CN212647091U

CN212647091U - Optical module

Info

Publication number: CN212647091U
Application number: CN202021793499.3U
Authority: CN
Inventors: 刘旭霞; 崔伟; 马晓磊; 杨思更
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-02
Anticipated expiration: 2030-08-25

Abstract

The application discloses an optical module, which comprises a circuit board, a lens assembly, an optical fiber assembly and a metal clip, wherein the circuit board is provided with a jack; the optical fiber assembly comprises an optical fiber inserting core, an internal optical fiber and an optical fiber adapter which are connected in sequence, the optical fiber inserting core is inserted into the lens assembly, and the optical fiber adapter is used for connecting the external optical fiber; the metal clip is arranged between the optical fiber adapter and the end face of the optical fiber ferrule, one side of the metal clip is abutted against the end face of the optical fiber ferrule, and the bottom end of the metal clip is inserted into the jack; the side surface of the metal clip, which is abutted against the end surface of the optical fiber plug core, is provided with an opening, and the internal optical fiber passes through the opening and is inserted into the optical fiber plug core. This application adds the metal clip between optical fiber adapter and optic fibre lock pin, one side of metal clip and the terminal surface looks butt of optic fibre lock pin, and in the plug hole on the bottom insert circuit board of metal clip, has avoided optic fibre lock pin to remove for the optical coupling butt joint between lens subassembly and optic fibre subassembly is more stable.

Description

Optical module

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.

The existing optical module comprises a circuit board, a lens assembly, an optical chip and an optical fiber assembly, wherein the lens assembly is arranged on the circuit board, the optical chip (a light emitting chip and a light receiving chip) is arranged between the lens assembly and the circuit board, and the lens assembly is connected with an external optical fiber through the optical fiber assembly to realize the transmission of optical signals. The optical fiber assembly comprises an optical fiber ferrule and an optical fiber adapter, one end of the optical fiber ferrule is inserted into the lens assembly, and the other end of the optical fiber ferrule is inserted into the optical fiber adapter through the internal optical fiber. After the optical fiber inserting core of the optical fiber assembly is inserted into the lens assembly, the bottom of the optical fiber inserting core needs to be glued and fixed with the circuit board, and therefore the circuit stability is guaranteed.

However, when the optical fiber ferrule is fixed with the circuit board through dispensing, the optical fiber ferrule and the circuit board are suspended, and the middle dispensing and filling are not easy to operate, so that the process is complex; after dispensing, baking and curing are needed, so that the working hours are increased; in addition, the finished product needs to be scraped after being repaired, the operation is complex, the damage to the ferrule, the circuit board and the optical lens can be caused, and the maintainability is poor.

SUMMERY OF THE UTILITY MODEL

The application provides an optical module, has realized the fixed of optic fibre lock pin among the optical fiber assembly, has guaranteed its firm being connected with the lens subassembly.

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:

a circuit board having a jack formed thereon;

the optical chip is arranged on the circuit board and used for generating optical signals or receiving optical signals;

the lens component covers the optical chip and is used for changing the propagation direction of the optical signal;

the optical fiber assembly comprises an optical fiber inserting core, an internal optical fiber and an optical fiber adapter which are sequentially connected, wherein the optical fiber inserting core is inserted into the lens assembly, and the optical fiber adapter is used for connecting an external optical fiber; the optical signal is used for receiving the optical signal passing through the lens component or receiving the optical signal transmitted by the external optical fiber;

the metal clip is arranged between the optical fiber adapter and the end face of the optical fiber ferrule, one side of the metal clip is abutted against the end face of the optical fiber ferrule, and the bottom end of the metal clip is inserted into the jack; the side surface of the optical fiber plug core, which is abutted against the end surface of the optical fiber plug core, is provided with an opening, and the internal optical fiber penetrates through the opening and is inserted into the optical fiber plug core.

