Electric connector

Abstract

The utility model discloses an electric connector, comprising an insulation body comprising a first surface and a second surface opposite to each other front and back, and a side wall penetrating through a first terminal groove and a second terminal groove of the first surface; the grounding terminal is accommodated in the first terminal groove and comprises a grounding main body part, a grounding elastic part and a grounding contact part which are sequentially connected from bottom to top; the signal terminal is accommodated in the second terminal groove; a groove is concavely formed in the direction from the second surface to the first surface, the open groove penetrates through the second surface and is communicated with the first terminal groove front and back, the groove and the open groove are only filled with air, and the groove is communicated with the open groove up and down; the groove wall of the first terminal groove is provided with an inclined surface which obliquely extends in a direction close to the grounding elastic part, and the inclined surface inclines in a direction deviating from the groove from bottom to top; along the front-back direction, the projection of the grounding elastic part is overlapped with the projection of the groove, the projection of the open groove is overlapped with the projection of the grounding contact part, and at least part of the inclined surface is located between the grounding elastic part and the groove.

Description

Technical Field

[0001] The utility model relates to an electrical connector, in particular to an electrical connector for optimizing far-end crosstalk.

Background Art

[0002] Crosstalk, as a main factor affecting the signal integrity (hereinafter referred to as SI) performance of an electrical connector, designers need to consider minimizing crosstalk as much as possible during the design and manufacturing process to ensure the integrity of signal transmission. Generally speaking, crosstalk is usually reduced by increasing shielding, increasing the distance between signal conductors, reducing the facing area of signal conductors, and reducing the distance between the two signal conductors within a differential signal conductor pair to reduce the mutual capacitance and mutual inductance between signal conductors. More specifically, it can be used to optimize the far-end crosstalk FEXT (hereinafter referred to as far-end crosstalk) in crosstalk. However, due to the limited space of the electrical connector, when increasing shielding, it is necessary to further consider the internal space design of the electrical connector and whether the added shielding will affect the impedance of signal conductors, etc. For signal conductors, because more high-frequency parameters need to be considered, the limiting factors for reducing far-end crosstalk by adjusting signal conductors are more complex, and often the better design for optimizing far-end crosstalk will be sacrificed due to considering other factors (such as impedance, manufacturing process, etc.).

[0003] Therefore, it is necessary to design a new electrical connector for further optimizing far-end crosstalk to overcome the above problems.

Summary of the Utility Model

[0004] Aiming at the problems faced by the background art, the creative purpose of the utility model is to provide a structure for optimizing far-end crosstalk by changing the dielectric distribution around the grounding terminal. Specifically, a structure for changing the dielectric distribution around the grounding terminal is provided on the insulating body accommodating the grounding terminal.

[0005] To achieve the above purpose, the utility model adopts the following technical means:

[0006] An electrical connector, characterized in that it includes: an insulating body including a side wall having a first surface and a second surface arranged opposite to each other in the front and rear directions, and a first terminal groove and a second terminal groove penetrating the first surface, the first terminal groove and the second terminal groove being arranged left and right; a ground terminal correspondingly received in the first terminal groove, the ground terminal including a ground main body portion, a ground elastic portion obliquely extending upward from the ground main body portion, and a ground contact portion connected to the ground elastic portion, the ground contact portion protruding relative to the first surface to abut against a mating element; a signal terminal correspondingly received in the second terminal groove; a groove recessed from the second surface towards the first surface, and a slot penetrating the second surface and communicating with the first terminal groove in the front and rear directions, only air is filled in the groove and the slot, wherein the groove and the slot communicate with each other vertically; the groove wall of the first terminal groove has an inclined surface obliquely extending towards the direction close to the ground elastic portion, and the inclined surface is inclined away from the groove from bottom to top; along the front and rear directions, the projection of the ground elastic portion overlaps with the projection of the groove, the projection of the slot overlaps with the projection of the ground contact portion, and at least a part of the inclined surface is located between the ground elastic portion and the groove.

[0007] Further, the signal terminal includes a signal main body portion, a signal elastic portion obliquely extending upward from the signal main body portion, and a signal contact portion connected to the signal elastic portion, the signal contact portion protruding relative to the first surface to abut against a mating element, when viewed in the front and rear directions, a partition rib is provided between the ground contact portion and the signal contact portion, the partition rib is aligned with the slot in the front and rear directions, when viewed in the left and right directions, the groove wall of the first terminal groove is located below the partition rib, wherein, along the direction from the first surface to the second surface, the surface of the groove wall of the first terminal groove facing the groove exceeds the surface of the partition rib facing the slot.

