BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to an electrical connector having the corresponding contact module equipped with grounding bars. This invention is an improvement to the provisional application 63/053,611 filed on Jul. 18, 2020.
2. Description of Related Art
U.S. Pat. No. 8,764,460, issued on Jul. 1, 2014, discloses an electrical connector having a first row of contact pins. The first row of contact pins comprises a first grounding pin, a second grounding pin, and a first signal pin arranged between the first grounding pin and the second grounding pin. A grounding bar electrically connects the first grounding pin and the second grounding pin. The grounding bar and the grounding pin are an integral structure which will waste more materials during manufacturing.
An improved electrical device is desired.
SUMMARY OF THE INVENTION
The electrical connector includes a contact module received within an insulative housing. The contact module includes an upper contact unit and a lower contacts unit stacked with each other. Each of the upper contact unit and the lower contact unit includes a front/outer contact part and a rear/inner contact part each including a plurality of side by side arranged contacts integrally formed with a plurality of plastic tie bars at different positions via insert-molding. The contacts include a plurality of differential pair signal contacts and a plurality of grounding contacts alternately arranged with each other along a transverse direction. Each plastic tie bar includes an insulative primary part integrally formed with all contacts via a first insert-molding process, and a conductive secondary part integrally formed with the primary part and the grounding contacts via a second insert-molding process after the first insert-molding process.
Other advantages and novel features of the invention will become more apparent from the following detailed description of the present embodiment when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1(A) is a perspective view front of an electrical connector according to a first embodiment of the first invention;
FIG. 1(B) is another perspective view of the electrical connector of FIG. 1(A);
FIG. 2(A) is an exploded perspective view of the electrical connector of FIG. 1(A);
FIG. 2(B) is another exploded perspective view of the electrical connector of FIG. 2(A);
FIG. 3(A) is a further exploded perspective view of the electrical connector of FIG. 2(A);
FIG. 3(B) is another exploded perspective view of the electrical connector of FIG. 3(A);
FIG. 4(A) is an exploded perspective view of the contact module of the electrical connector of FIG. 3(A);
FIG. 4(B) is another exploded perspective view of the contact module of the electrical connector of FIG. 4(A);
FIG. 5(A) is a further exploded perspective view of the contact module of the electrical connector of FIG. 4(A);
FIG. 5(B) is another exploded perspective view of the contact module of the electrical connector of FIG. 5(A);
FIG. 6(A) is an exploded perspective view of the upper contact unit of the contact module of the electrical connector of FIG. 5(A);
FIG. 6(B) is another exploded perspective view of the upper contact module of the electrical connector of FIG. 6(A);
FIG. 7(A) is an exploded perspective view of the lower contact unit of the contact module of module of the electrical connector of FIG. 5(A);
FIG. 7(B) is another exploded perspective view of the lower contact unit of the contact module of the electrical connector of FIG. 7(A);
FIG. 8(A) is an exploded perspective view of the contact module of the electrical connector of FIG. 4(A) without showing the conductive secondary parts of the plastic tie bars;
FIG. 8(B) is an exploded perspective view of the contact module of FIG. 8(A) without showing the plastic tie bars;
FIG. 9(A) is a perspective view of the contacts of the front/outer contact part of the upper contact unit of the contact module of the electrical connector of FIG. 1(A);
FIG. 9(B) is another perspective view of the front/outer contact part of the upper contact unit of the contact module the electrical connector of FIG. 8(A) without showing the corresponding insulative primary part;
FIG. 10 is a side view of the contact module of the electrical connector of FIG. 1(A);
FIG. 11(A) is a cross-sectional view of the electrical connector of FIG. 1(A);
FIG. 11(B) is another cross-sectional view of the electrical connector of FIG. 1(A);
FIG. 12 is another cross-sectional view of the electrical connector of FIG. 1(A);
FIG. 13(A) is a perspective view of an electrical connector according to a second embodiment of the first invention;
FIG. 13(B) is another perspective view of the electrical connector of FIG. 13(A);
FIG. 14(A) is an exploded perspective view of the electrical connector of FIG. 13(A);
FIG. 14(B) is another exploded perspective view of the electrical connector of FIG. 14(A);
FIG. 15(A) is a further exploded perspective view of the electrical connector of FIG. 14(A);
FIG. 15(B) is another exploded perspective view of the electrical connector of FIG. 15(A);
FIG. 16(A) is an exploded perspective view of the contact module of the electrical connector of FIG. 15(A);
FIG. 16(B) is another exploded perspective view of the contact module of the electrical connector of FIG. 16(A);
FIG. 17(A) is a further exploded perspective view of the contact module of the electrical connector of FIG. 16(A);
FIG. 17(B) is another exploded perspective view of the contact module of the electrical connector of FIG. 17(A);
FIG. 18(A) is an exploded perspective view of the upper contact unit of the contact module of the electrical connector of FIG. 17(A);
FIG. 18(B) is another exploded perspective view of the upper contact module of the electrical connector of FIG. 18(A);
FIG. 19(A) is an exploded perspective view of the lower contact unit of the contact module of module of the electrical connector of FIG. 17(A);
FIG. 19(B) is another exploded perspective view of the lower contact unit of the contact module of the electrical connector of FIG. 19(A);
FIG. 20(A) is an exploded perspective view of the contact module of the electrical connector of FIG. 16(A) without showing the conductive secondary parts of the plastic tie bars;
FIG. 20(B) is an exploded perspective view of the contact module of FIG. 20(A) without showing the plastic tie bars;
FIG. 21(A) is a perspective view of the contacts of the front/outer part of the upper contact unit of the contact module of the electrical connector of FIG. 13(A);
FIG. 21(B) is another perspective view of the upper contact unit of the contact module the electrical connector of FIG. 20(A) without showing the corresponding insulative primary part;
FIG. 22 is a side view of the contact module of the electrical connector of FIG. 13(A);
FIG. 23(A) is a cross-sectional view of the electrical connector of FIG. 13(A);
FIG. 23(B) is another cross-sectional view of the electrical connector of FIG. 13(A); and
FIG. 24 is another cross-sectional view of the electrical connector of FIG. 13(A).
