CN110391550B

CN110391550B - Electric connector

Info

Publication number: CN110391550B
Application number: CN201910662049.6A
Authority: CN
Inventors: 袁俊峰; 屈峰成; 鲁中原; 马陆飞; 付金辉; 金晓光
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-12-04
Anticipated expiration: 2039-07-22
Also published as: CN110391550A

Abstract

The present invention relates to an electrical connector. An electrical connector comprising: a housing; the signal contact module comprises an insulating substrate, differential signal pairs and shielding sheets, wherein the differential signal pairs are provided with signal plugging ends, and the shielding sheets are provided with grounding plugging ends between the plugging ends of two adjacent differential signal pairs; the shielding net frame is arranged on the shell, and the signal plug-in end and the grounding plug-in end of each differential pair penetrate through meshes of the shielding net frame; the signal plug-in ends are spaced from the hole walls of the corresponding meshes, and the grounding plug-in ends are electrically contacted with the hole walls of the corresponding meshes. The electric connector is provided with the shielding net frame in the casing, and the signal grafting end and the ground connection grafting end on the signal contact piece pass from the shielding net frame to ground connection grafting end and the pore wall electrical contact that corresponds the mesh can shield the signal grafting end around the signal grafting end through the shielding net frame, have effectively reduced crosstalk and resonance between the differential signal pair, have improved the SNR of transmission signal.

Description

Electric connector

Technical Field

The present invention relates to an electrical connector.

Background

Currently, in the field of communications, as the signal transmission rate is continuously increased, the design requirements for electrical connectors are also continuously increased. The utility model discloses an electric connector, including first terminal module, second terminal module and the shielding piece of setting in the second terminal module outside, first terminal module includes first insulating block and a plurality of first conductive terminal of setting on first insulating block, and second terminal module structure is the same with first terminal module structure, including second insulating block and a plurality of second conductive terminal, first conductive terminal and second conductive terminal, and the publication number of authorizing is CN201774063U, and the publication date of authorizing is 2011.03.23. The contact parts of the first conductive terminal and the second conductive terminal are inserted into the terminal accommodating grooves of the insulating body, and the first conductive terminal and the second conductive terminal can be arranged to form a differential signal terminal pair.

The electric connector is only provided with the shielding sheets among the insulating blocks, and the plugging position is not shielded, so that signal crosstalk at the plugging position is serious, and the transmission quality is influenced.

Disclosure of Invention

The invention aims to provide an electric connector to solve the problems that signal crosstalk is serious at a plugging position and transmission quality is influenced because shielding is not carried out at the plugging position in the prior art.

In order to achieve the purpose, the technical scheme of the electric connector is as follows:

an electrical connector, comprising: a housing; the signal contact module comprises an insulating substrate, and a differential signal pair and a shielding sheet which are arranged on the insulating substrate, wherein the differential signal pair is provided with a signal plugging end used for being plugged and matched with the adaptive connector, and the shielding sheet is provided with a grounding plugging end between the plugging ends of two adjacent differential signal pairs; the shielding net frame is arranged on the shell, and the signal plug-in end and the grounding plug-in end of each differential pair penetrate through meshes of the shielding net frame; the signal plug-in ends are spaced from the hole walls of the corresponding meshes, and the grounding plug-in ends are electrically contacted with the hole walls of the corresponding meshes.

The invention has the beneficial effects that: according to the electric connector, the shielding net frame is arranged in the shell, the signal plugging end and the grounding plugging end on the signal contact block penetrate through the shielding net frame, the grounding plugging end is electrically contacted with the hole wall of the corresponding mesh, the signal plugging end can be shielded around the signal plugging end through the shielding net frame, crosstalk and resonance between differential signal pairs of the two connectors at the plugging position are effectively reduced, and the signal-to-noise ratio of transmission signals is improved.

Furthermore, the grounding plug-in end is a clip-type plug-in end, a guide groove is formed in the hole wall of the mesh hole for the grounding plug-in end to penetrate through, protruding structures extending along the width direction of the two sheet bodies of the clip-type plug-in end are arranged at positions far away from the plug-in port, and when the grounding plug-in end penetrates through the corresponding mesh hole, the protruding structures are inserted into the corresponding guide grooves, so that the grounding plug-in end is electrically connected with the shielding mesh frame. The protruding structure cartridge is in the guide slot back, except can be connected ground connection grafting end and shielding net frame electricity, also can carry on spacingly to the lamellar body of ground connection grafting end, and the lamellar body can keep relevant position when pegging graft, has increased the holding power of ground connection grafting end, pegs graft more stably.

