CN220455567U

CN220455567U - Optical module

Info

Publication number: CN220455567U
Application number: CN202322135354.4U
Authority: CN
Inventors: 王新华; 张健; 仲兆良
Original assignee: Qingdao Xinghang Photoelectric Technology Co ltd
Current assignee: Qingdao Xinghang Photoelectric Technology Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-02-06
Anticipated expiration: 2033-08-09

Abstract

The utility model discloses an optical module, which comprises a shell, a circuit board and an electric connector, wherein the shell comprises: a first housing, a second housing, and a third housing; the first shell comprises a first shell part, a second shell part, a third shell part and a fourth shell part which are connected with the first shell part, and the second shell part, the third shell part and the fourth shell part are connected in sequence; the second shell is connected with the first shell; the third shell is connected with the first shell; a gap is formed between the second shell and the third shell; the circuit board is connected with the first shell, the second shell and the third shell, the optical fiber assembly and the electric connector are arranged on the circuit board, and an optical fiber assembly through hole exposing part of the optical fiber assembly is formed in the second shell; a part of the circuit board is exposed to the notch; the electric connector is arranged on the circuit board and is positioned at the notch. The utility model has compact structure and high integration level, can realize smaller packaging size, can realize board edge installation at the position of the electric connector, saves space and reduces the arrangement of the tail fiber type modules of users.

Description

Optical module

Technical Field

The utility model relates to the technical field of optical communication equipment, in particular to an optical transceiver module.

Background

With popularization and deep application of optical communication, requirements and days of photoelectric conversion modules are increasing. Market demands are also moving toward ever smaller, higher speed, and higher density.

The existing optical modules are various in variety, poor in universality and poor in module heat dissipation problem, and the application range and service life of products are affected.

In addition, the common optical module is generally installed in a customer motherboard and is connected with board edge connectors such as LRM, VPX, J J and the like through optical fiber ribbons, so that modules with different joint types and different lengths are required to be designed according to user requirements, and the standardization and generalization degree is low. If the optical module is directly arranged on the board edge, the optical fiber ribbon can be saved, and the space in the user board can be saved. But currently there are fewer small high density high rate light module products that can be mounted to the board edge.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The utility model provides an optical module, which solves the technical problem that the existing optical module cannot be directly arranged on a board side.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

an optical module comprising a housing, a circuit board, and an electrical connector, the housing comprising:

the first shell comprises a first shell part, a second shell part, a third shell part and a fourth shell part, wherein the second shell part, the third shell part and the fourth shell part are connected with the first shell part in sequence, and the second shell part, the third shell part and the fourth shell part are all arranged at a certain angle with the first shell part;

a second housing connected to the first, second and fourth housing portions;

a third housing connected to the third housing portion, the second housing portion, and the fourth housing portion;

a gap is formed between the second shell and the third shell;

the circuit board is connected with the first shell, the second shell and the third shell, the circuit board comprises an inner side face and an outer side face which are opposite to each other, an optical fiber assembly, an optical chip, an electric chip and a lens are arranged on the inner side face of the circuit board, and a first optical fiber assembly through hole exposing part of the optical fiber assembly is formed in the second shell; part of the outer side surface of the circuit board is exposed to the notch, and part of the outer side surface of the circuit board is connected with the inner side surface of the third shell;

and the electric connector is arranged on the outer side surface of the circuit board and is positioned at the notch.

As described above, the first housing is fixedly connected with the electrical connector by a fastener.

As described above, the optical module is provided with a groove, and the third housing is provided with a bump adapted to the groove.

In the optical module, the second housing is provided with the positioning part or the second housing is provided with the positioning piece.

The optical module comprises a mounting plate and a positioning plate, wherein the mounting plate is mounted on the second shell, a second optical fiber assembly through hole is formed in the mounting plate, and the second optical fiber assembly through hole is used for exposing part of the optical fiber assembly to the mounting plate; the locating plate is arranged at a certain angle with the mounting plate.

The optical module comprises a guide pin and a guide pin head, wherein a part of the guide pin head is positioned in the first optical fiber assembly through hole and the second optical fiber assembly through hole, and the guide pin is exposed out of the mounting plate.

As described above, the inner side of the second housing forms a step, and the circuit board is located on the step.

