A u2 male terminal and connector facilitating improvement of si performance

Abstract

This invention discloses a U2 male terminal and connector that facilitates improved SI performance. The U2 male terminal includes a housing with several signal terminals inserted into it, one end for connecting to a PCB board and the other end for contacting a first signal terminal in the female connector to transmit signals. The housing comprises a housing body and an extension connected to the housing body, the extension having a mounting groove. The signal terminals include an upper terminal and a lower terminal. The lower terminal is fixedly mounted on the housing body, with one end for connecting to the PCB board and the other end extending into the mounting groove. The upper terminal is fixedly mounted on a plastic part, which is rotatably mounted in the mounting groove, and has a first inclined surface. In practical use, this invention effectively solves the technical problem in existing technologies where the length of the signal terminals needs to be designed based on the wiping length when connector mating is required, thus reducing the SI performance of the connector.

Description

Technical Field

[0001] This invention relates to the field of signal transmission equipment technology, specifically to a U2 male terminal and connector that facilitates improved SI performance. Background Technology

[0002] The U2 connector is a new physical electrical interface designed for high-performance storage media (currently mainly SSDs in drive form). While retaining the pin definitions of the SFF-8482 interface (the physical electrical interface of SAS hard drives) (backward compatible with SATA / SAS hard drives), it adds new pin definitions. A single U2 interface can use up to 4 PCIe lanes, providing the foundation for high-performance data transfer between SSDs in drive form and the host.

[0003] In practical applications, a single product needs to meet multiple high-frequency performance requirements simultaneously. As data storage volume continues to grow, transmission rate requirements also increase. Furthermore, the application of products is becoming increasingly widespread. Existing U2 connectors can achieve a transmission rate of 32Gbps, but SI performance requirements also increase accordingly. When several PCIe channels in a U2 connector are used simultaneously, crosstalk can easily occur, as can crosstalk between terminals (differential pairs) within the channels, affecting the overall performance of the connector.

[0004] Because there are standard requirements for the mutual wiping length when the male and female terminals of the connector are mated, the length of the signal terminal needs to be confirmed based on the wiping length, which in turn seriously affects the SI performance of the connector. Summary of the Invention

[0005] The purpose of this invention is to provide a U2 male terminal and connector that facilitates improved SI performance. In practical use, it can effectively solve the technical problem in the prior art where the length of the signal terminal needs to be designed according to the wiping length when the connector is mated, which reduces the SI performance of the connector.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A U2 male connector that facilitates improved SI performance includes a housing with several signal terminals inserted into it. One end of the signal terminal is used to connect to the PCB board, and the other end is used to contact the first signal terminal in the female connector to transmit signals. The housing includes a housing body and an extension connected to the housing body. The extension is provided with a mounting groove.

[0008] The signal terminal includes an upper terminal and a lower terminal. After the lower terminal is fixedly installed on the housing body, one end is used to connect to the PCB board, and the other end extends into the mounting groove.

[0009] The upper terminal is fixedly mounted on a plastic part, and the plastic part is rotatably mounted in the mounting groove. The upper terminal is provided with a first inclined surface, and the lower terminal is provided with a second inclined surface.

[0010] The housing body is equipped with a linkage mechanism, which is connected to the plastic part. When the male end of the housing is inserted into the female end of the connector, the female end is used to push the linkage mechanism to rotate, causing the first inclined surface and the second inclined surface to come into contact or separate.

[0011] The body of the plastic shell and the extension are an integral structure.

[0012] The upper terminal and the plastic part are integrated into a single structure through injection molding.

[0013] Further, the extension is provided with a mounting hole that communicates with the mounting groove, and the plastic part is provided with a rotating shaft on both sides. The plastic part is installed in the mounting groove by rotating the rotating shaft, and a linkage mechanism is connected to the rotating shaft on both sides of the plastic part.

