Abstract: In an IC card reader/writer of the present invention including a control section for controlling a power supply to a detachable IC card, a supply of an operation clock, a reset thereof, and an I/O branch section for receiving/transmitting serial data from/to the IC card, wherein a signal is received/transmitted between a personal computer and the control section and data is received/transmitted between the personal computer and the I/O branch section, the IC card reader/writer comprises a serial-parallel converter for mutually converting serial data receiving/transmitting from/to the IC card and parallel data receiving/transmitting from/to the personal computer, an access control section connected to the personal computer by an address bus and a control signal line, an IC card data port and a status port both connected to the personal computer by a data bus and connected to the serial-parallel converter, and a reader/writer control port connected to the personal computer by the data bus and connected to the c

Abstract: An IC card data processing device, insertable into a standard memory expansion card slot of a computer, includes an outer main frame and an inner main frame to which the inner main frame is fixed. Within the inner main frame, first and second aligning mechanisms are provided respectively near an entrance and at a distal end of an IC card insertion path for aligning IC card inserted into the path. A slider, urged by springs toward the entrance end of the IC card insertion path, is moved toward the distal end by the inserted IC card. A link is connected between the slider and a card release button so that when the release button is pressed, the slider moves toward the entrance of the IC card insertion path to eject the card. A contact holder is fitted within an opening of the slider. The contact holder holds contacts for making an electrical connection with the IC card.

Abstract: A portable terminal includes a main body having a mounting portion. A processing section for processing information is arranged in the main body and has a memory for storing information. A battery is removably mounted in the mounting portion and releasably locked at a predetermined loaded position in the mounting portion. The battery is electrically connected to the processing section through connecting members. When the battery is removed from the mounting portion, the start of operation for the removal is detected by a detecting switch. During the time interval between the start of the removal operation and the point of time when the electrical connection by the connecting members is cut off, the in process data is entered into the memory by an entering section, in response to a detection result from the detecting switch.

Abstract: An image forming apparatus includes an optical system for forming a latent image corresponding to an image of a document placed on a document table and a plurality of developing units for developing the latent image using toners having different colors. An automatic document feeder is arranged on the document table to automatically set the document on the document table. A spot sensor is arranged on the automatic document feeder to detect developing color information representing which color is used to develop the latent image. One of the developing units is selected on the basis of a detection result of the spot sensor.

Abstract: An image forming apparatus comprises four developing units for developing an electrostatic latent image formed on a photosensitive drum, and a revolving unit for revolving the developing units in parallel relation and selecting one of the developing units for use by stopping to revolve the developing units at a predetermined position. The four developing units are stored individually with developing agents of different types. The revolving unit is supported by a rockable suspension member at a distance from the center of rocking of the member, and can swing toward and away from the drum. The revolving unit is moved toward and away from the drum by a shifting mechanism. A locating member is attached to each developing unit, while a locating pin is provided on a housing of the apparatus. When the revolving unit is brought close to the drum by the shifting mechanism, the relative positions of the drum and the developing unit selected by the revolving unit are determined.