CN110350349B - Plug connectors for differential data transmission - Google Patents

Abstract

A plug connector for differential data transmission, comprising a plug connector and a socket connector, the plug connector includes a plug tail sleeve installed in a plug housing and a plug insulator installed in the plug tail sleeve, the plug The insulator has a plurality of axially arranged protrusions along the circumferential direction, the same side of each protrusion is provided with plug-type contacts arranged in parallel, and the plug-type contacts located on the sides of adjacent protrusions are arranged perpendicular to each other; The socket connector includes a socket tail sleeve installed in the socket shell and a socket insulator installed in the socket tail sleeve. The socket insulator is provided with a cavity that is inserted and matched with the plug insulator. The contact pieces correspond to each other and push and fit each other to realize electrical connection of socket chip contact pieces. The invention can adapt to the development trend of product miniaturization through reasonable spatial distribution of the contact pieces, and can effectively eliminate the short pile effect and signal crosstalk during high-frequency signal transmission.

Description

Plug connectors for differential data transmission

technical field

The invention belongs to the field of differential connectors, in particular to a plug connector for differential data transmission.

Background technique

The differential connector is mainly used for high-speed data signal transmission. The existing M12 differential connector is shown in Figure 1. It adopts a cross shield structure 7 to divide the eight round pin/round hole contacts into four differential pairs. The cross shield structure Conduction with the housing shield plays a shielding role to achieve high-speed performance transmission. With the development of miniaturization of such connector products, this structure cannot be applied to products with smaller external dimensions, mainly because the cross-shielded structural parts are more demanding on the processing technology, and cannot be made small due to the limitation of volume and minimum wall thickness. ; If the wall of the part of the cross shielding structure is too thin, it will not only fail to meet the processing requirements of the part, but also be easily damaged during the insertion process.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a plug connector for differential data transmission, which can adapt to the development trend of product miniaturization through reasonable spatial distribution of contacts, and can effectively eliminate the short pile effect during high-frequency signal transmission. and signal crosstalk.

The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. A plug connector for differential data transmission proposed according to the present invention includes a plug connector and a socket connector, and is characterized in that: the plug connector includes a plug tail sleeve installed in the plug housing and The plug insulator in the plug tail sleeve and protruding from the top of the plug tail sleeve, the plug insulator has a plurality of axially arranged protrusions along the circumferential direction, and the same side of each protrusion is provided with a plug blade type arranged in parallel Contact pieces, and the plug-type contact pieces located on the sides of adjacent protrusions are arranged perpendicular to each other;

The socket connector includes a socket tail sleeve installed in the socket housing and a socket insulator installed in the socket tail sleeve and protruding from the top of the socket tail sleeve. The socket insulator is provided with a plug insulator that is inserted into the socket insulator. The cavity is provided with socket blade contacts which are in one-to-one correspondence with the plug blade contacts and push each other to achieve electrical connection.

The purpose of the present invention is further achieved by adopting the following technical measures.

In the aforementioned plug connector, two plug blade contacts are arranged on the same side of each protrusion in parallel to form a differential pair.

In the aforementioned plug connector, the protruding sidewall of the plug insulator is provided with a first escape groove for accommodating the corresponding plug blade contact when the plug blade contact elastically deforms in the up-down direction.

In the aforementioned plug connector, the cavity side wall of the socket insulator is provided with a second escape groove for accommodating the corresponding socket blade contact when the socket blade contact is elastically deformed in the up-down direction.

In the aforementioned plug connector, at least one protrusion of the plug insulator has a guide positioning surface that plays a positioning role when it is plugged and matched with the socket insulator.

The above-mentioned plug connector, wherein the plug blade contact piece has a fixed section for being fixedly connected with the plug insulator and an overhang section located on the side of the protrusion connected in sequence from the tail to the head, and the overhang section The front end of the socket is bent to form a bending section; the socket blade contact has the same structure as the plug blade contact.