The application provides an optical module, which comprises a circuit board, an optical chip, a lens assembly, an optical fiber assembly and a metal clip, wherein the circuit board is arranged on a lower shell, the optical chip and the lens assembly are both arranged on the circuit board, and the lens assembly is connected with the optical fiber assembly; the circuit board is used for providing signals, the optical chip is used for generating optical signals or receiving the optical signals, the lens assembly is used for changing the propagation direction of the optical signals, and the optical fiber assembly is used for transmitting the optical signals; the optical fiber assembly comprises an optical fiber inserting core, an internal optical fiber and an optical fiber adapter which are sequentially connected, the optical fiber inserting core is inserted into the lens assembly, the optical fiber adapter is clamped in the lower shell, and the optical fiber adapter is connected with the external optical fiber; the metal clip is arranged between the optical fiber adapter and the end face of the optical fiber ferrule, one side of the metal clip is abutted against the end face of the optical fiber ferrule and is used for abutting against the optical fiber ferrule; the circuit board is provided with a jack, and the bottom end of the metal clip is inserted into the jack so as to fix the metal clip; and the side surface which is abutted against the end surface of the optical fiber inserting core by the metal clip is provided with an opening, and the internal optical fiber passes through the opening and is inserted into the optical fiber inserting core. This application adds the metal clip between optic fibre adapter and optic fibre lock pin, and behind the one end of optic fibre lock pin inserted the lens subassembly, one side of metal clip supported the terminal surface of optic fibre lock pin, and in the bottom of metal clip inserted the jack to fix the optic fibre lock pin through the metal clip, avoid the optic fibre lock pin to remove about, make the optical coupling butt joint between lens subassembly and the optic fibre subassembly more stable. In addition, the installation and operation are simple and convenient, glue adding and baking are not needed, the working time is saved, the disassembly is convenient, the repair is easy, and the materials are not damaged.

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 according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of the optical module in fig. 4 with the upper housing, the lower housing and the unlocking component removed;

FIG. 6 is a partially exploded view of the optical module shown in FIG. 4 with the upper housing, the lower housing and the unlocking member removed;

fig. 7 is an exploded schematic view of a metal clip and optical fiber assembly in an optical module according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a metal clip in an optical module according to an embodiment of the present disclosure;

fig. 9 is another schematic angular structure diagram of a metal clip in an optical module according to an embodiment of the present disclosure;

fig. 10 is a schematic partial cross-sectional view of an optical module according to an embodiment of the present application;

fig. 11 is a partial cross-sectional view of another angle in an optical module according to an embodiment of the present disclosure;

fig. 12 is a schematic view illustrating an operating state of a metal clip in an optical module according to an embodiment of the present disclosure;

fig. 13 is a schematic diagram illustrating an operation effect of a metal clip in an optical module according to an embodiment of the present application.

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, an optical module 200 provided in the embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking member 203, a circuit board 300, a lens assembly 400, and an optical fiber assembly 600.

The upper shell 201 is covered on the lower shell 202 to form a wrapping 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 the optical fiber assembly 600 inside the optical module; the photoelectric devices such as the circuit board 300, the lens assembly 400, the optical fiber assembly 600 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 300, the lens assembly 400, the optical fiber assembly 600 and other devices can be conveniently installed in the shells, 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 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 component matched with the upper computer cage; the end of the unlocking member 203 is pulled to make the unlocking member 203 relatively move on the surface of the outer wall; the optical module is inserted into the cage of the upper computer, and the optical module is fixed in the cage of the upper computer by the clamping component of the unlocking component 203; by pulling the unlocking member 203, the engaging member of the unlocking member 203 moves along with the unlocking member, and further, the connection relationship between the engaging member and the upper computer is changed, so that the engagement relationship 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 300 is provided with circuit traces, electronic components (such as capacitors, resistors, triodes, and MOS transistors), and chips (such as an MCU, a laser driver chip, a limiting amplifier chip, a clock data recovery CDR, a power management chip, and a data processing chip DSP).

