发明名称 |
Speaker unit and portable information terminal |
摘要 |
A speaker unit and a portable information terminal that are reduced in size and thickness and still produce a high sound pressure. A speaker unit includes: a yoke having a rectangular outline as seen in a plan view; a magnet member placed on the yoke and magnetized so that an upper surface of the magnet member has an N pole and an S pole aligned in one direction; a coil placed above and spaced from the upper surface of the magnet member; a diaphragm attached to the coil; and a frame supporting the diaphragm. The yoke includes an attachment which protrudes upward from an outer periphery of the yoke for attachment to the frame. The attachment has a recess at least in a central portion of the attachment which crosses the one direction.
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申请公布号 |
US8565471(B2) |
申请公布日期 |
2013.10.22 |
申请号 |
US200913142077 |
申请日期 |
2009.11.11 |
申请人 |
MARUGAMI TAKASHI;SANYO ELECTRIC CO., LTD. |
发明人 |
MARUGAMI TAKASHI |
分类号 |
H04R25/00 |
主分类号 |
H04R25/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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