CN111641082A

CN111641082A - Terminal connection structure of SFF 2 XN series optical module

Info

Publication number: CN111641082A
Application number: CN202010567675.XA
Authority: CN
Inventors: 张智凯; 黄俊铭; 张世宏; 代智红
Original assignee: Zhongjiang UD Electronics Co ltd; Dongguan Yongde Electronic Technology Co ltd; UD Electronic Corp
Current assignee: Zhongjiang UD Electronics Co ltd; Dongguan Yongde Electronic Technology Co ltd; UD Electronic Corp
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-09-08
Anticipated expiration: 2040-06-19
Also published as: CN111641082B

Abstract

The invention discloses a terminal connecting structure of an SFF 2 XN series optical module, which comprises a plurality of terminal modules and at least one conductive column; the plurality of terminal modules are overlapped together, and the insulating blocks of part of the terminal modules are fixedly provided with a grounding terminal in an embedding and molding way, the fixing part of the grounding terminal is provided with a through hole, and the edge of the through hole is integrally connected with a spring sheet in a molding way; the conductive pole is provided with a contact plane, the conductive pole is separated from the signal terminal and penetrates through the through hole, and the elastic sheet elastically abuts against the contact plane to be connected in a conduction mode. The edge integrated into one piece through seting up through-hole and through-hole on ground terminal is connected with the shell fragment to the cooperation is led and is had contact plane on the electrical pillar, makes ground terminal and lead and carry out the turn-on connection on contact plane through shell fragment elastic extrusion between the electrical pillar, consequently need not to reduce the processing cost with size tolerance control's fairly accurate, has promoted the stability of contact, can also effectively improve the crosstalk problem.

Description

Terminal connection structure of SFF 2 XN series optical module

Technical Field

The invention relates to the technical field of connectors, in particular to a terminal connection structure of an SFF 2 XN series optical module.

Background

With the rapid development of the 100G network, the application of the 100G optical module is more widely used, and the common assembling types of the 100G optical module are as follows: CFP/CFP2/CFP4, CXP, and QSFP28, the most common being QSFP28 optical modules. The QSFP28 optical module is mainly applied to 40G and 100G Ethernet and used for optical interconnection in data communication, the QSFP28 optical module is mainly used in the fields of calculation, high frequency and the like, and a mode of a grounding terminal is often adopted in order to improve crosstalk in the optical module.

The connection mode of the ground terminal in the terminal connection structure of the existing SFF 2 × N optical module is as disclosed in chinese patent with publication number CN102318143B, and a circular pin is adopted to be connected and conducted with a circular hole in the ground terminal, and in this connection mode, the tolerance range of the hole needs to be controlled to be small enough to ensure that the connection between the ground terminal and the pin is stable enough, the requirement on the process is high, the processing cost is high, and point contact is easily formed between the hole and the pin, which results in less contact and unstable connection structure, thereby crosstalk cannot be completely solved, so it is necessary to further improve the terminal connection structure of the existing SFF 2 × N optical module.

Disclosure of Invention

In view of the above, the present invention is directed to the defects in the prior art, and the main objective of the present invention is to provide a terminal connection structure of an SFF 2 × N optical module, which can effectively solve the problems of the conventional terminal connection structure of an SFF 2 × N optical module, such as high process requirement, high production cost, unstable contact, and incapability of completely eliminating crosstalk.

In order to achieve the purpose, the invention adopts the following technical scheme:

a terminal connection structure of SFF 2 XN series optical module comprises a plurality of terminal modules and at least one conductive column; the terminal modules are stacked together, each terminal module comprises an insulating block and a signal terminal which is fixedly embedded with the insulating block, a grounding terminal is fixedly embedded on the insulating block of part of the terminal modules, a through hole is formed in the fixing part of the grounding terminal, and the edge of the through hole is integrally connected with a spring piece; the conductive pole is provided with a contact plane, the conductive pole is separated from the signal terminal and penetrates through the through hole, and the elastic sheet elastically abuts against the contact plane to be connected in a conduction mode.

As a preferred scheme, two through holes are formed in the fixing portion of the ground terminal, the two through holes are arranged in a staggered manner from top to bottom and from left to right, the edge of each through hole is integrally connected with the elastic sheet, correspondingly, the two conductive columns are arranged from top to bottom and from left to right and are inserted into the corresponding through holes, and the contact plane on each conductive column is respectively in elastic contact with the corresponding elastic sheet to be conducted.

As a preferred scheme, the conductive column is a square column with four contact planes, the through hole is a square hole and is tightly matched with the conductive column, two opposite edges of the through hole are integrally connected with the elastic pieces, and the two elastic pieces are opposite to each other and respectively abut against the corresponding contact planes.

Preferably, a through groove is formed through the left and right side surfaces of the insulating block, and the through hole is exposed in the through groove.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, the technical scheme includes that:

edge integrated into one piece through seting up through-hole and through-hole on ground terminal is connected with the shell fragment, and the cooperation is led and is had contact plane on the electrical pillar, make ground terminal and lead to carry out the turn-on connection on contact plane through shell fragment elastic extrusion between the electrical pillar, this kind of connected mode is through using elastic shell fragment, consequently, need not to be with size tolerance control fairly accurate, can reduce the processing cost, simultaneously through shell fragment and contact plane's contact, avoid ground terminal and lead the electrical pillar between the point contact to appear, not only promote the stability of contact, can also effectively improve the crosstalk problem.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic perspective view of a preferred embodiment of the present invention;

FIG. 2 is a partial assembly view of the preferred embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the preferred embodiment of the present invention;

FIG. 4 is a schematic diagram of a terminal structure according to a preferred embodiment of the present invention;

fig. 5 is a graph of electrical characteristic far end crosstalk versus current in the presence or absence of a ground terminal connection.

