Electric connector

Abstract

The utility model discloses an electric connector, the electric connector comprises an insulation body, a plurality of differential signal terminals and a plurality of grounding terminals, the plurality of differential signal terminals and the plurality of grounding terminals are fixed on the insulation body, the insulation body comprises a base part and a lingual plate, contact parts of the differential signal terminals are exposed on the lingual plate, connecting parts and fixing parts extend from the contact parts, the base part is concavely provided with a plurality of grooves, and the grooves are arranged in the grooves. The fixing part is embedded in the base part and is partially exposed in the groove, the widths of the connecting parts and the fixing part are smaller than the widths of the contact parts so as to improve the impedance of the connecting parts and the fixing part, and the distance between every two adjacent connecting parts is smaller than the distance between every two adjacent contact parts so as to form tight coupling; the distance between the two adjacent fixing parts is smaller than the distance between the two adjacent connecting parts so as to further reinforce tight coupling, so that the integral impedance of the differential signal terminal is balanced, and crosstalk interference between different signals is reduced at the same time.

Description

[Technical field]

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

[0002] An existing electrical connector includes an insulating body and a plurality of differential signal terminals and a plurality of grounding terminals fixed to the insulating body, the insulating body includes a base and a tongue plate, wherein the differential signal terminal has a contact portion and a fixing portion extending from the contact portion, the contact portion is exposed on the surface of the tongue plate, the fixing portion is embedded in the base, the base is correspondingly provided with a plurality of grooves, and the fixing portion is partially exposed in the grooves, two adjacent fixing portions are offset inwardly relative to their two adjacent contact portions, and the distance between the two fixing portions is kept unchanged.

[0003] However, since the fixed portion of the differential signal terminal is at a low impedance point relative to its contact portion, the existing connector only relies on exposing the fixed portion through the groove to adjust the impedance, which is a single method and therefore cannot well adjust the overall impedance balance of the signal terminal. In addition, the distance between the differential signal terminal pairs only changes once, resulting in poor tight coupling effect and poor improvement effect on crosstalk interference between the differential signal terminal pairs, resulting in poor high-frequency performance of the electrical connector, which cannot meet the requirements of the new generation of higher transmission rates.

[0004] Therefore, it is necessary to design an improved electrical connector to solve the above technical problems. [Utility Model Content]

[0005] In view of the problems of the background technology, the purpose of the utility model is to provide an electrical connector with a contact portion extending a connecting portion and a fixing portion of a differential signal terminal, wherein two adjacent connecting portions are tightly coupled and two adjacent fixing portions are further tightly coupled, so as to balance the impedance of the differential signal terminal and reduce crosstalk interference.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electrical connector, comprising an insulating body, the insulating body comprising a base and a tongue plate protruding from the base, and a plurality of grooves are recessed from the base at intervals; at least two differential signal terminals and at least one grounding terminal are fixed to the insulating body, the differential signal terminal comprises a contact portion, the contact portion is exposed on the surface of the tongue plate, a connecting portion extends from the contact portion toward the base and a fixing portion extends from the connecting portion, the connecting portion is exposed from the tongue plate and extends into the base, the fixing portion is embedded in the base and partially exposed in the groove, the widths of the connecting portion and the fixing portion are both smaller than the width of the contact portion, the distance between the two connecting portions of two adjacent differential signal terminals is smaller than the distance between the two contact portions, and the distance between the two fixing portions is smaller than the distance between the two connecting portions.

[0007] Furthermore, a first offset portion and a second offset portion extend in sequence from the fixed portion, a welding portion extends from the second offset portion, the widths of the first offset portion and the second offset portion are greater than the width of the fixed portion, the welding portion extends out of the base, the distance between two adjacent welding portions is greater than the distance between two adjacent second offset portions and greater than the distance between two adjacent first offset portions, and the distance between two adjacent first offset portions is equal to the distance between two adjacent fixed portions.

[0008] Furthermore, the distance between the front end portion of the differential signal terminal and the front end surface of the tongue plate is greater than the distance between the front end portion of the ground terminal and the front end surface of the tongue plate, and a slope is provided on the side edge of the tongue plate, which connects the front end surface of the tongue plate and the side surface of the tongue plate, and the front end portion of the differential signal terminal is further back than the slope, and the front end portion of the ground terminal overlaps with the slope along the width direction of the tongue plate.