[0014] The linkage mechanism includes a first tension spring, a second tension spring, a pull rope, and a wrench. A first limiting post and a second limiting post are provided on the rotating shaft. The first limiting post is horizontally set, and the second limiting post is vertically set. One end of the first tension spring is connected to the extension, and the other end is connected to the first limiting post.

[0015] A pin is provided in the mounting groove, and a clearance groove is provided on the extension. The clearance groove is connected to the mounting groove. One end of the wrench is rotatably connected to the pin, and the other end passes through the clearance groove. The second tension spring is connected to the pull rope. The upper end of the pull rope is connected to the second limit post, and the lower end of the second tension spring is connected to the wrench. Under the action of the first tension spring and the second tension spring, the first inclined surface and the second inclined surface are in close contact.

[0016] Further optimization involves installing a first pin in the mounting slot, with the lower end of the first tension spring connected to the first pin.

[0017] The wrench has a limiting part in the middle, and the lower end of the second tension spring contacts the limiting part.

[0018] The present invention also discloses a connector, including a female end and a male end that is plugged into the female end, wherein the male end is the aforementioned U2 male end which facilitates the improvement of SI performance.

[0019] Further optimization involves providing guide insertion parts at both ends of the male end's housing body, with insertion slots on the insertion parts, and providing insertion ends corresponding to the insertion slots on the female end.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In practical use, this invention is mainly used to achieve connection with the female end of a connector. During insertion, when the female end of the connector is inserted into the male end, the plastic part with the upper terminal can rotate under the action of the linkage mechanism, thereby separating the upper terminal from the lower terminal. Under normal conditions, under the action of the linkage mechanism, the first inclined surface on the upper terminal and the second inclined surface on the lower terminal are in close contact, forming a complete signal terminal structure, and a separation interface is formed at the contact position of the first inclined surface and the second inclined surface. During the insertion process, the first signal terminal on the female end of the connector will directly contact the upper terminal. When the first signal terminal is just wiping... When passing through the separation interface, the female terminal will contact the linkage mechanism. At this point, the linkage mechanism will directly drive the plastic part to rotate, causing the upper terminal to separate from the lower terminal. This ensures that when the male and female terminals are mated, the overall length of the signal terminals is reduced while meeting the standard wiping length. This reduces the redundancy of the signal terminals that do not contribute positively to signal transmission. Consequently, it effectively solves the technical problem in existing technologies where the length of the signal terminals needs to be designed based on the wiping length when connectors are mated, which reduces the connector's SI performance. This effectively improves the SI performance of the connector. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0024] Figure 2 For the present invention Figure 1 A magnified view of a portion of point A in the middle.

[0025] Figure 3 This is a schematic diagram showing the connection relationship between the signal terminal and the plastic part of the present invention.

[0026] Figure 4 This is a schematic diagram showing the connection relationship between the linkage mechanism and the plastic part of the present invention.

[0027] Figure 5 This is a schematic diagram of the overall structure of the signal terminal of the present invention.

[0028] Figure 6 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention.

[0029] Figure 7This is an impedance diagram of a connector in the prior art.

[0030] Figure 8 This is the impedance diagram of the connector in this invention.

[0031] Figure 9 This is a diagram showing the insertion loss of connectors in the prior art.

[0032] Figure 10 This is a diagram showing the insertion loss of the connector in this invention.

[0033] Figure 11 This is a return loss diagram for connectors in the prior art.

[0034] Figure 12 This is a return loss diagram of the connector in this invention.