In the optical module described above, the thickness of the portion where the first housing portion meets the second housing is greater than the thickness of the portion where the first housing portion meets the third housing portion.

The optical module is characterized in that the optical fiber assembly is mounted on the circuit board through the support and the backing plate, and the optical fiber assembly comprises a guide needle, and the guide needle is positioned between the support and the backing plate.

As described above, the third housing is made of a high thermal conductivity material, and the optical chip and the electrical chip are located at positions on the circuit board corresponding to the third housing.

Compared with the prior art, the utility model has the advantages and positive effects that: an optical module includes a housing, a circuit board, and an electrical connector, the housing comprising: a first housing, a second housing, and a third housing; the first shell comprises a first shell part, a second shell part, a third shell part and a fourth shell part which are connected with the first shell part, wherein the second shell part, the third shell part and the fourth shell part are connected in sequence, and the second shell part, the third shell part and the fourth shell part are all arranged at a certain angle with the first shell part; a second housing connected to the first housing portion, the second housing portion, and the fourth housing portion; the third shell is connected with the third shell part, the second shell part and the fourth shell part; a gap is formed between the second shell and the third shell; the circuit board is connected with the first shell, the second shell and the third shell, the circuit board comprises an inner side face and an outer side face which are opposite to each other, the inner side face of the circuit board is provided with an optical fiber assembly, an optical chip, an electric chip and a lens, and the second shell is provided with a first optical fiber assembly through hole exposing part of the optical fiber assembly; the outer side surface of part of the circuit board is exposed to the notch, and the outer side surface of the part of the circuit board is connected with the inner side surface of the third shell; the electric connector is arranged on the outer side surface of the circuit board and is positioned at the notch. The utility model has compact structure and high integration level, can realize smaller packaging size, can realize board edge installation at the position of the electric connector, saves space and reduces the arrangement of the tail fiber type modules of users.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic illustration of a fiber optic assembly according to an embodiment;

FIG. 2 is a schematic diagram of an optical module according to an embodiment;

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 2;

FIG. 5 is an exploded view of FIG. 2;

FIG. 6 is an exploded view of the circuit board and its internal side electronics;

fig. 7 is an exploded view of the positioning member and the optical module.

FIG. 8 is a schematic view of an optical module without an electrical connector and a positioning member mounted thereon;

fig. 9 is a bottom view of fig. 8.

In the drawing the view of the figure,

11. a first housing; 111. a first housing portion; 112. a second housing portion; 113. a third housing portion; 114. a fourth housing portion;

12. a second housing; 121. a step; 122. a first fiber optic assembly through-hole; 123. a positioning piece; 1231. a mounting plate; 12311. a second fiber assembly through hole; 1232. a positioning plate;

13. a third housing; 131. a bump;

2. a circuit board; 21. an optical fiber assembly; 211. a guide pin; 212. a guide needle; 22. an optical chip; 23. an electrical chip; 24. a lens;

3. an electrical connector; 31. a groove;

4. and (5) a notch.

51. 52, 53, 54, screws;

61. a bracket; 62. a backing plate.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

An optical module encapsulates a photoelectric conversion portion inside the module through a first housing, a second housing, and a third housing. The optical module is externally opened with an optical interface and an electrical interface, and the optical interface is positioned on the second shell and is usually the side surface of the optical module; the electrical interface is located between the second housing and the third housing, typically the bottom surface of the optical module. The optical module can be arranged on the board edge by reasonably designing the positions and the packaging of the components, so that the space in the board is saved. The optical module is a packaging structure of a parallel optical transceiver module mounted on a board edge, is suitable for VPX series connectors, and can realize high-density high-speed communication of 48 channels at maximum with smaller packaging size.

Through the design of reasonable design chip position and third casing, effectually reduced the thermal resistance between chip and the shell, solved the module heat dissipation problem from the structure. The positioning problem of the butt joint is solved by using the positioning plate and the guide pin. The parallel light receiving and transmitting module has compact whole structure, good heat dissipation, high chip packaging density and small size, and is beneficial to the application of a high-density integrated communication system.

