CN201812964U - electrical connector - Google Patents

Abstract

The utility model discloses an electrical connector which comprises an insulator body, a shielding casing and a plurality of terminals; the insulator body is provided with a base part and a projecting tongue part positioned on the front side of the base part; the shielding casing covers the insulator body; the terminals are remained in the insulator body; and an exposed opening is formed on the rear side of the base part, and part of the terminals are exposed in the opening and in contact with air. Compared with the prior art, the electrical connector has the advantages that in each embodiment of the utility model, since a greater part of the rear side wall of the base part of the insulator body is removed, the terminals are exposed in air to the utmost extent, the effective dielectric constant of materials around the terminals is reduced, the transmission delay of the high-speed signal to pass through the high-speed differential signal terminal is further reduced, and the capacitive crosstalk between the high-speed differential signal terminals is reduced.

Description

electrical connector

technical field

The utility model relates to an electric connector, in particular to an electric connector capable of transmitting high-speed signals.

Background technique

Universal Serial Bus (USB) is a universal serial bus standard protocol. The standard association has now begun to upgrade the standard from the now popular USB2.0 to USB3.0, and the speed has been increased from the original theoretical upper limit of 480Mbit/s. 10 times to 5Gbit/s. This poses a great challenge to the design of the USB connector interface. At the same time, the association also promulgated the design specifications of the USB3.0 connector and the strict electrical performance required to transmit high-speed signals.

1A shows two rows of terminals of a conventional high-speed USB connector, wherein one row of terminals 210 are low-speed loop terminals for transmitting low-speed signals; the other row of terminals are high-speed loop terminals 220 for transmitting high-speed signals. A row of low-speed loop terminals 210 is located directly below a row of high-speed loop terminals 220 .

FIG. 1B shows an exploded schematic view of the two rows of terminals shown in FIG. 1A . As shown in FIG. 1B , a row of low-speed loop terminals 210 includes a pair of low-speed differential signal terminals S0, S0', a power supply terminal Vbus and a ground terminal G1. A row of high-speed loop terminals 220 includes two pairs of high-speed differential signal terminals S1, S1', S2, S2' and a ground terminal G2.

As shown in Figure 1A and Figure 1B, the width of the ground terminal G2 in a row of high-speed loop terminals 220 is equal to the width of any high-speed differential signal terminal S1, S1', S2, S2', therefore, the parasitic generated on the entire high-speed loop The mutual inductance is large, which will lead to inductive coupling between the two pairs of high-speed differential signal terminals S1 , S1 ′, S2 , S2 ′, thus making it easy to generate crosstalk between the two pairs of high-speed differential signal terminals.

1A and FIG. 1B, the connection portion 221 of each terminal in a row of high-speed loop terminals 220 extends straight on its entire length, and the connection portion 211 of each terminal in a row of low-speed loop terminals 210 It also extends straight over its entire length. Therefore, as shown in FIG. 1A and FIG. 1B , the connection portion 221 of the high-speed return terminal 220 and the connection portion 211 of the low-speed return terminal 210 are spaced apart from each other in parallel and constant.

As shown in FIG. 1A, in the prior art, the distance between the high-speed loop terminal 220 and the low-speed loop terminal 210 is relatively small, which will cause the high-speed differential signal terminals S1, S1', S2, S2' to be separated from the low-speed differential signal terminal S0 , S0', so that crosstalk is likely to occur between the high-speed differential signal terminal and the low-speed differential signal terminal.

FIG. 3 shows a shielding shell 30 of a conventional high-speed USB connector. It can be seen from FIG. 3 that there is no additional grounding terminal on the shielding shell 30 of the existing USB connector, therefore, the parasitic mutual inductance Lm generated on the entire high-speed circuit is relatively large, which will cause two pairs of high-speed differential signal terminals S1, S1' , S2, and S2' are inductively coupled, so that crosstalk is likely to occur between two pairs of high-speed differential signal terminals.