[0035] Figure label:

[0036] 101-Housing shell, 102-PCB board, 103-Female end, 104-First signal terminal, 105-Signal terminal, 106-Housing shell body, 107-Extension, 108-Mounting groove, 109-Upper terminal, 110-Lower terminal, 111-Plastic part, 112-First inclined surface, 113-Second inclined surface, 114-Linkage mechanism, 115-Mounting hole, 116-Rotating shaft, 117-First tension spring, 118-Second tension spring, 119-Pull rope, 120-Wrench, 121-First limiting post, 122-Second limiting post, 123-Pin, 124-Relief groove, 125-Groove, 126-Protrusion, 127-First relief groove, 128-Guide insertion part, 129-Insertion groove, 130-Insertion end. Detailed Implementation

[0037] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0038] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0041] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0043] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Example 1

[0045] See Figures 1-5This embodiment discloses a U2 male terminal that facilitates the improvement of SI performance, including a housing 101. The housing 101 is fitted with a plurality of signal terminals 105, one end of which is used to connect to the PCB board 102 and the other end is used to contact the first signal terminal 104 in the connector female terminal 103 to realize signal transmission. The housing 101 includes a housing body 106 and an extension 107 connected to the housing body 106. The extension 107 is provided with a mounting groove 108.

[0046] The signal terminal 105 includes an upper terminal 109 and a lower terminal 110. After the lower terminal 110 is fixedly installed on the housing body 106, one end is used to connect to the PCB board 102, and the other end extends into the mounting groove 108.

[0047] The upper terminal 109 is fixedly mounted on a plastic part 111, and the plastic part 111 is rotatably mounted in the mounting groove 108. The upper terminal 109 is provided with a first inclined surface 112, and the lower terminal 110 is provided with a second inclined surface 113.

[0048] A linkage mechanism 114 is provided on the housing body 106. The linkage mechanism 114 is connected to the plastic part 111. When the male end of the housing 101 is inserted into the female end of the connector 103, the female end 103 is used to push the linkage mechanism 114 to rotate, so that the first inclined surface 112 and the second inclined surface 113 come into contact with or separate from each other.

[0049] In practical use, this invention is mainly used to connect with the female connector 103. When the female connector 103 is plugged into the male connector, the plastic part 111 with the upper terminal 109 can rotate under the action of the linkage mechanism 114, thereby realizing the separation or contact between the upper terminal 109 and the lower terminal 110. Under normal conditions, under the action of the linkage mechanism 114, the first inclined surface 112 on the upper terminal 109 and the second inclined surface 113 on the lower terminal 110 are in close contact 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.

[0050] During the insertion process, the first signal terminal 104 on the female end 103 of the connector will directly contact the upper terminal 109. When the first signal terminal 104 just wipes over the separation interface, the female end 103 will then contact the linkage mechanism 114. At this time, the linkage mechanism 114 will directly drive the plastic part 111 to rotate, causing the upper terminal 109 to separate from the lower terminal 110. This ensures that when the male and female ends 103 are mated, the overall length of the signal terminal 105 is reduced while ensuring that the standard wiping length is met. This reduces the redundant part of the signal terminal 105 that does not contribute positively to signal transmission. This effectively solves the technical problem in the prior art where the length of the signal terminal 105 needs to be designed according to the wiping length under the premise of the requirement for wiping length when the connector is mated, which reduces the SI performance of the connector. This effectively improves the SI performance of the connector.

[0051] In this embodiment, the housing body 106 and the extension 107 are an integral structure, and the housing body 106 and the extension 107 are manufactured by injection molding.

[0052] The upper terminal 109 and the plastic part 111 are integrated into one structure through injection molding.

[0053] Further optimization involves providing mounting holes 115 on the extension 107 that communicate with the mounting groove 108, and providing rotating shafts 116 on both sides of the plastic part 111. The plastic part 111 is rotatably mounted in the mounting groove 108 via the rotating shafts 116, and a linkage mechanism 114 is connected to the rotating shafts 116 on both sides of the plastic part 111. The rotating shafts 116 are provided to facilitate the stable rotation of the plastic part 111.

[0054] The linkage mechanism 114 includes a first tension spring 117, a second tension spring 118, a pull rope 119, and a wrench 120. A first limiting post 121 and a second limiting post 122 are provided on the rotating shaft 116. The first limiting post 121 is horizontally arranged, and the second limiting post 122 is vertically arranged. One end of the first tension spring 117 is connected to the extension 107, and the other end is connected to the first limiting post 121.

