CN116799561A - U2 male end and connector convenient to promote SI performance - Google Patents

Abstract

The application discloses a U2 male end and a connector which are convenient for improving SI performance, wherein the U2 male end comprises a rubber shell, a plurality of signal terminals, one ends of which are used for being connected with a PCB, and one ends of which are used for realizing signal transmission after being contacted with a first signal terminal in a female end of the connector, and the connector is characterized in that: the rubber shell comprises a rubber shell body and an extension part connected with the rubber shell body, and the extension part is provided with a mounting groove; the signal terminal comprises an upper terminal and a lower terminal, one end of the lower terminal is used for being connected with the PCB after being fixedly arranged on the rubber shell body, and the other end of the lower terminal extends into the mounting groove; the upper terminal is fixedly arranged on a plastic part, the plastic part is rotatably arranged in the mounting groove, and the upper terminal is provided with a first inclined plane. The connector can effectively solve the technical problem that the length of the signal terminal needs to be designed according to the wiping length on the premise that the wiping length is required when connectors are mutually matched in the prior art, and the SI performance of the connector is reduced.

Description

U2 male end and connector convenient to promote SI performance

Technical Field

The application relates to the technical field of signal transmission equipment, in particular to a U2 male end and a connector convenient for improving SI performance.

Background

The U2 connector is a brand new physical electrical interface designed for a high-performance storage medium (mainly a drive type SSD at present), and based on the pin definition of an SFF-8482 interface (the physical electrical interface of a SAS hard disk), namely the downward compatible SATA/SAS hard disk, a new pin definition is added, and a single U2 interface can maximally use a PCIe x4 channel, so that a basic condition is provided for high-performance transmission between the drive type SSD and a host.

In practical use, one product is required to meet multiple high frequency performance requirements simultaneously. Along with the continuous increase of the data storage quantity, the transmission rate requirement is also continuously improved; the application of the product is wider and wider, the existing U2 connector can reach the transmission rate of 32Gbps, but the SI performance requirement is also improved; several channels of PCIe in a U2 connector may be prone to crosstalk when used simultaneously, and crosstalk between internal terminals (differential pairs) of the channels may also be prone to occur, which affects the performance of the overall connector.

Because the male end and the female end of the connector have standard requirements for wiping lengths with each other when they are mated, the lengths of the signal terminals need to be confirmed according to the wiping lengths, which results in serious influence on SI performance of the connector.

Disclosure of Invention

The application aims to provide a U2 male end and a connector which are convenient for improving SI performance, and can effectively solve the technical problem that the length of a signal terminal needs to be designed according to the wiping length on the premise that the wiping length is required when connectors are mutually matched in the prior art, thereby reducing the SI performance of the connector.

In order to solve the technical problems, the application adopts the following technical scheme:

the U2 male end convenient for improving SI performance comprises a rubber shell, wherein a plurality of signal terminals with one ends for being connected with a PCB (printed circuit board) and one ends for being contacted with a first signal terminal in a female end of a connector to realize signal transmission are inserted into the rubber shell, the rubber shell comprises a rubber shell body and an extension part connected with the rubber shell body, and an installation groove is formed in the extension part;

the signal terminal comprises an upper terminal and a lower terminal, one end of the lower terminal is used for being connected with the PCB after being fixedly arranged on the rubber shell body, and the other end of the lower terminal extends into the mounting groove;

the upper terminal is fixedly arranged on a plastic part, the plastic part is rotatably arranged in the mounting groove, the upper terminal is provided with a first inclined plane, and the lower terminal is provided with a second inclined plane;

the plastic shell body is provided with a linkage mechanism, the linkage mechanism is connected with the plastic part, and when the plastic shell at the male end is spliced with the female end of the connector, the female end is used for pushing the linkage mechanism to act, and the plastic part is driven to rotate so that the first inclined plane and the second inclined plane are contacted with or separated from each other.

Wherein, the rubber shell body and the extension part are of an integrated structure.

Wherein, upper portion terminal and plastic part form integral type structure through injection molding technology.

