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7120270 |
Audio device heat transferring
An acoustic device having a heat producing device, such as an amplifier and a heat sink for transferring heat from the amplifier. The acoustic device has a cone having an inner surface, and a...
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7120271 |
Internal magnetic circuit and loudspeaker system incorporating the same
An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A...
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7106881 |
Speaker
A speaker 300 is formed using a plate such as a mobile phone display window 310 as a vibrating element. At least two dynamic actuators 950 are positioned behind the edges of the window 310 ...
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7106879 |
Loudspeaker
In a loudspeaker, even if an interval between a diaphragm and a yoke is small, a lead wire, an end of the coil wire of a voice coil, moves upward and downward in and/or over a cutout portion formed...
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7103195 |
Speaker unit
There is provided a speaker unit comprising: an elliptical vibrating diaphragm; a cylindrical voice coil secured at one end thereof on the center of the elliptical vibrating diaphragm; a frame...
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7085394 |
Electro-acoustic transducer and electronic device
A first magnet is provided in an upper case and a second magnet is provided in a lower case so that these magnets face each other. These magnets are magnetized in opposite directions. A diaphragm...
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7082208 |
Speaker assembly having plural drivers
A weight is attached to the rear side of a magnetic circuit of a speaker unit. The tip of a boss that projects to the front side from the weight is joined to the rear side of a center pole of the...
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7068807 |
Speaker device
To realize a speaker device capable of significantly improving sound quality with a simple construction. The speaker device applies electromagnetic force to a voice coil based on a supplied audio...
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7065225 |
Electromagnetic transducer having a low reluctance return path
An electromagnetic transducer, such as an audio speaker, includes a return path member which is a pole piece for external magnet geometries or a cup for internal magnet geometries. The magnetic...
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7062062 |
Electromagnetic sound producing device
An electromagnetic sound producing device has a yoke, a coil, a permanent magnet, and a diaphragm provided in a case. The permanent magnet is made of SmFeN-base isotropy plastic magnetic material.
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7057314 |
Electromagnetic motor system capable of removing heat away from its magnetic gap
An electromagnetic drive motor assembly (EDMA) has at least one bridge that extends along a radial direction to conduct heat away from the magnetic gap and towards the outer surface of the EDMA....
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7058195 |
Speaker assembly
An electromagnetic transducer is described including a magnet assembly ( 50 ) and a conductive drive coil ( 52 ). The magnet assembly provides an emanating magnetic field within which the drive...
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7039213 |
Speaker driver
An electro-mechanical transducer, including a magnetic assembly producing a magnetic field having two or more displaced regions of greater intensity, having magnetic flux in substantially similar...
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7035424 |
Loudspeaker having an inner lead wire system and related method of protecting the lead wires
A loudspeaker for generating sound from an electrical current provided by an external source may include an adapter and/or a guide for supporting, directing and routing lead wires carrying the...
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7035423 |
Mobile terminal with electromagnetic actuator
This invention deals with a portable terminal that reduces extraneous tones in a portable terminal in which is mounted an electromagnetic induction actuator that produces voice signals, a buzzer...
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7031489 |
Magnetic circuit for speaker with short-circuiting ring
A magnetic circuit for a speaker comprises: a bottom yoke including a center pole; a ring magnet; a top plate; and a short-circuiting ring shaped like a hollow cylinder. The short-circuiting ring...
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7024015 |
Speaker and method of manufacturing the speaker
The speaker disclosed in this invention comprises: (a) a central cap fixed on voice coil bobbin; (b) a shaft fixed in the center of the central cap; and (c) a bearing filled with lubricating fluid...
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7016514 |
Loudspeaker assembly
A loudspeaker assembly includes a chassis, a magnet assembly supported by the chassis and disposed at a rear side thereof, a moveable voice coil, a rear suspension, and a diaphragm connected to the...
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7016515 |
Speaker apparatus
In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfied
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7012345 |
Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed...
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7006653 |
Compact high performance speaker
A speaker has an annular magnet structure. First and second annular magnets are arranged concentrically with each other and connected by a shunt at one end and a pole-defining structure at the...
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7006654 |
Push-pull electromagnetic transducer with increased Xmax
An electromagnetic transducer such as an audio speaker, having an improved geometry in the positioning of its voice coils relative to its magnetic air gaps, facilitating a greater linear travel....
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7006651 |
Speaker
A small and high-performance waterproof speaker which can be manufactured inexpensively by decreasing the number of components. Front face of a case ( 1 ) is sealed hermetically by a water...
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7003130 |
Resonance frequency correction method and vibration speaker
A method of correcting a resonance frequency in a vibration speaker generating acoustic sound and vibration includes adjusting the actual resonance frequency to a higher resonance frequency by...
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6996247 |
Push-push multiple magnetic air gap transducer
An electromagnetic transducer such as an audio speaker, having a push-push geometry in which there are two or more air gaps and the magnetic flux across the air gaps is in the same orientation. If...
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6993147 |
Low cost broad range loudspeaker and system
A loudspeaker has a diaphragm with a voice coil disposed about its perimeter and extending in a gap into which the flux of an annular rare earth magnet is focused. An opening behind the diaphragm...
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6980664 |
Double-dome speaker
A loudspeaker comprising a moving coil and a membrane fastened to a chassis, where the membrane is divided into a concentrically disposed inner membrane part and a concentrically disposed outer...