The circuit board 300 is used to provide signal circuits for signal electrical connection, which can provide signals. 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 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.

The lens assembly 400 is disposed on the circuit board 300, and functions to change the propagation direction of the optical signal. When an optical signal transmitted by the optical fiber assembly 600 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal enters the circuit board 300. When an optical signal transmitted from the circuit board 300 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal is transmitted to the optical fiber assembly 600.

The optical fiber assembly 600 is disposed on the lower housing 202, and one end thereof is connected to the lens assembly 400, and the other end thereof is connected to an external optical fiber for transmitting an optical signal. Specifically, the optical signal emitted from the lens assembly 400 is transmitted to the external optical fiber through the optical fiber assembly 600, and the optical signal emitted from the external optical fiber is transmitted into the lens assembly 400 through the optical fiber assembly 600.

Fig. 5 is a schematic structural view of the optical module in fig. 4 with the upper housing 201, the lower housing 202 and the unlocking member 203 removed, and fig. 6 is a partially exploded schematic view of the optical module in fig. 4 with the upper housing 201, the lower housing 202 and the unlocking member 203 removed. As shown in fig. 5 and 6, the optical fiber assembly 600 includes an optical fiber ferrule 601, an internal optical fiber 602, and an optical fiber adapter 603 connected in sequence, one end of the optical fiber ferrule 601 is inserted into the lens assembly 400, the other end of the optical fiber ferrule 601 is connected to one end of the internal optical fiber 602, and the other end of the internal optical fiber 602 is inserted into the optical fiber adapter 603 to connect the optical fiber assembly 600 and the lens assembly 400; the other end of the fiber optic adapter 603 connects to an external optical fiber. When an optical signal transmitted by the optical fiber assembly 600 needs to be transmitted into the lens assembly 400, an optical signal of an external optical fiber enters the lens assembly 400 through the optical fiber adapter 603, the internal optical fiber 602 and the optical fiber ferrule 601 in sequence; when an optical signal transmitted by the optical module needs to be transmitted to the external optical fiber, the optical signal enters the external optical fiber through the optical fiber ferrule 601, the internal optical fiber 602, and the optical fiber adapter 603 in sequence.

The optical module provided by the embodiment of the application further comprises an optical chip, and the optical chip is arranged on the circuit board 300. Specifically, a receiving cavity is provided between the lens assembly 400 and the circuit board 300, and the optical chip is disposed in the receiving cavity.

Due to the requirement of high-speed data transmission, the optical chip and the driving/matching chip thereof are arranged in a close distance so as to shorten the connection between the chips and reduce the signal loss caused by the connection, and therefore, the optical chip and the driving/matching chip thereof are generally fixed in the accommodating cavity at the same time. Specifically, since the optical chip may be a light emitting chip or a light receiving chip, when the optical chip is a light emitting chip, the accommodating cavity accommodates not only the light emitting chip but also a driving chip cooperating with the light emitting chip, and the driving chip cooperating with the light emitting chip and the light emitting chip are disposed in a close distance. When the optical chip is a light receiving chip, the accommodating cavity not only accommodates the light receiving chip, but also accommodates a transimpedance amplification chip matched with the light receiving chip, and the transimpedance amplification chip matched with the light receiving chip and the light receiving chip are arranged in a close range. The above is the case of one optical chip.

When the accommodating cavity comprises two optical chips, namely one optical chip is a light emitting chip and the other optical chip is a light receiving chip, the accommodating cavity can accommodate the light emitting chip and a driving chip matched with the light emitting chip, and the driving chip matched with the light emitting chip and the light emitting chip are arranged in a close range; the optical receiver chip and the transimpedance amplifier chip matched with the optical receiver chip can be contained, and the transimpedance amplifier chip matched with the optical receiver chip and the optical receiver chip are arranged in a short distance. The specific situation can be set according to the actual concrete, and the application is not limited.