The aforementioned plug connector, wherein the plug blade contact is fixedly assembled in the plug insulator by the first insert.

The aforementioned plug connector, wherein the receptacle blade contact is fixedly assembled in the receptacle insulator through the second insert.

With the above technical solutions, compared with the cross shield structure adopted in the prior art, the present invention has fewer parts, a simpler structure, and is not easily damaged during repeated insertion and connection. Since the traditional pin/jack contact is replaced by a chip differential contact, and this chip contact has a front and rear double contact structure, it can effectively eliminate the short pile effect during high-frequency signal transmission, and greatly improve the Signal quality. In addition, since the adjacent differential pairs arranged in the circumferential direction at the plug end of the plug/socket connector are perpendicular to each other and are isolated from each other by the protrusions of the plug insulator, it not only saves space, but also effectively improves the difference between the differential pairs. Signal crosstalk.

The above description is only an overview of the technical solution of the present invention, in order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand , the following specific preferred embodiments, and in conjunction with the accompanying drawings, are described in detail as follows.

Description of drawings

FIG. 1 is a schematic diagram of a differential pair structure of a differential connector in the prior art.

FIG. 2 is a schematic three-dimensional structure diagram of the plug connector in the present invention.

FIG. 3 is a schematic top view of the structure of FIG. 2 .

FIG. 4 is a schematic three-dimensional structure diagram of the socket connector in the present invention.

FIG. 5 is a schematic top view of the structure of FIG. 4 .

FIG. 6 is a schematic diagram of the positional relationship between the plug blade contact and the socket blade contact in a plugged state according to the present invention.

FIG. 7 is a schematic diagram of the plug connector and the socket connector in the mating state of the present invention.

FIG. 8 is a schematic diagram of the assembly of the plug blade contact and the plug insulator in the present invention.

FIG. 9 is a schematic diagram of the assembly of the socket chip contact and the socket insulator in the present invention.

FIG. 10 is a schematic diagram of the arrangement of the contact points of the plug blade contacts and the socket blade contacts in the present invention.

Detailed ways

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

A specific embodiment of a plug connector for differential data transmission proposed by the present invention: as shown in FIG. 2 to FIG. 7 , it includes a plug connector and a socket connector that are used together, and the plug connector includes a plug connector mounted on a plug shell. The plug tail sleeve 12 in the body 11 and the plug insulator 13 installed in the plug tail sleeve 12 and protruding from the top of the plug tail sleeve, the plug insulator 13 has four axially arranged protrusions 131 in the circumferential direction, so that The entire plug insulator is shaped like a windmill, the adjacent protrusions in the circumferential direction are perpendicular to each other, the same side of each protrusion 131 is provided with the plug blade contacts 3 arranged side by side, and each adjacent two protrusions in the circumferential direction are provided on the same side The plug blade contacts 3 are perpendicular to each other; as an example, in this embodiment, two plug blade contacts 3 are arranged side by side on the same side of each protrusion 131 to form a differential pair, of course, in other embodiments , it is also possible to set a larger number of plug blade contacts to form more differential pairs according to the size of the connector or the required data transmission speed.

The socket connector includes a socket tail sleeve 22 installed in the socket housing 21 and a socket insulator 23 installed in the socket tail sleeve 22 and protruding from the top of the socket tail sleeve, and the socket insulator 23 is provided with the aforementioned plug. The insulator 13 is adapted in shape and can be plugged and slidably matched with a cavity 231. The cavity 231 is provided with a one-to-one correspondence with the above-mentioned plug blade contacts 3 and push-fit with each other to achieve electrical connection and data transmission. Socket blade contacts 4. Referring to FIG. 3 , the shape of the cavity 231 is also in the shape of a windmill, and the differential pair formed by every two parallel socket contact pieces 4 is located at the inner wall in the axial direction of the cavity, and the differential pair adjacent to the circumferential direction arranged perpendicular to each other. After the plug connector and the socket connector are plugged together, four mutually spaced apart and adjacent vertical holes are formed between the plug insulator and the socket insulator to provide space for the push fitting of the contacts.

