An information processing system using portable terminal unit and data communication adapter therefor.

摘要

In an information processing system having a portable terminal unit (1), such as a hand-held computer, driven by a rechargeable battery (102) and a data communication adaptor (2) for enabling communication between the portable terminal unit and a host computer of the system, the terminal unit and the data communication adaptor are designed to minimize the size thereof in the following five ways. First, a memory card holding mechanism (60) for connecting the memory card (3) of the portable terminal unit is provided between a swinging back lid (6) and a recess of the back casing. Second, a normal interface (101) and a high-speed interface (105) are both provided in the portable terminal unit and the data communication adaptor respectively. Third, an auxiliary connector (16) for an optional device to extend a function of the portable terminal unit is provided in the opening (48) of the casing of the portable terminal unit movable in three dimensions mounted on a printed circuit board. Fourth, a moisture resistant seal (18) made of rubber or resin is molded integrally onto one of the joining edges of an upper casing (10A) and a lower casing (10B). Fifth, an electric power source portion (50) of the data communication adaptor is used not only for charging the battery of the portable terminal unit but also for supplying a power adequate for enabling a data transmission operation thereof. <IMAGE>