CN114077017A - Optical module - Google Patents
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- CN114077017A CN114077017A CN202010811010.9A CN202010811010A CN114077017A CN 114077017 A CN114077017 A CN 114077017A CN 202010811010 A CN202010811010 A CN 202010811010A CN 114077017 A CN114077017 A CN 114077017A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
- G02B6/4277—Protection against electromagnetic interference [EMI], e.g. shielding means
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Abstract
The application discloses an optical module, which comprises a shell, an elastic sleeve and a conductive fiber sheet, wherein the outer wall of the shell is provided with a groove, the elastic sleeve comprises a metal frame sleeved in the groove and a plurality of metal elastic sheets arranged at the edge of the metal frame, the conductive fiber sheet comprises a conductive frame and a conductive elastic piece arranged at the edge of the conductive frame, the conductive frame is arranged between the shell and the metal frame and comprises a first conductive sheet, a second conductive sheet and a third conductive sheet, the second conductive sheet and the third conductive sheet are respectively connected with the first conductive sheet, the first conductive sheet is clamped into the groove at the upper end surface of the shell, the second conductive sheet is clamped into the groove at the left end surface of the shell, and the third conductive sheet is clamped into the groove at the right end surface of the shell; the conductive elastic piece is arranged in a ladder shape with the conductive frame and is abutted with the metal elastic piece. This application sets up elastic sleeve and conductive fiber piece in the casing outside for block up the clearance between casing and the cage, ensure casing and cage abundant contact, form airtight cavity, avoid the electromagnetic wave that the optical module produced to reveal away, play good shielding effect.
Description
Technical Field
The application relates to the technical field of optical communication, in particular to an optical module.
Background
In the novel business and application modes of cloud computing, mobile internet, video and the like, an optical communication technology is used, and in optical communication, an optical module is a tool for realizing the interconversion of photoelectric signals and is one of key devices in optical communication equipment. The optical module is mainly used for photoelectric and electro-optical conversion, an electric signal is converted into an optical signal by a transmitting end of the optical module and is transmitted out through an optical fiber, and a received optical signal is converted into an electric signal by a receiving end of the optical module.
When the pluggable optical module is used, an electric port of the optical module is generally inserted into an electric connector inside a cage of an optical network terminal, the optical module is inserted into the cage, the cage fixes the optical module, a shell of the optical module is in contact with the inner surface of the cage to form a closed cavity, and therefore electromagnetic waves generated by the optical module are shielded in the closed cavity and cannot leak out of the cage.
However, since the housing of the optical module and the cage are both made of metal and are in point contact with each other, a gap is formed between the housing of the optical module and the inner surface of the cage, and electromagnetic waves in the optical module leak out of the cage through the gap, thereby causing interference with other nearby electronic devices.
Disclosure of Invention
The application provides an optical module for improving the external electromagnetic shielding effect of the optical module.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
the embodiment of the application discloses an optical module, includes:
the outer wall of the shell is provided with a groove;
the elastic sleeve comprises a metal frame and a plurality of metal elastic sheets, the metal frame is sleeved in the groove, and the metal frame is fixed at the bottom of the shell; the metal elastic sheet is arranged at the edge of the metal frame;
the conductive fiber sheet is arranged between the shell and the metal frame and is used for connecting the shell and the elastic sleeve;
wherein the conductive fiber sheet includes:
the conductive frame is arranged between the shell and the metal frame and comprises a first conductive sheet, a second conductive sheet and a third conductive sheet, and two ends of the first conductive sheet are respectively connected with the second conductive sheet and the third conductive sheet; the first conducting plate is clamped in a groove on the upper end face of the shell, the second conducting plate is clamped in a groove on the left end face of the shell, and the third conducting plate is clamped in a groove on the right end face of the shell;
the conductive elastic piece is arranged at the edge of the conductive frame, the conductive elastic piece and the conductive frame are arranged in a ladder shape, and the conductive elastic piece is abutted to the metal elastic sheet.