[0055] A pin 123 is provided in the mounting groove 108, and a clearance groove 124 is provided on the extension 107. The clearance groove 124 is connected to the mounting groove 108. One end of the wrench 120 is rotatably connected to the pin 123, and the other end passes through the clearance groove 124. The second tension spring 118 is connected to the pull rope 119. The upper end of the pull rope 119 is connected to the second limit post 122, and the lower end of the second tension spring 118 is connected to the wrench 120. Under the action of the first tension spring 117 and the second tension spring 118, the first inclined surface 112 and the second inclined surface 113 are in close contact.

[0056] Thus, the first tension spring 117, the second tension spring 118, and the pull cord 119 enable the plastic part 111 to maintain a dynamic balance. Under normal conditions, the first tension spring 117 and the second tension spring 118 ensure that the first inclined surface 112 and the second inclined surface 113 are in close contact, guaranteeing a tight connection between the upper terminal 109 and the lower terminal 110, forming a complete signal terminal 105 structure. The first inclined surface 112 and the second inclined surface 113 serve as limiting elements. When the male terminal is inserted into the female terminal 103, the first signal terminal 104 in the female terminal 103 rubs against the upper terminal 109. When the first signal terminal 104 just rubs... After wiping the separation interface and contacting the lower terminal 110, the female end 103 is in contact with the wrench 120. During the continuous mating process, the wrench 120 will rotate around the pin 123. The wrench 120 will pull the second tension spring 118 and the pull rope 119. At this time, the plastic part 111 will overcome the tension of the first tension spring 117 and rotate to separate the first inclined surface 112 and the second inclined surface 113. This ensures that the length of the signal terminal 105 is reduced while meeting the wiping length requirement, reducing the redundant parts on the signal terminal 105 that do not have a positive effect on signal transmission, thereby reducing signal attenuation and improving SI performance.

[0057] The mounting groove 108 is provided with a first pin, and the lower end of the first tension spring 117 is connected to the first pin.

[0058] Further optimization involves providing a limiting part in the middle of the wrench 120, with the lower end of the second tension spring 118 contacting the limiting part. Alternatively, in actual use, a groove can be provided in the middle of the wrench 120 to limit the movement of the second tension spring 118. The limiting part prevents the second tension spring 118 from sliding, ensuring that the wrench 120 can pull the second tension spring 118 when rotating, thus forming a force-saving lever structure.

[0059] Further optimization involves providing a groove 125 on the first inclined surface 112 of the upper terminal 109 and a protrusion 126 on the second inclined surface 113 of the lower terminal 110. Both the bottom of the groove 125 and the end of the protrusion 126 are inclined surfaces. In this way, under the action of the protrusion 126 and the groove 125, the upper terminal 109 and the lower terminal 110 can be prevented from sliding and shifting, thereby further improving the tightness of the connection between the upper terminal 109 and the lower terminal 110.

[0060] Further optimization: In actual use, the extension 107 is provided with a first clearance groove 127 that communicates with the mounting groove 108, and the first limiting post 121 is located in the first clearance groove 127, thereby making the first limiting post 121 clearance and making the overall structure more compact.

[0061] Example 2

[0062] This embodiment is a further optimization based on Embodiment 1. In this embodiment, a sliding groove is provided inside the mounting groove 108, and the first pin is slidably disposed in the sliding groove by a slider, and a locking screw is provided on the slider; in this way, the position of the first pin can be adjusted, the tension of the first tension spring 117 can be adjusted, and thus the normal position of the plastic part 111 can be adjusted.

[0063] Example 3

[0064] See Figure 6 This embodiment discloses a connector, including a female end 103 and a male end that is plugged into the female end 103, wherein the male end is the U2 male end described in Embodiment 1, which is convenient for improving SI performance.

