CN113193398B

CN113193398B - Shielding contact structure, female terminal connector and connector assembly

Info

Publication number: CN113193398B
Application number: CN202110444162.4A
Authority: CN
Inventors: 关中杰; 程喜乐; 祝乾坤
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-03-29
Anticipated expiration: 2041-04-23
Also published as: CN113193398A

Abstract

The invention relates to a shielding contact structure, a female end connector and a connector assembly, wherein the female end connector comprises an insulating shell and a plurality of terminal modules distributed in the insulating shell in a row, each terminal module comprises a terminal, an injection molding insert and a shielding sheet, each terminal is provided with a grounding terminal and a signal terminal, a shielding contact part used for being in contact with a male end ground pin when the connector is plugged in and closed is arranged on each shielding sheet, each shielding contact part comprises a shielding convex hull and a shielding elastic sheet which are distributed at intervals along the length direction of the grounding terminal grounding contact, and the shielding convex hulls and the shielding elastic sheets are raised or tilted towards the direction close to the grounding terminal so as to realize sequential matched contact with the male end ground pins. The shielding plate structure of the female end connector not only solves the problem that the transmission performance of a pure convex hull in a high-frequency band is deteriorated, but also solves the problems that the double spring plates are complex to process, the spring plates are easy to yield and poor in contact, and simultaneously optimizes the indexes of crosstalk, impedance, return loss and the like of the connector in high-speed transmission and improves the quality of signal transmission.

Description

Shielding contact structure, female terminal connector and connector assembly

Technical Field

The invention belongs to the technical field of connectors, and particularly relates to a shielding contact structure, a female terminal connector using the shielding contact structure and a connector assembly.

Background

In the existing connector, in a male-female matching area, two contact modes of a contact pin at a male end and a shield sheet are provided, namely, convex hull contact and elastic claw contact, the contact aims at enabling the shield sheet to be in contact with a ground pin at the male end in a wider range so as to enhance the shielding effect between signals, and in order to maintain the stress balance of the contact pin at the matching area, when the convex hull contact is adopted, the ground pin contact is just in contact with the convex hull, but except for the convex hull, the rest areas of the contact pin are free of points in contact with the shield sheet, so that the performance of the connector at a high frequency section, particularly crosstalk deterioration is caused. In addition, the convex hull and the contact pin are rigid parts, and the actual contact state of the convex hull and the contact pin is local line contact after matching, so that the contact cannot be improved only by increasing the area of the convex hull.

At present, a product adopts a front and back double-elastic-piece mode to contact with a contact pin, but the double-elastic-piece mode is complex to process, the position and the size cannot be simultaneously guaranteed, whether the contact is well influenced by the state of the elastic piece is large, meanwhile, due to the fact that the contact pin is short, cantilevers of the front and back double elastic pieces are small, and the male and female parts are easy to yield after being matched, poor contact is caused.

Disclosure of Invention

Based on the defects of the shielding convex hull and the shielding elastic sheet adopted by the existing product in the male and female matching area, the invention provides the shielding contact structure with the novel structure and the female end connector using the shielding contact structure, so that the problem that the transmission performance of a single convex hull is deteriorated in a high-frequency section is solved, the problems that the double elastic sheets are complex to process, the elastic sheets are easy to yield and poor in contact are solved, the indexes of crosstalk, impedance, echo loss and the like of the connector in high-speed transmission are optimized, and the quality of signal transmission is improved.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the female terminal connector provided by the invention, the female terminal connector comprises an insulating shell and a plurality of terminal modules distributed in the insulating shell in a row, each terminal module comprises a terminal, an injection molding insert and a shielding sheet, each terminal comprises a grounding terminal and a signal terminal, a shielding contact part used for being in matched contact with a male ground pin is further arranged on each shielding sheet, each shielding contact part comprises a shielding convex hull and a shielding elastic sheet located on one side of each shielding convex hull, and the shielding convex hulls and the shielding elastic sheets are raised or tilted towards the grounding terminal, so that the female terminal connector is sequentially in matched contact with the male ground pins when the connector is inserted.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the female terminal connector, adjacent signal terminals form a signal differential pair, and the adjacent signal differential pairs are separated by a ground terminal; at least one side of the shielding contact part is provided with a shielding shell, and the shielding shell is pulled away from the signal terminal side to provide shielding protection for the signal contact of the signal differential pair.

In the female terminal connector, the top of the shielding convex hull has a flat surface, and the contact area of the ground contact of the ground terminal corresponds to the flat surface of the top of the shielding convex hull, so that the two sides of the ground pin are stressed in a balanced manner when the ground pin of the male terminal is inserted.

In an embodiment, the shielding convex hull and the shielding elastic sheet are formed by stamping the shielding sheet, the rear end of the shielding elastic sheet is a fixed end, and the front end of the shielding elastic sheet is a free end which can be flexibly tilted along with the insertion of the male ground pin.

