Cable connector

Abstract

The invention discloses a cable connector which comprises an insulating base, a first terminal strip, a second terminal strip, a metal shell and a cable. The insulating seat is provided with an exposed supporting table, and the first terminal strip and the second terminal strip respectively comprise at least one pair of differential signal terminals and grounding terminals; the cable comprises a core wire group, and the core wire group comprises a signal conductor and a grounding conductor. Wherein the supporting table is provided with a plurality of accommodating channels between the first terminal strip and the second terminal strip in a penetrating manner; the signal conductor is electrically connected with the differential signal terminal on one side of the supporting table, and the grounding conductor is bent to enter one of the accommodating channels and is electrically connected with the grounding terminal on the other side of the supporting table. The grounding conductors are directly arranged in the lateral direction of the differential signal terminals, the electromagnetic shielding effect between the two adjacent pairs of differential signal terminals is improved, the electromagnetic shielding effect of the first terminal row and the second terminal row is improved, electromagnetic interference in the signal transmission process is reduced, and high-frequency signal transmission stability is guaranteed.

Description

[Technical field]

[0001] The present invention relates to the technical field of cable connectors, and in particular to a cable connector capable of improving the electromagnetic shielding effect of a welding point. [Background technology]

[0002] Connectors are usually divided into line-end connectors and board-end connectors. The line-end connector and the board-end connector are plugged in and matched with each other to realize the electrical connection of two active devices. The line-end connector usually includes an insulating seat, a terminal block passing through the insulating seat, and a cable electrically connected to the terminal block; the insulating seat is provided with a support platform for supporting the terminal block, and the terminal block and the cable are welded and fixed on the support platform, thereby electrically connecting the cable and the terminal block. When engaged with the matching board-end connector, the terminal blocks in the two connectors are in contact and connected with each other to ensure the transmission of current or signal. In order to avoid the cable connector from being too large in width, the support platform will be provided with terminal blocks on both sides of the upper and lower sides of the support platform, so that the arrangement of each terminal block is more compact. The terminal block usually includes a plurality of signal terminals arranged in sequence and a ground terminal arranged on one side of the signal terminal. The ground terminal reduces the electromagnetic interference between the signals and ensures the transmission of high-frequency signals. The cable usually includes a plurality of core wire groups, and the core wire group usually includes a signal wire welded to the signal terminal, a ground wire welded to the ground terminal, and a shielding layer and an insulating layer wrapped around the outside of the signal wire and the ground wire.

[0003] When existing cables are welded to terminal blocks, in order to shield the upper and lower rows of terminal blocks, the signal wire and ground wire of the same core wire group will be connected to the signal terminal and ground terminal on both sides of the support platform respectively, so as to ensure the shielding height after the ground wire is connected to the ground terminal, and realize the electromagnetic shielding of the upper and lower terminal rows. However, the ground wire can only be arranged behind the support platform when crossing the support platform, so the two terminal rows will still be subject to greater electromagnetic interference and crosstalk.

[0004] Therefore, it is necessary to design an improved cable connector to overcome the above problems. [Summary of the invention]

[0005] In view of the problems faced by the background technology, the purpose of the present invention is to provide a cable connector, by setting a plurality of accommodating grooves through a support platform between a first terminal row and a second terminal row, the grounding conductor of the ground wire is bent into one of the accommodating grooves and electrically connected to the second welding portion, so that the ground wire is embedded in the accommodating groove and arranged between the two terminal rows, so as to solve the problems of large electromagnetic interference and large crosstalk between the first terminal row and the second terminal row; at the same time, the ground wire is embedded in the accommodating groove and arranged on the side of the signal terminal, which can also improve the electromagnetic shielding effect between adjacent signal terminals.

[0006] To achieve the above purpose, the present invention adopts the following technical means:

[0007] A cable connector has a first direction and a second direction intersecting each other, the cable connector comprising:

[0008] An insulating seat, wherein the insulating seat is provided with an exposed supporting platform, and the supporting platform has a first side and a second side opposite to each other in a second direction;

[0009] A first terminal row and a second terminal row, wherein the first terminal row and the second terminal row are provided with the insulating seat along a first direction, and the first terminal row and the second terminal row are arranged on the first side and the second side of the support platform respectively; the first terminal row and the second terminal row each include at least one signal terminal and a ground terminal arranged on one side of the signal terminal; a first welding portion is provided at one end of the signal terminal close to the support platform, and a second welding portion is provided at one end of the ground terminal close to the support platform, the first welding portion and the second welding portion of the first terminal row are exposed on the first side of the support platform, the first welding portion and the second welding portion of the second terminal row are exposed on the second side of the support platform, and the second welding portion of the first terminal row and the second welding portion of the second terminal row are staggered;

[0010] A metal shell covering the insulating seat;

[0011] A cable electrically connecting the first terminal row and the second terminal row; the cable comprises an outer sheath and at least two core wire groups located in the outer sheath; the core wire group comprises a signal wire, a ground wire, a shielding layer wrapped outside the signal wire and the ground wire, and an insulating layer wrapped outside the shielding layer; one end of the signal wire is exposed outside the shielding layer and the insulating layer to form a signal conductor, and one end of the ground wire is exposed outside the shielding layer and the insulating layer to form a grounding conductor;

[0012] Among them, the support platform is provided with a plurality of accommodating grooves passing through along the second direction between the first terminal row and the second terminal row, and the ends of the plurality of second welding parts of the first terminal row and the second terminal row are respectively exposed in the plurality of accommodating grooves in a one-to-one correspondence; the signal conductor of the same core wire group is electrically connected to the first welding part located on the first side or the second side of the support platform, and the grounding conductor is bent into one of the accommodating grooves and electrically connected to the second welding part located on the second side or the first side of the support platform.

[0013] In one embodiment, the signal conductor extends linearly along a first direction, and the grounding conductor includes a bending portion and a fixing portion; the bending portion is in a strip shape and extends along a second direction, the bending portion is embedded in the accommodating groove, and the fixing portion extends from the bending portion toward the corresponding second welding portion along the first direction and is welded and fixed to the second welding portion, and the bending portion is electrically coupled to the end of the corresponding second welding portion.

[0014] In one embodiment, the cable connector has a third direction, and the first direction, the second direction and the third direction intersect each other;

[0015] The signal terminals on the first terminal row are differential signal terminals, and the signal terminals on the second terminal row are differential signal terminals, and the ground terminal is arranged on one side of a pair of the signal terminals;

[0016] Each of the core wire groups includes two of the signal wires and one of the ground wires; the ground conductor of the ground wire in the same core wire group is located at the center between the signal conductors of the two signal wires in the third direction, the two signal conductors and one of the ground conductors in the same core wire group are arranged in an isosceles triangle shape, and at least two of the core wire groups are arranged in parallel with each other along the third direction;

[0017] In a first direction, a length dimension of the first welding portion is greater than a length dimension of the second welding portion.

[0018] In one embodiment, a plurality of the accommodating grooves are respectively disposed between the two first welding portions of each pair of the signal terminals;

[0019] A notch is provided at the end of the first welding portion close to the supporting platform, and the notch is located at a side of the first welding portion close to the accommodating groove.

[0020] In one of the embodiments, at least two overflow grooves are provided on the support platform; each of the overflow grooves is in the shape of a strip groove extending along the first direction, and a plurality of the overflow grooves are relatively arranged on both sides of the first welding part and / or the second welding part; each of the overflow grooves is connected to the corresponding accommodating channel.

[0021] In one embodiment, the cable connector has a third direction, and the first direction, the second direction and the third direction intersect each other;

[0022] The accommodating channel comprises a near-ground section and a far-ground section; the near-ground section is arranged at one end of the accommodating channel close to the second welding portion, and the far-ground section is arranged at one end of the accommodating channel far from the second welding portion, and the near-ground section is connected to the far-ground section;

[0023] In the third direction, the width dimension of the near segment is greater than the width dimension of the far segment.

[0024] In one of the embodiments, in the first direction, the depression depth of the near segment is not equal to the depression depth of the far segment.

[0025] In one of the embodiments, two side walls of the remote section are provided with inclined guide surfaces, and the inclined guide surfaces on both sides are inclinedly arranged with the spacing gradually increasing in the direction approaching the cable.

[0026] In one embodiment, the insulating seat includes an insulating shell, a first insulating block and a second insulating block assembled in the insulating shell; the first insulating block and the second insulating block are spliced ​​along a second direction, and one of the near-ground section and the far-ground section of the same accommodating groove is arranged on the first insulating block, and the other is arranged on the second insulating block.

