Patent Publication Number: US-10312646-B2

Title: Flippable electrical connector

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of co-pending application Ser. No. 14/667,632 filed on 24 Mar. 2015, which is a continuation-in-part of the co-pending application Ser. No. 14/558,732 filed Dec. 3, 2014, and the instant application further claims the benefit of, and priority to, U.S. Provisional Patent Application No. 61/977,115, filed Apr. 9, 2014, the contents of which are incorporated entirely herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electrical connector, and more particularly to a flippable plug connector used with a receptacle connector. 
     2. Description of Related Art 
     In the previously filed provisional applications, the plug connector is “flippable” whereas we turn the plug over and it functions the same top and bottom. In order to be able to handle switching of the super speed signaling, a MUX (or SS switch) is built into the silicon. This can be costly and also cause some additional degredation in the super speed signals. Recently, a proposal for use with the future USB (Universal Serial Bus) was presented. 
     Hence, a new and simple electrical plug connector and the complementary receptacle connector are desired to improve those disclosed in the aforementioned proposal. 
     SUMMARY OF THE INVENTION 
     Accordingly, the object of the present invention is to provide a receptacle connector assembly. The assembly comprises an outer housing and a terminal module. The terminals module includes an insulator having a base and a mating tongue extending from the base and equipped with a plurality of contacts and a shielding plate. The contacts include front contacting sections exposed upon the mating tongue and tail sections extending out of the base. The shielding plate is embedded within the mating tongue and includes a pair of rigid notches in two opposite lateral sides for locking to a pair of corresponding latches of a complementary plug connector. The outer housing is of an insulative moulding part or a metallic die cast, the terminal module is assembled in the outer housing, and thus a mating cavity is directly defined between the mating tongue and the outer housing to be inserted with the complementary plug connector. 
     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 assembled perspective view of a mated receptacle connector on the printed circuit board and a plug connector of a first embodiment of the instant invention. 
         FIG. 2  is a rear exploded perspective view of the receptacle connector and the plug connector of  FIG. 1 . 
         FIG. 3  is a front perspective view of the receptacle connector spaced from the printed circuit board of  FIG. 1 . 
         FIG. 4(A)  is a front partially exploded perspective view of the receptacle connector of  FIG. 1 . 
         FIG. 4(B)  is a rear partially exploded perspective view of the receptacle connector of  FIG. 1 . 
         FIG. 5  is a front partially exploded perspective view of the receptacle connector of  FIG. 1  without the shield thereof. 
         FIG. 6(A)  is a front partially exploded perspective view of the receptacle connector of  FIG. 1  to show the housing and the contacts thereof. 
         FIG. 6(B)  is a rear partially exploded perspective view of the receptacle connector of  FIG. 1  to show the housing and the contacts thereof. 
         FIG. 7(A)  is a front partially exploded perspective view of the receptacle connector of  FIG. 1  wherein the housing and the contacts are pre-assembled together. 
         FIG. 7(B)  is a rear partially exploded perspective view of the receptacle connector of  FIG. 1  wherein the housing and the contacts are pre-assembled together. 
         FIG. 8(A)  is a cross-sectional view of the receptacle connector on the printed circuit board of  FIG. 1  to show the retention tang of the shield; 
         FIG. 8(B)  is a cross-sectional view of the receptacle connector to show the extending plate of the collar. 
         FIG. 9  is a front assembled perspective view of the plug connector of  FIG. 1 . 
         FIG. 10  is a front partially exploded perspective view of the plug connector of  FIG. 1  wherein the cover is removed away from the remainder. 
         FIG. 11  is a front partially exploded perspective view of the plug connector of  FIG. 10  wherein the front and rear over-moldings have been further removed. 
         FIG. 12  is a rear partially exploded perspective view of the plug connector of  FIG. 10 . 
         FIG. 13(A)  is a front partially exploded perspective view of the plug connector of  FIG. 12  by removal of additional parts therefrom. 
         FIG. 13(B)  is a rear partially exploded perspective view of the plug connector of  FIG. 13(A) . 
