CN110212374B

CN110212374B - Plug connector

Info

Publication number: CN110212374B
Application number: CN201811455445.3A
Authority: CN
Inventors: 王炎; 李冉; 谢亚军
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2020-10-27
Anticipated expiration: 2038-11-30
Also published as: CN110212374A

Abstract

The invention relates to the field of conductive connection and provides a plug connector. The plug connector comprises a plate-shaped insulator, wherein a signal contact and a grounding contact are respectively installed on the two side plate surfaces of the plate-shaped insulator, a shielding plate installation groove is formed in the plate-shaped insulator, a shielding plate is installed in the shielding plate installation groove, the groove length of the shielding plate installation groove extends in the length direction of the plate-shaped insulator, the groove depth extends in the thickness direction of the plate-shaped insulator, and the shielding plate comprises a main plate body extending in the groove length direction and contact structures which are arranged on the two sides of the main plate body in the width direction and are respectively used for being in electric contact with the grounding contacts on the two side surfaces of. The plug connector of the invention electrically conducts each grounding contact element on the same side of the plate-shaped insulator and each grounding contact element on different sides through the shielding plate, thereby achieving the full shielding of the signal contact element, greatly reducing the crosstalk and ensuring the signal transmission quality.

Description

Plug connector

Technical Field

The invention relates to the field of conductive connection, in particular to a plug connector matched with a card edge connector.

Background

With the development of communication information technology, high-speed connectors for transmitting signals are increasingly used, such as plug connectors adapted to card edge connectors, which include a large number of signal contacts densely arranged for transmitting high-density and high-transmission-rate electrical signals.

For example, the invention is a plug connector for plugging with a card edge connector, which is disclosed in the chinese patent with the publication number CN100570957C and the name of the invention is extension of a circuit board connector. The connector comprises a plate-shaped insulator, wherein a large number of contact elements are fixedly arranged on two side surfaces of the plate-shaped insulator respectively, one end of one side of each contact element penetrates through the plate-shaped insulator, and the contact elements and the other side of the contact elements are connected with a printed board together. The contact comprises signal contacts and grounding contacts, every two adjacent signal contacts form a pair of differential pairs, and the grounding contacts are clamped between every two adjacent differential pairs so as to realize shielding between the differential pairs. However, the plug connector only achieves shielding between two adjacent differential pairs on one side, the signal contact piece has no complete shielding effect in the thickness direction of the plate-shaped insulator, and certain signal crosstalk still exists under the condition that the transmitted electric signals are dense, so that the signal transmission of the connector is influenced.

Disclosure of Invention

The invention aims to provide a plug connector with good shielding effect and high signal transmission quality.

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

the plug connector comprises a plate-shaped insulator, wherein a signal contact and a grounding contact are respectively installed on two side plate surfaces of the plate-shaped insulator, the signal contact and the grounding contact extend in the width direction of the plate-shaped insulator and are arranged side by side in the length direction of the plate-shaped insulator, a shielding plate installation groove is formed in the plate-shaped insulator, a shielding plate is installed in the shielding plate installation groove, the length of the shielding plate installation groove extends in the length direction of the plate-shaped insulator, the depth of the shielding plate installation groove extends in the thickness direction of the plate-shaped insulator, and the shielding plate comprises a main plate body extending in the length direction of the shielding plate and contact structures which are arranged on two sides of the main plate body in the width direction and are respectively.

According to the plug connector, the grounding contact pieces on the same side of the plate-shaped insulator and the grounding contact pieces on different sides are electrically conducted through the shielding plate, so that the same potential of all the grounding contact pieces is ensured, the shielding between the signal contact pieces on two sides of the plate-shaped insulator is realized, the full shielding of the signal contact pieces is realized, the crosstalk is greatly reduced, and the signal transmission quality is ensured.

Furthermore, a plurality of clamping grooves are respectively formed in two sides of the main plate body at intervals in the length direction, each clamping groove corresponds to each grounding contact element respectively, so that each grounding contact element is connected with the clamping groove in a clamping mode, and the groove walls of the clamping grooves form the contact structure. Through setting up the draw-in groove, can make shield plate and ground connection contact mutual joint realize preliminary location when the assembly, the installation of being convenient for has also guaranteed the reliability of contact and fixing between shield plate and the ground connection contact.

