Connector

Abstract

The utility model discloses a connector. The connector comprises an insulating shell, a terminal module and a metal shell, the terminal module comprises at least one pair of differential signal terminals, a grounding terminal and an insulating block; each differential signal terminal comprises a contact part, an elastic part, an embedded part and a welding part which are connected in sequence; the embedded part comprises a contraction section connected with the elastic part, a first embedded section and a first exposed section; the contraction section and the first embedded section are embedded in the insulating block; wherein the width of one end, far away from the contact part, of the elastic part is W1, the width of the contraction section is W2, the width of the first embedded section is W3, and the width of the first exposed section is W4; w2 < W3 < W1, and W3 < W4. W3 is smaller than W1 and W3 is smaller than W4, primary hole shrinkage is formed to balance the characteristic impedance of the elastic part and the first exposed section exposed in the air, W2 is smaller than W3, secondary hole shrinkage is formed to locally increase the characteristic impedance of the elastic part embedded into one end of the insulating block, fluctuation change of the characteristic impedance is balanced, and the integrity of high-frequency signal transmission is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to connector technical field especially is related to a kind of connector of improving signal transmission integrity. BACKGROUND

[0002] Connector generally includes insulating shell and terminal module installed in insulating shell, and terminal module includes multiple signal terminals and insulating block covered outside signal terminal, and insulating block supports and fixes multiple signal terminals in insulating shell.Signal terminal generally includes contact portion, elastic portion, embedding portion and welding portion connected in sequence, contact portion is used to contact and pass with the terminal of compatible plug-in connector, elastic portion is used to improve the positive pressure between contact portion and plug-in connector terminal, to ensure the stability of contact and pass, embedding portion is used to embed in insulating block, to fix signal terminal relative to insulating block, and welding portion is used to be welded with cable.During the transmission of signal from elastic portion to embedding portion, dielectric constant rises due to the change of dielectric constant from air to insulating substance, and dielectric constant rises, to balance characteristic impedance fluctuation, embedding portion is narrowed in the part embedded in insulating block, to improve the characteristic impedance of the part embedded in insulating block.

[0003] Due to the above reasons, the width of elastic portion is greater than the width of embedding portion, and the signal terminal forms transition surface at the joint position of elastic portion and embedding portion, due to the limitation of injection molding process, insulating block is completely wrapped around the transition surface with width change when injection molding, and the end of elastic portion connected with transition surface is also covered by plastic, which leads to the fact that the width of signal terminal is still large at the critical position of just entering insulating block, and the medium changes from air to insulating substance, which makes the width of signal terminal large and the dielectric constant large when it just enters insulating block, and then leads to the sudden drop of characteristic impedance of signal terminal at the critical position of insulating block, affecting the integrity of high-frequency signal transmission, and cannot meet the transmission demand of higher speed of high-frequency signal.

[0004] Therefore, it is necessary to design an improved connector to overcome the above problems. UTILITY MODEL CONTENTS

[0005] In view of the problems faced by the background art, the utility model aims at providing a kind of connector, by setting the contraction section and the first embedding section embedded in the insulating block, and the contraction section width size is less than the embedding section width size to form two sections of narrowing structure, since the contraction section is connected with the elastic portion, so the contraction section can locally pull up the characteristic impedance of the elastic portion embedded in the one end position of insulating block, to solve the problem of sudden drop of characteristic impedance at the initial position of elastic portion and insulating block joint, to improve signal transmission integrity.

[0006] To achieve the above objectives, the present invention employs the following technical means:

[0007] A connector having intersecting first and second directions, the connector comprising:

[0008] An insulating shell, wherein an inner cavity is provided inside the insulating shell;

[0009] A terminal module is inserted into the inner cavity along a first direction. The terminal module includes at least one signal terminal extending along the first direction, a ground terminal arranged on one side of the signal terminal in a second direction, and an insulating block covering the outside of the signal terminal and the ground terminal. The signal terminal includes a contact portion, an elastic portion, an embedded portion, and a soldering portion sequentially connected along the first direction. The contact portion and the elastic portion are suspended outside the insulating block and enter the inner cavity. The embedded portion passes through the insulating block, and the soldering portion is exposed outside the insulating shell. The embedded portion includes a contraction section connecting the elastic portion, a first embedded section connecting the contraction section, and a first exposed section connecting the first embedded section. The contraction section and the first embedded section are both embedded in the insulating block. The insulating block has a slot corresponding to the first exposed section, and the first exposed section is exposed in the slot.

[0010] A metal shell is fitted over the outside of the insulating shell;

[0011] Wherein, the width of the end of the elastic part away from the contact part in the second direction is W1, the width of the contraction section in the second direction is W2, the width of the first embedded section in the second direction is W3, and the width of the first exposed section in the second direction is W4; then W2 < W3 < W1, W3 < W4.

[0012] Furthermore, in the first direction, the length of the contraction segment is L1, and the length of the first embedded segment is L2; ​​therefore, L2 > L1.

[0013] Furthermore, the elastic part includes a first lever arm segment connecting the contact part and a second lever arm segment connecting the first lever arm segment, and one end of the second lever arm segment connected to the contraction section is covered by the insulating block;

[0014] Two grooves are provided on the same signal terminal, and the two grooves are arranged opposite to each other on both sides of the contraction section. In the second direction, the center line of the second lever arm segment coincides with the center line of the contraction section, and the grooves on both sides are symmetrical with respect to the center line of the second lever arm segment.

[0015] Furthermore, the signal terminals are differential signal terminals, and two adjacent signal terminals are used to transmit a pair of differential signals. Two adjacent pairs of signal terminals are separated by the ground terminal. The distance between the two soldered portions of a pair of signal terminals is D1, and the distance between the two second lever segments of a pair of signal terminals is D2. Then D2 < D1.

[0016] Furthermore, a notch is provided at the end of the welding part away from the contact part, and the notch is groove-shaped and provided on one side of the signal terminal. A tail section is formed at the position of the welding part corresponding to the notch. The width of the end of the second lever segment connected to the contraction section gradually decreases.

[0017] The width of the contact portion in the second direction is W5, the width of the first lever segment in the second direction is W6, the maximum width of the second lever segment in the second direction is W1, the width of the welded portion in the second direction is W7, and the width of the finishing segment in the second direction is W8; then W5 < W8 < W7 < W1 < W6, W6 > 2W5.

[0018] Furthermore, the connector also has a third direction, wherein the first direction, the second direction, and the third direction intersect each other;

[0019] The terminal module is provided in two rows, with the signal terminals of the two terminal modules arranged side by side in the third direction. In the third direction, the contact portions of the two rows of signal terminals are staggered. When viewed from the projection along the third direction, the overlapping area of ​​the first lever arm segment of the two rows of signal terminals is greater than the overlapping area of ​​the second lever arm segment.

