CN213903870U

CN213903870U - Optical network unit

Info

Publication number: CN213903870U
Application number: CN202022599907.8U
Authority: CN
Inventors: 朱岩涛; 司宝峰; 徐发部; 姬景奇; 孙春雷
Original assignee: Guangdong Hisense Broadband Technology Co ltd
Current assignee: Guangdong Hisense Broadband Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-08-06
Anticipated expiration: 2030-11-11

Abstract

The application discloses an optical network unit, including: printed circuit board, light receiving and dispatching subassembly and fixed bolster. When the first light receiving device is installed, the first light receiving device enters from the opening of the first avoidance hole and is connected with the fixed support; meanwhile, a second light receiving device enters from the opening of the second avoidance hole and is connected with the fixed support; and the light emitting device in the light receiving and transmitting assembly is connected with the fixed support through the through hole, and the light receiving and transmitting assembly and the fixed support are positioned through the through hole, the first avoiding hole and the second avoiding hole. The first mounting arm and the second mounting arm are extruded and placed into a printed circuit board, and then the first mounting arm and the second mounting arm of the fixing support are clamped with the printed circuit board, so that the fixing of the fixing support and the printed circuit board is realized. After the connection, the connection between the fixed support and the printed circuit board is more stable due to the outward-extending characteristics of the first mounting arm and the second mounting arm.

Description

Optical network unit

Technical Field

The present application relates to the field of communications technologies, and in particular, to an optical network unit.

Background

An Optical Network Unit (ONU), the ONU is mainly used for selectively receiving a broadcast transmitted by an Optical Line Terminal (OLT), and collecting and buffering ethernet data that needs to be transmitted by a user. Generally, an Optical transceiver (BOSA) is installed in an Optical network unit, and the BOSA receives a service transmitted by an OLT through an Optical fiber and provides various broadband services to a user. BOSA directly affects the quality of the signal transmission on the quality of the user broadband.

In order to ensure the transmission quality of signals and realize the beam splitting or beam combining of optical fibers with different wavelengths, the three-way BOSA is arranged, and a light emitting device or a light receiving device is respectively arranged on three different end faces of the tube body. Typically, the BOSA light emitting device and the light receiving device are connected to a Printed Circuit Board (PCB) of the ONU through a flexible Circuit Board. Inside the optical network unit, the stability of the connection of the three-way BOSA and the printed circuit board directly influences optical communication.

SUMMERY OF THE UTILITY MODEL

The application provides an optical network unit to improve the stability of the optical network unit.

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 network unit, which comprises: a printed circuit board;

the optical transceiving component is fixedly connected with the printed circuit board; the optical transceiver module includes: a tube body, an optical fiber adapter, a light emitting device, a first light receiving device, a second light receiving device,

the optical fiber adapter is arranged on a first side of the tube body, and the light emitting device is arranged on the opposite side of the first side; the first light receiving device is arranged at the adjacent side of the first side, and the second light receiving device is arranged at the opposite side of the first light receiving device;

a fixed support, comprising: the tube body bearing platform is fixedly connected with the tube body and is used for bearing the optical transceiving component;

the tube body fixing arm is perpendicular to the tube body bearing table; the tube body fixing arm is provided with a through hole and is used for fixing the light emitting device;

the first mounting arm is arranged on one side of the tube body bearing table and clamped with the printed circuit board; the first mounting arm is provided with a first avoidance hole for bearing the first light receiving device;

the second mounting arm is arranged on the opposite side of the first mounting arm and clamped with the printed circuit board; the first mounting arm is provided with a second avoidance hole for bearing the second light receiving device;

the first mounting arm and the second mounting arm are of structures with outward expansion characteristics.

Optionally, the first mounting arm further includes: a first mounting groove and a second mounting groove; the first avoidance hole is arranged between the first mounting groove and the second mounting groove;

the opening direction of the first mounting groove is opposite to that of the second mounting groove;

the printed circuit board is provided with a support mounting groove, and one side of the support mounting groove is provided with a first clamping part and a second clamping part;

the first clamping part is clamped with the first mounting groove; the second clamping part is clamped with the second mounting groove;

the second mounting arm further comprises: a third mounting groove and a fourth mounting groove; the second avoidance hole is arranged between the third mounting groove and the fourth mounting groove;

the opening direction of the third mounting groove is opposite to that of the fourth mounting groove;

a third clamping part and a fourth clamping part are respectively arranged on the opposite sides of the first clamping part;

the third clamping part is clamped with the third mounting groove; the fourth clamping portion is clamped with the fourth mounting groove.