Furthermore, the groove wall of each clamping groove protrudes out of the main board body, the grounding contact pieces on two sides of the plate-shaped insulator correspond to each other in the thickness direction of the plate-shaped insulator, and the openings of the two clamping grooves on two sides of the main board body, which correspond to each other in the thickness direction of the plate-shaped insulator, are opposite to each other to form a clamping groove pair with an H-shaped structure. The structure is regular, and design, manufacture and assembly are facilitated.

In addition, an avoiding groove for the signal contact element to pass through is formed between the main plate body and the adjacent groove walls of the two adjacent clamping grooves on the same side, a stop block which is used for stopping and matching with the groove bottom of the clamping groove on one side of the shielding plate and/or the groove bottom of the avoiding groove after the shielding plate is installed is arranged in the mounting groove of the shielding plate on the plate-shaped insulator, and the stop block is matched with the grounding contact element on the other side of the shielding plate to fix the clamping shielding plate. Through the fixing of the stop block and the grounding contact piece to the shielding plate, other fixing structures are not needed to be arranged, the structure of the connector is simplified, and the miniaturization of the connector is also realized.

Further, the tank bottom of the avoiding groove is provided with the stop block, the stop block covers the differential pair corresponding to the avoiding groove in the length direction of the connector, and the main board body part connecting the two adjacent clamping groove pairs is close to one side of the stop block in the thickness direction of the plate-shaped insulator. The stop block is arranged between the shielding plate and the signal contact element, so that the shielding effect between the shielding plate and the signal contact element is improved, the main plate body part connecting two adjacent clamping groove pairs is close to one side of the stop block in the thickness direction of the plate-shaped insulator, the shielding effect between the shielding plate and the signal contact element on two sides of the plate-shaped insulator can be approximately equivalent, and the shielding effect of the whole connector is ensured.

Both side surfaces of the plate-shaped insulator are provided with grooves extending in the width direction, a plurality of grooves are arranged in parallel in the length direction of the plate-shaped insulator, and the signal contact pieces and the grounding contact pieces are installed in the grooves. The installation and the positioning of the contact piece are convenient.

Drawings

Fig. 1 is a schematic structural view of a plug connector of the present invention;

fig. 2 is an exploded perspective view showing a plate-like insulator of the plug connector and contacts on both sides thereof;

FIG. 3 is a partial structural view of a shield plate;

fig. 4 is a schematic view showing a structure in which a shield plate is mounted in a plate-shaped insulator;

description of reference numerals: 1-plate-like insulator; 10-a plug end; 11-a first stop; 12-a second stop; 14-shield plate mounting slots; 2-a contact member; 20-a signal contact; 200-differential pair; 21-a ground contact; 23-a connection end; 3-a shielding plate; 30-a main board body; 31-avoidance groove; 32-card slot.

Detailed Description

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

Embodiments of the plug connector of the present invention: as shown in fig. 1-2, the plate-shaped insulator 1 is provided with contact mounting grooves on both sides of the plate-shaped insulator 1, and contacts 2 are mounted through the contact mounting grooves, and the contacts 2 include signal contacts 20 and ground contacts 21. The contact mounting grooves extend in the width direction of the plate-like insulator 1 and are arranged in the longitudinal direction of the plate-like insulator 1. The contact mounting grooves have different lengths, and a part of the contact mounting grooves is used for mounting the grounding contact 21, and the other part of the contact mounting grooves is used for mounting the signal contact 20. The contacts 2 on both sides of the plate-like insulator 1 form a mating end 10 for mating with an adapter connector at one edge in the width direction of the plate-like insulator 1.

The contact 2 on one side of the plate-shaped insulator 1 penetrates through the plate-shaped insulator 1 through a bending section vertical to the plate surface of the plate-shaped insulator 1, the contact on the other side also has a bending section vertical to the plate surface of the plate-shaped insulator 1, and the bending sections of the contact 2 on the two sides form a connecting end 23 for connecting with a printed board.

The contact elements on both sides of the plate-shaped insulator 1 are arranged in the same manner, and a grounding contact element is clamped between every two signal contact elements, and two adjacent signal contact elements form a differential pair. The ground contact 21 between two differential pairs shields the adjacent two differential pairs in the parallel direction.