Further, the protruding structure is a strip extending in the overhanging direction of the corresponding sheet body. The contact area of the strip-shaped protruding structure and the guide groove is large, and the limiting effect on the sheet body is better.

Furthermore, at the position that corresponds with the protruding structure on the overhanging direction of clip formula grafting end, the two lamellar bodies of clip formula contact segment are in one side body coupling of the structure that bulges back to and form the U-shaped section, and the clip formula contact segment meets through the one side pore wall of protruding structure and mesh, through the diapire and the opposite side pore wall butt of U-shaped section. After two lamellar body coupling becomes the U-shaped section, two lamellar body relative position are more fixed, can strengthen the lamellar body at the holding power of grafting part to the diapire and the pore wall butt of U-shaped section also can improve the electric connection effect between ground connection grafting end and the shielding net frame.

Furthermore, the shielding plate covers the differential signal pair in the insulating substrate from one side of the insulating substrate in the thickness direction, and a butting structure is arranged at a position corresponding to the signal insertion end on the shielding plate and is used for electrically contacting with the shielding net frame. The electric connection effect of the shielding sheet and the shielding net frame can be improved through the abutting structure.

Furthermore, the abutting structure is an abutting elastic sheet which is cantilevered to one side of the shielding sheet, and the abutting elastic sheet is elastically abutted with the side face of the shielding screen frame. The abutting elastic sheet has elasticity, certain assembly deviation can be allowed between the signal contact module and the shielding screen frame, and the shielding sheet is more stable in electric contact with the shielding screen frame through the abutting structure.

Furthermore, the two shielding plates are respectively installed on two side plate surfaces of the insulating substrate, two signal contact pieces of the differential signal pairs are arranged at intervals in the plate thickness direction, the two grounding plug-in ends are respectively arranged between two adjacent differential signal pairs on the two shielding plates, and the two grounding plug-in ends between the two adjacent differential signal pairs respectively correspond to the two signal plug-in ends of the differential signal pairs. The two shielding pieces are arranged, and the grounding insertion ends corresponding to the signal insertion ends are arranged on the two shielding pieces, so that the energy consumption insertion ends can be better shielded.

Furthermore, the number of the signal contact modules is more than two, the signal contact modules are arranged side by side in the thickness direction of the insulating substrate, and the differential signal pairs of two adjacent signal contact modules are arranged in a staggered mode. The electric connector is provided with the plurality of signal contact modules, so that the butt joint efficiency can be improved, and the crosstalk between the differential signal pairs of the adjacent signal contact modules can be reduced by staggering the differential signal pairs of the two adjacent signal contact modules.

Furthermore, the differential signal pairs are provided with signal pins used for being connected with the printed board, the shielding plate is provided with a grounding pin between the signal pins of the two adjacent differential signal pairs, the connector further comprises a shielding pinch plate fixedly connected with the shell, the shielding pinch plate is provided with an avoiding channel for the signal pins and the grounding pins to penetrate out, and the shielding pinch plate is electrically contacted with the shielding plate. After the shielding buckle plate is electrically connected with the shielding sheet, the shielding sheets in the signal contact module can be enhanced to be electrically connected, and crosstalk and resonance between differential signal pairs are effectively reduced.

Drawings

FIG. 1 is a schematic diagram of an electrical connector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a signal contact module in an embodiment of an electrical connector according to the present invention;

fig. 3 is an exploded view of a signal contact module in an embodiment of the electrical connector of the present invention;

fig. 4 is a schematic structural view of a shielding plate of a signal contact module in an embodiment of the electrical connector of the present invention;

fig. 5 is a schematic structural diagram of a shielding frame in an embodiment of the electrical connector of the present invention;

fig. 6 is a schematic view of a ground mating terminal inserted into a ground jack according to an embodiment of the electrical connector of the present invention;

fig. 7 is a schematic view of a signal contact module assembled with a shielding frame in an embodiment of an electrical connector of the present invention;

FIG. 8 is a schematic view of a cover plate according to an embodiment of the electrical connector of the present invention;