[0020] Furthermore, the embedding part also includes a second embedding section connected to the end of the first exposed section away from the first embedded section, and a second exposed section connected to the end of the second embedded section away from the first exposed section; the end of the second exposed section away from the second embedded section is connected to the welding part;

[0021] The width of the second embedded section in the second direction is W9, and the width of the second exposed section in the second direction is W10; therefore, W9 < W10 < W4.

[0022] Furthermore, the connector also has a third direction, wherein the first direction, the second direction, and the third direction intersect each other;

[0023] The terminal module is provided in two, and the two terminal modules are arranged side by side in the third direction. The signal terminals of the two terminal modules are differential signal terminals. Two adjacent signal terminals in the same terminal module are used to transmit a pair of differential signals. Two adjacent pairs of signal terminals are separated by the ground terminal. The ground terminal of one terminal module is aligned with the center line between a pair of signal terminals of the other terminal module in the third direction.

[0024] The grounding terminal includes a contact head and a welding tail respectively arranged at both ends, and a main body disposed between the contact head and the welding tail. The welding tail is disposed at one end of the grounding terminal near the welding part. A shrinkage groove is provided on the main body, and the shrinkage groove corresponds to the setting position of the second exposed section. The shrinkage groove is used to reduce the overlap area between the second exposed section and the main body between the two terminal modules in a third direction.

[0025] Furthermore, the number of shrinkage grooves on the same grounding terminal is two, and the two shrinkage grooves are symmetrically arranged on both sides of the main body.

[0026] Furthermore, the terminal modules are provided in pairs. After the two terminal modules are snapped together, they are assembled together into the insulating shell. One end of each insulating block is provided with a support platform exposed outside the insulating shell. The grounding terminal has a contact head that protrudes from the insulating block and enters the inner cavity and a welding tail located on the support platform. The grounding terminal also has a main body connected between the contact head and the welding tail. The welding tail and the welding part in the same terminal module are exposed on the same side of the support platform and arranged in a row. In the second direction, the welding tail is located between the welding parts of two adjacent signal terminals.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By embedding a first section within the insulating block with a width smaller than the width of the elastic portion and the first exposed section outside the insulating block, a first narrowing is formed to adjust the characteristic impedance of the elastic portion and the first exposed section exposed in the air. By setting a shrinkage section connected to the elastic portion, the width of the shrinkage section is smaller than the width of the first embedded section, a second narrowing is formed to locally increase the characteristic impedance at the position where the elastic portion is embedded in the insulating block. This solves the problem that the insulating block will wrap around the end position of the elastic portion during the injection molding process, causing a sudden drop in characteristic impedance at the initial position where the elastic portion and the insulating block are joined. This balances the fluctuation of characteristic impedance and ensures the integrity of signal transmission. Especially in the field of high-frequency signal transmission, it can meet the higher transmission speed requirements of high-frequency signals.

[0029] 2. Since the width of the contraction section is designed to balance the characteristic impedance at the initial position where the elastic part and the insulating block are joined, and the width of the first embedded section is designed to balance the characteristic impedance of the elastic part and the first exposed section exposed in the air, and the end of the elastic part is embedded in the insulating block due to the manufacturing process, the embedded distance of the end of the elastic part is relatively short. Therefore, a shorter distance for the contraction section can increase the characteristic impedance at the initial position where the elastic part and the insulating block are joined. At the same time, the length of the first embedded section is greater than the length of the contraction section, so that the first embedded section embedded in the insulating block has a longer influence distance on the characteristic impedance, which can better balance the characteristic impedance of the elastic part and the first exposed section exposed in the air, and the overall characteristic impedance fluctuation is more balanced.

[0030] 3. By aligning the centerline of the second lever arm segment with the centerline of the contraction segment, and with the grooves on both sides being symmetrical relative to the centerline of the second lever arm segment, the characteristic impedance of the contraction segment at the end position of the second lever arm segment embedded in the insulating block is more evenly increased, thereby improving the integrity of high-frequency signal transmission. Furthermore, the grooves can increase the holding force between the signal terminal and the insulating block, thereby strengthening the structural strength at the position of the contraction segment.

[0031] 4. The welding section and the second lever arm are exposed on both sides of the insulating block. Since the welding section needs to connect cables and solder, it is a point with low characteristic impedance during signal transmission. By making the spacing between the second lever arm segments smaller than the spacing between the welding sections, the spacing between the second lever arm segments is reduced, the inter-board capacitance is increased, and the characteristic impedance is reduced, thus balancing the characteristic impedance at the welding section. This allows the impedance to remain balanced even when the conductive medium changes, resulting in smoother fluctuations in characteristic impedance and improved integrity of high-frequency signal transmission.

[0032] 5. Since the soldered part connects to the cable, and the contact part abuts against the mating connector terminals, and the cable has a shielding layer and thus a lower characteristic impedance compared to the mating connector, the width of the soldered part is greater than the width of the contact part. This reduces the characteristic impedance difference between the soldered part and the cable, and between the contact part and the mating connector, thereby balancing characteristic impedance fluctuations. Because the signal transmission thickness doubles after the contact part abuts against the mating connector terminals, the first lever arm connecting to the contact part needs to be wider than the contact part itself. Considering the deformation of the contact part upon contact with the connector terminals, the signal terminal will be more gently supported, effectively increasing the cross-sectional area and reducing characteristic impedance. Furthermore, the contact area between the gently supported signal terminal and the connector terminals also increases. Considering electrical coupling, the width of the first lever arm needs to be more than twice the width of the contact part. By making the width of the second lever arm less than the width of the first lever arm, the characteristic impedance of the signal terminal is increased before it penetrates the insulating block, thus balancing the decrease in characteristic impedance when embedded within the insulating block, resulting in more stable overall characteristic impedance fluctuations. When the soldering part is soldered to the signal line in the cable, the shielding layer is peeled off. Therefore, there will be a certain gap between the shielding layer and the end of the soldering part. The signal line in this gap lacks the protection of the shielding layer, forming a point of high characteristic impedance. By setting a termination section at the end of the soldering part to first raise the characteristic impedance, the fluctuation of characteristic impedance at the gap position is made smoother, thereby improving the integrity of signal transmission.

[0033] 6. By making the overlapping area of ​​the first lever arm segment of the two rows of signal terminals larger than that of the second lever arm segment, the facing area of ​​the second lever arm segment is smaller, the inter-board capacitance at the second lever arm segment is smaller and the characteristic impedance is larger. By increasing the characteristic impedance at the second lever arm segment, the situation where the characteristic impedance embedded in the insulating block will decrease is balanced, thereby making the fluctuation of characteristic impedance more stable and improving the integrity of high-frequency signal transmission.