FIG. 2A shows a plastic body of a conventional high-speed USB connector. FIG. 2B shows an exploded view of the plastic body shown in FIG. 2A . As shown in FIGS. 2A and 2B , the plastic body of this conventional USB connector is formed by a base 10 and a separate fixed side wall 60 . The two rows of terminals are wrapped in the plastic body of the base 10 and the fixed side wall 60 except for the exposed elastic contact part and the tail end. Since the two rows of terminals are surrounded by insulating plastic, each high-speed differential signal terminal The large dielectric constant causes signal transmission delays when each high-speed differential signal terminal transmits signals.

In view of the existing high-speed USB connectors that are prone to crosstalk between high-speed differential signal terminals and between high-speed differential signal terminals and low-speed differential signal terminals, and high-speed differential signal terminals are prone to transmission delays and other technical problems, it is indeed necessary to propose a A new high-speed USB connector can at least effectively alleviate the aforementioned technical problems or completely eliminate the aforementioned technical problems.

Utility model content

The purpose of this utility model is to solve at least one aspect of the above-mentioned problems and defects existing in the prior art.

Correspondingly, one of the objectives of the present invention is to provide an electrical connector capable of effectively reducing mutual crosstalk between high-speed differential signal terminals.

Another object of the present invention is to provide an electrical connector capable of effectively reducing crosstalk between low-speed differential signal terminals and high-speed differential signal terminals.

Another object of the present invention is to provide an electrical connector capable of effectively reducing the transmission delay when a high-speed signal passes through a high-speed differential signal terminal.

According to one aspect of the present utility model, it provides an electrical connector, comprising: an insulating body having a base and a tongue portion on the front side of the base; a shielding shell wrapping the insulating body; and holding A plurality of terminals in the insulating body. Wherein, an exposed opening is formed on the rear side of the base, and a part of the plurality of terminals is exposed in the opening to be in contact with air.

According to a preferred embodiment of the present invention, the lower part of the rear opening of the base has a fixed wall, and the fixed wall has a plurality of insertion holes for positioning the plurality of terminals.

According to another preferred embodiment of the present invention, the height of the fixed wall is smaller than the height of the opening.

According to another preferred embodiment of the present invention, the height of the fixed wall is less than half of the height of the opening.

According to another preferred embodiment of the present utility model, the fixed wall is integrally formed with the insulating main body.

According to another preferred embodiment of the present utility model, the fixed wall is an independent component installed in the rear opening of the base.

According to another preferred embodiment of the present invention, the multiple terminals include a row of low-speed loop terminals and a row of high-speed loop terminals, and the row of high-speed loop terminals includes two pairs of high-speed differential signal terminals and a ground terminal; and the A width of at least a portion of the ground terminal is greater than a width of a corresponding portion of any one of the two pairs of high-speed differential signal terminals.

According to another preferred embodiment of the present utility model, the ground terminal includes a contact portion, a plug portion, and a connection portion between the contact portion and the plug portion; the two pairs of high-speed differential signal terminals Any one of them includes a contact portion, a plug portion, and a connection portion between the contact portion and the plug portion; and the connection portion of the ground terminal has a width greater than that of any one of the high-speed differential signal terminals. width.

According to another preferred embodiment of the present invention, a part of the connecting portion of the high-speed differential signal terminal is bent in a direction away from the low-speed loop terminal, thereby forming a bent section.

According to another preferred embodiment of the present invention, a part of the connecting portion of the ground terminal is bent in a direction away from the low-speed circuit terminal, thereby forming a bent section.

According to another preferred embodiment of the present utility model, each bending segment of the row of high-speed circuit terminals extends horizontally.

According to another preferred embodiment of the present invention, each bent section of the row of high-speed circuit terminals includes a part embedded in the insulating body and a part exposed from the insulating body.

According to another preferred embodiment of the present invention, the row of low-speed loop terminals includes a pair of low-speed differential signal terminals, any one of the pair of low-speed differential signal terminals includes a contact portion, a plug-in portion, and a a connection portion between the contact portion and the plug-in portion; and a part of the connection portion of the low-speed differential signal terminal is bent in a direction away from the high-speed loop terminal, thereby forming a bent section.

