Electrical connection structure

Abstract

The invention discloses an electric connection structure which comprises an electric connector and a circuit board. The electric connector comprises a plurality of pairs of signal terminals and a plurality of grounding terminals, one grounding terminal is arranged between two pairs of adjacent signal terminals, each signal terminal is provided with a bending part and a signal terminal plugging part, and each grounding terminal is provided with a shielding part and a grounding terminal plugging part. The circuit board is provided with a plurality of pairs of signal terminal plugging holes and a plurality of grounding terminal plugging holes, the grounding terminal plugging holes are arranged along the base line, each pair of signal terminal plugging holes are respectively arranged at two sides of the base line, the bending parts of the plurality of signal terminals extend towards two sides of the base line in a staggered manner, and the signal terminal plugging parts are respectively and correspondingly inserted into the signal terminal plugging holes; the grounding terminal plugging portion of each grounding terminal is correspondingly plugged in the grounding terminal plugging hole, the width of the shielding portion in the direction orthogonal to the base line is larger than or equal to the length of the bending portion of each signal terminal extending towards the two sides of the base line, and the shielding portion can shield the bending portion of each signal terminal.

Description

[0001] This application is a divisional application. The application date of the original application is August 3, 2020, the application number is 202010766830.0, and the application name is Electrical connection structure. Technical Field

[0002] The present application relates to the technical field of signal shielding, and in particular to an electrical connection structure for connecting an electrical connector with a signal shielding function to a circuit board. Background Art

[0003] In the terminal stacking structure of existing external input / output electrical connectors, such as SFP, QSFP, OSFP or OSFP-DD, the signal terminal pairs and the grounding terminals are inserted into the plug holes of the circuit board in a staggered configuration, that is, a grounding terminal is set between two adjacent signal terminal pairs, so that the grounding terminal can play the role of electromagnetic shielding. However, in order to avoid the plug holes of other components on the circuit board, the signal terminal plug holes on the existing circuit board are mostly arranged in a left-right staggered configuration, so that when the signal terminal is inserted into the circuit board, it will extend to the left and right sides relative to the grounding terminal to the plug hole. However, this structure of the signal terminal extending to the left and right to the plug hole is prone to crosstalk between the signal terminals when transmitting high-frequency signals.

[0004] For existing solutions, see Figure 1 , Figure 2 and Figure 3 , which is a stereogram of an existing electrical connection structure, Figure 1 A side view of the electrical connection structure and along Figure 2 AA line cross-sectional view. As shown in the figure, the existing solution is to weld two symmetrical metal shields S to two ground terminals G respectively. The two metal shields S together with the ground terminals G will surround the signal terminal pair I1 and I2, hoping to play an electromagnetic shielding role and solve the crosstalk problem. However, in this solution, the metal shield S will occupy a considerable space on the circuit board, and according to the simulation results, the integrated crosstalk noise (ICN) of the above existing solution is in the range of 4.2 to 4.8, which exceeds the 3.6 of the OIF (Optical Internetworking Forum) specification, so the existing solution does not meet the specification. Summary of the invention

[0005] The embodiments of the present application provide an electrical connection structure to solve the problem of crosstalk noise generated when the signal terminals of the existing electrical connection structure extend to both sides of the terminal arrangement base line.

[0006] In order to solve the above technical problems, this application is implemented as follows: An electrical connection device is provided, which includes an electrical connector and a circuit board. The electrical connector includes a plurality of pairs of signal terminals and a plurality of grounding terminals, wherein a grounding terminal is arranged between two pairs of adjacent signal terminals, each signal terminal includes a bending portion, a signal terminal plug-in portion, and a signal terminal body, wherein the bending portion is adjacent to between the signal terminal body and the signal terminal plug-in portion, and each grounding terminal includes a shielding portion, a grounding terminal plug-in portion, and a grounding terminal body, wherein the shielding portion is adjacent to between the grounding terminal body and the grounding terminal plug-in portion, and the shielding portion corresponds to the bending portion. The circuit board has multiple pairs of signal terminal plug-in holes and multiple ground terminal plug-in holes, the ground terminal plug-in holes are arranged along the baseline, the signal terminal bodies of multiple signal terminals and the ground terminal bodies of multiple ground terminals are arranged along the baseline, the width of the ground terminal body in the extension direction of the baseline is greater than the width of the signal terminal body in the extension direction of the baseline, the shielding portion of each ground terminal is closer to the circuit board than the grounding terminal body, a ground terminal plug-in hole is provided between the two pairs of signal terminal plug-in holes, each pair of signal terminal plug-in holes is respectively arranged on both sides of the baseline, the bending portions of multiple signal terminals extend alternately to both sides of the baseline and the signal terminal plug-in portions are respectively correspondingly inserted in the signal terminal plug-in holes and electrically connected to the circuit board, the ground terminal plug-in portion of each ground terminal is respectively correspondingly inserted in the ground terminal plug-in hole and electrically connected to the circuit board; wherein the width of the shielding portion in a direction orthogonal to the baseline is greater than or equal to the length of the bending portion of each signal terminal extending to both sides of the baseline.