Further limited, be provided with the mounting hole with the mounting groove intercommunication on the extension, plastic part both sides are provided with the pivot, and the plastic part is installed in the mounting groove through the pivot rotation, all is connected with link gear in the pivot of plastic part both sides.

The linkage mechanism comprises a first tension spring, a second tension spring, a pull rope and a wrench, a first limit column and a second limit column are arranged on the rotating shaft, the first limit column is horizontally arranged, the second limit column is vertically arranged, one end of the first tension spring is connected with the extension part, and the other end of the first tension spring is connected with the first limit column;

the mounting groove is internally provided with a pin column, the extension part is provided with a yielding groove, the yielding groove is communicated with the mounting groove, one end of the wrench is rotationally connected with the pin column, the other end of the wrench penetrates through the yielding groove, the second tension spring is connected with the pull rope, the upper end of the pull rope is connected with the second limit column, the lower end of the second tension spring is connected with the wrench, and under the action of the first tension spring and the second tension spring, the first inclined plane is in close contact with the second inclined plane.

Further preferably, a first pin is arranged in the mounting groove, and the lower end of the first tension spring is connected with the first pin.

Wherein, the spanner middle part is provided with spacing portion, and second extension spring lower extreme and spacing portion contact.

The application also discloses a connector, which comprises a female end and a male end which is spliced with the female end, wherein the male end is the U2 male end which is convenient for improving SI performance.

Further preferably, guiding plug-in parts are arranged at two ends of the rubber shell body in the male end, plug-in grooves are formed in the plug-in parts, and plug-in ends corresponding to the plug-in grooves are arranged at the female end.

Compared with the prior art, the application has the following beneficial effects:

the application is mainly used for realizing connection with the female end of the connector in actual use, and when the female end of the connector is spliced with the male end of the connector, the plastic part with the upper terminal can rotate under the action of the linkage mechanism, so that the separation of the upper terminal and the lower terminal is realized; in a normal state, under the action of the linkage mechanism, a first inclined plane on the upper terminal is tightly contacted with a second inclined plane on the lower terminal to form a complete signal terminal structure, and a separation interface is formed at the contact position of the first inclined plane and the second inclined plane; in the plugging process, a first signal terminal on the female end of the connector is directly contacted with an upper terminal, when the first signal terminal just wipes a separation interface, the female end is contacted with a linkage mechanism, and at the moment, the linkage mechanism directly drives a plastic part to rotate, so that the upper terminal is separated from a lower terminal; therefore, when the male end and the female end are mutually matched, the overall length of the signal terminal is reduced on the premise of ensuring that the standard wiping length is met, and the redundant part of the signal terminal without positive effect on signal transmission is further reduced; the technical problem that the length of the signal terminal needs to be designed according to the wiping length on the premise that the wiping length is required when connectors are mutually matched in the prior art can be effectively solved, and the SI performance of the connector is reduced; the SI performance of the connector can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic overall structure of a first embodiment of the present application.

Fig. 2 is an enlarged partial schematic view of fig. 1 at a in accordance with the present application.

Fig. 3 is a schematic diagram of a connection relationship between a signal terminal and a plastic member according to the present application.

FIG. 4 is a schematic diagram of the connection between the linkage mechanism and the plastic part according to the present application.

Fig. 5 is a schematic diagram of the overall structure of the signal terminal of the present application.

Fig. 6 is a schematic overall structure of a third embodiment of the present application.

Fig. 7 is an impedance diagram of a prior art connector.

Fig. 8 is an impedance diagram of the connector of the present application.

Fig. 9 is a diagram showing the insertion loss of a connector according to the prior art.

Fig. 10 is a diagram showing the insertion loss of the connector according to the present application.

Fig. 11 is a return loss diagram of a prior art connector.

Fig. 12 is a return loss diagram of the connector of the present application.