         FIG. 14  is a cross-sectional view of the mated plug connector and receptacle connector of  FIG. 1  to show how the latch of the plug connector is lockable engaged with the shielding plate of the receptacle connector. 
         FIG. 15(A)  is a front assembled perspective view of a second embodiment of the receptacle connector mounted to the printed circuit board. 
         FIG. 15(B)  is a rear assembled perspective view of the receptacle connector mounted upon the printed circuit board of  FIG. 15(A) . 
         FIG. 16(A)  is a front exploded perspective view of the receptacle connector on the printed circuit board of  FIG. 15(A) . 
         FIG. 16(B)  is a rear exploded perspective view of the receptacle connector on the printed circuit board of  FIG. 15(B) . 
         FIG. 17(A)  is a further front exploded perspective view of the receptacle connector of  FIG. 16(A) . 
         FIG. 17(B)  is a further rear exploded perspective view of the receptacle connector of  FIG. 16(B) . 
         FIG. 18  is a further front exploded perspective view of the receptacle connector of  FIG. 17(A) . 
         FIG. 19  is a further front exploded perspective view of the receptacle connector of  FIG. 18 . 
         FIG. 20  is a cross-sectional view of the receptacle connector mounted upon the printed circuit board of  FIG. 15(A) . 
         FIG. 21(A)  is a front assembled perspective view of a third embodiment of the receptacle connector mounted upon the printed circuit board. 
         FIG. 21(B)  is a rear assembled perspective view of the receptacle connector mounted upon the printed circuit board of  FIG. 21(A) . 
         FIG. 22(A)  is a front exploded perspective view of the receptacle connector mounted upon the printed circuit board of  FIG. 21(A) . 
         FIG. 22(B)  is a rear exploded perspective view of the receptacle connector mounted upon the printed circuit board of  FIG. 21(B) . 
         FIG. 23(A)  is a further front exploded perspective view of the receptacle connector of  FIG. 21(A) . 
         FIG. 23(B)  is a further rear exploded perspective view of the receptacle connector of  FIG. 21(B) . 
         FIG. 24  is a further front exploded perspective view of the receptacle connector of  FIG. 23(A) ; 
         FIG. 25  is further rear exploded perspective view of the receptacle connector of  FIG. 24 . 
         FIG. 26  is a cross-sectional view of the receptacle connector mounted upon the printed circuit board of  FIG. 21(A) . 
         FIG. 27(A)  is a front assembled perspective view of a fourth embodiment of the receptacle connector mounted upon the printed circuit board; 
         FIG. 27(B)  is a rear assembled perspective view of the receptacle connector  27 (A) mounted upon the printed circuit board. 
         FIG. 28(A)  is a front perspective view of the receptacle connector of  FIG. 27(A)  moved away from the printed circuit board; 
         FIG. 28(B)  is a rear perspective view of the receptacle connector of  FIG. 27(B)  moved away from the printed circuit board. 
         FIG. 29  is a front perspective view of the receptacle connector of  FIG. 28(A)  moved away from the printed circuit board without the bracket attached thereto. 
         FIG. 30(A)  is a front exploded perspective view of the receptacle connector of  FIG. 29 ; 
         FIG. 30(B)  is a rear exploded perspective view of the receptacle connector of  FIG. 28(B) . 
         FIG. 31(A)  is a front partially exploded perspective view of the receptacle connector of  FIG. 30(A) ; 
         FIG. 31(B)  is a rear partially exploded perspective view of the receptacle connector of  FIG. 30(B) . 
         FIG. 32  (A) is a front partially exploded perspective view of the receptacle connector of  FIG. 31(A) ; 
         FIG. 32(B)  is a rear partially exploded perspective view of the receptacle connector of  FIG. 31(A) . 
         FIG. 33  is a cross-sectional view of the receptacle connector of  FIG. 27(A)  mounted upon the printed circuit board. 
         FIG. 34(A)  is a front exploded perspective view of a fifth embodiment of the plug connector, similar to what is shown in  FIG. 13(A) . 
         FIG. 34(B)  is a rear exploded perspective view of the plug connector, of  FIG. 34(B) . 
         FIG. 35(A)  is a front partially exploded perspective view of a plug connector of a fifth embodiment of this present invention similar to  FIG. 34(A) . 