[0007] In the embodiment of the present application, a shielding portion is provided at a portion of the ground terminal close to the circuit board, and the width of the shielding portion in a direction orthogonal to the baseline is greater than or equal to the length of the bent portion of the signal terminal, so that the shielding portion can at least shield the bent portion of the signal terminal, thereby solving the problem of crosstalk noise between the signal terminal pairs. Since the ground terminal only has a shielding portion with a larger width in a direction orthogonal to the baseline to achieve an electromagnetic shielding effect, it will not occupy additional space on the circuit board and will not affect the configuration of other electronic components on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a stereogram of an existing electrical connection structure; Figure 2 yes Figure 1 A side view of an electrical connection structure; Figure 3 yes Figure 2 The electrical connection structure along Figure 2 A cross-sectional view of the AA line; Figure 4is a three-dimensional diagram of an electrical connection structure according to an embodiment of the present application; Figure 5 yes Figure 4 A side view of an electrical connection structure; Figure 6 yes Figure 5 A cross-sectional view of the electrical connection structure along line BB; Figure 7 and Figure 8 is a graph of MDFEXT of an electrical connection structure according to an embodiment of the present application relative to a signal frequency; Fig. 9 It is a three-dimensional diagram of an electrical connection structure of another embodiment of the present application. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0010] See also Figure 4 , Figure 5 and Figure 6 , which is a three-dimensional diagram of an electrical connection structure of an embodiment of the present application, Figure 4 A side view of the electrical connection structure and Figure 5 sectional view of the electrical connection structure along line BB; as shown in the figure, this embodiment provides an electrical connection structure, which includes an electrical connector 100 and a circuit board 200. The electrical connector 100 is inserted into the circuit board 200 and is electrically connected to the circuit board 200. In this embodiment, two electrical connectors 100 are arranged on the circuit board 200. Since the two electrical connectors 100 are only different in height and the terminal configuration is the same, one of the electrical connectors 100 is taken as an example for description.

[0011] like Figure 4 and Figure 6 As shown, the electrical connector 100 includes a plurality of pairs of signal terminals 10 and a plurality of ground terminals 20, and the plurality of pairs of signal terminals 10 and the plurality of ground terminals 20 of the electrical connector 100 are arranged into two terminal rows. Each terminal row has a plurality of pairs of signal terminals 10 and a plurality of ground terminals 20, and a ground terminal 20 is arranged between two adjacent pairs of signal terminals 10.

[0012] like Figure 4 and Figure 6As shown, each signal terminal 10 has a bending portion 11 and a signal terminal plug-in portion 12, and the bending portion 11 is adjacent to the signal terminal plug-in portion 12. Each grounding terminal 20 has a shielding portion 21 and a grounding terminal plug-in portion 22, and the shielding portion 21 is adjacent to the grounding terminal plug-in portion 22, and the shielding portion 21 corresponds to the bending portion 11. In addition, each signal terminal 10 also has a signal terminal body 13, and the bending portion 11 is adjacent to the signal terminal body 13 and the signal terminal plug-in portion 12. Each grounding terminal 20 also has a grounding terminal body 23, and the shielding portion 21 is adjacent to the grounding terminal body 23 and the grounding terminal plug-in portion 22. The signal terminal body 13 and the grounding terminal body 23 extend perpendicularly to the circuit board 200. The signal terminal bodies 13 of the plurality of signal terminals 10 and the grounding terminal bodies 23 of the plurality of grounding terminals 20 are arranged in a row perpendicularly to the circuit board 200 along the baseline L on the circuit board 200. The signal terminal bodies 13 of the signal terminals 10 of the two terminal rows and the ground terminal bodies 23 of the ground terminals 20 are arranged in the insulating housing ( Figure 4 The signal terminals 10 and the ground terminals 20 are bent inwardly (not shown) and extend parallel to the circuit board 200, and form two upper and lower terminal rows at the insertion slot of the insulating housing. The signal terminal bodies 13 of the signal terminals 10 and the ground terminal bodies 23 of the ground terminals 20 of the two terminal rows form an arc-shaped elastic structure in the insertion slot, which can clamp the circuit board P inserted into the insertion slot of the electrical connector 100.