The optical chip is used for generating an optical signal or receiving an optical signal, and specifically, since the optical chip may be a light emitting chip or a light receiving chip, the light emitting chip is used for generating an optical signal, and the light receiving chip is used for receiving an optical signal, the optical chip may generate an optical signal or receive an optical signal.

Lens assembly 400 is disposed on circuit board 300, overlying the optical chip. Specifically, the lens assembly 400 is disposed on the circuit board 300 and disposed above the optical chips in a covering manner, and the lens assembly 400 and the circuit board 300 form a cavity for covering the optical chips such as the light emitting chip and the light receiving chip. Light emitted from the light emitting chip is reflected by the lens assembly 400 and enters the optical fiber ferrule 601, and light from the optical fiber ferrule 601 is reflected by the lens assembly 400 and enters the light receiving chip. The lens assembly 400 not only serves to seal the optical chip, but also to establish optical connection between the optical chip and the fiber stub.

The lens assembly 400 establishes optical connection between the optical chip and the optical fiber ferrule 601, and is attached to the function of the lens assembly 400 to change the propagation direction of the optical signal. Specifically, when an optical signal transmitted by the optical fiber ferrule 601 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal enters the optical receiving chip of the optical chip; when an optical signal emitted by the light emitting chip of the optical chip enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal is transmitted to the optical fiber ferrule 601.

One end of the lens assembly 400 is provided with a plugging portion 401, and one end of the fiber ferrule 601 is inserted into the plugging portion 401. The insertion and extraction portion 401 generally includes an inner surface for inserting the fiber stub 601 and an outer surface that is aligned with the centerline of the inner surface. To facilitate insertion of the fiber stub 601 into the lens assembly 400, one end of the fiber stub 601 is shaped to match the shape of the inner surface. Since the cross-sectional shape of the end of the fiber stub 601 for insertion into the insertion and extraction portion is circular, the shape of the inner surface may be circular, oval, rectangular, or prismatic. However, the inner diameter of the inner surface is larger than the inner diameter of the optical fiber ferrule 601 inserted into the insertion portion 401, so that the optical fiber ferrule 601 can be inserted into the insertion portion 401 conveniently.

The fiber stub 601 has a receiving cavity inside, into which the inner fiber 602 is inserted. The material of the inner fiber 602 may be glass or plastic, and one end thereof is inserted into the fiber stub 601 and the other end thereof is inserted into the fiber adapter 603 for transmitting optical signals. Specifically, optical signals emitted by the lens assembly 400 are received by the fiber stub 601 and transmitted along the inner optical fiber 602 to the fiber adapter 603; alternatively, the optical signal from the fiber adapter 603 is transmitted to the fiber stub 601 along the inner fiber 602, and the fiber stub 601 transmits the optical signal into the lens assembly 400.

The fiber adapter 603 has one end connected to the other end of the internal fiber 602 and the other end connected to the external fiber. Specifically, the optical fiber adapter 603 generally includes an optical fiber ferrule and a sleeve wrapped around the optical fiber ferrule, the optical fiber ferrule of the optical fiber adapter 603 has a receiving cavity inside, the inner optical fiber 602 is inserted into the receiving cavity, the optical fiber ferrule is sleeved into the sleeve, and the end formed by the outer optical fiber is also inserted into the sleeve, thereby implementing the butt joint between the outer optical fiber and the inner optical fiber 602. The optical fiber adapter 603 has a snap-fit portion formed on the outside of the sleeve, and the snap-fit portion is snap-fitted to the lower housing 202.

After the optical fiber ferrule 601 is inserted into the plugging portion 401 of the lens assembly 400, if the optical fiber ferrule 601 shakes, the communication connection between the lens assembly 400 and the optical fiber assembly 600 may be affected, so that the optical fiber ferrule 601 needs to be fixed to ensure the stability of the optical fiber ferrule 601 inserted into the plugging portion 401.