Reference numerals:

101-a rubber shell, 102-a PCB board, 103-a female end, 104-a first signal terminal, 105-a signal terminal, 106-a rubber shell body, 107-an extension part, 108-a mounting groove, 109-an upper terminal, 110-a lower terminal, 111-a plastic part, 112-a first inclined plane, 113-a second inclined plane, 114-a linkage mechanism, 115-a mounting hole, 116-rotating shaft, 117-first tension spring, 118-second tension spring, 119-stay cord, 120-spanner, 121-first spacing post, 122-second spacing post, 123-pin post, 124-groove of stepping down, 125-groove, 126-bump, 127-first groove of stepping down, 128-guide grafting portion, 129-grafting groove, 130-grafting end.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the embodiments of the present application, it should be understood that the terms "length," "vertical," "horizontal," "top," "bottom," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the embodiments of the present application and to simplify the description, rather than to indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In embodiments of the application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the application. In order to simplify the disclosure of embodiments of the present application, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present application. Furthermore, embodiments of the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1-5, the embodiment discloses a U2 male terminal for improving SI performance, which includes a rubber shell 101, wherein a plurality of signal terminals 105 with one ends for connecting with a PCB 102 and one ends for contacting with a first signal terminal 104 in a female connector 103 are inserted into the rubber shell 101, the rubber shell 101 includes a rubber shell body 106 and an extension portion 107 connected with the rubber shell body 106, and an installation groove 108 is provided on the extension portion 107;

the signal terminal 105 includes an upper terminal 109 and a lower terminal 110, wherein after the lower terminal 110 is fixedly mounted on the rubber housing body 106, one end of the lower terminal is used for being connected with the PCB 102, and the other end extends into the mounting groove 108;

the upper terminal 109 is fixedly arranged on a plastic part 111, the plastic part 111 is rotatably arranged in the mounting groove 108, the upper terminal 109 is provided with a first inclined plane 112, and the lower terminal 110 is provided with a second inclined plane 113;

the plastic shell body 106 is provided with a linkage mechanism 114, the linkage mechanism 114 is connected with the plastic part 111, when the plastic shell 101 at the male end is inserted into the female end 103 of the connector, the female end 103 is used for pushing the linkage mechanism 114 to act, and the plastic part 111 is driven to rotate so that the first inclined plane 112 and the second inclined plane 113 are contacted or separated from each other.

The application is mainly used for realizing connection with the female end 103 of the connector in actual use, and when the female end 103 of the connector is spliced with the male end, the plastic part 111 with the upper terminal 109 can rotate under the action of the linkage mechanism 114, so that the separation or contact between the upper terminal 109 and the lower terminal 110 is realized; in a normal state, under the action of the linkage mechanism 114, the first inclined surface 112 on the upper terminal 109 is tightly contacted with the second inclined surface 113 on the lower terminal 110 to form a complete signal terminal structure, and a separation interface is formed at the contact position of the first inclined surface 112 and the second inclined surface 113;

in the plugging process, the first signal terminal 104 on the female end 103 of the connector will directly contact with the upper terminal 109, when the first signal terminal 104 just wipes the separation interface, the female end 103 will contact with the linkage mechanism 114 at this time, and at this time, the linkage mechanism 114 will directly drive the plastic part 111 to rotate, so that the upper terminal 109 and the lower terminal 110 are separated; thus, the whole length of the signal terminal 105 is reduced on the premise of ensuring that the standard wiping length is met when the male end and the female end 103 are mutually matched, and the redundant part of the signal terminal 105 without positive effect on signal transmission is further reduced; furthermore, the technical problem that the SI performance of the connector is reduced and the SI performance of the connector can be effectively improved because the length of the signal terminal 105 needs to be designed according to the wiping length on the premise that the wiping length is required when connectors are mutually matched in the prior art can be effectively solved.

In the present embodiment, the rubber housing body 106 and the extension portion 107 are integrally formed, and the rubber housing body 106 and the extension portion 107 are manufactured by injection molding.

Wherein, the upper terminal 109 and the plastic part 111 form an integral structure through an injection molding process.

Further preferably, the extension part 107 is provided with a mounting hole 115 communicated with the mounting groove 108, two sides of the plastic part 111 are provided with rotating shafts 116, the plastic part 111 is rotatably mounted in the mounting groove 108 through the rotating shafts 116, and the rotating shafts 116 at two sides of the plastic part 111 are connected with a linkage mechanism 114; the rotation shaft 116 is arranged so as to realize stable rotation of the plastic part 111.

