BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electrical receptacle connector, and more particularly to an I/O receptacle connector having a mating tongue with contacting sections of the corresponding contacts on two opposite surfaces thereon wherein a shielding/reinforcement plate between the two opposite surface under condition that the shielding/reinforcement plate are mechanically and electrically connected to some of the grounding contacts.
2. Description of Related Art
A connector capable of transmitting high-speed differential signals is used as an interface connector or an internal connector of a digital appliance or a PC. Such connector includes a plurality of signal contacts and a plurality of ground contacts. The signal contacts are paired in order to transmit differential signals in the manner known in the art. Generally, on the side of a fitting portion or a contacting portion side of the connector is fitted to or contacted with a mating connector. On the other hand, on the terminal portion side of the contacts to be connected to a board, the terminal portions are arranged in a plurality of rows because the terminal portions are inserted into a plurality of through holes, respectively.
At present, transmission of high-speed differential signals is required in a growing number of software applications. Under the circumstances, there is a demand for an improved connector having a compact size, a low piece, and excellent high-frequency characteristics.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide an electrical connector. The electrical connector comprises a metallic shell defining a mating cavity opening forwards, a terminal module assembly received in the metallic shell, and a shielding plate being located between an upper surface and a lower surface of the terminal module assembly. The terminal module assembly defines a front region exposed in the mating cavity to function as a mating tongue. The terminal module assembly defines an insulator associated with a plurality of contacts with corresponding contacting sections exposed upon opposite upper and lower faces of the mating tongue, said contacts are categorized with differential pairs and grounding contacts. The shielding plate defines a main plate and grounding fingers split from the main plate to directly touch with corresponding grounding contacts. The shielding plate is embedded with the terminal module assembly and the grounding fingers of the shielding plate are fixed with the insulator of the terminal assembly. .
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of a receptacle connector and a printed circuit board on which the connector is mounted, in accordance with a first embodiment of the present invention;
FIG. 2 is a front elevational view of the receptacle connector mounted on the printed circuit board of FIG. 1;
FIG. 3 is an enlarged partial front elevational view of the receptacle connector shown in FIG. 2;
FIG. 4 is an exploded perspective view of the receptacle connector of FIG. 1;
FIG. 5 is an exploded perspective view of the insulating seat of FIG. 4;
FIG. 6 is a cross-sectional view of the insulating seat along broken lines 6-6 of FIG. 4;
FIG. 7 is an exploded perspective view of the terminal module assembly of FIG. 5;
FIG. 8 is a cross-sectional view of the insulating seat along broken lines 8-8 of FIG. 5;
FIG. 9 is a cross-sectional view of the upper terminal module along broken lines 9-9 of FIG. 7;
FIG. 10 is an exploded perspective view of the upper terminal module of FIG. 7;
FIG. 11 is a perspective view of the upper terminal module of FIG. 7, wherein an upper portion of the upper terminal module is removed to clearly show the shielding plate;
FIG. 12 is a perspective view of the upper terminal module of FIG. 7, wherein an upper portion of the upper terminal module is removed to clearly show an engagement of the contacts and the shielding plate;
FIG. 13 is a perspective view of a receptacle connector in accordance with a the present invention, which is adapted for mating with a plug connector;
FIG. 14 is a perspective view of an insulating seat in accordance with a second embodiment of the present invention;
FIG. 15 is an enlarged partial perspective view of the insulating seat of FIG. 14;
FIG. 16 is a perspective view of shielding plate assembled in the insulating seat of FIG. 14;
FIG. 17 is a cross-sectional view of the receptacle connector of the first embodiment; and
FIG. 18 is a cross-sectional view of the receptacle connector of the second embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Reference will now be made in detail to the first preferred embodiment of the present invention.