Fig. 7 is an exploded schematic view of an optical fiber assembly 600 and a metal clip 500 in an optical module according to an embodiment of the present disclosure. As shown in fig. 7, for fixing the fiber ferrule 601, a metal clip 500 is disposed between the fiber ferrule 601 and the fiber adapter 603, the metal clip is vertically clamped on the circuit board 300, and one side of the metal clip 500 abuts against the end surface of the fiber ferrule 601, so as to abut against the fiber ferrule 601 and prevent the fiber ferrule 601 from shaking left and right.

Fig. 8 is a schematic structural diagram of a metal clip 500 in an optical module provided in the embodiment of the present application, and fig. 9 is a schematic view of another angle of the metal clip 500 in the optical module provided in the embodiment of the present application. As shown in fig. 8 and 9, the metal clip 500 includes a metal main plate 501, a plurality of metal legs are disposed on an edge of a bottom surface of the metal main plate 501, an opening is disposed between adjacent metal legs, and the internal fiber 602 is inserted into the fiber stub 601 through the opening. The circuit board 300 is provided with insertion holes corresponding to the metal legs, and the metal legs are inserted into the insertion holes of the circuit board 300, respectively, so as to fix the metal clip 500 on the circuit board 300. In this example, the openings provided between adjacent metal legs may be openings open at the lower end to facilitate the installation of the metal clip 500 and the fiber assembly 600.

Specifically, a first metal leg 503, a second metal leg 504 and a third metal leg 505 are disposed on the edge of the bottom surface of the metal main board 501, and the circuit board 300 is disposed on the corresponding first jack 301, second jack 302 and third jack 303; when the metal clip 500 is fixed, the first metal leg 503 is inserted into the first insertion hole 301, the second metal leg 504 is inserted into the second insertion hole 302, and the third metal leg 505 is inserted into the third insertion hole 303, so that the metal clip 500 is fixed on the circuit board 300.

The side edges of the first metal leg 503 and the third metal leg 505 are respectively provided with a limiting protrusion 506, the limiting protrusion 506 has a certain distance with the bottom end of the metal clip 500, so that when the first metal leg 503 is inserted into the first jack 301, the second metal leg 504 is inserted into the second jack 302, and the third metal leg 505 is inserted into the third jack 303, the limiting protrusion 506 abuts against the upper surface of the circuit board 300, so that the metal clip 500 cannot be continuously inserted into the jack on the circuit board 300, and the metal leg of the metal clip 500 is prevented from passing through the circuit board 300 and causing interference to other structures of the optical module.

The first metal leg 503, the second metal leg 504, the third metal leg 505 and the metal main plate 501 of the metal clip 500 are all provided with a protruding portion 502 therebetween, and the protruding portion 502 is a C-shaped structure. That is, the first metal leg 503 is connected to the metal main board 501 via a first protrusion, the second metal leg 504 is connected to the metal main board 501 via a second protrusion, the third metal leg 505 is connected to the metal main board 501 via a third protrusion, the first protrusion, the second protrusion and the third protrusion are all protruded toward the direction of the fiber stub 601, and the first protrusion, the second protrusion and the third protrusion are all abutted against the end surface of the fiber stub 601 to abut against the fiber stub 601.

Fig. 10 is a partial cross-sectional view of an optical module provided in an embodiment of the present application, and fig. 11 is a partial cross-sectional view of another angle of the optical module provided in the embodiment of the present application. As shown in fig. 10 and 11, after one end of the fiber stub 601 is inserted into the inserting/extracting portion 401 of the lens assembly 400, the metal clip 500 is moved downward from above the circuit board 300, so that the first metal leg 503 is inserted into the first insertion hole 301 on the circuit board 300, the second metal leg 504 is inserted into the second insertion hole 302 on the circuit board 300, and the third metal leg 505 is inserted into the third insertion hole 303 on the circuit board 300 until the limiting protrusions 506 on the side edges of the first metal leg 503 and the third metal leg 505 abut against the upper surface of the circuit board 300, at this time, the metal main board 501 is connected to the metal clip 500, and the protruding portion 502 of the metal leg abuts against the end surface of the fiber stub 601 for abutting against the fiber stub 601.