The application provides an optical module, which comprises a shell, an elastic sleeve and a conductive fiber sheet, wherein a groove is formed in the outer wall of the shell; the elastic sleeve comprises a metal frame and a plurality of metal elastic sheets, and the metal frame is sleeved in the groove and fixed at the bottom of the shell; the metal elastic sheet is arranged at the edge of the metal frame; the conductive fiber sheet is arranged between the shell and the metal frame and is used for connecting the shell and the elastic sleeve; the conductive fiber sheet comprises a conductive frame and a conductive elastic piece, the conductive frame is arranged between the shell and the metal frame and comprises a first conductive sheet, a second conductive sheet and a third conductive sheet, and two ends of the first conductive sheet are respectively connected with the second gasket and the third conductive sheet; the first conducting plate is clamped in a groove on the upper end surface of the shell, the second conducting plate is clamped in a groove on the left end surface of the shell, and the third conducting plate is clamped in a groove on the right end surface of the shell; the conductive elastic piece is arranged at the edge of the conductive frame, the conductive elastic piece and the conductive frame are arranged in a ladder shape, and the conductive elastic piece is abutted to the metal elastic sheet. According to the application, an elastic sleeve and a conductive fiber sheet are additionally arranged between a shell of an optical module and an external cage, and the conductive fiber sheet is attached to the shell of the optical module on the inner side of the elastic sleeve and fully contacted with the elastic sleeve and the shell so as to block a gap between the shell and the elastic sleeve; the metal shrapnel on the elastic sleeve can be withstood to the electrically conductive elastic component on the conductive fiber piece, when inserting the optical module into the cage, the metal shrapnel is withstood by the electrically conductive elastic component, make metal shrapnel card in the outside socket department of cage, ensure metal shrapnel and outside cage full contact, in order to block up the gap of elastic sleeve and cage medial surface, thereby make the inside airtight cavity that forms of cage, avoid the electromagnetic wave that the optical module produced to leak to the cage outside, play good shielding effect, prevent that it from causing electromagnetic interference to other electronic equipment in near place.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that 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 view of an optical module provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of an elastic sleeve in an optical module provided in the embodiment of the present application;
fig. 6 is another schematic angle diagram of a housing in an optical module according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a conductive fiber sheet in an optical module provided in an embodiment of the present application;
fig. 8 is an assembly schematic diagram of a conductive fiber sheet and a housing in an optical module provided in the embodiment of the present application;
fig. 9 is an assembly schematic diagram of an elastic sleeve, a conductive fiber sheet, and a housing in an optical module provided in the embodiment of the present application;
fig. 10 is a schematic view illustrating assembly of an elastic sleeve, a conductive fiber sheet, and a housing at another angle in an optical module according to an embodiment of the present disclosure;
fig. 11 is an enlarged view of a portion a in fig. 10.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, 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 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. 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 first boss portion 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 according to an embodiment of the present application, and fig. 4 is an exploded schematic diagram of the optical module according to the embodiment of the present application. As shown in fig. 3 and 4, the optical module 200 provided in the embodiment of the present application includes a housing and an elastic sleeve 300, where the housing includes an upper housing 201 and a lower housing 202, and the upper housing 201 is covered on the lower housing 202 to form a package cavity with two openings; the outer contour of the packaging cavity generally presents a square body. Specifically, the lower housing 202 includes a main board and two side boards located at two sides of the main board and arranged perpendicular to the main board; 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 may further include two side walls disposed at two sides of the cover plate and perpendicular to the cover plate, and the two side walls are combined with the two side plates to cover the upper shell 201 on the lower shell 202.
The two openings can be two end openings (204, 205) located at the same end of the optical module, or two openings located at different ends of the optical module; one opening is an electric port 204, and a gold finger of the circuit board extends out of the electric port 204 and is inserted into an upper computer such as an optical network terminal; the other opening is an optical port 205 for external optical fiber access to connect with an optical receiving device inside the optical module; photoelectric devices such as a circuit board, a light emitting device, a light receiving device and the like are positioned in the packaging cavity.
