Micro-Speaker
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United States of America Patent
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Issued Date -
Feb 27, 2014
app pub date -
Aug 27, 2013
filing date -
Aug 27, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A micro-speaker includes a vibrating unit including a diaphragm and a voice coil, and a magnetic circuit unit supporting the diaphragm. The diaphragm includes a position portion serving as an edge of the diaphragm. The magnetic circuit unit includes a base board, a first magnetic conduction member disposed at a central portion of the base board, a second magnetic conduction member around the first magnetic conduction member, and a magnetic gap formed by the first and second magnetic conduction members. A projection of the diaphragm along the vibration direction on the base board is within an outline of the base board. The micro-speaker has no frame or any structure with a frame configuration, which makes the magnetic circuit unit enlarge for providing improved performance.
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