FIG. 9 is a schematic view of another angle of the cover plate in the embodiment of the electrical connector of the present invention;

description of reference numerals: 1-a shell; 2-a signal contact module; 21-an insulating substrate; 22-a signal contact; 23-a shielding sheet; 231-abutting the spring plate; 24-a signal jack terminal; 25-a ground connection plug-in terminal; 251-U-shaped section; 252-a protruding structure; 26-a signal pin; 27-a ground pin; 3-shielding a screen frame; 31-a ground jack; 311-a guide groove; 32-a signal jack; 4-cover plate; 41-clamping plate; 42-connecting beam; 43-buckling; 5-shielding buckle plate.

Detailed Description

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

In an embodiment of the electrical connector of the present invention, as shown in fig. 1, the electrical connector includes a housing 1, and a plurality of pairs of signal contact modules 2 and a shielding frame 3 disposed in the housing 1 for shielding the signal contact modules 2 at the plugging position.

The signal contact modules 2 in this embodiment are two types, which are respectively a first signal contact module and a second signal contact module, and taking the first signal contact module as an example, as shown in fig. 2, 3, and 4, the signal contact module 2 includes an insulating substrate 21, two pairs of differential signal pairs are disposed on the insulating substrate 21, two signal contacts 22 in each pair of differential signal pairs are symmetrically disposed on both sides of the insulating substrate 21 in the thickness direction, and the two pairs of differential signal pairs are disposed at intervals. The shield plate 23 is attached to both side plate surfaces of the insulating substrate 21, a groove corresponding to the shape of the signal contact 22 is punched in the shield plate 23, and the signal contact 22 is interposed between the shield plate 23 and the insulating substrate 21 after the shield plate 23 and the insulating substrate are fixed. In other embodiments, only one shielding plate may be disposed on each signal contact module, and the shielding plate is located between adjacent signal contact modules after the plurality of signal contact modules are arranged side by side. In other embodiments, the signal contact module may also include two insulating substrates and two shielding plates, one shielding plate corresponding to each insulating substrate, and one signal contact in a differential signal pair mounted on each insulating substrate.

The differential signal pair is provided with signal plugging ends 24 for plugging and matching with the adaptive connector, the signal plugging ends 24 are correspondingly connected with the signal contact elements 22 one by one, and the signal plugging ends 24 overhang the plate surface of the insulating substrate so as to be convenient for plugging. The two shielding plates 23 are provided with ground plug terminals 25 between and outside the signal plug terminals 24 of two adjacent differential signal pairs, that is, the insulating substrate 21 has two pairs of signal plug terminals 24 and three pairs of ground plug terminals 25, and the signal plug terminals 24 and the ground plug terminals 25 are arranged in a staggered manner. The differential signal pairs also have signal pins 26 for connection to the printed board, and the two shields 23 have ground pins 27 between and outside the signal pins 26 of two adjacent differential signal pairs.

The grounding plug-in terminal 25 in this embodiment is a clip-type plug-in terminal having two oppositely disposed plate bodies, one end of the two plate bodies close to the signal contact member 22 is integrally connected to form a U-shaped section 251, and the end far away from the contact member is still two oppositely disposed plate bodies for clamping with the plug-in terminal of the mating connector. The two sheets of the clip-type plug-in terminal extend outward from the bottom wall of the U-shaped section 251 at the U-shaped section 251 to form a strip-shaped protruding structure 252, and the protruding structure 252 is used for matching with the shielding mesh frame 3.

The second signal contact module is similar in structure to the first signal contact module except that the second signal contact module has three pairs of differential signal pairs and thus three pairs of signal mating terminals 24, two pairs of ground mating terminals 25 are provided between the three pairs of signal mating terminals 24, and the signal mating terminals 24 and the ground mating terminals 25 are arranged alternately.