[0009] Furthermore, the plastic on the front end surface of the tongue plate extends continuously to the front end portion of the differential signal terminal to form a continuous plastic filling area.

[0010] Furthermore, a metal shell is covered on the outside of the insulating body, and each side wall of the metal shell encloses a plug-in cavity. The tongue plate is located in the plug-in cavity. The front end of the side wall of the metal shell has a guide surface inclined inward, and two anti-fool columns protrude from the base. The two anti-fool columns are respectively located on the two outer sides of the metal shell, and the guide surface is closer to the front than the inclined surface.

[0011] Furthermore, the distance between the front end portion of the differential signal terminal and the front surface of the base is 3.0-3.25 mm.

[0012] Furthermore, the differential signal terminal and the ground terminal are each provided in plurality to form two rows of terminals arranged on opposite sides of the tongue plate, the ground terminal includes a docking portion and a widened portion extending from the docking portion, the docking portion is exposed on the surface of the tongue plate, the widened portion is partially exposed on the tongue plate and extends into the base, the width of the docking portion is greater than the width of the contact portion, and the widened portion in one row of terminals shields two adjacent connecting portions and two adjacent fixing portions in another row of terminals.

[0013] Furthermore, the head of the differential signal terminal is straight and has a smaller thickness than other parts of the differential signal terminal. The thickness of the differential signal terminal excluding the head is 0.12-0.14 mm.

[0014] Furthermore, an intermediate shielding plate is embedded in the insulating body and located between two rows of terminals, the distance between the two contact portions of two adjacent differential signal terminals and the intermediate shielding plate is equal to the distance between the two fixed portions thereof and the intermediate shielding plate, the widened portion has a widest point, and a plurality of the widest points are welded to the intermediate shielding plate.

[0015] Furthermore, a plurality of grooves are recessed from the top surface of the base, and two card slots are recessed from both sides of the base, the card slots are not connected to the plurality of grooves, the intermediate shielding sheet has two abutment portions respectively exposed in the two card slots, the outer side of the insulating body is covered with a metal shell, the metal shell is recessed with two windows, two buckles extend from the side edges of the two windows and are respectively engaged with the two card slots, the two abutment portions are respectively exposed in the two windows, and the two abutment portions abut against the inner side of the metal shell and are electrically connected.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the width of the connecting portion and the fixing portion is smaller than the width of the contact portion thereof, and the impedance of the connecting portion and the fixing portion is improved by reducing the cross-sectional area of ​​the current passing through the connecting portion and the fixing portion; the fixing portion is embedded in the base and partially exposed in the groove, and the fixing portion is exposed in the air, so that the dielectric constant is reduced and the impedance at the fixing portion is improved; the distance between the two connecting portions of two adjacent differential signal terminals is smaller than the distance between the two contact portions thereof, so that the two connecting portions are tightly coupled relative to the two contact portions thereof, and the impedance at the connecting portion is improved; the distance between the two fixing portions is smaller than the distance between the two connecting portions so that the two fixing portions are further tightly coupled, and the impedance at the fixing portion is further improved, so that the impedance between the contact portion, the connecting portion, and the fixing portion of the differential signal terminal is balanced, and the overall impedance matching of the differential signal terminal is achieved, and at the same time, the mutual inductance between the differential signal terminal and other signals (other differential signals or single-ended signals) is reduced, thereby reducing the crosstalk interference between different signals, so that the signal can be transmitted stably.

Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional schematic diagram of a first embodiment of the electrical connector of the utility model;

[0018] Figure 2 This is a perspective exploded view of the first embodiment of the electrical connector of the utility model;

[0019] Figure 3 for Figure 2 Enlarged view of circled area A;

[0020] Figure 4It is a top view of the first embodiment of the electrical connector of the utility model with the metal housing omitted;

[0021] Figure 5 This is a top view of only the upper row of terminals of the first embodiment of the electrical connector of the utility model;

[0022] Figure 6 This is a rear view of only the upper row of terminals and the lower row of terminals of the first embodiment of the electrical connector of the utility model;

[0023] Figure 7 It is a cross-sectional schematic diagram of a first embodiment of the electrical connector of the utility model;

[0024] Figure 8 Another cross-sectional view of the first embodiment of the electrical connector of the utility model;

[0025] Fig. 9 It is a perspective exploded view of the second embodiment of the electrical connector of the utility model;

[0026] Fig.10 It is a top view of the second embodiment of the electrical connector of the present invention.