         FIG. 35(B)  is a rear partially exploded perspective view of the plug connector of  FIG. 34(B) . 
         FIG. 36  is a front assembled perspective view of the plug connector further assembled with cabled and other parts. 
         FIG. 37(A)  is a front partially assembled perspective view of the plug connector of  FIG. 36 . 
         FIG. 37(B)  is a rear partially assembled perspective view of the plug connector of  FIG. 36 . 
         FIG. 38  is a cross-sectional view of the assembled plug connector. 
         FIG. 39(A)  is a front exploded perspective view of a sixth embodiment of the plug connector, similar to what is shown in  FIG. 13(A) . 
         FIG. 39(B)  is a rear exploded perspective view of the plug connector of  FIG. 39(A) . 
         FIG. 40(A)  is a front partially assembled perspective view of the plug connector of  FIG. 39(A) . 
         FIG. 40(B)  is a rear partially assembled perspective view of the plug connector of  FIG. 39(B) . 
         FIG. 41(A)  is a front exploded perspective view of the plug connector of  FIG. 40(A)  further assembled with cables and other parts. 
         FIG. 41(B)  is a rear exploded perspective view of the plug connector of  FIG. 41(A) . 
         FIG. 42  (A) is a further front partially assembled perspective view of the plug connector of  FIG. 41(A) . 
         FIG. 42(B)  is a further rear partially assembled perspective view of the plug connector of  FIG. 41(B) . 
         FIG. 43  is a cross-sectional view of the assembled plug connector of  FIG. 42(A) . 
         FIG. 44  is a rear perspective view of a seventh embodiment of the receptacle connector mounted in a case of a mobile device; 
         FIG. 45  is a rear perspective view of the receptacle connector of  FIG. 27  removed away from the case. 
         FIG. 46(A)  is a front assembled perspective view of the receptacle connector of  FIG. 44 ; 
         FIG. 46(B)  is a rear assembled perspective view of the receptacle connector of  FIG. 44 ; 
         FIG. 47  is a rear exploded perspective view of the receptacle connector of  FIG. 44 . 
         FIG. 48  is a front exploded view of the receptacle connector of  FIG. 44 . 
         FIG. 49  is a further front exploded view of the receptacle connector of  FIG. 29 . 
         FIG. 50  is a further rear exploded perspective view of the receptacle connector of  FIG. 30   
         FIG. 51  is a further front exploded perspective view of the receptacle connector of  FIG. 50 . 
         FIG. 52  is a further front exploded perspective view of the receptacle connector of  FIG. 51 . 
         FIG. 53  is a further rear exploded perspective view of the receptacle connector of  FIG. 52 . 
         FIG. 54  is a cross-sectional view of the receptacle connector of  FIG. 46(A) . 
         FIG. 55  is a cross-sectional view of the receptacle connector of  FIG. 44  in the case. 
         FIG. 56  is an illustrative side view to show how the contacts are coupled to each other during the regular plug connector is mated with the receptacle connector. 
         FIG. 57  is an illustrative side view to show the power contact of the embodiment of the plug connector mated with the contact of the receptacle connector. 
         FIG. 58  is an illustrative side view to show both the power contact and the signal contact of the plug connector of  FIG. 57  mated with the contact of the receptacle connector. 
         FIG. 59  is an illustrative side view to show how the contacting area of the power contact of the plug connector of  FIG. 57  is not affected by insertion damage during mating. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference will now be made in detail to the preferred embodiment of the present invention. 
       FIGS. 1-2 (B) show a plug connector  10  mated with a receptacle connector  50  mounted in a notch  102  of a printed circuit board  100 , of a first embodiment. Referring to  FIGS. 3-8 (B), the receptacle connector  50  includes an insulative housing  52  with a mating tongue  54  forwardly extending in a capsular mating cavity  57  of a metallic shield  56  which encloses the housing  52 . Opposite upper and lower rows of contacts  58  are disposed in the housing  52  with corresponding contacting sections  60  exposed upon opposite surfaces of the mating tongue  54  in a diagonally symmetrical arrangement mechanically and electrically so as to allow a so-called flappable insertion of the plug connector  10  thereinto. A step structure  62  is formed around a root of the mating tongue  54 . A one piece metallic EMI collar  64  includes a loop structure  66  intimately surrounding the step structure  62 . The collar  64  further includes an L-shaped extending plate  65  equipped with embossments  63  thereon and received in the recess  61  of the lower piece  72  of the housing  52  (illustrated later) for mechanically and electrically connecting to the shield  56 . 