The shielding mesh frame 3 is realized by plastic plating or conductive rubber, and has a certain thickness, the shielding mesh frame 3 is installed in the housing 1, as shown in fig. 5, 6 and 7, the shielding mesh frame 3 is provided with a pair of ground jacks and a signal jack 32, the pair of ground jacks and the signal jack 32 are arranged in an array, and the two jacks are arranged in a staggered manner in the row direction and the column direction. The signal jack 32 can be inserted by two signal plug terminals 24 correspondingly arranged on the insulating substrate 21 on the contact module in the thickness direction, and the ground jack pair includes two ground jacks 31, each ground jack 31 is used for inserting the ground plug terminal 25. The pair of ground jacks and the signal jacks 32 on the shielding mesh frame 3 in this embodiment are provided with 4 rows, that is, the shielding mesh frame 3 can be assembled with 4 signal contact modules 2, two first signal contact modules and two second signal contact modules are assembled on the shielding mesh frame 3, and the first signal contact modules and the second signal contact modules are arranged in a staggered manner. The staggered arrangement of the differential signal pairs of two adjacent signal contact modules 2 can reduce crosstalk between the differential signal pairs of adjacent signal contact modules 2. In other embodiments, the number of the shielding mesh frames may be adjusted as needed, for example, only one row is provided, and at this time, the electrical connector is correspondingly equipped with one signal contact module, or two rows, three rows, and the like are provided, and the electrical connector is correspondingly equipped with the signal contact modules corresponding to the number of the rows. In other embodiments, the shielding frame may only mount the first signal contact module, and the pair of ground jacks and the signal jacks on the shielding frame are only arranged in a staggered manner in the column direction, and the jacks on each row are both one of the ground jacks or the signal jacks.

The guide groove 311 extending along the plugging direction is formed in the hole wall of the grounding jack 31, the strip-shaped protruding structure 252 arranged on the grounding plugging end 25 can be inserted into the guide groove 311 to realize the electric connection of the grounding plugging end 25 and the shielding net frame 3, and the bottom wall of the U-shaped section 251 of the grounding plugging end 25, which is back to one side of the protruding structure 252, can be abutted against the hole wall of the grounding jack 31 after being plugged, so that the electric connection effect between the shielding net frame 3 and the grounding plugging end 25 is further enhanced. The signal jack 32 is a square hole, and two corresponding signal plug terminals 24 are inserted into the signal jack 32 and spaced from the hole wall of the signal jack 32 to prevent short circuit between the shielding mesh frame 3 and the signal contact member 22. After the grounding plug-in end 25 inserts the protruding structure 252 in the guide groove 311, except that the grounding plug-in end 25 can be electrically connected with the shielding mesh frame 3, the sheet body of the grounding plug-in end 25 can be limited, the fulcrum of the sheet body is changed, the sheet body can keep the corresponding position when being plugged, the holding force of the grounding plug-in end 25 is increased, and the plugging is more stable. In other embodiments, the grounding plug end may be provided with a resilient claw which is gradually close to the insulating substrate and is inclined outward, and the grounding plug end is electrically connected to the hole wall of the grounding jack through the resilient claw, and at this time, the grounding jack does not need to be provided with a guide groove. In other embodiments, the protruding structure on the ground plug end may also be a protrusion, and the protrusion is guided and engaged with the guide groove and electrically connected to the shielding mesh frame. In other embodiments, the grounding plug end may not be provided with a U-shaped section, but both sides of the sheet body extend outward to form a protruding structure, and two corresponding hole walls of the grounding plug hole are provided with guide grooves.

As shown in fig. 7, in order to enhance the electrical connection effect between the shielding plate 23 and the shielding mesh frame 3 and limit the insertion of the signal contact module 2 into the shielding mesh frame 3, an abutting structure for abutting against the shielding mesh frame 3 is provided at a position on the shielding plate 23 corresponding to the signal insertion end 24 in this embodiment. The abutting structure is an abutting elastic sheet 231 formed by the shielding sheet 23 turning outwards, and the abutting elastic sheet 231 corresponds to the signal inserting end 24, so that the abutting elastic sheet 231 is resisted with the hole opening of the signal inserting hole 32 after the signal contact module 2 is inserted into the shielding net frame 3, and the electric contact performance of the shielding sheet 23 and the shielding net frame 3 can be enhanced while the signal contact module 2 is limited in the inserting direction. Because the abutting elastic sheets 231 have certain elasticity, all the abutting elastic sheets 231 can be ensured to be reliably contacted with the shielding screen frame 3 through the elastic deformation of the abutting elastic sheets 231 during plugging. In other embodiments, the abutting structure may also be a protrusion protruding outward on the shielding plate, and the protrusion abuts with the shielding mesh frame at the aperture of the signal jack. In other embodiments, the abutting elastic sheet may not be provided, and the shielding sheet is only electrically contacted with the shielding mesh frame through the grounding plug end.

