CN105470713B - electrical connector - Google Patents

Abstract

The invention relates to an electric connector, which comprises an insulating body, a plurality of first terminals, a plurality of second terminals, an insulating tongue plate and a metal shell, wherein the insulating body is spaced from the insulating tongue plate, the first terminals are provided with a first contact part, an elastic part, a first fixing part and a first welding part, the first contact part is arranged on the upper surface of the insulating tongue plate, the second terminals are provided with second contact parts, the second contact parts are arranged on the lower surface of the insulating tongue plate, the metal shell is provided with a plug hole, the plug hole is divided into an upper plug hole and a lower plug hole by the insulating tongue plate, the electric connector also comprises a plurality of additional terminals fixed on the insulating body, each additional terminal comprises a contact arm, a second fixing part and a second welding part, the additional terminals are exposed in the upper plug hole and the lower plug hole, and the contact arms are positioned behind the insulating tongue plate, spaced apart.

Description

electrical connector

technical field

The invention relates to an electrical connector, in particular to an electrical connector with forward and reverse insertion functions.

Background technique

Electrical connectors are widely used in various electronic devices. In order to facilitate consumers to plug and connect, related manufacturers have developed electrical connectors with positive and negative plug-in functions, such as a USB plug connector disclosed in China Invention Announcement No. 203839547. The USB plug connector includes an insulating body, a plurality of conductive terminals, an insulating block, a circuit board and a metal shell. The fingers are electrically connected one by one, and the insulating block is formed on the circuit board to form a tongue plate together. The gold fingers are exposed on the lower surface of the tongue plate, and the conductive terminals are exposed on the upper surface of the tongue plate. When the USB plug connector is forwardly inserted into the USB socket connector, the conductive terminals contact the socket terminals in the USB socket connector to form signal transmission. When the USB plug connector is reversely inserted into the USB socket connector, the golden finger contacts the socket terminals in the USB socket connector to form signal transmission.

Since the USB plug connector only has four gold fingers and four conductive terminals, it can only transmit USB 2.0 signals, and the transmission rate is low, which is difficult to meet the needs of consumers for high-speed and large data transmission.

Therefore, it is necessary to design a new electrical connector to solve the above technical problems.

Contents of the invention

The object of the present invention is to provide an electrical connector with improved transmission rate.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an electrical connector, which includes an insulating body, a plurality of first terminals, a plurality of second terminals electrically connected to the first terminals, an insulating tongue plate and a covering The insulating body and the metal shell of the insulating tongue plate, the insulating body and the insulating tongue plate are spaced apart front and rear, the arrangement order of the first terminal and the second terminal along the left and right direction is opposite, and the first terminal has a first contact portion, The elastic part, the first fixing part and the first welding part, the first contact part is arranged on the upper surface of the insulating tongue, the elastic part connects the first contact part and the first fixing part, and the first fixing part fixed on the insulating body, the second terminal has a second contact portion, the second contact portion is arranged on the lower surface of the insulating tongue, the metal shell is provided with an insertion hole, and the insulating tongue is accommodated in the The insertion hole, the insulating tongue plate divides the insertion hole into an upper insertion hole and a lower insertion hole, and the insulating tongue plate can swing up and down depending on the elasticity of the elastic part. It is characterized in that: the electrical connector also includes Several additional terminals fixed on the insulating body, the additional terminals include a contact arm, a second fixing portion and a second welding portion, the second fixing portion connects the contact arm and the second welding portion, and the contact arm is exposed on the upper The insertion hole and the lower insertion hole, the contact arm is located behind the first and second contact parts and is spaced apart from the insulating tongue plate.

The electrical connector of the present invention increases the signal transmission channel by adding additional terminals, and the additional terminals are used to transmit high-frequency signals to increase the transmission rate of the electrical connector, which is beneficial to meet the needs of consumers for high-speed and large data transmission.

Description of drawings

FIG. 1 is a three-dimensional schematic view of the electrical connector of the present invention.

Fig. 2 is a cross-sectional view along B-B direction of Fig. 1 .

FIG. 3 is a schematic perspective view of the electrical connector of the present invention, without showing the metal shell.

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.