The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board, the light emitting device, the light receiving device and other devices can be conveniently installed in the shell, and the upper shell and the lower shell form the packaging protection shell at the outermost layer of the module; the upper shell and the lower shell are made of metal materials generally, electromagnetic shielding and heat dissipation are achieved, the shell of the optical module cannot be made into an integral component generally, and therefore when devices such as a circuit board are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component cannot be installed, and production automation is not facilitated.
The optical module provided by the embodiment of the application may further include an unlocking component, and the unlocking component is located on the outer wall of the package cavity/lower housing 202 and 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 is provided with a clamping component 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 component of the unlocking component; by pulling the unlocking component, the clamping component of the unlocking component moves along with the unlocking component, so that the connection relation between the clamping component 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 circuit board is provided with circuit wiring, electronic elements (such as a capacitor, a resistor, a triode and an MOS tube), chips (such as an MCU, a laser driving chip, a limiting amplification chip, a clock data recovery CDR, a power management chip and a data processing chip DSP) and the like.
The circuit board is used for providing signal circuits for signal electrical connection, and the signal circuits can provide signals. The circuit board connects the electrical appliances in the optical module together according to the circuit design through circuit wiring to realize the functions of power supply, electrical signal transmission, grounding and the like.
The circuit board is generally a hard circuit board, and the hard circuit board can also realize a bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear a chip; when the optical transceiver component is positioned on the circuit board, the rigid circuit board can also provide stable bearing; 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.
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 module by using the flexible circuit board.
In order to prevent electromagnetic waves generated by the optical module from leaking from a gap between the housing and the outer cage 106, a conductive piece can be arranged between the housing of the optical module and the outer cage 106, so as to eliminate the gap between the housing and the outer cage 106 and achieve an expected electromagnetic shielding effect, the embodiment of the application provides an optical module, which can be a pluggable optical module, and further comprises an elastic sleeve 300 and a conductive fiber sheet 400, wherein a groove is formed in the outer wall of the housing, the elastic sleeve 300 is sleeved on the groove of the housing and is fixed at the bottom of the housing and is used for connecting the housing and the cage 106 so as to ensure sufficient contact between the housing and the cage 106 and block the gap between the housing and the cage 106; the conductive fiber sheet 400 is disposed between the housing and the elastic sleeve 300 for connecting the housing and the elastic sleeve 300, so that the elastic sleeve 300 is in full contact with the housing to block the gap between the housing and the elastic sleeve 300, thereby further improving the full contact between the housing and the cage 106.
Specifically, a second groove 2010 is arranged on the outer wall of the upper housing 201, a first groove 2020 is arranged on the outer wall of the lower housing 202, the first groove 2020 and the second groove 2010 form a groove of the housing, the groove surrounds the outer wall of the optical module housing for a circle, and the elastic sleeve 300 is sleeved in the groove. When the pluggable optical module is inserted into the cage 106, the elastic sleeve 300 contacts with the inner surface of the cage 106, so that a gap between the housing and the inner surface of the cage 106 can be blocked, that is, a closed cavity is formed between the housing and the cage 106 through the elastic sleeve 300, so that electromagnetic waves generated by the optical module are shielded in the closed cavity, and the electromagnetic waves are prevented from leaking to the outer side of the cage 106.
Fig. 5 is a schematic structural diagram of an elastic sleeve 300 in an optical module according to an embodiment of the present application. As shown in fig. 5, the elastic sleeve 300 includes a metal frame and a plurality of metal elastic pieces 306, the metal frame is sleeved in the groove of the housing and fully contacts with the housing; the metal clips 306 are evenly disposed at the edge of the metal frame, and the outer surface of the metal clips contacts the inner surface of the cage 106. When the pluggable optical module is inserted into the cage 106, the metal clips 306 are pressed by the inner surface of the cage 106 to be elastically deformed and clamped at the socket of the cage 106, so as to block the gap between the housing and the cage 106.