According to another preferred embodiment of the present utility model, the row of low-speed circuit terminals further includes a power terminal and a ground terminal; the power terminal includes a contact part, a plug part, and a the connection part between the connection parts; the ground terminal of the row of low-speed circuit terminals includes a contact part, a plug part, and a connection part between the contact part and the plug part; and the row of low-speed A part of the connecting portion of the power terminal and the ground terminal of the return terminal is bent in a direction away from the high-speed return terminal, thereby forming a bent section.

According to another preferred embodiment of the present utility model, each bent segment of the row of low-speed circuit terminals extends obliquely.

According to another preferred embodiment of the present invention, each bent section of the row of low-speed circuit terminals includes a portion embedded in the insulating body and a portion exposed from the insulating body.

According to another preferred embodiment of the present invention, an additional grounding terminal is provided on the shielding shell.

According to another preferred embodiment of the present utility model, the electrical connector is a USB3.0 connector, wherein the row of low-speed loop terminals is used for compatibility with the standard USB2.0 protocol, and the row of high-speed loop terminals is used for The signal is transmitted according to the USB3.0 protocol.

Compared with the prior art, in the above-mentioned embodiments of the present invention, since the widened ground terminal is used, the inductive crosstalk between the high-speed differential signal terminals can be effectively reduced. At the same time, in the above-mentioned embodiments of the present utility model, since the connecting part of the high-speed differential signal terminal is bent away from the low-speed loop terminal, the distance between the low-speed differential signal terminal and the low-speed differential signal terminal is increased, so it can effectively Reduces capacitive crosstalk between high-speed differential signal terminals and low-speed differential signal terminals. Moreover, in the above-mentioned various embodiments of the present invention, since the rear sidewall of the base of the insulating body is mostly removed, the terminals are exposed to the air to the greatest extent, reducing the dielectric constant ε of the material around the terminals, thereby The transmission delay when the high-speed signal passes through the high-speed differential signal terminal is reduced, and the capacitive crosstalk between the high-speed differential signal terminals is further reduced.

Description of drawings

Figure 1A shows two rows of terminals of a conventional high-speed USB connector;

FIG. 1B shows an exploded schematic view of the two rows of terminals shown in FIG. 1A;

FIG. 2A shows a plastic body of a conventional high-speed USB connector;

FIG. 2B shows an exploded schematic view of the plastic body shown in FIG. 2A;

Figure 3 shows a shielding shell of an existing high-speed USB connector;

Fig. 4 shows an exploded schematic diagram of an electrical connector according to an exemplary embodiment of the present invention;

Fig. 5 shows an exploded schematic view of the two rows of terminals shown in Fig. 4;

Figure 6 shows an enlarged schematic view of the insulating body shown in Figure 4;

Figure 7 shows a schematic view when the two rows of terminals are held in the insulating body; and

FIG. 8 shows an enlarged schematic view of the shielding shell 1 shown in FIG. 4 .

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following descriptions of the embodiments of the utility model with reference to the accompanying drawings are intended to explain the overall utility model concept of the utility model, and should not be construed as a limitation of the utility model.

4 to 8 show an electrical connector according to an exemplary embodiment of the present invention. specifically,

FIG. 4 shows an exploded schematic diagram of an electrical connector according to an exemplary embodiment of the present invention. As shown in FIG. 4 , in this embodiment, the electrical connector mainly includes a shielding shell 1 , an insulating body 2 and two rows of terminals 31 - 35 . Two rows of terminals 31 - 35 are held in multiple cavities 24 of the insulating body 2 , and the shielding shell 1 is wrapped outside the insulating body 2 .

FIG. 5 shows an exploded schematic view of the two rows of terminals shown in FIG. 4 . As shown in Figure 5, in a preferred exemplary embodiment, one row of terminals in the two rows of terminals is used to transmit low-speed signals, which is called a row of low-speed loop terminals 31-33 here, and the other row of terminals in the two rows A row of terminals is used to transmit high-speed signals, which is referred to as a row of high-speed loop terminals 34-35 here.