     The housing  52  is composed of the upper piece  70  and a lower piece  72  commonly sandwiching therebetween a middle piece  74  which forms the mating tongue  54 . The upper row contacts  58  are associated with the upper piece  70 , the lower row contacts  58  associated with a lower piece  72  and the shielding plate  76  is associated with the middle piece  74  via an insert molding process wherein the contacting sections  60  of the upper row contacts  58  and those of the lower rows contacts  58  are seated upon opposite upper surface and lower surface of the mating tongue  54 , respectively, as mentioned before. A rear portion of the step structure  62  is removed to have a front edge region  71  of the upper piece  70  and the front edge region  73  of the lower piece  72  sandwiched between the middle piece  74  and the loop structure  66  of the EMI collar  64  so as to enhance the strength during mating under some bending. In this embodiment, the shielding plate  76  defines an opening  77  and a thinner area  78  for both securing and impedance consideration, and further a pair of mounting legs  79  so as to efficiently separate the upper row contacts  58  and the lower row contacts  58  from each other wherein the upper row contacts  58  form the surface mount type tail sections while the lower row contacts  58  form the through hole type tail sections. In an alternate embodiment, the thinner area  78  may be totally removed from the shielding plate  76 . The lower piece  72  includes a pair of mounting posts  80  receiving in the corresponding through hole for mounting the housing  52  to the printed circuit board  100 . The lower piece  72  further forms a pair of recessions  49  to receive the corresponding retention tangs  37  of the shield  56 . 
     In this embodiment, the middle piece  74  forms a pair of recesses  82  to respectively receive the corresponding protrusions  84  of the upper piece  70  and the lower piece  72  for securing the upper piece  70 , the lower piece  72  and the middle piece  74  therebetween in a stacked manner wherein the upper piece  70  further include a pair of downward assembling poles  84  received in the corresponding alignment holes  86  of the middle piece  74 , and the lower piece  72  further includes an upward assembling pole  85  received in the corresponding alignment holes  86  of the middle piece  74 , and the lower piece  72  further forms a pair of upward locating posts  87  received within the corresponding recesses  89  in the upper piece  70 . In this embodiment, the lower piece  72  defines a plurality of through holes  91  and  93  to receive the tail sections of the lower row contacts  58  and the mounting legs  79  of the shielding plate  76  to extend therethough as an alignment spacer. Notably, the shielding plate  76  forms a front edge section  69  extending forwardly beyond a front edge of the mating tongue  54  for anti-mismsting consideration, and a pair of lateral edge sections  67  for locking with a latch  39  of the plug connector  10  (illustrated later). In brief, the shielding plate  76  is essentially multifunctional to perform shielding, grounding, reinforcing, anti-mis-mating and locking. A metallic bracket  95  is soldered under the shield  56  and forms a pair of supporting legs  97  mounted into the through hole  103  of the printed circuit board  100  for supporting the receptacle connector  50  within the notch  102  of the printed circuit board  100 . The shield  56  further includes an upside-down U-shaped structure (not labeled) on a rear portion covering the rear portion of the housing  52  with a pair of mounting legs  55  received in the through holes  104  for mounting to the printed circuit board  100  and a pair of locking tabs  59  received in the recesses  99  of the upper piece  70  after the shield  56  is rearwardly assembled to the housing  52  in a front-to-back direction. Notably, the mounting leg  79  of the shielding plate  76  share the same through hole with the neighboring grounding contact tail for enhancing grounding effect. 