[0008] Further, the groove includes a bottom surface and a connecting surface, one end of the connecting surface is connected to the surface of the groove wall of the first terminal groove facing the groove, and the other end is connected to the bottom surface, along the front and rear directions, the projection of the connecting surface coincides with a part of the projection of the inclined surface.

[0009] Further, the signal terminal includes a signal main body portion, a signal elastic portion obliquely extending upward from the signal main body portion, and a signal contact portion connected to the signal elastic portion, the signal contact portion protruding relative to the first surface to abut against a mating element, when viewed in the front and rear directions, a partition rib is provided between the ground contact portion and the signal contact portion, the partition rib is aligned with the slot in the front and rear directions, the surface of the partition rib facing the ground contact portion extends towards the ground terminal to form a convex portion, along the left and right directions, a part of the projection of the convex portion coincides with the projection of the ground contact portion.

[0010] Further, the inclined surface has an upper edge; the ground elastic portion has a shoulder, along the left and right directions, the ground elastic portion has a first width at the shoulder, the ground contact portion has a second width, wherein the first width is greater than the second width, and the upper edge extends upward beyond the shoulder.

[0011] Furthermore, the gap width between the grounding elastic part and the inclined surface does not exceed 0.05 mm.

[0012] Another technical solution of the present utility model is as follows:

[0013] An electrical connector, characterized in that it comprises: an insulating body including a side wall having a first surface and a second surface disposed opposite to each other in the front and rear, and a first terminal groove and a second terminal groove penetrating the first surface, the first terminal groove and the second terminal groove being disposed left and right; a grounding terminal correspondingly received in the first terminal groove, the grounding terminal including a grounding main body portion, a grounding elastic portion upwardly and obliquely extending from the grounding main body portion, and a grounding contact portion connected to the grounding elastic portion, the grounding contact portion protruding relative to the first surface to abut against a mating element; a signal terminal correspondingly received in the second terminal groove; a dielectric adjustment portion protruding from the groove wall of the first terminal groove in a direction close to the grounding elastic portion, a groove being recessed from the second surface to the first surface, a slot penetrating the second surface and communicating with the first terminal groove in the front and rear, only air being filled in the groove and the slot, wherein the groove and the slot communicate with each other up and down; along the front and rear direction, the projection of the grounding elastic portion overlaps with the projection of the groove, the projection of the slot overlaps with the projection of the grounding contact portion, and at least a part of the dielectric adjustment portion is located between the grounding elastic portion and the groove.

[0014] Furthermore, the signal terminal includes a signal main body portion, a signal elastic portion upwardly and obliquely extending from the signal main body portion, and a signal contact portion connected to the signal elastic portion, the signal contact portion protruding relative to the first surface to abut against a mating element, when viewed in the front and rear direction, a separation rib is provided between the grounding contact portion and the signal contact portion, the separation rib is aligned with the slot in the front and rear, and the groove wall of the first terminal groove is connected to the separation rib up and down, wherein, along the direction from the first surface to the second surface, the surface of the groove wall of the first terminal groove facing the groove exceeds the surface of the separation rib facing the slot.

[0015] Furthermore, the groove includes a bottom surface and a connecting surface, one end of the connecting surface is connected to the surface of the groove wall of the first terminal groove facing the groove, and the other end is connected to the bottom surface, along the front and rear direction, the projection of the connecting surface coincides with a part of the projection of the dielectric adjustment portion.

[0016] Furthermore, the signal terminal includes a signal main body portion, a signal elastic portion upwardly and obliquely extending from the signal main body portion, and a signal contact portion connected to the signal elastic portion, the signal contact portion protruding relative to the first surface to abut against a mating element, when viewed in the front and rear direction, a separation rib is provided between the grounding contact portion and the signal contact portion, the separation rib is aligned with the slot in the front and rear, and a convex portion extends from a side surface of the separation rib facing the grounding contact portion in the direction of the grounding terminal, along the left and right direction, a part of the projection of the convex portion coincides with the projection of the grounding contact portion.

[0017] Further, the dielectric adjustment part has an inclined surface facing the first terminal groove, and the inclined surface has an upper edge; the grounding elastic part has a shoulder, and in the left - right direction, the grounding elastic part has a first width at the shoulder, and the grounding contact part has a second width, wherein the first width is greater than the second width, and the upper edge extends upward beyond the shoulder.

