Abstract:
An electrical card connector for receiving a card, comprises an insulative housing having a supporting surface with a front end and a rear end; a plurality of contacts assembled in the housing and oriented toward the rear end; a switch terminal arranged in the rear end. Each contact has at least a contact engaging portion extending above the supporting surface; one of the contact engaging portions engaged with the switch terminal when a card is inserted, and electrically separated from each other when the card is removed.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to an electrical card connector, and particularly to an electrical card connector used with detecting function. 
         [0003]    2. Description of the Prior Art 
         [0004]    IC (integrated circuit) cards are known in the art and contain artificial intelligence in the form of a memory circuit or other electronic program. A card reader is used to read the information or retrieve the memory stored on the card. IC cards are used in countless applications today, including video cameras, smart-phones, music players, ATMs, cable television decoders, toys, games, pc adapters and other electronic applications. 
         [0005]    A typical card connector is described in China Patent CN 2854856 Y, hereinafter referred to as the &#39;856 patent. The card connector disclosed in this issue connection, The &#39;856 patent discloses a card connector body comprising an insulating housing with a receiving slot for receiving a card, a plurality of contacts mounted on the housing, a pair of switch contacts mounted on one side of the housing and protruding to the receiving slot, and a metal shell for covering the housing. The switch contacts separate from each other without a card inserted into the receiving slot, and contact with each other when a card inserted into the slot and one side thereof pushing one switch contact touch with the other for noticing that a card is inserted. 
         [0006]    However, at least one problem of above said card connector is that the switch comprises two switch contacts mounted on one side of the housing, the processes of the switch contacts manufacture and assembly increase the production cost of the connector; and further the size of the connector increases obviously, so such connector would not be in accord with the miniaturization trend of the electrical device. 
         [0007]    Hence, an improved electrical card connector is desired to overcome the disadvantages of the prior art. 
       BRIEF SUMMARY OF THE INVENTION 
       [0008]    Therefore, a main object of the present invention is to provide an electrical card connector which could be in accord with the miniaturization trend, and reduce the production cost of the connector. 
         [0009]    To fulfill the above-mentioned object, an electrical card connector for receiving a card, comprises an insulative housing having a supporting surface with a front end and a rear end; a plurality of contacts assembled in the housing and oriented toward the rear end; a switch terminal arranged in the rear end. Each contact has at least a contact engaging portion extending above the supporting surface; one of the contact engaging portions engaged with the switch terminal when a card is inserted, and electrically separated from each other when the card is removed. 
         [0010]    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 
         [0011]    The foregoing summary, as well as the following detailed description of the embodiments of the present invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown in the drawings embodiments which are presently preferred. As should be understood, however, the invention is not limited to the precise arrangements and instrumentalities shown. In the drawings: 
           [0012]      FIG. 1  is a perspective view of an electrical connector to a first embodiment of the present invention. 
           [0013]      FIG. 2  is a perspective view of an electrical connector of  FIG. 1  without the shielding case. 
           [0014]      FIG. 3  is an exploded perspective view of an electrical connector to a second embodiment of the present invention. 
           [0015]      FIG. 4  is a perspective view of an electrical connector of  FIG. 3  without the shielding case. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0016]    Reference will now be made in detail to the preferred embodiment of the present invention. 
         [0017]    Referring to  FIGS. 1-2 , an electrical card connector according to a first embodiment of the present invention is adapted for receiving an electronic card (not shown). The electrical card connector comprises an insulating housing  1  defining a receiving room, a plurality of contacts  2  mounted in the housing  1 , a switch terminal  3  mounted on the housing  1  corresponding to one contact  2 , a ejector  4  moveably mounted in one side of the housing  1 , and a shielding case  5  covering the housing  1 . 
         [0018]    The housing  1  comprises a rear end  11  and a front end  12  having an opening  16  inserting a electronic card therefrom, the receiving room  10  extends from the opening  16  toward the rear end  11 , and the housing  1  has a footwall  13  below the receiving room  10 . 
         [0019]    Each contact  2  assembled to the corresponding passage (not shown), comprises a first contact portion  21  extending toward the rear end  11  and protruding into the receiving room  10 , for electrically connecting the corresponding contact pad (not shown) of the card inserted into the receiving room  10 . 