The following describes the optical module in detail with reference to fig. 1 to 9:

the optical module comprises a shell, a circuit board 2 and an electric connector 3, wherein the shell comprises a first shell 11, a second shell 12 and a third shell 13, the three shells are connected to form the shell of the optical module, and an optical fiber assembly 21, an optical chip 22, an electric chip 23, a lens 24 and the electric connector 3 are arranged on the circuit board 2. The second housing 12 has a through hole exposing the optical fiber assembly 21, and a notch 4 exposing the electrical connector 3 is provided between the second housing 12 and the third housing 13.

The first housing 11 includes a first housing portion 111, and a second housing portion 112, a third housing portion 113, and a fourth housing portion 114 that are in contact with the first housing portion 111, the second housing portion 112, the third housing portion 113, and the fourth housing portion 114 being in contact in this order, the second housing portion 112, the third housing portion 113, and the fourth housing portion 114 each being disposed at an angle to the first housing portion 111.

The first housing portion 111 is a top wall of the optical module, and the second housing portion 112, the third housing portion 113, and the fourth housing portion 114 are three side walls of the optical module that are sequentially connected.

The thickness of the portion where the first housing portion 111 meets the second housing 12 is greater than the thickness of the portion where the first housing portion 111 meets the third housing portion 113. The outer surface of the first housing portion 111 is stepped.

The second housing 12 is in contact with the first housing portion 111, the second housing portion 112, and the fourth housing portion 114.

The second housing 12 is fixed to the first housing 11 by screws 54.

The second housing 12 forms a fourth side wall of the light module.

A step 121 is formed at the inner side of the second housing 12, the step 121 being for supporting the circuit board 2, one end of the circuit board 2 being located on the step 121.

One end of the circuit board 2 may overlap the step 121, or one end of the circuit board 2 may be connected to the step 121 through glue, or the circuit board 2 may be suspended on the step 121 with a slight gap between the circuit board 2 and the step 121.

The third housing 13 is in contact with the third housing portion 113, the second housing portion 112, and the fourth housing portion 114.

The third housing 13 forms the bottom wall of the light module.

The second housing 12 and the third housing 13 are not connected, a notch 4 is formed between the second housing 12 and the third housing 13, and the electrical connector 3 is exposed through the notch 4.

The circuit board 2 is connected to the first housing 11, the second housing 12, and the third housing 13.

Specifically, the circuit board 2 is connected to the bottom ends of the second housing portion 112 and the fourth housing portion 114 of the first housing 11, one end of the circuit board 2 is overlapped on the step 121 of the second housing 12, and the other end of the circuit board 2 is located on the third housing 13.

The circuit board 2 includes opposite inner and outer sides, the inner side being a side located within the housing, the inner side being opposite to the first housing portion 111. The inner side is mounted with an optical fiber assembly 21, an optical chip 22, an electrical chip 23 and a lens 24.

Part of the outer side surface of the circuit board 2 is exposed to the notch 4, and part of the outer side surface of the circuit board 2 is connected with the inner side surface of the third shell 13.

The electrical connector 3 is mounted on the outer side of the circuit board 2 and is located at the notch 4.

The electrical connector 3 has a mounting hole or screw hole, and the first housing 11 is fixedly connected with the electrical connector 3 by a fastener.

Typically, the fastener is a screw 51, although the fastener may be a bolt.

Mounting holes are provided in the first housing part 111 and the circuit board of the first housing 11, and screws 51 pass through the first housing part 111 and the circuit board to fasten the first housing 11 with the electrical connector 3.

The third housing 13 is fastened to the first housing 11 by a screw 52.

A groove 31 is provided on the electrical connector 3, and a protrusion 131 adapted to the groove 31 is provided on the third housing 13. The protrusion 131 is assembled with the groove 31 to improve the stability of the assembly.

The second housing 12 is provided with a first fiber assembly through hole 122 exposing a portion of the fiber assembly 21.

The optical fiber assembly 21 includes a guide pin 211 and a guide pin head 212, a portion of the guide pin head 212 is located in the first optical fiber assembly through hole 122, and the guide pin 211 is exposed out of the second housing 12.

A positioning portion is formed on the second housing 12.

Accurate positioning is achieved through the positioning part and the guide pin 211, and the plug is convenient to dock with a client plug.

The fiber optic assembly 21 employs at least two identical 24-core MT fiber array assemblies for up to 48-way integration.

In some embodiments, the second housing 12 mounts a positioning member 123. The positioning member 123 includes a mounting plate 1231 and a positioning plate 1232, and the positioning plate 1232 is disposed at an angle to the mounting plate 1231. The mounting plate 1231 is mounted on the second housing 12 by the screws 53.

