Abstract: The present invention relates to an SD memory card, including an SD card adapter and a memory card. One end of the SD card adapter is provided with an SD interface, and the other end is provided with a receiving groove. Both ends of the memory card are respectively provided with a set of SDIO interface contacts and a USB interface. The memory card can be inserted into the receiving groove to electrically connect the set of SDIO interface contacts and the SD interface.

Abstract: A USB flash disk includes a metal head with a cavity, a support received in the cavity and a USB flash disk chip disposed on the support. The support includes an upper support and a lower support. One end of the upper support is connected to an end of the lower support. The upper support and the lower support form a receiving cavity therebetween to receive the USB flash disk chip. The upper support is provided with a latching structure with an opening on an outer surface thereof. The opening is defined at one end of the upper support connected to the lower support. The latching structure includes an inclined block located in a middle portion thereof and a latching groove defined on the latching structure away from the end of the upper support connecting to the lower support. An inner wall of the cavity is provided with a latching block latched in the latching groove.

Abstract: The present invention is adapted to data storage technology field, and provides a reading/writing control method and system for nonvolatile memory, the method including the following steps: dividing valid blocks in the nonvolatile memory into different zones, the zones including at least one data zone having fixed number of valid blocks and one exchange zone having at least two valid blocks; creating a mapping table of logic blocks and physical blocks in each zone; establishing a mapping table of logic pages and physical pages in the blocks based on redundant area information of pages in the blocks, and storing the mapping table of the logic blocks and physical blocks in each zone and the mapping table of logic pages and physical pages in each block in a private data area; and writing data segments in an idle page of the blocks of the data zones in sequence, or reading data segments from valid pages in the data zones, thus the data reading/writing speed and efficiency is promoted.

Abstract: The present disclosure relates to the field of players, and provides a portable multimedia player includes a housing; an integrated circuit module received in the housing for playing multimedia; a storage device interface electrically connected to the integrated circuit module, and configured to connect to an external storage device; and a male HDMI connector electrically connected to the integrated circuit module, configured to be connected to a female HDMI of an external display device. The multimedia function of the external display device is expanded by connecting the male HDMI 11 to the female HDMI of the external display device. The portable multimedia player is connected to the display device without any corresponding interface cable, such that it affords convenient using to users and beautiful appearance.

Abstract: An adjustable USB female connector includes a metal top shell, an insulated main body with connection pins which are compatible with USB interface protocol, and a metal bottom shell. The connection pins are fixed on the insulated main body. The insulated main body is fastened in the metal top shell. The metal top shell is slidably connected to the metal bottom shell, and the total thickness of the metal top shell and the metal bottom shell is variant. In a first orientation, the thickness of the USB female connector is the smallest, and the thickness is smaller than that of the standard USB female connector. In a second orientation, the metal bottom shell is pulled out, the thickness of the USB female connector increases and reaches the thickness of the standard USB female connector.

Abstract: The present invention relates to an SD memory card, including an SD card adapter and a memory card. One end of the SD card adapter is provided with an SD interface, and the other end is provided with a receiving groove. Both ends of the memory card are respectively provided with a set of SDIO interface contacts and a USB interface. The memory card can be inserted into the receiving groove to electrically connect the set of SDIO interface contacts and the SD interface.

Abstract: A USB flash disk includes a metal head with a cavity, a support received in the cavity and a USB flash disk chip disposed on the support. The support includes an upper support and a lower support. One end of the upper support is connected to an end of the lower support. The upper support and the lower support form a receiving cavity therebetween to receive the USB flash disk chip. The upper support is provided with a latching structure with an opening on an outer surface thereof. The opening is defined at one end of the upper support connected to the lower support. The latching structure includes an inclined block located in a middle portion thereof and a latching groove defined on the latching structure away from the end of the upper support connecting to the lower support. An inner wall of the cavity is provided with a latching block latched in the latching groove.

Abstract: A method of encrypting/decrypting the document and a safety management storage device and system method of its safety management, using for the safety management of electronic documents, the said system comprising a PC or mainframe installed with common reading software and a storage device of safety management connected to the said PC/mainframe through hot-plug; when connected to the mainframe, the said storage device is enumerated as a USB CDROM device at least. The user owns the said storage device can encrypt the electronic documents by using the encryption keys to generate an encrypted document with the same file type, also can open the encrypted document by using common reading software, and then use the document according to the predetermined operation authority.

