CN114649705B

CN114649705B - High speed connector

Info

Publication number: CN114649705B
Application number: CN202210538438.XA
Authority: CN
Inventors: 蔡友华; 林海燕; 彭龙强
Original assignee: Xing Wan Lian Electronics Co ltd
Current assignee: Xing Wan Lian Electronics Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-08-09
Anticipated expiration: 2042-05-18
Also published as: CN114649705A

Abstract

The invention provides a high-speed connector, which comprises a base and a plurality of metal terminals, wherein the base is used for splicing a butt joint card with a conductive gasket on the surface, the metal terminals are arranged in the base, each metal terminal comprises a contact part, an elastic arm, a fixing part and a welding part which are sequentially connected from top to bottom, the width of the elastic arm is equal to the width of the conductive gasket or is approximately equal within the range of manufacturing precision tolerance +/-0.05 mm, an upper section part of the elastic arm connected with the contact part forms an included angle smaller than 5 degrees with the insertion direction of the butt joint card when the butt joint card is not inserted into the base, and is parallel to the insertion direction of the butt joint card when the butt joint card is inserted into the base or is approximately parallel within the range of manufacturing precision tolerance +/-3 degrees; the high-speed connector has the advantages that the characteristic impedance fluctuation of the signal terminal can be reduced, the signal transmission loss is reduced, and the signal integrity performance of the connector is greatly improved.

Description

High speed connector

Technical Field

The invention belongs to the field of connectors, and particularly relates to a high-speed connector, in particular to a plug-in card type connector.

Background

The transmission speed required by electronic and IT products is faster and faster, and the products need to be compatible with the specifications of the old version while being updated. For example, the physical interface standards of PCIE 4.0 and PCIE 5.0 are not changed in a PCIE slot connector, and what is changed is that the transmission speed of PCIE 5.0 is directly increased by one time, so that the connector design has higher requirements to meet the increase of the transmission speed.

Chinese patent CN 111525347B discloses an electrical connector and a connector assembly, which improve the signal transmission rate by arranging signal terminals and ground terminals at unequal intervals, and although it can reduce the direct crosstalk of signals, the force arm width of the signal terminals is not equal to the width of the conductive pads on the mating element, and this design will cause the signal terminals to have characteristic impedance fluctuation, so that the signal transmission loss is large, and the signal integrity of the connector is reduced.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a high-speed connector, which can maintain low crosstalk between signal terminals, reduce characteristic impedance fluctuation of the signal terminals, reduce signal transmission loss, and greatly improve signal integrity of the connector.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a high-speed connector, its includes that the surface has the butt joint card of conductive gasket to peg graft the base and locate a plurality of metal terminals in the base, and each metal terminal includes from last contact site, elastic arm, holding portion and the welding part of connecting according to the preface extremely down, the width of elastic arm equals or near equals in the scope of manufacturing accuracy tolerance 0.05mm with the width of conductive gasket, and the upper segment portion that the elastic arm links to each other with the contact site is less than 5 contained angles with butt joint card direction of insertion when the butt joint card is located butt joint card not inserted in the base, is parallel with butt joint card direction of insertion or near parallel in the scope of manufacturing accuracy tolerance 3 when butt joint card inserts in the base.

Furthermore, the distance between the upper section part of the elastic arm and the conductive gasket is less than 0.20mm when the butt joint card is inserted into the base, and the lower end of the upper section part is flush with the lower end of the conductive gasket when the butt joint card is inserted into the base.

Furthermore, the elastic arm comprises a first force arm and a second force arm which are connected up and down, the first force arm vertically extends from the lower end of the contact part to form, the second force arm bends and extends from the lower end of the first force arm towards the direction far away from the insertion part and then vertically extends to form, the lower end of the second force arm is connected with the fixing part, the first force arm comprises a transition part which enables the width of the first force arm to be transited to the width of the contact part, the widths of the first force arm and the second force arm are equal to the width of the conductive gasket or are approximately equal within the manufacturing precision tolerance range of +/-0.05 mm, and the first force arm is the upper section of the elastic arm.