[0034] 7. The second exposed section is located on the side closer to the welding part, and the first exposed section is located on the side closer to the contact part. Compared with the contact part, the welding part has a lower characteristic impedance. By reducing the width of the second exposed section, the characteristic impedance is increased, thereby raising the characteristic impedance of the welding part, making the overall characteristic impedance fluctuation more stable, and improving the transmission effect of high-frequency signals.

[0035] 8. By reducing the overlap area between the second exposed section and the main body, and reducing the area of ​​the second exposed section facing the grounding terminals, the characteristic impedance at the location of the second exposed section can be increased, further raising the characteristic impedance of the welded part, making the relative change of characteristic impedance between the welded part and the contact part more stable, and improving the transmission effect of high-frequency signals.

[0036] 9. By symmetrically arranging shrinkage grooves on both sides of the main body, and with the main body positioned at the center between a pair of signal terminals, the influence of the main body on the two signal terminals is balanced, thereby improving the high-frequency signal transmission effect. [Attached Image Description]

[0037] Figure 1 This is a schematic diagram of the connector structure according to the first embodiment of the present invention;

[0038] Figure 2 for Figure 1 Cross-sectional view at position AA;

[0039] Figure 3 for Figure 1 Exploded view of the connector;

[0040] Figure 4 for Figure 1 Schematic diagram of the middle terminal module;

[0041] Figure 5 for Figure 4 A schematic diagram of the structure of a pair of signal terminals;

[0042] Figure 6 for Figure 1 A schematic diagram of the structure hidden behind the metal shell, insulating shell, and insulating block;

[0043] Figure 7 A schematic diagram of the test results for the signal terminal SCD21, which does not have a contraction section in the prior art;

[0044] Figure 8 This is a schematic diagram of the test results of the signal terminal SCD21 after the contraction section is set in this embodiment.

[0045] Explanation of reference numerals in the accompanying drawings for specific embodiments:

[0046] 100, connector 1, insulating shell 15, inner cavity 2, terminal module 21, signal terminal 211, contact portion 212, elastic portion 2121, first force arm segment 2122, second force arm segment 213, embedding portion 2131, first embedding segment 2132, first exposed segment 2133, second embedding segment 2134, second exposed segment 2135, contraction segment 2136, groove 214, welding portion 2145, notch 2146, end segment 22, ground terminal 221, contact head 222, welding tail 223, main body 225, contraction groove 23, insulating block 231, support platform 235, slotted 3, metal shell X, first direction Y, second direction Z, third direction [Specific Implementation Examples]

[0047] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0053] It should be noted that, according to Figures 1 to 6 As shown, in this embodiment of the invention, the X-axis, Y-axis, and Z-axis intersect each other in pairs. For ease of explanation, the first direction is defined as the X-axis, the second direction as the Y-axis, and the third direction as the Z-axis. In this embodiment, the X-axis and Y-axis are coplanar and perpendicular to each other, and the Z-axis is perpendicular to the common plane of the X and Y axes. The first, second, and third directions are mutually perpendicular. Further explanation: the term "parallel" in this application includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering, such as "parallel" referring to an angle of -1° to 1° between lines, lines and surfaces, or surfaces. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering, such as "perpendicular" referring to an angle of 89° to 91° between lines, lines and surfaces, or surfaces. Equal distances or equal angles include not only absolute equality, but also approximate equality as commonly understood in engineering, which means there can be a certain degree of error, such as a tolerance range of -1% to 1%.

[0054] Please see Figures 1 to 6 The connector 100 of the first embodiment of this utility model includes an insulating shell 1, a terminal module 2 assembled inside the insulating shell 1, and a metal shell 3 sleeved on the outside of the insulating shell 1. The insulating shell 1 is used to form a mating space for a compatible mating connector. When the connector 100 is mated with the compatible mating connector, the terminal module 2 is connected to the terminals of the compatible mating connector to transmit signals. The metal shell 3 is sleeved on the outside of the insulating shell 1 to shield external electromagnetic interference and improve the integrity of signal transmission.

[0055] Please see Figures 1 to 3 The insulating shell 1 is an insulating component. The insulating shell 1 has a hollow ring structure. An inner cavity 15 is provided inside the insulating shell 1. The inner cavity 15 extends through both ends of the insulating shell 1 along the first direction. One end of the inner cavity 15 is used for the insertion of a matching mating connector, and the other end of the inner cavity 15 is used for the installation of the terminal module 2.

[0056] Please see Figures 1 to 6The terminal module 2 is inserted into the inner cavity 15 along a first direction. The terminal module 2 includes at least one signal terminal 21 extending along the first direction, a ground terminal 22 arranged on one side of the signal terminal 21 in a second direction, and an insulating block 23 covering the outside of the signal terminal 21 and the ground terminal 22. The signal terminal 21 is used to abut against a mating connector terminal for signal transmission. In this embodiment, the signal terminal 21 is a differential signal terminal. Two adjacent signal terminals 21 are used to transmit a pair of differential signals. Differential signals refer to signals transmitted in the two signal terminals 21 with opposite phases. The signal receiving end takes the difference between the signals with opposite phases to cancel out external interference, thereby ensuring the integrity of high-frequency signal transmission. Two adjacent pairs of signal terminals 21 are separated by a ground terminal 22 to shield electromagnetic interference between adjacent pairs of signal terminals 21, thereby reducing crosstalk and ensuring the integrity of high-frequency transmission. In this embodiment, the terminal module 2 includes two pairs of signal terminals 21 and multiple other functional terminals. In other embodiments, the signal terminal 21 can also be a single-ended signal terminal. Each signal terminal 21 is arranged independently, meaning each terminal transmits a single-ended signal independently. Adjacent signal terminals 21 are separated by a grounding terminal 22, which shields against electromagnetic interference between adjacent terminals. Therefore, when transmitting differential signals, the signal terminals 21 are arranged in pairs; when transmitting single-ended signals, they are arranged independently. Both arrangements fall within the scope of this invention. This embodiment describes the transmission of differential signals with a more complex arrangement; the single-ended arrangement will not be elaborated further.

[0057] The insulating block 23 is an insulating material component. The insulating block 23 abuts against the inner wall of the insulating shell 1 to support and fix the signal terminal 21 and the grounding terminal 22 inside the insulating shell 1. In this embodiment, two terminal modules 2 are provided. After the two terminal modules 2 are snapped together, they are assembled together into the insulating shell 1. The two terminal modules 2 are arranged side by side in the third direction. The signal terminals 21 of the two terminal modules 2 are differential signal terminals. Two adjacent signal terminals 21 in the same terminal module 2 are used to transmit a pair of differential signals. Two adjacent pairs of signal terminals 21 are separated by a grounding terminal. After the insulating blocks 23 of the two terminal modules 2 are spliced ​​together in the third direction, they are inserted into the inner cavity 15 in the first direction. One end of each insulating block 23 is provided with a support platform 231 exposed outside the insulating shell 1. The support platform 231 is used to support the external cables for welding the signal terminal 21 and the grounding terminal 22.

