| 摘要 |
Disclosed is a micro speaker, comprising a vibrating system, a magnetic circuit system and a support system; the vibrating system comprises a vibrating diaphragm voice coil; a vibrating diaphragm comprises a spherical top portion and a bending ring portion; the magnetic circuit system comprises a spring washer, a magnet and a magnet yoke combined with each other in sequence; a recessed groove structure is provided at a position of an upper casing corresponding to the spherical top portion of the vibrating diaphragm; a give-way groove is provided at a position of the spherical top portion aligned with the groove structure of the upper casing; the longitudinal depth of the give-way groove is not less than the depth of the groove structure of the upper casing; an orthographic projection area of the give-way groove covers an orthographic projection area of the groove structure of the upper casing; a give-way structure is provided on the spring washer of the give-way groove aligned with the vibrating diaphragm; the longitudinal depth of the give-way structure is not less than the depth of the give-way groove; and the orthographic projection area of the give-way structure covers the orthographic projection area of the give-way groove of the vibrating diaphragm. The structure ensures the normal operation of a product and acoustic performance of a micro speaker while cooperating with the upper casing to prevent collision of components. |