Fig. 12 is a schematic view of a working state of a metal clip 500 in the optical module according to the embodiment of the present application, and fig. 13 is a schematic view of a working effect of the metal clip 500 in the optical module according to the embodiment of the present application. As shown in fig. 12 and 13, in order to improve the docking stability of the optical fiber ferrule 601 and the plugging portion 401 of the lens assembly 400, the distance L between the insertion hole on the circuit board 300 and the end surface of the optical fiber ferrule 601 should be smaller than the protrusion height H of the protrusion 502 in the metal clip 500, so that after the first metal leg 503, the second metal leg 504, and the third metal leg 505 of the metal clip 500 are inserted into the corresponding first insertion hole 301, the second insertion hole 302, and the third insertion hole 303 on the circuit board 300, the end surface of the optical fiber ferrule 601 generates a pressing force on the protrusion 502 of the metal clip 500, and since the metal clip 500 is an elastic member, the optical fiber ferrule 601 and the plugging portion 401 of the lens assembly 400 can be fixed by the resilience of the protrusion 502 on the metal clip 500, so as to prevent the optical fiber ferrule 601 from moving.

In this example, the outer side of the optical fiber ferrule 601 may also be wrapped with a sleeve base 604, and the material of the sleeve base 604 may be different from ceramic, such as stainless steel or other alloy materials, which is not limited in this application. The sleeve base 604 has a larger trepan through which the optical fiber ferrule 601 passes, and the inner diameter of the trepan is larger than the outer diameter of the optical fiber ferrule 601 so as to perform a dispensing operation, and the dispensing operation is performed in the gap between the two, thereby realizing the adhesive bonding between the two.

The outer circumference of the sleeve base 604 may be formed in a hexagonal nut shape, but of course, other shapes may be formed, and the present application is not limited thereto.

When the sleeve base 604 is wrapped on the outer side of the optical fiber ferrule 601, the sleeve base 604 may include a first sleeve and a second sleeve, and the outer diameter of the first sleeve is smaller than that of the second sleeve, i.e. the outer surface of the sleeve base 604 is in a step shape. When propping the fiber ferrule 601 through the metal clip 500, the trompil on the metal clip 500 can be opened to the bottom surface edge of the metal mainboard 501, the trompil that sets up at the bottom surface edge of the metal mainboard 501 can be circular-arc, insert the first sleeve in this trompil, the protruding portion 502 of the metal clip 500 and the terminal surface looks butt of second sleeve, so can prevent the fiber ferrule 601 back-and-forth movement.

In order not to affect the arrangement of the circuit traces on the circuit board 300, the circuit traces may pass through the openings of the metal clips 500, so that the arrangement of the circuit traces does not need to be changed.

In this example, the top surface of the metal main board 501 is further provided with a metal elastic sheet 507, the metal elastic sheet 507 and the protrusion 502 are respectively located on different sides of the metal main board 501, and the metal elastic sheet 507 is inclined obliquely upward and is higher than the lower surface of the upper housing 201. When the upper housing 201 is covered in this way, the upper housing 201 generates a pressing force on the metal elastic sheet 507, so that the metal elastic sheet 507 tilts downward, that is, the upper housing 201 compresses the metal elastic sheet 507 in an interference manner, and the metal clip 500 is further fixed by the pressing of the upper housing 201.

In this example, the number of the insertion and extraction portions 401 of the lens assembly 400 may be two, and the number of the optical fiber assemblies 600 may also be two. The two optical fiber assemblies 600 can be single-core bidirectional ferrules, that is, each ferrule can transmit optical signals outwards and transmit optical signals inwards. In addition, the two optical fiber assemblies 600 may also be unidirectional ferrules, one transmitting optical signals outwards and the other transmitting optical signals inwards.

