CN104466545B - Electric connector - Google Patents

Abstract

An electrical connector includes an insulating body, a metal shell covering the insulating body, and conductive terminals and metal sheets accommodated in the insulating body. The conductive terminals include several first terminals. The first terminal includes a ground terminal located in the middle and differential signal terminals located on both sides of the ground terminal. The metal sheet is located between the metal shell and the conductive terminal, and the metal sheet is provided with a first elastic arm and a second elastic arm. The first elastic arm is in elastic contact with the metal shell, and the second elastic arm is in elastic contact with the ground terminal. Such setting can improve the anti-EMI effect of the electrical connector and reduce signal crosstalk between differential signal terminals.

Description

electrical connector

【Technical field】

The invention relates to an electrical connector, in particular to an electrical connector with improved anti-EMI effect.

【Background technique】

At the end of 2008, the USB Association released the 3.0 version of the USB standard. This type of USB 3.0 connector is based on the original USB 2.0 connector. Two pairs of differential signal terminals and one ground terminal are added to improve the original. The transfer rate of the USB connector. The transmission rate of this USB 3.0 connector can reach 5G per second, and it can be plugged into USB2.0 and USB 3.0 docking connectors at the same time. However, the transmission speed of the USB3.0 connector still cannot meet the transmission requirements of electronic devices such as Blu-ray DVDs. Therefore, it is necessary to increase the transmission speed of the new generation of USB. However, when the speed is increased, the signal crosstalk between the differential signal terminals will often be strengthened, and the anti-EMI effect of the connector will be greatly reduced. When increasing the transmission speed, it is necessary to consider the anti-EMI. Effect.

For the prior art related to the present invention, please refer to an electrical connector disclosed in Chinese Invention Patent No. CN202797485U announced on March 13, 2013. The electrical connector includes an insulating body, a metal shell covering the insulating body, and a housing The conductive terminal in the insulating body, the metal shell surrounds the insulating body to form a receiving cavity, the top wall of the metal shell is provided with a supporting piece extending into the receiving cavity, and the supporting piece is overlapped with the grounding terminal, so Setting, the anti-EMI effect of the electrical connector and the effect of solving the crosstalk between the differential signal terminals are not very obvious.

Therefore, it is necessary to improve the existing electrical connectors to overcome the above-mentioned defects in the prior art.

【Content of invention】

The object of the present invention is to provide an electrical connector with improved anti-EMI effect.

The purpose of the present invention is achieved through the following technical solutions: an electrical connector, which includes an insulating body, a metal shell covering the insulating body, and conductive terminals housed in the insulating body, the conductive terminals include a plurality of first terminals and A plurality of second terminals, the plurality of first terminals include a ground terminal located in the middle and two pairs of differential signal terminals located on both sides of the ground terminal, the metal housing includes a rear wall, wherein the electrical connector is provided with a A metal sheet between the rear wall and the ground terminal, the metal sheet is electrically connected to the ground terminal and the rear shell respectively.

In a preferred embodiment, the metal sheet includes a vertical plate-shaped main body, a first elastic arm is provided at the upper end of the main body, a second elastic arm is provided at the lower end of the main body, and the first elastic arm The second elastic arm elastically abuts against the metal shell backward, and the second elastic arm elastically abuts against the ground terminal forwardly.

In a preferred embodiment, the first elastic arm extends obliquely upward from the upper end of the main body, the second elastic arm extends obliquely upward from the lower end of the main body, and the first elastic arm and the second elastic arm are located where the metal sheet is located. Different sides of a vertical plane.

In a preferred embodiment, the first terminal includes a first holding portion accommodated in the insulating body, a first connecting portion bent and extended downward from the end of the first holding portion, and a first connecting portion extending downward from the first connecting portion. The first welding part of the second elastic arm is against the first connecting part of the ground terminal.