As shown in FIG. 4, in a preferred embodiment, a row of high-speed return terminals 34-35 is located directly above a row of low-speed return terminals 31-33. However, it should be noted that the row of high-speed circuit terminals 34-35 may also be located directly below the row of low-speed circuit terminals 31-33. For the convenience of explanation, in this article, we only take a row of high-speed circuit terminals 34-35 located directly above a row of low-speed circuit terminals 31-33 as an example to specifically illustrate the present invention.

As shown in FIG. 4, a row of high speed return terminals 34-35 and a row of low speed return terminals 31-33 are spaced generally parallel to each other. Referring to FIG. 5 , in this embodiment, a row of high-speed loop terminals 34 - 35 includes two pairs of high-speed differential signal terminals 34 and one ground terminal 35 . As shown in FIG. 5 , two pairs of high-speed differential signal terminals 34 and one ground terminal 35 are arranged side by side in a row and have the same length.

Referring to FIG. 5 , in this embodiment, a row of low-speed loop terminals 31 - 33 includes a pair of low-speed differential signal terminals 32 , a power terminal 31 and a ground terminal 33 . As shown in FIG. 5 , a pair of low-speed differential signal terminals 32 , a power supply terminal 31 and a ground terminal 33 are arranged side by side in a row and have the same length.

Please continue to refer to FIG. 5 , in a preferred exemplary embodiment, the ground terminal 35 of the high-speed circuit includes a contact portion 351 , a plug portion 354 , and a connection portion 352 between the contact portion 351 and the plug portion 354 .

As shown in FIG. 5, in a preferred exemplary embodiment, the shapes and sizes of the two pairs of high-speed differential signal terminals 34 are identical to each other, and any one of the high-speed differential signal terminals 34 includes a portion corresponding to the ground terminal 35, namely Any one of the high-speed differential signal terminals 34 also includes a contact portion 341 , a plug portion 344 , and a connection portion 342 between the contact portion 341 and the plug portion 344 .

Similarly, please continue to refer to FIG. 5 , in a preferred exemplary embodiment, the ground terminal 33 of the low-speed circuit includes a contact portion 331 , a plug portion 334 , and a connection between the contact portion 331 and the plug portion 334 Section 332. Meanwhile, the power terminal 31 of the low-speed circuit also includes a contact portion 311 , a plug portion 314 , and a connection portion 312 between the contact portion 311 and the plug portion 314 . In this preferred exemplary embodiment, the ground terminal 33 and the power terminal 31 are identical in shape and size to each other.

Similarly, as shown in FIG. 5, a pair of low-speed differential signal terminals 32 have the same shape and size as each other, and any low-speed differential signal terminal 32 includes a contact portion 321, a plug portion 324, and a contact portion 321 and a plug portion. 324 between the connecting portion 322 .

Please continue to refer to FIG. 5 , in a preferred exemplary embodiment, the width of the connecting portion 352 of the ground terminal 35 of the high-speed circuit is designed to be greater than the width of the connecting portion 342 of any high-speed differential signal terminal 34 . The purpose of adopting this design is mainly to reduce the inductive coupling between a row of high-speed loop terminals, thereby reducing the mutual crosstalk between high-speed differential signal terminals 34, because this inductive coupling is the cause of crosstalk between high-speed differential signal terminals One of the main reasons for this inductive coupling can be calculated by the following formula (1):

Vnoise＝Lm*(dVdriver/dt) (1)

in,

Lm is the mutual inductance Lm generated parasitic on the high-speed circuit;

dVdriver/dt represents the rate of change of the signal transmission speed of the high-speed loop terminal.

It can be known from the above formula (1) that the inductive coupling Vnoise between a row of high-speed loop terminals is mainly generated by the parasitic mutual inductance Lm on the high-speed loop. Therefore, increasing the width of the ground terminal 35 can effectively reduce the parasitic mutual inductance Lm on the high-speed loop, thereby effectively reducing the mutual crosstalk between the high-speed differential signal terminals 34 .