In an embodiment of the invention, the shielding elastic piece has a tilted height greater than a raised height of the shielding convex hull, so as to achieve contact with the ground pin of the male terminal.

In an embodiment, the length of the cantilever of the shielding elastic piece is greater than 1mm, so as to prevent the shielding elastic piece from yielding after tilting.

In an embodiment of the invention, the terminal module includes a terminal module a and a terminal module B, and the shielding shells of the shielding members of the adjacent terminal module a and the adjacent terminal module B are staggered with each other, so that the shielding contact portion of one terminal module and the shielding shell of the other terminal module are at least partially aligned. The female end connector further comprises a terminal module buckle plate and a fixing piece, wherein the terminal module buckle plate and the fixing piece are used for achieving fixing between the terminal modules.

The purpose of the invention and the technical problem to be solved are also realized by adopting the following technical scheme. According to the connector assembly provided by the invention, the connector assembly comprises a male end connector and a female end connector, and is characterized in that: the female end connector is the female end connector.

The purpose of the invention and the technical problem to be solved can also be realized by adopting the following technical scheme. According to the shielding contact structure provided by the invention, the shielding contact structure comprises the shielding sheet.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

the structure of the shielding plate not only solves the problem that the transmission performance of a pure convex hull is deteriorated in a high-frequency band, but also solves the problems that the double spring plates are complex to process, the spring plates are easy to yield and poor in contact, and meanwhile, the indexes of crosstalk, impedance, return loss and the like of the connector in high-speed transmission are optimized, and the quality of signal transmission is improved.

Drawings

FIG. 1 is a schematic structural view of a female end connector according to the present invention;

FIG. 2 is a schematic view of the female end connector of the present invention after insertion;

FIG. 3 is a first schematic view of a terminal module of the present invention;

FIG. 4 is a schematic view of a second side of the terminal module A according to the present invention;

FIG. 5 is a first schematic view of a B-terminal module according to the present invention;

FIG. 6 is a schematic view of a second side of the B-terminal module of the present invention;

fig. 7 is a schematic view of a shield plate of the a-terminal module of the present invention;

FIG. 8 is a side view of FIG. 7;

fig. 9 is a schematic view of a shield plate of the B-terminal module of the present invention;

FIG. 10 is a schematic view of the insertion end of the female end connector of the present invention;

FIG. 11 is a front view of a female end connector of the present invention;

FIG. 12 is a cross-sectional view A-A of FIG. 11;

fig. 13 is a partially enlarged view of fig. 12.

[ description of main element symbols ]

1: female end connector

2: a terminal module

3: b terminal module

4: insulating shell

41: convex part

5: shielding sheet

51: a terminal module shielding sheet

52: b terminal module shielding sheet

53: shielding drawer shell

54: shielding convex hull

541: top part

5411: plane surface

55: shielding elastic sheet

56: convex edge

6: injection molding insert

7: terminal with a terminal body

71: grounding contact

72: signal contact

8: fixing sheet

9: terminal module buckle

10: plug-in end

11: jack hole

12: virtual shielding cavity

13: shield contact

14: male end connector

15: male end ground needle

16: male end signal needle

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the female terminal connector according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-13, which are schematic views of the structure of each part of the female terminal connector of the present invention, the female terminal connector 1 includes an insulating housing 4 and a plurality of terminal modules arranged in the insulating housing. In the embodiment of the present invention, the female terminal connector 1 is a bent connector, the tail of the bent connector is further provided with a terminal module buckle plate 9 for realizing the connection between the terminal modules, and the bent parts of the terminal modules are further fixed together by a fixing plate 8.

The terminal module comprises a terminal module A2 and a terminal module B3, and the terminal module A and the terminal module B are composed of a shielding sheet 5, a terminal 7 and an injection molding insert 6, wherein the terminal 7 is located in the injection molding insert 6, and the shielding sheet 5 covers the first surface of the injection molding insert 6. When the connector is assembled, the a terminal module 2 and the B terminal module 3 are assembled by being staggered in the insulating housing 4 in the form of ABABAB …. Since the first face of each terminal module is the shielding plate 5, when the above-mentioned a terminal module 2 and B terminal module 3 are assembled in a staggered manner, the a terminal module shielding plate 51 of the a terminal module 2 realizes shielding of the first face of its inner terminal, and the shielding of the second face of the terminal is realized by the B terminal module shielding plate 52 on the first face of its adjacent B terminal module.