The metal frame comprises a first side plate 301, a second side plate 302, a third side plate 303, a fourth side plate 304 and a fifth side plate 305, wherein the second side plate 302 and the third side plate 303 are symmetrically arranged relative to the first side plate 301, the fourth side plate 304 and the fifth side plate 305 are symmetrically arranged relative to the first side plate 301, two ends of the second side plate 302 are respectively connected with the first side plate 301 and the fourth side plate 304, and two ends of the third side plate 303 are respectively connected with the first side plate 301 and the fifth side plate 305; the fourth side plate 304 and the fifth side plate 305 are located in the same plane, and a gap is formed between the fourth side plate 304 and the fifth side plate 305. That is, the first side plate 301, the second side plate 302, the third side plate 303, the fourth side plate 304 and the fifth side plate 305 form a C-shaped metal member, and the metal frame can be sleeved in the groove through a gap between the fourth side plate 304 and the fifth side plate 305.
When the metal frame is nested in the groove, the first side plate 301 of the metal frame is clamped into the groove on the top surface of the upper casing 201, the second side plate 302 is clamped into the grooves on the left side surface of the upper casing 201 and the left side surface of the lower casing 202, the third side plate 303 is clamped into the grooves on the right side surface of the upper casing 201 and the right side surface of the lower casing 202, the fourth side plate 304 is clamped into the groove on the bottom surface of the lower casing 202, and the fifth side plate 305 is clamped into the groove on the bottom surface of the lower casing 202.
Fig. 6 is another angle schematic diagram of a housing in an optical module according to an embodiment of the present application. As shown in fig. 6, the grooves on the bottom surface of the lower casing 202 are symmetrically provided with slots 2021, the fourth side plate 304 and the fifth side plate 305 of the metal frame are respectively provided with an elastic buckle 308, and the elastic buckle 308 is fixedly connected with the slots 2021. That is, when the metal frame is clamped into the groove of the housing, the elastic fasteners 308 on the fourth side plate 304 and the fifth side plate 305 are clamped into the clamping grooves 2021 on the bottom surface of the lower housing 202, so as to fix the metal frame and the lower housing 202, and thus the upper housing 201 and the lower housing 202 are wrapped in the metal frame.
In this example, the elastic buckles 308 on the fourth side plate 304 and the fifth side plate 305 of the metal frame can be punched out by stamping, so that one side of the elastic buckle 308 is connected with the fourth side plate 304. After the elastic buckle 308 is clamped into the clamping groove 2021 on the bottom surface of the lower housing 202, the elastic buckle 308 can be pressed to separate the elastic buckle 308 from the clamping groove 2021, so that the elastic sleeve 300 can be conveniently detached.
The metal elastic sheet 306 is uniformly disposed on the edges of the first side plate 301, the second side plate 302, the third side plate 303, the fourth side plate 304 and the fifth side plate 305 of the metal frame, and the metal elastic sheet 306 extends outwards along the edges of the first side plate 301, the second side plate 302, the third side plate 303, the fourth side plate 304 and the fifth side plate 305, and is disposed in an umbrella shape.
The number of the metal elastic pieces 306 arranged at the edges of the first side plate 301, the second side plate 302, the third side plate 303, the fourth side plate 304 and the fifth side plate 305 is not limited, and the number of the metal elastic pieces 306 can be set as much as possible according to actual conditions so as to increase the contact area between the elastic sleeve 300 and the cage 106.
After the elastic sleeve 300 is sleeved in the groove of the housing, the metal frame of the elastic sleeve 300 contacts with the outer walls of the upper housing 201 and the lower housing 202, and the metal shrapnel 306 of the elastic sleeve 300 contacts with the inner side surface of the cage 106, so that the contact between the housing and the cage 106 is realized. The elastic sleeve 300 is a metal member, and a closed metal cavity is formed between the housing, the elastic sleeve 300 and the cage 106, so that electromagnetic waves between the cage 106 and the housing are shielded to prevent the electromagnetic waves from leaking out of the cage 106.
