CN109149276B - Electrical connector - Google Patents

Abstract

The invention discloses an electric connector, which comprises an insulating body, wherein an axis is defined at the center of the insulating body; at least one terminal group is arranged on the insulating body, the terminal group comprises two power supply terminals respectively positioned on two sides of the axis and two differential signal pairs respectively positioned on the outer sides of each power supply terminal, each differential signal pair is provided with two first bending parts which are closed oppositely, each power supply terminal is provided with a second bending part which is closed towards the first bending part on the same side, the second bending part and the first bending part ensure that the distance between the power supply terminal and the differential signal terminal is unchanged, the area distribution of each part of the whole power supply terminal is uniform, the size is basically consistent, when high-frequency signals are transmitted, the impedance of each part of the power supply terminal is the same, the potential difference generated by the power supply terminal can be avoided, the terminal group is further prevented from becoming an interference source and generating electromagnetic interference, and the high.

Description

Electrical connector

Technical Field

The present invention relates to an electrical connector, and more particularly, to an electrical connector with good high frequency transmission performance.

Background

With the development of electronic technology, the signal transmission rate and frequency are higher and higher, and therefore higher requirements are put on the high-frequency transmission performance of the electrical connector. The connector comprises a rubber core seat and a panel terminal group, wherein the panel terminal group sequentially comprises a ground terminal, a differential signal terminal pair, a power terminal and other panel terminals from left to right, the differential signal terminal pair is provided with extension parts which are closed towards each other, and meanwhile, the power terminal is provided with a widened part which protrudes towards the extension parts of the differential signal terminal pair so as to keep the distance between the power terminal and the differential signal terminal pair unchanged.

Because the power supply terminal has the widened part, the area distribution of the whole power supply terminal is not uniform, when a high-frequency signal is transmitted, the impedance of the widened part is different from that of other parts of the power supply terminal, the widened part and other parts generate a potential difference, so that the widened part becomes an interference source, and the power supply terminal can generate electromagnetic interference on other terminals, thereby influencing the high-frequency transmission performance of the electric connector.

Therefore, there is a need for an improved electrical connector that overcomes the above problems.

Disclosure of Invention

In view of the problems in the background art, an object of the present invention is to provide an electrical connector with good high frequency transmission performance, in which a second bent portion of a power terminal is disposed to be close to a first bent portion of a differential signal pair, so as to achieve the purpose of reducing electromagnetic interference between the power terminal and the differential signal pair.

In order to achieve the purpose, the invention adopts the following technical means:

an electrical connector, comprising: an insulating body defining an axis at a center of the insulating body; at least one terminal group is located insulator, terminal group is including being located respectively the two power supply terminals of axis both sides with be located every respectively two differential signal pairs in the power supply terminal outside, each differential signal pair has two first kinks and draws close in opposite directions, each the power supply terminal has a second kink and draws close towards the homonymy first kink.

Further, the terminal group further comprises two ground terminals respectively located on the outer sides of the differential signal pairs, and each ground terminal is provided with a third bending part which is close to the first bending part.

Further, the third bending portion is parallel to the adjacent first bending portion, and the second bending portion is parallel to the adjacent first bending portion.

Furthermore, four signal terminals are arranged between the two power supply terminals, and each signal terminal is provided with a fourth bending part which is close to the axis.

Further, the power terminal includes a connecting portion extending rearward from the second bent portion, the signal terminal also includes a connecting portion extending rearward from the fourth bent portion, and a distance between the connecting portion of the power terminal and the connecting portion of the signal terminal is greater than a distance between the connecting portions of the two signal terminals.

Furthermore, the signal terminal comprises an extension part arranged behind the fourth bending part and a welding part extending backwards from the extension part, the extension part is deflected towards the direction far away from the axis, and in the two signal terminals positioned on two sides of the axis, the distance between the two welding parts is greater than the distance between the two connecting parts.

Further, each terminal of the terminal group is provided with the extension parts, the extension parts on one side of the axis are parallel to each other, and the extension parts on the other side of the axis are also parallel to each other.

Furthermore, the electric connector comprises a shielding sheet positioned in the insulating body and a metal shell covering the insulating body, the shielding sheet is provided with at least one first fixing part penetrating out of the insulating body, and the first fixing part is provided with a first through hole; the metal shell is provided with at least one second fixing part, the second fixing part is provided with a second through hole, the second fixing part and the first fixing part are arranged in a stacked mode, the second through hole is vertically aligned with the first through hole, and the second fixing part and the first fixing part are welded and fixed.

Furthermore, the shielding sheet is provided with at least one grounding pin, and the grounding pin is formed by bending and extending the first fixing part.

