Electric connector

Abstract

The invention discloses an electric connector, which comprises a shell, a plurality of signal terminals and a plurality of grounding terminals which are arranged side by side along the left-right direction, and a loss component, the shell is provided with a slot, each grounding terminal comprises a grounding holding part which is upwards connected with a grounding elastic part, and the loss component is electrically coupled with the grounding holding part. The loss component comprises a plurality of extension parts which upwards exceed the bottom surface of the slot but are lower than the grounding contact parts, each extension part is overlapped with each grounding elastic part when viewed downwards, and the extension parts are positioned between the grounding elastic parts and the slot in the front-back direction, so that the capacitive coupling at the positions of the grounding elastic parts is increased, the distance is optimized, and the high-frequency performance of the electric connector is improved.

Description

[Technical field]

[0001] The present invention relates to an electric connector, in particular to an electric connector with improved high frequency performance. [Background technology]

[0002] An existing electrical connector includes a shell, at least one lossy component, a plurality of grounding terminals and a plurality of signal terminals. The shell includes a slot for inserting a docking element. The plurality of grounding terminals and the plurality of signal terminals are accommodated in the shell and arranged side by side in the left-right direction. Each grounding terminal includes a retaining portion, the retaining portion is connected to a tail portion downwardly, and the retaining portion is connected to an elastic portion upwardly. The lossy component is electrically coupled to the retaining portion to reduce crosstalk.

[0003] However, the location of the elastic part still has a problem of large inductive coupling, resulting in large crosstalk in the elastic part, and the high-frequency performance of the electrical connector needs to be further improved.

[0004] Therefore, it is necessary to design an electrical connector to solve the above technical problems. [Summary of the invention]

[0005] The invention aims to provide an electrical connector in which a lossy component overlaps with a grounding elastic portion, thereby improving high frequency performance.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An electrical connector for docking a docking element, characterized in that it comprises: a housing, comprising a slot for inserting the docking element, defining the insertion direction of the docking element as downward; a plurality of signal terminals and a plurality of grounding terminals accommodated in the housing and arranged side by side, defining the arrangement direction of the signal terminals and the grounding terminals as the left-right direction, each grounding terminal comprising a grounding retaining portion, the grounding retaining portion being downwardly connected to a grounding tail portion, the grounding retaining portion being upwardly connected to a grounding elastic portion, extending from the grounding elastic portion to form a grounding contact portion entering the slot for contacting the docking element; a loss component, electrically coupled to the grounding retaining portion, the loss component comprising a plurality of extension portions extending upwardly beyond the bottom surface of the slot and corresponding one-to-one to the grounding elastic portions, the extension portions being lower than the grounding contact portions, and each extension portion overlapping the corresponding grounding elastic portion when viewed downward, and in the front-to-back direction, the extension portion is located between the grounding elastic portion and the slot.

[0008] Furthermore, two signal terminals adjacent to each other in the left-right direction form a differential terminal pair, and a grounding terminal adjacent to the differential terminal pair is distributed on each of the left and right sides. The grounding retaining portion includes a narrow portion and a wide portion located above the narrow portion. In the left-right direction, the size of the narrow portion is smaller than the size of the wide portion, and the distance between the wide portion and the adjacent differential terminal pair is smaller than the distance between the narrow portion and the adjacent differential terminal pair. The loss component includes a protruding portion extending toward the grounding retaining portion relative to the extension portion and electrically coupled with the narrow portion. In the front-to-back direction, the distance between the loss component and the wide portion is greater than the distance between the protruding portion and the narrow portion, and the distance between the extension portion and the grounding elastic portion is also greater than the distance between the protruding portion and the narrow portion.

[0009] Furthermore, each signal terminal includes a signal retaining portion, the signal retaining portion is connected downwardly to a signal tail portion, the signal retaining portion is connected upwardly to a signal elastic portion, and a signal contact portion is extended from the signal elastic portion to enter the slot for contacting the docking element; the electrical connector also includes a plug, the plug and the loss component are injection molded, the plug has a main body and a plurality of protrusions extending upward from the main body, looking downward, each protrusion overlaps with at least one signal elastic portion, in the front-to-back direction, the protrusion is located between the signal elastic portion and the slot, each protrusion corresponds to two adjacent signal terminals, in the left-right direction, the size of the protrusion is larger than the size of the extension portion, and in the up-down direction, the extension portion is lower than the protrusion.

[0010] Furthermore, the signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, and the two terminal rows are distributed on both sides of the slot in the front-to-back direction. The loss component and the plug are arranged between the two terminal rows, and the extension part and the protrusion are both arranged on the outside of the slot. In the front-to-back direction, the distance between the extension part and the slot is greater than the distance between the protrusion and the slot.

[0011] Furthermore, the signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, and the two terminal rows are distributed on both sides of the slot along the front-to-back direction. The electrical connector also includes two injection-molded blocks, each of which is injection-molded with a corresponding terminal row. In the front-to-back direction, the distance between the protrusion and the signal elastic part is smaller than the distance between the extension part and the ground elastic part. Each protrusion extends toward the signal elastic part along the front-to-back direction to form a hook, and the hook cooperates with the upper surface of the injection-molded block to fix the plug to the injection-molded block.