6 is a schematic perspective view of the first terminal and the additional terminal of the electrical connector of the present invention.

FIG. 7 is a three-dimensional schematic diagram of an electrical connector according to another embodiment of the present invention, showing that the interposer circuit board is separated from other components.

FIG. 8 is a three-dimensional schematic diagram of an electrical connector according to another embodiment of the present invention, without showing the metal shell and the transfer circuit board.

FIG. 9 is an exploded perspective view of FIG. 8 .

Detailed ways

Referring to FIGS. 1 to 6 , the electrical connector 100 of the present invention is a USB 3.0 plug connector. In other implementations, the electrical connector 100 of the present invention is a USB 3.0 receptacle connector. The electrical connector 100 includes an insulating body 10, a plurality of first terminals 20, a plurality of second terminals 30, a built-in circuit board 40, an insulating tongue plate 50, a number of additional terminals 60, and covering the insulating body 10 and the insulating tongue plate 50. A metal shell 70 , the first terminals 20 are electrically connected to the second terminals 30 through the built-in circuit board 40 .

The insulating body 10 includes a base 11, a pair of extensions 12 protruding forward from the left and right ends of the base 11, and a support 13 protruding backward from the bottom of the base 11. The pair of extensions 12 are spaced apart from each other. A receiving space 14 is formed therebetween.

The first terminals 20 are four, including a power terminal, a ground terminal and a pair of differential signal terminals located between the power terminal and the ground terminal, which conform to the USB 2.0 transmission protocol. Each first terminal 20 includes a first contact portion 21, an elastic portion 22, a first fixing portion 23 and a first welding portion 24, the first contact portion 21 is located at the front end, the first welding portion 24 is located at the rear end, and the elastic portion 22 has Elasticity, can elastically swing up and down, the elastic part 22 is connected between the first contact part 21 and the first fixed part 23, the first fixed part 23 is connected between the elastic part 22 and the first welding part 24, the first fixed part 23 Insert molding in the base 11 of the insulating body 10, the first welding part 24 is insert molding in the support part 13 and exposed on the upper surface of the support part 13, for welding together with the cable (not shown), the elastic part 22 is suspended in the air The base 11 protrudes forward from the receiving space 14 . In other embodiments, the first terminal 20 is assembled in the insulating housing 10 . The elastic portion 22 of a part of the first terminal 20 has an upwardly protruding arc portion 221, and the elastic portion 22 of the other part of the first terminal 20 has a downwardly protruding arc portion 222, which improves the elasticity of the elastic portion 22 and ensures that the elastic portion 22 can quickly return to its original shape after being deformed, prolonging the service life of the electrical connector 100 .

The second terminals 30 are four, including a power terminal, a ground terminal and a pair of differential signal terminals located between the power terminal and the ground terminal, which conform to the USB 2.0 transmission protocol. The arrangement sequence of the second terminals 30 and the first terminals 20 is opposite. The second terminal 30 is spaced apart from the insulating body 10 front and back, and the second terminal 30 is provided with a second contact portion 31 .

The circuit board 40 is arranged horizontally, with a row of first gold fingers 41 on its upper surface and a row of second gold fingers 42 on its lower surface. The first and second gold fingers 41 and 42 are electrically connected one by one. The first gold finger 41 is welded to the first contact portion 21 one by one, and the second gold finger 42 is electrically connected to the second contact portion 31 one by one, so that the first and second terminals 20 and 30 are electrically connected one by one.

The insulating tongue 50 is located in front of the insulating body 10, and is spaced from the front and back of the insulating body 10. The insulating tongue 50 is overmolded on the first and second contact portions 21, 31 and the circuit board 40, and the first contact portion 21 is exposed to the insulation. On the upper surface of the tongue plate 50 , the second contact portion 31 is exposed on the lower surface of the insulating tongue plate 50 .