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Reference will now be made in detail to the embodiments of the present disclosure.
Referring to FIGS. 1(A)-12, an electrical connector 100 includes an insulative housing 110 cooperating with an insulative cover 108 to commonly receive a contact module 120 therein. The contact module 120 includes an upper contact unit 122 and a lower contact unit 124 stacked with each other in the vertical direction in essentially a mirror image arrangement. The upper contact unit 122 includes an (upper) front/outer contact part 130 and an (upper) rear/inner contact part 140 stacked with each other in the vertical direction, and the lower contact unit 124 includes a (lower) front/outer contact part 160 and a (lower) rear/inner contact part 150 stacked with each other in the vertical direction.
The upper front/outer contact part 130 includes a plurality of contacts 132 integrally formed with a plurality of transversely extending plastic tie bars 135 via insert-molding. The plurality of plastic tie bars 135 are arranged along the extending direction of the contact 132. Each plastic tie bars 135 includes an insulative primary part 134 and a conductive secondary part 136. Similarly, the upper rear/inner contact part 140 includes a plurality of contacts 142 integrally formed with a plurality of transversely extending plastic tie bars 145 via insert-molding and each plastic tie bar 145 includes an insulative primary part 144 and a conductive secondary part 146; the lower front/outer contact part 160 includes a plurality of contacts 162 integrally formed with a plurality transversely extending plastic tie bars 165, and each plastic tie bar includes an insulative primary part 164 and a conductive secondary part 166; the lower rear/inner contact part 150 includes a plurality of contacts 152 integrally formed with a plurality of transversely extending plastic tie bars 155 and each plastic tie bar 155 includes an insulative primary part 154 and a conductive secondary part 156. In the (upper) front/outer contact part 130, the (upper) rear/inner contact part 140, the (lower) front/outer contact part 160 and the (lower) rear/inner contact part 150, the (upper) front/outer contact part 130 has the longest dimension in the front-to-rear direction. The number of the plastic tie bars 135 forms on the (upper) front/outer contact part 130 is more than the number of plastic tie bars on other contact parts. Notably, as shown in FIGS. 6(A)-7(B), the insulative primary part 134 forms a plurality of upwardly facing funnel like recesses H, and the conductive secondary part 136 forms a plurality of downwardly extending protrusions 138 received within the corresponding recess H. Similarly, the conductive secondary part 146 forms the protrusions 148, the conductive secondary part 166 forms the protrusions 168 and the conductive second part 156 forms the protrusions 158 for respectively reception with the corresponding recesses H in the corresponding insulative primary parts.