[0027] Description of the accompanying drawings for the specific implementation:

[0028] [Specific implementation method]

[0029] In order to facilitate a better understanding of the purpose, structure, characteristics and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figures 1 to 10 As shown, the electric connector 100 provided by the utility model is installed on the circuit board 6. The electric connector 100 includes an insulating body 1, the insulating body 1 includes a base 11 and a tongue plate 12 protruding forward from the base 11, a plurality of differential signal terminals 2 and a plurality of grounding terminals 3 are fixed to the insulating body 1 and are respectively located on both sides of the tongue plate 12 to form two rows of terminals, an intermediate shielding sheet 4 is embedded in the insulating body 1 and is located between the upper and lower rows of terminals, a metal shell 5 is covered on the outside of the insulating body 1, and the metal shell 5 is surrounded by a plug-in cavity 51 for the insertion of the docking connector 200. The front-to-back direction is defined as the X-axis direction in the figure, the positive direction of the X-axis is the front, the left-right direction is the Y-axis direction in the figure, the positive direction of the Y-axis is the right, and the up-down direction is the Z-axis direction in the figure, the positive direction of the Z-axis is the top. Figures 1 to 8 This is the first embodiment of the electrical connector 100 of the present invention. Figures 9 and 10 This is the second embodiment of the electrical connector 100 of the present invention.

[0031] like Figure 2As shown, both the upper row of terminals and the lower row of terminals have multiple differential signal terminals 2 and multiple grounding terminals 3. In a row of terminals, two adjacent differential signal terminals 2 constitute a differential signal pair. The grounding terminal 3 is arranged between two adjacent differential signal pairs to suppress the crosstalk interference between the two adjacent differential signal pairs. The lower row of terminals and the middle shielding sheet 4 are arranged at intervals and embedded in an insulating rubber core P by one-time injection molding. The upper row of terminals are then placed on the upper side of the insulating rubber core P and are formed into an insulating body 1 by secondary injection molding, and then the metal shell 5 is assembled with the insulating body 1.

[0032] like Figure 4 and Figure 5 As shown, the differential signal terminal 2 includes a contact portion 21, which is exposed on the surface of the tongue plate 12. A connecting portion 22 is extended backward from the contact portion 21, and a portion of the connecting portion 22 is partially exposed on the surface of the tongue plate 12. The connecting portion 22 extends backward and is embedded in the plastic of the base 11. A fixing portion 23 is further extended backward from the connecting portion 22. The fixing portion 23 is embedded in the base 11. A plurality of grooves 111 are recessed from the top and bottom sides of the base 11 and are spaced apart. The plurality of fixing portions 23 are partially exposed in the plurality of grooves 111, respectively, so that the plurality of fixing portions 23 are exposed to the air. The widths of the connecting portion 22 and the fixing portion 23 are both smaller than the width of the contact portion 21. Two adjacent differential signal terminals 2 form a differential signal pair. Two adjacent connecting portions 22 in the differential signal pair are offset inwardly relative to their two contact portions 21, so that the distance D2 between the two adjacent connecting portions 22 is smaller than the distance D1 between the two contact portions 21. Tight coupling is formed between the two differential signal terminals 2, and the capacitance is reduced, thereby increasing the impedance at the connecting portion 22. The inductance of the differential signal pair as a whole is also reduced, thereby reducing the crosstalk interference between different differential signal pairs. Two adjacent fixed portions 23 are further offset inwardly relative to their two connecting portions 22, so that the distance D3 between the two adjacent fixed portions 23 is smaller than the distance D2 between the two connecting portions 22. Therefore, the two differential signal terminals 2 are further tightly coupled relative to their connecting portions 22 at the fixed portions 23, thereby further increasing the impedance of the fixed portions 23 and reducing the crosstalk interference between different differential signal pairs. The inward offset mentioned in this article refers to an offset close to the center of the differential signal pair, and conversely, the outward offset refers to an offset away from the center of the differential signal pair. Figure 6As shown, each differential signal terminal 2 is provided with a soldering portion 26 behind the fixing portion 23, and the multiple soldering portions 26 of the upper row differential signal terminals 2 and the lower row differential signal terminals 2 extend out of the base 11 to be soldered to the circuit board 6. Further, the upper row differential signal terminals 2 sequentially extend a first offset portion 24 and a second offset portion 25 downward from the fixing portion 23, the widths of the first offset portion 24 and the second offset portion 25 are both greater than the widths of the fixing portion 23, the outer edge of the first offset portion 24 is offset outward relative to the outer edge of the fixing portion 23, and the second offset portion 25 is offset outward relative to the first offset portion 24 as a whole, the distance D6 between two adjacent soldering portions 26 in the upper row differential signal terminals 2 is greater than the distance D5 between two adjacent second offset portions 25, and is greater than the distance D4 between two adjacent first offset portions 24, so that the distance between two adjacent differential signal terminals 2 is increased from the small spacing D3 at the fixing portion 23, through the first offset portion 24, the second offset portion 25, and the first offset portion 25. The shifting portion 25 is deflected outward twice and gradually widens to a large spacing D6 at the soldering portion 26 to match the circuit board 6, that is, the spacing between the two differential signal terminals 2 is gradually adjusted by two width changes, avoiding impedance mutation caused by excessive outward deflection at one time, and the distance D4 between two adjacent first offset portions 24 is equal to the distance D3 between two adjacent fixed portions 23, maintaining the two differential signal terminals 2 at the first offset portions 24 to maintain tight coupling to reduce crosstalk interference between different differential signal pairs, and the widths of the second offset portion 25 and the first offset portion 24 are also greater than the width of the soldering portion 26, thereby enhancing the structural strength of the differential signal terminal 2 and facilitating maintaining the positive position of the soldering portion 33 during injection molding positioning.

