| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve acoustic characteristics by improving acoustic effect suppression due to polyurethane foam by the arrangement or the like of a speaker. <P>SOLUTION: A cushion 20 obtained by cutting a spring structure resin body 10 is built in a back cushion. In constitution for arranging a speaker in the spring structure resin body 10, a hole part 23 having size corresponding to the outer periphery (outer edge) of the frame 25 of the speaker is formed on a surface layer 14 which is the surface of the spring structure resin body 10 so that a cone sheet 26 for the speaker is turned to the user's body side in either one of the surface and rear layers 14, 15 of the spring structure resin body 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