[0058] The signal terminal 21 includes a contact portion 211, an elastic portion 212, an embedded portion 213, and a solder portion 214 connected sequentially along a first direction. The contact portion 211 and the elastic portion 212 are suspended outside the insulating block 23 and enter the inner cavity 15. The contact portion 211 is used to abut against the mating connector terminal for conduction. The elastic portion 212 is bent at a certain angle to increase the positive pressure at the abutment position of the contact portion 211 and the mating connector terminal, thereby improving the stability of conduction. The end position of the elastic portion 212 connected to the embedded portion 213 is covered by the insulating block 23. The embedded portion 213 passes through the insulating block 23. The solder portion 214 is located on the support platform 231 and is exposed on the outside of the insulating shell 1. The solder portion 214 is used for soldering with external cables.

[0059] The elastic portion 212 includes a first lever arm segment 2121 and a second lever arm segment 2122 connected to the first lever arm segment 2121. One end of the first lever arm segment 2121 is connected to the contact portion 211; the second lever arm segment 2122 is located at the end of the elastic portion 212 away from the contact portion 211, and is connected to the end of the first lever arm segment 2121 away from the contact portion 211. The end of the second lever arm segment 2122 away from the first lever arm segment 2121 is connected to the embedded portion 213, and the end of the second lever arm segment 2122 connected to the embedded portion 213 is covered by an insulating block 23. In this embodiment, the bending position can be set on the first lever arm segment 2121 and / or the second lever arm segment 2122. By setting the bending position on the first lever arm segment 2121 and / or the second lever arm segment 2122, elastic pressure is provided to press the contact portion 211 against the matching mating connector terminal. One of the first lever arm segment 2121 and the second lever arm segment 2122 is provided with a bending position, or both the first lever arm segment 2121 and the second lever arm segment 2122 are provided with bending positions. It is understood that there is no limitation on the specific setting position and number of bending positions, as long as it is ensured that elastic pressure can be provided to press the contact portion 211 against the matching mating connector terminal for high-frequency signal transmission.

[0060] The embedded part 213 includes a contraction section 2135 connecting to the elastic part 212, a first embedded section 2131 connecting the contraction section 2135 away from the elastic part 212, and a first exposed section 2132 connecting the first embedded section 2131 away from the elastic part 212. The contraction section 2135 is disposed between the second lever arm section 2122 and the first embedded section 2131. Both the contraction section 2135 and the first embedded section 2131 are embedded in the insulating block 23. The width of the second lever arm section 2122 gradually decreases at the end connected to the contraction section 2135. The first exposed section 2132 is connected to the end of the first embedded section 2131 away from the contraction section 2135. The first exposed section 2132 is exposed on the insulating block 23. When the insulating block 23 is injection molded outside the signal terminal 21, the first exposed section 2132 is used for mold clamping and fixing to fix the signal terminal 21 in the injection mold. Understandably, during injection molding, the terminals of the same terminal module 2 are first arranged along the second direction and then placed into the injection mold. The mold clamps the terminals in the same terminal module 2 at the positions corresponding to the first exposed section 2132, thereby fixing the terminals in the same terminal module 2 together in the injection mold. Then, the insulating block 23 is injection molded to uniformly cover and fix the terminals. In this embodiment, the embedded part 213 also includes a second embedded section 2133 connected to the end of the first exposed section 2132 away from the first embedded section 2131, and a second exposed section 2134 connected to the end of the second embedded section 2133 away from the first exposed section 2132. The second embedded section 2133 is embedded in the insulating block 23, and the second exposed section 2134 is exposed on the insulating block 23. Thus, the first exposed section 2132 and the second exposed section 2134 form two clamping and fixing positions on the signal terminal 21. That is, when each terminal of the same terminal module 2 is fixed in the injection mold, the positions of the first exposed section 2132 and the second exposed section 2134 are clamped at the same time, which improves the stability of each terminal fixed in the injection mold, avoids the terminal being punched out of shape during injection, improves the processing accuracy, and at the same time ensures the parallelism between a pair of signal terminals 21, reducing the crosstalk effect of the signal terminals 21 during the transmission of high-frequency signals. Furthermore, a slot 235 is provided at the position of the first exposed section 2132 and the second exposed section 2134 of the insulating block 23. The slot 235 extends through the upper and lower sides of the insulating block 23 in a third direction. The slot 235 is the clamping position of the injection mold. The first exposed section 2132 and the second exposed section 2134 are exposed in the slot 235 for the injection mold to clamp and fix them.

[0061] The welding portion 214 connects to the end of the second exposed section 2134 away from the second embedded section 2133. The welding portion 214 is exposed on the outside of the insulating shell 1 for welding external cables. A notch 2145 is provided at the end of the welding portion 214 away from the contact portion 211. The notch 2145 is groove-shaped and located on one side of the signal terminal 21. A tail section 2146 is formed at the location of the welding portion 214 corresponding to the notch 2145. In this embodiment, the signal terminal 21 is a differential signal terminal. The notch 2145 is located on the side of a pair of signal terminals 21 that are close to each other. Since the tail section 2146 is formed by opening the notch 2145 in the welding portion 214, the width of the tail section 2146 is smaller than the width of the welding portion 214. The tail section 2146 is located at the end of the signal terminal 21. When the welding part 214 is welded to the signal line in the cable, the shielding layer will be peeled off. Therefore, there will be a certain gap between the shielding layer and the end of the welding part 214. The signal line in the gap lacks the shielding layer and forms a high point of characteristic impedance. By setting the end section 2146 at the end of the welding part 214 to first raise the characteristic impedance, the fluctuation of characteristic impedance at the gap position is made smoother, thereby improving the integrity of signal transmission.