[0018] Further, the dielectric adjustment part has an inclined surface facing the first terminal groove, and the gap width between the grounding elastic part and the inclined surface does not exceed 0.05 mm.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] Due to the self - capacitance (also called diagonal capacitance) generated by the stub effect of the grounding contact part and the stub effect of the signal terminal, the far - end crosstalk will be affected. The present utility model is provided with a dielectric adjustment part or an inclined surface, a groove formed by concavely setting from the second surface to the first surface, and a slot, and the groove and the slot are vertically communicated, and the slot and the first terminal groove are front - rear communicated. In the front - rear direction, a partial projection of the grounding elastic part also coincides with a partial projection of the groove, the projection of the slot coincides with the projection of the grounding contact part, and the inclined surface is located between the grounding elastic part and the groove and other structures and connection relationships, which change the distribution of the dielectric around the grounding terminal. Specifically, due to the above settings, the decrease amplitude of the self - capacitance (also called diagonal capacitance) generated by the stub effect of the grounding contact part and the stub effect of the signal terminal is greater than the decrease amplitude of the mutual capacitance generated by the signal terminal and the grounding terminal. Therefore, the ratio of the mutual capacitance C mL and the self - capacitance C L becomes larger, thus canceling more inductive coupling. Since the far - end crosstalk FEXT is related to the mutual capacitance C mL , the self - capacitance C L , the mutual inductance L mL , the self - inductance L L These factors are related. More specifically, the far - end crosstalk FEXT is proportional to the difference between the two ratios including the above factors, that is . Therefore, due to the decrease of this difference, the far - end crosstalk is also correspondingly reduced, thereby improving the SI performance of the electrical connector.

Description of the Drawings

[0021] Figure 1 is the three - dimensional exploded view of the electrical connector of the present utility model;

[0022] Figure 2 is the three - dimensional cross - sectional view of the electrical connector along the front - rear direction;

[0023] Figure 3 is Figure 2 the enlarged view of the A position in

[0024] Figure 4 is a plane cross-sectional view of the electrical connector in the front-rear direction;

[0025] Figure 5 is Figure 4 an enlarged view of part B in

[0026] Figure 6 the front view of the ground terminal.

[0027] Explanation of the reference numerals in the drawings of the specific embodiments:

[0028] Electrical connector 100 Insulating body 1 Receiving groove 11 Side wall 12 First surface 121 Second surface 122 First terminal groove 123 Groove wall 1231 Dielectric adjustment portion 1231a Inclined surface P Upper edge P1 Partition rib 124 Protrusion 1241 Second terminal groove 125 Groove 126 Bottom surface 1261 Connection surface 1262 Slot 127 Terminal module 2 Insulating block 21 Ground terminal 22 Ground main body portion 221 Ground elastic portion 222 Shoulder 2221 Ground contact portion 223 Signal terminal 23 Signal main body portion 231 Signal elastic portion 232 Signal contact portion 233 First width W1 Second width W2 Gap S

Specific Embodiments

[0029] For better understanding of the purpose, structure, features, and effects of the present utility model, the present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0030] As Figures 1 to 5 shown, for the electrical connector 100 of the present utility model, the front-rear direction is defined as the X-axis, the up-down direction is defined as the Y-axis, and the left-right direction is defined as the Z-axis. Please note that the up-down, left-right directions of the present utility model are only for better understanding of the implementation scheme of the present utility model, rather than a limitation to the present utility model (the insertion direction of the electrical connector of the present utility model and the docking element is upward). Therefore, the electrical connector 100 involved in the present utility model can be any one of vertical, horizontal, right-angle connectors, etc.

[0031] As Figure 1 shown, the electrical connector 100 of the present utility model includes an insulating body 1 and two terminal modules 2 received in the insulating body 1. Each terminal module 2 includes differential signal terminal pairs and ground terminals 22 arranged alternately in the left-right direction, and an insulating block 21 covering the ground terminals 22 and the differential signal terminal pairs. A differential signal terminal pair includes two signal terminals 23.

[0032] As Figures 1 to 3 shown, the ground terminal 22 includes a ground main body portion 221, a ground elastic portion 222 extending obliquely upward from the ground main body portion 221, and a ground contact portion 223 connected to the ground elastic portion 222. The ground elastic portion 222 has a shoulder 2221; the signal terminal 23 includes a signal main body portion 231, a signal elastic portion 232 extending obliquely upward from the signal main body portion 231, and a signal contact portion 233 connected to the signal elastic portion 232.