Preferably, the tail ends of the plug blade contacts 3 and the socket blade contacts 4 are embedded and fixed in the plug insulator or the socket insulator. Of course, conventional fixing methods such as bonding and forced mounting can also be used. Further, after each contact piece is fixedly installed, the connection between the tail end of each contact piece and the wire can be soldered, or the electrical connection can be realized by soldering on a printed circuit board. Referring to FIG. 7 , the manner in which the plug housing 11 and the socket housing 21 are connected may be conventional screw connection, snap fit, etc., which is not limited in the present invention.

With reference to FIG. 8 , the preferred technical solution in which the plug blade contact is fixed in the plug insulator by inlaid installation is further described: the plug insulator and the socket tail sleeve in this embodiment are integrally formed. Of course, the two can also be The first insert 33 is fixedly assembled in the plug insulator 13, and the first insert and the plug tail sleeve are further limited by steps to prevent axial movement. The plug blade contacts 3 are fixed in the first insert. Similarly, with reference to FIG. 9 , the socket insulator and the socket tail sleeve in this embodiment are integrally formed. Of course, the two can also be integrated by means of bonding, snap connection, etc.; the second insert 43 is fixedly assembled on the The socket insulator is inside the socket insulator and the two are matched to realize the axial limit through the step, and the socket chip contact piece 4 is fixedly assembled in the second insert piece 43 . It is worth noting that the assembling method of the plug blade contact piece 3 or the socket blade contact piece 4 and its corresponding fixed inserts may be bonding, forced fitting, etc., but this is not limited in the present invention. In addition, the plug/socket tail sleeve, the first insert and the second insert are all insulator structures made of insulating materials.

In this embodiment, on the one hand, the plug tail sleeve/socket tail sleeve is used to fix the plug/socket insulator in the respective connector housings; on the other hand, the plug tail sleeve and the socket tail sleeve The corresponding abutting end faces of the two cylinders can play the role of indicating the position of the plug in place in the process of plugging the plug and the socket connector.

In order to ensure that the plug blade contact piece 3 and the socket blade contact piece 4 will not interfere with each other when they are deformed during the plug-in process, resulting in failure to be plugged into place, a side wall of the protrusion 131 of each plug insulator 13 is provided for plugging the plug insulator 13. When the blade contacts 3 are elastically deformed in the up and down direction, they accommodate the first escape grooves 5 of the corresponding plug blade contacts, and each first escape groove 5 corresponds to the plug blade contacts 3 one-to-one; The side wall of the cavity 231 of the insulator 23 is provided with a second avoidance groove 6 for accommodating the corresponding socket chip contact when the socket chip contact 4 is elastically deformed in the up-down direction, and each second avoidance groove 6 and each The socket chip contacts 4 are in one-to-one correspondence. When the plug blade contact piece 3 and the socket blade contact piece 4 are pressed and deformed against each other, they can enter the corresponding escape grooves.

In order to accurately and conveniently align the plug connector with the socket connector and mate with each other, one of the protrusions of the plug insulator is provided with a guide positioning surface 1311; The guide positioning surface corresponds to and can be slidably fitted to the guide positioning surface 2311 .