[0027] In one embodiment, the insulating seat includes an insulating shell, a first insulating block and a second insulating block assembled in the insulating shell; the first insulating block covers the first terminal row, and the second insulating block covers the second terminal row;

[0028] The signal terminal comprises a contact portion, a bending portion, a contraction section, an embedded section, an exposed section and a first welding portion connected in sequence along a first direction; the bending portion extends out of the first insulating block or the second insulating block, the exposed section is exposed in an opening correspondingly provided in the first insulating block or the second insulating block, and the contraction section and the embedded section are both embedded in the first insulating block or the second insulating block;

[0029] Wherein, in the third direction, the width of the contracted section is smaller than the width of the embedded section, the width of the embedded section is smaller than the width of the end of the bent portion away from the contact portion, and the width of the embedded section is smaller than the width of the exposed section.

[0030] In one embodiment, a buckle is provided at one end of the metal shell close to the support platform, the insulating seat is inserted into the metal shell along a first direction, a slot is provided at a position of the insulating seat corresponding to the buckle, the buckle is bent into the slot, and the metal shell is fixedly connected to the insulating seat;

[0031] A convex rib is convexly arranged on the outer side surface of the insulating seat, the convex rib is in a long strip shape and extends along a first direction, and the convex rib abuts against the inner side surface of the metal shell.

[0032] In one embodiment, the minimum distance between the shielding layer and the end of the first welding portion is 0.1 mm to 0.24 mm.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. By providing a plurality of accommodating grooves along the second direction between the first terminal row and the second terminal row on the support platform, and the grounding conductor of the ground wire is bent into one of the accommodating grooves and electrically connected to the second welding portion located on the support platform, the ground wire can be bent and embedded in the accommodating groove when crossing from one side of the support platform to the other side, so that the grounding conductor is directly arranged on the side of the signal terminal, thereby improving the electromagnetic shielding effect between adjacent signal terminals, and also improving the electromagnetic shielding effect between the first terminal row and the second terminal row, reducing the electromagnetic interference received during signal transmission, reducing crosstalk, and ensuring the stability of high-frequency signal transmission. In addition, by embedding the grounding conductor of the ground wire into the accommodating groove of the support platform, the space occupied by the grounding conductor between the support platform and the shielding layer of the cable is reduced, thereby reducing the exposed length of the signal wire and the ground wire between the shielding layer and the support platform, improving the electromagnetic shielding effect of the welding area between the plug connector and the cable, further reducing the electromagnetic interference received during signal transmission, reducing crosstalk, and ensuring the stability of high-frequency signal transmission.

[0035] 2. The bent portion extends along the second direction and is embedded in the accommodating groove, the fixed portion extends from the bent portion toward the second welding portion along the first direction and is welded and fixed to the second welding portion, the bent portion is electrically coupled with the end of the second welding portion, and the fixed portion and the second welding portion are directly contacted to transmit signals, and the bent portion and the end of the second welding portion can transmit signals in an electrically coupled manner even if there is a small gap, thereby increasing the signal transmission area and improving the high-frequency signal transmission effect. In addition, the bent portion extends in the second direction to improve the electromagnetic shielding effect of the first terminal row and the second terminal row in the second direction, and the bent portion is embedded in the accommodating groove while the fixed portion extends in the first direction, thereby improving the electromagnetic shielding effect between two adjacent pairs of signal terminals in the first direction, thereby reducing the electromagnetic interference received during signal transmission, reducing crosstalk, and ensuring the stability of high-frequency signal transmission.

[0036] 3. By making the length dimension of the first welding portion greater than the length dimension of the second welding portion in the first direction, the first welding portion and the second welding portion are arranged front to back in the first direction. When welding the core wire group of the cable, the setting position of the second welding portion of the grounding terminal can be clearly and easily identified, thereby achieving rapid positioning during the welding and wiring process and improving assembly efficiency.

[0037] 4. By setting a notch at the end of the first welding part away from the insulating shell, and setting the notch in a groove shape on the side of the first welding part close to the accommodating groove, the first welding part is prevented from protruding into the accommodating groove to cause damage to the signal terminal and the ground wire. By setting a notch on the side of the first welding part close to the accommodating groove to avoid the position, the yield rate of bending the ground wire and embedding it into the accommodating groove structure is guaranteed. In addition, a groove-shaped notch is set at the end of the signal terminal, so that the end of the first welding part away from the insulating shell is narrowed. Since there is a gap between the end of the first welding part and the shielding layer, the signal conductor is exposed at the gap position to form a characteristic impedance peak point. The characteristic impedance at the end of the first welding part is raised by the narrowing structure, so that the fluctuation of the characteristic impedance at the gap position is smoother, thereby improving the integrity of signal transmission.

[0038] 5. The overflow trough is used to receive the tin material overflowed during welding to prevent the signal terminals or the signal terminals and the ground terminals from being short-circuited by the tin material. The overflow trough is used to accommodate the overflowed tin material to ensure the welding quality and improve the welding yield rate.

[0039] 6. The fixed part is welded to the second welding part, and the bending part is bent at a certain angle with the fixed part. Therefore, when welding the fixed part to the second welding part, the bending part will have a certain drainage effect on the overflowed tin material. By dividing the accommodating groove into two parts, the near-ground section and the far-ground section, the width dimension of the near-ground section in the third direction is greater than the width dimension of the far-ground section, and the accommodating capacity of the tin material at the ground wire bending part of the accommodating groove corresponding to the ground wire is increased, thereby solving the influence of the bending part on the drainage of the tin material, reducing the risk of the overflowed tin liquid of the grounding conductor passing through the accommodating groove to flow to the opposite side of the support platform and the signal conductor, and ensuring the welding quality. And because the width dimension of the near-ground section is greater than the width dimension of the far-ground section, a blocking surface will be formed at one end of the far-ground section close to the near-ground section, and the blocking surface can effectively block the tin material on the side wall of the near-ground section from flowing into the far-ground section, thereby preventing the first side and the second side from being connected by the tin material, and improving the welding quality.

[0040] 7. By making the depression depth of the near section and the depression depth of the far section in the first direction unequal, a depth difference of different heights is formed in the accommodating groove in the first direction. When the liquid tin flows to the depth difference, due to the surface tension of the tin, the tin will gather at the depth difference and be difficult to continue flowing, thereby increasing the resistance of the tin flowing through the joint position of the near section and the far section, preventing the first side and the second side from being connected by the tin, and improving the welding quality.

[0041] 8. By setting inclined guide surfaces on both side walls of the remote section, the inclined guide surfaces on both sides are inclined with a gradually increasing spacing from close to the insulating shell to away from the insulating shell, making it easier for the bent portion to be embedded in the accommodating groove, thereby improving assembly efficiency.

[0042] 9. By bending the end of the ground wire exposed on the outside of the shielding layer and embedding it into the accommodating groove, the distance between the shielding layer and the supporting platform is 0.1 mm to 0.24 mm, which greatly improves the electromagnetic shielding effect of the welding area. In the field of high-frequency transmission, the distance between the shielding layer and the supporting platform is controlled at 0.1 mm to 0.24 mm, which can reduce the crosstalk of high-frequency signals in the welding area and ensure the stability of high-frequency signal transmission.

Brief Description of the Drawings

[0043] Figure 1 It is a schematic structural diagram of a cable connector according to a first embodiment of the present invention;

[0044] Figure 2 for Figure 1 An enlarged schematic diagram of the middle circle A portion;

[0045] Figure 3 for Figure 1 A schematic cross-sectional view at the AA position in the middle;

[0046] Figure 4 for Figure 1 A schematic cross-sectional view at the middle BB position;

[0047] Figure 5 for Figure 1 Schematic diagram of the exploded structure of the cable connector;

[0048] Figure 6 for Figure 1 A schematic cross-sectional view of a cable connector;

[0049] Figure 7 for Figure 1 Schematic diagram of the structure behind the hidden metal shell and cables;

[0050] Figure 8 for Figure 7 An enlarged schematic diagram of the middle circle B portion;

[0051] Fig. 9 for Figure 7 A schematic diagram of the structure from another perspective after the metal shell and cables are hidden;

[0052] Fig.10 for Figure 7 Schematic diagram of the structure of the signal terminal;

[0053] Fig.11 for Figure 1 Schematic diagram of the cable structure;

[0054] Fig.12 It is a schematic diagram of the test results of the signal terminal SCD21 without a contraction section in the prior art;

[0055] Fig.13It is a schematic diagram of the test results of the signal terminal SCD21 after the contraction section is set in this embodiment.