[0033] like Figure 4 and Figure 5 As shown, the ground terminal 3 includes a butt joint portion 31 exposed on the surface of the tongue plate 12, the width of the butt joint portion 31 is greater than the width of the contact portion 21, and a widened portion 32 is formed by extending backward from the butt joint portion 31, and the width of the widened portion 32 is greater than the width of the butt joint portion 31. The widened portion 32 is partially exposed on the surface of the tongue plate 12 and extends backward to be embedded in the base 11, and a welding foot is extended downward from the widened portion 32 to be exposed outside the base 11, as shown in FIG. Figure 5 and Figure 8 As shown, the widened portion 32 of the upper row grounding terminal 3 can shield the adjacent two fixing portions 23 of the two adjacent differential signal terminals 2 in the lower row, and the outer edges of the two connecting portions 22 are flush with the outer edges of the two fixing portions 23, so that the widened portion 32 of the upper row grounding terminal 3 can also correspondingly shield the adjacent two connecting portions 22 of the two adjacent differential signal terminals 2 in the lower row, and vice versa, the widened portion 32 of the lower row grounding terminal 3 can shield the adjacent two connecting portions 22 and two fixing portions 23 of the two adjacent differential signal terminals 2 in the upper row. The widened portion 32 has a widest portion 321, and the widest portion 321 has the greatest strength. At the widest portion 321, it is stamped to protrude toward one side of the middle shielding sheet 4 and abut against the middle shielding sheet 4, and as shown in FIG. Figure 7 and Figure 8 As shown, the widest part 321 is also exposed inside the groove 111 and outside, so that the external laser can directly irradiate the widest part 321, so that multiple widest parts 321 are spot-welded to the middle shielding sheet 4 to achieve electrical connection. The groove 111 exposing the widest part 321 and the groove 111 exposing the fixing part 23 are separated by ribs 112. The ribs 112 enhance the structural strength of the base 11 where multiple grooves 111 are opened to prevent the plastic from deformation.

[0034] In the same row of terminals, the differential signal terminal 2 has a shorter length than the ground terminal 3, such as Figure 4 As shown, the distance between the front end of the differential signal terminal 2 and the front end surface of the tongue plate 12 is greater than the distance between the front end of the ground terminal 3 and the front end surface of the tongue plate 12. By shortening the length of the front end of the differential signal terminal 2, the influence of the woodpile effect is reduced to improve the resonance, and the differential signal terminal 2 has a shorter transmission length as a whole, thereby reducing the facing area between different differential signal pairs and reducing the crosstalk interference between different differential signal pairs. The distance between the front end of the differential signal terminal 2 and the front end surface of the base 11 is between 3.0-3.25 mm, which refers to the visible length of the differential signal terminal 2 on the tongue plate 12. In the present embodiment, the distance between the front end of the differential signal terminal 2 and the front end surface of the base 11 is 3.25 mm. Both side edges of the tongue plate 12 are provided with a bevel 121, which is connected between the front end surface of the tongue plate 12 and the side surface of the tongue plate 12. The bevel 121 is used to guide an insertion angle of the plastic housing of the docking connector 200, and the front end of the differential signal terminal 2 is further backward than the bevel 121, and the front end of the grounding terminal 3 is overlapped with the bevel 121 along the width direction of the tongue plate 12, so that when guiding the insertion of the docking connector 200, the ground terminal corresponding to the docking connector 200 can first scrape and contact with the front end of the grounding terminal 3, and after the guiding is completed, the signal terminal corresponding to the docking connector 200 can contact with the front end of the differential signal terminal 2.

