A micro-speaker includes an annular bracket, a diaphragm, a voice coil, a base, and two magnet members. The annular bracket includes a first hollow portion, two opposite first long side portions, and two first short side portions between the first long side portions. The first long side portions and the first short side portions are around the first hollow portion. The diaphragm is on a top side of the annular bracket and connected to the first long side portions and the first short side portions. The base is on a bottom side of the annular bracket and includes a magnetic convex portion. The voice coil is in the first hollow portion, between the diaphragm and the base, and around the magnetic convex portion. The magnet members are respectively between the first long side portions and the base. The voice coil and the magnetic convex portion are between the magnet members.

A speaker includes a vibration structure, a magnetic circuit structure, and a housing having a cavity receiving the vibration structure and the magnetic circuit, the vibration structure comprises: a diaphragm fixed to the housing and a voice coil driving the diaphragm to vibrate and sound, the diaphragm comprises a dome located at an intermediate position and a suspension connected to the dome, the suspension comprises a first fixing portion fixed to the housing, a second fixing portion connected to the dome, and a wrinkle portion that connects the first fixing portion with the second fixing portion, the dome is fixed at a side of the second fixing portion facing towards the voice coil, and comprises an edge portion connected to the voice coil, and the edge portion comprises a recessed portion formed by recessing from a surface connected to the voice coil along a direction away from the voice coil.

A speaker is provided, including a vibration structure, a magnetic circuit structure and a housing including a holder and a front cover. The magnetic circuit structure includes a lower splint, a main magnet, side magnets and an upper splint attached to upper ends of the side magnets. Each side magnet includes an upper end surface facing the upper splint, and a recessed portion recessed from a side of the upper end surface close to the main magnet towards the lower splint. The recessed portion includes a first surface. The upper splint includes a main body portion, a first step portion formed by extending from an edge at the side of the main body portion close to the main magnet while being bent towards the first surface and fixed to the second surface, and a second step portion fixed to the first surface.

The present invention discloses a speaker having a frame, a vibrating system and a magnetic circuit system. The vibrating system has a vibrating diaphragm, a voice coil for driving the vibrating diaphragm, and an elastic supporting assembly fixed on the frame and connected to the voice coil. The magnetic circuit system has a main magnet, a secondary magnet spaced on two opposite sides of the main magnet, a magnetic plate stacked on the secondary magnet and spaced away from the elastic supporting assembly, and an auxiliary magnet fixed on the magnetic plate and spaced away from the main magnet. The elastic supporting assembly is positioned on the other two opposite sides of the main magnet. The auxiliary magnetic located close to the vibrating diaphragm and facing to the elastic supporting assembly. The speaker of the present invention has advantages of good reliability and excellent acoustic performance.

A speaker includes a frame; a magnetic circuit system in the frame; and a vibrating system in the frame. The vibrating system includes a suspension ring fixed on the frame, a number of domes fixed at a center of the suspension ring and a voice coil connected below the domes. The domes includes a first dome and a second dome stacked with each other. The second dome has a body part and a number of convex parts extending from the body part to the magnetic circuit system; a number of intervals each formed between every two contiguous convex parts. The convex part includes a bottom surface close to the magnetic circuit system. The voice coil buts the bottom surface and forms leakage passages with the second dome at the interval positions.

An audio processor for a multi voice coil acoustic transducer is described. The audio processor may receive or generate an audio signal. The audio signal may have one or more phase shifts applied. The audio signal may be used to drive a first coil of a dual voice coil acoustic transducer. The phase-shifted audio signals may drive the other coils of a multi voice-coil acoustic transducer. The phase shift is selected so that the phase difference between the audio signal driving each voice coil may result in destructive interference in the multi voice-coil loudspeaker resulting in reduced or no acoustic output due to the audio signal.

The present invention discloses a speaker, which includes a basket, a vibration system fixed to the basket, and a magnetic circuit system arranged in the basket. The vibration system includes a first diaphragm fixed to the basket and a second diaphragm oppositely separated from the first diaphragm, the magnetic circuit system includes an upper clamping plate fixed to the basket, and the upper clamping plate is disposed separately from the second diaphragm. The upper clamping plate includes a fixing portion fixed to the basket, the upper clamping plate is provided with a step recessed towards the first diaphragm from one side of the upper clamping plate facing away from the first diaphragm, and the step is connected with the fixing portion.

Various implementations include loudspeaker transducers. In some aspects, an electro-acoustic transducer includes: a diaphragm configured to move along an axis; a voice coil having a plurality of windings around the axis; a voice coil support configured to transfer forces from the voice coil to the diaphragm; a support structure that inhibits radial motion or tilting motion of the diaphragm and the voice coil support; and a magnetic core for driving the voice coil, the magnetic core including: two magnets having opposite polarity and approximately equal magnetic strength, where each of the magnets surrounds the voice coil, where a magnetic field from each magnet is approximately symmetric along the axis, and where the magnetic field from both magnets drives the voice coil.

A transducer system, comprising an electrodynamic acoustic transducer (1) with a membrane (3), a plurality of voice coils (7, 8) electrically switched in series, and a magnet system (9, 10, 11) is presented, wherein just an outer tap/terminal (T2) of the serially connected voice coils (7, 8) is electrically connected to an audio output of an amplifier (17). Moreover, a method for feeding a sound signal to an electrodynamic acoustic transducer (1) is presented, wherein the voice coils (7, 8) are driven by an audio signal just via an outer tap/terminal (T2) of the serially connected voice coils (7, 8).

A magnet system (100) for an electromechanical transducer has a first set (2) of magnets and a second set (4) of magnets. The first set (2) of magnets has a first, inner annular magnet (6) and a first outer, annular magnet (8), and the second set (4) of magnets has a second, inner annular magnet (10) and a second, outer annular magnet (12). The first, inner annular magnet (6) is arranged in the interior of the first outer annular magnet (8), and the second inner annular magnet (10) is arranged in the interior of the second outer annular magnet (12). The magnetic polarity in respect of the first, inner annular magnet (6), the first, outer annular magnet (8), the second, inner annular magnet (10), and of the second, outer annular magnet (12) has a direction (Y) corresponding to a direction perpendicular to the annular extension (X) of the magnets.