[0033] As Figures 1 to 3As shown, the insulating body 1 has two side walls 12 arranged at intervals in the front and rear directions and a receiving groove 11 located between the two side walls 12. The receiving groove 11 receives the docking element, such as a docking PCB or a docking tongue plate; each side wall 12 includes a plurality of first terminal grooves 123 and a plurality of second terminal grooves 125, and a first surface 121 and a second surface 122 arranged opposite to each other in the front and rear directions. A groove 126 is recessed from the second surface 122 towards the first surface 121. A slot 127 penetrates the second surface and communicates with the first terminal groove 123 in the front and rear directions. The groove 126 includes a bottom surface 1261 and a connecting surface 1262. Only air is filled in the groove 126 and the slot 127. Among them, the groove 126 communicates with the slot 127 vertically, and the slot 127 communicates with the first terminal groove 123 in the front and rear directions..

[0034] As Figure 3 and Figure 5 shown, the first terminal grooves 123 and the second terminal grooves 125 are arranged left and right. The grounding terminal 22 is correspondingly received in the first terminal groove 123, and the signal terminals are correspondingly received in the second terminal grooves 125; the first terminal grooves 123 and the second terminal grooves 125 penetrate the first surface 121. The signal contact portions 233 and the grounding contact portions 223 in the same row left and right all protrude relative to the first surface 121 to abut against the docking element; each first terminal groove 123 includes a groove wall 1231, and the groove wall 1231 includes a dielectric adjustment portion 1231a. The dielectric adjustment portion 1231a is convexly formed towards the direction close to the grounding elastic portion 222, and the dielectric adjustment portion 1231a has an inclined surface P. The inclined surface P is arranged facing the first terminal groove 123. From the grounding main body portion 221 towards the grounding elastic portion 222, the inclined surface P extends obliquely in the direction away from the groove 126. The inclined surface P has an upper edge P1;

[0035] As Figure 3 and Figure 6 shown, along the left and right direction, the grounding elastic portion 222 has a first width W1 at the shoulder 2221, and the grounding contact portion 223 has a second width W2, where the first width W1 is greater than the second width W2, and the upper edge P1 extends upward beyond the shoulder 2221; one end of the connecting surface 1262 is connected to the surface of the groove wall 1231 of the first terminal groove 123 facing the groove 126, and the other end is connected to the bottom surface 1261. Along the front and rear direction, the projection of the connecting surface 1262 coincides with a part of the projection of the inclined surface P; along the front and rear direction, the projection of the grounding elastic portion 222 overlaps with the projection of the groove 126, the projection of the slot 127 overlaps with the projection of the grounding contact portion 223, and a part of the inclined surface P is located between the grounding elastic portion 222 and the groove 126. Among them, in order to achieve the most ideal far-end crosstalk optimization effect, the width of the gap S between the grounding elastic portion 222 and the inclined surface P does not exceed 0.05 millimeters.

[0036] As Figure 3 andFigure 5 As shown, when viewed in the front-rear direction, a separating rib 124 is provided between the ground contact portion 223 and the signal contact portion 233. The separating rib 124 is aligned with the slot 127 in the front-rear direction, and a convex portion 1241 is formed by extending the surface of the separating rib 124 facing the ground contact portion 223 towards the ground terminal 22. In the left-right direction, a partial projection of the convex portion 1241 coincides with the projection of the ground contact portion 223. Additionally, when viewed in the left-right direction, the groove wall 1231 of the first terminal groove 123 is located below the separating rib 124, wherein, in the direction from the first surface 121 to the second surface 122, the surface of the groove wall 1231 of the first terminal groove 123 facing the groove 126 extends beyond the surface of the separating rib 124 facing the slot 127.

[0037] In summary, the present utility model has the following beneficial effects:

[0038] 1. The self-capacitance (also called diagonal capacitance) generated by the stub effect of the ground contact portion 223 and the stub effect of the signal terminal 23 will affect the far-end crosstalk. The present utility model forms a groove 126 and a slot 127 by providing a dielectric adjustment portion 1231a or an inclined surface P and recessing in the direction from the second surface 122 to the first surface 121, and the groove 126 and the slot 127 communicate with each other vertically, and the slot 127 communicates with the first terminal groove 123 in the front-rear direction. In the front-rear direction, a partial projection of the ground elastic portion 222 also coincides with a partial projection of the groove 126, and the projection of the slot 127 coincides with the projection of the ground contact portion 223, and the inclined surface P is located between the ground elastic portion 222 and the groove 126 and other structures and connection relationships, which change the distribution of the dielectric around the ground terminal 22. Specifically, due to the above settings, the decrease in the self-capacitance (also called diagonal capacitance) generated by the stub effect of the ground contact portion 223 and the stub effect of the signal terminal 23 is greater than the decrease in the mutual capacitance generated by the signal terminal 23 and the ground terminal 22. Therefore, the ratio of the mutual capacitance C mL and the self-capacitance C L thus becomes larger, thereby canceling out more inductive coupling. Since the far-end crosstalk FEXT is related to the mutual capacitance C mL , the self-capacitance C L , the mutual inductance L mL , the self-inductance L L and these factors, more specifically, the far-end crosstalk FEXT is proportional to the difference between the two ratios including the above factors, that is . Therefore, due to the decrease in this difference, the far-end crosstalk is also correspondingly reduced, thereby improving the SI performance of the electrical connector 100.

[0039] 2. In the direction from the first surface 121 to the second surface 122, the surface of the groove wall 1231 of the first terminal groove 123 facing the groove 126 extends beyond the surface of the partition rib 124 facing the slot 127, so that the thickness of the side wall 12 of the insulating body 1 will not become too thin due to the setting of the groove 126, resulting in insufficient strength. In addition, this design actually further adjusts the distribution of the dielectric around the ground terminal 22, ultimately achieving the purpose of optimizing the SI performance of the electrical connector 100.

[0040] 3. On the one hand, the setting of the connection surface 1262 is conducive to the demolding of the mold used to form the groove 126. On the other hand, for the ground terminal 22, along the front-rear direction, the projection of the connection surface 1262 coincides with a partial projection of the inclined surface P, which is equivalent to further fine-tuning the distribution of the dielectric in its vicinity, ultimately achieving the purpose of optimizing the SI performance of the electrical connector 100.

[0041] 4. In order to further adjust the distribution of the dielectric around the ground terminal 22, specifically at the position of the ground contact portion 223, the partition rib 124 is provided with a convex portion 1241 in the left-right direction, thereby further adjusting the distribution of the dielectric at the position of the ground contact portion 223, ultimately achieving the purpose of optimizing the SI performance of the electrical connector 100.

[0042] 5. The upper edge P1 of the inclined surface P is raised upward beyond the shoulder 2221, that is, the position of the wider shoulder 2221 is set to face the inclined surface P. Therefore, for the ground terminal 22, most of its area will be more significantly affected by the change in the dielectric distribution due to the inclined surface P, ultimately achieving the purpose of optimizing the SI performance of the electrical connector 100.

[0043] The above detailed description is only for the description of the preferred embodiments of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the content of this creative specification and drawings are included in the patent scope of this creation.

Claims

1. An electrical connector, characterized in that: include: An insulating body, comprising a side wall, the side wall having a first surface and a second surface arranged opposite to each other, and a first terminal groove and a second terminal groove penetrating the first surface, the first terminal groove and the second terminal groove being arranged left and right; A grounding terminal, correspondingly received in the first terminal groove, comprising a grounding main body, a grounding elastic part extending upwardly from the grounding main body, and a grounding contact part connected to the grounding elastic part, the grounding contact part protruding relative to the first surface to abut against a docking element; The signal terminal is correspondingly received in the second terminal slot; A groove is formed from the second surface toward the first surface, and a groove is penetrated through the second surface and connected to the first terminal groove front and back, and the groove and the groove are only filled with air, wherein the groove is connected to the groove up and down; the groove wall of the first terminal groove has an inclined surface extending in a direction close to the grounding elastic part, and the inclined surface is inclined from bottom to top in a direction away from the groove; Along the front-to-back direction, the projection of the grounding elastic part overlaps with the projection of the groove, the projection of the slot overlaps with the projection of the grounding contact part, and at least part of the inclined surface is located between the grounding elastic part and the groove.

2. The electrical connector according to claim 1, wherein: The signal terminal includes a signal main body, a signal elastic part extending upward from the signal main body, and a signal contact part connected to the signal elastic part. The signal contact part protrudes relative to the first surface to abut against a docking element. When viewed in the front-to-back direction, a partition rib is provided between the ground contact part and the signal contact part. The partition rib is aligned with the slot front-to-back. When viewed in the left-to-right direction, the slot wall of the first terminal slot is located below the partition rib, wherein, along the direction from the first surface to the second surface, the surface of the slot wall of the first terminal slot facing the groove exceeds the surface of the partition rib facing the slot.