Further, a plastic shell covers the insulating body and the metal shell, the plastic shell is provided with at least one third fixing portion covering the first fixing portion and the second fixing portion, the third fixing portion is provided with a third through hole, and the third through hole is vertically aligned with the second through hole and the first through hole.

Further, the first fixing portion is exposed at a bottom surface of the third fixing portion.

Furthermore, the insulation body protrudes with at least one protruding part, the metal shell is provided with at least one opening, and the protruding part is embedded with the opening and exposed on the surface of the plastic shell.

Furthermore, the insulation body, the metal shell and the plastic shell jointly form a glue filling groove, and a waterproof rubber plate is contained in the glue filling groove.

Further, a metal inner shell is arranged between the metal outer shell and the insulating body, the metal inner shell is provided with a main body portion and a contraction portion, the metal outer shell abuts against the main body portion, and the metal outer shell covers the contraction portion.

Further, the insulating body comprises a base part, a tongue plate and a thickened part for connecting the base part and the tongue plate, the main body part wraps the tongue plate, the contraction part wraps the thickened part, the base part is provided with a stop surface, and the stop surface stops the contraction part.

Compared with the prior art, the invention has the following beneficial effects: the center of insulator is defined with the axis the same one side of the axis left and right sides, two first kink draw close each other in opposite directions, the second kink also towards first kink draws close in opposite directions, the second kink with first kink has guaranteed the power supply terminal with the interval between the difference news signal terminal is unchangeable, and the whole the area distribution of each part of power supply terminal is even, the size is unanimous basically, when transmitting high frequency signal, the impedance of each part of power supply terminal is the same, can avoid power supply terminal itself produces the potential difference, further avoids terminal group itself becomes the interference source and produces electromagnetic interference, simultaneously, the power supply terminal is to the homonymy differential signal pair forms a shielding protection, consequently is favorable to the high frequency transmission performance of electric connector. In the injection molding process of the insulating body, more plastic can be filled between the two power terminals, so that the fixing effect of the terminal group on the insulating body and the strength of the insulating body are enhanced.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of the electrical connector of the present invention;

FIG. 2 is a partial assembly view of FIG. 1;

FIG. 3 is a partial assembly view of FIG. 2;

FIG. 4 is a partial assembly view of FIG. 3;

FIG. 5 is a partial assembly view of FIG. 4;

FIG. 6 is a partial assembly view of another view of FIG. 5;

fig. 7 is a schematic perspective view of the shielding plate of fig. 1 sandwiched between two rows of terminals;

fig. 8(a) is a top view of the lower row of terminals in fig. 1;

fig. 8(B) is a plan view of the upper row of terminals in fig. 1.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

As shown in fig. 1, 2 and 3, the electrical connector of the present invention includes an insulating body 1, two rows of upper andlower terminal sets 2, a shielding plate 3, an upper grounding plate 4, alower grounding plate 5, a metalinner shell 6, a metal outer shell 7, aplastic shell 8, awaterproof ring 9 and awaterproof rubber plate 10, wherein an axis X is defined at the center of the insulating body 1, and the axis X bisects the upper row of theterminal sets 2 and the lower row of theterminal sets 2. The electrical connector is a USB TYPE C socket for soldering to a circuit board (not shown, the same applies below). Of course, in other embodiments, other types of electrical connectors are possible.

As shown in fig. 1, 2 and 3, the insulative housing 1 is composed of an upper housing 11, alower housing 12 and anouter housing 13. The upper body 11 has a firstmain body 111 and afirst fixing seat 112, thelower body 12 has a secondmain body 121 and asecond fixing seat 122, the firstmain body 111 and the secondmain body 121 are engaged with each other, and thefirst fixing seat 112 and thesecond fixing seat 122 are engaged with each other. Theouter body 13 covers the front portions of the firstmain body 111 and the secondmain body 121 to form atongue plate 14 and a thickenedportion 15 in sequence, the rear portions of thefirst fixing seat 112 and thesecond fixing seat 122 form abase 16, and the front end surface of thebase 16 is astop surface 161. Thefirst fixing base 112 protrudes upward to form twoprotrusions 1121.