The terminals 7 include a ground terminal and a signal terminal, and the two signal terminals form a signal differential pair for transmitting signals, and adjacent signal differential pairs are arranged at intervals through one ground terminal. The ground terminal is provided with a ground contact 71 at the plugging end for being matched and plugged with the male ground pin 15, and the signal terminal is provided with a signal contact 72 at the plugging end for being matched and plugged with the male signal pin 16. In the embodiment of the present invention, the ground contact 71 and the signal contact 72 are both of a spring structure, but not limited thereto.

The extension area of the shielding sheet 5 is provided with a shielding contact part 13, the shielding contact part 13 and the ground contact 71 form a clamping cavity for the male-end ground pin 15 to insert, and the shielding contact part 13 and the ground contact 71 are simultaneously contacted with the male-end ground pin 15 when the connector is plugged, so that shielding conduction is realized. The shielding contact part 13 comprises shielding convex hulls 54 and shielding elastic sheets 55 which are distributed at intervals along the length direction of the corresponding grounding contact 71, the shielding convex hulls 54 and the shielding elastic sheets 55 are raised or tilted towards the direction of the grounding contact 71, and the raised or tilted parts of the shielding convex hulls 54 and the shielding elastic sheets are in contact with the male ground pin successively.

The extension region of the shielding plate 5 is further provided with a shielding shell 53 for providing shielding protection for the signal contacts 72 of the signal differential pairs, and since at least one pair of signal differential pairs is distributed on one side of each ground terminal, at least one side of any shielding contact part 13 is provided with the shielding shell 53 (i.e. a shielding convex structure), that is, when the ground terminal is located at the edge of the terminal module, one side of the corresponding shielding contact part 13 is provided with the shielding shell 53, and at other positions, both sides are provided with the shielding shells 53. After the terminal module is assembled, the shielding shell 53 is opposite to the signal contact 72 of the signal terminal, the shell pulling direction (i.e. the protruding direction) is far away from the signal contact 72, at this time, the shielding convex hull 54 and the shielding elastic sheet 55 are opposite to and in contact with the ground contact 71, and the protruding direction of the shielding convex hull 54 and the shielding elastic sheet 55 is close to the ground contact 71.

The shielding convex hull 54 of the invention is a convex hull punched by stamping on the shielding sheet 5, the top 541 of the shielding convex hull has a flat surface 5411, and after the connector is assembled, the shielding convex hull 54 needs to be leaked to the jack 11 of the insulating shell 4 by observing from the inserting end vertically, so that the male end earth pin 15 is contacted with the shielding convex hull 54 when being inserted from the jack 11. The shielding convex hulls 54 are all only contacted with the male ground pin 15, and the male ground pin 15 is connected with the shielding sheets 5 in series in the insertion area. Meanwhile, the position of the shielding convex hull 54 is required to be as close to the insertion end as possible to optimize high-speed performances such as crosstalk, poor return loss and the like, and in practical application, the contact area of the grounding contact 71 must correspond to the flat surface 5411 of the convex hull to balance the stress on two sides when the male-end contact pin is inserted.

The shielding shell fragment 55 and the shielding convex closure 54 appear in groups to form the shielding contact part 13, and after the connector is completely inserted and closed, the shielding shell fragment 55 is simultaneously contacted with the ground pin of the male end, and the shielding shell fragment 55 is also formed by stamping a metal shielding sheet, and the tilting height of the shielding shell fragment 55 is required to be larger than the protruding height of the shielding convex closure 54 so as to be contacted with the ground pin of the male end. In addition, the rear end of the shielding elastic sheet 55 is fixed on the shielding sheet 5 body, and the front end of the shielding elastic sheet is a free end capable of being freely tilted, so that the elastic sheet can be flexibly tilted along with the insertion of the ground pin, and in order to avoid the shielding elastic sheet from generating structural yielding after tilting, the cantilever length of the shielding elastic sheet is required to be larger than 1 mm.

In the embodiment of the present invention, the shielding shell 53 of the shielding members 5 of the a terminal module and the B terminal module are staggered, wherein at least a part of the shielding contact portion 13 formed by the shielding convex hull 54 and the shielding elastic sheet 55 of one terminal module is directly opposite to a part of the shielding shell 53 of the other terminal module, so that after the male terminal and the female terminal are matched, when the male terminal ground pin 15 is inserted between the ground contact 71 and the shielding contact portion 13, together with the shielding sheets 5 at both sides, the signal differential pair formed by the signal contact 72 and the male terminal signal pin 16 is surrounded, thereby forming a virtual shielding cavity 12, and realizing the full-surrounding shielding of the signal differential pair. The arrangement of the shielding shell 53, the shielding convex hull 54 and the shielding elastic sheet 55 can reduce the gap between the differential pairs, so as to reduce the energy radiation between signals, optimize the return flow path of the radiation energy, achieve the purpose of optimizing crosstalk, further optimize the impedance of the region, and optimize the indexes such as return loss. The structure of the shielding plate not only solves the problem that the transmission performance of a pure convex hull is deteriorated in a high-frequency band, but also solves the problems that the double spring plates are complex to process, the spring plates are easy to yield and poor in contact, and meanwhile, the indexes of crosstalk, impedance, return loss and the like of the connector in high-speed transmission are optimized, and the quality of signal transmission is improved.