Optionally, the first mounting groove, the second mounting groove, the third mounting groove and the fourth mounting groove are all parallel to the printed circuit board.

Optionally, the first mounting groove and the third mounting groove are symmetrically arranged; the second mounting groove and the fourth mounting groove are symmetrically arranged.

Optionally, the bracket mounting groove is symmetrically provided with a third avoidance hole and a fourth avoidance hole, and the third avoidance hole is arranged between the first clamping portion and the second clamping portion and used for avoiding and mounting the first light receiving device;

the fourth avoidance hole is formed between the third clamping portion and the fourth clamping portion and used for avoiding and installing the second light receiving device.

Optionally, the printed circuit board further includes: the first connecting part is arranged on the printed circuit board, is positioned between the first clamping part and the third clamping part and is used for being fixedly connected with the light emitting device;

the second connecting part is arranged between the third avoiding hole and the first clamping part and is used for connecting the first light receiving device;

and the third connecting part is arranged between the fourth avoiding hole and the third clamping part and is used for connecting the second light receiving device.

Optionally, the opening directions of the first avoidance hole and the second avoidance hole are opposite to the printed circuit board.

Optionally, the pipe body plummer is equipped with at least one connecting hole, the pipe body with the pipe body plummer passes through connecting hole fixed connection.

Optionally, the fixing bracket is of an integrated structure.

Compared with the prior art, the beneficial effect of this application is:

the application discloses an optical network unit, including: printed circuit board, light receiving and dispatching subassembly and fixed bolster. Wherein, light receiving and dispatching subassembly is three-dimensional BOSA structure, includes: the light emitting diode comprises a tube body, a light emitting device, a first light receiving device and a second light receiving device. The light emitting device is arranged on one side of the tube body; the first light receiving device is arranged at the adjacent side of the light emitting device, and the second light receiving device is arranged at the opposite side of the first light receiving device. The fixed bracket is provided with a tube body bearing platform which is fixedly connected with the tube body and used for bearing the light receiving and transmitting assembly; the first mounting arm is arranged on one side of the tube body bearing table and is clamped with the printed circuit board; the first mounting arm is provided with a first avoidance hole for bearing a first light receiving device; the second mounting arm is arranged on the opposite side of the first mounting arm and is clamped with the printed circuit board; the first mounting arm is provided with a second avoiding hole for bearing the second light receiving device. When the first light receiving device is installed, the first light receiving device enters from the opening of the first avoidance hole and is connected with the fixed support; meanwhile, a second light receiving device enters from the opening of the second avoidance hole and is connected with the fixed support; and the light emitting device in the light receiving and transmitting assembly is connected with the fixed support through the through hole, and the light receiving and transmitting assembly and the fixed support are positioned through the through hole, the first avoiding hole and the second avoiding hole. The first mounting arm and the second mounting arm are extruded and placed into a printed circuit board, and then the first mounting arm and the second mounting arm of the fixing support are clamped with the printed circuit board, so that the fixing of the fixing support and the printed circuit board is realized. After the connection, the connection between the fixed support and the printed circuit board is more stable due to the outward-extending characteristics of the first mounting arm and the second mounting arm.

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 diagram of a conventional ONU;

fig. 2 is a schematic structural diagram of a housing provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a partial combination of an optical network unit according to an embodiment of the present application;

fig. 4 is a schematic partial cross-sectional view of an optical network unit according to an embodiment of the present application;

fig. 5 is a schematic partial split view of an optical network unit according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present disclosure;

fig. 7 is a first schematic structural diagram of a fixing bracket according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a fixing bracket according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a fixing bracket and an optical transceiver module according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram of a local installation process of an optical network unit according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a printed circuit board according to an embodiment of the present disclosure.