As shown in fig. 1, fig. 3, fig. 8(a) and fig. 8(B), each row of theterminal group 2 has a plurality of terminals, which are sequentially divided into aground terminal 21, a differential signal pair 22, apower terminal 23, foursignal terminals 24, apower terminal 23, a differential signal pair 22 and aground terminal 21 from left to right, wherein the differential signal pair 22 is composed of twodifferential signal terminals 221. Eachground terminal 21 is divided into acontact portion 211, athird bending portion 212, a connectingportion 213, an extendingportion 214 and asoldering portion 215 from front to back; eachdifferential signal terminal 221 is divided into acontact portion 211, afirst bending portion 222, a connectingportion 213, an extendingportion 214 and asoldering portion 215 from front to back in sequence; eachpower terminal 23 is sequentially divided into acontact portion 211, asecond bending portion 231, a connectingportion 213, an extendingportion 214 and awelding portion 215 from front to back; eachsignal terminal 24 is divided into acontact portion 211, afourth bending portion 241, a connectingportion 213, an extendingportion 214 and asoldering portion 215 from front to back. Thecontact portion 211 is exposed on the upper and lower surfaces of thetongue plate 14, and thewelding portion 215 extends beyond the lower surface of thebase portion 16. Theground terminal 21 extends laterally from the connectingportion 213 to form afirst ground portion 216.

As shown in fig. 3, 8(a) and 8(B), fig. 8(a) shows the lower row of terminals, and fig. 8(B) shows the upper row of terminals. On the same side of the left and right sides of the axis X, the twofirst bending portions 222 are close to each other, and thesecond bending portion 231 is also close to thefirst bending portion 222. Thethird bending portion 212 is also close to thefirst bending portion 222, thesecond bending portion 231 is parallel to the adjacentfirst bending portion 222, thethird bending portion 212 is parallel to the otherfirst bending portion 222, and the two parallel directions are different.

As shown in fig. 3, 8(a) and 8(B), the middle fourfourth bending portions 241 are all close to the axis X, and by thesecond bending portion 231 and thefourth bending portions 241, the distance L1 between the connectingportion 213 of thepower terminal 23 and the connectingportion 213 of theadjacent signal terminal 24 is increased, L1 is greater than the distance L2 between the other two adjacent connectingportions 213, the axis X bisects a row of the extendingportions 214, the extendingportion 214 on the left side is offset toward the left side, the extendingportion 214 on the right side is offset toward the right side, so that the distance L3 between the twowelding portions 215 closest to the axis X is greater than the distance L2 between theconnecting portions 213 of the twosignal terminals 24, the extendingportions 214 on the left side of the axis X are parallel to each other, the extendingportions 214 on the right side of the axis X are also parallel to each other, the two parallel directions are also different, and L3 is greater than the distance L4 between theother welding portions 215.

As shown in fig. 1, 3 and 7, afirst fixing portion 31 and asecond grounding portion 33 extend laterally from each of the left and right sides of the shielding plate 3, and thesecond grounding portion 33 is located in front of thefirst fixing portion 31 to contact thefirst grounding portion 216. Thefirst fixing portion 31 extends out of thebase portion 16. Thefirst fixing portion 31 has a first throughhole 32. Eachfirst fixing portion 31 is bent to extend a groundingpin 34 to be grounded with the circuit board.

As shown in fig. 3, 4 and 5, theinner metal shell 6 has amain body portion 61 and aconstricted portion 62, themain body portion 61 covers thetongue plate 14, theconstricted portion 62 covers the thickenedportion 15, and a rear edge of theconstricted portion 62 is stopped at thestop surface 161, so as to prevent theinner metal shell 6 from retreating. The metal outer shell 7 is covered on the metalinner shell 6, the front edge of the metal outer shell 7 abuts against thebody part 61, and the metal outer shell 7 covers thecontraction part 62 and is fixed by laser welding, so that the metal outer shell 7 can be connected with the metalinner shell 6 more tightly. The left side and the right side of the metal shell 7 are respectively provided with asecond fixing portion 71, thesecond fixing portion 71 is provided with a second throughhole 72, thesecond fixing portion 71 is stacked above thefirst fixing portion 31 and fixed by laser welding, and the second throughhole 72 is aligned with the first throughhole 32 up and down. The metal shell 7 has twoopenings 73 for engaging with theprotrusions 1121.

As shown in fig. 4, 5 and 6, theplastic housing 8 covers the insulation body 1, the metalinner shell 6 and the metal outer shell 7, theplastic housing 8 surrounds theprotrusion 1121, and theprotrusion 1121 is exposed on the surface of theplastic housing 8, so that theprotrusion 1121 is used to achieve a firm connection between the insulation body 1 and theplastic housing 8, thereby reducing the risk of separation from each other. The left side and the right side of theplastic housing 8 are respectively provided with athird fixing portion 81, the third fixingportion 81 covers the first fixingportion 31 and the second fixingportion 71, and the first fixingportion 31 is exposed at the bottom surface of the third fixingportion 81. Thethird fixing portion 81 has a third throughhole 82, and the third throughhole 82 is aligned with the second throughhole 72 and the first throughhole 32 up and down for receiving a screw (not shown) so that the electrical connector is positioned on the circuit board. Theplastic housing 8 has arecess 83 at the front end for receiving and positioning thewaterproof ring 9.