There are five additional terminals 60 for transmitting high-frequency signals, which include two pairs of differential signal terminals 601 and a detection terminal 602 located between the differential signal terminals 601 at both ends, and one pair of differential signal terminals 601 is used for sending Differential signal, another differential signal terminal 601 is used to receive the differential signal. Combinations of the first terminal 20 and the second terminal 30 with the additional terminal 60 conform to the USB 3.0 transmission protocol. Each additional terminal 60 includes a pair of contact arms 611, 612, a second fixing portion 63 and a second welding portion 64, the contact arms 611, 612 are located at the front end of the additional terminal 60, the second welding portion 64 is located at the rear end, and the second The fixing portion 63 connects the contact arms 611 , 612 and the second welding portion 64 . The pair of contact arms 611, 612 are vertical sheets, which include an upper contact arm 611 and a lower contact arm 612 spaced up and down from the upper contact arm 611. The upper contact arm 611 and the lower contact arm 612 are vertically symmetrical, and There is an opening 613 between them, so that the upper contact arm 611 and the lower contact arm 612 can elastically bias toward each other. The front end of the upper contact arm 611 has an upwardly protruding arc-shaped contact piece 614 , and the front end of the lower contact arm 612 has a downwardly protruding arc-shaped contact piece 614 .

The second fixing portion 63 is inserted into the base 11 of the insulating body 10 . The contact arms 611 , 612 protrude forward from the base 11 , are located in the receiving space 14 , and are alternately arranged with the elastic portion 22 of the first terminal 20 left and right. The contact arms 611, 612 are also located behind the insulating tongue 50 and are spaced apart from the insulating tongue 50 to avoid interference between the additional terminal 50 and the insulating tongue 50. The upper contact arm 611 protrudes upwards from the first contact portion 21 and is staggered forward and backward. ; The lower contact arm 612 protrudes downward from the second contact portion 31 and is staggered forward and backward. The second welding part 64 is inserted into the supporting part 13 and exposed on the upper surface of the supporting part 13, and is used for welding together with a cable (not shown) or an adapter circuit board. The first and second welding parts 24, 64 in a row.

The metal casing 70 includes a top wall 71, a bottom wall 72 and two side walls 73 connecting the top wall 71 and the bottom wall 72, an insertion hole 75 is formed between the top wall 71, the bottom wall 72 and the two side walls 73, and the insulating tongue The plate 50 is located in the middle of the insertion hole 75 and divides the insertion hole 75 into an upper insertion hole 751 and a lower insertion hole 752. The upper insertion hole 751 and the lower insertion hole 752 have the same thickness and width and are flush up and down. The top wall 71 and the bottom wall 72 are respectively separated from the insulating tongue 50 up and down, and the two side walls 73 and the insulating tongue 50 are close to each other to allow a gap. The two sides of the insulating tongue 50 are provided with arc-shaped ribs 51 to reduce the insulating tongue. The friction between the plate 50 and the side wall 73 of the metal shell 70, the first contact part 21 and the upper contact arm 611 are exposed upward to the upper socket hole 751, and the second contact part 31 and the lower contact arm 612 are exposed downward to the lower socket Hole 752.

When the electrical connector 100 of the present invention is docked in the forward direction, the docking connector enters the upper insertion hole 751, and the insulating tongue plate 50 relies on the elasticity of the elastic portion 22 of the first terminal 20 to deflect downward, and the conductive terminal of the docking connector and the The first contact portion 21 and the upper contact arm 611 are in contact; when the electrical connector 100 is reversely docked, the butt connector enters the lower insertion hole 752, and the insulating tongue plate 50 relies on the elasticity of the elastic portion 22 of the first terminal 20 to deflect upward. Move, the conductive terminal of the docking connector contacts with the second contact portion 31 and the lower contact arm 612 . After the mating connector exits the electrical connector 100, the first terminal 20 and the insulating tongue plate 50 return to their original shape.

The electrical connector 100 of the present invention increases the additional terminal 60, and the additional terminal 60 is used to transmit high-frequency signals, increases the signal transmission channel, and improves the transmission rate of the electrical connector 100, which is conducive to satisfying consumers' requirements for high-speed, large data transmission. usage requirements.

Please refer to FIG. 7 to FIG. 9 , an electrical connector 200 according to another embodiment of the present invention is provided with an additional transfer circuit board 80 and a cable (not shown), and the transfer circuit board 80 is located behind the insulating body 10 end, through the transfer circuit board 80, so that the first terminal 20 and the additional terminal 60 are electrically connected to the cable.