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6975741 |
Electroacoustic transducer being acoustical tight in the area of its air gap for its moving coil
A transducer ( 1 ) includes a transducer axis ( 2 ), a membrane ( 3 ), a magnet system ( 6 ) having an outer magnet system part ( 7 ) and an inner magnet system part ( 8 ), a moving coil...
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6973194 |
Speaker
A speaker includes: a frame; a magnetic circuit fixed to the frame; a diaphragm fixed to the frame so as to be capable of vibrating in a predetermined direction; a driving force transmitting member...
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6944306 |
Harmonic amplifier and corresponding electro-acoustic transducer
A method of reproducing audio sound using low level electromagnetism applied to ambient air particles to create a new magnetic field. The method uses a device having at least one winding of...
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6934402 |
Planar-magnetic speakers with secondary magnetic structure
A planar magnetic transducer having enhanced magnetic structures which increases performance over a single-ended device but mitigates some of the drawbacks of double ended devices, including a...
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6917690 |
Electromagnetic transducer having multiple magnetic air gaps whose magnetic flux is in a same direction
An electromagnetic transducer such as an audio speaker exhibiting highly linear performance over a greatly extended excursion. The motor structure includes a stack of two or more magnet and plate...
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6914998 |
Speaker apparatus
A speaker arrangement in which a diaphragm does not displace in directions other than a regular oscillating direction. The speaker arrangement includes a magnetic circuit having a magnetic gap, a...
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6912292 |
Concentric co-planar multiband electro-acoustic converter
A compound loudspeaker drive unit comprising a first drive unit and a second drive unit arranged co-axial with respect to the center axis of the loudspeaker, and each drive unit comprises permanent...
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6895099 |
Compact speaker for portable phone
A speaker for a portable phone capable of being assembled without bonding by adhesives is disclosed. The speaker has a protector having a plurality of sound holes, and having an annular tension...
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6879700 |
Speaker and its production method of the same
A speaker and its production method in which productivity can be enhanced and characteristics can be easily improved. A frame 14 of a speaker 10 is divided into a first frame body 15 and a...
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6870285 |
Long stroke linear voice coil actuator with the proportional solenoid type characteristic
A voice coil actuator is disclosed which provides a proportional solenoid type characteristic and in which first and second magnets are positioned at different ends of a first soft magnetic pole...
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6868165 |
Loudspeaker
A loudspeaker has a magnetic flux assembly that has a pole piece and a plate and magnet structure for co-operating with a voice coil. The plate structure includes a top plate which is mounted...
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6865282 |
Loudspeaker suspension for achieving very long excursion
An electromagnetic transducer such as an audio speaker employs a slotted yoke and two suspension components enabling very large excursion relative to the size of the diaphragm which results in...
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6859544 |
Magnetic circuit for speaker, method of manufacture thereof, and speaker using same
A magnetic circuit for a speaker comprises: a bonded magnet shaped rectangular in top plan view, having on its top face a plurality of grooves formed to extend all the way along two opposing sides...
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6847726 |
Shorting rings in dual-coil dual-gap loudspeaker drivers
Loudspeaker and other transducers of the dual-voice-coil/dual-magnetic-gap type can be improved by the addition of one or more annular shorting rings strategically located in the vicinity of the...
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6842529 |
Speaker
A loudspeaker includes a bobbin, a coil, a magnetic circuit having a magnetic gap, a first cylinder fixed to the outer surface of the bobbin, a second cylinder connected with the first cylinder, a...
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6836551 |
Loudspeaker
A loudspeaker includes: a bottom plate; a center pole provided upwardly from the bottom plate; a yoke surrounding the center pole and having a plurality of slits; a magnet for providing a magnetic...
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6829366 |
Magnetic circuit and loudspeaker using the same
A magnetic circuit includes an annular magnet magnetized in the axial direction thereof; an annular stacked plate disposed on the magnet and including first and second annular plates; and a yoke...
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6807282 |
Electromagnetic induction type actuator device and mounting structure therefor and pda(personal digital assistant)
There is a terminal block with leaf spring metal terminals that extend downward from a housing on the side opposite the open end of the housing in which a diaphragm is fitted and fixed, and an...
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6795563 |
Speaker for an electronic instrument
A speaker has a frame provided with a yoke, a magnet, a vibrating plate and a voice coil, and a pair of leads. An end of each of the leads is connected to an end of the coil and the other end...
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6792126 |
Information processing device and speaker unit applicable thereto
An information processing device and a speaker unit applicable to the device. In one aspect of the present invention, the device includes a housing, a pole piece, a voice coil, a magnet, and a...
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6788799 |
Speaker device and associated method for manufacturing the speaker device
A speaker device and associated method for producing a speaker device that includes a voice coil and a radiant layer made of a radiant energy emissive material provided on a surface of the voice...
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6771791 |
Air pump speaker
An improved speaker having a modified front plate with air intake apertures, a vented frame, and a voice coil supported by a diaphragm constructed of gas impermeable material connected at one end...
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6771792 |
Track-shaped loudspeaker
An elongated oval track-shaped loudspeaker has a diaphragm of a track-shape having major and minor axes, and a pole piece of an elongated oval shape and disposed to conform its major axis to that...
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