Because the metal frame of elastic sleeve 300 is in surface contact with the housing, a gap is easily formed between the metal frame and the housing, and electromagnetic waves are leaked out from the gap between the metal frame and the housing, conductive fiber sheet 400 is arranged between elastic sleeve 300 and the housing of the optical module provided by the embodiment of the application, and the gap between the metal frame and the housing of the optical module can be blocked by conductive fiber sheet 400.
Fig. 7 is a schematic structural diagram of a conductive fiber sheet 400 in an optical module provided in the embodiment of the present application. As shown in fig. 7, the conductive fiber sheet 400 includes a conductive frame and a conductive elastic member, the conductive frame includes a first conductive sheet 401, a second conductive sheet 402 and a third conductive sheet 403, and the second conductive sheet 402 and the third conductive sheet 403 are symmetrically disposed with respect to the first conductive sheet 401. The two ends of the first conductive sheet 401 are connected to the second conductive sheet 402 and the third conductive sheet 403, respectively, and the second conductive sheet 402 and the third conductive sheet 403 are perpendicular to the first conductive sheet 401, respectively. That is, the first conductive sheet 401, the second conductive sheet 402 and the third conductive sheet 403 form a C-shaped conductive member, and the conductive fiber sheet 400 can be sleeved in the groove of the optical module housing through the lower opening.
Because the elastic buckle 308 is arranged on the fourth side plate 304 and the fifth side plate 305 of the metal frame, it is inconvenient to arrange the conductive sheets between the bottom surface of the lower shell 202 and the fourth side plate 304 and the fifth side plate 305, so the conductive fiber sheet 400 is composed of three conductive sheets, the whole structure is a C-shaped structure, and the conductive fiber sheet 400 is conveniently clamped into the groove of the shell.
Fig. 8 is an assembly schematic diagram of a conductive fiber sheet 400 and an optical module housing in an optical module provided in the embodiment of the present application, and fig. 9 is an assembly schematic diagram of an elastic sleeve 300, a conductive fiber sheet 400 and an optical module housing in an optical module provided in the embodiment of the present application. As shown in fig. 8 and 9, when the conductive fiber sheet 400 is clamped in the groove of the optical module housing, the first conductive sheet 401 of the conductive fiber sheet 400 is clamped in the groove on the top surface of the upper housing 201, the second conductive sheet 402 is clamped in the grooves on the left side surface of the upper housing 201 and the left side surface of the lower housing 202, and the third conductive sheet 403 is clamped in the grooves on the right side surface of the upper housing 201 and the right side surface of the lower housing 202.
When the conductive fiber sheet 400 is sleeved in the groove of the optical module housing, the conductive fiber sheet 400 may be higher than the depth of the groove, that is, the conductive fiber sheet 400 is higher than the surface of the optical module housing, so that the conductive fiber sheet 400 can be compressed into the groove by the elastic sleeve 300, thereby forming a good electrical connection between the elastic sleeve 300 and the optical module housing, and making the conductive fiber sheet 400 fully contact with the housing and the elastic sleeve 300, respectively, thereby ensuring that the optical module housing is fully conducted with the elastic sleeve 300.
In this example, the size of the first conductive sheet 401 in the conductive fiber sheet 400 may be equal to or slightly smaller than the size of the first side plate 301 in the metal frame, the size of the second conductive sheet 402 may be equal to or slightly smaller than the size of the second side plate 302, and the size of the third conductive sheet 403 may be equal to or slightly smaller than the size of the third side plate 303, so that the size of the conductive fiber sheet 400 is almost the same as that of the metal frame, and the gap between the elastic sleeve 300 and the optical module housing may be effectively blocked.