As shown in fig. 5 and 6, theplastic housing 8, the insulating body 1, and the metal shell 7 together form aglue filling groove 84, and theglue filling groove 84 is located on the bottom surface of the electrical connector and is used for accommodating thewaterproof glue board 10, so as to seal the gap between theplastic housing 8 and the bottom surfaces of the insulating body 1 and the metal shell 7.

As shown in fig. 1, 2 and 3, the electrical connector is formed by the following steps: s1: the upper body 11 is formed by injection molding of the upper row of terminals and the upper ground contact 4, the upper ground contact 4 is exposed at the upper surface of the upper body 11, the lower row of terminals, the lower ground contact 5 and the shield plate 3 are formed by injection molding of the lower body 12, and the lower ground contact 5 is exposed at the lower surface of the lower body 12; s2: the upper body 11 and the lower body 12 are stacked and then injection-molded to form an outer body 13, the upper body 11, the lower body 12 and the outer body 13 constitute the insulation body 1, the upper grounding sheet 4 is exposed on the upper surfaces of the tongue plate 14 and the thickened portion 15, and the lower grounding sheet 5 is exposed on the lower surfaces of the tongue plate 14 and the thickened portion 15; s3: referring to fig. 4, the inner metal shell 6 is formed by stretching, the inner metal shell 6 covers the insulation body 1, and the inner metal shell 6 is laser welded to the upper grounding piece 4 and the lower grounding piece 5; s4: referring to fig. 5, the metal outer shell 7 is formed by stamping and covers the insulating body 1 and the metal inner shell 6, the metal outer shell 7 and the metal inner shell 6 are welded by laser, and the second fixing portion 71 is welded by laser with the first fixing portion 31; s5: referring to fig. 6, the plastic housing 8 is injection molded outside the insulation body 1, the metal inner shell 6 and the metal outer shell 7, and the waterproof ring 9 is injection molded outside the insulation outer shell; s6: the glue pouring groove 84 forms the waterproof glue board 10 by means of glue pouring.

In summary, the electrical connector of the present invention has the following advantages:

(1) on the same side of the left side and the right side of the axis X, the two first bending portions 222 are close to each other, the second bending portion 231 is close to the first bending portion 222, the third bending portion 212 is close to the first bending portion 222, the second bending portion 231 and the first bending portion 222 ensure that the distance between the power terminal 23 and the differential signal terminal is not changed, the third bending portion 212 and the first bending portion 222 ensure that the distance between the ground terminal 21 and the differential signal terminal is not changed, the area distribution of each part of the power terminal 23 and the whole ground terminal 21 is uniform, the size of each part of the ground terminal 21 is basically consistent, when high-frequency signals are transmitted, the impedance of each part of the power terminal 23 is the same, the impedance of each part of the ground terminal 21 is the same, and the power terminal 23 can be prevented from being connected to each other, The ground terminal 21 itself generates a potential difference, further avoiding the terminal group 2 itself from becoming an interference source and generating electromagnetic interference, and meanwhile, the power terminal 23 and the ground terminal 21 form a shielding protection for the differential signal pair 22 on the same side, thereby being beneficial to the high-frequency transmission performance of the electrical connector.

(2)Third kink 212 court first kink 222 draws close to each other,second kink 231 court first kink 222 draws close to each other,fourth kink 241 court axis X draws close to,power supply terminal 23 connectingportion 213 andadjacent signal terminal 24 distance L1 between connectingportion 213 is greater than other two adjacent distance L2 between connectingportion 213 insulator 1 injection moulding's in-process, the plastic can be filledmore ground terminal 21 with between the side reason ofhyoplastron 14,power supply terminal 23 is rather adjacent between thesignal terminal 24, two promptly between thepower supply terminal 23, consequently be favorable to strengtheningground terminal 21 withpower supply terminal 23signal terminal 24 is located insulator 1's fixed effect with insulator 1's intensity.

(3) The extendingportion 214 on the left side of the axis X is deflected towards the left side, and the extendingportion 214 on the right side is deflected towards the right side, so that the distance L3 between the twosoldering portions 215 closest to the axis is greater than the distance L2 between the connectingportions 213 of the twosignal terminals 24 and is also greater than the distance L4 between theother soldering portions 215, and during the injection molding of the insulative housing 1, plastic can be filled more between the twosoldering portions 215 closest to the axis, thereby facilitating to enhance the holding force of thesignal terminals 24 on thebase 16.