[0056] Description of the accompanying drawings of the specific embodiments:

[0057]

[0058] [Specific embodiment]

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0065] It should be noted that according to Figures 1 to 11 As shown, in the embodiment of the present invention, the X-axis direction, the Y-axis direction and the Z-axis direction intersect each other; for the convenience of explanation, the first direction is defined as the X-axis direction, the second direction is defined as the Y-axis direction, and the third direction is defined as the Z-axis direction. In this embodiment, the X-axis direction and the Y-axis direction are coplanar and relatively perpendicular to each other, and the Z-axis direction is relatively perpendicular to the common plane of the X-axis and the Y-axis. The first direction, the second direction, and the third direction are relatively perpendicular to each other. Further explanation, the term "vertical" in this application includes not only the absolute vertical situation, but also the roughly vertical situation conventionally recognized in engineering, such as "vertical" refers to the state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the absolutely equal situation, but also the roughly equal situation conventionally recognized in engineering, that is, there is a certain error, such as the state where the tolerance range is between -1% and 1%.

[0066] See also Figures 1 to 11, is a cable connector 100 of the first embodiment of the present invention, which is used for plugging and connecting with an adapter board connector to transmit signals between the cable connector 100 and the adapter board connector; the cable connector 100 includes an insulating seat 1, a first terminal row 2C and a second terminal row 2D passing through the insulating seat 1 along a first direction, a metal shell 3 covering the insulating seat 1, and a cable 4 electrically connecting the first terminal row 2C and the second terminal row 2D. The insulating seat 1 is used to support and fix the first terminal row 2C and the second terminal row 2D. The insulating seat 1 is provided with an exposed support platform 14, and the support platform 14 has a first side 141 and a second side 142 opposite to each other in the second direction. The first terminal row 2C and the second terminal row 2D are arranged on the first side 141 and the second side 142 of the support platform 14, respectively. The first terminal row 2C is partially exposed on the first side 141, and the second terminal row 2D is partially exposed on the second side 142. The exposed areas of the first terminal row 2C and the second terminal row 2D are used to electrically connect with the cable 4. The first terminal row 2C and the second terminal row 2D each include at least one signal terminal 21 and a ground terminal 22 arranged on one side of the signal terminal 21; a first welding portion 214 is provided at one end of the signal terminal 21 close to the support platform 14, and a second welding portion 221 is provided at one end of the ground terminal 22 close to the support platform 14. The first welding portion 214 and the second welding portion 221 of the first terminal row 2C are exposed on the first side 141 of the support platform 14, and the first welding portion 214 and the second welding portion 221 of the second terminal row 2D are exposed on the second side 142 of the support platform 14. The second welding portion 221 of the first terminal row 2C and the second welding portion 221 of the second terminal row 2D are staggered, and the staggered setting here means that, viewed from the projection along the second direction, the projection of the second welding portion 221 in the first terminal row 2C and the projection of the second welding portion 221 in the second terminal row 2D do not overlap, and the projection of the second welding portion 221 of the first terminal row 2C and the projection of the second welding portion 221 of the second terminal row 2D are arranged at intervals in the third direction. The support platform 14 is provided with a plurality of accommodating grooves 15 penetrating along the second direction between the first terminal row 2C and the second terminal row 2D, and the ends of the plurality of second welding portions 221 of the first terminal row 2C and the second terminal row 2D are exposed in the plurality of accommodating grooves 15 in a one-to-one correspondence.

[0067] The cable 4 includes an outer sheath 41 and at least two core wire groups 42 located in the outer sheath 41. The core wire group 42 includes a signal line, a ground line, a shielding layer 423 wrapped around the outside of the signal line and the ground line, and an insulating layer 424 wrapped around the outside of the shielding layer 423. One end of the signal line is exposed outside the shielding layer 423 and the insulating layer 424 to form a signal conductor 421, and one end of the ground line is exposed outside the shielding layer 423 and the insulating layer 424 to form a ground conductor 422. The signal conductor 421 and the ground conductor 422 of the same core wire group 42 are respectively connected to the first side 141 and the second side 142 of the support platform 14, that is, the signal conductor 421 of the same core wire group 42 is electrically connected to the first welding portion 214 located on the first side 141 or the second side 142 of the support platform 14, and the ground conductor 422 is bent into one of the accommodating grooves 15 and electrically connected to the second welding portion 221 located on the second side 142 or the first side 141 of the support platform 14. By bending the grounding conductor 422 and embedding it into the accommodating groove 15 when crossing the support platform 14, the grounding conductor 422 is embedded between adjacent signal terminals 21 and between the first terminal row 2C and the second terminal row 2D, and then electrically connected to the grounding terminal 22 through the grounding conductor 422, the electromagnetic shielding effect between adjacent signal terminals 21 and between the first terminal row 2C and the second terminal row 2D is improved, the electromagnetic interference to the signal during transmission is reduced, and the crosstalk is reduced, thereby ensuring the stability of high-frequency signal transmission.

[0068] For further information, see Figures 1 to 6 The insulating seat 1 includes an insulating shell 11, a first insulating block 12 and a second insulating block 13 assembled in the insulating shell 11. Furthermore, the insulating shell 11 is a hollow ring structure, and an inner cavity 115 is provided in the insulating shell 11. The inner cavity 115 penetrates both sides of the insulating shell 11 along the first direction. One end of the inner cavity 115 is used for inserting the first insulating block 12 and the second insulating block 13, and the other end of the inner cavity 115 is used for inserting the external adapter board connector, so that the first terminal row 2C and the second terminal row 2D are connected to the adapter board connector in the inner cavity 115 to ensure signal transmission. In this embodiment, the insulating shell 11 is an integral injection molding structure.

[0069] Furthermore, the first insulating block 12 and the second insulating block 13 are spliced ​​together along the second direction, and the spliced ​​first insulating block 12 and the second insulating block 13 are inserted into the inner cavity 115 along the first direction, and a limiting groove 135 is formed at the joint position of the first insulating block 12 and the second insulating block 13, and the limiting groove 135 is arranged in a groove shape at one end of the first insulating block 12 and the second insulating block 13 inserted into the inner cavity 115. A limit strip 111 is arranged in the insulating shell 11. The limit strip 111 is in the shape of a long strip and extends along the third direction. Both ends of the limit strip 111 are fixedly connected to the inner wall of the inner cavity 115. The limit strip 111 is inserted into the limit groove 135. The limit strip 111 abuts the first insulating block 12 and / or the second insulating block 13 in the first direction. Since the first insulating block 12 and the second insulating block 13 cooperate with each other, the limit strip 111 can stop the movement of the first insulating block 12 and the second insulating block 13 by abutting against one of the first insulating block 12 and the second insulating block 13. It can be understood that the limit strip 111 can also abut against the first insulating block 12 and the second insulating block 13 at the same time to achieve blocking. Here, the way in which the limit strip 111 blocks the first insulating block 12 and the second insulating block 13 in the first direction is not restricted, and it is ensured that the limit strip 111 can stop and locate the installation position of the first insulating block 12 and the second insulating block 13 in the first direction. The limit strip 111 is supported between the first insulating block 12 and the second insulating block 13 in the second direction, so that the limit strip 111 can simultaneously stop and limit the first insulating block 12 and the second insulating block 13 in the first direction and the second direction, thereby ensuring the assembly accuracy of the first insulating block 12 and the second insulating block 13. At the same time, the limit strip 111 can realize synchronous limiting in two directions with one component, so that the structure is simpler and the processing cost is reduced.

[0070] For further information, see Figures 1 to 9The first insulating block 12 is wrapped around the outside of the first terminal row 2C, and the second insulating block 13 is wrapped around the outside of the second terminal row 2D. The first insulating block 12 is used to support and fix the first terminal row 2C, and the second insulating block 13 is used to support and fix the second terminal row 2D. The first terminal row 2C and the second terminal row 2D pass through the first insulating block 12 and the second insulating block 13 respectively along the first direction and are partially protruded into the inner cavity 115. The parts of the first terminal row 2C and the second terminal row 2D protruding into the inner cavity 115 are used to be electrically connected to the adapter board end connector to ensure signal transmission between the cable connector 100 and the adapter board end connector. In this embodiment, the first insulating block 12 and the second insulating block 13 are partially inserted into the inner cavity 115, and the other parts of the first insulating block 12 and the second insulating block 13 are exposed outside the insulating shell 11. The support platform 14 is composed of the parts of the first insulating block 12 and the second insulating block 13 exposed outside the insulating shell 11. The support platform 14 is located on the side of the insulating seat 1 away from the metal shell 3. The support platform 14 is in the shape of a long strip and extends along the third direction. The support platform 14 has a first side 141 and a second side 142 opposite to each other in the second direction. The first welding portion 214 and the second welding portion 221 of the first terminal row 2C are exposed on the first side 141, and the first welding portion 214 and the second welding portion 221 of the second terminal row 2D are exposed on the second side 142. The first side 141 and the second side 142 are used for welding the exposed first welding portion 214 and the second welding portion 221 of the core wire group 42.