The contacts 132 include a plurality of differential-pair signal contacts 1322 and a plurality of grounding contacts 1321 alternately arranged with each other in the transverse direction. At least one pair of differential-pair signal contacts 1322 is disposed between a pair of the grounding contacts 1321. Similarly, the contacts 142 having the corresponding differential-pair signal contacts 1422 and grounding contacts 1421, the contacts 162 having the corresponding differential-pair signal contacts 1622 and grounding contacts 1621, and the contacts 152 having the corresponding differential-pair signal contacts 1522 and grounding contacts 1521, are also alternately arranged with each other in the transverse direction. Because the arrangement between the plastic tie bar and the corresponding contacts is essentially same to each contact part, only the upper front/outer contact part is illustrated. As shown in FIGS. 6(B), 7(B) and 9(A)-12, each contact 132 includes a front deflectable resilient contacting section 171 for mating with a mating connector, a rear mounting section 173 for mounting to a printed circuit board and a retaining section 172 therebetween to retain the contact in the housing, the mounting section 173 soldered to the circuit board. Each contact 132 includes a cantilever arm that cantilever forward. The front deflectable resilient contacting section 171 is located at the front of the cantilever arm. The contacts 132 are all side-to-side coupled from the front deflectable resilient contacting section 171 to the mounting section 173. The width of the two grounding contacts 1321 located at the outermost side in the lateral direction is smaller than the width of the other grounding contacts 1321. The center distance between the differential-pair signal contacts 1322 from the contacting section 171 to the mounting section 173 is constant. The center distance between the grounding contact 1321 and the signal contact 1322 adjacent to it from the contacting section 171 to the mounting section 173 is constant. The center distance refers to the distance from the center line of one contact to the center line of the other contact. The width of the retaining section 172 of the grounding contact 1321 is greater than the width of the retaining section 172 of the signal contact 1322. The cantilever arm of each grounding contact 1321 is provided with an opening 1323 to reduce the elastic force. The width of the grounding contact 1321 where the opening 1323 is provided is greater than the width of the contacting section 171. The opening 1323 extends along the length of the contact. The opening 1323 does not extend to the contacting section 171. The periphery of the opening 1323 is completely contained in the grounding contact 1321. The opening 1323 is not covered by the plastic tie bars 135. The length of each contact 132 fixed in the plastic tie bars 135 is less than half of the length of the retaining section. The retaining section 172 includes a horizontal section 1721, a vertical section 1722 and an oblique section 1723 therebetween. Via insert-molding, two plastic tie bars 135 are integrally formed upon the horizontal section 1721, and a plastic tie bars 135 is integrally formed upon the vertical section 1722, thus commonly forming the whole (upper) front/outer contact part 130 as a whole. The width of the contact 132 in t plastic tie bars 135 is smaller than the width of other parts of the retaining section 172. At least two of the plastic tie bars 135 are connected together to increase the overall stability of the (upper) front/outer contact part 130. The two plastic tie bars 135 arranged on the horizontal section 1721 are connected to each other on the corresponding two sides in the transverse direction. The two sides of the insulative primary part 134 of the two plastic tie bars 135 arranged in the horizontal section 1721 are connected together, but the conductive secondary part 136 is not connected together. The insulative primary part 134 of the plastic tie bars 135 at the front includes a main body 1341 and two connecting portions 1342 extending backward on both corresponding sides of the main body 1341. The connecting portion 1342 is connected to the plastic tie bars 135 at the rear of the horizontal section 1721. The connecting portion 1342 is not molded with any contact 132. Wherein the grounding contact 1321 is further equipped with a pair of holes 172H. The funnel like recesses H of insulative primary part 134 are aligned with the corresponding grounding contacts 1321 and particularly to the holes 172H of the corresponding grounding contacts 1321 so as to allow the corresponding protrusions 138 to be received within the holes 172H for creating a reliable mechanical and electrical connection between the conductive secondary part 136 and the grounding contacts 1321. Understandably, without the holes 172H to receive the material of the conductive secondary part 136, the conductive secondary part 136 still contacts the upper surface of the grounding contact 1321 for establishing the electrical connection. Notably, in this first embodiment, the conductive secondary part 136 does not occupy the recess 134H which is formed in the insulative primary part 134 and located under the pair of holes 172H. The opening 1323 of the grounding contact 1321 is located in front of the hole 172H
In brief, in the upper front/outer contact part 130, all the contacts 132 are firstly integrally formed within the insulative primary part 134 to form an initial piece via a first stage insert-molding while leaving the tunnel like recesses H to upwardly expose the corresponding grounding contacts 1321, and the conductive secondary part 136 is successively applied, via a second stage insert-molding, upon such an initial piece to fill the corresponding tunnel like recesses H so as to electrically connect all the grounding contacts 1321, but not connected to the signal contact 1322. Therefore, all the contacts 132 are not only securely embedded within the plastic tie bar 135 essentially composed of the insulative primary part 134 and the conductive secondary part 136 from a mechanical viewpoint but also all connected for the grounding contacts 1321 from the electrical viewpoint. All grounding contacts 1321 are electrically connected into a whole through conductive secondary part.
FIGS. 13(A)-24 show the second embodiment wherein all structures thereof are essentially same with those of the first embodiment of FIGS. 1(A)-12 except that each of the protrusions 138 further includes a plate 139 at the bottom end as shown in FIGS. 18(B) and 21(B) to fill the corresponding hole 134H which is empty in FIG. 11(A) of the first embodiment but being filled by the plate 139 as shown in FIGS. 23(A) and 24. The conductive secondary part 136 is formed in the hole 134H through the hole 172H to form the plate 139. Understandably, the plate 139 may enhance mechanical integral securement among the insulative primary part 134, the conductive secondary part 136 and the grounding contacts 1321.
Although the present invention has been described with reference to particular embodiments, it is not to be construed as being limited thereto. Various alterations and modifications can be made to the embodiments without in any way departing from the scope or spirit of the present invention as defined in the appended claims.
Patent Grant
12176645