Since the metal frame of the elastic sleeve 300 is in surface contact with the conductive fiber sheet 400, a plurality of concave points 307 may be uniformly disposed on the first side plate 301, the second side plate 302, and the third side plate 303 of the metal frame, respectively, and the concave points 307 are in contact with the outer surface of the conductive fiber sheet 400. The metal frame is provided with the concave points 307, so that the contact area between the metal frame and the conductive fiber sheet 400 can be increased, and the metal frame and the conductive fiber sheet 400 are ensured to be in full contact.
In this example, the concave points 307 on the first side plate 301, the second side plate 302 and the third side plate 303 can be punched out by stamping, and the concave points 307 are blind holes, so that the contact between the metal frame and the conductive fiber sheet 400 is point contact, the resistance between the metal frame and the conductive fiber sheet 400 is low, and sufficient conduction between the metal frame and the conductive fiber sheet 400 is ensured.
Fig. 10 is an assembly side view of an elastic sleeve 300, a conductive fiber sheet 400 and an optical module housing in an optical module according to an embodiment of the present application, and fig. 11 is an enlarged schematic view of a position a in fig. 10. As shown in fig. 10 and 11, an electrically conductive elastic member 404 is disposed at one end of the first electrically conductive plate 401 of the electrically conductive fiber sheet 400, the electrically conductive elastic member 404 is disposed along the length direction of the first electrically conductive plate 401 and is located below the metal elastic sheet 306 of the elastic sleeve 300, the electrically conductive elastic member 404 is disposed in a step shape with the first electrically conductive plate 401 of the electrically conductive frame, and the rest of the metal elastic sheets 306 are abutted to abut against the metal elastic sheet 306 to ensure that the metal elastic sheet 306 contacts with the inner surface of the cage 106.
In this example, the conductive elastic member 404 may include an upper top surface contacting the metal spring 306, a lower bottom surface fixed to the first conductive plate 401, and an arc surface connecting the upper top surface and the lower bottom surface. A conductive boss may be disposed on one side of the first conductive plate 401, a through hole is disposed inside the conductive boss, the through hole is disposed along the length direction of the first conductive plate 401, and the conductive elastic member 404 is inserted into the through hole for supporting the metal elastic sheet 306.
In order to be able to prop against the metal dome 306, the thickness of the conductive elastic member 404 is not less than the thickness of the metal dome 306, that is, the thickness of the conductive elastic member 404 is greater than or equal to the distance from the highest position to the lowest position of the metal dome 306, so as to prop up the metal dome 306. When the optical module is inserted into the cage 106, the inner surface of the cage 106 presses the metal elastic sheet 306, because the conductive elastic member 404 has elasticity, the metal elastic sheet 306 presses the conductive elastic member 404, the conductive elastic member 404 presses the conductive fiber sheet 400, and the conductive fiber sheet 400 presses the optical module housing, so that a gap between the elastic sleeve 300 and the cage 106, a gap between the elastic sleeve 300 and the conductive fiber sheet 400, and a gap between the conductive fiber sheet 400 and the housing can be effectively blocked.
In this example, the conductive elastic member 404 may be a conductive foam, that is, the conductive cloth is wound outside the foam, the elasticity of the conductive foam is good, and when the conductive fiber sheet 400 is clamped into the groove of the housing and the elastic sleeve 300 is mounted, the compression degree of the conductive foam is large, thereby avoiding inconvenience caused by mounting the elastic sleeve 300.
The assembling process of the optical module provided by the embodiment of the application is as follows: firstly, photoelectric devices such as a circuit board, a light emitting device, a light receiving device and the like of the optical module are installed in a lower shell 202, and then the upper shell 201 is covered to complete the integral installation of the optical module; then, the conductive fiber sheet 400 is clamped into the grooves on the outer walls of the upper shell 201 and the lower shell 202; then, the elastic sleeve 300 is sleeved outside the conductive fiber sheet 400, the conductive elastic member 404 on the conductive fiber sheet is positioned below the metal elastic sheet 306, and the elastic sleeve 300 is clamped into the clamping groove 2021 of the lower housing 202 through the elastic buckle 308 to fix the elastic sleeve 300.