     Referring to  FIGS. 9-13 (B) and further  FIG. 14 , the plug connector  10  includes an insulative housing  12  having a capsular front contour with a rectangular receiving cavity  14  therein and enclosed in a metallic shell  16 . Opposite upper and lower rows of contacts  18  are disposed in the corresponding passageways  32  of the housing with corresponding contacting sections  20  extending into the receiving cavity  14  wherein the upper and lower rows of contacts  18  are diagonally symmetrically arranged with each other in both electrical and mechanical arrangement so as to meet the so-called flappable mating, i.e., the dual opposite orientations. A pair of metallic upper and lower EMI (Electro-Magnetic Interference) spring plates  22  are enclosed in the shell  16 , and each of the EMI spring plates  22  is sandwiched between the shell  16  and the housing  12  and includes a front resilient region  24  extending inwardly toward the receiving cavity  14  and in front of the contacting sections  20 , a rear abutting region  26  to abut against the shell  16 , and a pair of side retention regions  28  retainably engaged within corresponding side portions of the housing  12 . A pair of tapes  30  are disposed upon two opposite sides of the housing  12  so as to isolate the contacting section  20  from the shell  16 . A spacer  34  is located behind the housing and defines a plurality of passages  35  through which the tail sections  21  of the contacts  18  rearwardly extend. A recessed region  36  is formed in a rear face of the spacer  34  to receive a front edge region of a paddle card  38  wherein the tail sections  21  of the contacts  18  extending through the corresponding passages  35 , are soldered upon the corresponding pads  37 . The spacer  34  forms a forward extending blade  31  with a pair of forward protrusions  33  on two faces in the vertical direction to be commonly inserted into a back side of the housing  12  wherein the blade  31  is essentially received in the side slots  13  of the housing  12 . A U-shaped metallic latch  39  of a blanking type received in the side slots  13  of the housing  12  with a pair of locking heads  40  extending into the two opposite lateral sides of the receiving cavity  14  to lock with the lateral edge sections  67  of the shielding plate  76  of the receptacle connector  50  during mating. Understandably, the latch  39  is restrained by the blade  31 , the comb structures on the bland  31 , the forward protrusions  33 , the slots  13  and an interior rear face of the housing  12 . 
     A cable  41  behind the paddle card  38 , encloses a plurality of wires  42  regulated by a pair of organizer  43  to be soldered upon a rear region of the paddle card  38 . Via the protrusions and openings (not labeled), an auxiliary rear shell  17  grasps the shell  16  to shield the paddle card  38 , and a clipper  44  grasps the rear shell  17  and further the cable  41  behind the paddle card  38 . Opposite front overcoat  45  and rear overcoat or strain relief  46  are overmolded upon the rear shell  17  and the clipper  44 , respectively. Finally, a cover  47  essentially fully covers the clipper  44 , the front overcoat  45  and the rear overcoat  46 . During mating, the mating tongue  54  is received in the receiving cavity  14  with the corresponding contacting sections  60  of the contacts  58  of the receptacle connector  50  connected to the contacting sections  20  of the contacts  18  of the plug connector  10  wherein the latch  39  is locked with the shielding plate  76 , and the front resilient region  24  of the spring plate  22  contacts the collar  64 . 