A row of conductive strips 84 welded to the first terminals 20 and the additional terminals 60 are respectively arranged on the upper and lower surfaces of the adapter circuit board 80 . An IC controller 82 is also arranged on the switching circuit board 80 .

The insulating tongue plate 50 has a plurality of spacing protrusions 52 protruding backwards and spaced apart left and right. The spacing protrusions 52 are interposed between the contact arms 615 of each adjacent two additional terminals 60, limiting the contact arms. 615 displacement in the left and right directions. The first welding portion 24 of the first terminal 20 and the second welding portion 64 of the additional terminal 60 also extend out of the insulating body 10 backwards, and are arranged in another row at intervals along the left and right direction, and the first welding portion 24 is located at the edge of the second welding portion 64 Above, the first welding portion 24 is welded on the upper surface of the adapter circuit board 80 , the second welding portion 64 is welded on the lower surface of the adapter circuit board 80 , and the cables are also welded on the upper surface or the lower surface of the adapter circuit board 80 , so as to be electrically connected with the first terminal 20 , the second terminal 30 and the additional terminal 60 .

The contact arm 615 of the differential signal terminal 601 is viewed from the side and has a "T"-shaped structure. The front end of each contact arm 615 has an arc-shaped contact piece 614 protruding upward and an arc-shaped contact piece 614 protruding downward. to make contact with a mating connector (not shown). The contact arm 615 of the detection terminal 602 only has an arc-shaped contact piece 614 protruding upward, and the lower surface of the contact arm 615 is higher than the lower surface of the insulating tongue 50 .

When the electrical connector 200 is docked with the docking connector in the forward direction, the contact pieces 614 of the two pairs of differential signal terminals 601 are respectively in contact with the docking connector, while the contact pieces 614 of the detection terminal 603 are disconnected from the docking connector, one of them The differential signal terminal 601 is used to send a differential signal, and the other differential signal terminal 601 is used to receive a differential signal.

When the electrical connector 200 is oppositely connected to the butt connector, the two pairs of differential signal terminals 601 and the contact strips 614 of the detection terminal 603 are respectively in contact with the butt connector, and the IC controller 82 is connected to the signal on the transfer circuit board 80. The connection is switched, and the signal transmission directions of the two pairs of differential signal terminals 601 are exchanged, so that the forward and reverse insertion function of the electrical connector 200 is realized.

One side wall 73 of the metal shell 70 has a first upright piece 731 extending backward, and the other side wall 73 has a second upright piece 732 extending backward, the first upright piece 731 is opposite to the second upright piece 732 left and right , the metal shell 70 is also provided with a first horizontal piece 733 bent vertically inwardly from the top of the first vertical piece 732 and a second horizontal piece 733 bent vertically inwardly from the bottom end of the second upright piece 732 Sheet 734. The first and second upright pieces 731, 732 are attached to the two sides of the adapter circuit board 80, the first horizontal piece 733 is aligned with the first welding part 24 left and right, and the first horizontal piece 733 is attached to the adapter circuit board 80 surface, the second horizontal piece 734 is aligned with the second welding portion 64 left and right, the second horizontal piece 734 is attached to the lower surface of the transfer circuit board 80, the first upright piece 731, the second upright piece 732, the first horizontal piece 733, The second horizontal piece 734 clamps and fixes the adapter circuit board 80 in the up-down and left-right directions. Although preferred embodiments of the present invention have been disclosed for illustrative purposes, those of ordinary skill in the art will appreciate that various Improvements, additions, and substitutions are possible.