Furthermore, the fixing part comprises a first convex part, a first concave part, a second convex part, a second concave part and a third convex part which are sequentially connected from top to bottom, the upper end of the first convex part is connected with the lower end of the elastic arm, the lower end of the third convex part is connected with the welding part, the two sides of the third convex part in the width direction are provided with the material belt connecting part, a clamping point is protruded on the surface of one side of the second convex part in the thickness direction, and the central distance between the clamping point and the first convex part is equal to the central distance between the clamping point and the material belt connecting part.

Further, the width of the first concave portion is equal to the width of the second concave portion.

Furthermore, the metal terminal comprises a signal terminal and a ground terminal, the structure of the signal terminal is the same as that of the ground terminal, the upper end of the contact part is connected with the pressing part through the guide part, the contact part is overlapped with the vertical center line of the conductive gasket, the lower end of the fixing part is connected with the welding part through the extending part, and the welding part is an SMT (surface mount technology) type welding part or a DIP (dual in-line package) type welding part.

The utility model provides a high-speed connector, its includes that the surface has the base of butt joint card grafting of conductive gasket and locates a plurality of metal terminals in the base, and the pedestal mounting is on the PCB board, and each metal terminal includes from last to lower contact site, elastic arm, holding portion and the welding part of connecting according to the preface, the width of elastic arm equals or is close equal in the manufacturing accuracy tolerance +/-0.05 mm within range with conductive gasket, and the distance between the contact point of holding portion and elastic arm juncture and contact site equals the distance of holding portion and elastic arm juncture and PCB board surface.

Furthermore, the upper section part of the elastic arm connected with the contact part is positioned in an included angle of less than 5 degrees with the inserting direction of the butt joint card when the butt joint card is not inserted into the base, and is parallel to the inserting direction of the butt joint card when the butt joint card is inserted into the base or is approximately parallel to the inserting direction of the butt joint card within the manufacturing precision tolerance range of +/-3 degrees.

Compared with the prior art, the invention has the following beneficial effects: the width of the elastic arm is designed to be equal to the width of the conductive gasket, the upper section of the elastic arm is designed to form an included angle of less than 5 degrees with the insertion direction of the butt card when the butt card is not inserted into the base, to be parallel with the insertion direction of the butt card when the butt card is inserted into the base or to be approximately parallel within the manufacturing precision tolerance range of +/-3 degrees, the distance between the upper section of the elastic arm and the conductive gasket when the butt card is inserted into the base is less than 0.20mm, the lower end of the upper section is flush with the lower end of the conductive gasket when the butt card is inserted into the base, the central distance between the clamping point and the first convex part is equal to the central distance between the clamping point and the material belt connecting part, the width of the first concave part is equal to the width of the second concave part, the distance between the interface between the fixing part and the elastic arm and the contact point of the contact part is equal to the distance between the interface of the fixing part and the elastic arm and the surface of the PCB plate, so that the characteristic impedance fluctuation of the signal terminal is reduced, the loss of signal transmission is greatly reduced, so that the signal integrity of the electric connector is greatly improved; and the signal terminal and the grounding terminal are consistent in structure, and the production and the manufacture of products are finished without multiple sets of dies and multiple assembling, so that the manufacturing cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the high-speed connector of the present invention;

fig. 2 is a perspective view of a metal terminal;

FIG. 3 is a schematic front view of a metal terminal;

FIG. 4 is a side view of a metal terminal;

FIG. 5 is a schematic view of a metal terminal in contact with a docking card, showing only a partial docking card configuration;

FIG. 6 is a cross-sectional view of FIG. 1;

FIG. 7 is a schematic view of the docking card inserted into FIG. 6;

FIG. 8 is a schematic view of a plurality of metal terminals in contact with a mating card;

fig. 9 is a schematic diagram of a metal terminal of another embodiment of the high speed connector of the present invention.

Detailed Description

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

Example one

As shown in fig. 1 to 8, the present embodiment provides a high-speed connector including a base 1 and a plurality of metal terminals 2 provided in the base 1. The base 1 is provided with a central slot 11 for the insertion of a butt-joint card 3, the base 1 is installed on a PCB 4 (circuit board), the surfaces of two sides of the butt-joint card 3 are provided with conductive gaskets 31, and the metal terminals 2 are welded on the PCB 4 and are electrically contacted with the conductive gaskets 31, so that the butt-joint card 3 is electrically connected with the PCB 4.