     Referring to  FIGS. 15(A) - 20  showing a second embodiment of the receptacle connector  110  similar to that disclosed in the first embodiment, the receptacle connector  110  includes the upper piece  112  with the upper contacts  114  insert molded therein, the middle piece  116  with the shielding plate  118  therein, and the lower piece  120  with the lower contacts  122  therein wherein the upper piece  112  and the lower piece  120  are commonly sandwich the middle piece  116  therebetween with an EMI metallic collar  124  surrounds all. A metallic shield  126 , i.e., i.e., the capsular segment  126   a  (labeled in  FIG. 17(A) ) defined as the mating port portion encloses the assembled upper piece  112 , the middle piece  116  and lower piece  120  and forms a mating cavity  127  in which a mating tongue  129  formed by the middle piece  116  forwardly extends. Notably, similar to that in the first embodiment, the shielding plate  118  forms a pair of lateral edge sections  119  for locking to the corresponding latch of the complementary plug connector. Also, similar to that in the first embodiment, the metallic shield  126  further forms an upside-down U-shaped structure, i.e., the rear covering portion  130   a  (labeled in  FIG. 16(A) ) including a top wall  130 , a pair of side walls  132  and further a rear wall  134  so as to relatively completely shield the rear portions of the upper piece  112  and lower piece  120  above the printed circuit board  106 . Different from what is disclosed in the first embodiment, the mating port portion  126   a  of the shield  126  does not defines a sealed type capsular mating cavity  127  but with two pairs of spring tangs  128  for engagement with the mated plug connector. In addition, a metallic top bracket  138  covering an upper part of the capsular segment  126   a  of the shield  126 , is optionally welded to the shield  126  and mounted upon the top surface of the printed circuit board  106  via a pair of mounting legs  139 , and a metallic bottom bracket  140  covering a lower part of the capsular segment  126   a  of the shield  126 , is optionally welded to the shield  126  and optionally soldered, with the soldering pads  142 , to an under surface of the printed circuit board  106  to completely shield the through holes  108  which receive the mounting tails of the lower contacts  122  and those of the shield  126 . The bottom bracket  140  as shown in  FIG. 16(A)  and  FIG. 16(B)  includes a bottom wall  140   a  and a rear wall  141  bending from a rear edge of the bottom wall  140   a , and two front sidewalls  143  and two rear sidewall  145  curvedly extending from opposite ends of the bottom wall  140   a . The front sidewalls  143  snug surrounding the capsular segment  126   a  and the rear sidewalls  145  are separated from each other. Said soldering pads  142  bend from the rear sidewall  145  and the rear wall  141 . Please referring to  FIG. 20 , the bottom wall  140   a  and the rear wall  141  surround the mounting tails  108  of the lower contacts  122  and those of the shield  126  therein. The rear wall  134  of the rear covering portion  130  surrounds the mounting legs of the upper contacts therein. In this embodiment, the lower piece  120  forms a pair of recesses  111  to receive the corresponding retention tangs  113  of the shield  126 . 
     Referring to  FIG. 21(A) - 26  showing a third embodiment of the receptacle connector similar to those disclosed in the second embodiments, a metallic bottom bracket  140 ′ covering a lower part of the capsular segment  126   a  of the shield  126 , is optionally welded to the shield  126  and positioned to an under surface of the printed circuit board  106  to completely shield the through holes  108  which receive the mounting tails of the lower contacts  122  while leaving those receiving the shield  126  opened. Notably, same with that in the first embodiment, the collar  124  is equipped with an L-shaped extending plate  125  received in the recess  121  of the lower piece  120  wherein the extending plate  125  forms a pair of protrusions  123  to mechanically and electrically connect to the shield  126 . The bottom bracket  140 ′ includes a bottom wall  140   a ′, a rear wall  141 ′ and two sidewalls  143 ′, those four walls are integrated and formed by drawing. Different from the second embodiment, the sidewalls has no soldering pads  142 , and the bottom bracket  140 ′ is formed by drawing technology. 
       FIG. 27(A) - 33  disclose fourth embodiment of the receptacle connector  500  for use with a flippable plug connector. The receptacle connector  500  mounted upon a printed circuit board  550  via assistance of the bracket  548 , includes a terminal module  502  enclosed within a metallic shield  504 . The terminal modules  502  includes an upper insulator  510  associated with the upper contacts  512 , and a lower insulator  514  associated with the lower contacts  516  to commonly sandwich a middle insulator  520  associated with an EMI metallic shielding plate  520  having a pair of lateral edge sections to engage the corresponding latches of the complementary plug connector. The significant difference relative to the first embodiment is to provide the dual row contacts both with surface mount tail sections  5122 ,  5162  and surface mount tail sections  5202  of the shielding plate  520  rather than including through hole type tail sections. Under this situation, no RFI leakage can be formed through such an inexistent vias in which the original through hole tail sections extend. Understandably, to have two rows of surface mount type tail sections, the tail sections of the upper row contacts and those of the lower row contacts should be offset from each other for easy inspection and trace routing. Another primary difference relative to the first embodiment is to provide the bracket  548  soldered upon the shield  504  with additionally a pair of raised portions  546  at two rear corners where the corresponding portions of the terminal module  502  are originally exposed outside of the plate, i.e., rear covering portion  505  of the shield  504 . In this embodiment, such an originally exposed portion of the upper insulator  510  is the front/corner portion of the horizontal portion behind the capsular portion where the gap  506  is located. Therefore, via the pair of block like raised portion  546  of the bracket  548 , majority of gaps is sealed to reduce RFI leakage. The raised portion  546  includes a first segment  5461  extending in a front and rear direction and transverse direction, a second segment  5462  extending in the front and rear direction and a vertical direction and a third segment  5463  bending from the second segment  5462  and extending in the transverse direction and the vertical direction. The raised portion  546  shielding a gap  506  formed between the shielding  504  and the covering portion  505 . Thus, the bracket  548  performs a significant RFI leakage reduction function in addition to the hold down function. Notably, the raised portion  546  is not intimately seated upon the corresponding shield  504  or housing  502  but with a space therebetween in this embodiment for manufacturing consideration. On the other hand, similar to the first embodiment, the bracket  548  includes a pair of mounting legs  544  inserted into the printed circuit board  550 . 