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 elements of fiber optic communications is the conversion of optical to electrical signals. The optical fiber communication uses the optical signal carrying information to transmit in the optical fiber/optical waveguide, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of the light in the optical fiber. The information processing devices such as computers use electrical signals, which require the interconversion between electrical signals and optical signals during the signal transmission process.

The optical transceiver module realizes the above photoelectric conversion function in the technical field of optical fiber communication, and the interconversion of optical signals and electrical signals is the core function of the optical transceiver module. The optical transceiver module is electrically connected with an external upper computer through a gold finger on the circuit board, the main electrical connection comprises power supply, I2C signals, data signal transmission, grounding and the like, the electrical connection mode realized by the gold finger becomes a standard mode of the optical transceiver module industry, and on the basis, the circuit board is a necessary technical characteristic in most optical transceiver modules.

Fig. 1 shows a schematic diagram of a conventional optical network unit. As shown in fig. 1, the optical network unit 100 includes: housing 110, printed circuit board 300, optical transceiver module 400, and flexible circuit board 200. The printed circuit board 300, the optical transceiver module 400 and the flexible circuit board 200 are disposed in the housing 110. The optical transceiver module 400 and the flexible circuit board 200 are disposed on an upper surface of the printed circuit board 300. The structural relationship among the housing 110, the printed circuit board 300, the optical transceiver module 400, and the flexible circuit board 200 will be described in detail.

Among them, the housing 110 shown in the present application may include: an upper case 111 and a lower case 112. The upper casing 111 and the lower casing 112 are generally made of metal materials, which is beneficial to electromagnetic shielding and heat dissipation. The upper shell 111 and the lower shell 112 are combined to facilitate installation of devices such as the printed circuit board 300 and the like into the shell 110, and the shell 110 of the optical network unit is generally not made into an integral structure, so that when the devices such as the printed circuit board and the like are assembled, the positioning component, the heat dissipation structure and the electromagnetic shielding structure cannot be installed, and production automation is not facilitated. Further, please refer to fig. 2, wherein the surface of the upper housing 111 is provided with a plurality of fins 111a, and the sidewall of the lower housing 112 is provided with a plurality of ventilation openings 112 a. During the operation, the heat generated by each device in the housing 110 can be diffused through the fins 111a of the upper housing and the ventilation openings 112a of the lower housing. A plurality of work lights are generally disposed on the optical network unit 100, and the upper housing is provided with a plurality of light windows 111b at positions corresponding to the work lights (not shown in fig. 2). The upper housing 111 and the lower housing 112 form a receiving cavity. The receiving cavity is used for packaging the printed circuit board 300, the optical transceiver module 400 and other devices.

Fig. 3 is a schematic diagram of a partial combination of an optical network unit according to an embodiment of the present application, and fig. 4 is a schematic diagram of a partial cross section of an optical network unit according to an embodiment of the present application; fig. 5 is a schematic diagram illustrating a partial split of an optical network unit according to an embodiment of the present application, and fig. 6 is a schematic diagram illustrating a structure of an optical transceiver module according to an embodiment of the present application. Referring to fig. 3, 4, 5 and 6, in the embodiment of the present application, the optical transceiver module 400 is a three-way BOSA structure, including: a tube body 401, a fiber optic adapter 402, a light emitting device 403, a first light receiving device 404, a second light receiving device 405. Where the fiber optic adapter 402 is disposed on a first side of the tube 401 and the light emitting device 403 is disposed on an opposite side of the first side of the tube. The first light receiving device 404 is disposed adjacent to the first side, and the second light receiving device 405 is disposed opposite to the first light receiving device 404.

The fiber optic adapter 402 connects external optical fibers for receiving or transmitting optical signals of the optical transceiver module 400. The light emitting device 403, the first light receiving device 404, and the second light receiving device 405 are all of a TO body structure, and are electrically connected TO the printed circuit board through pins. In order to facilitate the electrical connection between the pins and the printed circuit board and improve the stability of the connection between the optical transceiver module 400 and the printed circuit board 300, the pins and the corresponding pads of the printed circuit board need to be located as close as possible, the distance between the pins and the corresponding pads of the printed circuit board is reduced, and the positioning accuracy and the connection firmness of the pins and the corresponding pads of the printed circuit board are improved.