The mounting plate 1231 has a second fiber optic assembly through hole 12311 thereon, the second fiber optic assembly through hole 12311 being used to expose a portion of the fiber optic assembly to the mounting plate 1231. A portion of the pins 212 of the fiber optic assembly 21 are positioned within the first fiber optic assembly throughbore 122 with the pins 211 exposed from the mounting plate 1231.

Accurate positioning is achieved through the positioning plate 1232 and the guide pins 211, and docking with a client plug is facilitated. The optical fiber assembly 21 is mounted on the circuit board 2 by the bracket 61 and the pad 62, wherein the guide pin head 212 of the optical fiber assembly 21 is located between the bracket 61 and the pad 62.

The optical chip 22 and the electrical chip 23 are mounted on the circuit board 2, and after the optical fiber assembly 21 is assembled with the lens 24 and the pad 62, the assembly is mounted on the circuit board 2 and fixed by the bracket 61.

The third housing 13 is made of high heat conduction material, and the optical chip 22 and the electrical chip 23 are located at positions corresponding to the third housing 13 on the circuit board 2. Thus, the heat generated by the optical chip 22 and the electrical chip 23 can be rapidly dissipated, and the heat dissipation effect of the optical module is ensured.

The heating chip is attached to the circuit board 2, the circuit board 2 is directly arranged below the Fang Jintie third shell 13, and the third shell 13 is made of high-heat-conductivity metal, so that the heat dissipation problem is solved.

When the optical module is assembled, the optical chip 22 and the electrical chip 23 are mounted on the circuit board 2, and after the optical fiber module 21, the lens 24 and the pad 62 are assembled together, the module is mounted on the circuit board 2 and fixed by the bracket 61. The assembled circuit board 2 is placed on the first housing 11, the second housing 12 is fixed to the first housing 11 by screws, the third housing 13 is fixed to the first housing 11 by screws 52, the screws 51 pass through the circuit board 2, the electrical connector 3 is fastened to the first housing 11, and the positioning plate 1232 is fixed to the second housing 12 by screws 53, thereby completing the assembly.

The optical module is suitable for board edge installation, saves space in a user board, and reduces the arrangement of the user tail fiber type modules; the support and the backing plate are used for reinforcing the optical fiber assembly, so that the structural reliability of the optical fiber assembly is improved; the design of the guide pin and the positioning plate can realize accurate positioning with the plug end; and the small-size package is high-density and high-speed integrated, so that more channels can be distributed in a smaller board distribution space for a user of an application module.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. An optical module comprising a housing, a circuit board, and an electrical connector, the housing comprising:

a second housing connected to the first, second and fourth housing portions;

a gap is formed between the second shell and the third shell;

2. The optical module of claim 1, wherein the first housing is fixedly connected to the electrical connector by a fastener.

3. The optical module of claim 1, wherein the electrical connector is provided with a groove, and the third housing is provided with a protrusion adapted to the groove.

4. The light module as recited in claim 1, wherein a positioning portion is formed on the second housing or a positioning member is mounted on the second housing.

5. The light module of claim 4 wherein the positioning member comprises a mounting plate and a positioning plate, the mounting plate being mounted on the second housing, the mounting plate having a second fiber optic assembly through hole therein for exposing a portion of the fiber optic assembly to the mounting plate; the locating plate is arranged at a certain angle with the mounting plate.

6. The optical module of claim 5, wherein the optical fiber assembly includes a guide pin and a guide pin, a portion of the guide pin being positioned within the first and second optical fiber assembly through holes, the guide pin being exposed from the mounting plate.

7. The optical module of claim 1, wherein an inner side of the second housing forms a step on which the circuit board is located.

8. The optical module of claim 1, wherein a thickness of a portion of the first housing portion that meets the second housing is greater than a thickness of a portion of the first housing portion that meets the third housing portion.

9. The optical module of claim 1 wherein the fiber optic assembly is mounted to the circuit board by a bracket and a pad, the fiber optic assembly including a guide pin positioned between the bracket and the pad.

10. The optical module of claim 1, wherein the third housing is of a highly thermally conductive material, and the optical chip and the electrical chip are located on the circuit board at positions corresponding to the third housing.