[0071] Furthermore, the accommodating groove 15 is disposed on a side of the support platform 14 away from the insulating shell 11 , the accommodating groove 15 is recessed toward the inside of the support platform 14 in the first direction, and the accommodating groove 15 passes through the first side 141 and the second side 142 on both sides along the second direction. The signal wire of the same core wire group 42 is connected to the signal terminal 21 located on the first side 141 or the second side 142, and the ground wire of the same core wire group 42 is connected to the ground terminal 22 located on the second side 142 or the first side 141 on the other side, so that the signal conductor 421 and the ground conductor 422 are respectively connected to the first side 141 and the second side 142. When the ground conductor 422 of the ground wire extends from one side across the support platform 14 to the other side, the ground conductor 422 can be embedded in the accommodating groove 15 in the first direction when it is bent and crosses the support platform 14, thereby reducing the distance occupied by the ground conductor 422 between the support platform 14 and the shielding layer 423, thereby reducing the spacing between the shielding layer 423 and the support platform 14, reducing the length of the signal wire exposed outside the shielding layer 423, improving the electromagnetic shielding effect of the welding area, reducing the electromagnetic interference to the signal during transmission, thereby reducing crosstalk, and ensuring the stability of high-frequency signal transmission.

[0072] Further, the accommodating channel 15 includes a near-ground section 151 and a far-ground section 152. The near-ground section 151 is arranged at one end of the second welding portion 221 of the accommodating channel 15 close to the ground line, and the far-ground section 152 is arranged at one end of the second welding portion 221 of the accommodating channel 15 far from the ground line. The near-ground section 151 is connected to the far-ground section 152, and both the near-ground section 151 and the far-ground section 152 are in the shape of a strip groove extending along the second direction, and the accommodating channel 15 is formed by the near-ground section 151 and the far-ground section 152. In this embodiment, in the third direction, the width dimension of the near-ground section 151 is greater than the width dimension of the far-ground section 152. Since the near-ground section 151 is located near the welding position between the grounding conductor 422 and the second welding portion 221, and the grounding conductor 422 is welded to the second welding portion 221 after being bent, the tin material will melt into liquid and have fluidity during the welding process, and the bending portion of the grounding conductor 422 has a drainage effect on the liquid tin material. By making the width of the near-ground section 151 larger than the width of the far-ground section 152, the tin material accommodation capacity of the accommodating groove 15 corresponding to the bending portion of the ground wire is increased, the influence of the bending portion of the grounding conductor 422 on the drainage of the tin material is solved, and the risk of the tin liquid overflowing from the grounding conductor 422 passing through the accommodating groove 15 and flowing to the opposite side signal conductor 421 is reduced, thereby improving the welding quality. In addition, the width of the near segment 151 is greater than that of the far segment 152, so that the distance between the two side walls of the far segment 152 in the third direction is smaller, and thus a blocking surface 156 is formed at one end of the far segment 152 close to the near segment 151. The blocking surface 156 is parallel to the common surface of the first direction and the third direction. The blocking surface 156 is used to block the liquid tin material flowing from the near segment 151 to the far segment 152, thereby preventing the first side 141 and the second side 142 on both sides from being connected by the tin material, thereby ensuring the welding quality.

[0073] Furthermore, on the common surface of the second direction and the third direction, the center line of the distant segment 152 is collinear with the center line of the near segment 151, and the two side surfaces of the distant segment 152 are closer to the center line than the two side surfaces of the near segment 151, thereby ensuring that the blocking surfaces 156 on both sides of the distant segment 152 are symmetrically centered, so that the tin liquid is blocked more evenly on the two side surfaces of the near segment 151, thereby improving the blocking effect of the tin liquid and further improving the welding quality.

[0074] Furthermore, in the first direction, the depression depth of the near-land section 151 is not equal to the depression depth of the far-land section 152, so that the bottom surface of the near-land section 151 and the bottom surface of the far-land section 152 are arranged in a staggered manner in the first direction. Due to the different depression depths of the near-land section 151 and the far-land section 152, there is a depth difference at the joint position of the near-land section 151 and the far-land section 152. When the tin material flows along the bottom surface of the accommodating groove 15, there are two situations when the liquid tin material flows through the depth difference position. When the liquid tin material flows from the low-level surface to the high-level surface, it will be directly blocked and cannot continue to flow; and when the liquid tin material flows from the high-level surface to the low-level surface, under the action of the surface tension of the tin material, the liquid tin material will gather at the depth difference position and it is difficult to continue to flow. Therefore, both situations will cause the liquid tin to be unable to flow smoothly along the bottom surface of the accommodating groove 15. Therefore, the different depths of the depressions of the near-ground section 151 and the far-ground section 152 increase the resistance of the tin at the junction of the near-ground section 151 and the far-ground section 152, thereby preventing the first side 141 and the second side 142 on both sides from being connected by the tin, thereby ensuring the welding quality. In this embodiment, the two side walls of the far-ground section 152 are provided with inclined guide surfaces 155. The inclined guide surfaces 155 on both sides are arranged on the side of the far-ground section 152 close to the cable 4, and the inclined guide surfaces 155 on both sides are arranged with the spacing gradually increasing in the direction close to the cable 4, so that during the installation process, the bend of the grounding conductor 422 can be more easily embedded in the accommodating groove 15 through the inclined guide surfaces 155, thereby improving the installation efficiency.

[0075] Further, one of the near-ground section 151 and the far-ground section 152 of the same accommodating groove 15 is arranged on the first insulating block 12, and the other is arranged on the second insulating block 13. Since the width and depth dimensions of the near-ground section 151 and the far-ground section 152 are different, by respectively arranging the near-ground section 151 and the far-ground section 152 of different sizes on the first insulating block 12 and the second insulating block 13, it is ensured that when processing the accommodating groove 15 with a variable width and thickness dimension, the through grooves with constant width and thickness dimensions can be processed on the first insulating block 12 and the second insulating block 13 respectively, and then when the first insulating block 12 and the second insulating block 13 are assembled, the two through grooves are butted against each other to obtain the accommodating groove 15 with a variable dimension, thereby reducing the processing difficulty of the accommodating groove 15, improving the processing efficiency of the accommodating groove 15 with a variable dimension, and reducing the processing cost.

[0076] Furthermore, at least two overflow grooves 16 are provided on the support platform 14. The overflow grooves 16 are in the shape of strip grooves extending along the first direction, and are provided on the first side 141 and the second side 142 on both sides of the support platform 14. A plurality of overflow grooves 16 are relatively arranged on both sides of the first welding portion 214 and / or the second welding portion 221, and each overflow groove 16 is connected to the corresponding accommodating channel 15. The overflow grooves 16 are used to accommodate the tin material overflowing from the first welding portion 214 and / or the second welding portion 221 during the welding process. By accommodating the overflowed tin material, the overflowed tin material is prevented from conducting the adjacent terminals on the same side, affecting the normal use of the cable connector 100, and ensuring the welding quality; and by the overflow grooves 16 being connected to the accommodating channel 15, the capacity of the overflow grooves 16 to accommodate the tin material is increased, further ensuring the welding quality, and improving the welding yield rate.

[0077] Furthermore, the signal terminal 21 on the first terminal row 2C is a differential signal terminal, and the signal terminal 21 on the second terminal row 2D is a differential signal terminal. The signal terminals on the first terminal row 2C are arranged in pairs, and the signal terminals 21 on the second terminal row 2D are arranged in pairs, that is, a pair of signal terminals 21 is arranged between two adjacent grounding terminals 22 on each of the first terminal row 2C and the second terminal row 2D, and the two signal terminals 21 form a pair to transmit differential signals. The differential signal refers to the signals transmitted in the two signal terminals 21 with opposite phases. The signal receiving end takes the difference of the signals with opposite phases, which can offset the interference amount generated by the outside world on the signal, thereby ensuring the integrity of the high-frequency signal transmission. The grounding terminal 22 is arranged on one side of a pair of signal terminals 21, and the grounding terminal 22 shields the electromagnetic interference between the two adjacent pairs of signal terminals 21. In this embodiment, the first terminal row 2C and the second terminal row 2D each include two pairs of signal terminals 21 and a plurality of other functional terminals. It can be understood that the signal terminal 21 can also be a single-ended signal terminal. The signal terminal 21 is arranged in a single manner, that is, a signal terminal 21 is arranged between two adjacent grounding terminals 22 on each of the first terminal row 2C and the second terminal row 2D. Each signal terminal 21 independently performs single-ended signal transmission. At this time, the grounding terminal 22 shields the electromagnetic interference between two adjacent signal terminals 21. When transmitting differential signals, each signal terminal 21 is arranged in pairs, and when transmitting single-ended signals, each signal terminal 21 is arranged independently. Both arrangements belong to the protection scope of the present invention. This embodiment is described by taking the transmission of differential signals with a more complex arrangement as an example. The single-ended arrangement will not be repeated. It is sufficient to ensure that the grounding conductor 422 is bent and embedded in the corresponding accommodating groove 15.