[0012] Furthermore, the signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, and the two terminal rows are distributed on both sides of the slot along the front-back direction. Each grounding tail includes a grounding welding portion welded to the circuit board and a grounding bending portion connecting the grounding welding portion and the grounding holding portion. Two signal terminals adjacent to each other in the left-right direction form a differential terminal pair. A grounding terminal adjacent to the differential terminal pair is distributed on each of the left and right sides. The differential terminal pair and the grounding terminals adjacent to the left and right sides form a terminal group. The spacing between the two grounding tails in the same terminal group is smaller than the spacing between the two grounding holding portions. The electrical connector also includes two injection molded blocks, each injection molded block is injection molded with a corresponding terminal row, and a plurality of spacer blocks are arranged downwardly on the injection molded block, and each spacer block is located between two adjacent grounding bending portions.

[0013] Furthermore, the outer shell is extended downward to be provided with a plurality of dividing blocks, and the dividing blocks are aligned front to back with the spacing blocks.

[0014] Furthermore, the signal terminal includes a signal holding portion, the signal holding portion is connected to a signal tail portion downwardly, the signal holding portion is connected to a signal elastic portion upwardly, a signal contact portion extending from the signal elastic portion to enter the slot, the signal contact portion is used to contact the docking element, in the front-to-back direction, the signal elastic portion is closer to the slot than the signal tail portion, and the signal holding portion is flat and extends obliquely from bottom to top toward the slot.

[0015] Furthermore, the signal terminal and the ground terminal are arranged in the front-to-back direction to form two terminal rows, the loss component is arranged between the two terminal rows, a metal sheet is arranged between the terminal row and the loss component, and the loss component is electrically coupled to the ground terminal through the metal sheet.

[0016] Furthermore, the grounding tail is welded to a surface of the circuit board, and the metal sheet is provided with a plurality of welding feet welded to the surface of the circuit board, and the welding feet are aligned with the grounding tail front and back.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The loss component is electrically coupled with the ground terminal to form a ground loop, thereby optimizing the shielding effect and reducing crosstalk. The loss component is also provided with an extension portion. Looking downward, each extension portion overlaps with the corresponding grounding elastic portion. In the front-to-back direction, the extension portion is located between the grounding elastic portion and the slot, thereby increasing the capacitive coupling at the grounding elastic portion. According to the formula The size of the remote string is related to the difference between capacitive coupling and inductive coupling. Increasing the capacitive coupling actually means using more capacitive coupling to offset the inductive coupling, thus making the above formula The value of is reduced to optimize the long string and improve the high-frequency performance; and the loss component can absorb the noise between the signal terminals. The setting of the extension portion makes the loss component have a larger area corresponding to the ground terminal, and the effect of absorbing the noise between the signal terminals is better, thereby further improving the high-frequency performance of the electrical connector.

Brief Description of the Drawings

[0019] Figure 1 A three-dimensional diagram of the electrical connector of the present invention being installed on a circuit board and docking with a docking element;

[0020] Figure 2 for Figure 1 Exploded view of the CEC connector, docking components and circuit board;

[0021] Figure 3 for Figure 1 A three-dimensional exploded view of some components of the China Electric connector;

[0022] Figure 4 for Figure 1 A front view of the electrical connector and some components of the circuit board;

[0023] Figure 5 for Figure 1 A cross-sectional view of the CEC connector and the circuit board along the plane where the Z-axis and the Y-axis are located;

[0024] Figure 6 for Figure 1 A side view of some components of the electrical connector;

[0025] Figure 7 for Figure 1 A top view of some components of the electrical connector;

[0026] Figure 8 for Figure 1 A three-dimensional view of some components of the electrical connector and circuit board;

[0027] Fig. 9 for Figure 1 Front view of part of the terminal group of the China Electric connector.

[0028] Description of the accompanying drawings for the specific implementation:

[0029] Electrical connector 100 Shell 1 Slot 11 Separator block M Injection block 2 Guide groove 21 Fixed slot 22 Spacer block N Terminal block R Signal terminal 3 Signal holding part 31 Signal tail 32 Signal welding part 321 Signal bending portion 322 Signal elastic part 33 Signal contact 34 Differential terminal pair S Ground terminal 4 Ground holding portion 41 Wide section 411 Narrow part 412 Ground tail 42 Ground welding part 421 Ground bending portion 422 Grounding elastic portion 43 Ground contact 44 Terminal Group Loss component 5 Ontology Base 51 Bump 52 Extension 53 First mating surface 531 Protrusion 54 Plug 6 Main body 61 Protrusion 62 Second mating surface 621 Hook 63 Metal sheet 7 Slot 71 Isolation section 72 Fixed block 73 Welding foot 74 Docking element 200 Circuit board 300 Metal sheet pad 301 Signal pad 302 Ground pad 303 [Specific implementation method]

[0030] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0031] For ease of understanding, the present invention defines the X-axis extension direction as the left-right direction, wherein the positive direction of the X-axis is rightward, defines the Y-axis extension direction as the front-back direction, wherein the positive direction of the Y-axis is forward, defines the Z-axis as the up-down direction, wherein the positive direction of the Z-axis is upward; defines the spacing as the length between the centers of two elements, and defines the distance as the length between the edges of two elements.