Fig. 7 is a first structural schematic diagram of a fixing bracket provided in the embodiment of the present application, fig. 8 is a second structural schematic diagram of a fixing bracket provided in the embodiment of the present application, and fig. 9 is a structural schematic diagram of a fixing bracket and an optical transceiver module provided in the embodiment of the present application. As shown in fig. 7, 8 and 9, the fixing bracket 500 includes: a tube carrier stage 501, a tube securing arm 502, a first mounting arm 503, and a second mounting arm 504. The tube carrier 501 is disposed parallel to the printed circuit board 300 for carrying the transceiver module 400. Further, the tube carrier 501 is provided with a plurality of connection holes 5011, and the tube 401 is fixedly connected to the tube carrier 501 through the connection holes 5011. In the embodiment of the present application, the number of the connection holes 5011 is 4, and for the connection stability and the stress uniformity of the tube 401, the 4 connection holes 5011 are uniformly disposed on the tube stage 501. The tube 401 and the tube supporting platform 501 can be fixedly connected by welding or by glue.

The tube fixing arm 502 is provided perpendicular to the tube receiving platform 501. The tube fixing arm 502 is provided with a through hole 5021 for fixing the light emitting device 403. In order to accommodate the structural matching of the optical transceiver module 400 and the fixing bracket 500, the distance from the bottom end of the through hole 5021 to the tube carrier 501 is the same as the distance from the bottom end of the light emitting device 403 to the bottom surface of the tube 401. The light emitting device 403 is fixed to the tube fixing arm 502 through the through hole 5021.

A first mounting arm 503 disposed at one side of the tube carrier 501 and engaged with the pcb 300; the first mounting arm 503 is provided with a first avoiding hole 5031 for carrying the first light receiving device 404. A second mounting arm 504, which is arranged at the opposite side of the first mounting arm 503 and is clamped with the printed circuit board 300; the second mounting arm 504 is provided with a second avoiding hole 5041 for carrying the second light receiving device 405. The first mounting arm 503 and the second mounting arm 504 have an outwardly extending characteristic structure.

The opening directions of the first avoiding hole 5031 and the second avoiding hole 5041 are opposite to the printed circuit board 300. The first light receiving device 404 enters from the opening of the first avoidance hole 5031 and is connected to the fixing bracket 500; meanwhile, the second light receiving device 405 enters from the opening of the second avoiding hole 5041.

When the device is installed, the first light receiving device 404 enters from the opening of the first avoidance hole 5031 and is connected to the fixing bracket 500; meanwhile, the second light receiving device 405 enters through the opening of the second avoiding hole 5041 and is connected to the fixing bracket 500; the light emitting device 403 in the light receiving and transmitting assembly 400 is connected to the fixing bracket 500 through the through hole 5021, and the light receiving and transmitting assembly 400 is positioned with the fixing bracket 500 through the through hole 5021, the first avoiding hole 5031 and the second avoiding hole 5041. The first mounting arm 503 and the second mounting arm 504 are pressed and placed into the printed circuit board 300, and then the first mounting arm 503 and the second mounting arm 504 of the fixing bracket 500 are clamped with the printed circuit board 300, so that the fixing of the fixing bracket 500 and the printed circuit board 300 in the direction perpendicular to the plane of the printed circuit board 300 is realized. After the connection, due to the outward-extending characteristics of the first mounting arm 503 and the second mounting arm 504, the fixing of the fixing bracket 500 and the printed circuit board 300 in the direction parallel to the plane of the printed circuit board 300 is realized, so that the connection between the fixing bracket and the circuit board is more stable.

Further, the fixing bracket 500 is an integrated structure, and can be a mechanism formed by bending a sheet of plate for multiple times after being shaped by punching. The first mounting arm 503 and the second mounting arm 504 are of a spring-like structure and have an outward-extending characteristic.

The optical transceiver module 400 is embedded in the printed circuit board 300 through the fixing bracket 500, thereby effectively reducing the space occupancy rate.