Referring to FIG. 6 , the socket blade contact 3 has the same shape and structure as the plug blade contact 4 , wherein the plug blade contact 3 has a connecting and fixing section 31 and an overhanging section 32 in sequence from the tail to the head, and The front end of the overhanging section 32 is bent in two directions in turn to form a bent section 322 . The fixed section 31 is used for fixing with the plug insulator 13, and the two can be fixed by bonding or by being embedded and fixed by inserts, which is not limited in the present invention; the overhanging section 32 is located on the protrusion 131 The bending section 322 is formed by bending the front end of the overhang section 32 downward first and then upward bending, and the free state is located at the notch of the first escape groove. When the plug connector and the socket connector are plugged and mated, the overhanging section 32 belonging to the plug connector is used to push against the matching overhanging section belonging to the socket connector in the up-down direction and interact with the matching overhanging section Elastic deformation of the same magnitude, and the design of the bending section 322 is to facilitate the push-fit of the plug blade contact piece and the socket blade contact piece in the up-down direction and elastic deformation occurs. After the plug connector and the socket connector are inserted into place, the contacts of the two have a centrally symmetrical structure to form a mating state as shown in FIG. 6 , in which the bent section 322 of the plug blade contact is in contact with the socket blade The overhanging section 41 of the plug contact is in conductive contact, and the overhanging section 32 of the plug blade contact is in conductive contact with the bent section 42 of the socket blade contact, realizing stable contact between the two conductive contact points. By virtue of the structural design of the contact piece, the short pile effect during high-frequency signal transmission can be effectively eliminated, and the signal quality is greatly improved.

In this embodiment, after the plug and socket are plugged, the schematic diagram of the contact distribution of the plug blade contacts and the socket blade contacts is shown in Figure 10. A single differential pair transmits 2.5Gbps signals, and the four differential pairs have a total of Transmit 10Gbps signals. Since each pair of differential pairs in the present invention is separated by a plug insulator and is vertically designed, the volume of the connector can be designed to be smaller, which not only saves space, but also effectively improves signal crosstalk.

The above are only the preferred embodiments of the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make any simple modifications to the above embodiments according to the technical essence of the present invention, Equivalent changes and modifications still fall within the scope of the technical solutions of the present invention.

Claims (7)

1. A plug connector for differential data transmission, including plug connector, socket connector, characterized by: the plug connector comprises a plug tail sleeve arranged in a plug shell and a plug insulator which is arranged in the plug tail sleeve and protrudes out of the top of the plug tail sleeve, the plug insulator is provided with a plurality of axially arranged bulges along the circumferential direction, the same side of each bulge is provided with plug sheet type contact elements which are arranged in parallel, and the plug sheet type contact elements positioned on the same side part of the adjacent bulges are mutually and vertically arranged; the convex side wall of the plug insulator is provided with a first avoidance groove for accommodating the corresponding plug sheet type contact element when the plug sheet type contact element is elastically deformed in the vertical direction;

the socket connector comprises a socket tail sleeve arranged in a socket shell and a socket insulator arranged in the socket tail sleeve and protruding out of the top of the socket tail sleeve, a cavity body in plug-in fit with the plug insulator is formed in the socket insulator, and socket sheet type contact elements which correspond to the plug sheet type contact elements one to one and are mutually pushed and matched to realize electric connection are arranged in the cavity body.

2. The plug connector for differential data transmission according to claim 1, characterized in that: two plug sheet type contact pieces are arranged on the same side of each protrusion in parallel to form a differential pair.

3. The plug connector for differential data transmission according to claim 1, characterized in that: and a second avoiding groove for accommodating the corresponding socket sheet type contact element when the socket sheet type contact element is elastically deformed in the vertical direction is formed in the side wall of the cavity of the socket insulator.

4. A plug connector for differential data transmission according to any one of claims 1 to 3, characterized in that: at least one protrusion of the plug insulator is provided with a guiding and positioning surface which plays a positioning role when the protrusion is in plug-in fit with the socket insulator.

5. The plug connector for differential data transmission according to claim 1, characterized in that: the plug sheet type contact element is provided with a fixed section and an overhanging section positioned on the side part of the bulge, which are sequentially connected from the tail part to the head part and are used for being fixedly connected with the plug insulator, and the front end of the overhanging section is bent to form a bending section; the socket sheet type contact element and the plug sheet type contact element have the same structure.

6. The plug connector for differential data transmission according to claim 1, characterized in that: the plug sheet type contact element is fixedly assembled in the plug insulator through the first insert.

7. The plug connector for differential data transmission according to claim 1, characterized in that: and the socket sheet type contact element is fixedly assembled in the socket insulator through the second insert.

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