[0078] Furthermore, when transmitting differential signals, since a pair of signal terminals 21 are composed of two parallel signal terminals 21, and both signal terminals 21 are provided with a first welding portion 214, a pair of signal terminals 21 include two first welding portions 214. One end of the pair of signal terminals 21 away from the first welding portion 214 passes through the first insulating block 12 or the second insulating block 13 and the rear portion is protruded in the inner cavity 115 to ensure that the external adapter board end connector is in contact and conductive with the pair of signal terminals 21 when inserted into the inner cavity 115. The first welding portion 214 is in the shape of a long strip and extends along the first direction. One side of the first welding portion 214 in the second direction is exposed to the first side 141 or the second side 142 for welding and conductive connection with the cable 4. The second welding portion 221 is arranged at one end of the grounding terminal 22. The end of the grounding terminal 22 away from the second welding portion 221 passes through the first insulating block 12 or the second insulating block 13 and then protrudes into the inner cavity 115. The grounding terminal 22 and a pair of signal terminals 21 are arranged in parallel in the same direction. The portion of the grounding terminal 22 protruding into the inner cavity 115 is used to contact and conduct the adapter plug inserted into the inner cavity 115. The grounding terminal 22 is used to shield the electromagnetic interference between the two adjacent pairs of signal terminals 21 on the same side, thereby ensuring the stability of the high-frequency signal transmission of a pair of signal terminals 21. The grounding conductor 422 is bent across the support platform 14 and electrically connected to the grounding terminal 22 to shield the electromagnetic interference between the first terminal row 2C and the second terminal row 2D, thereby further ensuring the stability of signal transmission. The second welding portion 221 is in the shape of a long strip and extends along the first direction. One side of the second welding portion 221 in the second direction is exposed to the first side 141 or the second side 142 for welding and connection with the cable 4. By welding and connection of a pair of signal terminals 21 and a ground terminal 22 with the cable 4, the signal transmission of the cable connector 100 is ensured. Specifically, in terms of projection along the second direction, the projection of the second welding portion 221 of the first terminal row 2C is located in the middle of the two first welding portions 214 of the pair of signal terminals 21 of the second terminal row 2D, and the projection of the second welding portion 221 of the second terminal row 2D is located in the middle of the two first welding portions 214 of the pair of signal terminals 21 of the first terminal row 2C. In this embodiment, the grounding terminal 22 is arranged in alignment with the accommodating groove 15, and one end of the second welding portion 221 away from the insulating shell 11 is exposed in the accommodating groove 15, so as to ensure that the grounding conductor 422 can be directly connected to the grounding terminal 22 after passing through the accommodating groove 15, and does not need to be extended a certain distance before connecting to the second welding portion 221, thereby reducing the wire loss of the grounding conductor 422 and reducing costs.

[0079] Furthermore, in the second direction, the distance between the first welding portion 214 of the first terminal row 2C and the first welding portion 214 of the second terminal row 2D is 1.55 mm to 1.8 mm. The welding spacing between the two rows of terminals of the existing high-frequency connector is usually 0.9 mm to 1.1 mm. In this embodiment, by increasing the distance between the first welding portion 214 of the first terminal row 2C and the first welding portion 214 of the second terminal row 2D to 1.55 mm to 1.8 mm, the crosstalk between the pair of signal terminals 21 of the first terminal row 2C and the pair of signal terminals 21 of the second terminal row 2D is reduced, thereby improving the stability of high-frequency signal transmission. After testing, it was found that the distance between the first welding portion 214 of the first terminal row 2C and the first welding portion 214 of the second terminal row 2D is not the larger the better, because the larger the distance between the first welding portion 214 of the first terminal row 2C and the first welding portion 214 of the second terminal row 2D, the thicker the support platform 14 will be, and the thicker the support platform 14, the thicker the dielectric layer will be. The thickness of the dielectric layer will affect the quality and stability of signal transmission. The increase in the thickness of the dielectric layer is likely to cause signal timing errors and increased bit error rate, especially in high-frequency signal transmission. Moreover, since the electric field is more densely distributed in materials with a larger dielectric constant, the increase in the thickness of the dielectric layer makes the electric field distribution more dense, which in turn causes the crosstalk to increase. Therefore, after a large number of tests, it was determined that the preferred distance between the first welding portion 214 of the first terminal row 2C and the first welding portion 214 of the second terminal row 2D is 1.55 mm to 1.8 mm, and the crosstalk effect is minimal within this range.

[0080] Furthermore, in the first direction, the length dimension of the first welding portion 214 is greater than the length dimension of the second welding portion 221, so that the first welding portion 214 of a pair of signal terminals 21 and the second welding portion 221 of the ground terminal 22 are arranged front to back in the first direction. During welding, the first welding portion 214 and the second welding portion 221 are arranged front to back in the first direction, so that the first welding portion 214 and the second welding portion 221 can be quickly identified and distinguished, thereby ensuring the rapid identification of the position of the ground terminal 22 and improving the wiring efficiency and assembly efficiency.

[0081] Furthermore, the number of the accommodating grooves 15 is multiple, and the number of the accommodating grooves 15 is equal to the total number of grounding terminals 22 arranged on the first terminal row 2C and the second terminal row 2D. The multiple accommodating grooves 15 are respectively arranged between the two first welding parts 214 of each pair of signal terminals 21. A notch 215 is provided at one end of the first welding portion 214 away from the insulating shell 11. The notch 215 is arranged in a groove shape on one side of the first welding portion 214 close to the accommodating groove 15. The notch 215 is used to avoid the position of the accommodating groove 15, thereby preventing the first welding portion 214 from protruding into the accommodating groove 15 and contacting and conducting with the grounding conductor 422, thereby improving the processing yield rate; and a groove-shaped notch 215 is provided at the end of a pair of signal terminals 21, so that a narrowing structure is formed at the end of the first welding portion 214. Since there is a gap between the end of the first welding portion 214 and the shielding layer 423, the signal conductor 421 is exposed at the gap position to form a characteristic impedance peak point. The characteristic impedance at the end position of the first welding portion 214 is raised by the narrowing structure, so that the fluctuation of the characteristic impedance at the gap position is smoother, thereby improving the integrity of the signal transmission.

[0082] Furthermore, the metal shell 3 is arranged around the outside of the insulating shell 11. The metal shell 3 is formed by bending a metal sheet into a ring structure and sleeved on the outside of the insulating shell 11. The metal shell 3 is used to shield the electromagnetic interference received in the inner cavity 115 area to ensure the stability of signal transmission. In this embodiment, a buckle 31 is provided at one end of the metal shell 3 close to the support platform 14. The insulating seat 1 is inserted into the metal shell 3 along the first direction. A slot 17 is provided at the insulating seat 1 corresponding to the position of the buckle 31. The buckle 31 is bent into the slot 17 to clamp and fix the metal shell 3 to the insulating seat 1. Furthermore, a convex rib 18 is convexly provided on the outer surface of the insulating seat 1, and the convex rib 18 is in the shape of a long strip and extends along the first direction. The convex rib 18 abuts against the inner side surface of the metal shell 3, and is supported between the metal shell 3 and the insulating seat 1 by the convex rib 18, so that a certain gap is formed between the metal shell 3 and the insulating seat 1, ensuring that when the matching board-end connector is plugged in and mated, the metal shell 3 can produce a certain amount of elastic deformation, thereby improving the tightness of the fit with the matching board-end connector.

