CN110398806B

CN110398806B - Optical module

Info

Publication number: CN110398806B
Application number: CN201811572230.XA
Authority: CN
Inventors: 王晓晓; 何宗海; 王久成
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2018-06-29
Filing date: 2018-12-21
Publication date: 2022-03-11
Anticipated expiration: 2038-12-21
Also published as: CN110398806A

Abstract

The invention relates to an optical module which comprises a shell and an optical interface arranged in the shell, wherein the shell comprises an upper shell and a lower shell which are arranged along the vertical direction, at least two printed boards which are arranged in parallel at intervals along the vertical direction are arranged in the shell, and an electric pin for connecting the two printed boards in an electric signal mode is arranged between every two adjacent printed boards. Compared with the prior art, at least two printed boards are arranged in the shell along the vertical direction, and the printed boards arranged in the vertical direction can increase the area of a larger printed board under the condition of increasing smaller volume, so that the output of optical signals is improved; and an electric contact pin is arranged between two adjacent printed boards, so that the electric signal transmission of the two printed boards can be realized, and the mutual supporting effect can be realized.

Description

Optical module

Technical Field

The present invention relates to an optical module.

Background

The optical module is composed of a photoelectronic device, a functional circuit, an optical interface and the like, and the optical module has the function of realizing photoelectric conversion of converting an electric signal into an optical signal. For example, chinese patent No. CN205861941U and No. 2017.01.04 disclose an optical module structure, which includes an outer cover, i.e., a housing, a printed board is disposed in the outer cover, and an optical interface is disposed at one end of the optical module structure and is an LC interface. The printed board in the optical module structural member is one, if optical signal output needs to be improved, the area of the printed board needs to be increased, the area of the printed board is generally increased along the transverse direction or the length direction of the printed board in the prior art, so that the size of the optical module is larger, the increased area of the printed board is smaller, meanwhile, an LC interface needs to be connected with an LC connector firstly to be normally used, the optical module is troublesome to use, and the occupied space of the optical module is increased when the optical module is used.

Disclosure of Invention

The invention aims to provide an optical module, which aims to solve the problem that the volume of the optical module is obviously increased when the area of a printed board is increased in an optical module structural member in the prior art.

In order to achieve the above object, the optical module of the present invention comprises:

the optical module comprises a shell and an optical interface arranged in the shell, wherein the shell comprises an upper shell and a lower shell which are arranged along the up-down direction, at least two printed boards which are arranged in parallel at intervals are arranged in the shell, each printed board is arranged along the direction perpendicular to the printed boards, and an electric plug pin for connecting electric signals of the two printed boards is arranged between every two adjacent printed boards.

And a support piece is also arranged between two adjacent printed boards. The relative position between two adjacent printed boards is ensured to be fixed.

The optical module further comprises an electric connector used for enabling the optical module to be electrically connected with a user printed board, a mounting hole used for placing the electric connector is formed in the lower shell, the supporting pieces are guide columns, the number of the guide columns is at least two, and the electric connector is assembled in the mounting hole through the guide columns in a guiding mode. The electric connector is guided and positioned, and the electric connector is prevented from being installed and dislocated.

The outer wall surface of the lower shell is provided with a plurality of bosses, and the side surface of one side of each boss, which is far away from the lower shell, is positioned in the same plane. The smoothness of the optical module when the optical module is installed on a user printed board is guaranteed.

And a threaded hole which is matched with the fastener and used for fixing the optical module on the user printed board is formed in the boss. And the optical module is convenient to maintain and replace.

And the inner wall of the shell is also provided with a heat-conducting rubber pad for guiding out heat generated by components on the printed board. The product is ensured to have better heat dissipation capability.

The laser device is arranged in the shell, the number of the printed boards is two, one end, close to the laser device, of the lower printed board is longer than one end, close to the laser device, of the upper printed board, the flexible board is welded to the laser device, and the laser device is reversely welded to the lower printed board through the flexible board. The use of an external connector is reduced, and the occupied space of the optical module is effectively reduced.

The bottom of the laser is welded on one side of the flexible board, which is far away from the welding surface of the flexible board and the lower printed board. The stability of lower printed board is improved.

The lower shell is provided with a bayonet, and one end, far away from the laser, of the lower printed board is clamped in the bayonet. The stability of the printed board is further improved.