[0013] Each signal terminal pair has two signal terminals 10, and the bent portions 11 of the two signal terminals 10 of each signal terminal pair are bent from the signal terminal body 13 and extend toward both sides of the base line L and parallel to the circuit board 200. In addition, in the two adjacent pairs of signal terminals 10 on both sides of the ground terminal 20, the extending directions of the bent portions 11 of the signal terminals 10 on both sides of the ground terminal 20 along the base line L are different.

[0014] like Figure 4 and Figure 6 As shown, the circuit board 200 has a plurality of pairs of signal terminal insertion holes 30 and a plurality of ground terminal insertion holes 40. The plurality of pairs of signal terminal insertion holes 30 and the plurality of ground terminal insertion holes 40 are arranged in two rows along two parallel base lines L on the circuit board 200, and the ground terminal insertion holes 40 are arranged along the base lines L, a ground terminal insertion hole 40 is provided between two pairs of signal terminal insertion holes 30, and each pair of signal terminal insertion holes 30 is respectively arranged on both sides of the base line L.

[0015] Therefore, as mentioned above, the bent portions 11 of the plurality of signal terminals 10 extend alternately to both sides of the base line L and the signal terminal plug-in portions 12 are respectively correspondingly inserted into the signal terminal plug-in holes 30 and electrically connected to the circuit board 200. The ground terminal plug-in portions 22 of each ground terminal 20 are respectively correspondingly inserted into the ground terminal plug-in holes 40 and electrically connected to the circuit board 200. The signal terminal plug-in portions 12 of the signal terminal 10 and the ground terminal plug-in portions 22 of the ground terminal 20 have an elastic crimping structure, which may be a fisheye crimping structure, comprising arc-shaped protrusions on both sides and a hole arranged between the two arc-shaped protrusions, the arc-shaped protrusions abutting against the hole walls of the signal terminal plug-in holes 30 and the ground terminal plug-in holes 40, and the restoring force generated by the arc-shaped protrusions being pushed and deformed by the hole walls of the signal terminal plug-in holes 30 and the ground terminal plug-in holes 40 forms a retention force for positioning the signal terminal 10 and the ground terminal 20 in the signal terminal plug-in holes 30 and the ground terminal plug-in holes 40, respectively. In the above structure, the baseline L passes through the midpoint of the shielding portion 21, and the bent portion 11 of each signal terminal 10 is closer to the circuit board 200 than the signal terminal body 13. Moreover, the bent portion 11 is arranged to be as close to the circuit board 200 as possible. The shielding portion 21 of each grounding terminal 20 is closer to the circuit board 200 than the grounding terminal body 23. The shielding portion 21 of the grounding terminal 20 is also arranged to be as close to the circuit board 200 as possible.

[0016] The width of the shielding portion 21 in the direction perpendicular to the baseline L is greater than or equal to the length of the bending portion 11 of each signal terminal 10 extending to both sides of the baseline L. This plays an electromagnetic shielding role and solves the problem of crosstalk noise between the signal terminal pairs. The electrical connection structure of the present application is simulated, as shown in FIG. Figure 7 and Figure 8 As shown, the integrated crosstalk noise (ICN) is reduced to a range of 1.5 to 1.9, which is much smaller than the 3.6 of the OIF specification. Therefore, the electrical connection structure of the present application is in compliance with the specification.

[0017] like Figure 4As shown, in this embodiment, the width of the ground terminal body 23 in the extension direction of the baseline L is greater than the width of the signal terminal body 13 in the extension direction of the baseline L. Moreover, the width of the shielding portion 21 of the ground terminal 20 in the direction orthogonal to the baseline L is equal to the width of the ground terminal body 23 of the ground terminal 20 in the extension direction of the baseline L. That is, the width of the shielding portion 21 used to shield the signal terminal 10 is equal to the width of the ground terminal body 23. The ground terminal 20 also includes a connecting portion 24, the connecting portion 24 connects the ground terminal body 23 and the shielding portion 21, the two ends of the connecting portion 24 are respectively connected to the midpoint of one end of the ground terminal body 23 and the midpoint of one end of the shielding portion 21, and the connecting portion 24 is twisted. That is, during the manufacturing process of the ground terminal 20, the shielding portion 21 and the ground terminal body 23 can be formed by the same metal strip, and then the connecting portion 24 connecting the shielding portion 21 and the ground terminal body 23 is twisted 90 degrees to form a structure in which the width directions of the shielding portion 21 and the ground terminal body 23 are orthogonal to each other.