(4) Thesecond fixing portion 71 is stacked above the first fixingportion 31 and fixed by laser welding, and the metal shell 7 and the shielding plate 3 are in contact with the first fixingportion 31 through the second fixingportion 71 to increase the grounding contact and the grounding area of the electric connector, so that the shielding effect of the electric connector is enhanced.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and drawings are included in the scope of the present invention.

Claims (15)

1. An electrical connector, comprising:

an insulating body defining an axis at a center of the insulating body;

at least one end subgroup locates insulator, the terminal group is including being located respectively the two power supply terminals of axis both sides with be located every respectively two differential signal pairs in the power supply terminal outside, each differential signal pair has two first kinks and draws close in opposite directions, each the power supply terminal has a contact site, a second kink and a connecting portion in the past backward in proper order, the power supply terminal the contact site width equals the power supply terminal the width of connecting portion, the second kink is towards the homonymy first kink draws close, makes connecting portion arrive distance between the differential signal pair equals the contact site arrives distance between the differential signal pair.

2. The electrical connector of claim 1, wherein: the terminal group further comprises two grounding terminals respectively positioned on the outer sides of the differential signal pairs, and each grounding terminal is provided with a third bending part which is close to the first bending part.

3. The electrical connector of claim 2, wherein: the third bending portion is parallel to the adjacent first bending portion, and the second bending portion is parallel to the adjacent first bending portion.

4. The electrical connector of claim 1, wherein: two be equipped with four signal terminal between the power supply terminal, each signal terminal has a fourth kink and all faces the axis draws close.

5. The electrical connector of claim 4, wherein: the power terminal comprises a connecting part which extends backwards from the second bending part, the signal terminal also comprises a connecting part which extends backwards from the fourth bending part, and the distance between the connecting part of the power terminal and the connecting part of the signal terminal is greater than the distance between the connecting parts of the two signal terminals.

6. The electrical connector of claim 5, wherein: the signal terminal comprises an extension part and a welding part, the extension part is arranged behind the fourth bending part, the welding part extends backwards from the extension part, the extension part deflects towards the direction far away from the axis, and in the two signal terminals positioned on two sides of the axis, the distance between the two welding parts is larger than the distance between the two connecting parts.

7. The electrical connector of claim 6, wherein: each terminal of the terminal group is provided with the extending parts, the extending parts positioned on one side of the axis are parallel to each other, and the extending parts positioned on the other side of the axis are also parallel to each other.

8. The electrical connector of claim 1, wherein: the electric connector comprises a shielding sheet positioned in the insulating body and a metal shell covering the insulating body, wherein the shielding sheet is provided with at least one first fixing part penetrating out of the insulating body, and the first fixing part is provided with a first through hole; the metal shell is provided with at least one second fixing part, the second fixing part is provided with a second through hole, the second fixing part and the first fixing part are arranged in a stacked mode, the second through hole is vertically aligned with the first through hole, and the second fixing part and the first fixing part are welded and fixed.

9. The electrical connector of claim 8, wherein: the shielding piece is provided with at least one grounding pin, and the grounding pin is formed by bending and extending the first fixing part.

10. The electrical connector of claim 8, wherein: the plastic shell covers the insulating body and the metal shell, the plastic shell is provided with at least one third fixing part for covering the first fixing part and the second fixing part, the third fixing part is provided with a third through hole, and the third through hole is vertically aligned with the second through hole and the first through hole.

11. The electrical connector of claim 10, wherein: the first fixing part is exposed at the bottom surface of the third fixing part.

12. The electrical connector of claim 10, wherein: the insulating body protrudes with at least one protruding part, the metal shell is provided with at least one opening, and the protruding part is embedded with the opening and is exposed on the surface of the plastic shell.

13. The electrical connector of claim 10, wherein: the insulation body, the metal shell and the plastic shell jointly form a glue filling groove, and a waterproof rubber plate is contained in the glue filling groove.

14. The electrical connector of claim 8, wherein: the metal shell and the insulating body are provided with a metal inner shell, the metal inner shell is provided with a main body part and a contraction part, the metal outer shell is abutted against the main body part, and the metal outer shell covers the contraction part.

15. The electrical connector of claim 14, wherein: the insulating body comprises a base part, a tongue plate and a thickened part for connecting the base part and the tongue plate, the main body part covers the tongue plate, the contraction part covers the thickened part, the base part is provided with a stop surface, and the stop surface stops the contraction part.

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