The linkage mechanism 114 comprises a first tension spring 117, a second tension spring 118, a pull rope 119 and a wrench 120, a first limiting column 121 and a second limiting column 122 are arranged on the rotating shaft 116, the first limiting column 121 is horizontally arranged, the second limiting column 122 is vertically arranged, one end of the first tension spring 117 is connected with the extension part 107, and the other end of the first tension spring 117 is connected with the first limiting column 121;

the installation groove 108 is internally provided with a pin 123, the extension part 107 is provided with a yielding groove 124, the yielding groove 124 is communicated with the installation groove 108, one end of the wrench 120 is rotationally connected with the pin 123, the other end of the wrench passes through the yielding groove 124, the second tension spring 118 is connected with the pull rope 119, the upper end of the pull rope 119 is connected with the second limit post 122, the lower end of the second tension spring 118 is connected with the wrench 120, and under the action of the first tension spring 117 and the second tension spring 118, the first inclined plane 112 is tightly contacted with the second inclined plane 113.

In this way, the plastic part 111 can be in a dynamic balance state through the first tension spring 117, the second tension spring 118 and the pull rope 119, and under the action of the first tension spring 117 and the second tension spring 118 in a normal state, the first inclined plane 112 is tightly contacted with the second inclined plane 113, so that the upper terminal 109 and the lower terminal 110 can be tightly connected, and a complete signal terminal 105 structure is formed; the first inclined plane 112 and the second inclined plane 113 can play a limiting role; when the male end and the female end 103 are spliced, at this time, the first signal terminal 104 in the female end 103 is wiped with the upper terminal 109, when the first signal terminal 104 just wipes the separation interface and contacts with the lower terminal 110, at this time, the female end 103 just contacts with the wrench 120, in the continuous matching process, the wrench 120 rotates around the pin 123, the wrench 120 pulls the second tension spring 118 and the pull rope 119, at this time, the plastic part 111 overcomes the tension of the first tension spring 117 and rotates to separate the first inclined plane 112 from the second inclined plane 113; and further, the length of the signal terminal 105 is reduced under the condition that the wiping length is met, redundant parts, which have no positive effect on signal transmission, on the signal terminal 105 are reduced, the attenuation of signals is reduced, and the SI performance is improved.

Wherein, the mounting groove 108 is provided with a first pin, and the lower end of the first tension spring 117 is connected with the first pin.

Further preferably, a limiting portion is arranged in the middle of the wrench 120, and the lower end of the second tension spring 118 is in contact with the limiting portion. Of course, in actual use, a notch may be provided in the middle of the wrench 120, so that the second tension spring 118 may be limited; the second tension spring 118 can be prevented from sliding through the limiting part, so that the spanner 120 can pull the second tension spring 118 when rotating, and a labor-saving lever structure is formed.

Further preferably, in actual use, the first inclined surface 112 of the upper terminal 109 is provided with a groove 125, the second inclined surface 113 of the lower terminal 110 is provided with a protrusion 126, and the bottom of the groove 125 and the end of the protrusion 126 are inclined surfaces; in this way, in actual use, the sliding displacement of the upper terminal 109 and the lower terminal 110 can be avoided by the protrusion 126 and the groove 125, and the tightness of the connection between the upper terminal 109 and the lower terminal 110 can be further improved.

Further optimizing, in actual use, be provided with on the extension 107 with the mounting groove 108 the first groove 127 of stepping down of communicating, first spacing post 121 is located the first groove 127 of stepping down, realizes stepping down to first spacing post 121 for overall structure is compacter.

Example two

The first embodiment is further optimized based on the first embodiment, in the first embodiment, a sliding groove is formed in the mounting groove 108, the first pin is slidably arranged in the sliding groove through a sliding block, and a locking screw is arranged on the sliding block; in this way, the position of the first pin can be adjusted, so that the tension of the first tension spring 117 can be adjusted, and further the normal position of the plastic part 111 can be adjusted.

