Electric connector

Abstract

An electric connector comprises an insulating base and two terminal modules fixed on the insulating base, each terminal module comprises an insulator, a row of terminals fixed on the insulator and arranged along a first direction, and a grounding piece and a wave absorbing piece which extend along the first direction and are arranged beside the row of terminals, the row of terminals at least comprises a plurality of differential signal pairs and grounding terminals located between the differential signal pairs, and each differential signal pair is composed of two adjacent signal terminals; one sides, close to each other, of the two terminal modules are inner sides, one sides, far away from each other, of the two terminal modules are outer sides, the grounding piece is arranged on the inner side of the insulator, a plurality of grounding fingers extend out of the grounding piece, and the grounding fingers abut against the corresponding grounding terminals one by one; the wave absorbing member is arranged on the outer side of the insulator and does not abut against the signal terminal. Compared with the prior art, the two sides of each row of terminals are provided with the grounding pieces and the wave absorbing pieces, so that the high-speed signal transmission performance is improved.

Description

Technical field

[0001] The present invention relates to an electric connector, in particular to an electric connector suitable for high-speed signal transmission. [Background Technology]

[0002] Chinese invention number CN107706675B discloses an electrical connector comprising an insulating body and two rows of conductive terminals arranged on the insulating body. Each conductive terminal comprises a fixed portion fixed to the insulating body, a contact portion and a pin portion extending from both ends of the fixed portion. The conductive terminals include a ground terminal and a signal terminal. When transmitting high-frequency signals, signal crosstalk resonance will occur between the signal terminals.

[0003] Therefore, it is necessary to provide an electrical connector with an improved structure to overcome the above-mentioned drawbacks. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide an electrical connector that can improve high-speed signal transmission.

[0005] In order to solve the above technical problems, the present invention can adopt the following technical solutions: an electrical connector, comprising an insulating base and two terminal modules fixed to the insulating base, each terminal module comprising an insulator, a row of terminals fixed to the insulator and arranged along a first direction, and a grounding member and an absorbing member extending along the first direction and arranged beside the row of terminals, a row of terminals comprising at least a plurality of differential signal pairs and grounding terminals located between the differential signal pairs, each differential signal pair consisting of two adjacent signal terminals; the side of the two terminal modules close to each other is the inner side, and the side away from each other is the outer side, the grounding member is arranged on the inner side of the insulator, extending a plurality of grounding fingers, the grounding fingers abutting against the corresponding grounding terminals one by one; the absorbing member is arranged on the outer side of the insulator and does not abut against the signal terminals.

[0006] Compared with the prior art, the present invention provides grounding members and wave absorbing members on both sides of each row of terminals, thereby improving high-speed signal transmission performance.

Brief Description of the Drawings

[0007] Figure 1 2 is a perspective view of the electrical connector of the present invention.

[0008] Figure 2 for Figure 1 A three-dimensional image from another angle.

[0009] Figure 3 for Figure 1 Exploded three-dimensional diagram from another angle.

[0010] Figure 4 for Figure 3A three-dimensional view of the insulating base from another angle.

[0011] Figure 5 for Figure 3 A three-dimensional view of the two terminal modules from another angle.

[0012] Figure 6 for Figure 5 Cross-sectional view along dotted line AA.

[0013] Figure 7 for Figure 5 A perspective view of two terminal modules separated from each other.

[0014] Figure 8 for Figure 7 Front view of a terminal module 20A.

[0015] Figure 9 for Figure 7 Rear view of a terminal module 20A.

[0016] Figure 10 for Figure 7 A partial three-dimensional view of a terminal module 20B.

[0017] Figure 11 for Figure 10 Further disassembled stereogram.

[0018] Figure 12 for Figure 7 A three-dimensional view of a terminal module 20B with the insulator removed.

[0019] Figure 13 for Figure 12 Front view of.

[0020] Figure 14 for Figure 12 side view.