The invention has the beneficial effects that: compared with the prior art, at least two printed boards are arranged in the shell along the vertical direction, and the printed boards arranged in the vertical direction can increase the area of a larger printed board under the condition of increasing smaller volume, so that the output of optical signals is improved; and an electric contact pin is arranged between two adjacent printed boards, so that the electric signal transmission of the two printed boards can be realized, and the mutual supporting effect can be realized.

Drawings

Fig. 1 is a schematic structural diagram of an optical module according to the present invention;

FIG. 2 is a top view of an optical module according to the present invention;

FIG. 3 is a bottom view of an optical module of the present invention;

FIG. 4 is a schematic view of a portion of the structure of FIG. 3;

fig. 5 is an exploded view of an optical module according to the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 to 5, the optical module of the present invention includes an upper housing 1 and a lower housing 10 arranged in an up-down direction, where the upper housing 1 and the lower housing 10 form a housing, an upper printed board 3 and a lower printed board 9 arranged in parallel in the up-down direction are disposed in the housing, an electrical pin 6 for electrically connecting the two printed boards is disposed between the upper printed board 3 and the lower printed board 9, and one end of the lower printed board 9 close to the laser 4 is longer than one end of the upper printed board 3 close to the laser 4. Compared with the prior art, the two printed boards are arranged in the shell along the vertical direction, and the printed boards arranged in the vertical direction can increase the area of a larger printed board under the condition of increasing smaller volume, so that the output of optical signals is improved; set up electric contact pin simultaneously between two printing boards, electric contact pin is the copper bar, has certain support intensity, and electric contact pin not only can realize the signal of telecommunication transmission of two printing boards, can make two printing boards play the effect of mutual support moreover.

As shown in fig. 2, in this embodiment, a guide post 7 is disposed between the upper printed board 3 and the lower printed board 9, and the guide post 7 constitutes a support member, so that it can be ensured that the two printed boards are fixed in relative position, and further ensure the stability when the two printed boards are supported by each other. In other embodiments, the guide posts may not be provided, and only the electric pins may be used for supporting, or the support member may be a support block provided between the two printed boards. As shown in fig. 3 to 5, a mounting hole 15 is formed in the lower housing 10, a high-speed connector 8 is mounted in the mounting hole 15, the high-speed connector 8 is electrically connected to the lower printed board 9, the high-speed connector 8 forms an electrical connector, the high-speed connector is a micro-pitch high-speed connector, the distance between pins is only 0.8mm, 100 pins are arranged in an area of 12.5mm × 9mm, the highest speed of 20Gbps is supported, and the transmission of electrical signals between the user printed board and the optical module is realized. In other embodiments, the electrical connector is an existing connector. In this embodiment, the quantity of guide post 7 is two and asymmetric arrangement, is equipped with two dress holes of wearing that correspond with the guide post on the high-speed connector 8, and through guide post 7 direction location assembly in mounting hole 15 during the installation of high-speed connector 8, takes place the dislocation when avoiding the installation of high-speed connector, leads to the condition that the signal of telecommunication can not communicate. In this embodiment, the lower housing 10 is provided with the bayonet 20, and one end of the lower printed board 9 is clamped in the bayonet 20, so that the stability of the printed board is further improved.

In the present embodiment, as shown in fig. 2 and 3, the upper casing 1 and the lower casing 10 are detachably connected by two upper screws 16 on the upper casing 1 and one lower screw 19 on the lower casing 10, so as to facilitate later maintenance and repair; the housing formed by the upper housing 1 and the lower housing 10 not only plays a role in supporting and protecting the printed board and the laser, but also can realize a certain electromagnetic shielding function. As shown in fig. 3, a plurality of bosses 17 are provided on the outer wall surface of the lower housing 10, and the side surfaces of the bosses 17 on the side away from the lower housing 10 are located in the same plane, so as to ensure the flatness of the optical module when the optical module is mounted on the user printed board. In other embodiments, the boss may not be provided, and the boss may be directly contacted with the user printed board through the outer wall surface. In this embodiment, a threaded hole 18, which is used for fixing the optical module on the user printed board in cooperation with a fastener, is formed in the boss 17, so that the optical module can be maintained and replaced conveniently. In other embodiments, the threaded hole is disposed on an outer wall surface of the optical module; or directly welded on the user printed board through the guide posts.