The plate-like insulator 1 is further provided with a shield plate installation groove 14, and the shield plate 3 is installed in the shield plate installation groove 14. Wherein the length of the shield plate mounting groove 14 extends in the length direction of the plate-like insulator 1 and the depth extends in the thickness direction of the plate-like insulator 1. Accordingly, the shield plate 3 has a structure as shown in fig. 2 to 3, and includes a main plate body 30 having a length extending in a longitudinal direction of the plate-like insulator 1, and when the shield plate 3 is mounted in the shield plate mounting groove 14, a width direction of the main plate body 30 is kept coincident with a groove depth direction of the shield plate mounting groove 14.

The shielding plate 3 is provided with a contact structure electrically contacting with the grounding contacts 21 on both sides of the plate-shaped insulator 1, so that the grounding contacts 21 are conducted with each other, thereby realizing full shielding of the signal contacts 20, improving shielding effect and further reducing crosstalk of the connector. In this embodiment, as shown in fig. 3, the main board body 30 of the shielding plate 3 is a long strip structure, two sides of the main board body 30 are provided with U-shaped slots 32 with opposite openings, and the sheet body of each grounding contact 21 can be just clamped into the U-shaped slot 32 corresponding to the grounding contact, and is tightly clamped with the slot wall of the slot 32 to realize the electrical contact with the shielding plate 3, that is, the contact structure in this embodiment is the slot wall of the U-shaped slot 32. In this embodiment, the signal contacts 20 on both sides of the plate-shaped insulator 1 correspond to each other in the thickness direction of the plate-shaped insulator 1, and therefore, the U-shaped notches 32 on both sides of the main plate body also correspond to each other in the thickness direction of the plate-shaped insulator 1, and the two corresponding notches 32 form a pair of notches, forming an H-shaped structure. Furthermore, an avoidance groove 31 for the same differential pair to pass through is formed between the main plate 30 and the adjacent groove walls of the two adjacent card slots 32 on the same side.

As shown in fig. 4, when the shielding plate 3 is installed in the shielding plate installation groove 14, the grounding contacts 21 on both sides of the plate-shaped insulator 1 are just clamped into the slots 32 and tightly fit with the walls of the slots 32 to ensure electrical conduction, and the differential pair 200 formed by the two signal contacts 20 between two adjacent grounding contacts 21 passes through the relief groove 31.

In order to conveniently realize the fixed installation of the shielding plate 3, a first stop 11 and a second stop 12 are respectively arranged in the shielding plate installation groove 14 corresponding to the avoiding groove 31 and the clamping groove 32, and the first stop 11 and the second stop 12 are both connected with the two side groove walls of the shielding plate installation groove 14. In this way, the shield plate 3 can be fixed in the thickness direction of the plate-like insulator 1 only by the first and second stoppers and the ground contact 21 on the stopper side. Especially after the grounding contact 21 is fixedly mounted in the contact mounting groove, the shielding plate 3 may even be fixed without further structures. Of course, it is not excluded to provide other parts, such as a bead, on the plate-shaped insulator to block the side of the shield plate facing away from the stop block, or to directly injection mold the shield plate in the shield plate mounting groove, in order to avoid the ground contact from being subjected to too much force.

As can be seen from fig. 4, the first stopper 11 covers the differential pair 200 corresponding to the avoiding groove 31 in the length direction of the connector, so that the insulation shielding between the main board body 30 of the shielding board 3 and the differential pair 200 on the other side (i.e., the lower side in the figure) of the first stopper 11 can also be ensured, and then, in order to ensure the uniformity of the shielding effect between the shielding board 3 and the differential pairs on the two sides, the position of the main board body 30 in the height direction of the H-shaped structure is offset. As can be seen from fig. 3 and 4, the distance H between the main board body 30 and the groove edge of the one side card slot 32 is greater than the distance H between the groove edges of the other side card slot 32, it can also be understood that the depth of the one side avoiding groove 31 on the shielding board 3 is less than the depth of the other side avoiding groove 31, and when the shielding board 3 is installed in the shielding board installation groove 14, the first stopper 11 is located in the avoiding groove with the smaller depth.