[0021]

Component Symbol Description

[0022] Electrical connector 100 Ground terminal 22G First bump 251

[0023] Insulation base 10 Contact portion 221 First bump 252

[0024] Side wall 11 Fixing portion 222 Groove 253

[0025] Docking cavity 12, leg portion 223, retaining block 254

[0026] Butt surface 13 Near edge 224 Reference surface 261

[0027] Spacer rib 141 Far edge 225 Horizontal rib 262

[0028] Terminal slot 14 Grounding piece 23 Vertical rib 263

[0029] Buckling hole 15 Grounding finger 231 Recessed area 2631

[0030] Terminal modules 20, 20A, 20B Shielding portion 232 Rib area 2632

[0031] Insulator 21 Absorber 24 Horizontal groove 264

[0032] Inner side 211 First through hole 241 Vertical groove 265

[0033] The outer side 212 and the second through hole 242 of the metal shell 30

[0034] Terminal 22 aligned with slot 31

[0035] Signal terminal, differential terminal pair 22S

[0036] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. [Specific implementation method]

[0037] Ginseng Figure 1-3 As shown, the present invention is an electrical connector 100, which can be installed on a circuit board for transmitting high-speed connectors. The electrical connector includes an insulating base 10, two terminal modules 20 installed in the insulating base, and a metal shell 30 covering the outside of the insulating base 10. The insulating base 10 includes four side walls 11 and a longitudinal docking cavity 12 formed by the four side walls. The docking cavity 12 passes through the docking surface 13. In this embodiment, the docking surface 13 is the top surface. After the two terminal modules 20 are assembled together, they are installed in the four side walls 11. The inner wall surfaces of two long side walls among the four side walls are provided with terminal grooves 14 separated by a plurality of spacer ribs 141. Figure 4-5 The contact portions 221 of the two rows of terminals in the terminal module extend into the terminal slots 14 and are exposed in the mating cavity 12 for mating with the mating plug connector. The metal shell 30 wraps around the outer side surfaces of the four side walls 11 and forms an alignment groove 31 with one of the side walls.

[0038] Ginseng Figure 5-8 The two terminal modules 20 have the same structure, which is convenient for molding using the same mold. Of course, they can be roughly the same, especially the two rows of terminals 22 are preferably symmetrical to each other. Figure 6As shown, the two rows of terminals in this embodiment are aligned and symmetrical, enabling excellent high-speed signal transmission. Wave-absorbing elements 24 are molded onto the outside of the two terminal modules to effectively absorb external noise and prevent it from affecting signal transmission. Grounding elements 23 are embedded within the terminals to prevent signal interference between the two rows of signal terminals. The grounding elements abut against the grounding terminals to suppress resonance. This improves the connector's FEXT (farend crosstalk), suppresses resonance, and thus enhances the connector's SI performance.

[0039] The specific structure of the terminal module 20 will be described in detail below. To distinguish the two terminal modules, the terminal modules are labeled 20A and 20B respectively.

[0040] Ginseng Figure 12-14 As shown, each terminal module 20 includes an insulator 21, a row of terminals 22 fixed to the insulator 21 and arranged along a first direction, and a grounding member 23 and an absorbing member 24. The grounding member 23 and the absorbing member 24 extend along the first direction and are arranged beside the row of terminals 22. The row of terminals 20 includes at least a plurality of differential signal pairs 20S and grounding terminals 22G located between the differential signal pairs. Each differential signal pair is composed of two adjacent signal terminals 22S. For the convenience of description, the side of the two terminal modules that are close to each other is the inner side 211, and the side that is away from each other is the outer side 212. The grounding member 23 is arranged on the inner side 211 of the insulator 21, and a plurality of grounding fingers 231 are extended from it. The grounding fingers 231 are abutted against the corresponding grounding terminals 22G one by one. The absorbing member 24 is arranged on the outer side 212 of the insulator 21 and does not abut against the signal terminals and the grounding terminals. Figure 14 The terminal 22 includes a contact portion 221, a fixing portion 222 and a pin portion 223. Figure 7 The fixed portion 222 is fixed within the insulator 21, while the contact portion 221 and the pin portion 223 extend above and below the insulator. The grounding element 23 includes two rows of grounding fingers 231: one row of upper grounding fingers extending upward, and one row of lower grounding fingers extending downward. The upper and lower grounding fingers 231 are aligned with each other and abut against the fixed portion 222 of the same ground terminal. The portion between the grounding fingers 231 forms a shielding portion 232, which faces the differential signal pair 22S. When viewed along the first direction, the absorbing member 24 protrudes above and below the grounding element 23.

