Abstract:
An electrical card connector assembly ( 100 ) comprising: a first electrical card connector ( 1 ); a second electrical card connector ( 2 ) disposed below the first electrical card connector; a third electrical card connector ( 3 ); a fourth electrical card connector ( 4 ) arranged abreast with the third electrical card connector; a PCB ( 5 ) defining an upper surface ( 50 ) and a lower surface ( 51 ), the upper and lower surface having a plurality of traces, respectively; wherein the combined first and second card connector are disposed on the upper surface ( 50 ) of the PCB and electrically connected with the corresponding traces of the upper surface, and the third and fourth electrical card connector are arranged abreast on the lower surface of the PCB ( 5 ) and electrically connecting with the corresponding traces of the lower surface ( 51 ).

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to an electrical card connector assembly, and in particular to an electrical card connector assembly mounted to a printed circuit board. 
   2. Description of Prior Arts 
   the flash memory has a lot of advanced features, for example, strong computing function, faster storage and high scalability. And as the flash memory appears, it is deep loved by the most consumers immediately, because of said advanced characteristics. The SD card, MS card, CF card, XD card etc. are derivates of the flash memory. Currently, said cards are broadly used in electrical products like the digital camera, cellphone etc. as a memory storage. And every kind of card needs a special card connector to receive, usually, the electrical device needs to be mounted many kinds of electrical card connector to receive the different cards. The electrical device has to increase working procedures to install the electrical card connectors, and define many traces to correspond the electrical card connectors. The cost of the electrical device will increase, and the electrical device will lose the market by reason of the high cost. 
   Therefore, it is desirable to provide an electrical card connector assembly that eliminates the aforesaid problems. 
   SUMMARY OF THE INVENTION 
   Accordingly, an object of the present invention is to provide an electrical card connector assembly which saves assembly procedures and easy to assemble. 
   In the exemplary embodiment of the invention, an electrical card connector assembly comprising: a first electrical card connector; a second electrical card connector disposed below the first electrical card connector, the first and second electrical card connectors being arranged in a stack; a third electrical card connector; a fourth electrical card connector arranged abreast with the third electrical card connector; a PCB defining an upper surface and a lower surface, the upper and lower surfaces having a plurality of traces, respectively; wherein said combined first and second electrical card connectors are disposed on the upper surface of the PCB and electrically connected with the corresponding traces of the upper surface, and the third and fourth electrical card connectors are arranged abreast on the lower surface of the PCB and electrically connecting with the corresponding traces of the lower surface. 
   Other objects, 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 DRAWING 
       FIG. 1  is a perspective view of an electrical card connector assembly in accordance with the present invention; 
       FIG. 2  is a partly exploded view of the electrical card connector; 
       FIG. 3  is a perspective view of the first ejector; 
       FIG. 4  is a perspective view of the electrical card connector assembly, as viewed from the other side according to the  FIG. 1 ; 
       FIG. 5  is a partly exploded view of the electrical card connector according to the  FIG. 4 ; 
       FIG. 6  is an exploded view of the third electrical card connector. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Referring to  FIGS. 1 and 5 , an electrical card connector assembly  100  comprises a PCB (Printed Circuit Board)  5 , electrical card connectors and a connector  6  mounted on the PCB  5  and a stand off  7 . The electrical card connector assembly  100  defines a card insertion direction A, an upright direction B and a transverse direction C, the direction A, direction B and direction C are perpendicular to each other. Said card connectors includes a first card connector  1 , a second card connector  2 , a third card connector  3  and a fourth card connector  4 . The PCB  5  has a upper surface  50  and a lower surface  51 , the first and second card connectors  1 ,  2  are mounted on the upper surface  50  of the PCB  5  stacked up along the upright direction B. The second card connector  2  is below the first card connector  1 , and mounted on the PCB  5  directly. The third and fourth card connectors  3 ,  4  are mounted on the lower surface  51  of the PCB  5  side by side along the transverse direction C. 