However, it should be noted that the connection portion 352 of the ground terminal 35 may be wider than the connection portion 342 of each high-speed differential signal terminal 34 as a whole, or may be partially wider than the connection portion 342 of each high-speed differential signal terminal 34, that is, as long as If the width of at least a part of the ground terminal 35 is greater than the width of the corresponding part of any one of the two pairs of high-speed differential signal terminals 34, it is considered to fall within the protection scope of the present invention.

FIG. 8 shows an enlarged schematic view of the shielding shell 1 shown in FIG. 4 . As shown in FIG. 8, in another preferred exemplary embodiment, the lower part of the shielding shell 1 has an additional ground terminal 11 extending vertically downwards, which is to further reduce the distance between a row of high-speed loop terminals. Inductive coupling, so as to further reduce the mutual crosstalk between the high-speed differential signal terminals 34 .

As shown in FIG. 5 , in order to illustrate various exemplary embodiments of the present invention, a front-rear direction and an up-down direction are defined in FIG. 5 . As shown in FIG. 5 , the front-rear direction is roughly the extending direction of the connection portion of each terminal, and the up-down direction is roughly the extending direction of the insertion portion of each terminal.

As shown in Figures 4 and 5, in a preferred exemplary embodiment, the rear portion of the connection portion 342 of the high-speed differential signal terminal 34 is bent upwards (towards a direction away from the low-speed circuit terminal) to form a fold Bend segment 343 . The purpose of adopting this design is mainly to reduce the capacitive coupling between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32, thereby reducing the mutual crosstalk between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32, because this This capacitive coupling is a main cause of mutual crosstalk between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32, and this capacitive coupling can be calculated by the following formulas (2) and (3):

Inoise＝Cm*(dVdriver/dt) (2)

Cm＝εA/d;

in,

Cm is the capacitance between the high-speed differential signal terminal and the low-speed differential signal terminal;

ε is the dielectric constant of the material between the high-speed differential signal terminal and the low-speed differential signal terminal;

A is the facing area between the high-speed differential signal terminal and the low-speed differential signal terminal;

d is the distance between the high-speed differential signal terminal and the low-speed differential signal terminal.

From the above formulas (2) and (3), it can be seen that the capacitive coupling Inoise between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 is inversely proportional to the distance d between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 . Therefore, when the high-speed differential signal terminal 34 is bent away from the low-speed loop terminal, the distance d between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 is increased, thereby effectively reducing the high-speed differential signal. The capacitive coupling Inoise between the terminal 34 and the low-speed differential signal terminal 32 can effectively reduce the mutual crosstalk between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 .

As shown in FIGS. 4 and 5 , in another preferred exemplary embodiment, the rear portion of the connecting portion 322 of the low-speed differential signal terminal 32 is bent downward (towards a direction away from the high-speed loop terminal), The bent segment 323 is formed to further increase the distance d between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 , so that the mutual crosstalk between the high-speed differential signal terminal 34 and the low-speed differential signal terminal 32 can be more effectively reduced .

Please continue to refer to FIGS. 4 and 5. In a preferred exemplary embodiment, corresponding to the high-speed differential signal terminal 34, the rear part of the connection portion 352 of the ground terminal 35 is also directed away from the low-speed loop terminal. Bending to form a bent segment 353 .

Please continue to refer to FIG. 4 and FIG. 5, in a preferred exemplary embodiment, corresponding to the low-speed differential signal terminal 32, the rear parts of the connection parts 312, 332 of the power terminal 31 and the ground terminal 33 are also respectively downward (towards a direction away from the high-speed circuit terminal) to form bent segments 313 , 333 .

Please continue to refer to FIG. 5 , in a preferred exemplary embodiment, the width of the power terminal 31 and the ground terminal 33 of the low-speed circuit is greater than the width of the low-speed differential signal terminal 32 . Certainly, the utility model is not limited thereto, and the width of the power terminal 31 and the ground terminal 33 of the low-speed loop can also be equal to the width of the low-speed differential signal terminal 32, that is, the size and shape of the terminals 31-33 of a row of low-speed loops can also be completely unanimous.