The plurality of metal terminals 2 include a signal terminal and a ground terminal, and the structure of the signal terminal is the same as that of the ground terminal. Each metal terminal 2 comprises a contact part 21, an elastic arm 22, a holding part 23 and a welding part 24 which are sequentially connected from top to bottom, the upper end of the contact part 21 is connected with a pressing part 26 through a guide part 25, and the lower end of the holding part 23 is connected with the welding part 24 through an extension part 27. The contact portion 21 is in electrical contact with the conductive pad 31. The soldering portion 24 is an SMT type soldering portion (flat type soldering portion) and is soldered to the PCB 4 in parallel with the PCB 4. The contact portions 21 overlap the vertical center line of the conductive pad 31, that is, each contact portion 21 is in centered contact with the corresponding conductive pad 31.

The width of the elastic arm 22 is equal to the width of the conductive gasket 31 or is approximately equal within the manufacturing accuracy tolerance range of +/-0.05 mm, an included angle smaller than 5 degrees is formed between the upper section of the elastic arm 22 connected with the contact part 21 and the insertion direction of the butt-joint card 3 when the butt-joint card 3 is not inserted into the base 1, and the upper section of the elastic arm is parallel to the insertion direction of the butt-joint card 3 when the butt-joint card 3 is inserted into the base 1 or is approximately parallel within the manufacturing accuracy tolerance range of +/-3 degrees. The distance d1 between the upper section of the elastic arm 22 and the conductive pad 31 is less than 0.20mm when the butt-joint card 3 is inserted into the base 1, the lower end of the upper section is flush with the lower end of the conductive pad 31 when the butt-joint card 3 is inserted into the base 1, and the manufacturing precision tolerance of the flush is +/-0.25 mm.

The elastic arm 22 comprises a first force arm 221 and a second force arm 222 which are connected up and down, the first force arm 221 is formed by vertically extending from the lower end of the contact part 21, the second force arm 222 is formed by vertically extending after the lower end of the first force arm 221 bends and extends towards the direction far away from the central slot, the lower end of the second force arm 222 is connected with the holding part 23, the first force arm 221 comprises a transition part 2211 which is used for enabling the width of the first force arm 221 to be transited to the width of the contact part 21, the width of the transition part 2211 is gradually reduced from the end far away from the contact part 21 to the end close to the contact part 21, the width d2 of the first force arm 221 and the width d3 of the second force arm 222 are equal to the width d4 of the conductive gasket 31 or are approximately equal in the range of manufacturing precision tolerance +/-0.05 mm, and the first force arm 221 is the upper section of the elastic arm 22.

The holding portion 23 includes a first protrusion 231, a first recess 232, a second protrusion 233, a second recess 234 and a third protrusion 235 connected in sequence from top to bottom, the upper end of the first protrusion 231 is connected to the lower end of the elastic arm 22, the lower end of the third protrusion 235 is connected to the welding portion 24, two sides of the third protrusion 235 in the width direction are the tape connecting portion 236, a clamping point 237 is protruded on one side surface of the second protrusion 233 in the thickness direction, a distance L1 between the clamping point 237 and the first protrusion 231 is equal to a distance L2 between the clamping point 237 and the tape connecting portion 236, and the manufacturing tolerance is ± 0.1 mm. The width d5 of the first recess 232 and the width d6 of the second recess 234 are equal, and the manufacturing precision tolerance is equal +/-0.1 mm. The distance d7 between the interface of the holding part 23 and the elastic arm 22 and the contact point of the contact part 21 is equal to the distance d8 between the interface of the holding part 23 and the elastic arm 22 and the surface of the PCB 4.