[0041] Ginseng Figure 13-14 The signal terminals 22S of each differential terminal pair are provided with a near edge 224 and a far edge 225 facing each other. The far edge 225 of the signal terminal fixing portion 222 is retracted relative to the far edge of the contact portion 221, thereby reducing the width of the fixing portion 222. This is used to improve high-frequency performance. In contrast, the width of the contact portion and the fixing portion of the ground terminal are not much different. Figure 14As can be seen in the figure, the shielding portion 232 is facing a differential signal pair 22S, which has a shielding effect. The first and second through-holes 251 and 252 of the absorbing member 24 are facing the signal terminals. In particular, the first through-hole 251 is aligned with the shielding portion 232. The shielding portion 232 can improve the signal interference between the two rows of terminals. The first and second through-holes 251 and 252 try to keep the absorbing member 24 away from the signal terminals to prevent the absorbing member 24 from absorbing energy of normal signal transmission.

[0042] Figure 10-11 As shown, a row of terminals 22 and grounding members 23 are first positioned relative to each other, and then an insulating material is injected. After cooling, the insulator 21 is formed. Then, the absorbing material is injected on the outer side of the insulator 21, and after cooling, the absorbing member 24 is formed. The outer side of the insulator 21 is provided with a plurality of recessed areas for accommodating the absorbing material. At the same time, the protrusions corresponding to the recessed areas cooperate with the through holes of the absorbing material to further fix the absorbing material. More specifically, the insulator 21 is provided with a plurality of first protrusions 251 protruding outward from its outer side, and the absorbing member 24 is provided with a plurality of first through holes 241 fixed one by one to the corresponding first protrusions 251, and each first through hole 241 is aligned one by one with the differential signal pair 22S. The first protrusion 251 is provided with a groove 253 extending along the extension direction of the terminal, and the fixing portion 222 of the differential signal pair is exposed on the bottom surface of the groove 253 ( Figure 10 Clearly displayed). The insulator 21 is provided with a plurality of second protrusions 252 protruding outward from its outer surface. The second protrusions 252 are located above the corresponding first protrusions 251. The absorbing member 24 is provided with a plurality of second through holes 242 fixed one by one to the corresponding second protrusions 252. Each second through hole 242 is aligned one by one with the differential signal pair 22S. The second protrusion is also provided with a groove (which is aligned with the groove 253 but is not numbered). However, in order to fix the terminal, the signal terminal pair here is not exposed in the groove. In this way, except for the first and second through holes, the absorbing member covers the entire outer side of the insulator. Combined Figure 5 The two first protrusions 251 are not provided with grooves, but are further provided with outwardly protruding retaining blocks 254, which are used to retain in retaining holes 15 provided in the insulating base 11, thereby fixing the two terminal modules in the insulating base.

[0043] Ginseng Figure 8-9As shown, the insulator 21 is provided with a reference surface 261, a plurality of horizontal ribs 262, a plurality of vertical ribs 263, and a plurality of horizontal grooves 264 on its inner side. The horizontal ribs 262 and vertical ribs 263 extend laterally and protrude from the reference surface 261, while the horizontal grooves 264 are recessed from the reference surface 261. Each vertical rib 263 is further divided into a recessed area 2631 and a rib area 2632. When the two terminal modules 20A and 20B are assembled relative to each other, the horizontal ribs 262 and horizontal grooves 264 mate with each other, and the recessed area 2631 of the vertical rib 263 mates with the rib area 2632 of the other terminal module. The horizontal ribs 262 and horizontal grooves 264 are located near the bottom surface of the insulator, and vertical grooves 265 are located above them. The vertical grooves 265 are arranged one-to-one with the differential signal pairs 22S, thereby making the insulation material thinner at the differential signal pairs. The contact portion and pins of the terminal are exposed to the air, while the fixed portion is fixed in the insulating material. The dielectric constants of the two are different. Minimize the use of insulating material to minimize the change in the fixed portion relative to the contact portion and pins. The grounding finger 231 of the grounding piece is located exactly at the reference surface 261 and the vertical rib 263. The insulating material is thick enough to ensure that the grounding finger 231 abuts the fixed portion of the ground terminal. The shielding portion 232 can be exposed in the vertical slot 265. Figure 9 The position shown facilitates the positioning of the grounding member 23 in the injection mold, that is, the vertical groove 265 is formed after the mold for positioning the shielding portion is removed from the mold. At the same time, the vertical groove 265 is also conducive to improving high-frequency electrical performance. Of course, the shielding portion 232 may not be exposed in the vertical groove.