[0032] See also Figure 1 , 2 3. The electrical connector 100 of the present invention is used for docking a docking element 200 in the up and down directions. The electrical connector 100 includes a housing 1, two injection-molded blocks 2, a plurality of signal terminals 3, a plurality of ground terminals 4, a loss component 5, a plug 6 and two metal sheets 7.

[0033] See also Figure 1 , 2 5. The housing 1 is provided with a slot 11 for the docking element 200 to be inserted into, and the lower surface of the housing 1 extends downward to form a plurality of partition blocks M.

[0034] See also Figure 2 , 5 Two injection blocks 2 are accommodated in the shell 1, and the two injection blocks 2 are distributed on both sides of the slot 11 along the front-to-back direction. The side of the injection block 2 facing the slot 11 is provided with a plurality of guide grooves 21 extending upward from its lower surface, and the guide grooves 21 do not penetrate the upper surface of the injection block 2; the side of the injection block 2 facing the slot 11 is also provided with a plurality of fixing grooves 22 recessed along the front-to-back direction; the lower surface of the injection block 2 extends downward to form a plurality of spacer blocks N, and the spacer blocks N correspond to the partition blocks M one by one and are aligned in the front-to-back direction.

[0035] See also Figure 2 , 3, 5, 9, each signal terminal 3 includes a signal tail portion 32, a signal retaining portion 31, a signal elastic portion 33 and a signal contact portion 34. The signal tail portion 32 extends out of the housing 1 from the lower surface of the housing 1 and is welded on a circuit board 300 (of course, in other embodiments, the signal tail portion 32 can also be connected to a cable). The surface of the circuit board 300 is provided with a signal pad 302, and the signal tail portion 32 is welded to the signal pad 302 (that is, the welding method is SMT). Of course, in other embodiments, the circuit board 300 can also be provided with a hole that matches the signal tail portion 32, and the signal tail portion 32 is inserted into the hole (that is, the welding method is DIP). The signal tail portion 32 includes a signal welding portion 321 welded to the surface of the circuit board 300 and a signal bending portion 322 connecting the signal welding portion 321 and the signal retaining portion 31. The injection block 2 is injection molded with the signal holding portion 31, and the signal holding portion 31 is formed by extending upward from the signal bending portion 322, and the insertion direction of the docking component 200 is perpendicular to the circuit board 300. Of course, in other embodiments, the signal holding portion 31 can also be first extended upward and then bent and extended in the front-to-back direction, and the insertion direction of the docking component 200 is not perpendicular to the circuit board 300. The signal elastic portion 33 is formed by extending upward from the signal holding portion 31, and the signal elastic portion 33 extends upward to form a signal contact portion 34 extending into the slot 11. When the docking component 200 is inserted into the slot 11, the signal contact portion 34 contacts the docking component 200, and the signal elastic portion 33 can swing.

[0036] See also Figure 3 , 5 6. In the front-to-back direction, the signal elastic portion 33 is closer to the slot 11 than the signal tail portion 32. The signal retaining portion 31 is flat as a whole and extends obliquely from bottom to top toward the slot 11, thereby connecting the signal elastic portion 33 and the signal tail portion 32. The signal retaining portion 31 has no bent portion. At this time, the length of the signal retaining portion 31 is the shortest, so that the signal transmission path is also the shortest path, thereby improving the signal transmission performance of the signal terminal 3.

[0037] See also Figure 2 , 3, 5, 9, each grounding terminal 4 includes a grounding tail 42, a grounding holding portion 41, a grounding elastic portion 43 and a grounding contact portion 44. The grounding tail 42 extends out of the housing 1 from the lower surface of the housing 1 and is welded to the circuit board 300 (of course, in other embodiments, the signal tail 32 can also be connected to the cable). The surface of the circuit board 300 is provided with a grounding pad 303, and the grounding tail 42 is welded to the grounding pad 303 (that is, the welding method is SMT). Of course, in other embodiments, the circuit board 300 can also be provided with a hole that matches the grounding tail 42, and the grounding tail 42 is inserted into the hole (that is, the welding method is DIP). The grounding tail 42 includes a grounding welding portion 421 welded to the surface of the circuit board 300 and a grounding bending portion 422 connecting the grounding welding portion 421 and the grounding holding portion 41. The grounding holding portion 41 is injection molded with the injection block 2. The grounding holding portion 41 is formed by extending upward from the grounding bending portion 422. The insertion direction of the docking element 200 is perpendicular to the circuit board 300. Of course, in other embodiments, the grounding holding portion 41 can also be extended upward first and then bent and extended along the front-back direction. The insertion direction of the docking element 200 is not perpendicular to the circuit board 300. The grounding holding portion 41 includes a narrow portion 412 and a wide portion 411 located above the narrow portion 412. The size of the narrow portion 412 is smaller than the size of the wide portion 411 in the left-right direction. The grounding elastic portion 43 is formed by extending upward from the grounding holding portion 41. The grounding elastic portion 43 extends upward to form a grounding contact portion 44 extending into the slot 11. When the docking element 200 is inserted into the slot 11, the grounding contact portion 44 contacts the docking element 200, and the grounding elastic portion 43 can swing.