[0018] See also Fig. 9 , which is a partial stereogram of an electrical connection structure of another embodiment of the present application. As shown in the figure, the width of the ground terminal body 23 is the same as the width of the signal terminal body 13, and the width of the shielding portion 21 of the ground terminal is larger than the width of the ground terminal body 23. Similarly, the width of the shielding portion 21 formed by twisting the connecting portion 24 connecting the shielding portion 21 and the ground terminal body 23 by 90 degrees can play an electromagnetic shielding effect on the bending portion 11 of the signal terminal 10.

[0019] In another embodiment, the bent portion can be directly formed from the bend of the signal terminal body, and the bent portion is twisted 90 degrees and inserted into the signal terminal jack of the circuit board. The simulation results of this structure show that the integrated crosstalk noise (ICN) is also reduced to 1.9, which also meets the specification.

[0020] In summary, the present application provides an electrical connection structure, which solves the problem of crosstalk noise between signal terminal pairs by setting a shielding portion at the part of the grounding terminal close to the circuit board, and the width of the shielding portion in the direction orthogonal to the baseline is greater than or equal to the length of the bending portion of the signal terminal, so that the shielding portion can at least shield the bending portion of the signal terminal, and the electromagnetic shielding effect can be achieved because the grounding terminal only has a shielding portion with a larger width in the direction orthogonal to the baseline, which will not occupy additional space on the circuit board and will not affect the configuration of other electronic components on the circuit board.

[0021] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0022] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electrical connection structure, characterized in that: include: An electrical connector, comprising a plurality of pairs of signal terminals and a plurality of grounding terminals, wherein one grounding terminal is arranged between two pairs of adjacent signal terminals, each of the signal terminals comprises a bending portion, a signal terminal plug-in portion and a signal terminal body, the bending portion is adjacent to the signal terminal plug-in portion, the bending portion is adjacent to between the signal terminal body and the signal terminal plug-in portion, each of the grounding terminals comprises a shielding portion, a grounding terminal plug-in portion and a grounding terminal body, the shielding portion is adjacent to between the grounding terminal body and the grounding terminal plug-in portion, and the shielding portion corresponds to the bending portion; A circuit board, comprising a plurality of pairs of signal terminal plug-in holes and a plurality of ground terminal plug-in holes, wherein the plurality of ground terminal plug-in holes are arranged along a base line, the signal terminal bodies of the plurality of signal terminals and the ground terminal bodies of the plurality of ground terminals are arranged along the base line, the width of the ground terminal body in the extension direction of the base line is greater than the width of the signal terminal body in the extension direction of the base line, the shielding portion of each ground terminal is closer to the circuit board than the ground terminal body, one ground terminal plug-in hole is provided between two pairs of signal terminal plug-in holes, each pair of signal terminal plug-in holes is respectively arranged on both sides of the base line, the bending portions of the plurality of signal terminals extend alternately to both sides of the base line, and the signal terminal plug-in portions are respectively correspondingly inserted into the signal terminal plug-in holes and electrically connected to the circuit board, and the ground terminal plug-in portions of each ground terminal are respectively correspondingly inserted into the ground terminal plug-in holes and electrically connected to the circuit board; The width of the shielding portion in a direction perpendicular to the base line is greater than or equal to the length of the bending portion of each signal terminal extending toward both sides of the base line.

2. The electrical connection structure according to claim 1, characterized in that: The width of the shielding portion of the ground terminal in a direction orthogonal to the base line is equal to the width of the ground terminal body of the ground terminal in the extending direction of the base line.

3. The electrical connection structure according to claim 2, characterized in that: The grounding terminal also includes a connecting portion, which connects the grounding terminal body and the shielding portion. Two ends of the connecting portion are respectively connected to the midpoint of one end of the grounding terminal body and the midpoint of one end of the shielding portion, and the connecting portion is twisted.

4. The electrical connection structure according to claim 1, characterized in that: The width of the shielding portion of the ground terminal in a direction perpendicular to the circuit board is greater than the width of the bending portion of the signal terminal in a direction perpendicular to the circuit board.

5. The electrical connection structure according to claim 1, characterized in that: The baseline passes through a midpoint of the shield.

6. The electrical connection structure according to claim 1, characterized in that: The bent portion of each of the signal terminals is closer to the circuit board than the signal terminal body.

7. The electrical connection structure according to claim 1, characterized in that: The signal terminal plug-in portion of the signal terminal and the ground terminal plug-in portion of the ground terminal have an elastic crimping structure, which includes arc-shaped protrusions on both sides and a hole arranged between the two arc-shaped protrusions, and the arc-shaped protrusions abut against the hole walls of the signal terminal plug-in hole and the ground terminal plug-in hole.

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