       FIG. 34(A) - 38  disclose a fifth embodiment of the flippable plug connector  300  similar to the plug connector  50  disclosed in the first embodiment. The plug connector  300  includes an insulative housing  302  forming a receiving cavity  304 . Two rows of contacts  306  are assembled within the housing  302  with the front contacting sections extending into the receiving cavity  304  and a rear connecting sections soldered upon a front region of a paddle card  308  which is located behind the housing  302 . A cable  310  includes a plurality of wires  312  soldered upon a rear region of the paddle card  308 . A metallic shell  314  encloses the housing  302 . A pair of metallic spring plates  316  are assembled to the housing  302  and sandwiched between the housing  203  and the shell  314 . The primary difference relative to the first embodiment is to provide a pair of discrete latches  318 , in place of a single U-shaped latch piece disclosed in the first embodiment, retained within two opposite slots  320  of the housing  302  via the barbs  322 , wherein a front section  324  of the latch  318  extends into the receiving cavity  304  and the rear section  326  defining a fork structure to sandwich a front edge region of the paddle card  308  in a soldered manner. Understandably, this arrangement may allow a relatively larger tolerance during manufacturing advantageously. 
       FIG. 39(A) - 43  disclose a sixth embodiment of the flippable plug connector  400 . The plug connector  400  includes an insulative housing  402  forming a receiving cavity  404 . Two rows of contacts  406  are assembled within the housing  402  with the front contacting sections extending into the receiving cavity  404  and rear connecting sections regulated by a spacer  408  to reach a front region of the paddle card  410 . A U-shaped latch  412  is retained in the housing  402  in front of the spacer  408  with front sections extending into the receiving cavity  404 . A metallic shell  414  encloses the housing  402 . A cable  416  includes a plurality of wires  418  soldered to a rear region of the paddle card  410 . The primary difference relative to the first embodiment, is to provide the spring plate  420  without the retention tab  28  disclosed in the first embodiment but forming an engagement notch  422  to receive a protrusion  426  on the housing  402  so as not to lessen the housing material for strength consideration. On the other hand, the 0.05 mm tape  30  disclosed in the first embodiment, has been replaced with the 0.1 mm plastic plate  430 . Additionally, the front contacting section  428  is structured with a bellow shape instead of a cantilevered type so as to leave a sufficient distance with regard to the contacting sections of the contacts for not shorting therebetween. The front contacting sections  428  are disposed in front the contacting sections of the contacts through corresponding holes  427  defined on the insulative housing, the through holes  427  are distinct from each other. 