[0062] Please see Figures 2 to 6In the second direction, the width of the contact portion 211 is W5, the width of the first lever arm segment 2121 is W6, the maximum width of the second lever arm segment 2122 is W1, the width of the welding portion 214 is W7, and the width of the tail segment 2146 is W8; therefore, W5 < W8 < W7 < W1 < W6, and W6 > 2W5. The welding portion 214 is connected to the cable, and the contact portion 211 abuts against the terminals of the compatible mating connector. Because the cable has a shielding layer, the signal transmission is more stable. Therefore, the cable has a lower characteristic impedance compared to the mating connector 100. Thus, the width of the welding portion 214 is greater than the width of the contact portion 211 (i.e., W5 < W8 < W7), making the characteristic impedance difference between the welding portion 214 and the cable smaller, and the characteristic impedance difference between the contact portion 211 and the mating connector 100 smaller, thereby balancing the fluctuation of characteristic impedance. Since the thickness of the contact portion 211 doubles at the contact position after it abuts against the mating connector terminal (the thickness of the contact portion 211 + the thickness of the mating connector terminal), the first lever arm segment 2121 connected to the contact portion 211 needs to be wider than the width of the contact portion 211. Considering that the contact portion 211 deforms when it abuts against the mating connector 100 terminal, the signal terminal 21 will be supported more gently, which is equivalent to an increase in cross-sectional area and a decrease in characteristic impedance. The contact area between the supported signal terminal 21 and the mating connector 100 terminal will also increase. Considering the case of electrical coupling, the width of the first lever arm segment 2121 needs to be more than twice the width of the contact portion 211 (i.e., W6 > 2W5) to balance the characteristic impedance at the position of the contact portion 211 and the position of the first lever arm segment 2121 in the connected state. By making the width of the second lever segment 2122 smaller than the width of the first lever segment 2121 (i.e., W1 < W6), the characteristic impedance at the position of the second lever segment 2122 is increased before being embedded into the insulating block 23. This balances the characteristic impedance, which decreases as the dielectric constant increases from air to insulating material when embedded in the insulating block 23. By increasing the characteristic impedance at the position of the second lever segment 2122 before embedding into the insulating block 23, the overall fluctuation of the characteristic impedance becomes more stable. Furthermore, the signal terminals 21 of the two terminal modules 2 are arranged in two rows in the third direction. In the third direction, the contact portions 211 of the two rows of signal terminals 21 are staggered. Observing the projection along the third direction, the overlapping area of ​​the first lever segment 2121 of the signal terminals 21 of the two rows of modules is greater than the overlapping area of ​​the second lever segment 2122. This makes the area of ​​the second lever segment 2122 facing each other between the signal terminals 21 of the two terminal modules 2 smaller, so the inter-board capacitance at the second lever segment 2122 is smaller and the characteristic impedance is larger, thus raising the characteristic impedance at the second lever segment 2122. This balances the situation where the characteristic impedance embedded in the insulating block 23 will decrease, thereby making the fluctuation of the characteristic impedance more stable and improving the integrity of high-frequency signal transmission.

[0063] In the second direction, the width of the contraction section 2135 is W2, the width of the first embedded section 2131 is W3, and the width of the first exposed section 2132 is W4; then W2 < W3, W3 < W1, W3 < W4. The width of the first embedded section 2131, which is embedded in the insulating block 23, is smaller than the widths of the second lever arm section 2122 and the first exposed section 2132 exposed outside the insulating block 23 (i.e., W3 < W1 and W3 < W4), forming a narrowing to balance the characteristic impedance of the second lever arm section 2122 and the first exposed section 2132 exposed in the air. Because the second lever arm section 2122 needs to be narrowed as it extends to the first embedded section 2131, a gradually narrowing transition surface is provided at the end of the second lever arm section 2122 near the first embedded section 2131. However, the limitations of the injection molding process prevent the end face of the insulating block 23 from being placed on the transition surface with varying width. Therefore, the end of the second lever arm section 2122 near the first embedded section 2131 needs to be embedded in the insulating block 23 to ensure that the insulating block 23 completely covers the transition surface with varying width. In other words, the second lever arm section 2122 connects to the narrowing section. One end of 2135 is covered by insulating block 23. As a result, the width of the second lever arm segment 2122 at the initial position where it joins the insulating block 23 has not yet begun to narrow, but the medium suddenly changes from air to insulating material. This causes a sudden drop in characteristic impedance at the initial position where the second lever arm segment 2122 joins the insulating block 23. By setting a shrinkage segment 2135 connected to the second lever arm segment 2122, the width of the shrinkage segment 2135 is smaller than the width of the first embedded segment 2131 (i.e., W2 < W3), a secondary narrowing is formed to locally increase the characteristic impedance at the end position of the second lever arm segment 2122 embedded in the insulating block 23. This solves the problem that the insulating block 23 will cover the end position of the second lever arm segment 2122 during the injection molding process, causing a sudden drop in characteristic impedance at the initial position where the second lever arm segment 2122 joins the insulating block 23. This balances the fluctuation of characteristic impedance and ensures the integrity of high-frequency signal transmission.

[0064] Furthermore, in the first direction, the length of the contraction segment 2135 is L1, and the length of the first embedded segment 2131 is L2; ​​then L2 > L1. Since the width of the contraction zone is designed to balance the characteristic impedance at the initial position where the second lever arm segment 2122 and the insulating block 23 are joined, and the width of the first embedded segment 2131 is designed to balance the characteristic impedance of the second lever arm segment 2122 and the first exposed segment 2132 exposed in the air, and the end of the second lever arm segment 2122 is embedded into the insulating block 23 at a relatively short distance due to manufacturing process reasons, the shorter distance of the contraction segment 2135 is sufficient to meet the requirement of raising the characteristic impedance at the initial position where the second lever arm segment 2122 and the insulating block 23 are joined, and the length of the first embedded segment 2131 is greater than the length of the contraction segment 2135, the first embedded segment 2131 embedded in the insulating block 23 has a longer influence distance on the characteristic impedance, which can better balance the characteristic impedance of the second lever arm segment 2122 and the first exposed segment 2132 exposed in the air, and the overall characteristic impedance fluctuation is more balanced. Furthermore, two grooves 2136 are provided on the same signal terminal 21. The two grooves 2136 are arranged opposite to each other on both sides of the contraction section 2135. The grooves 2136 make the contraction section 2135 form a narrowing structure. In the second direction, the center line of the second lever arm section 2122 coincides with the center line of the contraction section 2135, and the grooves 2136 on both sides are symmetrical with respect to the center line of the second lever arm section 2122. This design ensures that the constriction section 2135 provides a more balanced increase in the characteristic impedance at the end of the second lever arm segment 2122 embedded in the insulating block 23, thereby improving the integrity of high-frequency signal transmission. Furthermore, the groove 2136 enhances the holding force between the signal terminal 21 and the insulating block 23. Since the width of the second lever arm segment 2122 is smaller than that of the first lever arm segment 2121, the internal stress load during elastic deformation of the elastic part 212 will be more concentrated at the less hard second lever arm segment 2122. By providing the groove 2136, the holding force between the second lever arm segment 2122 and the insulating block 23 is improved, thereby enhancing the connection reliability between the second lever arm segment 2122 and the insulating block 23. This reduces the impact of concentrated internal stress load on the strength of the second lever arm segment 2122 and extends the service life of the signal terminal 21.