[0038] See also Figure 3 , 5 6. In the front-to-back direction, the grounding elastic portion 43 is closer to the slot 11 than the grounding tail portion 42. The grounding holding portion 41 is flat as a whole and extends obliquely from bottom to top toward the slot 11, thereby connecting the grounding elastic portion 43 and the grounding tail 42. The grounding holding portion 41 has no bent portion. When viewed from the left and right direction, the shapes of the grounding holding portion 41 and the signal holding portion 31 match. At this time, the length of the grounding holding portion 41 is the shortest, and the grounding path is also the shortest.

[0039] See also Figure 2 , 3, 5, 9, a plurality of signal terminals 3 and a plurality of grounding terminals 4 are arranged in the left-right direction to form two terminal rows R, which are distributed on both sides of the slot 11 in the front-back direction, and each terminal row R is injection molded with an injection block 2. In each terminal row R, two adjacent signal terminals 3 form a differential terminal pair S, and a grounding terminal 4 is disposed adjacent to the left and right sides of the differential terminal pair S, and the differential terminal pair S and the adjacent grounding terminals 4 on the left and right sides form a terminal group r. The electrical connector 100 also includes a plurality of power terminals (unnumbered) for transmitting power, which are disposed on one side of the injection block 2 in the left-right direction and accommodated in the housing 1.

[0040] See also Fig. 9 In the same differential terminal pair S, the spacing C1 between the two signal contact portions 34 is greater than the spacing C2 between the two signal elastic portions 33, the spacing C1 between the two signal contact portions 34 is greater than the spacing C3 between the two signal tail portions 32, the distance D1 between the two signal contact portions 34 is greater than the distance D2 between the two signal elastic portions 33, and the distance D1 between the two signal contact portions 34 is greater than the distance D3 between the two signal tail portions 32.

[0041] See also Figure 2 , 4 , 5, 9, within the same terminal group r, the spacing C4 between the two grounding tails 42 is smaller than the spacing C5 between the two grounding retaining portions 41, and the distance D4 between the two grounding tails 42 is also smaller than the distance D5 between the two grounding retaining portions 41. As for the two grounding terminals 4 adjacently arranged between two adjacent terminal groups r, the distance D6 between the two grounding tails 42 is larger than the distance D7 between the two grounding retaining portions 41, and the spacer block N extends downwardly into between the grounding bending portions 422 of the adjacent grounding tails 42 of the adjacent terminal groups r.

[0042] See also Figure 4 , 5 , 8, 9, within the same terminal group r, the distance between the wide portion 411 and the differential terminal pair S is smaller than the distance between the narrow portion 412 and the differential terminal pair S, so that the narrow portion 412 is away from the differential terminal pair S relative to the wide portion 411.

[0043] See also Figure 3 , 6, 7, 8, the lossy member 5 is made of conductive plastic. Of course, in other embodiments, the lossy member 5 can also be made of absorbing materials. The lossy member 5 is fixed between the two terminal rows R. The lossy member 5 includes a body P and a plurality of protrusions 54 extending from the body P along the front-to-back direction toward the ground holding portion 41. The protrusions 54 correspond to the ground holding portions 41 one by one, and the protrusions 54 are in direct contact with the narrow portion 412 to form electrical coupling. Of course, in other embodiments, the protrusions 54 may not be in direct contact with the narrow portion 412 but have a relatively small gap to form electrical coupling. The body P includes a base 51, a plurality of protrusions 52 extending upward from the base 51 and corresponding to the ground terminals 4 one by one, and a plurality of extensions 53 extending upward from the plurality of protrusions 52. The extensions 53 extend upward beyond the bottom surface of the slot 11 and correspond to the grounding elastic portions 43 one by one. The extensions 53 are lower than the grounding contact portions 44 to prevent the grounding contact portions 44 and the docking element 200 from contacting the extensions 53 after the docking element 200 is inserted. Looking downward, each extension 53 overlaps with the corresponding grounding elastic portion 43. In the front-to-back direction, the extension 53 is located between the grounding elastic portion 43 and the slot 11, and the extension 53 does not extend into the slot 11. 1 contacts the docking element 200 to prevent the extension portion 53 from affecting the docking element 200; the surface of the extension portion 53 facing the grounding elastic portion 43 is a first mating surface 531, the shape of the first mating surface 531 is adapted to the shape of the grounding elastic portion 43, and the distance between the first mating surface 531 and the grounding elastic portion 43 changes evenly, so that the extension portion 53 can better absorb noise and improve the high-frequency performance of the electrical connector 100; the surfaces of the first mating surface 531 and the grounding elastic portion 43 are both inclined straight surfaces. Of course, in other embodiments, the surfaces of the first mating surface 531 and the grounding elastic portion 43 can also be curved surfaces, etc., as long as the shapes of the two are adapted.