After the optical module is assembled, when the optical module is inserted into the outer cage 106, the inner surface of the cage 106 presses the metal elastic sheet 306 of the elastic sleeve 300, and the conductive elastic piece 404 below the metal elastic sheet 306 supports against the metal elastic sheet 306, so that the metal elastic sheet 306 and the cage 106 form good electrical contact, and a gap between the elastic sleeve 300 and the cage 106 can be eliminated; meanwhile, the conductive fiber sheet 400 is located between the elastic sleeve 300 and the optical module housing, so that the elastic sleeve 300 and the optical module housing form a good electrical contact, a gap between the elastic sleeve 300 and the optical module housing can be eliminated, a good electrical contact is formed between the optical module housing and the cage 106, a metal sealing cavity is formed, efficient shielding is achieved, electromagnetic waves between the optical module housing and the cage 106 are shielded, and the electromagnetic waves cannot be radiated out from the cage 106 to affect other electro-optical devices.
According to the optical module, the elastic sleeve and the conductive fiber sheet are additionally arranged between the shell of the optical module and the outer cage, the conductive fiber sheet is attached to the shell of the optical module on the inner side of the elastic sleeve and is in full contact with the elastic sleeve and the shell, and the elastic sleeve is ensured to be fully communicated with the shell so as to block a gap between the shell and the elastic sleeve; the conductive elastic piece on the conductive fiber piece can be propped against the metal elastic piece on the elastic sleeve, so that the metal elastic piece is ensured to be fully contacted with the external cage to block a gap between the elastic sleeve and the inner side surface of the cage, so that the optical module shell is fully contacted with the external cage, the optical module shell and the external cage form a closed cavity, electromagnetic waves generated by the optical module are prevented from being leaked outside the cage, and a good shielding effect is achieved.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (10)
1. A light module, comprising:
the outer wall of the shell is provided with a groove;
the elastic sleeve comprises a metal frame and a plurality of metal elastic sheets, the metal frame is sleeved in the groove, and the metal frame is fixed at the bottom of the shell; the metal elastic sheet is arranged at the edge of the metal frame;
the conductive fiber sheet is arranged between the shell and the metal frame and is used for connecting the shell and the elastic sleeve;
wherein the conductive fiber sheet includes:
the conductive frame is arranged between the shell and the metal frame and comprises a first conductive sheet, a second conductive sheet and a third conductive sheet, and two ends of the first conductive sheet are respectively connected with the second conductive sheet and the third conductive sheet; the first conducting plate is clamped in a groove on the upper end face of the shell, the second conducting plate is clamped in a groove on the left end face of the shell, and the third conducting plate is clamped in a groove on the right end face of the shell;
the conductive elastic piece is arranged at the edge of the conductive frame, the conductive elastic piece and the conductive frame are arranged in a ladder shape, and the conductive elastic piece is abutted to the metal elastic sheet.
2. The optical module of claim 1, wherein the conductive elastic member is disposed on the first conductive sheet, and the conductive elastic member is disposed along a length direction of the first conductive sheet.
3. The optical module of claim 1, wherein the thickness of the conductive elastic member is not less than the thickness of the metal dome.
4. The optical module of claim 1, wherein the conductive elastic member is a conductive foam.
5. The light module of claim 1, wherein the conductive fiber sheet is resilient.
6. The optical module according to claim 1, wherein the metal frame includes a first side plate, a second side plate, a third side plate, a fourth side plate and a fifth side plate, the second side plate and the third side plate are symmetrically disposed, the fourth side plate and the fifth side plate are symmetrically disposed, two ends of the second side plate are respectively connected to the first side plate and the fourth side plate, and two ends of the third side plate are respectively connected to the first side plate and the fifth side plate;
the fourth side plate and the fifth side plate are located in the same plane, a gap is formed between the fourth side plate and the fifth side plate, and the metal frame is sleeved on the outer side of the conductive frame through the gap.
