| 摘要 |
<P>PROBLEM TO BE SOLVED: To resolve a problem of a playback with insufficient sound effect of a folding-type protective cover for the iPad, which is caused by a diaphragm split into four. <P>SOLUTION: A playback with sufficient acoustic properties is realized by using a diaphragm having rigidity and light paper quality made of a honeycomb material. <P>COPYRIGHT: (C)2013,JPO&INPIT |