[0044] See also Figure 5 , 6 In the front-to-back direction, the distance between the extension portion 53 and the grounding elastic portion 43 is greater than the distance between the protrusion 54 and the grounding holding portion 41. The protrusion 54 contacts the grounding holding portion 41 to form a grounding loop. A larger gap is required between the extension portion 53 and the grounding elastic portion 43 to leave room for the grounding elastic portion 43 to swing. Therefore, the extension portion 53 and the grounding elastic portion 43 do not form an electrical coupling, so the amount of charge passing through the extension portion 53 is small and does not form a grounding loop. However, the extension portion 53 is close to the grounding elastic portion 43, which can increase the capacitive coupling at the position of the grounding elastic portion 43, and can absorb the noise between the signal terminals 3, thereby improving crosstalk.

[0045] See also Figure 6 , 8In the front-to-back direction, the distance between the loss member 5 and the wide portion 411 is greater than the distance between the protrusion 54 and the narrow portion 412, that is, the distance between the protrusion 52 and the wide portion 411 is greater than the distance between the protrusion 54 and the narrow portion 412, and there is a gap between the protrusion 52 and the wide portion 411. The protrusion 54 contacts the narrow portion 412, so that charges pass between the loss member 5 and the ground terminal 4 to form a ground loop, and the narrow portion 412 is away from the differential terminal pair S relative to the wide portion 411, so that the protrusion 54 and the signal The distance between the signal terminals 3 is increased, and the interference of the charge on the protrusion 54 to the signal terminal 3 is improved; there is a gap between the protrusion 52 and the wide portion 411 so that the wide portion 411 does not contact the protrusion 52, and the amount of charge passing through the protrusion 52 at the position of the wide portion 411 is very small. The protrusion 52 here is close to the wide portion 411, which can increase the capacitive coupling at the position of the wide portion 411 and absorb the noise between the signal terminals 3, improve crosstalk, and there is a gap between the wide portion 411 and the protrusion 52 to avoid the injection block 2.

[0046] See also Figure 2 , 3 , 5, 7, the plug 6 is fixed between the two terminal rows R, and the loss member 5 and the plug 6 are injection molded. The plug 6 includes a main body 61 and a plurality of protrusions 62 extending upward from the main body 61 and corresponding to the plurality of differential terminal pairs S. The upper end of the protrusion 62 is higher than the bottom surface of the slot 11 but not higher than the signal contact portion 34. There is a gap between the protrusion 62 and the signal elastic portion 33. Looking downward, each protrusion 62 overlaps with the two signal elastic portions 33 in the differential terminal pair S corresponding to it. In the front-to-back direction, the protrusion 62 is located between the signal elastic portion 33 and the slot 11, increasing the capacitance near the signal elastic portion 33, thereby being adjustable. Impedance, and there is a gap between the protrusion 62 and the signal elastic part 33 to leave room for the swing of the signal elastic part 33; the surface of the protrusion 62 facing the signal elastic part 33 is a second matching surface 621, and the shape of the second matching surface 621 is adapted to the shape of the signal elastic part 33. The distance between the second matching surface 621 and the signal elastic part 33 changes evenly, and the impedance will not change significantly, so that the impedance is matched; the second matching surface 621 and the surface of the signal elastic part 33 are both inclined straight surfaces. Of course, in other embodiments, the second matching surface 621 and the surface of the signal elastic part 33 can also be curved surfaces or the like, as long as the shapes of the two are adapted.

[0047] See also Figure 3 , 5 Each protrusion 62 corresponds to a guide groove 21, and each protrusion 62 has a hook 63 that cooperates with the injection block 2. The plug 6 is inserted between the two terminal rows R from bottom to top. The protrusion 62 extends upward from the injection block 2 along the guide groove 21, and the hook 63 cooperates with the upper surface of the injection block 2 to fix the plug 6 between the two terminal rows R.

[0048] See also Figure 6 , 7 , each protrusion 62 corresponds to a differential terminal pair S, and each extension 53 corresponds to a ground terminal 4, so the size of the protrusion 62 in the left-right direction is larger than the size of the extension 53; in the up-down direction, the extension 53 is lower than the protrusion 62. The size of the extension 53 in the left-right direction is small, and reducing the size of the extension 53 in the up-down direction can reduce the overall size of the protrusion 52 and the extension 53 in the up-down direction, thereby preventing the protrusion 52 and the extension 53 from being broken due to excessive length, and the loss component 5 may also absorb the signal transmitted from the signal terminal 3 to the receiving end (such as the system) while absorbing the noise between the signal terminals 3, so the insertion loss of the electrical connector 100 will increase, making the signal integrity (hereinafter referred to as SI) of the electrical connector 100 worse, the protrusion 52 is not set longer, so that the length of the extension 53 will not be too long, and the part of the extension 53 close to the signal terminal 3 will not be too much, thereby reducing the extension 53 absorbing the signal transmitted from the signal terminal 3 to the receiving end (such as the system), thereby optimizing the insertion loss of the electrical connector 100 and improving the SI performance of the electrical connector 100.

