1. Technical Field
This disclosure relates to an electrical connector, and more particularly to an anti-electromagnet interference (EMI) electrical connector and a terminal assembly thereof.
2. Related Art
A signal terminal performs signal transmission through high-frequency current switching. Therefore, when a high-frequency current passes through the signal terminal and is switched rapidly, a magnetic field is generated around the signal terminal.
In an electrical connector in the prior art, a pitch between the terminals is quite small, since the number of small-sized signal terminals is high. When the signal terminal generates the magnetic field, an EMI phenomenon is likely to occur between the adjacent signal terminals, causing a transmission error, and affecting a transmission efficiency of the signal terminals.
In order to solve the EMI phenomenon between the adjacent terminals, taking a Double Data Rate (DDR) connector as an example, a terminal arrangement manner thereof is to arrange the signal terminals and ground pins in a staggered manner with intervals, so as to shield the EMI between the adjacent signal terminals through the ground pins. However, the above ground pin can only shield the EMI to a limited degree; if the arrangement of the terminals is more intensive, a shielding effect of the ground pin is very limited.
Accordingly, this disclosure provides an anti-electromagnet interference (EMI) electrical connector and a terminal assembly thereof, so as to eliminate EMI between terminals.
At least one embodiment of this disclosure provides an anti-electromagnet interference (EMI) electrical connector. The anti-EMI electrical connector includes an electrical insulation case, a plurality of first terminals, and a plurality of second terminals.
The electrical insulation case includes a slot. Each of the first terminals is respectively disposed in the electrical insulation case, and each of the first terminals respectively includes a contact end located in the slot. Each of the second terminals is respectively disposed in the electrical insulation case, and the second terminals and the first terminals are arranged in a staggered manner.
Each of the second terminals respectively includes a connection end located in the slot and adjacent to the contact end of at least one first terminal, in which a sectional area of the connection end of the second terminal is larger than a sectional area of the contact end of the first terminal.
The sectional area of the connection end is larger than the sectional area of the contact end. Therefore, when a high-frequency signal is transmitted between the first terminals, the resulting the resulting EMI is effectively blocked by the connection end of the second terminal, thereby eliminating the EMI between the first terminals.
At least one embodiment of this disclosure further provides a terminal assembly. The terminal assembly is provided to be combined with an electrical insulation case, so as to form an anti-EMI electrical connector. The terminal assembly includes a fixing seat, a plurality of first terminals, and a plurality of second terminals.
The first terminals are fixed on the fixing seat, and each of the first terminals respectively includes a contact end. The second terminals are fixed on the fixing seat, in which the second terminals and the first terminals are arranged in a staggered manner. Each of the second terminals respectively includes a connection end adjacent to the contact end of at least one first terminal, and a sectional area of the connection end is larger than a sectional area of the contact end.
In the terminal assembly described previously, the sectional area of the connection end is larger than the sectional area of the contact end. Therefore, when a high-frequency signal is transmitted by the first terminals, the resulting EMI is effectively shielded by the connection end of the second terminals, thereby eliminating the EMI between the first terminals.
In the this disclosure, the sectional area of the connection end is larger than the sectional area of the contact end, that is, the sectional area of the second terminal is increased to increase an effective shielding area and improve electrical characteristics. When the first terminal performs data transmission, shielding of the second terminal can be used to block the EMI, therefore achieving an objective of maintaining electronic signal quality.
Preferred embodiments and efficacies thereof of this disclosure are hereinafter described with reference to the accompanying drawings.
The disclosure will become more fully understood from the detailed description given herein below for illustration only and thus not limitative of this disclosure, wherein:
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The first terminal 20 further includes a first welding end 220 and a first locating end 230. The first welding end 220 is provided to be welded on a circuit board, such as a computer motherboard, so that the electrical connector is fixed on the circuit board through the first welding end 220 of the first terminal 20, and further electrically connects the circuit board. The first locating end 230 is provided to be combined with the electrical insulation case 10, in which the first locating end 230 further includes a barb 231 for snapping the electrical insulation case 10, therefore the first terminal is combined with the electrical insulation case 10 in a clamping manner.