[0035] like Figure 3 As shown, the head 27 of the differential signal terminal 2 is straight and has a smaller thickness than other parts of the differential signal terminal 2. The thickness of the differential signal terminal 2 excluding the head is 0.12-0.14 mm. In this embodiment, the thickness of the differential signal terminal 2 excluding the head is 0.12 mm, and the thickness of the head is less than 0.12 mm. Since the differential signal terminal 2 as a whole has a smaller thickness than the common plate thickness of the terminal (0.15 mm), the distance between the upper row of differential signal terminals 2 and the lower row of differential signal terminals 2 is increased, which is beneficial to reduce the crosstalk interference between the upper row of differential signal pairs and the lower row of differential signal pairs, and the corresponding cross-sectional area of ​​the current passing through the fixed portion 23 is also reduced, which also improves the impedance at the fixed portion 23.

[0036] like Figure 7 and Figure 8 As shown, the intermediate shielding sheet 4 is horizontally embedded in the tongue plate 12 and the base 11, and the distances from the contact portion 21, the connection portion 22 and the fixing portion 23 of each differential signal terminal 2 in the differential signal pair to the intermediate shielding sheet 4 are equal to maintain the synchronization of the signal transmitted by the differential signal terminal 2, and the intermediate shielding sheet 4 is blocked between the upper row of differential signal pairs and the lower row of differential signal pairs to reduce the crosstalk interference between the upper and lower rows of differential signal pairs. The intermediate shielding sheet 4 has two abutting portions 41 respectively exposed on both sides of the base 11, and abutting against the inner wall surface of the metal shell 5 to achieve electrical connection.

[0037] like Figure 2 and Figure 7 As shown, the side walls of the metal shell 5 are arranged to form a plug-in cavity 51, and the tongue plate 12 is located in the plug-in cavity 51. The front end of the side wall of the metal shell 5 has a guide surface 52 inclined inwardly, and the guide surface 52 is arranged more forward than the inclined surface 121 of the tongue plate 12, so that when docking, it is guided by the guide surface 52 and the inclined surface 121 in sequence and docked smoothly. Two foolproof columns 13 protrude forward from the base 11, and the two foolproof columns 13 are respectively located on the two outer sides of the metal shell 5. The two foolproof columns 13 match the shapes of the concave on both sides of the metal shell 5 to identify whether the insulating body 1 and the metal shell 5 are correctly assembled. The metal shell 5 has an assembled back cover 53 shielded behind the insulating body 1 to shield the noise signal from the rear side.

[0038] like Fig. 9 and Fig.10 1 is a second embodiment of the present invention. The second embodiment is the same as the differential signal terminal 2 of the first embodiment, but the local structures of the insulating body 1, the intermediate shielding sheet 4, and the metal shell 5 are different. In the second embodiment, the plastic on the front end surface of the tongue plate 12 extends continuously to the front end of the differential signal terminal 2 to form a continuous plastic filling area Q. The plastic filling area Q is a solid structure and does not have openings or grooves, which is conducive to maintaining good structural strength at the front end of the tongue plate 12 and is conducive to smooth docking of the docking connector 200. The metal shell 5 is provided with an integral connection. The back cover 53 connected to the insulating body 1 is shielded at the rear of the insulating body 1 to shield the noise signal from the rear side; two card slots 113 are recessed on both sides of the base 11, and the card slots 113 are not connected to the multiple grooves 111. The two abutting portions 41 of the intermediate shielding sheet 4 are respectively exposed in the two card slots 113. The metal shell 5 is recessed with two windows 54, and a buckle 55 extends from the edge of the window 54. The two buckles 55 are respectively snapped into the two card slots 113. The surfaces of the two abutting portions 41 are in contact with the inner surface of the metal shell 5 and are connected by laser spot welding. When viewed from above, as shown in FIG. Fig.10As shown, the abutting portion 41 can be correspondingly exposed in the window 54 , so that it is convenient to directly observe whether the abutting portion 41 is well connected to the metal shell 5 .

