CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of the filing date under 35 U.S.C. ยง 119(a)-(d) of Chinese Patent Application No. 201711462429.2, filed on Dec. 28, 2017.
FIELD OF THE INVENTION
The present invention relates to a connector and, more particularly, to a connector including an insulation body and a row of contacts arranged on the insulation body.
BACKGROUND
An input/output connector (I/O connector) generally includes an insulation body and at least one row of contacts arranged in parallel on the insulation body. Each of the contacts has a fixation portion fixed to the insulation body, a solder foot at an end of the contact, a contact portion at an opposite end of the contact, a connection portion between the fixation portion and the solder foot, and an elastic arm between the fixation portion and the contact portion. The insulation body has a plurality of insulation partition ribs protruding from the insulation body, and the elastic arms of two adjacent contacts are separated by one of the insulation partition ribs.
The elastic arms of the contacts are positioned so as to avoid a short circuit between the elastic arms. However, because the insulation partition rib is disposed between the elastic arms, the width of the contacts and the spacing between adjacent contacts is limited, which restricts the performance of the connector and is particularly disadvantageous for suppressing resonance of the connector.
SUMMARY
A connector comprises an insulation body having a plurality of first insulation partition ribs and a row of first contacts arranged on the insulation body at a first pitch. The row of first contacts includes a plurality of first ground contacts and a plurality of first signal contacts. At least two first signal contacts are disposed between two adjacent first ground contacts. Each of the first ground contacts and each of the first signal contacts has a first contact portion, a first fixation portion, and a first elastic arm between the first contact portion and the first fixation portion. Each first insulation partition rib is disposed between the first elastic arm of each first ground contact and the first elastic arm of one first signal contact adjacent to the first ground contact. No insulation rib is disposed between the first elastic arms of any two adjacent first signal contacts.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described by way of example with reference to the accompanying Figures, of which:
FIG. 1 is a perspective view of a connector according to an embodiment;
FIG. 2 is an exploded perspective view of the connector;
FIG. 3A is a perspective view of a first arm positioning body and a row of first contacts of the connector;
FIG. 3B is a sectional end view of the first arm positioning body and the row of first contacts;
FIG. 4A is a perspective view of a second arm positioning body and a row of second contacts of the connector;
FIG. 4B is a sectional end view of the second arm positioning body and the row of second contacts; and
FIG. 5 is a graph of a far-end crosstalk between signal contacts and ground contacts both in the connector and in another connector in which no insulation partition ribs are disposed between any two adjacent contacts.
DETAILED DESCRIPTION OF THE EMBODIMENT(S)
Embodiments of the present invention will be described hereinafter in detail with reference to the attached drawings, wherein like reference numerals refer to the like elements. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided so that the disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art.
A connector according to an embodiment, as shown in FIGS. 1 and 2, includes an insulation body 300 and at least one row of contacts 10, 20. The at least one row of contacts 10, 20 are arranged on the insulation body 300 at a pitch. In the shown embodiment, the connector includes a row of first contacts 10 and a row of second contacts 20. In other embodiments, the connector may include one row of contacts or three or more rows of contacts.
As shown in FIGS. 1 and 2, the row of first contacts 10 is arranged on the insulation body 300 at a first pitch. The row of first contacts 10 includes a plurality of first ground contacts 11 and a plurality of first signal contacts 12. At least two first signal contacts 12 are disposed between two adjacent first ground contacts 11. Each of the first ground contacts 11 includes a first contact portion 11a, a first fixation portion 11c, and a first elastic arm 11b between the first contact portion 11a and the first fixation portion 11c. Each of the first signal contacts 12 includes a first contact portion 12a, a first fixation portion 12c, and a first elastic arm 12b between the first contact portion 12a and the first fixation portion 12c. In the embodiment shown in FIGS. 2, 3A, and 3B, a pair of first signal contacts 12, 12 are disposed between two adjacent first ground contacts 11. In an embodiment, the pair of first signal contacts 12, 12 are a pair of differential signal contacts.
As shown in FIGS. 2, 3A, and 3B, no insulation partition rib is disposed between the first elastic arms 12b, 12b of any two adjacent first signal contacts 12, 12; the insulation body 300 does not have any insulation partition rib for separating the first elastic arms 12b, 12b of the adjacent first signal contacts 12, 12. The insulation body 300 has a first insulation partition rib 311b disposed between the first elastic arm 11b of each first ground contact 11 and the first elastic arm 12b of each first signal contact 12 adjacent to the first ground contact 11 so as to separate the first elastic arm 11b of the first ground contacts 11 from the first elastic arm 12b of the first signal contacts 12 adjacent to the each first ground contact 11.
A row of second contacts 20, as shown in FIGS. 1 and 2, is positioned below the row of first contacts 10 and is arranged on the insulation body 300 at a second pitch. In an embodiment, the second pitch is equal to the first pitch. The row of second contacts 20 includes a plurality of second ground contacts 21 and a plurality of second signal contacts 22. At least two second signal contacts 22 are disposed between two adjacent second ground contacts 21. Each of the second ground contacts 21 includes a second contact portion 21a, a second fixation portion 21c, and a second elastic arm 21b between the second contact portion 21a and the second fixation portion 21c. Each of the second signal contacts 22 includes a second contact portion 22a, a second fixation portion 22c, and a second elastic arm 22b between the second contact portion 22a and the second fixation portion 22c. In the embodiment shown in FIGS. 2, 4A, and 4B, a pair of second signal contacts 22, 22 are disposed between two adjacent second ground contacts 21. In an embodiment, the pair of second signal contacts 22, 22 are a pair of differential signal contacts.