[0065] In actual use, the male end of the housing body 106 is provided with guide insertion parts 128 at both ends, and insertion grooves 129 are provided on the insertion parts. The female end 103 is provided with insertion ends 130 corresponding to the insertion grooves 129. The insertion grooves 129 and insertion ends 130 make the male end and female end 103 more stable when inserted.

[0066] In actual use, the male and female terminals are locked together by a snap-fit ​​mechanism.

[0067] In practical applications, signal terminals 105 generally include long signal terminals and short signal terminals. The wiping plane length of the long signal terminal is L1 = 6.85 mm, and the wiping plane length of the short signal terminal is L2 = 6.35 mm.

[0068] The planar length of the lower terminal 110 in both long and short signal terminals is generally L3 = 4.45 mm;

[0069] Right now:

[0070] Redundancy in long signal terminals: A = L1 - L3 = 2.4 mm;

[0071] Redundancy in the short signal terminal: B = L2 - L3 = 1.9 mm;

[0072] In this application, the signal terminals (including long signal terminals and short signal terminals) are configured as a separate structure, which allows for separation after mutual wiping.

[0073] It should be noted that the SI performance of the connector in this application specifically includes impedance, insertion loss, and return loss. To facilitate a more intuitive understanding of SI performance by those skilled in the art, the SI performance is further explained below:

[0074] The PCIe signal transmission specification sets a target impedance of 85 ohms for the entire signal transmission system. At this impedance, signal transmission loss is optimal. Therefore, all electronic components in the PCIe signal transmission system strive to achieve an impedance close to 85 ohms. Impedance affects signal transmission loss, which is mainly manifested in insertion loss and return loss. Insertion loss can be understood as the signal loss caused by the involvement of the male and female terminals of the connector in the signal transmission system, so the lower the insertion loss, the better. Return loss can be understood as the signal reflection or echo caused by discontinuity or impedance mismatch when the signal enters or leaves the male or female connector (this is also the reason why the component impedance needs to be as close to 85 ohms as possible). The power loss of the reflected or returned signal is the return loss. It can be seen that impedance and return loss are strongly correlated.

[0075] To better demonstrate the SI performance of the connector disclosed in this invention, simulations were performed on conventional connectors in the prior art and connectors using the connector disclosed in this application to test the SI performance.

[0076] It should be noted that when conducting comparative simulation tests, existing simulation software and methods can be used, and will not be described in detail in this application. When conducting simulation tests, in order to ensure the accuracy of the simulation results, the signal transmission structure (signal terminal) of the connector in the prior art is different from the signal transmission structure (split-type signal terminal) of the connector described in this application, while other parameters remain the same.

[0077] The specific test results are as follows:

[0078] 1. Impedance simulation comparison

[0079] See Figure 7 and Figure 8 ,according to Figure 7 and Figure 8 It can be seen that for a typical connector, when the X coordinate is 110PS, the impedance is the low point caused by the corresponding stub, which is about 76 ohms. After reducing the redundant part of the signal terminal 105, the impedance corresponding to the X coordinate 110ps is about 86 ohms, which is closer to the target impedance of 85 ohms set by the PCIe signal system, thus reducing the low impedance point caused by the excessive length of the stub.

[0080] Here, "stub" refers to the redundant part on the terminal that does not contribute positively to signal transmission.

[0081] 2. Simulation comparison of insertion loss

[0082] See Figure 9 and Figure 10 The closer the insertion loss (Y-axis) is to 0, the better. Figure 9 and Figure 10In the middle, the shaded line at the bottom represents the standard line for PCIe signal specifications; Figure 10 The slope of the interpolation loss is significantly smaller than that of the interpolation loss. Figure 9 That is, at the same frequency (X-axis), the insertion loss value is closer to 0, and the margin is significantly larger for the specification.