Claims (12)

1. a kind of electric connector, it include insulating body, some the first terminals, be electrically connected one by one with the first terminal some the Before two-terminal, an insulation hyoplastron and the metal shell for coating insulating body and the hyoplastron that insulate, the insulating body and insulation hyoplastron After be spaced apart, the first terminal and Second terminal putting in order on the contrary, the first terminal has first in left-right direction Contact site, elastic portion, the first fixed part and the first weld part, first contact site are arranged in the upper surface of insulation hyoplastron, institute State elastic portion the first contact site of connection and the first fixed part, first fixed part are fixed on insulating body, the second end Son has the second contact site, and second contact site is arranged in the lower surface of insulation hyoplastron, and the metal shell is equipped with a grafting Hole, the insulation hyoplastron are contained in spliced eye, and spliced eye is divided into upper spliced eye and lower spliced eye by the insulation hyoplastron, described Insulation hyoplastron can rely on the elasticity of elastic portion to swing up and down, it is characterised in that：The electric connector, which further includes, is fixed on insulation Some additional terminals on body, each additional terminal include contact arm, the second fixed part and the second weld part, and described second is solid Determine portion's connection contact arm and the second weld part, the contact arm is located at exposed to upper spliced eye and lower spliced eye, the contact arm The rear of first, second contact site, and be spaced apart with insulation hyoplastron.

2. electric connector according to claim 1, it is characterised in that：The contact arm is vertical sheet.

3. electric connector according to claim 1, it is characterised in that：The contact arm is tuning fork-like, it is included between the upper and lower Contact arm and contact arm once, have an opening on one separated between upper contact arm and lower contact arm, and the upper contact arm is sudden and violent Spliced eye is exposed to, the lower contact arm is exposed to lower spliced eye.

4. electric connector according to claim 3, it is characterised in that：The upper contact arm front end has protruding upward in exhausted There is the downwardly projecting arc in insulation hyoplastron lower surface to connect for the arc contact chip of edge hyoplastron upper surface, the lower contact arm front end Contact.

5. electric connector according to claim 1, it is characterised in that：The elastic portion and contact arm or so it is staggered into One row.

6. electric connector according to claim 1, it is characterised in that：The electric connector includes being insert molded in insulation tongue An internal circuit board in plate, the circuit board upper surface have one to ranked first golden finger, and lower surface has one to ranked second golden hand Refer to, first contact site welds one by one with the first golden finger, and second contact site welds one by one with the second golden finger.

7. electric connector according to claim 1, it is characterised in that：The elastic portion of a part of the first terminal is bent with upwards The curved portion of protrusion, the elastic portion of another part the first terminal are bent with downwardly projecting curved portion.

8. the electric connector described in any one in claim 1-7, it is characterised in that：First, second terminal 2.0 transport protocols of USB are corresponded with, the combination of the first terminal and additional terminal meets 3.0 transport protocols of USB.

9. electric connector according to claim 1, it is characterised in that：The insulation hyoplastron has to be protruded out and between left and right backward Some interval convex portions separated, interval convex portion is between the contact arm of each adjacent two additional terminal.

10. electric connector according to claim 1, it is characterised in that：The electric connector further includes a switching circuit board And a cable, the cable are electrically connected by switching circuit board with the first terminal and additional terminal, first, second weld part It is respectively welded on switching circuit board, the additional terminal includes two pairs of difference signal terminals and positioned at two pairs of differential signal ends An inspection terminal between son, is provided with the switching circuit board to promote two pairs of difference signal terminals to exchange signals to pass The one IC controllers in defeated direction.

11. electric connector according to claim 1, it is characterised in that：The contact arm laterally observed of the additional terminal, is in "T"-shaped construction, each contact arm front end have an arc contact chip protruding upward and a downwardly projecting arc contact chip.

12. electric connector according to claim 1, it is characterised in that：The electric connector further includes a switching circuit board, First, second weld part is welded in the upper and lower surface of switching circuit board respectively, and the metal shell includes roof, bottom wall And the left and right sides wall of connection roof and bottom wall, wherein one side wall have one first vertical piece to extend back, another side wall tool There is one second vertical piece to extend back, the first vertical piece and the second vertical piece or so are opposite, and metal shell is additionally provided with from first The first level piece and prolong from the perpendicularly inward lateral bending folding in the second vertical piece bottom that the perpendicularly inward lateral bending folding in vertical piece top extends One second horizontal plate stretched, first, second vertical piece abut in the left and right side of switching circuit board, first level piece and the first weldering Socket part or so is alignd, and first level piece abuts in switching circuit board upper surface, and the second horizontal plate and second weld part or so align, Second horizontal plate abuts in switching circuit board lower surface.