[0049] See also Figure 6 , 7 The extension portion 53 is close to the grounding elastic portion 43 to improve the long string, but the extension portion 53 may also absorb the signal transmitted from the signal terminal 3 to the receiving end (such as the system). In the front-to-back direction, the distance between the protrusion 62 and the signal elastic portion 33 is smaller than the distance between the extension portion 53 and the grounding elastic portion 43, which increases the distance between the grounding elastic portion 43 and the extension portion 53, and also increases the distance between the extension portion 53 and the signal terminal 3, thereby reducing the extension portion 53 absorbing the signal transmitted from the signal terminal 3 to the receiving end (such as the system), thereby optimizing the insertion loss of the electrical connector 100 and improving the SI performance of the electrical connector 100. Moreover, the portion of the protrusion 62 closer to the signal elastic portion 33 can form a hook 63 that cooperates with the injection molded block 2.

[0050] See also Figure 5 In the front-to-back direction, the protrusion 52, the extension 53 and the ridge 62 are all arranged outside the slot 11 and do not extend into the slot 11, and the distance between the protrusion 52 and the slot 11 and the distance between the extension 53 and the slot 11 are both greater than the distance between the ridge 62 and the slot 11. During the manufacturing process, the protrusion 52, the extension 53 and the ridge 62 may form a burr extending toward the slot 11. Therefore, the protrusion 52 and the ridge 62 do not extend into the slot 11 to prevent the burr from interfering with the docking element 200. The loss component 5 is conductive, and the loss component 5 is arranged farther away from the slot 11 to prevent the burr from contacting the docking element 200 and affecting it.

[0051] See also Figure 2 ,3 8, the metal sheet 7 is assembled and fixed between the terminal row R and the loss member 5, so as to isolate the signal terminal 3 and the loss member 5. Of course, in other embodiments, the metal sheet 7 can also be injection molded with the loss member 5, so as to be fixed between the terminal row R and the loss member 5. Each metal sheet 7 includes a plurality of slots 71 corresponding to the plurality of protrusions 54 and a plurality of isolation portions 72 corresponding to the plurality of differential terminal pairs S. The opening of the slot 71 is upward, the protrusion 54 passes through the slot 71 and contacts the narrow portion 412, and the isolation portion 72 is located between the differential terminal pair S and the protrusion 62.

[0052] See also Figure 7 , 8 In the left-right direction, two protrusions 52 are provided between two adjacent protrusions 62, and the size of the isolating portion 72 is larger than the size of the protrusion 62. When viewed along the front-to-back direction, each isolating portion 72 overlaps with a protrusion 62 and two protrusions 52 on the left and right sides of the protrusion 62, so that the area of ​​the metal sheet 7 isolating the loss component 5 and the signal terminal 3 is larger, and the isolation effect is better.

[0053] See also Figure 8 In the up and down direction, the isolation portion 72 is lower than the hook 63 but higher than the protrusion 54. The hook 63 can stop the isolation portion 72 to prevent the metal sheet 7 from moving upward. The isolation portion 72 is higher than the protrusion 54, so that the area where the metal sheet 7 isolates the loss component 5 and the signal terminal 3 is larger, and the isolation effect is better.

[0054] See also Figure 3 , 5 8. The metal sheet 7 has a plurality of fixing blocks 73 protruding toward the injection block 2 along the front-to-back direction and corresponding to the fixing grooves 22 one by one, and the distance D10 between the fixing grooves 22 and the lower surface of the injection block 2 is smaller than the distance D11 between the fixing grooves 22 and the upper surface of the injection block 2. The fixing grooves 22 cooperate with the fixing blocks 73 to fix the metal sheet 7 in the electrical connector 100, and the fixing grooves 22 are arranged at a lower position. When the metal sheet 7 is loaded from bottom to top between the injection block 2 and the loss component 5, the fixing blocks 73 begin to contact and interfere with the injection block 2 only after most of the metal sheet 7 is loaded. The time for the fixing blocks 73 to interfere with the injection block 2 is short, and the metal sheet 7 encounters less resistance during the loading process, thereby avoiding excessive scratches between the metal sheet 7 and the injection block 2.

[0055] See also Figure 3 , 5 8. The fixing block 73 is located below the slot 71. During the installation of the metal sheet 7, the slot 71 first cooperates with the protrusion 54 of the loss component 5 to position the metal sheet 7 to the correct position. Then, the metal sheet 7 is finally positioned and fixed between the injection block 2 and the loss component 5 through the cooperation of the fixing block 73 and the fixing slot 22.

[0056] See also Figure 2 , 3 8, the metal sheet 7 extends downward to form a plurality of solder pins 74 soldered to the surface of the circuit board 300, and the surface of the circuit board 300 is provided with a metal sheet pad 301 soldered to the solder pins 74 (i.e., the soldering method is SMT). Of course, in other embodiments, the circuit board 300 may also be provided with a hole that matches the solder pin 74, and the solder pin 74 is inserted into the hole (i.e., the soldering method is DIP). The solder pin 74 is connected to the ground layer (not shown) on the circuit board 300 through the metal sheet pad 301, and the ground tail 42 is also connected to the ground layer on the circuit board 300 through the ground pad 303, which optimizes the grounding path of the ground terminal 4 and makes it easier for noise to be transmitted.