[0083] For further information, see Figures 1 to 5 , Fig.11, the outer skin 41 is arranged on the outermost layer of the cable 4, and the outer skin 41 is used to protect each core wire group 42 inside. In this embodiment, the same core wire group 42 includes two signal wires and one ground wire, and the two signal wires are electrically connected to the two first welding parts 214 of a pair of signal terminals 21, respectively, and the ground wire is electrically connected to the second welding part 221 of the ground terminal 22. The grounding conductor 422 of the ground wire in the same core wire group 42 is located at the center between the signal conductors 421 of the two signal wires in the third direction. The number of the core wire groups 42 is multiple, and at least two core wire groups 42 are arranged in parallel at intervals along the third direction. The grounding conductors 422 of each core wire group 42 are alternately arranged on the first side 141 and the second side 142 on both sides, that is, the two signal conductors 421 of the core wire group 42 are located on the first side 141 or the second side 142 on the same side, and the grounding conductor 422 of the same core wire group 42 is located on the second side 141 on the other side. 42 or the first side 141, so that the two signal conductors 421 and one grounding conductor 422 of the same core wire group 42 are arranged in an isosceles triangle shape, and the grounding conductors 422 of each core wire group 42 are alternately arranged on the first side 141 and the second side 142 on both sides, so that the core wire groups 42 arranged in an isosceles triangle shape are alternately flipped in turn, which can save the space size occupied by each core wire group 42 in the third direction, thereby reducing the width of the cable connector 100 in the third direction, which is beneficial to the miniaturization and high-frequency design of the cable connector 100. It can be understood that the number of core wire groups 42 is equal to the total number of pairs of signal terminals 21 arranged on the first terminal row 2C and the second terminal row 2D, the two first welding portions 214 of each pair of signal terminals 21 respectively correspond to the two signal conductors 421 of each core wire group 42, and the second welding portion 221 of each grounding terminal 22 respectively corresponds to the grounding conductor 422 of each core wire group 42, that is, the second welding portion 221 on the first side 141 and the second side 142 on one side is correspondingly arranged between the two first welding portions 214 on the first side 141 and the second side 142 on the other side. Furthermore, the number of the core wire group 42 is one of two, three, four, five, six or seven, and the number of the core wire group 42 is equal to the total number of signal terminals 21 pairs arranged on the first terminal row 2C and the second terminal row 2D. Customers can select the number of signal terminals 21 pairs and core wire groups 42 according to actual usage requirements to ensure that at least one pair of signal terminals 21 and one grounding terminal 22 are arranged on the first terminal row 2C and the second terminal row 2D, so that the signal conductor 421 of the core wire group 42 can be connected to the first welding portion 214 on the first side 141 or the second side 142 on one side, and the grounding conductor 422 of the same core wire group 42 can cross the support platform 14 to connect to the second welding portion 221 on the second side 142 or the first side 141 on the other side.

[0084] Furthermore, the signal conductor 421 extends linearly along the first direction; the ground conductor 422 includes a bent portion 4221 and a fixed portion 4222, the bent portion 4221 is in a strip shape and extends along the second direction, the bent portion 4221 is embedded in the accommodating groove 15, and the bent portion 4221 is electrically coupled with the end of the second welding portion 221. The electrical coupling is divided into two cases. The first case is that the bent portion 4221 and the end of the second welding portion 221 are directly in contact to transmit electrical signals; the second case is that the bent portion 4221 and the end of the second welding portion 221 are close to each other but there is There is a gap. At this time, when one of the bending portion 4221 and the second welding portion 221 transmits a high-frequency signal, an electromagnetic induction signal will be generated in the other component, thereby realizing intermittent electrical coupling between the bending portion 4221 and the end of the second welding portion 221 for signal transmission; the fixing portion 4222 is in a strip shape and extends along the first direction. The fixing portion 4222 extends from the bending portion 4221 to the corresponding second welding portion 221 along the first direction and is welded and fixed to the second welding portion 221. The fixing portion 4222 and the corresponding second welding portion 221 transmit signals in a direct contact manner. By electrically coupling the bent portion 4221 with the end of the second welding portion 221, the fixed portion 4222 is in direct contact and conduction with the second welding portion 221, thereby increasing the path and area of ​​high-frequency signal transmission, thereby improving the high-frequency signal transmission effect; and by embedding the bent portion 4221 into the accommodating groove 15, the space occupied by the grounding conductor 422 between the shielding layer 423 and the support platform 14 in the first direction is reduced, thereby reducing the distance between the shielding layer 423 and the support platform 14. The smaller the distance between the shielding layer 423 and the support platform 14, the more complete the shielding layer 423 wraps the signal line and the ground line, thereby reducing the electromagnetic interference received by the signal during transmission and reducing crosstalk. In this embodiment, by embedding the bent portion 4221 into the accommodating groove 15, the minimum distance between the shielding layer 423 and the end of the first welding portion 214 is D1, then 0.1mm≤D1≤0.24mm, that is, the minimum distance between the shielding layer 423 and the end of the first welding portion 214 is 0.1mm to 0.24mm. Preferably, the minimum distance between the shielding layer 423 and the end of the first welding part 214 is 0.1 mm to 0.149 mm. Here, the smaller the distance between the shielding layer 423 and the end of the first welding part 214, the better the electromagnetic shielding effect against the outside world. However, it does not mean that the smaller the distance between the shielding layer 423 and the end of the first welding part 214, the better. Because the distance between the shielding layer 423 and the end of the first welding part 214 is too small, it will cause the insulation layer 424 to shrink and deform due to heat during welding on the support platform 14. The shrinkage and deformation of the insulation layer 424 will affect the process after welding and affect the yield rate. Therefore, after testing, the preferred distance range between the shielding layer 423 and the end of the first welding part 214 is 0.1 mm to 0.149 mm.

[0085] Furthermore, the shielding layer 423 is an aluminum foil, and the shielding layer 423 is coated on the outside of the signal line and the ground line to shield the electromagnetic interference of the outside to the signal line and the ground line, thereby ensuring the stability of the signal transmission of the cable 4. The insulating layer 424 is coated on the outside of the shielding layer 423 to protect the shielding layer 423, and at the same time, it is prevented from being connected between the core wire groups 42, so as to ensure the stable transmission of the signal. Specifically, when the core wire group 42 is welded with a pair of signal terminals 21 and a ground terminal 22, the insulating layer 424 and one end of the shielding layer 423 will be cut off first, and the insulating layer 424 and the end of the shielding layer 423 after cutting will be flush with each other to form an incision, and the part of the signal line passing through the incision will be exposed on the outside of the shielding layer 423 to form a signal conductor 421, and the signal conductor 421 is used to be welded and fixed with the first welding part 214; the part of the ground wire passing through the incision will be exposed on the outside of the shielding layer 423 to form a grounding conductor 422, and the grounding conductor 422 is used to be welded and fixed with the second welding part 221. In this embodiment, the ends of the insulating layer 424 and the shielding layer 423 are cut by laser cutting, and the laser cutting method can improve the dimensional accuracy; it can be understood that the ends of the insulating layer 424 and the shielding layer 423 can also be cut by stamping cutting. The specific end cutting method of the shielding layer 423 and the insulating layer 424 is not limited here, and it is ensured that the flush cut can expose the ends of the signal line and the ground line to form the signal conductor 421 and the grounding conductor 422.

[0086] For further information, see Figures 7 to 10The signal terminal 21 includes a contact portion 211, a bending portion 212, an extension portion 213 and a first welding portion 214 connected in sequence along a first direction. The contact portion 211 and the bending portion 212 are exposed in the inner cavity 115, and the extension portion 213 is at least partially embedded in the first insulating block 12 or the second insulating block 13. The extension portion 213 includes a contraction section 2135 connected to the bending portion 212, an embedded section 2131 connected to the contraction section 2135 away from the bending portion 212, and an exposed section 2132 connected to one end of the first embedded section 2131 away from the bending portion 212; the contraction section 2135 and the embedded section 2131 are embedded in the insulating material of the first insulating block 12 or the second insulating block 13 together, and an opening is provided at the position of the first insulating block 12 or the second insulating block 13 corresponding to the exposed section 2132, so that the exposed section 2132 is exposed to the opening corresponding to the first insulating block 12 or the second insulating block 13. In this embodiment, the end of the bent portion 212 away from the contact portion 211 is inserted into the insulating material. The end of the bent portion 212 is inserted into the insulating material due to the injection molding process. Because the end of the bent portion 212 away from the contact portion 211 corresponds to the surface adjacent to the insulating material, that is, during the transmission of the electrical signal from the bent portion 212 to the extension portion 213, the medium will change from air to insulating material, the dielectric constant will increase, and the characteristic impedance will decrease. In order to balance the characteristic impedance, it is necessary to narrow the portion embedded in the insulating material to increase the characteristic impedance. Resistance, reduce the curve fluctuation of characteristic impedance, and improve the stability of high-frequency signal transmission. It is for the above reasons that the width of the end of the bending portion 212 away from the contact portion 211 will be greater than the width of the embedded section 2131, so a narrowed transition surface will be set at the end of the bending portion 212 close to the embedded section 2131, and the injection molding process limits the interface of the insulating material to be unable to be set on the transition surface with varying width, so it is necessary to insert one end of the bending portion 212 connected to the extension portion 213 into the insulating material, that is, the insulating material will completely wrap the transition surface with varying width. Furthermore, the width of the bending portion 212 in the third direction away from the contact portion 211 is B3, the width of the contraction section 2135 in the third direction is B4, the width of the embedded section 2131 in the third direction is B5, and the width of the exposed section 2132 in the third direction is B6; then B4<B5, B5<B3, B5<B6; that is, in the third direction, the width of the contraction section 2135 is smaller than the width of the embedded section 2131, the width of the embedded section 2131 is smaller than the width of the bending portion 212 away from the contact portion 211, and the width of the embedded section 2131 is smaller than the width of the exposed section 2132.The width of the embedded section 2131 embedded in the insulating material is smaller than the width of the bent portion 212 and the exposed section 2132 exposed outside the insulating material, thereby forming a primary narrowing to balance the characteristic impedance of the bent portion 212 and the exposed section 2132 exposed to the air; and by providing a shrinking section 2135 connected to the bent portion 212, the width of the shrinking section 2135 is smaller than the width of the embedded section 2131, thereby forming a secondary narrowing to partially increase the characteristic impedance of the position where the bent portion 212 is inserted into the insulating material, so as to solve the problem that the insulating material will wrap the bent portion 212 during the injection molding process. 2 causes a problem in which the characteristic impedance suddenly drops when the bend portion 212 penetrates the insulating material at the initial position. The reason for the sudden drop in the characteristic impedance when the bend portion 212 penetrates the insulating material is that the width of the bend portion 212 at the initial position where it is inserted into the insulating material remains relatively large, while the medium suddenly changes from air to an insulating material. Under the combined effect of the width and the dielectric constant, the characteristic impedance suddenly drops. By further narrowing the narrowed embedded section 2131 to form a secondary narrowed contraction section 2135, the fluctuation of the characteristic impedance is balanced to ensure the stability of high-frequency signal transmission.