Fig. 10 is a schematic diagram of a local installation process of an optical network unit according to an embodiment of the present application. During installation, the first installation arm 503 and the second installation arm 504 are firstly folded, the fixed support 500 provided with the optical transceiver module 400 is completely placed in the support installation groove 301, in order to avoid damage caused by the pins of the first optical receiver 404 and the second optical receiver 405 contacting the printed circuit board 300 in the installation process, the printed circuit board 300 is provided with the support installation groove 301, and the support installation groove 301 is symmetrically provided with a third avoidance hole 3011 and a fourth avoidance hole 3012 which are respectively used for avoiding installation of the first optical receiver 404 and avoiding installation of the second optical receiver 405.

Fig. 11 is a schematic diagram of a printed circuit board structure according to an embodiment of the present invention, and as shown in fig. 3 and fig. 11, in order to maintain the optical transceiver module 400 parallel to the printed circuit board 300, the first mounting arm 503 further includes: a first mounting groove 5032, a second mounting groove 5033; the first avoidance hole 5031 is disposed between the first mounting groove 5032 and the second mounting groove 5033. The opening direction of the first mounting groove 5032 is opposite to the opening direction of the second mounting groove 5033.

Accordingly, the printed circuit board 300 is provided with a bracket mounting groove 301. One side of the bracket mounting groove 301 is provided with a first clamping portion 3013 and a second clamping portion 3014. The first clamping portion 3013 is clamped with the first mounting groove 5032; the second clamping portion 3014 is clamped to the second mounting groove 5033.

The second mounting arm 504 further includes: a third mounting groove 5042, a fourth mounting groove 5043; the second avoiding hole 5041 is disposed between the third mounting groove 5042 and the fourth mounting groove 5043. The opening direction of the third mounting groove 5042 is opposite to the opening direction of the fourth mounting groove 5043. Third and

fourth clamping portions

3015 and 3016 are respectively disposed on opposite sides of the first clamping portion 3013 in the bracket mounting groove 301. The third clamping part 3015 is clamped with the third mounting groove 5042; the fourth clamping portion 3016 is clamped to the fourth mounting groove 5043.

The first mounting arm 503 and the second mounting arm 504 of the fixing bracket 500 are clamped with the printed circuit board 300, so that the fixing of the fixing bracket 500 and the printed circuit board 300 is realized. After the connection, due to the outward-extending characteristics of the first mounting arm 503 and the second mounting arm 504, the fixing of the fixing bracket 500 and the printed circuit board 300 in the direction parallel to the printed circuit board 300 is realized, so that the connection between the fixing bracket 500 and the printed circuit board 300 is more stable.

Further, a third avoiding hole 3011 is disposed between the first clamping portion 3013 and the second clamping portion 3014, and is used for avoiding installation of the first light receiving device 404. The fourth avoidance hole 3012 is disposed between the third clamping portion 3015 and the fourth clamping portion 3016, and is used for avoiding and mounting the second light receiving device 405.

The first and second mounting

grooves

5032 and 5033 are open in the direction away from the first avoidance hole 5031, and the third and fourth mounting

grooves

5042 and 5043 are open in the direction away from the second avoidance hole 5041. In the installation process, the first installation arm 503 and the second installation arm 504 are folded, and after the fixing bracket 500 with the optical transceiver module 400 installed therein is completely placed in the bracket installation groove 301, the fixing bracket 500 is integrally moved toward the opening of the first installation groove 5032, so that the first installation groove 5032 is clamped with the first clamping portion 3013, and the third installation groove 5042 is clamped with the third clamping portion 3015.

The bracket mounting groove 301 is further provided with a fifth clamping portion 3017 and a sixth clamping portion 3018 for folding the first mounting arm 503 and the second mounting arm 504 in the mounting process, and when the fixing bracket 500 on which the optical transceiver module 400 is mounted is completely placed in the bracket mounting groove 301, the second mounting groove 5033 and the fourth mounting groove 5043 are retracted and clamped.

In order to fix the pins of the optical transceiver module 400 and the pads at the corresponding positions of the printed circuit board 300 by the clamping of the first mounting groove 5032 and the first clamping portion 3013, and the third mounting groove 5042 and the third clamping portion 3015, in the embodiment of the present application, the first mounting arm 503 and the second mounting arm 504 are symmetrically arranged, and have a constant height and width, the opening depths of the first mounting groove 5032 and the third mounting groove 5042 are the same, and the opening depths of the second mounting groove 5033 and the fourth mounting groove 5043 are the same.