[0057] See also Figure 4 , 5 8. When viewed along the front-to-back direction, the solder foot 74 is aligned with the ground tail 42 front to back. Compared with the case where the solder foot 74 and the ground tail 42 are offset in the front-to-back direction, when the solder foot 74 and the ground tail 42 are directly opposite each other in the front-to-back direction, the distance between the solder foot 74 and the ground terminal 4 is closer, which can optimize the circuit design of the ground layer of the circuit board 300 so that the noise can flow back to the ground layer quickly.

[0058] See also Figure 2 , 8 Compared with the integrated design of the metal sheet pad 301 and the ground pad 303, the metal sheet pad 301 and the ground pad 303 are spaced apart in the front-to-back direction and are not integrated, so that the solder can be distributed more evenly between the solder foot 74 and the ground tail 42 during the welding process, and it is less likely that most of the solder will flow to one of the solder foot 74 or the ground tail 42.

[0059] In summary, the electrical connector 100 of the present invention has the following beneficial effects:

[0060] (1) The inductive coupling between the signal elastic portion 33 and the grounding elastic portion 43 is large, resulting in large crosstalk. The base 51 of the loss member 5 extends an extension portion 53. When viewed in the front-to-back direction and when viewed downward, the extension portion 53 overlaps with the grounding elastic portion 43, so that the extension portion 53 is close to the grounding elastic portion 43, thereby increasing the capacitive coupling at the grounding elastic portion 43. According to the formula The size of the remote string is related to the difference between capacitive coupling and inductive coupling. Increasing the capacitive coupling actually means using more capacitive coupling to offset the inductive coupling, thus making the value in the above formula The value of is reduced to optimize the long string and improve the high frequency performance; and the loss component 5 can absorb the noise between the signal terminals 3. The setting of the extension portion 53 makes the loss component 5 correspond to a larger area of ​​the ground terminal 4, and the effect of absorbing the noise between the signal terminals 3 is better, thereby further improving the high frequency performance of the electrical connector 100.

[0061] (2) The lossy component 5 is electrically coupled to the ground terminal 4 of the electrical connector 100 to form a ground loop, thereby optimizing the shielding effect and reducing crosstalk. However, due to its material properties, the lossy component 5 absorbs the noise between the signal terminals 3 while also absorbing the signal transmitted from the signal terminal 3 to the receiving end (e.g., the system). Therefore, the insertion loss of the electrical connector 100 will increase, making the SI of the electrical connector 100 worse. A metal sheet 7 is added between the signal terminal 3 and the lossy component 5. The metal sheet 7 isolates the lossy component 5 from the signal terminal 3, so that the lossy component 5 will not absorb or reduce the signal transmitted from the signal terminal 3 to the receiving end (e.g., the system), thereby optimizing the insertion loss of the electrical connector 100 and improving the SI of the electrical connector 100.

[0062] (3) In the same differential terminal pair S, the spacing between the two signal contact portions 34 is greater than the spacing between the two signal elastic portions 33, the spacing between the two signal contact portions 34 is greater than the spacing between the two signal tail portions 32, the distance between the two signal contact portions 34 is greater than the distance between the two signal elastic portions 33, and the distance between the two signal contact portions 34 is greater than the distance between the two signal tail portions 32. This not only reduces the distance between the two signal terminals 3 in the differential terminal pair S to form a tight coupling, but also increases the distance between two adjacent differential terminal pairs S, thereby reducing crosstalk.

[0063] (4) In the same terminal group r, the distance between the two grounding tails 42 is smaller than the distance between the two grounding retaining portions 41, and the distance between the two grounding tails 42 of the two grounding terminals 4 is also smaller than the distance between the two grounding retaining portions 41. The grounding tails 42 are closer to the differential terminal pair S, thereby improving the crosstalk of the differential terminal pair S.

[0064] (5) With respect to two grounding terminals 4 adjacently arranged between two adjacent terminal groups r, the distance between the two grounding tails 42 is greater than the distance between the two grounding retaining portions 41, and the spacer block N is located between the adjacent grounding tails 42 of the adjacent terminal groups r, separating the adjacent differential terminal pairs S, thereby further reducing the crosstalk between the adjacent differential terminal pairs S.

[0065] The above detailed description is only an explanation of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. An electrical connector for docking a docking element, characterized in that: include: A housing including a slot for inserting the docking element, wherein the insertion direction of the docking element is defined as downward; A plurality of signal terminals and a plurality of ground terminals are accommodated in the housing and arranged side by side, wherein the arrangement direction of the signal terminals and the ground terminals is defined as a left-right direction, and each ground terminal comprises a ground holding portion, the ground holding portion is downwardly connected to a ground tail portion, the ground holding portion is upwardly connected to a ground elastic portion, and a ground contact portion is extended from the ground elastic portion to form an entry slot for contacting a docking element; A loss component is electrically coupled to the ground holding portion. The loss component includes a plurality of extension portions that extend upward beyond the bottom surface of the slot and correspond one to one with the ground elastic portion. The extension portions are lower than the ground contact portion. Looking downward, each extension portion overlaps with the corresponding ground elastic portion. In the front-to-back direction, the extension portions are located between the ground elastic portion and the slot.

