A sound producing device comprising: a speaker unit and a housing, wherein the speaker unit comprises a vibration system which comprises a vibrating diaphragm and a voice coil; a front and rear acoustic cavities are formed between the vibrating diaphragm and the housing, respectively; the side surface of the housing is provided with a sound hole communicating with the front acoustic cavity; the vibrating diaphragm comprises a dome portion and a suspension ring portion; the side of the suspension ring portion connected to the dome portion is provided with a dome connecting portion, and the side of the suspension ring portion combined with the housing is provided with a housing bonding portion; and a height difference exists between the housing bonding portion and the dome connecting portion. The present invention increases the size of the sound hole and the speaker unit, thus improving the acoustic performance of a product.

A sound producing device comprising: a speaker unit and a housing, wherein the speaker unit comprises a vibration system which comprises a vibrating diaphragm and a voice coil; a front and rear acoustic cavities are formed between the vibrating diaphragm and the housing, respectively; the side surface of the housing is provided with a sound hole communicating with the front acoustic cavity; the vibrating diaphragm comprises a dome portion and a suspension ring portion; the side of the suspension ring portion connected to the dome portion is provided with a dome connecting portion, and the side of the suspension ring portion combined with the housing is provided with a housing bonding portion; and a height difference exists between the housing bonding portion and the dome connecting portion. The present invention increases the size of the sound hole and the speaker unit, thus improving the acoustic performance of a product.

A loudspeaker, includes a front cover; a frame forming an accommodation space together with the front cover, the frame including a side wall; a vibration system accommodated in the accommodation space; and a magnetic circuit system accommodated in the accommodation space. The magnetic circuit system includes a yoke and a magnet disposed on the yoke, and the yoke includes a support plate and a bending wall extending perpendicularly from an edge of the support plate. Some gaps are formed between the bending walls and the side wall of the frame for containing glue, and the side wall forms a plurality of lockholes communicated with the gaps.

A bone conduction device includes: a case; a vibrating body disposed in the case; and a first weight held by the vibrating body vibrating body. The vibrating body includes a support portion supported by the case and a first holding portion that holds the first weight. A center of mass of the first weight is located outside a first normal region of the vibrating body in the first holding portion.

An acoustic transducer includes a first acoustic module and a second acoustic module. The first acoustic module includes a first motor, a first rod driven by the first motor, and a first vibrating plate connected to the first rod and vibrating. The second acoustic module includes a second motor, a second rod driven by the second motor, and a second vibrating plate connected to the second rod and vibrating. The first rod and the second rod are coaxially with each other.

Disclosed is a vibration sound-producing apparatus. A sound output aperture of the vibration sound-producing apparatus is provided at a lateral surface. A diaphragm corresponds to the position of the sound output aperture. A flat sound coil is perpendicular to the diaphragm. A magnet is parallel to the sound coil. The vibrating direction of the sound coil avoids a thickness direction. The vibrating direction of the magnet and a mass block also avoids the thickness direction. The mass block is fixedly joined to a housing via a flexible piece. This facilitates reduced product thickness, increased product performance, and a simplified product production process. Therefore, the vibration sound-producing apparatus of the present invention has the advantages of a great thickness-reduced design, great performance, and simple assembly.

Disclosed are a voice coil for a sound producing device and a sound producing device, the sound producing device comprises a voice coil body and a reinforcing portion; the voice coil body comprises a voice coil framework and a voice coil wire; the reinforcing portion comprises a first reinforcing portion and a second reinforcing portion; the first reinforcing portion is provided on the inner side of the voice coil framework, and the second reinforcing portion is provided on the outer side of the voice coil framework; and the reinforcing portion is configured to enhance the strength of the voice coil at high frequencies. Both the inner side and the outer side of the voice coil framework are provided with the reinforcing portions, thereby preventing the voice coil framework from deforming towards the side with lower strength because the strength of one side of the voice coil framework is relatively low.

Provided is a method of manufacturing a voice coil, and more particularly, a method of manufacturing a voice coil in which a coil pattern is formed on a wafer level package. The method includes (a) forming a first coil pattern including a first area in which a first seed metal layer is exposed upward, a second area in which a first passivation layer for forming a via hole in the first area is formed, and a third area in which a first photoresist layer is formed in a portion of the first area and the second area on an upper surface of a wafer, (b) filling an inside of the via hole formed in the first coil pattern with a conductive material and forming first coil windings, and (c) removing the first photoresist layer formed in the third area.

Provided is a method of manufacturing a voice coil, and more particularly, a method of manufacturing a voice coil in which a coil pattern is formed on a wafer level package. The method includes (a) forming a first coil pattern including a first area in which a first seed metal layer is exposed upward, a second area in which a first passivation layer for forming a via hole in the first area is formed, and a third area in which a first photoresist layer is formed in a portion of the first area and the second area on an upper surface of a wafer, (b) filling an inside of the via hole formed in the first coil pattern with a conductive material and forming first coil windings, and (c) removing the first photoresist layer formed in the third area.

The present invention relates to a loudspeaker which can be arranged to minimise its overall depth while also increasing the breakup frequency and reducing potential rocking vibrations. Accordingly, the present invention is directed to a loudspeaker, comprising a magnet structure, and a voice coil lying within a magnetic field established by the magnet structure and responsive to electrical signals to undergo excursions from a rest position along an axis of motion; a driven body, connected to the voice coil and moveable to project acoustic waves from a front of the loudspeaker; and a suspension for providing a restoring force to the driven body towards the rest position, the suspension extending from an attachment point on the driven body to an attachment point on a fixed portion of the loudspeaker; wherein the driven body comprises a diaphragm and a support structure extending rearwardly from a connection point with the voice coil to a connection point with the suspension located rearward of the frontal part of the magnet structure.