After the assembly of the shielding sheet 5 is completed, the shielding shell 53 of the shielding sheet is corresponding to the signal jack of the insulating shell, is positioned outside the signal jack and is matched with the insulator outside the signal jack, and the partial insulator is matched with the signal contact to realize the reliable contact between the signal contact and the male-end signal pin. At this time, the shielding convex hull 54 and the shielding elastic sheet 55 are positioned in the groove between the signal jacks for accommodating the ground contact, and a hole for inserting the male ground pin 15 is formed between the ground contact and the shielding convex hull. The shielding plate 5 is further provided with a convex edge 56 on the front end face at the shielding convex hull 54, and the convex edge 56 is used for realizing seamless butt joint between the shielding convex hull 54 and the insulating shell in the contact extending direction. In the embodiment of the present invention, a convex portion 41 is disposed on the outer side of the insulating housing 4 corresponding to the shielding convex hull.

In the embodiment of the invention, the convex edge is inserted into the inner side of the convex part 41 in a guiding way, so that seamless butt joint with the insulating shell is realized. The arrangement of the ledge 56 and the protrusion 41 enables seamless connection between the shielding convex hull 54 and the insulating housing through the overlapping corresponding connection, thereby realizing reliable connection of the shielding. Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A female end connector comprises an insulating shell and a plurality of terminal modules distributed in the insulating shell in a row, wherein each terminal module comprises a terminal, an injection molding insert and a shielding sheet, each terminal comprises a grounding terminal and a signal terminal, and the female end connector is characterized in that the shielding sheet is also provided with a shielding contact part which is used for being in matched contact with a male end ground pin, each shielding contact part comprises a shielding convex hull and a shielding elastic sheet which is positioned on one side of the shielding convex hull, and the shielding convex hulls and the shielding elastic sheets are raised or tilted towards the direction of the grounding terminals to realize the sequential matched contact with the male end ground pins when a connector is plugged;

adjacent signal terminals form signal differential pairs, and the adjacent signal differential pairs are separated by a ground terminal; at least one side of the shielding contact part is provided with a shielding shell, and the shielding shell is pulled towards the side far away from the signal terminal to provide shielding protection for the signal contact of the signal differential pair; the terminal module comprises a terminal module A and a terminal module B which are arranged in a staggered mode, and shielding shells of shielding parts of the adjacent terminal module A and the adjacent terminal module B are staggered with each other, so that at least part of the shielding contact part of one terminal module is opposite to the shielding shell of the other terminal module.

2. The female connector of claim 1, wherein the top of the shield projection has a flat surface, and the contact area of the ground contact of the ground terminal corresponds to the flat surface of the top of the shield projection, so that the male ground pin is balanced when inserted.

3. The female end connector of claim 2, wherein the shielding convex hull and the shielding elastic sheet are both formed by punching and molding a shielding sheet, the rear end of the shielding elastic sheet is a fixed end, and the front end of the shielding elastic sheet is a free end which can flexibly tilt along with the insertion of the ground pin at the male end.

4. The female connector according to claim 3, wherein the raised height of the shield spring is greater than the raised height of the shield convex hull to achieve contact with the male ground pin.

5. The female connector according to claim 4, wherein the cantilever length of the shielding spring is greater than 1mm to avoid structural yielding of the shielding spring after tilting.

6. The female connector of claim 1, wherein: the terminal module fixing structure further comprises a terminal module buckle plate and a fixing plate which are used for achieving fixing between the terminal modules.

7. A connector assembly, its characterized in that, includes public end connector and female end connector, its characterized in that: the female end connector is as claimed in any one of claims 1 to 6.

8. A shielding contact structure comprises two shielding sheets which are distributed at intervals, and is characterized in that a shielding contact part is arranged on the insertion end of each shielding sheet, the shielding contact part comprises a shielding convex hull and a shielding elastic sheet which are sequentially distributed along the insertion direction, and at least one side of the shielding contact part is provided with a shielding drawer shell; the protruding/tilting direction of the shielding convex hull and the shielding elastic sheet on the same shielding sheet is opposite to the shell drawing direction of the shielding shell drawing; the convex/tilting directions of the shielding convex hulls and the shielding elastic sheets on different shielding sheets are the same, and the shell drawing direction of the shielding shell drawing is the same; the shielding shells of the two shielding sheets are staggered with each other, so that the shielding contact part of one shielding sheet is at least partially opposite to the shielding shell of the other shielding sheet.