A loudspeaker is disclosed. The loudspeaker includes a magnetic circuit system including a first magnetic part, a second magnetic part surrounding the first magnetic part, and a magnetic gap formed by the first and second magnetic parts. At least one of the first and second magnetic parts is a magnet. The first magnetic part includes a body and an avoiding part formed surrounding an edge of the body.

An electromagnetic transducer, such as an audio speaker, having a voicecoil disposed within a magnetic gap between a pair of magnetic arrays, e.g., Halbach arrays, is disclosed. In an example, the paired Halbach arrays include vertically-poled magnets to direct magnetic flux across the magnetic gap orthogonal to electrical current carried by a planar winding of the voicecoil. Accordingly, a Lorentz force may drive an oscillational mass, e.g., a speaker diaphragm, in a longitudinal direction orthogonal to the magnetic flux and the electrical current to generate vibration or sound. Other embodiments are also described and claimed.

A loudspeaker using a semiconductor voice coil includes a vibrating assembly and a magnetic force assembly. The magnetic force assembly and the vibrating assembly are arranged at an interval. The vibrating component includes a diaphragm and the semiconductor voice coil. The semiconductor voice coil is arranged on a side of the diaphragm. The magnetic force assembly and the semiconductor voice coil are arranged on the same side of the diaphragm. A magnetic gap is defined in the magnetic force assembly. The semiconductor voice coil is arranged in the magnetic gap. The magnetic field lines in the magnetic gap are perpendicular to the direction of current in the semiconductor voice coil. An electronic device including the loudspeaker is also disclosed.

Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

In one embodiment, there is described a new transducer, and in particular an improved system and method for producing linear motion for a transducer such as used in voice coils converting from an electrical input to a mechanical linear motion input.

An electric motor including a driven element, a magnet assembly and a driving element. The driven element being driven in a direction of movement. The magnet assembly is includes first and second magnets each having first and second magnetic poles. The first magnetic pole of the first magnet and the first magnetic pole of the second magnet being proximate to each other and facing each other thereby defining a first magnetic zone therebetween. The first magnetic poles all being similar, and the second magnetic poles all being similar. The driving element is proximate to the magnet assembly, producing a magnetic field within the driving element that is primarily orthogonal to the direction of movement.

An electronic device is provided. The electronic device includes a housing including a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a side member configured to enclose at least a portion of a space between the first surface and the second surface, a first electronic component positioned inside the housing and comprising magnets disposed to emit a magnetic flux in the first direction or the second direction, a second electronic component positioned inside the housing and comprising at least one magnet disposed to emit a magnetic flux in the first direction or the second direction and being disposed beside one side surface of the first electronic component in a substantially vertical direction to the first direction or the second direction, and a shield structure disposed between the first electronic component and the second electronic component.

A loudspeaker includes a magnet, a T-yoke, a frame, a top plate, a voice coil, a damper, a dust cap, a cone paper, and a gasket. The cone paper being provided with a surround, the gasket being located below the outer edge of the frame, the magnet being located above said T-yoke. A magnetic gap is formed between the top plate and the T-yoke. The voice coil being arranged in the magnetic gap, the voice coil including VC wire part and VC tube part. The top plate being provided with a riveted groove on the outer side, the top plate being riveting mounted in the frame via the riveted groove.

An electronic device is disclosed that may include a housing including a first surface facing in a first direction, a second surface facing in a second direction, and a third surface, the first and second direction being generally opposed to one another, the third surface being positioned between the first and second surfaces and being generally orthogonal relative to the first and second directions; at least one speaker arranged in at least a part of the housing; and a speaker enclosure protecting the speaker. The speaker enclosure may include an upper speaker enclosure arranged to face the first surface; and a lower speaker enclosure arranged to face the second surface, and confronting the upper speaker enclosure. Each of the upper and lower speaker enclosures may be at least partially made with magnetic materials that shield a magnetic flux generated in the speaker.

A wiring structure is provided for an electroacoustic transducer directly converting digital signals from a single sound source to sound waves without conversion to analog signals. The structure includes a diaphragm, and a plurality of voice coils fixed to the diaphragm. The voice coils are connected to respective cables each consisting of a stranded pair of positive and negative input lines.