| 摘要 |
A portable information processing apparatus includes a body having an opening at a top wall thereof, a display unit mounted for pivotal motion on the body, a speaker mounted in an upwardly directed condition in the body below the opening, and a plurality of baffles mounted in the opening for pivotal motion between a first position in which the baffles substantially close up the opening and a second position in which the baffles are inclined by a predetermined angle with respect to the top wall of the body. The portable information processing apparatus further includes a guide member mounted for movement between an advanced position and a retracted position, and a motion conversion mechanism for converting linear motion of the guide member into pivotal motion of the baffles. When the display unit is closed, then the guide member is moved to the retracted position and the baffles are pivoted to the first position in which they substantially close up the opening. When the display unit is opened, then the guide member is moved to the advanced position by the biasing force of a coil spring, whereupon the baffles are pivoted to the second position wherein they are inclined by the predetermined angle with respect to the top wall of the body.
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