2. The electrical connector according to claim 1, characterized in that: Two signal terminals adjacent to each other in the left-right direction form a differential terminal pair, and a grounding terminal adjacent to the differential terminal pair is distributed on both sides of the left and right sides, and the grounding holding portion includes a narrow portion and a wide portion located above the narrow portion. In the left-right direction, the size of the narrow portion is smaller than the size of the wide portion, and the distance between the wide portion and the adjacent differential terminal pair is smaller than the distance between the narrow portion and the adjacent differential terminal pair; the loss component includes a protruding portion extending toward the grounding holding portion relative to the extension portion and electrically coupled with the narrow portion. In the front-to-back direction, the distance between the loss component and the wide portion is greater than the distance between the protruding portion and the narrow portion, and the distance between the extension portion and the grounding elastic portion is also greater than the distance between the protruding portion and the narrow portion.

3. The electrical connector according to claim 1, wherein: Each signal terminal includes a signal retaining portion, the signal retaining portion is connected to a signal tail portion downwardly, the signal retaining portion is connected to a signal elastic portion upwardly, and a signal contact portion extending from the signal elastic portion to enter the slot is formed for contacting the docking element; the electrical connector also includes a plug, the plug and the loss component are injection molded, the plug has a main body and a plurality of protrusions extending upward from the main body, looking downward, each protrusion overlaps with at least one signal elastic portion, in the front-to-back direction, the protrusion is located between the signal elastic portion and the slot, each protrusion corresponds to two adjacent signal terminals, in the left-right direction, the size of the protrusion is larger than the size of the extension portion, and in the up-down direction, the extension portion is lower than the protrusion.

4. The electrical connector according to claim 3, characterized in that: The signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, which are distributed on both sides of the slot in the front-to-back direction. The loss component and the plug are arranged between the two terminal rows. The extension part and the protrusion are both arranged on the outside of the slot. In the front-to-back direction, the distance between the extension part and the slot is greater than the distance between the protrusion and the slot.

5. The electrical connector according to claim 3, characterized in that: The signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, and the two terminal rows are distributed on both sides of the slot along the front-to-back direction. The electrical connector also includes two injection-molded blocks, each of which is injection-molded with a corresponding terminal row. In the front-to-back direction, the distance between the protrusion and the signal elastic part is smaller than the distance between the extension part and the ground elastic part. Each protrusion extends toward the signal elastic part along the front-to-back direction to form a hook, and the hook cooperates with the upper surface of the injection-molded block to fix the plug to the injection-molded block.

6. The electrical connector according to claim 1, characterized in that: The signal terminal and the ground terminal are arranged in the left-right direction to form two terminal rows, and the two terminal rows are distributed on both sides of the slot in the front-to-back direction. Each grounding tail includes a grounding welding portion welded to the circuit board and a grounding bending portion connecting the grounding welding portion and the grounding holding portion. Two signal terminals adjacent to each other in the left-right direction form a differential terminal pair. A grounding terminal adjacent to the differential terminal pair is distributed on each of the left and right sides. The differential terminal pair and the grounding terminals adjacent to the left and right sides form a terminal group. The spacing between the two grounding tails in the same terminal group is smaller than the spacing between the two grounding holding portions. The electrical connector also includes two injection molded blocks, each injection molded block is injection molded with a corresponding terminal row, and a plurality of spacer blocks are arranged downwardly on the injection molded block, and each spacer block is located between two adjacent grounding bending portions.

7. The electrical connector according to claim 6, characterized in that: The outer shell is extended downwards to be provided with a plurality of dividing blocks, and the dividing blocks are aligned front and back with the spacing blocks.

8. The electrical connector according to claim 1, wherein: The signal terminal includes a signal holding portion, the signal holding portion is connected to a signal tail portion downwardly, the signal holding portion is connected to a signal elastic portion upwardly, a signal contact portion extending from the signal elastic portion to enter the slot, the signal contact portion is used to contact the docking element, in the front-to-back direction, the signal elastic portion is closer to the slot than the signal tail portion, the signal holding portion is flat and extends obliquely from bottom to top toward the slot.

9. The electrical connector according to claim 1, wherein: The signal terminal and the ground terminal are arranged in the front-to-back direction to form two terminal rows, the loss component is arranged between the two terminal rows, a metal sheet is arranged between the terminal row and the loss component, and the loss component passes through the metal sheet to be electrically coupled with the ground terminal.

10. The electrical connector according to claim 9, characterized in that: The grounding tail is welded to a surface of the circuit board, and the metal sheet is provided with a plurality of welding feet welded to the surface of the circuit board, and the welding feet are aligned with the grounding tail front and back.

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