发明名称 PORTABLE TERMINAL DEVICE AND HOUSING FOR PORTABLE TERMINAL DEVICE
摘要 The present invention provides a portable terminal device, such as a portable telephone terminal device including a speaker sound hole in a case side and a main display portion in a case front, in which sound pressure of a terminal front direction can be increased. A sound generated from a speaker 103 accommodated in a case 1 is induced to a terminal side by a speaker sound hole 106. A convex portion 109 is formed in a case portion closer to a rear side than the speaker sound hole 106. The convex portion 109 serves as a sound barrier for preventing a sound ejected from the speaker sound hole 106 from being directed to a terminal rear direction. As a result, sound pressure of a terminal front direction is increased.
申请公布号 EP2048894(A1) 申请公布日期 2009.04.15
申请号 EP20070790821 申请日期 2007.07.17
申请人 NEC CORPORATION 发明人 KURODA, JUN;TAKAHASHI, MASATAKE
分类号 H04R1/02;H04M1/03 主分类号 H04R1/02
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