     Referring to  FIGS. 44-55  showing a seventh embodiment of a receptacle connector  200 , the receptacle connector  200  is essentially a power only type of less contacts thereof. The receptacle connector  200  includes a terminal module  202  enclosed in a housing  204 . Understandably, in this embodiment the housing  204  is insulative. Anyhow, the housing  204  may be metallic via a die casting method or a metallic drawing piece associated with an overmolded insulator. The terminal module  202  is essentially composed of the upper insulator  206  with the upper contacts  208  insert-molded therein, the lower insulator  210  with the lower contacts  212  insert-molded therein, and the middle insulator  214  with the shielding plate  216  insert-molded therein, wherein the middle insulator  214  forming the mating tongue thereof, is sandwiched between the upper insulator  206  and the lower insulator  210  with the securing sections  218  secured into the corresponding retention slots  220  in the upper insulator  206  and those in the lower insulator  210 . The tails of the upper contacts  208  and the lower contacts  212  are of a compression mount for reliable and replaceable connection to the printed circuit board  250 . A metallic collar  222  surrounds the terminal module  202 . The shielding plate  216  forms a pair of lateral edge sections  217  exposed outside of the mating tongue to be engaged with a pair of latching structures of the mated plug connector (not shown). The housing  204  forms a front capsular mating cavity  230  and a rear rectangular receiving cavity  232  communicate with each other along the front-to-back direction to commonly receive the terminal module  202  therein. The housing  204  forms transverse retention plate  234  on an exterior side for reception within the corresponding retention grooves  260  in the receiving space  262  of the case  266  of a mobile device  255 , and a pair of retention lugs  236  for reception within the corresponding retention recesses  264  so as to have the connector  200  assembled securely within the corresponding receiving space  262  of the mobile device  255 . The housing  204  further forms a pair of securing lugs  238  received in the corresponding recessions  240  to secure the terminal module  202  within the receiving cavity  232  of the housing  204 . The housing  202  forms an upward opening  242  to allow the tails of the upper contacts  208  and the lower contacts  214  to extend therethrough upwardly to contact the printed circuit board  250 . The case  266  forms a through opening  268  to communicate the receiving space  262  with an exterior. A pair of supporting ribs  269  are formed in the receiving space  262  to support the connector  200 . Two pairs of press fit ribs (not labeled) and each pair being by two sides of the retention recess  264 , are formed on the side walls facing the receiving space  262  to press against the inserted connector  200  for retention. A rubber seal  251  surrounds the front capsular portion  231  of the housing  204  and forms a shoulder  253  to abut against a front edge of the front capsular portion  231  in a compressed manner, along the front-to-back direction, when the connector  200  is assembled in the receiving space  262 . Under this arrangement, the connector  200  is first downwardly assembled into the receiving space  262  and the printed circuit board  250  is successively assembled thereto to have the tails of the upper contacts  208  and the lower contacts  212  to mechanically and electrically connect thereto in a compressing manner. Understandably, compared with other previous embodiments, the connector  200  has less contacts which only perform power delivery. Anyhow, the additional signal contacts are optionally provided in the same connector, if desired. Additionally, similar to the previous embodiment, the plug connector is flippable with regard to the receptacle connector  200 . 
     Referring to  FIG. 56  the deflectable power contact  600  of the plug connector forms an angled contacting area  602 , the blacken area on the angled contacting area  602  means the arc damaged region during breaking, and position “A” of the flat power contact  700  of the receptacle connector shows the breaking point and position “B” thereof shows the contacting point when mated with the same one power contact  600  of the plug connector. Notably, in the receptacle connector, the signal contact  702  has a more rearward breaking point than the power contact  700 . Clearly, the contacting area  602  includes the arc damaged region, thus making the connection inferior.  FIG. 57  shows the power contact  610  moves between the initial/breaking position where the breaking point  612  contacts the power contact  700  of the receptacle connector, to the full/contact position where the contacting point  614  contacts the power contact  700  of the receptacle connector. In this embodiment the breaking point  612  and the contacting point  614  is distance from each other with around 0.75 mm optionally along an oblique extending line.  FIG. 58  shows the signal contact  620  still has the same original angled contacting section which is spaced from the contacting point with 0.5 mm in a side view.  FIG. 59  shows in the power contact of the plug connector how the arc damaged area is avoided in the contacting point due to such an obliquely extending line. Understandably, the arc damage essentially occurs around the last breaking piece so only the power contact is involved therewith for this improvement. 
     However, the disclosure is illustrative only, changes may be made in detail, especially in matter of shape, size, and arrangement of parts within the principles of the invention.