         [0020]    The ejector  4  mounted on one side of the receiving room  10 , comprises a slider  41  with a cam follower (not shown) on the top surface, a pin member  43  having one end moveably mounted in the cam follower and the other end fixed in a preinstall position (not shown) of the rear end  11  of the housing  1 , a spring  42  sandwiched between the slider  41  and the rear end  11  of the housing  1 , and a fastening member  44  mounted on the slider  41  and protruding into the receiving room  10 . In the process of inserting the card into the receiving room  10 , the card push the slider  41  slide toward the rear end  11 , and the spring  42  become compressed; then the card is engaging with the fastening member  44  so as to be fastened to the ejector  4 , finally, the pin member  43  is locked in a locking groove (not shown) of the cam follower and the card is at an operating position. In the process of ejecting the card out of the receiving room is: just continue to push the card toward the rear end  11 , and the end of the pin member  43  will pop out of the locking groove of the cam follower; then release the card, the compressed spring  42  push the slider  41  toward the front end  12 , accordingly, the card is pushed out of the receiving room. 
         [0021]    The shielding case  5  is approximately rectangular, and comprises a top wall  51  above the receiving room, and a pair of side walls  52  extending from the opposite side of the top wall  51  perpendicularly and downwardly. 
         [0022]    The switch terminal  3  is mounted on the rear end  11  of the housing  1 , correspond to one contact  2  to form a switch together. The switch  3  comprises an assembling portion (not shown) assembled to the rear end  11  of the housing  1 , a soldering portion  32  extending from one end of the assembling portion and protruding out of the housing, and a second contacting portion  33  extending from the other end of the assembling portion and protruding into the receiving room  10 , under the first contact portion  21  of the corresponding contact  2 . The first contact portion  21  is separate from the second contact portion  33  without a card inserted in the receiving room  10 ; and the first contact portion  21  touch the second portion  33  when a card is inserted in the receiving room  10 , so as to inform the circuit that the card is at functional mode. 
         [0023]      FIGS. 3-4  disclose a second embodiment of the present invention, the switch is separate from the first embodiment. In this embodiment, the switch comprises a switch terminal  3 ′ and one corresponding contact  2 ′. The switch terminal  3 ′ comprises an assembling portion  31 ′ assembled onto the footwall  13  and adjacent to the rear end  11  of the housing  1 , a soldering portion  32 ′ extending from one end of the assembling portion  31 ′ perpendicularly and protruding out of the rear end  11  of the housing  1 , a spring arm  34 ′ connecting to the other end of the assembling portion  31 ′ and approximately runs parallel with the assembling portion  31 ′; and a second contact portion  33 ′ extending from the free end of the spring arm  34 ′ perpendicularly and horizontally. The contact  2 ′ corresponding to the switch terminal  3 ′ comprises a mounting portion (not shown) assembled on the housing  1 , a first elastic arm  22 ′ and a second elastic arm  23 ′ extending approximately parallelly from the same end of the mounting portion, a third contact portion  24 ′ formed on the free end of the first elastic arm  22 ′ for electrically connecting the contact pad of the card, a connecting portion  25 ′ extending from the free end of the second elastic arm  23 ′ toward the first arm  22 ′, a first contacting portion  21 ′ extending from the one side of the free end of the contact portion  24 ′ toward the rear end  11  above the second contact portion  33 ′. The first contact portion  21 ′ is separate from the second contact portion  33 ′ without a card inserted into the receiving room  10 ; and the first contact portion  21 ′ touch the second contact portion  33 ′, the third contact portion  24 ′ electrically connecting the contact pad of the card when a card is inserted in the receiving room  10 , so as to inform the circuit that the card is at functional mode. 
         [0024]    In the present invention, the switch  3 ,  3 ′ and the corresponding contact  2 ,  2 ′ together to form a detect switch. Compare to the related arts, the connector of the present invention could be in accord with the miniaturization trend, and reduce the production observably. Further, the second contact portion  33 ,  33 ′ of the switch  3 ,  3 ′ is under the first contact portion  21 ,  21 ′ of the corresponding contact  2 ,  2 ′, and above portions are separate from each other without a card inserted in the receiving room  10 , and touch each other when a card is inserted into the receiving room  10 ; therefore, the elasticity of the first and second contact portions is enough, and the process of inserting the card could not damage the switch terminal  3  having an opposite extending direction to the card insertion direction. 
         [0025]    It is to be understood, however, that even though numerous, characteristics and advantages of the present invention have been set fourth in the foregoing description, together with details of the structure and function of the invention, the disclosed 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.