Example III

Referring to fig. 6, the present embodiment discloses a connector, which includes a female end 103 and a male end that is plugged with the female end 103, and the male end embodiment is a U2 male end that is convenient for improving SI performance.

In actual use, the two ends of the rubber shell body 106 in the male end are provided with guiding plug-in parts 128, the plug-in parts are provided with plug-in grooves 129, the female end 103 is provided with plug-in ends 130 corresponding to the plug-in grooves 129, and the male end and the female end 103 are more stable in plug-in connection through the plug-in grooves 129 and the plug-in ends 130.

In practical use, the male end and the female end are locked by a buckle.

In actual use, the signal terminals 105 generally comprise long signal terminals having a wiping plane length l1=6.85 mm and short signal terminals having a wiping plane l2=6.35 mm:

the lower terminal 110 of the long and short signal terminals typically has a planar length l3=4.45 mm;

namely:

redundant portions in long signal terminals: a=l1-l3=2.4 mm;

redundant portions in the short signal terminals: b=l2-l3=1.9 mm;

in the application, the signal terminals (comprising the long signal terminal and the short signal terminal) are arranged into a split structure, so that separation can be realized after mutual matching wiping.

It should be noted that, in the present application, the SI performance of the connector specifically includes impedance, insertion loss and return loss, so that, for those skilled in the art to understand the SI performance more intuitively, the SI performance is further described below:

in the PCIE signal transmission specification, the target impedance is set to 85 ohms for the whole signal transmission system, and under this impedance, the signal transmission loss is optimal, so in the whole PCIE signal transmission system, all electronic components are close to the impedance of 85 ohms as much as possible; the impedance affects the signal transmission loss, and the transmission loss is mainly represented by insertion loss and return loss; the insertion loss can be understood as the signal loss caused by the intervention of the male end and the female end of the connector in the signal transmission system, so that the smaller the insertion loss is, the better the insertion loss is; return loss is understood to be the loss of power of a reflected or returned signal, i.e., return loss, when a signal enters or leaves a male or female connector, a discontinuity or impedance mismatch (which is also the reason that requires the impedance of the components to be as close as possible to 85 ohms) will result in a signal reflection or return, and it can be seen that the impedance is strongly correlated with the return loss.

In order to better embody the SI performance of the connector disclosed by the application, the conventional connector in the prior art and the connector disclosed by the application are adopted to carry out simulation so as to realize the test of the SI performance;

when the comparison simulation test is performed, simulation software and a simulation method in the prior art are adopted, and the comparison simulation test is not repeated in the application; when the simulation test is performed, in order to ensure the accuracy of the simulation result, other parameters are kept the same except that the signal transmission structure (signal terminal) of the connector in the prior art is different from the signal transmission structure (split signal terminal) of the connector.

The specific test results are as follows:

1. impedance simulation contrast

Referring to fig. 7 and 8, as can be seen from fig. 7 and 8, the general connector has an impedance of about 76 ohms when the X-coordinate 110PS position is the impedance low point caused by the corresponding stub; after the redundant part of the signal terminal 105 is reduced, the corresponding impedance of the X coordinate 110ps is about 86 ohms, and is closer to the target impedance 85 ohms determined by the PCIE signal system, so that the impedance low point caused by too long stub is reduced.

Where stub refers to a redundant portion of the terminal that has no positive effect on signal transmission.

2. Insertion loss simulation comparison

Referring to fig. 9 and 10, the closer the insertion loss (Y-axis) is to 0, the better, in fig. 9 and 10, the lower shaded broken line is PCIE signal specification standard line; the insertion loss dip slope in fig. 10 is significantly smaller than that of fig. 9, i.e., the insertion loss value is closer to 0 at the same frequency (X-axis) and the margin is significantly larger for the specification.