Referring to FIGS. 1 through 4, in a first embodiment an electrical receptacle connector 100 which is adapted to be mounted to a printed circuit board (PCB) 50 wherein the printed circuit board 50 defines a notch 52 in which a lower portion of the connector 100 is disposed so as to form a sink type arrangement. The connector 100 includes an insulating seat 10 loaded with contacts 26 and a metallic shell 40 surrounding the insulating seat 10, thereby defining a mating cavity 14 extending forwards in a front-and-back direction. The insulating seat 10 defines a mating tongue 101 extending forwards and into the mating cavity 14. The metallic shell 40 defines a pair of front legs 401 and a pair of rear legs 402 along the front-to-back direction thereof, which are adapted for being mounted on the PCB 50. The insulating seat 10 mainly includes an insulating compression housing 12 with a receiving cavity 120 and a terminal module assembly 20 is inserted into and then retained in the receiving cavity 120 of the insulating compression housing 12. A plurality of compression lugs 121 are formed on a front region of the housing 12 around the receiving cavity 120 to press against the contacts 26. The housing 12 defines thin lugs 122 along the front region of the housing and the metallic shell 40 is interfered with the thin lugs 122 for a good retention between the housing and the shell. The very brief overview of the electrical connector 100 is given. The detail structure of elements of the electrical connector 100 and an assembly of the electrical connector 100 will be given hereinafter
Referring to FIGS. 5 through 6, the terminal module assembly 20 is, from a rear side of the housing 12, inserted into and disposed in the receiving cavity 120. The housing 12 defines a front longitudinal opening 123 and a rear receiving recess 124 opening to the rear face and bottom thereof, both of which commonly form said receiving cavity 120. The terminal module assembly 20 includes a front region 201 and a rear region 202, the front region projecting beyond a front face 125 of the housing 12 through the longitudinal opening 123, therefore the front region 201 is functioned as the mating tongue 101 which is received in the receiving cavity 14 as shown in FIG. 2. The rear region 202 is received the receiving recess 124 when the terminal module assembly 20 is inserted from the rear face of the housing 12. The terminal module assembly 20 comprises two rows of contacts 26 arranged on opposite surfaces thereof and the terminal module assembly 20 is embedded with a shielding plate 30 between the upper and lower rows of the contacts 26 which will be described thereinafter. Legs 262a, 262b of the contacts are arranged on the rear faces and bottom face of the insulating seat 10 respectively.
Referring to FIGS. 5, 7 and 8, the terminal module assembly 20 includes an upper terminal module 22 and a lower terminal module 24. Each of the upper terminal module 22 and the lower terminal module 24 includes an insulator 25 associated with the plurality of contacts 26. The contacts 26 are categorized with differential pairs 2601, grounding contacts 2602 and power contacts 2603, wherein the grounding contacts 2602 is longer than the differential pairs and power contacts 2603 in the front-to-back direction. The insulator 25 of the upper terminal module 22 defines a complete front region 251 which is functioned as the mating tongue 101 as shown in FIGS. 2 and 4. The contacts 26 of the lower terminal module 22 are integrally formed with the insulator 25 of the lower terminal module 24 via an insert molding process. The contacting sections 261b of the contacts in the lower terminal module 24 project forwards beyond a front face 241 of insulator of the lower terminal module. Combination with FIG. 9, the insulator 25 of the upper terminal module 22 further defines a plurality of lower grooves 255 in the lower face 254 to receive the contact portions 261b of the contacts 26 of the lower terminal module 24 and a rear recess 256 to receive the insulator of the lower terminal module 24. The insulator 25 of the lower terminal module 24 is equipped with a pair of latches 242 at two opposite lateral sides to lock to the insulator 25 of the upper terminal module 22 when the lower terminal module 24 is inserted into the rear recess 256 from a lower-to-upper direction. The contacts 26 of the upper and lower rows are aligned with each other in the lower-and-upper direction.
