Abstract:
A memory card includes a first memory unit and the second memory unit. The first memory unit and the second memory unit are detachably connected together and are capable of storing and transmitting data, and are capable of working independently. A memory card holding structure using the memory card is also described. The first memory unit and the second memory unit are detachably incorporated together and electrically connected to the connector. Thus, each memory unit can be respectively detached and replaced, which does not affect normal operation of other memory unit. Moreover, the memory cards have two or more memory chip card functions.

Description:
BACKGROUND 
       [0001]    1. Technical field 
         [0002]    The disclosure generally relates to memory cards, and more particularly, relates to a detachable memory card and a related memory card holding structure. 
         [0003]    2. Description of the Related Art 
         [0004]    Generally, memory cards, such as subscriber identity module (SIM) cards and trans flash (TF) cards, are widely used with personal digital assistants (PDAs), mobile phones or other electronic devices. Each memory card needs a connector to electrically connect with the electronic devices. 
         [0005]    However, varied connectors applied to the electronic device need to arrange corresponding connector circuits on a circuit board, which may increase the size of the circuit board. Moreover, different connectors need to arrange corresponding connector grooves in a housing, which may decrease structural strength of the housing. 
         [0006]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    Many aspects of an exemplary memory card and a memory card holding structure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the exemplary memory card and the memory card holding structure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of an embodiment. 
           [0008]      FIG. 1  is an exploded view of a memory card holding structure including a memory card and a connector, according to an exemplary embodiment. 
           [0009]      FIG. 2  is similar to  FIG. 1 , but viewed from another aspect. 
           [0010]      FIG. 3  is an assembled view of the memory card holding structure shown in  FIG. 1 . 
           [0011]      FIG. 4  is similar to  FIG. 3 , but shown from another aspect. 
       
    
    