[0083] 3. Comparison of simulated pullback losses

[0084] See Figure 11 and Figure 12 , Figure 11 and Figure 12 The shaded line at the top center is the standard line for PCIe signal specifications. Figure 12 The margin between the return loss and the standard line is significantly larger. Line A and Line B are the same electrical channel, and the return loss can be viewed from different ports (male and female 103). Figure 11 In the example, lines A and B are closer to the standard line. During actual production, fluctuations in the manufacturing process, coupled with a smaller return loss margin, may lead to poor signal transmission and product scrap. Figure 12 In this case, the return loss margin is significantly larger, which can reduce the scrap rate caused by poor signal transmission due to process fluctuations during production, thereby reducing the connector production cost.

[0085] In summary, in practical use, this invention can effectively improve the SI performance of connectors, reduce signal loss during connector signal transmission, improve the signal transmission quality of connectors, reduce the scrap rate of connectors during the production process, reduce connector production costs, and make connector performance more stable.

[0086] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A U2 male connector for improving SI performance, comprising a housing, wherein a plurality of signal terminals are inserted into the housing, one end for connecting to a PCB board and the other end for contacting a first signal terminal in a connector female connector to transmit signals, characterized in that: The housing includes a housing body and an extension connected to the housing body, and the extension is provided with a mounting groove. The signal terminal includes an upper terminal and a lower terminal. After the lower terminal is fixedly installed on the housing body, one end is used to connect to the PCB board, and the other end extends into the mounting groove. The upper terminal is fixedly mounted on a plastic part, and the plastic part is rotatably mounted in the mounting groove. The upper terminal is provided with a first inclined surface, and the lower terminal is provided with a second inclined surface. The housing body is equipped with a linkage mechanism, which is connected to the plastic part. When the housing is inserted into the connector female end, the female end is used to push the linkage mechanism to rotate, causing the first inclined surface and the second inclined surface to come into contact or separate. The linkage mechanism includes a first tension spring, a second tension spring, a pull rope, and a wrench. A first limit post and a second limit post are provided on the rotating shaft. The first limit post is horizontally set, and the second limit post is vertically set. One end of the first tension spring is connected to the extension, and the other end is connected to the first limit post. A pin is provided in the mounting groove, and a clearance groove is provided on the extension. The clearance groove is connected to the mounting groove. One end of the wrench is rotatably connected to the pin, and the other end passes through the clearance groove. The second tension spring is connected to the pull rope. The upper end of the pull rope is connected to the second limit post, and the lower end of the second tension spring is connected to the wrench. Under the action of the first tension spring and the second tension spring, the first inclined surface and the second inclined surface are in close contact.

2. The U2 male connector for improving SI performance according to claim 1, characterized in that: The body of the plastic shell and the extension are an integral structure.

3. The U2 male connector for improving SI performance according to claim 1, characterized in that: The upper terminal and the plastic part are integrated into a single structure through injection molding.

4. The U2 male connector for improving SI performance according to claim 1, characterized in that: The extension is provided with mounting holes that communicate with the mounting groove. The plastic part is provided with rotating shafts on both sides. The plastic part is installed in the mounting groove by rotating the rotating shafts. A linkage mechanism is connected to the rotating shafts on both sides of the plastic part.

5. The U2 male connector for improving SI performance according to claim 1, characterized in that: The mounting slot contains a first pin, and the lower end of the first tension spring is connected to the first pin.

6. The U2 male connector for improving SI performance according to claim 1, characterized in that: A limiting part is provided in the middle of the wrench, and the lower end of the second tension spring contacts the limiting part.

7. A connector, characterized in that: It includes a female terminal and a male terminal that is plugged into the female terminal, wherein the male terminal is the U2 male terminal as described in any one of claims 1-6, which facilitates the improvement of SI performance.

8. A connector according to claim 7, characterized in that: The male end has guide insertion parts at both ends of the housing body, and insertion slots are provided on the insertion parts. The female end has insertion ends corresponding to the insertion slots.

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