When the number of the optical fiber assemblies 600 is two, two openings which are opened downwards are arranged on the metal clip 500, the inner optical fiber 602 of each optical fiber assembly 600 respectively passes through the corresponding openings, and the openings are fixedly clamped and connected with the sleeve base 604 outside the corresponding optical fiber ferrule 601.

The application provides an optical module, this optical module includes casing down, with the last casing that the casing lid closed down, be used for providing the circuit board of signal, be used for producing light signal or receive optical signal's optical chip, be used for changing the lens subassembly of light signal propagation direction, be used for connecting lens subassembly and the optic fibre subassembly of outside optic fibre and be used for fixing optic fibre subassembly's metal clip, the circuit board sets up on casing down, optical chip all sets up on the circuit board with the lens subassembly, the lens subassembly is connected with the optic fibre subassembly. The optical fiber assembly comprises an optical fiber ferrule, an internal optical fiber and an optical fiber adapter which are sequentially connected, wherein one end of the optical fiber ferrule is inserted into the plugging part of the lens assembly, one end of the internal optical fiber is inserted into the other end of the optical fiber ferrule, and the other end of the internal optical fiber is inserted into one end of the optical fiber adapter; the optical fiber adapter is clamped on the lower shell, and the other end of the optical fiber adapter is connected with an external optical fiber. In order to ensure the splicing stability of the optical fiber ferrule and the lens component, the metal clip comprises a metal main board and a plurality of metal supporting legs, a protruding part is arranged between the metal main board and the metal supporting legs, corresponding insertion holes are arranged on the circuit board, and the metal supporting legs of the metal clip are inserted into the insertion holes on the circuit board so as to fix the metal clip; the protruding part of the metal clip is abutted against the end face of the optical fiber ferrule so as to abut against the optical fiber ferrule. So fix the optic fibre lock pin through metal clip, avoided the optic fibre lock pin to remove about for the optical coupling butt joint between lens subassembly and the optic fibre subassembly is more stable, and its installation easy and simple to handle, need not to add again to glue and toasts, saves man-hour, and it is convenient to dismantle, easily reprocesses, does not harm the material.

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 of the invention disclosed 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

1. A light module, comprising:

a circuit board having a jack formed thereon;

2. The optical module according to claim 1, wherein the metal clip comprises a metal main board, a plurality of metal legs are disposed on a bottom edge of the metal main board, the opening is disposed between adjacent metal legs, and the plurality of metal legs are respectively inserted into the insertion holes on the circuit board.

3. The optical module according to claim 2, wherein a first metal leg, a second metal leg and a third metal leg are disposed on a bottom edge of the metal motherboard, and a corresponding first jack, a second jack and a third jack are disposed on the circuit board, the first metal leg is inserted into the first jack, the second metal leg is inserted into the second jack, and the third metal leg is inserted into the third jack;

and the side edges of the first metal supporting leg and the second metal supporting leg are respectively provided with a limiting bulge, and the limiting bulges are abutted against the surface of the circuit board.

4. The optical module according to claim 3, wherein a protrusion is disposed between each of the first metal leg, the second metal leg, and the third metal leg and the metal main board, and the protrusion abuts against an end surface of the optical fiber ferrule.

5. The optical module of claim 4, wherein a distance between the first receptacle and the fiber stub end surface is less than a protrusion height of the protrusion.

6. The optical module of claim 5, wherein the metal clip is a spring.

7. The optical module according to claim 4, wherein the optical fiber ferrule is externally wrapped with a sleeve base, the sleeve base comprises a first sleeve and a second sleeve, and the outer diameter of the first sleeve is smaller than that of the second sleeve;

the first sleeve is inserted into the opening, and the protruding portion is abutted to the end face of the second sleeve.

8. The optical module according to claim 4, further comprising an upper housing, wherein a metal spring is disposed on a top surface of the metal main board, and the metal spring abuts against a lower surface of the upper housing.

9. The optical module according to claim 8, wherein the metal dome and the protrusion are respectively located on different sides of the metal main board.