circular sleeve formed by the support ring of the light receiving housing and the support ring of the second adjustment sleeve are the same.

5. The optical module according to claim 3, wherein the support base is configured to support a lower surface of the first rubber ring, and includes a first rubber ring embedding groove, a first connecting portion embedding groove, and a right support ring embedding groove;

the supporting seat is also used for supporting the lower surface of the second rubber ring and comprises a second rubber ring embedding groove, a second connecting part embedding groove and a supporting ring embedding groove;

the second rubber ring is embedded with a groove, the second connecting part is embedded with a groove, and the support ring is embedded with a groove which is used for supporting the second rubber ring, the second connecting part and the lower surface of the support ring of the second adjusting sleeve respectively.

6. The optical module according to claim 3, wherein the upper housing is configured to wrap an upper surface of the first rubber ring, and includes a first rubber ring wrapping groove, a first connecting portion wrapping groove, and a right supporting ring wrapping groove;

the upper shell is also used for wrapping the upper surface of the second rubber ring and comprises a second rubber ring wrapping groove, a second connecting part wrapping groove and a support ring wrapping groove;

the second rubber ring wrapping groove, the second connecting part wrapping groove and the support ring wrapping groove are respectively used for wrapping the upper surfaces of the second rubber ring, the second connecting part and the support ring of the second adjusting sleeve.

7. The optical module according to claim 1, wherein a gap between the lower surface of the support base and the upper surface of the lower housing is filled with a conductive cloth, and the conductive cloth is used for filling a gap between the support base and the lower housing.

8. The optical module according to claim 3, wherein a shielding plate is disposed on an outer wall of the support ring of the second adjusting sleeve and an outer wall of the right support ring, and the shielding plate is disposed on a surface of the support seat.

9. The optical module according to claim 8, wherein a side of the shielding plate adjacent to the right support ring is provided with a protrusion; the supporting seat is provided with an inward depressed part, and the connection between the shielding plate and the supporting seat is realized through the connection between the protruding part and the depressed part.

10. The optical module of claim 8, wherein the shield plate includes a first through hole nested in a right support ring of the first adjustment sleeve proximate a side wall of the first fiber optic adapter, and a second through hole nested in a support ring of the second adjustment sleeve proximate a side wall of the second fiber optic adapter.