As shown in fig. 1 and 5, in this embodiment, a heat conducting rubber pad 2 for guiding out heat generated by components on the printed board is further disposed on the inner wall of the casing, so as to ensure that the product has a good heat dissipation capability. In other embodiments, a heat-conducting rubber pad is not required to be arranged, and components on the printed board are directly contacted with the inner wall of the shell, so that the optical module is ensured to have a smaller volume, and meanwhile, certain heat dissipation capacity is also achieved. A laser 4 is arranged in the shell, a flexible plate 14 is welded on the laser 4, the laser 4 is reversely welded on the lower printed board 9 through the flexible plate 14, the conversion and transmission between electric signals and optical signals are realized, and the optical signals of 6.25Gbps are output outwards; the transmitting end of the laser 4 is provided with an optical pin 11, one end of the optical pin 11, which is far away from the laser 4, is connected with a tail fiber 5 through an optical signal, and the outer walls of the tail fiber 5 and the optical pin 11 are provided with an inner sealing fixing part for fixedly connecting the tail fiber 5 and the optical pin 11, so that the use of an external connector is reduced, and the occupied space of an optical module during use is effectively reduced. The interior fixed part in this embodiment is interior fixed section of thick bamboo 13 that seals, and the coating has the adhesive that is used for with tail optical fiber 5 and optical contact pin 11 fixed connection on the inner wall of interior fixed section of thick bamboo 13, guarantees that the tail optical fiber has certain pull resistance, guarantees simultaneously that the product can not appear the problem that the operative employee when plug the product, optic fibre breaks in the use. In this embodiment, the outer sealing fixing cylinder 12 for fixedly connecting the transmitting end of the laser 4 and the inner sealing fixing cylinder 13 is arranged on the outer walls of the transmitting end of the laser 4 and the inner sealing fixing cylinder 13, and the inner wall of the outer sealing fixing cylinder 12 is coated with the adhesive for fixedly connecting the transmitting end of the laser 4 and the inner sealing fixing cylinder, so that the stability among the laser transmitting end, the optical pin and the tail fiber is ensured, and the reliability of optical signal output of the optical module is improved.

Claims

1. Optical module, including casing and the optical interface of setting in the casing, the casing includes the last casing and the casing down of arranging along upper and lower direction, its characterized in that: the shell is internally provided with two printed boards which are arranged in parallel at intervals along the vertical direction, an electric pin for connecting the two printed boards in an electric signal manner is arranged between the two printed boards, the electric pin can realize the electric signal transmission of the two printed boards and can enable the two printed boards to play a mutual supporting role, and a supporting piece is also arranged between the two printed boards; the optical module further comprises an electric connector used for enabling the optical module to be electrically connected with a user printed board, a mounting hole used for placing the electric connector is formed in the lower shell, the supporting piece is a guide post, the number of the guide posts is at least two, and the electric connector is assembled in the mounting hole through the guide posts in a guiding mode; a laser is arranged in the shell, one end, close to the laser, of the lower printed board is longer than one end, close to the laser, of the upper printed board, and one end, close to the laser, of the lower printed board extends to the position below the laser; the last welding of laser instrument has the flexbile plate, and the one end of flexbile plate is connected on the side of the last printing board of orientation of laser instrument, and the other end of flexbile plate extends to between the last face of laser instrument bottom and lower printing board, and the laser instrument passes through the flexbile plate and welds under on the printing board, the welding of laser instrument bottom deviates from one side of flexbile plate and lower printing board face of weld, goes up casing and casing down through two on the last casing screw and a lower screw releasable connection on the casing down.

2. The optical module of claim 1, wherein: the outer wall surface of the lower shell is provided with a plurality of bosses, and the side surface of one side of each boss, which is far away from the lower shell, is positioned in the same plane.

3. The light module of claim 2, wherein: and a threaded hole which is matched with the fastener and used for fixing the optical module on the user printed board is formed in the boss.

4. The optical module of claim 1, wherein: and the inner wall of the shell is also provided with a heat-conducting rubber pad for guiding out heat generated by components on the printed board.

5. The optical module of claim 1, wherein: the lower shell is provided with a bayonet, and one end, far away from the laser, of the lower printed board is clamped in the bayonet.