[0087] For further information, see Fig.12 , is the test result of the signal terminal SCD21 without the contraction section 2135 in the prior art. SCD21 is a differential-to-common mode test. The smaller the differential-to-common mode measurement value and the farther from the standard line, the better the integrity of the signal transmission. It can be seen from the figure that the differential-to-common mode corresponding to 7.46GHz in the prior art is -19.46, which exceeds the standard line, resulting in the test failing to meet the standard requirements and poor signal integrity. Please refer to Fig.13 , is the SCD21 test result of the signal terminal after the contraction section 2135 is set in this embodiment, from Fig.13 It can be seen that the differential-to-common-mode curves in the range of 0 to 25 GHz are all below the standard line, meeting the standard requirements. It can be seen that by setting the contraction section 2135 between the elastic portion 212 and the first embedded section 2131 and adjusting the characteristic impedance through secondary narrowing, the integrity of the signal transmission is effectively improved.

[0088] Further, please refer again to Figures 7 to 10The bending portion 212 includes a first lever arm segment 2121 connected to the contact portion 211 and a second lever arm segment 2122 connected to the first lever arm segment 2121, and the second lever arm segment 2122 is located at an end of the bending portion 212 away from the contact portion 211; the width of the contact portion 211 in the third direction is B1, the width of the first lever arm segment 2121 in the third direction is B2, the width of the second lever arm segment 2122 in the third direction is B3, and the width of the first welding portion 214 in the third direction is B7; then B1<B7<B3<B2, B2>2B1. Since the first welding portion 214 is connected to the cable 4, the contact portion 211 is in contact with the adapter board connector terminal, and the cable 4 has a shielding layer 423, which is a lower characteristic impedance point than the plug connector, so the width of the first welding portion 214 is greater than the width of the contact portion 211, so that the characteristic impedance difference between the first welding portion 214 and the cable 4 is smaller, and the characteristic impedance difference between the contact portion 211 and the plug connector is smaller, thereby balancing the fluctuation of the characteristic impedance. Since the thickness of the signal transmission is doubled after the contact portion 211 is in contact with the adapter board connector terminal, the first force arm section 2121 connected to the contact portion 211 needs to be wider than the width of the contact portion 211. At the same time, considering that the contact portion 211 is deformed when it is in contact with the plug connector terminal, the signal terminal 21 will be supported more gently, which is equivalent to an increase in the cross-sectional area and a decrease in the characteristic impedance. The contact area between the gently supported signal terminal 21 and the plug connector terminal will also increase, and considering the electrical coupling, the width of the first force arm section 2121 needs to be greater than twice the width of the contact portion 211. By making the width of the second force arm section 2122 smaller than that of the first force arm section 2121, the characteristic impedance is raised before penetrating into the first insulating block 12 or the second insulating block 13, thereby balancing the decrease in the characteristic impedance after penetrating into the first insulating block 12 or the second insulating block 13, making the overall fluctuation of the characteristic impedance more stable.

[0089] In summary, the present invention provides a cable connector 100. Compared with the prior art, the present invention has the following beneficial effects:

[0090] 1. A plurality of accommodating grooves 15 are provided through the support platform 14 along the second direction between the first terminal row 2C and the second terminal row 2D, and the grounding conductor 422 of the ground wire is bent into one of the accommodating grooves 15 and electrically connected to the second welding portion 221 located on the support platform 14, so that the ground wire can be bent and embedded in the accommodating groove 15 when crossing from one side of the support platform 14 to the other side, so that the grounding conductor 422 is directly arranged on the side of the signal terminal 21, thereby improving the electromagnetic shielding effect between adjacent signal terminals 21, and also improving the electromagnetic shielding effect between the first terminal row 2C and the second terminal row 2D, reducing the electromagnetic interference received during signal transmission, reducing crosstalk, and ensuring the stability of high-frequency signal transmission. In addition, by embedding the grounding conductor 422 of the ground wire into the accommodating groove 15 of the support platform 14, the space occupied by the grounding conductor 422 between the support platform 14 and the shielding layer 423 of the cable 4 is reduced, thereby reducing the exposed length of the signal line and the ground wire between the shielding layer 423 and the support platform 14, thereby improving the electromagnetic shielding effect of the welding area between the plug connector and the cable 4, further reducing the electromagnetic interference received during the signal transmission process, reducing crosstalk, and ensuring the stability of high-frequency signal transmission.

[0091] 2. The bent portion 4221 extends along the second direction and is embedded in the accommodating groove 15, the fixing portion 4222 extends from the bent portion 4221 toward the second welding portion 221 along the first direction and is welded and fixed to the second welding portion 221, the bent portion 4221 is electrically coupled with the end of the second welding portion 221, and the fixing portion 4222 and the second welding portion 221 are directly contacted to transmit signals, and the bent portion 4221 and the end of the second welding portion 221 can transmit signals in an electrically coupled manner even if there is a small gap, thereby increasing the signal transmission area and improving the high-frequency signal transmission effect. In addition, the bent portion 4221 extends in the second direction, thereby improving the electromagnetic shielding effect of the first terminal row 2C and the second terminal row 2D in the second direction, and the bent portion 4221 is embedded in the accommodating groove 15 while the fixing portion 4222 extends in the first direction, thereby improving the electromagnetic shielding effect between the two adjacent pairs of signal terminals 21 in the first direction, thereby reducing the electromagnetic interference received during the signal transmission process, reducing crosstalk, and ensuring the stability of high-frequency signal transmission.

[0092] 3. By making the length dimension of the first welding portion 214 greater than the length dimension of the second welding portion 221 in the first direction, the first welding portion 214 and the second welding portion 221 are arranged front to back in the first direction. When welding the core wire group 42 of the cable 4, the setting position of the second welding portion 221 of the grounding terminal 22 can be clearly and easily identified, thereby achieving rapid positioning during the welding and wiring process, thereby improving assembly efficiency.

[0093] 4. By setting a notch 215 at one end of the first welding part 214 away from the insulating shell 11, and setting the notch 215 in a groove shape on the side of the first welding part 214 close to the accommodating groove 15, it is prevented that the first welding part 214 protrudes into the accommodating groove 15, causing the signal terminal 21 and the ground wire to be damaged. By setting the notch 215 on the side of the first welding part 214 close to the accommodating groove 15 to avoid the position, the yield rate of the structure processing of bending the ground wire and embedding it into the accommodating groove 15 is guaranteed. In addition, a groove-shaped notch 215 is set at the end of a pair of signal terminals 21, so that the end of the first welding part 214 away from the insulating shell 11 is narrowed. Since there is a gap between the end of the first welding part 214 and the shielding layer 423, the signal conductor 421 is exposed at the gap position to form a characteristic impedance protrusion point. The characteristic impedance at the end of the first welding part 214 is raised by the narrowing structure, so that the fluctuation change of the characteristic impedance at the gap position is smoother, thereby improving the integrity of signal transmission.

[0094] 5. The overflow groove 16 receives the overflowed tin during welding to prevent the signal terminals 21 or the signal terminal 21 and the ground terminal 22 from being short-circuited by the tin. The overflowed tin is accommodated by the overflow groove 16 to ensure the welding quality and improve the welding yield rate.