7. The optical module according to claim 6, wherein the metal domes are uniformly disposed on edges of the first side plate, the second side plate, the third side plate, the fourth side plate, and the fifth side plate.
8. The optical module according to claim 6, wherein an inner surface of the first side plate is in contact with an outer surface of the first conductive sheet, an inner surface of the second side plate is in contact with an outer surface of the second conductive sheet, and an inner surface of the third side plate is in contact with an outer surface of the third conductive sheet.
9. The optical module according to claim 6, wherein elastic buckles are respectively disposed on the fourth side plate and the fifth side plate, and a clamping groove corresponding to the elastic buckle is disposed on a bottom surface of the housing, and the elastic buckle is fixedly connected with the clamping groove.
10. The optical module according to claim 6, wherein a plurality of concave points are respectively disposed on the first side plate, the second side plate and the third side plate, and the concave points are in contact with an outer surface of the conductive fiber sheet.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811010.9A CN114077017A (en) | 2020-08-13 | 2020-08-13 | Optical module |
| PCT/CN2021/100971 WO2022033173A1 (en) | 2020-08-13 | 2021-06-18 | Optical module |
| US17/897,589 US20220413238A1 (en) | 2020-08-13 | 2022-08-29 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811010.9A CN114077017A (en) | 2020-08-13 | 2020-08-13 | Optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114077017A true CN114077017A (en) | 2022-02-22 |
Family
ID=80280953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010811010.9A Withdrawn CN114077017A (en) | 2020-08-13 | 2020-08-13 | Optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114077017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077726A1 (en) * | 2022-10-11 | 2024-04-18 | 武汉光迅科技股份有限公司 | Module with network interface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202979572U (en) * | 2012-12-17 | 2013-06-05 | 深圳新飞通光电子技术有限公司 | Electromagnetic interference shielding clip of pluggable optical transceiving module |
| CN203691413U (en) * | 2014-01-10 | 2014-07-02 | 深圳新飞通光电子技术有限公司 | Anti-electromagnetic interference light transceiver module |
| CN203691856U (en) * | 2013-12-23 | 2014-07-02 | 深圳新飞通光电子技术有限公司 | Metal shielding clip |
| CN203708259U (en) * | 2014-03-06 | 2014-07-09 | 深圳新飞通光电子技术有限公司 | Anti-electromagnetic interference SFP light transmit-receive module |
| CN105403964A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Pluggable optical module |
| CN106772833A (en) * | 2016-12-07 | 2017-05-31 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN210690883U (en) * | 2019-11-11 | 2020-06-05 | 东莞市意兆电子科技有限公司 | SFP optical module structure |
-
2020
- 2020-08-13 CN CN202010811010.9A patent/CN114077017A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202979572U (en) * | 2012-12-17 | 2013-06-05 | 深圳新飞通光电子技术有限公司 | Electromagnetic interference shielding clip of pluggable optical transceiving module |
| CN203691856U (en) * | 2013-12-23 | 2014-07-02 | 深圳新飞通光电子技术有限公司 | Metal shielding clip |
| CN203691413U (en) * | 2014-01-10 | 2014-07-02 | 深圳新飞通光电子技术有限公司 | Anti-electromagnetic interference light transceiver module |
| CN203708259U (en) * | 2014-03-06 | 2014-07-09 | 深圳新飞通光电子技术有限公司 | Anti-electromagnetic interference SFP light transmit-receive module |
| CN105403964A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信宽带多媒体技术有限公司 | Pluggable optical module |
| CN106772833A (en) * | 2016-12-07 | 2017-05-31 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN210690883U (en) * | 2019-11-11 | 2020-06-05 | 东莞市意兆电子科技有限公司 | SFP optical module structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077726A1 (en) * | 2022-10-11 | 2024-04-18 | 武汉光迅科技股份有限公司 | Module with network interface |
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Application publication date: 20220222 |