In a preferred embodiment, the insulating body further includes a positioning seat, the positioning seat includes a main body, and the positioning seat is provided with a plurality of first receiving grooves penetrating through the main body up and down, for accommodating the first terminal. In the first connection part, the width of the first receiving groove in the middle along the front-rear direction is wider than that of the first receiving grooves on both sides thereof, so as to accommodate the main body of the metal sheet.

In a preferred embodiment, the first receiving groove located in the middle is provided with an opening that passes through the main body of the positioning seat backwards, and the first elastic arm extends backwards through the opening and elastically abuts against the metal shell .

In a preferred embodiment, the metal sheet is assembled to the insulating body from top to bottom.

In a preferred embodiment, the rear wall is provided with a rear mounting portion extending downward.

In a preferred embodiment, the first connecting portion of the ground terminal is wider than the first connecting portion of the differential signal terminal, and the first connecting portion of the differential signal terminal on both sides of the ground terminal is wider than the first welding portion of the differential signal terminal. offset to the side away from the ground terminal.

In a preferred embodiment, the electrical connector is a USB 3.0 connector, the first terminal has a flat contact portion, and the second terminal has an arc-shaped elastic contact portion.

Compared with the prior art, the present invention has the following beneficial effects: the added metal sheet overlaps with the metal shell and the grounding terminal respectively, thereby enhancing the anti-EMI effect of the electrical connector and reducing crosstalk between differential signal terminals.

【Description of drawings】

Fig. 1 is a perspective view of the electrical connector of the present invention.

Fig. 2 is an exploded view of the electrical connector of the present invention.

Fig. 3 is a cross-sectional view of the electrical connector of the present invention along line A-A in Fig. 1 .

Fig. 4 is an exploded perspective view of the electrical connector of the present invention.

Fig. 5 is a three-dimensional exploded view of the electrical connector of the present invention from another angle.

Fig. 6 is a three-dimensional exploded view of the electrical connector of the present invention from another angle.

【detailed description】

Referring to FIGS. 1 to 3 , the electrical connector 100 of the present invention includes an insulating body 1 , a metal shell 2 covering the insulating body 1 , conductive terminals 3 and metal sheets 4 accommodated in the insulating body 1 .

Referring to FIGS. 4 to 6 , the insulating body 1 includes a base 11 , a tongue 12 extending forward from the base 11 , and a positioning seat 13 assembled to the rear of the base 11 from bottom to top. The base 11 includes a top 111 , a bottom 112 opposite to the top 111 , two side portions 113 connecting the top 111 and the bottom 112 , and a receiving space 114 located behind the base 11 . The base 11 also has a protrusion 1121 protruding downward from the bottom 112 thereof. The two side portions 113 define outwardly protruding ribs 1131 . The tongue plate 12 includes an upper surface 121 and a lower surface 122 opposite to the upper surface 121 , the lower surface 122 is provided with a plurality of holding grooves 1221 arranged side by side at the front end and a plurality of receiving grooves 1222 behind the holding grooves 1221 .

The positioning base 13 includes a main body 131 and a support plate 132 horizontally extending forward from the bottom of the main body 131 . The main body 131 includes a front surface 1311 , two side surfaces 1312 , a top surface 1313 , a bottom surface 1314 , and a rear surface 1315 . The top surface 1313 of the main body part 131 is provided with a first receiving groove 13131 that penetrates the main body part 131 up and down, and the first receiving groove 13131 in the middle is wider than the first receiving groove 13131 on both sides along the front-rear direction. width. The main body part 131 is provided with a relief part 13132 extending backward through the rear end surface 1315 from the rear end of the first receiving groove 13131 located in the middle, and the front end surface 1311 of the main body part 131 is provided with several holding blocks protruding forward 13111 , the holding block 13111 extends downward from the top surface 1313 of the main body 131 to the upper end of the support plate 132 . The support plate 132 is provided with a through hole 1321 penetrating up and down to cooperate with the protrusion 1121 on the base 11 to securely assemble the positioning seat 13 to the base 11 . The support plate 132 is also provided with a plurality of second receiving grooves 1322 , the second receiving grooves 1322 are located behind the through hole 1321 and directly in front of the holding block 13111 , and are arranged in a row correspondingly.