3. The electrical connector according to claim 1, wherein: The groove includes a bottom surface and a connecting surface, one end of the connecting surface is connected to the surface of the groove wall of the first terminal groove facing the groove, and the other end is connected to the bottom surface. Along the front-to-back direction, the projection of the connecting surface coincides with the partial projection of the inclined surface.

4. The electrical connector according to claim 1, wherein: The signal terminal includes a signal main body, a signal elastic part extending upward from the signal main body, and a signal contact part connected to the signal elastic part. The signal contact part protrudes relative to the first surface to abut against a docking element. When viewed along the front-to-back direction, a partition rib is arranged between the ground contact part and the signal contact part. The partition rib is aligned with the groove front-to-back. The surface of the partition rib facing the ground contact part extends toward the direction of the ground terminal to form a convex part. Along the left-right direction, a partial projection of the convex part coincides with the projection of the ground contact part.

5. The electrical connector according to claim 1, wherein: The inclined surface has an upper edge; the grounding elastic portion has a shoulder, along the left and right directions, the grounding elastic portion has a first width at the shoulder, the grounding contact portion has a second width, wherein the first width is greater than the second width, and the upper edge exceeds the shoulder upward.

6. The electrical connector according to claim 1, wherein: The width of the gap between the grounding elastic portion and the inclined surface does not exceed 0.05 mm.

7. An electrical connector, characterized in that: include: An insulating body, comprising a side wall, the side wall having a first surface and a second surface arranged opposite to each other, and a first terminal groove and a second terminal groove penetrating the first surface, the first terminal groove and the second terminal groove being arranged left and right; A grounding terminal, correspondingly received in the first terminal groove, comprising a grounding main body, a grounding elastic part extending upwardly from the grounding main body, and a grounding contact part connected to the grounding elastic part, the grounding contact part protruding relative to the first surface to abut against a docking element; The signal terminal is correspondingly received in the second terminal slot; The slot wall of the first terminal slot has a dielectric adjustment portion protruding in a direction close to the grounding elastic portion, a groove is formed from the second surface toward the first surface, and a slot is penetrated through the second surface and connected to the first terminal slot front and back, and the groove and the slot are only filled with air, wherein the groove is connected to the slot up and down; Along the front-to-back direction, the projection of the grounding elastic part overlaps with the projection of the groove, the projection of the slot overlaps with the projection of the grounding contact part, and at least part of the dielectric adjustment part is located between the grounding elastic part and the groove.

8. The electrical connector according to claim 7, wherein: The signal terminal includes a signal main body, a signal elastic part extending upward from the signal main body, and a signal contact part connected to the signal elastic part. The signal contact part protrudes relative to the first surface to abut against a docking element. When viewed along the front-to-back direction, a partition rib is provided between the ground contact part and the signal contact part. The partition rib is aligned with the slot front-to-back. The slot wall of the first terminal slot is connected to the partition rib up and down. In the direction from the first surface to the second surface, the surface of the slot wall of the first terminal slot facing the groove exceeds the surface of the partition rib facing the slot.

9. The electrical connector according to claim 7, wherein: The groove includes a bottom surface and a connecting surface, one end of the connecting surface is connected to the surface of the groove wall of the first terminal groove facing the groove, and the other end is connected to the bottom surface. Along the front-to-back direction, the projection of the connecting surface coincides with the partial projection of the dielectric adjustment part.

10. The electrical connector according to claim 7, wherein: The signal terminal includes a signal main body, a signal elastic part extending upward from the signal main body, and a signal contact part connected to the signal elastic part. The signal contact part protrudes relative to the first surface to abut against a docking element. When viewed along the front-to-back direction, a partition rib is arranged between the ground contact part and the signal contact part. The partition rib is aligned with the groove front-to-back. A side surface of the partition rib facing the ground contact part extends toward the direction of the ground terminal to form a convex part. Along the left-right direction, a partial projection of the convex part coincides with the projection of the ground contact part.

11. The electrical connector according to claim 7, wherein: The dielectric adjustment portion has an inclined surface facing the first terminal groove, and the inclined surface has an upper edge; the grounding elastic portion has a shoulder, and along the left and right directions, the grounding elastic portion has a first width at the shoulder, and the grounding contact portion has a second width, wherein the first width is greater than the second width, and the upper edge exceeds the shoulder upward.

12. The electrical connector according to claim 7, wherein: The dielectric adjustment portion has an inclined surface facing the first terminal groove, and the gap width between the grounding elastic portion and the inclined surface does not exceed 0.05 mm.

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