The attached drawings indicate the following:

10. terminal module 101, through-hole

102. Through groove 11 and insulating block

12. Signal terminal 13, ground terminal

131. Fixing part 132, spring plate

20. Conductive posts 21, contact planes.

Detailed Description

Referring to fig. 1 to 4, a specific structure of a preferred embodiment of the invention is shown, wherein the specific structure includes a plurality of terminal modules 10 and at least one conductive pillar 20.

The plurality of terminal modules 10 are stacked together, each terminal module 10 comprises an insulating block 11 and a signal terminal 12 which is fixedly embedded with the insulating block 10, a ground terminal 13 is fixedly embedded on the insulating block 11 of a part of the terminal modules 10, a through hole 101 is formed in a fixing part 131 of the ground terminal 13, and an elastic sheet 132 is integrally connected with the edge of the through hole 101; in this embodiment, two through holes 101 are formed in the fixing portion 131 of the ground terminal 13, the two through holes 101 are staggered from top to bottom and from left to right, the edge of each through hole 101 is integrally connected with the elastic piece 132, the through hole 101 is a square hole, two opposite edges of the through hole 101 are integrally connected with the elastic piece 132, a through groove 102 is formed in the left side surface and the right side surface of the insulating block 11 in a penetrating manner, and the through hole 101 is exposed in the through groove 102.

The conductive post 20 has a contact plane 21, the conductive post 20 is separated from the signal terminal 12 and passes through the through hole 101, the elastic pieces 132 elastically press against the contact plane 21 to be connected, so that the contact between the ground terminal 13 and the conductive post 20 is more, and the connection is more stable.

Detailed description the manufacturing process of this embodiment is as follows:

during manufacturing, the signal terminal 12 and the ground terminal 13 are manufactured first, the elastic sheet 132 which is integrally connected with the edges of the through holes 101 and the through holes 101 is formed on the ground terminal 13 in a stamping mode, then the signal terminal 12 and the ground terminal 13 are placed in a die and are injection molded to form a plurality of terminal modules 10, then the conductive column 20 is formed in a stamping mode, the terminal modules 10 are overlapped together, finally the conductive column 20 sequentially penetrates through the through holes 101 to be fixedly connected in a conduction mode, and the elastic sheet 132 is elastically extruded on the contact plane 21 of the conductive column 20.

The test comparison is carried out on the far-end crosstalk of the medium-high frequency item with or without the connection of the grounding terminal, the comparison graph of the characteristic curve is shown in fig. 5, and as can be seen from fig. 5, under the condition of no connection of the grounding terminal, the curve transition of each performance is very unsmooth, the fluctuation is very large, and the crosstalk problem is very serious, and under the condition of connection of the grounding terminal, the curve transition of each performance is smooth, the fluctuation is smooth, and the crosstalk problem is greatly improved.

The design of the invention is characterized in that: edge integrated into one piece through seting up through-hole and through-hole on ground terminal is connected with the shell fragment, and the cooperation is led and is had contact plane on the electrical pillar, make ground terminal and lead to carry out the turn-on connection on contact plane through shell fragment elastic extrusion between the electrical pillar, this kind of connected mode is through using elastic shell fragment, consequently, need not to be with size tolerance control fairly accurate, can reduce the processing cost, simultaneously through shell fragment and contact plane's contact, avoid ground terminal and lead the electrical pillar between the point contact to appear, not only promote the stability of contact, can also effectively improve the crosstalk problem.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A terminal connection structure of an SFF 2 XN-series optical module, characterized in that: the connector comprises a plurality of terminal modules and at least one conductive column; the terminal modules are stacked together, each terminal module comprises an insulating block and a signal terminal which is fixedly embedded with the insulating block, a grounding terminal is fixedly embedded on the insulating block of part of the terminal modules, a through hole is formed in the fixing part of the grounding terminal, and the edge of the through hole is integrally connected with a spring piece; the conductive pole is provided with a contact plane, the conductive pole is separated from the signal terminal and penetrates through the through hole, and the elastic sheet elastically abuts against the contact plane to be connected in a conduction mode.

2. The terminal connection structure of an SFF 2 × N series optical module according to claim 1, wherein: two through holes are formed in the fixing portion of the grounding terminal, the two through holes are arranged in a staggered mode from top to bottom and from left to right, the edge of each through hole is connected with the elastic sheet in an integrated mode, correspondingly, the two conductive columns are arranged in a corresponding mode, the two conductive columns are arranged from top to bottom and from left to right and inserted into the corresponding through holes, and the contact plane on each conductive column is respectively in elastic contact with the corresponding elastic sheet to be conducted.

3. The terminal connection structure of an SFF 2 × N series optical module according to claim 1, wherein: the conducting post is a square column body which is provided with four contact planes, the through hole is a square hole and is tightly matched with the conducting post, the two opposite edges of the through hole are integrally connected with the elastic sheets, and the two elastic sheets are opposite to each other and respectively abut against the corresponding contact planes.

4. The terminal connection structure of an SFF 2 × N series optical module according to claim 1, wherein: the left side surface and the right side surface of the insulating block penetrate through the groove, and the through hole is exposed in the through groove.