Referring to FIG. 1 to FIG. 4 , the metal shell 2 is integrally stamped and bent from a metal material, and the metal shell 2 is surrounded by a tongue plate 12 to form a receiving cavity 10 . The metal casing 2 includes a top wall 21 , a bottom wall 22 opposite to the top wall 21 , two side walls 23 connecting the top wall 21 and the bottom wall 22 , and a rear wall 24 . The rear wall 24 is formed by extending the rear edges of the two side walls 23 and bending toward each other horizontally. The top wall 21 and the bottom wall 22 of the metal housing 2 are respectively provided with a plurality of first elastic arms 211 and second elastic arms 221 extending into the receiving chamber 10 . Each of the sidewalls 23 is provided with a third elastic arm 231 extending into the receiving chamber 10 . The top wall 21 is additionally provided with a resisting piece 212 extending into the receiving cavity, and the resisting piece 212 is located between the two first elastic arms 211 to strengthen the resistance to the mating connector (not shown). force. The rear side of the two side walls 23 is provided with a front mounting portion 232 extending downward, and the rear wall 24 is provided with a rear mounting portion 241 extending downward, and the front mounting portion 232 cooperates with the rear mounting portion 241 to The electrical connector 100 is firmly fixed on a circuit board (not shown). The two sidewalls 23 are provided with strip-shaped retaining grooves 233 close to the rear wall 24 , and the retaining grooves 233 are used to engage with the ribs 1131 on the base 11 to enhance the fixing effect between the insulating body 1 and the metal shell 2 .

Referring to Figures 2 to 4, and in combination with Figure 6, the conductive terminal 3 includes a number of first terminals 31 and a number of second terminals 32 spaced from the first terminals 31, the first terminals 31 are Embedded in the insulating body 1, the first terminal 31 includes a first holding portion (not shown) accommodated in the tongue plate 12 and a first contact portion 312 extending forward from the first holding portion. The first contact portion 312 is substantially flat and exposed in the holding groove 1221 . The first terminal 31 further includes a first connecting portion 313 bent downward from the end of the first holding portion (not shown) and extending downward, and a first welding portion 314 extending downward from the first connecting portion 313 . The first connecting portion 313 is received in the first receiving groove 13131 , and the first welding portion 314 extends downward beyond the positioning seat 13 . The second terminal 32 is assembled into the insulating body 1 from back to front, and includes a second holding portion 321 received in the receiving groove 1222 and a second contact portion 322 extending forward from the second holding portion 321 , the second connecting portion 323 bent downward from the end of the second holding portion 321 and the second welding portion 324 extending downward from the second connecting portion 323 . The holding block 13111 of the positioning seat 13 pushes the second connecting portion 323 into the receiving space 114 of the base 11 , and the second welding portion 324 extends downwards beyond the positioning seat 13 through the second receiving groove 1322 bottom surface. There are five first terminals 31, including a ground terminal 33 in the middle and two pairs of differential signal terminals 34 respectively located on both sides of the ground terminal 33. The first connecting portion 313 of the ground terminal 33 is wider than the ground terminal 33. The width of the first connection portion 313 of the differential signal terminal 34, the first connection portion 313 close to the ground terminal 33 in each pair of the differential signal terminals 34 is offset in a direction away from the ground terminal 33 relative to the corresponding first welding portion 314 , increase the distance between the differential signal terminal 34 and the ground terminal 33 to reduce the signal crosstalk between the conductive terminals 2 .