[0065] In the second direction, the width of the second embedded section 2133 is W9, and the width of the second exposed section 2134 is W10; therefore, W9 < W10 < W4. Compared to the first exposed section 2134, the second exposed section 2134 is located closer to the soldering part 214, while the first exposed section 2132 is located closer to the contact part 211. Since the soldering part 214 needs to connect solder and cables, its thickness is greater than that of the contact part 211. Therefore, the soldering part 214 has a lower characteristic impedance than the contact part 211. The second exposed section 2134 is located on the side of the first exposed section 2132 closer to the soldering part 214. Because the width of the second exposed section 2134 is smaller than that of the first exposed section 2132 (i.e., W10 < W4), the characteristic impedance at the second exposed section 2134 is higher than that at the first exposed section 2132. This increases the characteristic impedance of the soldering part 214, making the overall characteristic impedance fluctuation more stable and improving the transmission effect of high-frequency signals. The width of the second embedded section 2133 is smaller than the width of the second exposed section 2134 and the first exposed section 2132 at both ends (i.e., W9 < W10 < W4). The principle is the same as that the width of the first embedded section 2131 is smaller than the width of the second lever section 2122 and the first exposed section 2132. Because the second embedded section 2133 is embedded in the insulating material, while the second exposed section 2134 and the first exposed section 2132 at both ends are exposed to the air, the dielectric constant of the second embedded section 2133 is higher and the characteristic impedance is lower. By narrowing the second embedded section 2133, the characteristic impedance at the position of the second embedded section 2133 can be increased, thereby balancing the characteristic impedance fluctuation caused by the change in dielectric constant and improving the transmission integrity of high-frequency signals.

[0066] When transmitting differential signals, the distance between the two solder parts 214 of a pair of signal terminals 21 is D1, and the distance between the two second lever arms 2122 of a pair of signal terminals 21 is D2; therefore, D2 < D1. Since the embedded part 213 passes through the insulating block 23, and the two ends of the embedded part 213 are respectively connected to the second lever arm 2122 and the solder part 214, the second lever arm 2122 and the solder part 214 are arranged opposite to each other on both sides of the insulating block 23. Since the solder part 214 needs to connect cables and solder, the solder part 214 is a point with low characteristic impedance during signal transmission. By making the spacing between the second lever arms 2122 smaller than the spacing between the solder parts 214, the spacing between the second lever arms 2122 is reduced, the inter-board capacitance is increased, and the characteristic impedance is reduced, thereby balancing the characteristic impedance at both sides of the insulating block 23. This makes the impedance of the signal entering and exiting the insulating block 23 more balanced, the fluctuation of the characteristic impedance more stable, and improves the integrity of high-frequency signal transmission.

[0067] Two terminal modules 2 are arranged at a distance in a third direction. When transmitting differential signals, the grounding terminal 22 of one terminal module 2 is aligned with the center line between a pair of signal terminals 21 of the other terminal module 2 along the third direction. The grounding terminal 22 includes a contact head 221 and a solder tail 222 respectively arranged at both ends, and a main body 223 disposed between the contact head 221 and the solder tail 222. The contact head 221 protrudes from the insulating block 23 and enters the inner cavity 15. The contact head 221 is used to abut against the terminals of a mating connector. The contact head 221 corresponds to the position of the contact portion 211. The solder tail 222 is disposed at one end of the grounding terminal 22 near the solder portion 214. The solder tail 222 is located on the support platform 231 and is used to connect with the ground in the cable. The welding tail 222 is exposed on the outside of the insulating shell 1. The welding tail 222 and welding portion 214 in the same terminal module 2 are exposed on the same side of the support platform 231 and arranged in a row. The welding tail 222 and welding portion 214 are spaced apart along a second direction. In this second direction, the welding tail 222 is located between the welding portions 214 of two adjacent signal terminals 21. Understandably, since the signal terminals 21 in this embodiment are arranged in pairs to transmit differential signals, the welding tail 222 is correspondingly located between the welding portions 214 of two adjacent pairs of signal terminals 21. The main body 223 passes through the insulating block 23, and its two ends are respectively connected to the contact head 221 and the welding tail 222. The main body 223 is provided with a shrinkage groove 225. The shrinkage groove 225 corresponds to the position of the second exposed section 2134. The shrinkage groove 225 is used to reduce the overlap area between the second exposed section 2134 and the main body 223 in the third direction, so as to reduce the direct area at the position of the second exposed section 2134, thereby increasing the characteristic impedance at the position of the second exposed section 2134. This makes the relative change of characteristic impedance between the welding part 214 and the contact part 211 more stable, and improves the transmission effect of high-frequency signals. In this embodiment, two shrinkage grooves 225 are provided on the same grounding terminal 22. The two shrinkage grooves 225 are symmetrically arranged on both sides of the main body 223. The main body 223 is aligned with the center line between a pair of signal terminals 21 in the third direction. The symmetrically arranged shrinkage grooves 225 can balance the influence of the grounding terminal 22 on the two signal terminals 21, and improve the transmission effect of high-frequency signals.

[0068] In the same terminal module 2, when transmitting differential signals, the distance between the two solder joints 214 of a pair of signal terminals 21 is D1, and the distance between the solder tail 222 of the ground terminal 22 and the solder joint 214 of the adjacent signal terminal 21 is D3; therefore, D3 < D1. Since the characteristic impedance of the solder joints 214 of the signal terminals 21 decreases after being soldered to the cable with solder, by increasing the spacing between the solder joints 214 of the two signal terminals 21, the spacing between the solder joints 214 of a pair of signal terminals 21 becomes greater than the distance between the solder joint 214 and the solder tail 222 of the ground terminal 22, thereby increasing the characteristic impedance at the solder joints 214 of the signal terminals 21, balancing the fluctuation of the characteristic impedance curve, and improving the integrity of high-frequency signal transmission.

[0069] Please see Figures 1 to 3 The metal shell 3 is arranged around the outside of the insulating shell 1. The metal shell 3 is made of a metal plate bent into a ring structure and sleeved on the outside of the insulating shell 1. The metal shell 3 is used to shield the electromagnetic interference received in the inner cavity 15 area to ensure the integrity of signal transmission. In addition, the metal shell 3 can improve the load-bearing strength of the outer wall of the insulating shell 1, increase the number of plugging and unplugging of the connector 100 and the matching mating connector, and extend the service life.