Compared with the prior art, the invention has the following beneficial effects: the width of the elastic arm 22 is designed to be equal to the width of the conductive pad 31, the upper section of the elastic arm 22 is designed to form an included angle of less than 5 degrees with the insertion direction of the docking card 3 when the docking card 3 is not inserted into the base 1, to be parallel to the insertion direction of the docking card 3 when the docking card is inserted into the base 1 or to be nearly parallel within the manufacturing accuracy tolerance range of +/-3 degrees, the upper section of the elastic arm 22 is designed to have a distance of less than 0.20mm from the conductive pad 31 when the docking card 3 is inserted into the base 1, the lower end of the upper section is designed to be flush with the lower end of the conductive pad 31 when the docking card 3 is inserted into the base 1, the central distance between the clamping point 237 and the first convex part 231 and the central distance between the clamping point 237 and the strip connecting part 236 are designed to be equal, the width of the first concave part 232 and the width of the second concave part 234 are designed to be equal, and the distance between the interface between the holding part 23 and the elastic arm 22 and the contact point of the contact part 21 is designed to be equal to the interface between the holding part 23 and the elastic arm 22 and the interface of the surface of the PCB 4 In the form, the characteristic impedance fluctuation of the signal terminal is reduced, the loss of signal transmission is greatly reduced, and the signal integrity of the electric connector is greatly improved; and the signal terminal and the grounding terminal are consistent in structure, and the production and the manufacture of products are finished without multiple sets of dies and multiple assembling, so that the manufacturing cost is greatly reduced.

Example two

As shown in fig. 9, the present embodiment is different from the first embodiment in that: the soldering portion 24 is a DIP type soldering portion (through-type soldering portion) and is soldered to the PCB 4 so as to vertically penetrate the PCB 4.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.

Claims

1. The utility model provides a high-speed connector, its includes that the surface has the butt joint card of conducting pad to peg graft the base and locate a plurality of metal terminals in the base, and the pedestal mounting is on the PCB board, and each metal terminal includes from last contact site, elastic arm, the fixing portion and the welding part of connecting according to the preface extremely down, its characterized in that: the width of the elastic arm is equal to the width of the conductive gasket or approximately equal to the width of the conductive gasket within the range of manufacturing precision +/-0.05 mm, the upper section of the elastic arm, which is connected with the contact part, forms an included angle smaller than 5 degrees with the insertion direction of the butt card when the butt card is not inserted into the base, is parallel to the insertion direction of the butt card when the butt card is inserted into the base or is approximately parallel to the manufacturing precision +/-3 degrees, the distance between the upper section of the elastic arm and the conductive gasket is less than 0.20mm when the upper section of the elastic arm is positioned in the butt card insertion base, the lower end of the upper section is flush with the lower end of the conductive gasket when the butt card is inserted into the base, the fixing part comprises a first convex part, a first concave part, a second convex part, a second concave part and a third convex part which are sequentially connected up and down, the upper end of the first convex part is connected with the lower end of the elastic arm, the lower end of the third convex part is connected with the welding part, and two sides of the third convex part in the width direction are provided with connecting parts, the clamping point is protruded on the surface of one side of the second convex part in the thickness direction, the center distance between the clamping point and the first convex part is equal to the center distance between the clamping point and the material belt connecting part, the width of the first concave part is equal to the width of the second concave part, and the distance between the junction of the fixing part and the elastic arm and the contact point of the contact part is equal to the distance between the junction of the fixing part and the elastic arm and the surface of the PCB.

2. The high-speed connector of claim 1, wherein: the elastic arm comprises a first force arm and a second force arm which are connected up and down, the first force arm is formed by vertically extending from the lower end of the contact part downwards, the second force arm is formed by vertically extending from the lower end of the first force arm towards the direction far away from the insertion part, the lower end of the second force arm is connected with the fixing part, the first force arm comprises a transition part for enabling the width of the first force arm to be transited to the width of the contact part, the widths of the first force arm and the second force arm are equal to the width of the conductive gasket or are approximately equal within the manufacturing precision tolerance range of +/-0.05 mm, and the first force arm is the upper section of the elastic arm.

3. The high-speed connector according to claim 1 or 2, wherein: the metal terminal comprises a signal terminal and a grounding terminal, the structure of the signal terminal is the same as that of the grounding terminal, the upper end of the contact part is connected with the pressing part through the guide part, the contact part is overlapped with the vertical center line of the conductive gasket, the lower end of the fixing part is connected with the welding part through the extending part, and the welding part is an SMT (surface mount technology) type welding part or a DIP (dual in-line package) type welding part.