As shown in FIG. 5, in a preferred exemplary embodiment, each bent section 343, 353 of a row of high-speed circuit terminals protrudes from the corresponding connecting portion 342, 352 and extends horizontally, forming a raised level platform. However, the present invention is not limited thereto, and the bending segments 343 and 353 of a row of high-speed circuit terminals can also extend obliquely upward from the corresponding connecting parts 342 and 352 to form an upward slope.

As shown in FIG. 5 and FIG. 7 , the front part of each bent segment 343 , 353 of a row of high-speed circuit terminals is embedded in the insulating body 2 , and the rear part is exposed from the insulating body 2 .

As shown in FIG. 5, in a preferred exemplary embodiment, each bending segment 313, 323, 333 of a row of low-speed circuit terminals extends obliquely downward from the corresponding connecting portion 312, 322, 332, forming a down the slope. However, the utility model is not limited thereto, and the bending segments 313, 323, 333 of a row of low-speed circuit terminals can also be concave and extend horizontally from the corresponding connecting parts 312, 322, 332 to form a concave horizontal platform .

As shown in FIG. 5 and FIG. 7 , the front part of each bent segment 313 , 323 , 333 of a row of low-speed circuit terminals is embedded in the insulating body 2 , and the rear part is exposed from the insulating body 2 .

Fig. 6 shows an enlarged schematic view of the insulating body shown in Fig. 4; Fig. 7 shows a schematic view when two rows of terminals are held in the insulating body. As shown in FIGS. 6 and 7 , in a preferred exemplary embodiment of the present invention, the insulating body 2 mainly includes a base 23 and a tongue portion 22 located on the front side of the base 23 .

Please continue to refer to Fig. 6 and Fig. 7, in a preferred exemplary embodiment of the present utility model, the side wall on the rear side of the base 23 is mostly removed to form an exposed opening 27, and the insertion of the two rows of terminals 31-35 Most of the contact portion is exposed in this opening 27 to contact with the air. One purpose of adopting this design is to reduce the transmission delay when high-speed signals pass through high-speed differential signal terminals, because the transmission speed of high-speed signals in high-speed differential signal terminals depends on the dielectric constant ε of the material around the terminals.

The transmission delay when a high-speed signal passes through a high-speed differential signal terminal can be calculated by the following formula (4):

Propagation Delay＝L sqrt(ε)/C (4)

in,

Propagation Delay is the transmission delay when a high-speed signal passes through a high-speed differential signal terminal;

L is the length of the high-speed differential signal terminal;

ε is the dielectric constant of the material surrounding the high-speed differential signal terminals;

C is the speed of light.

It can be seen from the above formula (4) that when the length of the high-speed differential signal terminal remains unchanged, reducing the dielectric constant ε of the material around the terminal can effectively reduce the transmission delay when the high-speed signal passes through the high-speed differential signal terminal.

In the above-mentioned preferred embodiment of the present invention, since the plastic side wall of the fixed terminal is removed to the greatest extent, the terminal is exposed to the air to the greatest extent and is surrounded by air instead of being wrapped by plastic, thus reducing the air pressure around the terminal. The dielectric constant ε of the material makes the transmission speed of the high-speed signal in the high-speed differential signal terminal approximately equal to the speed of light C.

Another purpose of adopting the above-mentioned design is to reduce the capacitive coupling between the high-speed differential signal terminals, thereby reducing the mutual crosstalk between the high-speed differential signal terminals 34, because the capacitive coupling between the high-speed differential signal terminals is the cause of the high-speed differential signal A major cause of mutual crosstalk between terminals 34.