   Referring to  FIG. 1 to 3 , the first card connector  1  is configured of L-shape and comprises a first shell  11 , a first insulative housing  13 , a plurality of first terminals  14 , a first ejector  12  and a guider  15 . The first shell  11  defines a forward section (not labeled) and rearward section (not labeled), the first insulative housing  13  is assembled on the rearward section. The shell  11  and the first insulative housing  13  constitute a first card receiving space  10 . The first insulative housing  13  has a rectangular base  130 , a pair of extending arms  131  extended from the opposite sides of the base  130  along the card insertion direction A and a mating portion  132  extended from the base  130  between said pair of extending arms  131 . The first plurality of terminals  14  are received in the base  130  and mating portion  132 . The first shell  11  comprises an upper side  110  and lateral sides  111  extending form the upper side  110 , the lateral sides  111  define a plurality of locking holes  112  adjacent to the forward section. Said guider  12  is configured of triangle disposed on a lateral side of the first card receiving space  10  to guide the electrical cards with different width insert into the first card receiving space  10 . The first ejector  12  is assembled to the lateral side of the first shell  11  opposite to the guider  15 . The first ejector  12  includes an ejection portion  123  inserting into the first card receiving space  10 , a driving rod  121  connecting to the ejection portion  123 , a cam follower  122 , a spring  120  and an insulative block  124 , the insulative block  124  forms a heart-shape groove (not shown), one point of the cam follower  122  slides in the heart-shape groove and the other point is rotatablely connected to the driving rod  121 . So the driving rod  121  can be stick in a first position and a second position circularly to eject the electrical card from the first card receiving space  10 . 
   The second card connector  2  is below the first card connector  1  and includes a second shell  21  and a terminal model  22 . The shell  21  defines a second card receiving space  20 , the terminal model  22  has a plurality of second terminals  23  arranged in two rows along the transverse direction C, and the plurality of second terminals  23  soldering to the PCB  5  directly. The opposite sides of the second shell  21  define a plurality of protrude portions  210  corresponding to the plurality of locking holes  112 . 
   Referring to  FIG. 4 to 6 , the third card connector  3  is a N-in-1 card connector, the third card connector  3  includes a third shell  31 , terminal board  32 , insulative flame  34  and the third ejector  36 . The insulative flame  34  involves a pair of lateral side wall  341  and a rear side wall  340 , a plurality of third terminals  35  are received in the rear side wall  340 . The terminal board  32  includes a plurality of assistant terminals  33 , the plurality of assistant terminals  33  comprise a first assembly portion  330 , a second assembly portion  332 , a contacting portion  331  and a soldering portion  333  extending from the second assembly portion  332 . The first assembly portion  330  and the second assembly portion  332  are assembled in the terminal board  32 . The third shell  31  and the insulative flame  34  constitute the third card receiving space  30 , and the top side wall of the third shell  31  defines a pair of retaining pins  310  protrude into the third card receiving space  30 . A pair of retaining notches are formed on the forward edge of the terminal board  32  corresponding to said retaining pin  310  of the third shell  31 , so the terminal board  32  can fix on the third shell  31  by the retaining pin  310  inserting into the retaining notches  320 . The terminal board  32  defines a plurality of perforations  321  adjacent to the retaining notches  320 , the contacting portions  331  of the assistant terminals  33  extend into the third card receiving space through said perforations  321 . The third ejector  36  is disposed on one of the lateral side wall  341  to eject the different electrical cards from the third card receiving space  30 . 
   The fourth card connector  4  comprises a fourth shell  41 , a fourth insulative housing  42  and a fourth ejector  44 . The fourth insulative housing  42  includes a fourth lateral side wall  422  and a fourth rearward side wall  421 , a plurality of fourth terminals  43  are received in the fourth rearward side wall  421 , and the fourth shell  41  covers on the fourth insulative housing  42 , a fourth card receiving space  40  is constructed between the fourth shell  41  and the fourth insulative housing  42 . The plurality of fourth terminals  43  cantilever in the fourth card receiving space  40 . The fourth ejector  44  is disposed on the fourth side wall  422  of the fourth insulative housing  42 . When the electrical card inserts into the fourth card receiving space  40 , the electrical card is guided by the fourth side wall  422  and the one of the lateral sides (not labeled) of the fourth shell  41 . 
   In the present invention, the tails of the first, second, third and fourth terminals  14 ,  23 ,  35 ,  43  are soldering to the PCB  5 , the PCB  5  defines a plurality of traces (not shown) to electrically connect to said tails of the first, second, third and fourth terminals  14 ,  23 ,  35 ,  43 . The BTB connector electrically connect to the first, second, third and fourth terminals  14 , 23 , 35 , 43  via the traces of the PCB  5 . 
   The first, second, third and fourth card connectors  1 ,  2 ,  3 ,  4  are all soldered to the PCB  5 , the PCB  5  is a integrated PCB. The number of electrical card connectors referring to said electrical card connector assembly of the present invention can be more than four or less than four. In a word, the different kinds of electrical card connectors are arranged on the integrated PCB  5 , and then electrically connect to an other electrical device through the BTB connector  6 . So, the electrical device just needs to prepare a mating connector to receive said BTB connector  6 , the working procedures of the electrical device will be decreased. 
   It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.