In addition, the contact 2 may be fixed in the contact mounting groove by injection molding, or in other embodiments, insulating protrusions may be respectively provided on both side groove edges of the contact mounting groove, and after the contact is mounted in the contact mounting groove, the contact may be sealed in the contact mounting groove by heat-fusing the protrusions.

According to the plug connector, the shielding plates for conducting the grounding contact pieces are arranged between the contact pieces on the two sides of the plate-shaped insulator, so that the signal contact pieces are completely shielded, the crosstalk problem of the connector is solved, and the signal transmission quality is further improved.

Of course, the connector of the present invention is not limited to the above-described embodiment. For example, in another embodiment, two sides of the elongated main plate body may be respectively provided with an extension section extending along the thickness direction of the plate-shaped insulator, the extension section is provided with a slot opening toward the length direction of the plate-shaped insulator, and the ground contact is inserted into the slot and contacts with the slot through two sides. Or the shielding plate is provided with an elastic sheet corresponding to each grounding contact element in an overhanging manner and is abutted against the grounding contact elements through the elastic sheets.

Or in other embodiments, only the first stopper or only the second stopper may be provided to stop the shielding plate, or the first stopper may not cover the corresponding differential pair in the length direction of the connector, and at this time, because the effect of the stopper on the insulation shielding between the differential pair and the main board body is limited, the distance from the main board body to the groove edges of the card slots on both sides is equal.

In still another embodiment, two or more shield plate mounting grooves may be formed in the plate-shaped insulator in the extending direction of the contact, and the shield plates may be mounted therein to achieve conduction between the ground shields at a plurality of positions. Or the number of the shielding plates arranged in the same shielding plate mounting groove is two or more, and the shielding plates are continuously connected in the length direction of the plate-shaped insulator, so that the conduction between the grounding contact pieces is realized.

Claims

1. A plug connector comprises a plate-shaped insulator, wherein a signal contact piece and a ground contact piece are respectively arranged on two side plate surfaces of the plate-shaped insulator, the signal contact piece and the ground contact piece extend in the width direction of the plate-shaped insulator and are arranged side by side in the length direction of the plate-shaped insulator, the plug connector is characterized in that a shielding plate mounting groove is arranged on the plate-shaped insulator, a shielding plate is mounted in the shielding plate mounting groove, the length of the shielding plate mounting groove extends in the length direction of the plate-shaped insulator, the depth of the shielding plate extends in the thickness direction of the plate-shaped insulator, the shielding plate comprises a main plate body extending along the length direction of the shielding plate body and contact structures arranged on two sides in the width direction of the main plate body and used for being electrically contacted with the ground contact pieces on two side surfaces of the plate-shaped insulator respectively, a plurality of clamping grooves are arranged on two sides of the, the groove walls of the clamping grooves form the contact structure, the groove walls of the clamping grooves protrude out of the main board body, the grounding contact elements on two sides of the board-shaped insulator correspond to each other in the thickness direction of the board-shaped insulator, the openings of the two clamping grooves on two sides of the main board body, which correspond to each other in the thickness direction of the board-shaped insulator, are opposite to each other to form a clamping groove pair in an H-shaped structure, an avoiding groove for the signal contact element to pass through is formed between the main board body and the adjacent groove walls of the two adjacent clamping grooves on the same side, a stop block which is used for stopping and matching with the groove bottom of the avoiding groove on one side of the shielding plate after the shielding plate is installed is arranged in the mounting, and the stop block covers the differential pair corresponding to the avoiding groove in the length direction of the connector, and the main board body part connecting the two adjacent clamping groove pairs is close to one side of the stop block in the thickness direction of the plate-shaped insulator.

2. The plug connector of claim 1, wherein the first stopper is a stopper engaged with the groove bottom stopper of the avoiding groove, the second stopper for engaging with the groove bottom stopper of the card groove on one side of the shield plate after the shield plate is fitted into the shield plate fitting groove is provided in the plate-like insulator, and the first stopper and the second stopper are engaged with the ground contact on the other side of the shield plate to fix the shield plate.

3. The plug connector as recited in claim 1, wherein both side surfaces of the plate-like insulator are provided with a plurality of grooves extending in a width direction and arranged side by side in a longitudinal direction of the plate-like insulator, and the signal contacts and the ground contacts are mounted in the grooves.