The Personal Computer Memory Card International Association (PCMCIA) is a memory card standard for the interface between a computer and a computer peripheral product. A PCMCIA card (briefly referred to PC card) is an integrated circuit (IC) card that conforms to the PCMCIA standard, and a PCMCIA slot is a slot that conforms this standard. PC cards are widely used for connecting computers and computer peripheral devices. Especially for notebook computers, external peripheral devices are required due to the small size of a notebook computer, and PC cards therefore become an optimum interface. Presently, PC cards mainly act as data transmitting or local network cards for notebook computers, in order to eliminate the user's trouble for carrying heavy peripheral devices.
In order to provide more a superior transporting interface, the PCMCIA developed an express card which is lighter, faster, thinner, easier to use, and applies for more extensive I/O mode than traditional PC cards. The express card has two standards, one is express card/34 having a 34 mm width (small card) and the other is express card/54 having a 54 mm width (big card).
In general, when inserting into a card connector, the express card is positioned in the slot of the card connector and pushed inward to the top of the slot. During insertion, the user has to aim the express card at the opening of card connector carefully thus making a quick insertion difficult. FIG. 7, FIG. 8, and FIG. 9 respectively show a top view of a known card connector, a top view of a known top board, and the cross-section view of A-A line in FIG. 8. When inserting the card (the direction shown by the arrow “a” in FIG. 7 and FIG. 8), if the user can not precisely aim the card at the right position of cover 2 of the card connector (the center of the cover 2), the cover 2 will be undesirably urged and bent in the card-inserting direction “a”, and can be easily damaged. For example the cover 2 can be damaged such that it separates from the card connector.