[0044] The above embodiments are preferred embodiments of the present invention, but not all embodiments. Any equivalent changes made to the technical solutions of the present invention by persons of ordinary skill in the art after reading the specification of the present invention are covered by the claims of the present invention.

Claims

1. An electrical connector comprising an insulating base and two terminal modules fixed to the insulating base, each terminal module comprising an insulator, a row of terminals fixed to the insulator and arranged along a first direction, and a grounding member and an absorbing member extending along the first direction and disposed adjacent to the row of terminals, the row of terminals comprising at least a plurality of differential signal pairs and grounding terminals located between the differential signal pairs, each differential signal pair comprising two adjacent signal terminals; the side of the two terminal modules closer to each other being an inner side, and the side farther away from each other being an outer side, characterized in that: The grounding member is arranged on the inner side of the insulator and extends a plurality of grounding fingers, which are respectively in contact with corresponding grounding terminals. The absorbing member is arranged on the outer side of the insulator and does not contact the signal terminals.

2. The electrical connector according to claim 1, wherein: The wave absorbing member does not abut against the ground terminal.

3. The electrical connector according to claim 2, wherein: The wave absorbing material is injection-molded on the outer side of the insulator, and forms the wave absorbing member after cooling.

4. The electrical connector according to claim 2, wherein: The insulator is provided with a plurality of first protrusions protruding outward from its outer surface, and the wave absorbing member is provided with a plurality of first through holes fixed one by one on the corresponding first protrusions, and each of the first through holes is aligned one by one with the differential signal pair.

5. The electrical connector according to claim 4, wherein: The first bump is provided with a groove extending along the extending direction of the terminal, and the differential signal pair is exposed at the bottom surface of the groove.

6. The electrical connector according to claim 5, wherein: The insulator is provided with a plurality of second protrusions protruding outward from its outer surface, and the second protrusions are located above the corresponding first protrusions. The absorbing member is provided with a plurality of second through holes fixed one by one to the corresponding second protrusions, and each of the second through holes is aligned one by one with the differential signal pair.

7. The electrical connector according to claim 6, wherein: The wave absorbing member covers the entire outer side surface of the insulator except the first and second through holes.

8. The electrical connector according to claim 1, wherein: The terminal includes a fixed portion fixed in an insulator and a contact portion and a pin portion extending out of the insulator. The terminals of each differential terminal pair are provided with proximal edges and distal edges opposite to each other. The distal edge of the signal terminal is retracted relative to its contact portion, thereby reducing the width of the fixed portion.

9. The electrical connector according to claim 8, wherein: The insulator is provided with a reference plane, a plurality of horizontal ribs, a plurality of vertical ribs and a plurality of horizontal grooves on its inner side. The horizontal ribs and the vertical ribs extend laterally and protrude from the reference plane, and the horizontal grooves are recessed from the reference plane. Each of the vertical ribs is further divided into a recessed area and a rib area. When the two terminal modules are assembled together, the horizontal ribs and the horizontal grooves match each other, and the recessed area and the rib area of ​​the vertical ribs match each other.

10. The electrical connector according to claim 9, wherein: The horizontal ribs and the horizontal grooves are arranged adjacent to the bottom surface of the insulator, and vertical grooves are arranged above them. The vertical grooves are arranged in a one-to-one correspondence with the differential signal pairs.

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