[0039] In summary, the electrical connector 100 of the present invention has the following beneficial effects:

[0040] 1. The width of the connecting portion 22 and the fixing portion 23 is smaller than the width of the contact portion 21 thereof, thereby reducing the cross-sectional area of ​​the current passing through the connecting portion 22 and the fixing portion 23, and improving the impedance of the connecting portion 22 and the fixing portion 23. The fixing portion 23 is embedded in the base 11 and partially exposed in the groove 111. The fixing portion 23 is exposed in the air, which reduces the dielectric constant and improves the impedance at the fixing portion 23. The distance D2 between the two connecting portions 22 of the two adjacent differential signal terminals 2 is smaller than the distance D1 between the two contact portions 21 thereof, so that the two connecting portions 22 are relatively close to the two contact portions 21 thereof. The contact portion 21 forms a tight coupling, thereby increasing the impedance at the connecting portion 22. The distance D3 between the two fixing portions 23 is smaller than the distance D2 between the two connecting portions 22, so that the two fixing portions 23 are further tightly coupled, thereby further increasing the impedance at the fixing portion 23, so that the impedance between the contact portion 21, the connecting portion 22, and the fixing portion 23 of the differential signal terminal 2 is balanced, thereby achieving overall impedance matching of the differential signal terminal 2, and reducing the mutual inductance between the differential signal terminal 2 and other signals (other differential signals or single-ended signals), thereby reducing crosstalk interference between different signals, so that the signal can be transmitted stably.

[0041] 2. The distance between two adjacent soldering portions 26 in the differential signal terminal 2 is greater than the distance between two adjacent second offset portions 25 and greater than the distance between two adjacent first offset portions 24, so that the distance between two adjacent differential signal terminals 2 is gradually widened from a small spacing at the fixed portion 23 to a large spacing at the soldering portion 26 through two outward offsets of the first offset portion 24 and the second offset portion 25 to match the circuit board 6, that is, the spacing between the two differential signal terminals 2 is gradually adjusted by two width changes, avoiding impedance mutations caused by excessive outward offsets of the terminals at one time, and the distance between two adjacent first offset portions 24 is equal to the distance between two adjacent fixed portions 23, maintaining the two differential signal terminals 2 at the first offset portion 24. Maintaining continuous tight coupling to reduce crosstalk interference between different differential signal pairs.

[0042] 3. The distance between the front end portion of the differential signal terminal 2 and the front end surface of the tongue plate 12 is greater than the distance between the front end portion of the grounding terminal 3 and the front end surface of the tongue plate 12, thereby shortening the length of the front end portion of the differential signal terminal 2 in front of the contact portion 21, reducing the influence of the woodpile effect, and the differential signal terminal 2 as a whole has a shorter transmission length, thereby reducing the facing area between different differential signal pairs and reducing the crosstalk interference between different differential signal pairs, and the front end portion of the differential signal terminal 2 is further back than the inclined surface 121, and the front end portion of the grounding terminal 3 overlaps with the inclined surface 121 along the width direction of the tongue plate 12, so that when the guiding docking connector 200 is inserted, the corresponding grounding terminal in the docking connector 200 can first scrape and contact with the front end portion of the grounding terminal 3, and after the guiding is completed, the corresponding signal terminal in the docking connector 200 can contact with the front end portion of the differential signal terminal 2.

[0043] 4. The two fool-proofing posts 13 are respectively located on the two outer sides of the metal shell 5. The two fool-proofing posts 13 match the shapes of the depressions on both sides of the metal shell 5 to correctly assemble the insulating body 1 and the metal shell 5. The guide surface 52 of the metal shell 5 is arranged further forward than the inclined surface 121 of the tongue plate 12, so that the docking connector can be smoothly docked after being guided in sequence by the guide surface 52 and the inclined surface 121, ensuring that the differential signal terminal 2 can accurately make electrical contact with the corresponding signal terminal in the docking connector 200.

