A card reader may include a card insertion port; a card passage; and a disturbing magnetic field generator. The disturbing magnetic field generator may include a first disturbing magnetic field generation part and a second disturbing magnetic field generation part which are disposed so as to interpose the card passage. The first disturbing magnetic field generation part may include a first core formed of magnetic material and a coil wound around the first core, and the second disturbing magnetic field generation part may include a second core formed of magnetic material and a coil wound around the second core.

A card reader for use with a card having a magnetic stripe may include a card insertion port into which the card is inserted; a card passage along which the card is passed; and a disturbing magnetic field generation means structured to generate a magnetic field for disturbing illegal reading of magnetic data recorded in the magnetic stripe. The disturbing magnetic field generation means may include a plurality of coils which are serially-connected with each other; a capacitor connected in parallel with the plurality of the coils; and a drive circuit structured to supply an electric current to the plurality of the coils.

The present invention is applicable to the field of POS machines, and provides a magnetic head protection frame used in a POS machine, a card swiping module using the magnetic head protection frame, and a POS machine using the card swiping module. The magnetic head protection frame comprises a support frame, the support frame is strip-shaped, and the support frame defines a first opening exposing the magnetic head; a circuit board is mounted on an outside surface of the support frame, the circuit board is arranged along the whole length direction of the support frame, and the circuit board avoids a position corresponding to the first opening; connecting wires are connected on the circuit board. By arranging the circuit board on the outside surface of the support frame, since the circuit board will be open-circuited or short-circuited when it is subjected to a physical attack, an alarming signal will be triggered, and thus a security processor on a main board of the POS machine can be triggered, such that information stored in electronic components in a protected area is erased or destroyed, the function of preventing user information from being stolen is achieved, and the magnetic head is protected so as to read card information safely.

A card reader may include a conveyance passage; an optical sensor; a first circuit board; a second circuit board; a first cover member; a second cover member; a first frame; and a second frame comprising a conveyance face on a second direction side of the card conveyance passage. The first frame may include a first transmission hole, and the first frame may be attached with one of the first circuit board and the second circuit board. The second frame may include a second transmission hole, and the second frame may be attached with the other of the first circuit board and the second circuit board. The first cover member may be fixed to the first circuit board so as to cover the entire light emitting element; and the second cover member may be fixed to the second circuit board so as to cover the entire light receiving element.

Die may be thinned using a thinning and/or a polishing process. Such thinned die may be flexible and may change operational characteristics when flexed. The flexible die may be applied to a mechanical carrier (e.g., a PCB) of a card or device. Detection circuitry may also be provided on the PCB and may be used to detect changed operational characteristics. Such detection circuitry may cause a reaction to the changed characteristics by controlling other components on the card or device based upon the flex-induced changed characteristics. The thinned die may be stacked, interconnected, and encapsulated between sheets of laminate material to form a flexible card or device.

Die may be thinned using a thinning and/or a polishing process. Such thinned die may be flexible and may change operational characteristics when flexed. The flexible die may be applied to a mechanical carrier (e.g., a PCB) of a card or device. Detection circuitry may also be provided on the PCB and may be used to detect changed operational characteristics. Such detection circuitry may cause a reaction to the changed characteristics by controlling other components on the card or device based upon the flex-induced changed characteristics. The thinned die may be stacked, interconnected, and encapsulated between sheets of laminate material to form a flexible card or device.

A method for manufacturing a magnetic core module in a magnetic head, the magnetic core module and the magnetic head. The method for manufacturing the magnetic core module includes: a process for placing a magnetic core group in a holder mold cavity as an insert; and a process for injection-molding in the holder mold cavity. A method for manufacturing the magnetic core module allows the magnetic core group and the holder to be integrally injection-molded with a method of injection molding which uses the magnetic core group as an insert. The method simplifies the process of manufacturing a magnetic head to improve production efficiency, and saves labor and production costs. Further, the method prevents failures such as positional displacement and scattering of magnetic cores, which tends to occur when assembling thin and small magnetic cores, and ensures an ideal yield for a product.

The present invention is applicable to the field of POS machines, and provides a magnetic head protection frame used in a POS machine, a card swiping module using the magnetic head protection frame, and a POS machine using the card swiping module. The magnetic head protection frame comprises a support frame, the support frame is strip-shaped, and the support frame defines a first opening exposing the magnetic head; a circuit board is mounted on an outside surface of the support frame, the circuit board is arranged along the whole length direction of the support frame, and the circuit board avoids a position corresponding to the first opening; connecting wires are connected on the circuit board. By arranging the circuit board on the outside surface of the support frame, since the circuit board will be open-circuited or short-circuited when it is subjected to a physical attack, an alarming signal will be triggered, and thus a security processor on a main board of the POS machine can be triggered, such that information stored in electronic components in a protected area is erased or destroyed, the function of preventing user information from being stolen is achieved, and the magnetic head is protected so as to read card information safely.

An information medium reading device may include a magnetic head to read magnetic datum and output an analog magnetic signal; an image sensor to take a photo of image datum and output an analog image signal; an analog switch unit to select one of the analog magnetic signal and the analog image signal and output the selected one; an analog front-end unit having an analog/digital (A/D) conversion function for converting an analog signal to a digital signal, while using a voltage according to a black reference voltage at the time of image reading, as a bottom voltage, within a predetermined converted voltage range; a level adjustment unit to make a level adjustment; and a timing control unit. The analog magnetic signal may be input into the analog front-end unit, and an A/D conversion may be carried out for converting an analog signal to a digital signal.

A magnetic field generator may include a magnetic field generation part including a resonance part including an inductor and a capacitor connected with each other, and which is structured so that an AC current is flowed between the inductor and the capacitor by charging electric charge to the capacitor and discharging the electric charge to generate a magnetic field by a resonance; a current direction monitoring section structured to monitor a direction of a current flowing through the inductor of the magnetic field generation part; and a judging section structured to control a timing for charging in the magnetic field generation part depending on the direction of the current flowing through the inductor which is obtained by monitoring of the current direction monitoring section.