Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro LLP
Electronic system having portable electronic apparatus and external expansion unit for expanding function of electronic apparatus
 An electronic system includes an electronic apparatus body and an external expansion unit. The electronic apparatus body has a bottom surface and a rear surface. A first connector is arranged on the rear surface. The external expansion unit has a first surface opposing the bottom surface, and a second surface opposing the rear surface. The external expansion unit has a second connector which is detachably connected to the first connector. The external expansion unit has an engaging device. The engaging device is movable between the first position where the engaging device is separated from the bottom surface and the second position where the engaging device is engaged with the bottom surface to pull the electronic apparatus body toward the second surface. The external expansion unit has an operation mechanism for selectively moving the engaging device to the first and second positions. 
Kabushiki Kaisha Toshiba
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Tadamichi Keizo Shigeru Kenichi Hiroshi Kazuya Kazuyuki Takaichi Hironori Moriya
Shimohira Ohgami Sekine Ishikawa Nakamura Shibasaki Matsuda Kobayashi Ito Gibo