Abstract: A miniaturized electronic device including a battery storing container having an opening for placing a battery in and out, a recording medium storing part for storing a recording medium detachably, and a plurality of circuit boards constituting predetermined circuits, wherein the recording medium storing part and the plurality of circuit boards are placed so as to surround the outside of the battery storing container except at its opening.

Abstract: Disclosed is an electronic device including: a functional unit built by assembling component parts and having a shape substantially resembling a flat, rectangular solid; and a case holding the functional unit therein and having a shape substantially resembling a flat, rectangular solid. In the device, the functional unit has a first major surface, a second major surface opposite the first major surface, and four side surfaces extending between the respective peripheries of the first and the second major surface; and the case has a first cover covering the first major surface of the functional unit, a second cover covering the second major surface of the functional unit, and a third cover covering three continuous ones of the four side surfaces of the functional unit.

Abstract: Miniaturization of an electronic device including a battery storing container and extending the battery operation time are realized. An electronic device has a battery storing container having an opening for placing a battery in and out, a recording medium storing part for storing a recording medium detachably and a plurality of circuit boards constituting predetermined circuits, wherein the recording medium storing part and the plurality of circuit boards are placed so as to surround the outside of the battery storing container except at its opening.

Abstract: The present invention provides a recording medium device ejection structure which is useful to minimize the outside dimension of a recording medium device and to increase the mounting area of a printed circuit on an adapter to which the recording medium device is inserted. The recording medium device comprises a recording medium body and a case having a recess for accommodating the recording medium body, and is attached to the adapter detachably. The adapter is provided with a cover, the first lever provided on the cover, and the second lever which is in contact with the first lever at one end. The first lever gets in the recess provided on the recording medium device to resultantly push up the recording medium device, and the recording medium device is thereby ejected. A connector not shown in the drawing to which the recording medium device is inserted does not necessarily have a recording medium device ejection mechanism, and thus the product is made small-sized.