The application discloses an optical network unit, including: printed circuit board, light receiving and dispatching subassembly and fixed bolster. Wherein, light receiving and dispatching subassembly is three-dimensional BOSA structure, includes: the optical fiber adapter comprises a tube body, an optical fiber adapter, a light emitting device, a first light receiving device and a second light receiving device. The optical fiber adapter is arranged on the first side of the tube body, and the light emitting device is arranged on the opposite side of the first side; the first light receiving device is arranged on the adjacent side of the first side, and the second light receiving device is arranged on the opposite side of the first light receiving device. The fixed bracket is provided with a tube body bearing platform which is fixedly connected with the tube body and used for bearing the light receiving and transmitting assembly; the first mounting arm is arranged on one side of the tube body bearing table and is clamped with the printed circuit board; the first mounting arm is provided with a first avoidance hole for bearing a first light receiving device; the second mounting arm is arranged on the opposite side of the first mounting arm and is clamped with the printed circuit board; the first mounting arm is provided with a second avoiding hole for bearing the second light receiving device. When the first light receiving device is installed, the first light receiving device enters from the opening of the first avoidance hole and is connected with the fixed support; meanwhile, a second light receiving device enters from the opening of the second avoidance hole and is connected with the fixed support; and the light emitting device in the light receiving and transmitting assembly is connected with the fixed support through the through hole, and the light receiving and transmitting assembly and the fixed support are positioned through the through hole, the first avoiding hole and the second avoiding hole. The first mounting arm and the second mounting arm are extruded and placed into a printed circuit board, and then the first mounting arm and the second mounting arm of the fixing support are clamped with the printed circuit board, so that the fixing of the fixing support and the printed circuit board is realized. After the connection, the connection between the fixed support and the printed circuit board is more stable due to the outward-extending characteristics of the first mounting arm and the second mounting arm.

In order to electrically connect the printed circuit board 300 and the optical transceiver module 400, the printed circuit board 300 further includes: the first connecting portion 302 is disposed between the first engaging portion and the third engaging portion, and is configured to be fixedly connected to the light emitting device. And the second connecting part 303 is arranged between the third avoiding hole and the first clamping part and used for connecting the first light receiving device. And a third connecting portion 304 disposed between the fourth avoiding hole and the third clamping portion, for connecting the second light receiving device.

Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.

It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 present disclosure. 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. An optical network unit, comprising: a printed circuit board;

the optical transceiving component is fixedly connected with the printed circuit board; the optical transceiver module includes: a tube body, a light emitting device, a first light receiving device, a second light receiving device,

the light emitting device is arranged on one side of the tube body; the first light receiving device is arranged at the adjacent side of the light emitting device, and the second light receiving device is arranged at the opposite side of the first light receiving device;

2. The onu of claim 1, wherein the first mounting arm further comprises: a first mounting groove and a second mounting groove; the first avoidance hole is arranged between the first mounting groove and the second mounting groove;

3. The optical network unit of claim 2, wherein the first mounting slot, the second mounting slot, the third mounting slot, and the fourth mounting slot are all disposed parallel to the printed circuit board.

4. The ONU of claim 2, wherein the first mounting groove and the third mounting groove are symmetrically arranged; the second mounting groove and the fourth mounting groove are symmetrically arranged.

5. The optical network unit according to claim 2, wherein the bracket mounting groove is symmetrically provided with a third avoidance hole and a fourth avoidance hole, and the third avoidance hole is disposed between the first clamping portion and the second clamping portion and used for avoiding and mounting the first optical receiving device;

6. The optical network unit of claim 5, wherein the printed circuit board further comprises: the first connecting part is arranged on the printed circuit board, is positioned between the first clamping part and the third clamping part and is used for being fixedly connected with the light emitting device;

7. The onu of claim 1, wherein the first avoiding hole and the second avoiding hole are open in directions away from the pcb.

8. The ONU of claim 1, wherein the tube holder is provided with at least one connection hole, and the tube holder are fixedly connected through the connection hole.

9. The onu of claim 1, wherein the fixing bracket is a unitary structure.