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US 2013/0279737 A1Published application
Micro-speaker
AssigneeAac Acoustic Technologies (Shenzhen) Co., Ltd.
InventorsWen-Tao Jiang, Lei Shi, Xiong Zhang, San-You Wu, Lin-Zhen Li
Life of this patent
Estimating the term…
Abstract
A micro-speaker includes a yoke, a magnet assembly attached to the yoke, a voice coil, and a diaphragm connected with the voice coil. The yoke defines a bottom wall, and a number of sidewalls extending upwards from the bottom wall. The magnet assembly includes a main magnet positioned on the bottom wall, and a number of secondary magnets positioned on tops of the sidewalls.
Claims12
A micro-speaker comprising:
- a yoke defining a bottom wall, a plurality of sidewalls extending upwards from the bottom wall, and a plurality of fringes extending outwards from top faces of the sidewalls along directions parallel to the bottom wall;
- a magnet assembly attached to the yoke, including a main magnet positioned on the bottom wall and a plurality of secondary magnets positioned on tops of the fringes;
- magnetic gaps formed between the magnet assembly and the yoke, including a first magnetic gap formed between an outer surface of the main magnet and an inner surface of the sidewalls of the yoke and a second magnetic gap formed between the main magnet and the secondary magnets, the first magnet gap being communicated with the second magnetic gap;
- a voice coil partially received in a combination of the first and second magnetic gaps;
- a diaphragm connected with the voice coil.
2 more elements
A micro-speaker comprising:
- a frame, including an upper portion and a lower portion;
- a magnetic circuit unit accommodated in the frame and retained by the lower portion, including a yoke with a receiving space, a main magnet disposed in the receiving space and forming a first magnetic gap corporately with the yoke, at least one secondary magnet attached to the yoke and disposed outside of the receiving space;
- a vibrating unit engaged with the frame, including a diaphragm and a voice coil connected with the diaphragm;
- a second magnetic gap formed between the main magnet and the at least one secondary magnet;
- wherein
- the voice coil is partially inserting into the first magnetic gap via the second magnetic gap;
- the lower portion includes at least a slot disposed at an inner face thereof for receiving the secondary magnet.
4 more elements
A micro-speaker comprising:
- a frame;
- a magnetic circuit unit accommodated in the frame, including a yoke with a bottom wall carrying a part of the magnetic circuit unit, a plurality of sidewalls extending perpendicularly from the periphery of the bottom wall and including a pair of fringes parallel to the bottom wall, a main magnet disposed on the bottom wall and forming a first magnetic gap corporately with the plurality of sidewalls, and at least two secondary magnets attached to the fringes and locating at the top of the magnetic circuit unit;
- a vibrating unit engaged with the frame, including a diaphragm and a voice coil connected with the diaphragm, the diaphragm including a top plate and a periphery portion surrounding the top plate;
- a second magnetic gap formed between the main magnet and the at least two secondary magnets;
- wherein
- the voice coil partially inserts into the first magnetic gap via the second magnetic gap;
- the secondary magnets are disposed within a projection of the periphery portion of the diaphragm along a direction perpendicular to the bottom wall.
4 more elements
Dependencies are inferred from the claim text.