[0095] 6. The fixing portion 4222 is welded to the second welding portion 221, and the bending portion 4221 and the fixing portion 4222 are bent at a certain angle. Therefore, when the fixing portion 4222 and the second welding portion 221 are welded, the bending portion 4221 will have a certain drainage effect on the overflowed tin material. By dividing the accommodating groove 15 into two parts, a near-ground section 151 and a far-ground section 152, the width dimension of the near-ground section 151 in the third direction is greater than the width dimension of the far-ground section 152, thereby increasing the accommodating capacity of the accommodating groove 15 corresponding to the ground wire bending portion 4221, thereby solving the influence of the bending portion 4221 on the drainage of the tin material, reducing the risk of the tin liquid overflowing from the grounding conductor 422 flowing through the accommodating groove 15 to the opposite side of the support platform 14 and the conduction with the signal conductor 421, and ensuring the welding quality. And because the width of the near segment 151 is greater than that of the far segment 152, a blocking surface 156 is formed at one end of the far segment 152 close to the near segment 151. The blocking surface 156 can effectively block the tin material on the side wall of the near segment 151 from flowing into the far segment 152, thereby preventing the first side 141 and the second side 142 from being connected by the tin material, thereby improving the welding quality.

[0096] 7. By making the depression depth of the near-ground section 151 and the depression depth of the far-ground section 152 in the first direction unequal, a depth difference of different heights in the first direction is formed in the accommodating groove 15. When the liquid tin material flows to the depth difference, due to the surface tension of the tin material, the tin material will gather at the depth difference and be difficult to continue flowing, thereby increasing the resistance of the tin material at the junction of the near-ground section 151 and the far-ground section 152, preventing the first side 141 and the second side 142 from being connected by the tin material, and improving the welding quality.

[0097] 8. By setting inclined guide surfaces 155 on both side walls of the remote section 152, the inclined guide surfaces 155 on both sides are inclinedly arranged with a gradually increasing spacing from close to the insulating shell 11 to away from the insulating shell 11, making it easier for the bent portion 4221 to be embedded in the accommodating groove 15, thereby improving assembly efficiency.

[0098] 9. The first insulating block 12 and / or the second insulating block 13 are stopped in the first direction by the limit bar 111, and at the same time, the limit bar 111 is supported between the first insulating block 12 and the second insulating block 13 in the second direction, so that the limit bar 111 limits the installation position of the first insulating block 12 and the second insulating block 13 in the first direction and the second direction at the same time, which makes the structure simpler and saves production costs.

[0099] 10. By bending the end of the ground wire exposed on the outside of the shielding layer 423 and embedding it into the accommodating groove 15, the distance between the shielding layer 423 and the support platform 14 is 0.1 mm to 0.24 mm, which greatly improves the electromagnetic shielding effect of the welding area. In the field of high-frequency transmission, the distance between the shielding layer 423 and the support platform 14 is controlled at 0.1 mm to 0.24 mm, which can reduce the crosstalk of high-frequency signals in the welding area and ensure the stability of high-frequency signal transmission.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0101] The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A cable connector having a first direction and a second direction intersecting each other, characterized in that: The cable connector comprises: An insulating seat, wherein the insulating seat is provided with an exposed supporting platform, and the supporting platform has a first side and a second side opposite to each other in a second direction; A first terminal row and a second terminal row, wherein the first terminal row and the second terminal row are provided with the insulating seat along a first direction, and the first terminal row and the second terminal row are arranged on the first side and the second side of the support platform respectively; the first terminal row and the second terminal row each include at least one signal terminal and a ground terminal arranged on one side of the signal terminal; a first welding portion is provided at one end of the signal terminal close to the support platform, and a second welding portion is provided at one end of the ground terminal close to the support platform, the first welding portion and the second welding portion of the first terminal row are exposed on the first side of the support platform, the first welding portion and the second welding portion of the second terminal row are exposed on the second side of the support platform, and the second welding portion of the first terminal row and the second welding portion of the second terminal row are staggered; A metal shell covering the insulating seat; A cable electrically connecting the first terminal row and the second terminal row; the cable comprises an outer sheath and at least two core wire groups located in the outer sheath; the core wire group comprises a signal wire, a ground wire, a shielding layer wrapped outside the signal wire and the ground wire, and an insulating layer wrapped outside the shielding layer; one end of the signal wire is exposed outside the shielding layer and the insulating layer to form a signal conductor, and one end of the ground wire is exposed outside the shielding layer and the insulating layer to form a grounding conductor; Among them, the support platform is provided with a plurality of accommodating grooves passing through along the second direction between the first terminal row and the second terminal row, and the ends of the plurality of second welding parts of the first terminal row and the second terminal row are respectively exposed in the plurality of accommodating grooves in a one-to-one correspondence; the signal conductor of the same core wire group is electrically connected to the first welding part located on the first side or the second side of the support platform, and the grounding conductor is bent into one of the accommodating grooves and electrically connected to the second welding part located on the second side or the first side of the support platform.

2. The cable connector according to claim 1, characterized in that: The signal conductor extends straightly along the first direction, and the grounding conductor includes a bending portion and a fixing portion; the bending portion is in a strip shape and extends along the second direction, and the bending portion is embedded in the accommodating groove, and the fixing portion extends from the bending portion toward the corresponding second welding portion along the first direction and is welded and fixed to the second welding portion, and the bending portion is electrically coupled to the end of the corresponding second welding portion.

3. The cable connector according to claim 1, characterized in that: The cable connector has a third direction, and the first direction, the second direction and the third direction intersect each other; The signal terminals on the first terminal row are differential signal terminals, and the signal terminals on the second terminal row are differential signal terminals, and the ground terminal is arranged on one side of a pair of the signal terminals; Each of the core wire groups includes two of the signal wires and one of the ground wires; the ground conductor of the ground wire in the same core wire group is located at the center between the signal conductors of the two signal wires in the third direction, the two signal conductors and one of the ground conductors in the same core wire group are arranged in an isosceles triangle shape, and at least two of the core wire groups are arranged in parallel with each other along the third direction; In a first direction, a length dimension of the first welding portion is greater than a length dimension of the second welding portion.

4. The cable connector according to claim 3, characterized in that: A plurality of the accommodating grooves are respectively disposed between the two first welding portions of each pair of the signal terminals; A notch is provided at the end of the first welding portion close to the supporting platform, and the notch is located at a side of the first welding portion close to the accommodating groove.

5. The cable connector according to claim 1, characterized in that: At least two overflow grooves are provided on the support platform; each of the overflow grooves is in the shape of a strip groove extending along the first direction, and a plurality of the overflow grooves are relatively arranged on both sides of the first welding part and / or the second welding part; each of the overflow grooves is connected to the corresponding accommodating channel.

6. The cable connector according to claim 1, characterized in that: The cable connector has a third direction, and the first direction, the second direction and the third direction intersect each other; The accommodating channel comprises a near-ground section and a far-ground section; the near-ground section is arranged at one end of the accommodating channel close to the second welding portion, and the far-ground section is arranged at one end of the accommodating channel far from the second welding portion, and the near-ground section is connected to the far-ground section; In the third direction, the width dimension of the near segment is greater than the width dimension of the far segment.

7. The cable connector according to claim 6, characterized in that: In the first direction, the depression depth of the near segment is not equal to the depression depth of the far segment.

8. The cable connector according to claim 6, characterized in that: The two side walls of the remote section are provided with inclined guide surfaces, and the inclined guide surfaces on both sides are arranged in an inclined manner with the spacing gradually increasing in the direction approaching the cable.

9. The cable connector according to claim 6, characterized in that: The insulating seat includes an insulating shell, a first insulating block and a second insulating block assembled in the insulating shell; the first insulating block and the second insulating block are spliced ​​along a second direction, and one of the near-ground section and the far-ground section of the same accommodating groove is arranged on the first insulating block, and the other is arranged on the second insulating block.

10. The cable connector according to claim 1, characterized in that: The insulating seat comprises an insulating shell, a first insulating block and a second insulating block assembled in the insulating shell; the first insulating block covers the first terminal row, and the second insulating block covers the second terminal row; The signal terminal comprises a contact portion, a bending portion, a contraction section, an embedded section, an exposed section and a first welding portion connected in sequence along a first direction; the bending portion extends out of the first insulating block or the second insulating block, the exposed section is exposed in an opening correspondingly provided in the first insulating block or the second insulating block, and the contraction section and the embedded section are both embedded in the first insulating block or the second insulating block; Wherein, in the third direction, the width of the contracted section is smaller than the width of the embedded section, the width of the embedded section is smaller than the width of the end of the bent portion away from the contact portion, and the width of the embedded section is smaller than the width of the exposed section.

11. The cable connector according to claim 1, characterized in that: A buckle is provided at one end of the metal shell close to the support platform, the insulating seat is inserted into the metal shell along a first direction, a slot is provided at the insulating seat corresponding to the position of the buckle, the buckle is bent into the slot, and is used to clamp and fix the metal shell to the insulating seat; A convex rib is convexly arranged on the outer side surface of the insulating seat, the convex rib is in a long strip shape and extends along a first direction, and the convex rib abuts against the inner side surface of the metal shell.

12. The cable connector according to claim 1, characterized in that: The minimum distance between the shielding layer and the end of the first welding portion is 0.1 mm to 0.24 mm.

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