Optical module

Patent metadata

Field	Value
Publication number	US-12066670-B2
Application number	US-202117547770-A
Country	US
Kind code	B2
Filing date	Dec 10, 2021
Priority date	Aug 18, 2020
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

An optical module includes a shell, a circuit board, at least one of a light-transmitting chip or a light-receiving chip, a lens assembly, an optical fiber ferrule assembly and a fixing plate. The circuit board is disposed in the shell. The light-transmitting chip and/or the light-receiving chip is disposed on the circuit board. The lens assembly is disposed on the circuit board, covers the light-transmitting chip and/or the light-receiving chip, and is configured to change a propagation direction of an optical signal incident into the lens assembly. The optical fiber ferrule assembly is connected to the lens assembly, and is configured to transmit an optical signal incident into the optical fiber ferrule assembly. The fixing plate is configured to fix the optical fiber ferrule assembly to the lens assembly.

First claim

What is claimed is:

1. An optical module, comprising:
a shell;
a circuit board disposed in the shell;
at least one of a light-transmitting chip or a light-receiving chip that is disposed on the circuit board, the light-transmitting chip being configured to generate an optical signal, and the light-receiving chip being configured to receive an optical signal from an outside of the optical module;
a lens assembly disposed on the circuit board, covering the at least one of the light-transmitting chip or the light-receiving chip, and configured to change a propagation direction of an optical signal incident to the lens assembly;
an optical fiber ferrule assembly connected to the lens assembly, and configured to transmit an optical signal transmitted into the optical fiber ferrule assembly; and
a fixing plate configured to fix the optical fiber ferrule assembly to the lens assembly; wherein
the fixing plate includes:
a main body portion abutting against an end face of the optical fiber ferrule assembly away from the lens assembly;
a first side plate connected to an end of the main body portion;
a second side plate connected to the first side plate, and abutting against the shell;
a third side plate connected to another end of the main body portion;
a fourth side plate connected to the third side plate, and abutting against the shell; and
a through hole disposed on the main body portion, and the optical fiber ferrule assembly passing through the through hole; wherein

the first side plate and the main body portion have a first included angle therebetween, and the second side plate and the first side plate have a second included angle therebetween;
the third side plate and the main body portion have a third included angle therebetween, and the fourth side plate and the third side plate have a fourth included angle therebetween; and
the first included angle, the second included angle, the third included angle, and the fourth included angle are all obtuse angles.

2. The optical module according to claim 1 , wherein the shell includes a lower shell;
the lower shell includes a bottom plate and a first lower side plate and a second lower side plate which are connected to the bottom plate and disposed opposite to each other;
the first lower side plate is provided with a first stop boss, and the first stop boss is perpendicular to the first lower side plate and protrudes toward the second lower side plate;
the second lower side plate is provided with a second stop boss, and the second stop boss is perpendicular to the second lower side plate and protrudes toward the first lower side plate; and
the second side plate abuts against the first stop boss, and the fourth side plate abuts against the second stop boss.

3. The optical module according to claim 2 , wherein each of the first stop boss and the second stop boss includes a U-shaped structure;
an end of the U-shaped structure is connected to a corresponding lower side plate, and an arc-shaped bottom of the U-shaped structure protrudes toward another corresponding lower side plate, and another end of the U-shaped structure is a free end; and
the free end is closer to the fixing plate than the end of the U-shaped structure which is connected to the corresponding lower side plate.

4. The optical module according to claim 2 , wherein a distance between a surface of the first stop boss where the first stop boss is in contact with the second side plate and a surface of the optical fiber ferrule assembly where the optical fiber ferrule assembly is in contact with the main body portion is smaller than a distance between a surface of the second side plate where the second side plate is in contact with the first stop boss and a surface of the main body portion where the main body portion is in contact with the optical fiber ferrule assembly; and
a distance between a surface of the second stop boss where the second stop boss is in contact with the fourth side plate and the surface of the optical fiber ferrule assembly where the optical fiber ferrule assembly is in contact with the main body portion is smaller than a distance between a surface of the fourth side plate where the fourth side plate is in contact with the second stop boss and the surface of the main body portion where the main body portion is in contact with the optical fiber ferrule assembly.

5. The optical module according to claim 2 , wherein the first lower side plate is further provided with a first support boss, and a distance between a surface of the first support boss away from the bottom plate and a surface of the bottom plate proximate to the circuit board is smaller than a distance between a surface of the first stop boss away from the bottom plate and the surface of the bottom plate proximate to the circuit board; and
the second lower side plate is further provided with a second support boss, a distance between a surface of the second support boss away from the bottom plate and the surface of the bottom plate proximate to the circuit board is smaller than a distance between a surface of the second stop boss away from the bottom plate and the surface of the bottom plate proximate to the circuit board; and
the second side plate is disposed on the first support boss, and the fourth side plate is disposed on the second support boss, so that the fixing plate and the circuit board have a gap therebetween.

6. The optical module according to claim 1 , wherein the first side plate and the third side plate are located at a same side of the main body portion, and the first included angle is substantially equal to the third included angle, so that the first side plate and the third side plate are symmetrically arranged with respect to the main body portion.

7. The optical module according to claim 6 , wherein the second side plate and the fourth side plate are located at the same side of the main body portion, and the second side plate is substantially equal to the fourth side plate, so that the second side plate and the fourth side plate are symmetrically arranged with respect to the main body portion.

8. The optical module according to claim 1 , wherein
the first included angle is substantially equal to the second included angle, so that the second side plate is substantially parallel to the main body portion; and
the third included angle is substantially equal to the fourth included angle, so that the fourth side plate is substantially parallel to the main body portion.

9. The optical module according to claim 2 , wherein the shell further includes an upper shell, and the upper shell covers the lower shell; and
the fixing plate further includes a bent tongue disposed on the main body portion, and the bent tongue is configured to clamp with the upper shell.

10. The optical module according to claim 1 , wherein there is a gap between a surface of the main body portion proximate to the circuit board and the circuit board, and surfaces of the first side plate and the third side plate proximate to the circuit board are in contact with the circuit board.

11. The optical module according to claim 1 , wherein
the lens assembly includes:
a lens base configured to change the propagation direction of the optical signal incident into the lens base; and
a plugging portion disposed at an end of the lens base;

the optical fiber ferrule assembly includes:
a first optical fiber ferrule being inserted into the plugging portion;
a sleeve base sleeved on an outer circumference of the first optical fiber ferrule;
an optical fiber adapter;
a second optical fiber ferrule being inserted into the optical fiber adapter; and
an internal optical fiber, an end of the internal optical fib

Assignees

• Hisense Broadband Multimedia Technology Co Ltd

Inventors

• Cui Wei
• Liu Xuxia
• Si Baofeng
• Ma Xiaolei
• Yang Sigeng

Classifications

• G02B6/428

  containing printed circuit boards [PCB] · CPC title

• G02B6/4206

  Optical features (G02B6/4207, G02B6/421 take precedence) · CPC title

• G02B6/4292

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title

• G02B6/4261

  Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails · CPC title

• G02B6/4246

  Bidirectionally operating package structures · CPC title