[0070] Please see Figure 7 The figure shows the test results for the signal terminal SCD21, which is not equipped with the contraction section 2135 in the prior art. SCD21 is a differential-to-common-mode test. The smaller the measured value of the differential-to-common-mode signal and the farther it is from the standard line, the better the signal transmission integrity. As can be seen from the figure, the differential-to-common-mode signal in the prior art at 7.46GHz is -19.46, which exceeds the standard line, causing the test to fail to meet the standard requirements and resulting in poor signal integrity. Please refer to [link to relevant documentation]. Figure 8 The figure shows the SCD21 test results of the signal terminal after setting the contraction section 2135 in this embodiment. It can be seen from the figure that the differential to common mode curves are all below the standard line in the 0 to 25 GHz range, which meets the standard requirements. It can be seen that by setting the contraction section 2135 between the elastic part 212 and the first embedded section 2131 to adjust the characteristic impedance, the integrity of signal transmission is effectively improved.

[0071] In summary, this utility model provides a connector 100, which has the following advantages compared with the prior art:

[0072] 1. By embedding the first embedded section 2131 within the insulating block 23 with a width smaller than the width of the elastic portion 212 and the first exposed section 2132 exposed outside the insulating block 23, a first narrowing is formed to adjust the characteristic impedance of the elastic portion 212 and the first exposed section 2132 exposed in the air. By setting a contraction section 2135 connected to the elastic portion 212, the width of the contraction section 2135 being smaller than the width of the first embedded section 2131, a second narrowing is formed to locally increase the characteristic impedance at one end of the elastic portion 212 embedded in the insulating block 23. This solves the problem that the insulating block 23 will wrap around the end of the elastic portion 212 during the injection molding process, causing a sudden drop in characteristic impedance at the initial position where the elastic portion 212 and the insulating block 23 are joined. This balances the fluctuation of characteristic impedance and ensures the integrity of signal transmission. Especially in the field of high-frequency signal transmission, it can meet the higher transmission speed requirements of high-frequency signals.

[0073] 2. Since the width of the contraction section 2135 is designed to balance the characteristic impedance at the initial position where the elastic part 212 and the insulating block 23 are joined, and the width of the first embedded section 2131 is designed to balance the characteristic impedance of the elastic part 212 and the first exposed section 2132 exposed in the air, and the end of the elastic part 212 is embedded in the insulating block 23 due to the manufacturing process, the embedded distance of the end of the elastic part 212 is relatively short. Therefore, the contraction section 2135 can be set with a shorter distance to increase the characteristic impedance at the initial position where the elastic part 212 and the insulating block 23 are joined. At the same time, the length of the first embedded section 2131 is greater than the length of the contraction section 2135, so that the first embedded section 2131 embedded in the insulating block 23 has a longer influence distance on the characteristic impedance, which can better balance the characteristic impedance of the elastic part 212 and the first exposed section 2132 exposed in the air, and the overall characteristic impedance fluctuation is more balanced.

[0074] 3. By aligning the centerline of the second lever arm segment 2122 with the centerline of the contraction segment 2135, and with the grooves 2136 on both sides symmetrical about the centerline of the second lever arm segment 2122, the characteristic impedance of the contraction segment 2135 at the end position of the second lever arm segment 2122 embedded in the insulating block 23 is increased more evenly, thus improving the integrity of high-frequency signal transmission. Furthermore, the grooves 2136 can increase the holding force between the signal terminal 21 and the insulating block 23, thereby strengthening the structural strength at the position of the contraction segment 2135.

[0075] 4. The welding part 214 and the second lever arm segment 2122 are exposed on both sides of the insulating block 23. Since the welding part 214 needs to connect the cable and the solder, the welding part 214 is a point with low characteristic impedance during signal transmission. By making the spacing between the second lever arm segments 2122 smaller than the spacing between the welding parts 214, the spacing between the second lever arm segments 2122 is reduced, the inter-board capacitance is increased, and the characteristic impedance is reduced, so that the characteristic impedance at the welding part 214 is balanced. This allows the impedance to be adjusted and balanced even when the conductive medium changes, the fluctuation of the characteristic impedance is more stable, and the integrity of high-frequency signal transmission is improved.

[0076] 5. Since the soldering part 214 is connected to the cable and the contact part 211 abuts against the matching plug connector terminal, and the cable has a shielding layer and has a lower characteristic impedance compared to the plug connector 100, the width of the soldering part 214 is greater than the width of the contact part 211, so that the characteristic impedance difference between the soldering part 214 and the cable is smaller, and the characteristic impedance difference between the contact part 211 and the plug connector 100 is smaller, thereby balancing the fluctuation of characteristic impedance. Since the thickness of the signal transmission doubles after the contact portion 211 abuts against the mating connector terminal, the first lever arm segment 2121 connected to the contact portion 211 needs to be wider than the contact portion 211. Considering the deformation of the contact portion 211 upon contact with the mating connector 100 terminal, the signal terminal 21 will be supported more gently, effectively increasing the cross-sectional area and reducing the characteristic impedance. Furthermore, the contact area between the gently supported signal terminal 21 and the mating connector 100 terminal will also increase. Considering electrical coupling, the width of the first lever arm segment 2121 needs to be more than twice the width of the contact portion 211. By making the width of the second lever arm segment 2122 smaller than the width of the first lever arm segment 2121, the characteristic impedance of the signal terminal 21 is increased before it penetrates the insulating block 23, thereby balancing the decrease in characteristic impedance when embedded in the insulating block 23, resulting in a more stable overall characteristic impedance fluctuation. When the welding part 214 is welded to the signal line in the cable, the shielding layer will be peeled off. Therefore, there will be a certain gap between the shielding layer and the end of the welding part 214. The signal line in the gap lacks the shielding layer and forms a high point of characteristic impedance. By setting the end section 2146 at the end of the welding part 214 to first raise the characteristic impedance, the fluctuation of characteristic impedance at the gap position is made smoother, thereby improving the integrity of signal transmission.

[0077] 6. Because the overlapping area of ​​the first lever arm segment 2121 of the two rows of signal terminals 21 is greater than the overlapping area of ​​the second lever arm segment 2122, the facing area of ​​the second lever arm segment 2122 is smaller, the inter-plate capacitance at the second lever arm segment 2122 is smaller, and the characteristic impedance is larger. By increasing the characteristic impedance at the second lever arm segment 2122, the situation where the characteristic impedance embedded in the insulating block 23 will decrease is balanced, thereby making the fluctuation of characteristic impedance more stable and improving the integrity of high-frequency signal transmission.

[0078] 7. The second exposed section 2134 is located on the side close to the welding part 214, and the first exposed section 2132 is located on the side close to the contact part 211. The welding part 214 has a lower characteristic impedance than the contact part 211. By reducing the width of the second exposed section 2134, the characteristic impedance is increased, thereby raising the characteristic impedance of the welding part 214, making the overall characteristic impedance fluctuation more stable, and improving the transmission effect of high-frequency signals.