Referring to FIGS. 2 to 5, the metal sheet 4 is roughly in the shape of a vertical flat plate and is located between the ground terminal 33 and the metal shell 2. The metal sheet 4 includes a vertical flat body portion 41, the The body part 41 includes a first elastic arm 411 at the upper end and a second elastic arm 412 at the lower end. Extending obliquely upward, the first elastic arm 411 and the second elastic arm 412 are respectively located at the rear side and the front side of the vertical plane where the metal sheet 4 is located. The body part 41 is assembled from top to bottom to the first receiving groove 13131 of the first connecting part 313 in the middle of the positioning seat 13 and accommodates the grounding terminal 33. The rear wall 24 of the metal casing 2 elastically abuts against each other. The second elastic arm 412 elastically abuts against the first connecting portion 313 of the ground terminal 33 forward.

The metal sheet 4 of the electrical connector 100 of the present invention is at least provided with a first elastic arm 411 overlapping with the metal shell 2 and a second elastic arm 421 overlapping with the first connecting portion 313 of the grounding terminal 33, thus increasing the connection with the grounding. The ground path of the terminal 33 further improves the anti-EMI effect of the electrical connector 100 and reduces the signal crosstalk between the differential signal terminals. And the metal sheet 4 has a simple structure and is easy to manufacture.

The above content is a further detailed description of the invention in this case in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. Those of ordinary skill in the technical field to which the present invention pertains can make some simple deduction or replacement without departing from the concept of the present invention, which should all be within the protection scope of the present invention.

Claims (8)

1. An electrical connector, which includes an insulating body, a metal shell covering the insulating body, and conductive terminals accommodated in the insulating body, the conductive terminals include a plurality of first terminals and a plurality of second terminals, and the plurality of first terminals The terminals include a grounding terminal located in the middle and two pairs of differential signal terminals located on both sides of the grounding terminal. The metal housing includes a rear wall and a mounting portion for fixing the electrical connector to a circuit board. It is characterized in that: The electrical connector is provided with a metal sheet located behind the ground terminal and in front of the rear wall of the metal casing, the metal sheet is electrically connected to the ground terminal and the rear wall respectively, the The metal sheet includes a vertical plate-shaped main body, a first elastic arm is provided at the upper end of the main body, and a second elastic arm is provided at the lower end of the main body, and the first elastic arm elastically abuts against the metal shell backwards, The second elastic arm elastically abuts against the ground terminal forward, the first elastic arm extends obliquely upward from the upper end of the main body, the second elastic arm extends obliquely upward from the lower end of the main body, and the first elastic arm is in contact with the ground terminal. The second elastic arms are located on different sides of the vertical plane where the metal sheet is located. 2. The electrical connector according to claim 1, wherein the first terminal comprises a first holding portion accommodated in the insulating housing, and a first connecting portion bent downward from the end of the first holding portion and a first welding portion extending downward from the first connecting portion, the second elastic arm abuts against the first connecting portion of the ground terminal. 3. The electrical connector according to claim 2, wherein the insulating body further includes a positioning seat, the positioning seat includes a main body, and the positioning seat is provided with a plurality of first receiving grooves penetrating the main body up and down , for accommodating the first connecting portion of the first terminal, wherein the width of the first accommodating groove in the middle along the front-rear direction is wider than that of the first accommodating grooves on both sides thereof, so as to accommodate the main body of the metal sheet. 4. The electrical connector according to claim 3, wherein the first receiving groove located in the middle is provided with an opening that passes through the main body of the positioning seat backwards, and the first elastic arm extends backwards through elastically abut against the metal shell through the opening. 5. The electrical connector as claimed in claim 1, wherein the metal sheet is assembled to the insulating body from top to bottom. 6. The electrical connector as claimed in claim 2, wherein the rear wall is provided with a rear mounting portion extending downward. 7. The electrical connector according to claim 3, wherein the first connection portion of the ground terminal is wider than the first connection portion of the differential signal terminal, and the first connection portion of the differential signal terminal located on both sides of the ground terminal is wider than the first connection portion of the differential signal terminal. A connecting portion deviates to a side away from the ground terminal relative to the first welding portion thereof. 8. The electrical connector according to claim 1, wherein the electrical connector is a USB 3.0 connector, the first terminal has a flat contact portion, and the second terminal has an arc-shaped elastic contact portion.