Referring to FIGS. 7 and 9-12, the upper terminal module 22 further is equipped with the shielding plate 30 integrally embedded therein via an insert molding process wherein two grounding fingers 31 extend upward to be exposed upon an upper face 253 of the upper terminal module 22 as best shown in FIGS. 9 and 10. The shielding plate is unitarily formed with the corresponding insulator via an insert molding process. A plurality of upper grooves 254 are formed in the upper face 253 of the upper terminal module 22, and the contacts 26a of the upper terminal module 22 are downwardly inserted into and then received within the corresponding upper grooves 253 in the upper face 252, respectively, wherein two grounding contacts 2602a, 2602b downwardly press against the corresponding two grounding fingers 31, respectively. Please notes, the shielding plate 30 is firstly embedded in the insulator of the upper module and then the upper contacts 26a are inserted in to the insulator as shown in FIG. 10. As shown in FIGS. 11 and 12 wherein the upper portion of the insulator 25 of the upper terminal module 22 is cut away to best show the shielding plate 30, the shielding plate 30 has a main plate 32 and two grounding fingers 31 are split from a front edge of the main plate and bending upwards so as to contact the grounding contacts. A front distal free end 311 of each grounding finger 31 bends downward and substantially co-planes with the main plate as best shown in FIGS. 8 and 9, the shielding plate 30 projects forwards beyond the contacts 26. As shown in FIG. 12, the grounding contacts 2602a, 2602b contacts with the grounding fingers 31 while other grounding contacts are separated from the shielding plate 28. The grounding fingers 31 of the shielding plate are fixed with the insulator of the terminal assembly, i.e., the grounding fingers 31 being immovably supported by material of the insulator 25 and can not move in the vertical direction.
As mentioned earlier, the assembled terminal module assembly 20 is assembled into the receiving cavity 120 of the compression housing 12 wherein the compression lugs 121 press the corresponding contacts 26, respectively, to assure the contacts 26 are firmly received in the corresponding grooves 253, 255, respectively. Understandably, the selected two grounding contacts 2602a, 2602b are forced to press against the corresponding grounding fingers 31 by the corresponding compression lugs 121 to establish the reliable grounding effect. Clearly, the front portion of the terminal module assembly 20 extends forwardly beyond the housing 12 to be functioned as the mating tongue 101.
The assembled housing 12 and terminal module assembly 20 are further forwardly assembled into the metallic shell 40 to form the complete connector 100 which is adapted to be mounted to the printed circuit board 50.
Referring to FIGS. 13 through 17, in an alternative or second embodiment those two selected grounding contacts 2602 of the electrical receptacle connector 100′ extend downwardly to directly contact the main plate 32 of the shielding plate 30′ rather than contacting the grounding fingers 31. On the other hand, the shielding plate 30′ further includes two folded type tip sections 51 in front of those two selected grounding contacts in the front-to-back direction so as to comply with the mated plug 60 disclosed in FIG. 13. Understandably, the folded type tip sections 51 also reinforce securement between the insulator 25 of the upper terminal module 22 and the shielding plate 30′. Each of the select two contacts 2602 has an elastic arm 264 extending downwards to press against the main plate 32 of the shielding plate 30′. The shielding plate defines leg 33 to be soldered to the PCB. The elastic arm 264 and the folded type tip section 51 are aligned with each other in the front-and-back direction. Understandably, the contact 2602 is shorter than other adjacent contacts so as to improve impedance and reduce crosstalk between adjacent pairs.
Referring to FIGS. 17 and 18 shown the difference engagement of the grounding contacts of the first embodiment and the second embodiment, the corresponding grounding terminal of the plug 60 directly contacts the corresponding grounding contact 26 of the connector 100 which presses the corresponding grounding finger 30 in the first embodiment as shown in FIG. 17 while the grounding terminal of the plug 60 directly contacts the folded type tip section 51 without contacting the grounding contact 2602 in the second embodiment as shown in FIG. 18. It is noted that in these embodiments, the upper terminal module includes a front insulator unit A and a rear insulator unit B rather than one insulator disclosed in the previous embodiments, wherein the front/middle insulator unit A forms the mating tongue with the shielding plate embedded therein via an insert-molded manner while the rear/upper insulator unit B is associated with the corresponding contacts in an insert-molded manner. Therefore, the rear insulator unit B with the associated contacts 26 is downwardly assembled to an upper side of the front insulator unit A, and the (lower) insulator C of the lower terminal module with the associated contacts 26 is upwardly assembled to the lower side of the front insulator unit A, and then all the front insulator unit A, the rear insulator unit B and the insulator C of the lower terminal module are commonly forwardly assembled into the housing 100/100′.
While a preferred embodiment in accordance with the present invention has been shown and described, equivalent modifications and changes known to persons skilled in the art according to the spirit of the present invention are considered within the scope of the present invention as described in the appended claims
Patent Application
20140187086