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Each of the second terminals 30 includes a connection end 310 located in the slot 110 and adjacent to at least one of the contact ends 210 of the first terminals 20. For example, the connection end 310 at an outermost side is located at a side edge of one contact end 210, but the connection end 310 and the contact end 210 do not contact each other; and the rest of the connection ends 310 are located between the two contact ends 210. The number of the connection ends 310 and the contact ends 210 may be set correspondingly, or the number of the connection ends 310 may be larger than, equal to, or smaller than the number of the contact ends 210.
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In an implementation manner of the embodiment, the second terminals 30 are electrically grounded to serve as ground pins. It is noted that, in order to increase the sectional area of the second terminal 30, an original insert molding structure is modified to an insert terminal structure. Each of the second terminals 30 further includes a second welding end 320 and a second locating end 330. The second welding end 320 is provided to be welded on a circuit board, such as a computer motherboard, so that the electrical connector is fixed on the circuit board through the second welding end 320 of the second terminal 20, and further electrically connects a grounding circuit of the circuit board. The second locating end 330 is provided to be combined with the electrical insulation case 10. The second locating end 330 further includes a barb 331 for snapping the electrical insulation case 10.
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The second terminals 30 are fixed on the fixing seat 40. The second terminals 30 and the first terminals 20 are arranged in a staggered manner. Each of the second terminals 30 respectively includes a connection end 310 adjacent to at least one contact end 210, and a sectional area of the connection end 310 is larger than a sectional area of the contact end 210.
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This description of the second terminal 30 combined with the fixing seat 40 is merely an example, and substitute methods may be used to combine the second terminals 30 with the fixing seat 40 through inserting, or combine the first terminals 20 or the second terminals 30 with the fixing seat 40 in an insert molding manner.
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While the present invention has been described by the way of example and in terms of the preferred embodiments, it is to be understood that the invention need not to be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structures.
Number | Name | Date | Kind |
---|---|---|---|
5259768 | Brunker et al. | Nov 1993 | A |
5522737 | Brunker et al. | Jun 1996 | A |
5580257 | Harwath | Dec 1996 | A |
5730609 | Harwath | Mar 1998 | A |
5813883 | Lin | Sep 1998 | A |
6015299 | Walse et al. | Jan 2000 | A |
6019639 | Brunker et al. | Feb 2000 | A |
6095821 | Panella et al. | Aug 2000 | A |
6254435 | Cheong et al. | Jul 2001 | B1 |
6358061 | Regnier | Mar 2002 | B1 |
6361367 | Daikuhara et al. | Mar 2002 | B1 |
6394823 | Dunham et al. | May 2002 | B1 |
6561850 | Letourneau et al. | May 2003 | B2 |
6805586 | Akama et al. | Oct 2004 | B2 |
RE38736 | Walse et al. | May 2005 | E |
6923664 | Ito et al. | Aug 2005 | B2 |
6994563 | Amini et al. | Feb 2006 | B2 |
7048567 | Regnier et al. | May 2006 | B2 |
7410392 | Szczesny et al. | Aug 2008 | B2 |
7591684 | Zhang et al. | Sep 2009 | B2 |
7604510 | Akama et al. | Oct 2009 | B2 |
7806730 | Szczesny et al. | Oct 2010 | B2 |
7824224 | Su et al. | Nov 2010 | B2 |
8036284 | Horowitz et al. | Oct 2011 | B2 |
8047875 | Yamakami et al. | Nov 2011 | B2 |
8152539 | Moriyama et al. | Apr 2012 | B2 |
8231411 | Westman et al. | Jul 2012 | B1 |
20030003804 | Letourneau et al. | Jan 2003 | A1 |
20030060083 | Akama et al. | Mar 2003 | A1 |
20040018759 | Wu | Jan 2004 | A1 |
20040242071 | Ito et al. | Dec 2004 | A1 |
20070184718 | Akama et al. | Aug 2007 | A1 |
20100190385 | Yamakami et al. | Jul 2010 | A1 |
20120225588 | Westman et al. | Sep 2012 | A1 |
Number | Date | Country | |
---|---|---|---|
20130052865 A1 | Feb 2013 | US |