Abstract: Module structure of portable memory unit including a control module in which a control circuit is disposed and a drawable module in which a memory is disposed. The drawable module is detachably electrically connected with the control module by a connector and a socket. The control module and the drawable module are formed with cooperative locating structures for associating the control module and drawable module with each other. A user is able to conveniently replace the drawable module with another having different specification and capacity as necessary for expanding the capacity and enlarging the application range of the memory unit.

Abstract: Extensible/retractable and storable portable memory device including a main body and a sheath. The main body has an adapter at one end. One end of the sheath is formed with an opening for fitting the adapter end of the main body. The other end of the sheath is formed with a through hole through which the adapter can outward protrude. Two sides of the sheath are formed with inward projecting stop boards. The middle portions of two sides of the main body are respectively formed with two lateral projecting blocks. The stop boards stop the lateral projecting blocks from outward sliding so that the main body is restricted to relatively slide within the sheath to extend the adapter out of the sheath or retract the adapter therein and locate the adapter in a predetermined position. Therefore, the memory device can be easily used and carried.

Abstract: Extensible/retractable and storable portable memory device including a main body and a sheath. The main body has an adapter at one end. One end of the sheath is formed with an opening for fitting the adapter end of the main body. The other end of the sheath is formed with a through hole through which the adapter can outward protrude. Two sides of the sheath are formed with inward projecting stop boards. The middle portions of two sides of the main body are respectively formed with two lateral projecting blocks. The stop boards stop the lateral projecting blocks from outward sliding so that the main body is restricted to relatively slide within the sheath to extend the adapter out of the sheath or retract the adapter therein and locate the adapter in a predetermined position. Therefore, the memory device can be easily used and carried.