As shown in FIGS. 2, 4A, and 4B, no insulation partition rib is disposed between the second elastic arms 22b, 22b of any two adjacent second signal contacts 22, 22; the insulation body 300 does not have any insulation partition rib for separating the second elastic arms 22b, 22b of the adjacent second signal contacts 22, 22. The insulation body 300 has a second insulation partition rib 312b disposed between the second elastic arm 21b of each second ground contact 21 and the second elastic arm 22b of the second signal contacts 22 adjacent to the second ground contact 21 so as to separate the second elastic arm 21b of each second ground contact 21 from the second elastic arm 22b of the second signal contacts 22 adjacent to the second ground contact 21.
As shown in FIGS. 1 and 2, each of the first ground contacts 11 includes a first solder foot 11e and a first connection portion 11d between the first solder foot 11e and the first fixation portion 11c. Each of the first signal contacts 12 includes a first solder foot 12e and a first connection portion 12d between the first solder foot 12e and the first fixation portion 12c. Similarly, each of the second ground contacts 21 includes a second solder foot 21e and a second connection portion 21d between the second solder foot 21e and the second fixation portion 21c, and each of the second signal contacts 22 includes a second solder foot 22e and a second connection portion 22d between the second solder foot 22e and the second fixation portion 22c.
The insulation body 300, as shown in FIGS. 1 and 2, includes a first fixing body 321, a second fixing body 322, a connection portion positioning body 330, a first arm positioning body 311, and a second arm positioning body 312. The first fixation portion 11c, 12c of each of the first contacts 10 is fixed to the first fixing body 321. The second fixation portion 21c, 22c of each of the second contacts 20 is fixed to the second fixing body 322. The first connection portion 11d, 12d of each of the first contacts 10 is positioned on an outer side of the connection portion positioning body 330, and the second connection portion 21d, 22d of each of the second contacts 20 is positioned on an inner side of the connection portion positioning body 330. The first elastic arm 11b, 12b of each of the first contacts 10 is positioned on the first arm positioning body 311. The second elastic arm 21b, 22b of each of the second contacts 20 is positioned on the second arm positioning body 312.
In the embodiment shown in FIGS. 1 and 2, the first fixing body 321, the second fixing body 322, the connection portion positioning body 330, the first arm positioning body 311, and the second arm positioning body 312 are assembled together to form the complete insulation body 300. In another embodiment, the insulation body 300 may also be a single molded piece that is formed on the row of first contacts 10 and the row of second contacts 20 by a molding process.
As shown in FIGS. 3A and 3B, each of the first insulation partition ribs 311b is formed on the first arm positioning body 311 to separate the first ground contact 11 from the first signal contacts 12 adjacent to the first ground contact 11. A row of first positioning protrusions 311a are formed on the first arm positioning body 311, and each of the first positioning protrusions 311a is located between the first contact portions 12a of two adjacent first signal contacts 12 to separate the two adjacent first signal contacts 12 from each other. The first contact portion 11a and the first elastic arm 11b of each of the first ground contacts 11 are positioned between two first insulation partition ribs 311b. The first elastic arm 12b of each of the first signal contacts 12 is positioned between the first positioning protrusion 311a and the first insulation partition rib 311b.
As shown in FIGS. 4A and 4B, each of the second insulation partition ribs 312b is formed on the second arm positioning body 312 to separate the second ground contact 21 from the second signal contacts 22 adjacent to the second ground contact 21. A row of second positioning protrusions 312a are formed on the second arm positioning body 312, and each of the second positioning protrusions 312a is located between the second contact portions 22a of two adjacent second signal contacts 22 to separate the two adjacent second signal contacts 22 from each other. The second contact portion 21a and the second elastic arm 21b of each of the second ground contacts 21 are positioned between two second insulation partition ribs 312b. The second elastic arm 22b of each of the second signal contacts 22 is positioned between the second positioning protrusion 312a and the second insulation partition rib 312b.
A far-end crosstalk between the signal contacts 12, 22 and the ground contacts 11, 21 is shown in FIG. 5 in a case where there are insulation partition ribs 311b, 312b only between each ground contact 11, 21 and the signal contact 12, 22 adjacent to the each ground contact 11, 21, as in the connector described herein, and a far-end crosstalk between the signal contacts and the ground contacts in a case where there are no insulation partition ribs between any two adjacent contacts. In a case where there are no insulation partition ribs between any two adjacent contacts, there is a large far-end crosstalk between the signal contacts and the ground contacts and the peak value (i.e., resonance) of the crosstalk is also large when an operating frequency is lower than 25 GHz. In the connector described herein, there is a small far-end crosstalk between the signal contacts 12, 22 and the ground contacts 11, 21 and the peak value (i.e., resonance) of the crosstalk is also small when an operating frequency is lower than 25 GHz. Therefore, the resonance of the connector is suppressed in the present disclosure by providing the insulation partition ribs 311b, 312b only between each ground contacts 11, 21 and the signal contacts 12, 22 adjacent to the ground contact 11, 21, improving the performance of the connector.
Patent Grant
10868386