The capacitive coupling Inoise between high-speed differential signal terminals can be calculated by the following formulas (5) and (6):

Inoise＝Cm*(dVdriver/dt) (5)

Cm＝εA /d;

in,

Cm is the capacitance between high-speed differential signal terminals;

ε is the dielectric constant of the material between the high-speed differential signal terminals;

A is the facing area between high-speed differential signal terminals;

d is the spacing between high-speed differential signal terminals.

Therefore, according to formulas (5) and (6), it can be seen that the capacitive coupling Inoise between the high-speed differential signal terminals is proportional to the dielectric constant ε of the material between the high-speed differential signal terminals. In the above-mentioned preferred embodiment of the present invention, since the plastic side wall of the fixed terminal is removed to the greatest extent, the terminal is exposed to the air to the greatest extent and is surrounded by air instead of being wrapped by plastic, thereby reducing the high-speed differential signal. The dielectric constant ε of the material between the terminals. , thereby reducing the mutual crosstalk between the high-speed differential signal terminals 34 .

As shown in Figures 6 and 7, in a preferred exemplary embodiment of the present utility model, most of the sidewalls on the rear side of the base 23 are removed, leaving only a small fixed section at the bottom of the base 23. wall 21. There are two rows of insertion holes 25, 26 in the fixed wall 21 for positioning and fixing the two rows of terminals 31-35.

In order to enlarge the opening 27, in a preferred exemplary embodiment of the present invention, the height (thickness) of the fixing wall 21 in the up-down direction is smaller than the height of the opening 27 in the up-down direction.

In order to further enlarge the opening 27, in another preferred exemplary embodiment of the present invention, the height (thickness) of the fixing wall 21 in the up-down direction is less than half of the height of the opening 27 in the up-down direction.

In a preferred exemplary embodiment of the present invention, the fixing wall 21 is integrally formed with the insulating main body 2 , for example, an integral part is formed once by overmolding.

However, the utility model is not limited thereto, the fixed wall 21 can also be an independent part, the rear side of the insulating body 2 is a completely open opening 27 without side walls, and the fixed wall 21 is installed in the opening 27 of the insulating body 2 middle.

Referring to FIG. 8 , a plurality of elastic retaining pieces 13 are provided on the outer surface of the shielding shell 1 for reliably retaining the insulating body 2 .

At the same time, please refer to FIG. 6, a protrusion 28 is provided on the fixed wall 21 of the insulating body 2, and an opening 14 matching the aforementioned protrusion 28 is provided on the rear side wall of the shielding shell 1. When the insulating body 2 is installed in the shielding When in the housing 1 , the protrusion 28 of the insulating body 2 is snapped together with the opening 14 of the shielding case 1 , so that the insulating body 2 and the shielding case 1 are snapped together.

In a preferred exemplary embodiment of the present invention, the electrical connector shown in Fig. 4-Fig. 8 is a USB3.0 connector, wherein a row of low-speed loop terminals 31-33 is used for compatible standard USB2.0 protocol, a row of high-speed loop terminals 34-35 are used to transmit high-speed signals according to the USB3.0 protocol.

Although the utility model has been described in conjunction with the drawings, the embodiments disclosed in the drawings are intended to illustrate the preferred implementation of the utility model, and should not be construed as a limitation of the utility model.

While certain embodiments of the present general inventive concept have been shown and described, those of ordinary skill in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the present invention The scope of the utility model is defined by the claims and their equivalents.

Claims (18)