[0079] 8. By reducing the overlap area between the second exposed section 2134 and the main body 223, the area of ​​the second exposed section 2134 facing each other between the grounding terminals 22 is reduced, which can also increase the characteristic impedance at the position of the second exposed section 2134, further increase the characteristic impedance of the welding part 214, and make the relative change of characteristic impedance between the welding part 214 and the contact part 211 more stable, thereby improving the transmission effect of high frequency signals.

[0080] 9. By symmetrically arranging shrinkage grooves 225 on both sides of the main body 223, and the main body 223 being located at the center between a pair of signal terminals 21, the influence of the main body 223 on the two signal terminals 21 is balanced, thereby improving the high-frequency signal transmission effect.

[0081] 10. Since the characteristic impedance of the solder part 214 of the signal terminal 21 will decrease after being soldered to the cable with solder, by increasing the spacing between the solder parts 214 of the two signal terminals 21, the spacing between the solder parts 214 of a pair of signal terminals 21 is made greater than the distance between the solder part 214 and the solder tail 222 of the ground terminal 22, thereby increasing the characteristic impedance at the solder part 214 of the signal terminal 21, balancing the fluctuation of the characteristic impedance curve, and improving the integrity of high-frequency signal transmission.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A connector having intersecting first and second directions, characterized in that, The connector includes: An insulating shell, wherein an inner cavity is provided inside the insulating shell; A terminal module is inserted into the inner cavity along a first direction. The terminal module includes at least one signal terminal extending along the first direction, a ground terminal arranged on one side of the signal terminal in a second direction, and an insulating block covering the outside of the signal terminal and the ground terminal. The signal terminal includes a contact portion, an elastic portion, an embedded portion, and a solder portion sequentially connected along the first direction. The contact portion and the elastic portion are suspended outside the insulating block and enter the inner cavity. The embedded portion passes through the insulating block, and the solder portion is exposed outside the insulating shell. The embedded portion includes a contraction section connecting the elastic portion, a first embedded section connecting the contraction section, and a first exposed section connecting the first embedded section. The contraction section and the first embedded section are both embedded in the insulating block. The insulating block has a slot corresponding to the first exposed section, and the first exposed section is exposed in the slot. A metal shell is fitted over the outside of the insulating shell; Wherein, the width of the end of the elastic part away from the contact part in the second direction is W1, the width of the contraction section in the second direction is W2, the width of the first embedded section in the second direction is W3, and the width of the first exposed section in the second direction is W4; then W2 < W3 < W1, W3 < W4.

2. The connector according to claim 1, characterized in that, In the first direction, the length of the contraction segment is L1, and the length of the first embedded segment is L2; ​​then L2 > L1.

3. The connector according to claim 1, characterized in that, The elastic part includes a first lever arm segment connecting the contact part and a second lever arm segment connecting the first lever arm segment, and one end of the second lever arm segment connected to the contraction section is covered by the insulating block; Two grooves are provided on the same signal terminal, and the two grooves are arranged opposite to each other on both sides of the contraction section. In the second direction, the center line of the second lever arm segment coincides with the center line of the contraction section, and the grooves on both sides are symmetrical with respect to the center line of the second lever arm segment.

4. The connector according to claim 3, characterized in that, The signal terminals are differential signal terminals. Two adjacent signal terminals are used to transmit a pair of differential signals. Two adjacent pairs of signal terminals are separated by the ground terminal. The distance between the two soldered portions of a pair of signal terminals is D1, and the distance between the two second lever segments of a pair of signal terminals is D2. Then D2 < D1.

5. The connector according to claim 4, characterized in that, The welding part has a notch at one end away from the contact part. The notch is groove-shaped and located on one side of the pair of signal terminals that are close to each other. The welding part forms a tapering section at the position corresponding to the notch. The width of the second lever segment gradually decreases at one end that connects to the contraction section. The width of the contact portion in the second direction is W5, the width of the first lever segment in the second direction is W6, the maximum width of the second lever segment in the second direction is W1, the width of the welded portion in the second direction is W7, and the width of the finishing segment in the second direction is W8; then W5 < W8 < W7 < W1 < W6, W6 > 2W5.

6. The connector according to claim 5, characterized in that, The connector also has a third direction, wherein the first direction, the second direction, and the third direction intersect each other; The terminal module is provided in two rows, with the signal terminals of the two terminal modules arranged side by side in the third direction. In the third direction, the contact portions of the two rows of signal terminals are staggered. When viewed from the projection along the third direction, the overlapping area of ​​the first lever arm segment of the two rows of signal terminals is greater than the overlapping area of ​​the second lever arm segment.

7. The connector according to claim 1, characterized in that, The embedded part further includes a second embedded section connected to the end of the first exposed section away from the first embedded section, and a second exposed section connected to the end of the second embedded section away from the first exposed section; the end of the second exposed section away from the second embedded section is connected to the welding part; The width of the second embedded section in the second direction is W9, and the width of the second exposed section in the second direction is W10; therefore, W9 < W10 < W4.

8. The connector according to claim 7, characterized in that, The connector also has a third direction, wherein the first direction, the second direction, and the third direction intersect each other; The terminal module is provided in two, and the two terminal modules are arranged side by side in the third direction. The signal terminals of the two terminal modules are differential signal terminals. Two adjacent signal terminals in the same terminal module are used to transmit a pair of differential signals. Two adjacent pairs of signal terminals are separated by the ground terminal. The ground terminal of one terminal module is aligned with the center line between a pair of signal terminals of the other terminal module in the third direction. The grounding terminal includes a contact head and a welding tail respectively arranged at both ends, and a main body disposed between the contact head and the welding tail. The welding tail is disposed at one end of the grounding terminal near the welding part. A shrinkage groove is provided on the main body, and the shrinkage groove corresponds to the setting position of the second exposed section. The shrinkage groove is used to reduce the overlap area between the second exposed section and the main body between the two terminal modules in a third direction.

9. The connector according to claim 8, characterized in that, Two shrinkage grooves are provided on the same grounding terminal, and the two shrinkage grooves are symmetrically arranged on both sides of the main body.

10. The connector according to claim 1, characterized in that, The terminal modules are provided in pairs. The two terminal modules are snapped together and assembled into the insulating shell. One end of each insulating block is provided with a support platform exposed outside the insulating shell. The grounding terminal has a contact head that protrudes from the insulating block and enters the inner cavity and a welding tail located on the support platform. The grounding terminal also has a main body connected between the contact head and the welding tail. The welding tail and the welding part in the same terminal module are exposed on the same side of the support platform and arranged in a row. In the second direction, the welding tail is located between the welding parts of two adjacent signal terminals.

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