3. Return loss simulation contrast

Referring to fig. 11 and 12, the upper hatched broken line in fig. 11 and 12 is a PCIE signal specification standard line, the margin between the return loss in fig. 12 and the standard line is significantly larger, and line a and line B are return losses from different ports (male end and female end 103) for the same electrical path; in fig. 11, the line a and the line B are closer to the standard line, and in the actual production process of the product, the product may be scrapped due to poor signal transmission caused by fluctuation of the production process and smaller return loss margin. In fig. 12, the return loss margin is significantly larger, so that the rejection rate caused by poor signal transmission due to process fluctuation in production can be reduced, and the production cost of the connector is reduced.

In summary, in practical use, the application can effectively improve the SI performance of the connector, reduce the loss during signal transmission of the connector, improve the signal transmission quality of the connector, reduce the rejection rate of the connector in the production process, reduce the production cost of the connector, and ensure that the performance of the connector is more stable.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

The foregoing description of the preferred embodiment of the application is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (9)

1. The utility model provides a public end of U2 convenient to promote SI performance, includes gluey shell, and it is used for being connected with the PCB board to insert a plurality of one ends on the gluey shell, and one end is used for realizing signal transmission's signal terminal after contacting with the first signal terminal in the female end of connector, its characterized in that:

the rubber shell comprises a rubber shell body and an extension part connected with the rubber shell body, and the extension part is provided with a mounting groove;

the signal terminal comprises an upper terminal and a lower terminal, one end of the lower terminal is used for being connected with the PCB after being fixedly arranged on the rubber shell body, and the other end of the lower terminal extends into the mounting groove;

the upper terminal is fixedly arranged on a plastic part, the plastic part is rotatably arranged in the mounting groove, the upper terminal is provided with a first inclined plane, and the lower terminal is provided with a second inclined plane;

be provided with link gear on the rubber shell body, link gear is connected with the plastic piece, and when rubber shell and the female end grafting of connector, female end is used for promoting link gear action after, makes first inclined plane and the mutual contact of second inclined plane or separation after driving the plastic piece rotation.

2. The U2 male terminal for facilitating SI performance improvement of claim 1, wherein: the rubber shell body and the extension part are of an integrated structure.

3. The U2 male terminal for facilitating SI performance improvement of claim 1, wherein: the upper terminal and the plastic part form an integrated structure through an injection molding process.

4. The U2 male terminal for facilitating SI performance improvement of claim 1, wherein: the extension is provided with the mounting hole with the mounting groove intercommunication, and the plastic part both sides are provided with the pivot, and the plastic part is installed in the mounting groove through the pivot rotation, all is connected with link gear in the pivot of plastic part both sides.

5. The U2 male terminal for facilitating SI performance improvement of claim 1, wherein: the linkage mechanism comprises a first tension spring, a second tension spring, a pull rope and a spanner, a first limit column and a second limit column are arranged on the rotating shaft, the first limit column is horizontally arranged, the second limit column is vertically arranged, one end of the first tension spring is connected with the extension part, and the other end of the first tension spring is connected with the first limit column;

the mounting groove is internally provided with a pin column, the extension part is provided with a yielding groove, the yielding groove is communicated with the mounting groove, one end of the wrench is rotationally connected with the pin column, the other end of the wrench penetrates through the yielding groove, the second tension spring is connected with the pull rope, the upper end of the pull rope is connected with the second limit column, the lower end of the second tension spring is connected with the wrench, and under the action of the first tension spring and the second tension spring, the first inclined plane is in close contact with the second inclined plane.

6. The U2 male terminal for facilitating SI performance enhancement of claim 5, wherein: a first pin is arranged in the mounting groove, and the lower end of the first tension spring is connected with the first pin.

7. The U2 male terminal for facilitating SI performance enhancement of claim 5, wherein: the middle part of the spanner is provided with a limiting part, and the lower end of the second tension spring is contacted with the limiting part.

8. A connector, characterized in that: the male end is a U2 male end which is convenient for improving SI performance and is in any one of claims 1-8.

9. A connector as defined in claim 8, wherein: the two ends of the rubber shell body in the male end are provided with guiding plug-in parts, plug-in grooves are formed in the plug-in parts, and plug-in ends corresponding to the plug-in grooves are formed in the female end.