Slim five-in-one memory card adapter

A slim five-in-one memory card adapter, comprising:

• a) a main body having an internal slot and an external receptacle, the internal slot having grooves for fixing different groups of contact fingers in place, the external receptacle being defined by a U-shaped body formed by side walls extending from the internal slot in such a way that the top and external sides thereof are open, a first side wall of the external receptacle being extended in a straight manner from the internal slot and having a height smaller than the height (t) of the MMC (Multi Media Card) series memory cards, a second side wall thereof being tilted outward from the internal slot and having the same height as that of the internal slot, a third side wall parallel to the first side wall being extended from the second side wall and having an equal height in comparison to that of the first side wall, the external receptacle including recesses for receiving the different groups of contact fingers, projecting ribs extending forwards from the internal slot, and lugs disposed at external sides of predetermined recesses, the height of the projecting ribs and the lugs not exceeding the height of the first and third side walls;
• b) a first group of contact fingers having eight contact fingers that have smaller length and are inserted in parallel into the grooves, the contact fingers each including a flexible bent portion at the external side thereof, the bent portions being received within the corresponding recesses, respectively;
• c) a second group of contact finger having only one contact finger that has middle length and is disposed in close vicinity to the inner wall of the second and third side walls, the internal side of the contact finger being inserted into the grooves while the external side thereof is substantially formed to be a flexible bent portion, the bent portion being received within the corresponding recess;
• and
• d) a third group of contact fingers having four contact fingers that have greater length and are inserted into the grooves, the contact fingers each having a flexible bent portion at the external side, the bent portions extending beyond the first contact fingers and being received within the corresponding recesses, respectively,
• wherein the first, second, and third groups of contact fingers have a total of 13 contact fingers that are arranged on the main body, and wherein each of the flexible bent portions has a top surface higher than the first and second side walls, thereby forming a slim five-in-one memory card adapter including SD (Secure Digital) memory cards, MMC memory cards, MMC 4.0 memory cards, RS-MMC (Reduced Size Multi Media Card) memory cards, and RS-MMC 4.0 memory cards.