| 摘要 |
An electronic apparatus system comprises a portable computer and an extension device for expanding the function of the portable computer. The extension device includes a base, which has a mounting portion on which the portable computer is removably mounted, an exhaust port opened in the mounting portion of the base and a fan unit housed in the base and arranged to supply cooling air to the exhaust port. The base has a plurality of convex portions formed in a bottom wall that extend upward towards the exhaust port and form a foreign matter capturing region in the base. The base includes an exhaust passage for channeling cooling air from the fan over the bottom surface of the portable computer. The fan unit is inclined so that the axis of rotation is tilted toward the opening in the side wall of the mounting portion at the end of the exhaust passage. A seal is formed around the exhaust passage on the top surface of the mounting portion so that when the portable computer engages the extension device, an air seal is formed to prevent cooling air from exhausting except through the opening in the side wall of the extension device.
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