[0044] The above detailed description is only an explanation of the preferred embodiment of the utility model, and does not limit the patent scope of the utility model. 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, characterized in that: include: An insulating body, the insulating body comprising a base and a tongue protruding from the base, and a plurality of grooves are recessed from the base at intervals; At least two differential signal terminals and at least one ground terminal are fixed to the insulating body, the differential signal terminal includes a contact portion, the contact portion is exposed on the surface of the tongue plate, a connecting portion extends from the contact portion toward the base and a fixing portion extends from the connecting portion, the connecting portion is exposed on the tongue plate and extends into the base, the fixing portion is embedded in the base and partially exposed in the groove, the widths of the connecting portion and the fixing portion are both smaller than the width of the contact portion, the distance between the two connecting portions of two adjacent differential signal terminals is smaller than the distance between the two contact portions, and the distance between the two fixing portions is smaller than the distance between the two connecting portions.

2. The electrical connector according to claim 1, wherein: A first offset portion and a second offset portion extend in sequence from the fixed portion, a welding portion extends from the second offset portion, the widths of the first offset portion and the second offset portion are greater than the width of the fixed portion, the welding portion extends out of the base, the distance between two adjacent welding portions is greater than the distance between two adjacent second offset portions and greater than the distance between two adjacent first offset portions, and the distance between two adjacent first offset portions is equal to the distance between two adjacent fixed portions.

3. The electrical connector according to claim 1, wherein: The distance between the front end portion of the differential signal terminal and the front end surface of the tongue plate is greater than the distance between the front end portion of the ground terminal and the front end surface of the tongue plate. A slope is provided on the side edge of the tongue plate, and the slope connects the front end surface of the tongue plate and the side surface of the tongue plate. The front end portion of the differential signal terminal is further back than the slope, and the front end portion of the ground terminal overlaps with the slope along the width direction of the tongue plate.

4. The electrical connector according to claim 3, characterized in that: The plastic on the front end surface of the tongue plate extends continuously to the front end portion of the differential signal terminal to form a continuous plastic filling area.

5. The electrical connector according to claim 3, characterized in that: A metal shell is wrapped around the insulating body, and each side wall of the metal shell encloses a plug-in cavity. The tongue plate is located in the plug-in cavity. The front end of the side wall of the metal shell has a guide surface inclined inward, and two anti-fool columns protrude from the base. The two anti-fool columns are respectively located on the two outer sides of the metal shell, and the guide surface is closer to the front than the inclined surface.

6. The electrical connector according to claim 1, characterized in that: The distance between the front end of the differential signal terminal and the front surface of the base is 3.0-3.25 mm.

7. The electrical connector according to claim 1, characterized in that: The differential signal terminals and the grounding terminals are each provided in plurality to form two rows of terminals arranged on opposite sides of the tongue plate. The grounding terminal includes a docking portion and a widened portion extending from the docking portion. The docking portion is exposed on the surface of the tongue plate, and the widened portion is partially exposed on the tongue plate and extends into the base. The width of the docking portion is greater than the width of the contact portion. The widened portion in one row of terminals shields two adjacent connecting portions and two adjacent fixing portions in another row of terminals.

8. The electrical connector according to claim 7, characterized in that: The head of the differential signal terminal is straight and has a smaller thickness than other parts of the differential signal terminal. The thickness of the differential signal terminal excluding the head is 0.12-0.14 mm.

9. The electrical connector according to claim 7, characterized in that: An intermediate shielding sheet is embedded in the insulating body and located between two rows of terminals. The distance between the two contact portions of two adjacent differential signal terminals and the intermediate shielding sheet is equal to the distance between the two fixed portions thereof and the intermediate shielding sheet. The widened portion has a widest point, and a plurality of the widest points are welded to the intermediate shielding sheet.

10. The electrical connector according to claim 9, characterized in that: A plurality of grooves are recessed from the top surface of the base, two card slots are recessed from both sides of the base, the card slots are not connected to the plurality of grooves, the intermediate shielding sheet has two abutment portions respectively exposed in the two card slots, the outer side of the insulating body is covered with a metal shell, the metal shell is recessed with two windows, two buckles extend from the side edges of the two windows and are respectively engaged with the two card slots, the two abutment portions are respectively exposed in the two windows, and the two abutment portions abut against the inner side of the metal shell and are electrically connected.

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