Abstract: A structure of memory card connector that comprises a first slot, a second slot, and a third slot for inserting many kinds of memory card. Moreover, the above memory card connector further comprises an interface circuit coupling with the memory card(s) inserted into the first slot, the second slot, and the third slot. In accordance with the memory card connector, the second slot and the third slot are set above or below the first slot. Further, the rear end of the memory card connector is provided with a memory card detecting terminal, a grounding terminal and a write-protect terminal for showing the connection condition between the memory card connector and the memory card.

Abstract: An improved structure of a card reader is provided, which comprises of a sideway card ejection switch and a sliding housing. The sideway card ejection switch and the sliding housing structure that can reduce the component count to minimize the production cost. In addition, by improving the robustness of the structure, the reliability of the card reader is increased leading to the ultimate goal of extending its operation life.

Abstract: The invention relates to a multi-functional optical disk driving device used in personal computer (PC), which has functions of a compact-disk (CD) driver, a digital versatile disk (DVD) driver, a frequency modulated (FM) radio, a MP3 music CD player, such device comprises: a multi-functional vision process controller (VPC) having a PC power on status detector; a microprocessor; a bus switch; an optical disk server; and a connecting device. The multi-functional optical disk driving device of present invention is characterized in that the device can perform these functions without making use the control from the operating system (OS) of a personal computer even if the PC is off and these functions are performed by the PC when the PC is on.