As shown in fig. 8 and 9, the signal contact module 2 and the shielding mesh frame 3 are assembled in the housing 1 of the electrical connector and then fixed by the cover plate 4. The apron 4 is including stretching into between the adjacent signal contact module 2 or being located the cardboard 41 in the signal contact module 2 outside, and the one end that shielding screen frame 3 was kept away from to cardboard 41 links together through tie-beam 42, still is provided with buckle 43 on the cardboard 41, and apron 4 is fixed through buckle 43 and casing 1.

As shown in fig. 1, in the electrical connector in this embodiment, shielding buckle plates are further disposed at the signal pins 26 and the ground pins 27, an avoiding channel through which the signal pins 26 and the ground pins 27 pass is disposed on the shielding buckle plates, and protrusions are further disposed on the shielding buckle plates and face the shielding plate 23, and the protrusions are in interference fit with the signal contact module 2, so that the shielding structure is conducted. In other embodiments, the shielding pinch plate is not arranged, or the common pinch plates are arranged at the signal pin and the grounding pin, so that only the signal contact is protected.

Claims

1. An electrical connector, comprising:

a housing;

the signal contact module comprises an insulating substrate, and a differential signal pair and a shielding sheet which are arranged on the insulating substrate, wherein the differential signal pair is provided with a signal plugging end used for being plugged and matched with the adaptive connector, and the shielding sheet is provided with a grounding plugging end between the plugging ends of two adjacent differential signal pairs;

the shielding net frame is arranged on the shell, and the signal plugging end and the grounding plugging end of each differential signal pair penetrate through meshes of the shielding net frame;

the signal plug-in end is spaced apart with the pore wall that corresponds the mesh, ground connection plug-in end and the pore wall electric contact that corresponds the mesh, ground connection plug-in end is the clip formula plug-in end, be equipped with the guide slot on the pore wall of the mesh that supplies ground connection plug-in end to pass, the two lamellar bodies of clip formula plug-in end are equipped with the bulge structure that extends along lamellar body width direction in the position of keeping away from the interface, when ground connection plug-in end passes corresponding the mesh, bulge structure cartridge is in corresponding the guide slot, realize ground connection plug-in end and shielding net frame's electricity and be connected, the position department that corresponds with bulge structure on the overhang direction of clip formula plug-in end, two lamellar bodies of clip formula contact jaw are in one side body coupling of bulge structure dorsad and form the U-shaped section, the clip formula contact jaw meets with one side pore wall of.

2. An electrical connector as in claim 1 wherein the projecting structure is in the form of a strip extending in the direction of overhang of the corresponding blade.

3. The electrical connector as claimed in claim 1 or 2, wherein the shield plate covers the differential signal pair in the insulating substrate from one side in a thickness direction of the insulating substrate, and the shield plate is provided with an abutting structure at a position corresponding to the signal insertion end, the abutting structure being for electrical contact with the shield mesh frame.

4. The electrical connector of claim 3, wherein the abutting structure is an abutting elastic piece which is cantilevered to one side of the shielding piece, and the abutting elastic piece is elastically abutted with the side surface of the shielding net frame.

5. The electrical connector as claimed in claim 1 or 2, wherein there are two of the shielding plates, and the two shielding plates are respectively mounted on two side surfaces of the insulating substrate, the two signal contacts of the differential signal pairs are arranged at intervals in the plate thickness direction, the two shielding plates are respectively provided with the ground mating terminals between two adjacent differential signal pairs, and the two ground mating terminals between two adjacent differential signal pairs respectively correspond to the two signal mating terminals of the differential signal pairs.

6. The electrical connector of claim 1 or 2, wherein there are more than two signal contact modules, and the signal contact modules are arranged side by side in the thickness direction of the insulating substrate, and the differential signal pairs of two adjacent signal contact modules are arranged in a staggered manner.

7. The electrical connector of claim 1 or 2, wherein the differential signal pairs have signal pins for connection to a printed circuit board, the shield plate has a ground pin between the signal pins of two adjacent differential signal pairs, the connector further comprises a shield pinch plate fixedly connected to the housing, the shield pinch plate is provided with a relief channel for the signal pins and the ground pin to pass through, and the shield pinch plate is in electrical contact with the shield plate.