1. An electrical connector, comprising: an insulating body (2) having a base (23) and a tongue portion (22) on the front side of said base (23); a shielding shell (1) wrapping the insulating body (2); and a plurality of terminals (31-35) held in said insulating body (2), It is characterized by: An exposed opening (27) is formed on the rear side of the base (23), and a part of the plurality of terminals (31-35) is exposed in the opening (27) to be in contact with air. 2. The electrical connector according to claim 1, characterized in that: The lower part of the rear opening (27) of the base (23) has a fixed wall (21), and the fixed wall (21) has a plurality of sockets (25, 26) for positioning the plurality of terminals (31 -35). 3. The electrical connector according to claim 2, characterized in that: The height of the fixed wall (21) is smaller than the height of the opening (27). 4. The electrical connector according to claim 3, characterized in that: The height of the fixed wall (21) is less than half of the height of the opening (27). 5. The electrical connector according to claim 2, characterized in that: The fixed wall (21) is integrally formed with the insulating main body (2). 6. The electrical connector according to claim 2, characterized in that: The fixed wall (21) is an independent part installed in the rear opening (27) of the base (23). 7. The electrical connector according to claim 1, characterized in that: The plurality of terminals includes a row of low-speed return terminals and a row of high-speed return terminals, the row of high-speed return terminals including two pairs of high-speed differential signal terminals (34) and a ground terminal (35); and At least a portion (352) of the ground terminal (35) has a width greater than a width of a corresponding portion (342) of any one of the two pairs of high-speed differential signal terminals (34). 8. The electrical connector according to claim 7, characterized in that: The ground terminal (35) includes a contact portion (351), an insertion portion (354), and a connection portion (352) between the contact portion (351) and the insertion portion (354); Any one of the two pairs of high-speed differential signal terminals (34) includes a contact portion (341), a plug portion (344), and a socket between the contact portion (341) and the plug portion (344). the connecting portion (342); and The width of the connecting portion (352) of the ground terminal (35) is larger than the width of the connecting portion (342) of any high-speed differential signal terminal (34). 9. The electrical connector according to claim 8, characterized in that: A part of the connecting portion (342) of the high-speed differential signal terminal (34) is bent in a direction away from the low-speed loop terminal, thereby forming a bent segment (343). 10. The electrical connector according to claim 9, characterized in that: A part of the connection portion (352) of the ground terminal (35) is bent in a direction away from the low-speed circuit terminal, thereby forming a bent section (353). 11. The electrical connector according to claim 10, characterized in that: Each bending segment (343, 353) of the row of high-speed circuit terminals (34, 35) extends horizontally. 12. The electrical connector according to claim 11, characterized in that: Each bending section (343, 353) of the row of high-speed return terminals (34, 35) includes a part embedded in the insulating body (2) and a part exposing the insulating body (2). 13. The electrical connector according to claim 7, characterized in that: The row of low-speed loop terminals includes a pair of low-speed differential signal terminals (32), and any one of the pair of low-speed differential signal terminals (32) includes a contact part (321), a plug-in part (324), and a The connection portion (322) between the contact portion (321) and the plug portion (324); and A part of the connection portion (322) of the low-speed differential signal terminal (32) is bent in a direction away from the high-speed loop terminal, thereby forming a bent segment (323). 14. The electrical connector according to claim 7, characterized in that: The row of low-speed circuit terminals also includes a power terminal (31) and a ground terminal (33); The power terminal (31) includes a contact portion (311), an insertion portion (314), and a connection portion (312) between the contact portion (311) and the insertion portion (314); The ground terminal (33) of the row of low-speed circuit terminals includes a contact portion (331), a plug portion (334), and a connection portion between the contact portion (331) and the plug portion (334) (332); and A part of the connecting portion (312, 332) of the power terminal (31) and the ground terminal (33) of the row of low-speed circuit terminals is bent in a direction away from the high-speed circuit terminal, thereby forming a bent segment (313 , 333). 15. The electrical connector according to claim 13, characterized in that: Each bending segment (313, 323, 333) of the row of low-speed circuit terminals (31, 32, 33) extends obliquely. 16. The electrical connector according to claim 15, characterized in that: Each bending segment (313, 323, 333) of the row of low-speed return terminals (31, 32, 33) includes a part embedded in the insulating body (2) and a part exposing the insulating body (2). 17. The electrical connector according to any one of claims 1-16, characterized in that: An additional grounding terminal (11) is arranged on the shielding shell (1). 18. The electrical connector according to claim 1, characterized in that: The electrical connector is a USB3.0 connector, wherein the row of low-speed loop terminals is used to be compatible with the standard USB2.0 protocol, and the row of high-speed loop terminals is used to transmit signals according to the USB3.0 protocol.

Images