     DETAILED DESCRIPTION 
       [0012]      FIGS. 1 and 2  show an exemplary embodiment of a memory card holding structure  100  used with an electronic device. The memory card holding structure  100  includes a memory card  200  and a connector  300  for receiving the memory card  200 . The connector  300  is removably mounted within and electrically connected to the electronic device. The memory card  200  is electrically connected to the electronic device through the connector  300 . The memory card  200  includes a first memory unit  2  and a second memory unit  4 . The first memory unit  2  and the second memory unit  4  are detachably assembled as a whole, so any of them can be easily removed or replaced. 
         [0013]    The first memory unit  2  can be a normal SIM card and includes a first base body  22 , a first memory chip  24 , and a plurality of pins  26 . The first base body  22  is a substantially rectangular sheet and can be made of plastics or other insulating materials. The first base body  22  defines two openings  27  at the same end of the first base body  22  and is opened at the corner of the first base body  22 . The angle of each opening  27  is less than 90 degree; therefore a locking section  28  is formed at an end of the first base body  22 . The locking section  28  is a substantially isosceles trapezoid sheet. 
         [0014]    The first memory chip  24  can be detachably mounted within the first base body  22  and is capable of storing information such as telephone numbers, messages or other information data. The pins  26  are mounted on and electrically connected to the first memory chip  24 . The pins  26  are electrically connected to a circuit board of the electronic device through the connector  300 . The first memory unit  2  is electrically connected to the electronic device to transmit and receive different information data. 
         [0015]    The second memory unit  4  can be a normal TF card and includes a second base body  42 , a second memory chip  44 , and a plurality of pins  46 . The second base body  42  is a substantially rectangular sheet and may be made from plastics or other insulating materials. The second base body  42  defines a locking opening  48  with a shape substantially matching with the shape of the locking section  28 . The locking section  28  is detachably received within the locking opening  48 , accordingly the first memory unit  2  can be detachably assembled to the second memory unit  4  together. 
         [0016]    The second memory chip  44  can be detachably mounted within the second base body  42  and is capable of storing information such as images, audio, games or other information data. The pins  46  are mounted on and electrically connected to the second memory chip  44 . The pins  46  are electrically connected to the circuit board of the electronic device through the connector  300 , therefore the second memory unit  4  is electrically connected to the electronic device to transmit and receive different information data without the interferences of the first memory unit  2 . 
         [0017]    The connector  300  includes a main body  50 , a sidewall  52 , two end walls  54 , and two resisting sections  56 . The main body  50  is a substantially rectangular sheet and defines a first groove  501  and a second groove  503 . The shape and the size of the first groove  501  is substantially same with the first memory unit  2 . The shape and the size of the second groove  503  are substantially same with the second memory unit  4 . Thus, the first memory unit  2  and the second memory unit  4  can be partially or fully received within the first groove  501  and the second groove  503 , respectively. Elastic sections  505  are mounted on the bottom of the first groove  501  and the second groove  503 . The elastic sections  505  are made from copper, stainless steel or other metal and are electrically connected to the circuit board of the electronic device. 
         [0018]    When the first memory unit  2  and the second memory unit  4  are together they are received within the connector  300 . The elastic sections  505  elastically resist against and electrically connect the pins  26  and the pins  46  to establish electrical connections between the memory card  200  and the electronic device. The main body  50  may have fourteen elastic sections  505 , six elastic sections  505  are mounted in the first groove  501 , and others are mounted in the second groove  503 . 
         [0019]    The two end walls  54  are perpendicularly connected to opposite ends of both sidewalls  52 , and the end walls  54  are perpendicular to the surface of the main body  50 . The resisting sections  56  are perpendicularly connected to the corresponding end walls  54  and are parallel to the main body  50 , resulting in forming a receiving space  57 . The distance between the resisting sections  56  and the main body  50  is substantially equal to or larger than the thickness of the first memory unit  2  and the second memory unit  4 . The receiving space  57  is capable of receiving the memory card  200  or other chip cards with an identical shape and size as the memory card  200 . 
         [0020]    Referring further to  FIGS. 3 and 4 , to assemble the memory card  200  to the connector  300 , the locking section  28  is aligned with and is received within the locking opening  48  of the second memory unit  4 , accordingly, the first memory unit  2  and the second memory unit  4  are separably connected. The first memory chip  24  and the second memory chip  44  are aligned with the first groove  501  and the second groove  503 , respectively. The first memory unit  2  and the second memory unit  4  are incorporated and are inserted within the receiving space  57 . The first memory unit  2  and the second memory unit  4  resist against the two resisting sections  56 , and are partially expose from the receiving space  57 . The elastic sections  505  of the first groove  501  elastically resist against and electrically connect the pins  26 , and the elastic sections  505  of the second groove  503  elastically resist against and the electrically connect the pins  46  of the second memory unit  4 . Thus, the memory card  200  is received within the connector  300  and is electrically connected to the electronic device. 
         [0021]    To remove the first memory unit  2  or the second memory unit  4  from the connector  300 , the first memory unit  2  is detached relative to the second memory unit  4 . If one of the first memory unit  2  or the second memory unit  4  is removed from the receiving space  57 , the memory unit within the receiving space  57  is held against the resisting section  56  and maintains a normal operational state. For example, when the first memory unit  2  is removed from the receiving space  57 , the second memory unit  4  remains within the receiving space  57  and is held between the resisting section  56  and the bottom of the main body  50  (in the resisting section  56 ). Since the first memory unit  2  and the second memory unit  4  are electrically connected to different circuits, the second memory unit  4  maintains normal operation. 
         [0022]    In addition, both the first memory chip  24  and the second memory chip  44  have ground pins. The ground pins of both the first memory chip  24  and the memory chip  44  can share with a same ground port to electrically connect to the circuit board. The first memory unit  2  can be compatible with the second memory unit  4 , and the first memory chip  24  and the second memory chip  44  maintain the original size and pin arrangement. 
         [0023]    Alternatively, the first memory unit  2  and the second memory unit  4  can be further connected by a shaft (not shown). The first memory unit  2  and the second unit  4  define through holes, respectively, and the shaft is passed through the through holes. The first memory unit  2  is rotatably and detachably connected relative to the second memory unit  4 . Thus, the first memory unit  2  can be detached from the second memory unit  4  if removing the shaft from the through holes. 
         [0024]    Alternatively, the memory card  200  can further include memory units detachably connected. Accordingly, the connector  300  can further define a plurality of grooves for receiving the memory units, and each memory chip corresponds to elastic sections  505 . Alternatively, the grooves can be omitted, and the elastic sections  505  are directly positioned on the surface of the main body  50  of the connector  300 . 
         [0025]    It is to be understood, however, that even though numerous characteristics and advantages of the exemplary disclosure have been set forth in the foregoing description, together with details of the structure and function of the exemplary disclosure, 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 exemplary disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.