Abstract: A method of encrypting/decrypting the document and a safety management storage device and system method of its safety management, using for the safety management of electronic documents, the said system comprising a PC or mainframe installed with common reading software and a storage device of safety management connected to the said PC/mainframe through hot-plug; when connected to the mainframe, the said storage device is enumerated as a USB CDROM device at least. The user owns the said storage device can encrypt the electronic documents by using the encryption keys to generate an encrypted document with the same file type, also can open the encrypted document by using common reading software, and then use the document according to the predetermined operation authority.

Abstract: A method of encrypting/decrypting the document and a safety management storage device and system method of its safety management, using for the safety management of electronic documents, the said system comprising a PC or mainframe installed with common reading software and a storage device of safety management connected to the said PC/mainframe through hot-plug; when connected to the mainframe, the said storage device is enumerated as a USB CDROM device at least. The user owns the said storage device can encrypt the electronic documents by using the encryption keys to generate an encrypted document with the same file type, also can open the encrypted document by using common reading software, and then use the document according to the predetermined operation authority.

Abstract: The present invention is adapted to data storage technology field, and provides a reading/writing control method and system for nonvolatile memory, the method including the following steps: dividing valid blocks in the nonvolatile memory into different zones, the zones including at least one data zone having fixed number of valid blocks and one exchange zone having at least two valid blocks; creating a mapping table of logic blocks and physical blocks in each zone; establishing a mapping table of logic pages and physical pages in the blocks based on redundant area information of pages in the blocks, and storing the mapping table of the logic blocks and physical blocks in each zone and the mapping table of logic pages and physical pages in each block in a private data area; and writing data segments in an idle page of the blocks of the data zones in sequence, or reading data segments from valid pages in the data zones, thus the data reading/writing speed and efficiency is promoted.

Abstract: The present invention is adapted to connector field and provides an ultrathin USB female connector, including a metal top shell, an insulated main body with connection pins which are compatible with USB interface protocol, and a metal bottom shell. The connection pins are fixed on the insulated main body. The insulated main body is fastened in the metal top shell. The metal top shell is slidably connected to the metal bottom shell, and the total thickness of the metal top shell and the metal bottom shell is variant. The USB female connector provided by the present invention, when the metal top shell and the metal bottom shell are matched with each other completely, the thickness of the USB female connector is the smallest, and the thickness is smaller than that of the standard USB female connector, thus the USB female connector provided by the present invention can be applied to ultrathin devices.

Abstract: The present invention discloses a card reader and a mobile payment terminal. The card reader comprises an NFC antenna connected to a dual interface smart stage card card for performing data interchange between a contactless card reading terminal and the dual interface smart stage card card; an MCU connected to the dual interface smart stage card card for reading data from the dual interface smart stage card card or writing data in the dual interface smart stage card card; and a data interface unit connected to the MCU for establishing communication between the MCU and a communication terminal. In an embodiment of the present invention, by installing an NFC antenna, the dual interface smart stage card card in the card reader can interchange data with a contactless card reading terminal wirelessly in a passive environment.

Abstract: The present invention discloses a transaction method with an E-payment Card and an E-payment card. The method includes the steps of: receiving transaction instructions sent from a peripheral e-equipment using communication interfaces of an E-payment card; authenticating the peripheral e-equipment's authorization of access to a storage unit of the E-payment card using a processor of the E-payment card; and if the authentication is successful, performing corresponding operation to the data in the storage unit in response to the transaction instruction by the processor of the E-payment card. The E-payment card is provided with a plurality of communication interfaces, through which it transacts with different peripheral e-equipments to be suitable for the transactions, charging, etc. in different occasions, which is more convenient for users.

Abstract: The present invention discloses a card reader and a mobile payment terminal. The card reader comprises an MCU which is connected to a single interface smart stage card and is configured to read data from the single interface smart stage card or write data in the single interface smart stage card; an NFC antenna which is connected to the MCU and is configured for performing data interchange between a contactless card reading terminal and the single interface smart stage card; and a DIU which is connected to the MCU and is configured to realize communication between the MCU and a communication terminal. In this way, by installing an NFC antenna, the single interface smart stage card in the card reader can interchange data with a contactless card reading terminal wirelessly without connecting to the DIU.

Abstract: A method of encrypting/decrypting the document and a safety management storage device and system method of its safety management, using for the safety management of electronic documents, the said system comprising a PC or mainframe installed with common reading software and a storage device of safety management connected to the said PC/mainframe through hot-plug; when connected to the mainframe, the said storage device is enumerated as a USB CDROM device at least. The user owns the said storage device can encrypt the electronic documents by using the encryption keys to generate an encrypted document with the same file type, also can open the encrypted document by using common reading software, and then use the document according to the predetermined operation authority.