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Electrical Audio Signal Processing Systems And Devices > Electro-acoustic Audio Transducer > Electromagnetic (e.g., Dyynamic) > Magnetic Circuit

Magnetic Circuit

Magnetic Circuit patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

02/27/14 - 20140056467 - Loudspeaker and electronic equipment including the loudspeaker
Provided is a loudspeaker having a thin long structure, and the loudspeaker includes: a frame; a diaphragm having a hollow structure and in which a shape of a plane that is perpendicular to a vibration direction is an oblong shape having a long side and a short side; an edge...

01/23/14 - 20140023224 - Speaker
A speaker includes a holder having a receiving cavity and an acoustic hole communicating with the receiving cavity, a magnetic circuit system received in the receiving cavity of the holder, and a guiding portion attached on the holder. Wherein at least a part of the guiding portion is exposed from...

12/19/13 - 20130336518 - Loudspeaker, electronic apparatus using same, and mobile apparatus
A loudspeaker includes a back panel and a plurality of thin loudspeakers mounted onto the back panel. The back panel has an aspect ratio of 6 or higher, and has a wiring unit formed thereon and wire-connecting the thin loudspeakers. The thin loudspeakers are arranged on the back panel in...

11/28/13 - 20130315435 - Speaker edge, method for manufacturing same and speaker
A speaker edge includes a resin layer including a resin member and a fiber layer including a tangled fiber body. A melting temperature of the tangled fiber body is higher than a melting temperature of the resin member. The hardness of the tangled fiber body is lower than the hardness...

11/14/13 - 20130301867 - Loudspeaker resin molding component and loudspeaker using the same and electronic device and mobile apparatus using the loudspeaker
A loudspeaker resin molding component includes resin and bamboo fibers refined to have a microfibril status and carbonized. By this configuration, such a loudspeaker resin molding component can achieve both of a high elastic modulus and a large internal loss....

10/31/13 - 20130287246 - Frame for speaker, speaker using same, and electronic apparatus and mobile device using speaker
A connector housing made of resin includes a hole through which an eyelet terminal is inserted, a first wall for regulating a position of the eyelet terminal in an inserting direction of the eyelet terminal, and a second wall for regulating the position of the eyelet terminal in a direction...

10/24/13 - 20130279737 - Micro-speaker
A micro-speaker includes a yoke, a magnet assembly attached to the yoke, a voice coil, and a diaphragm connected with the voice coil. The yoke defines a bottom wall, and a number of sidewalls extending upwards from the bottom wall. The magnet assembly includes a main magnet positioned on the...

10/17/13 - 20130272564 - Receiver with a non-uniform shaped housing
A balanced armature receiver includes a magnet, a coil, and a housing. The magnet and the coil are disposed within the housing and the housing comprising a bottom surface. The bottom surface includes a first bottom portion with a first dimension and a second bottom portion with a second dimension....

10/03/13 - 20130259289 - Micro-speaker
A micro-speaker includes a case having a cavity and a receiving hole, a magnetic circuit unit and a vibrating unit with a voice coil received in the cavity, a pair of needle seats embedded in the case for electrically connecting with the voice coil, a pair of pogo-pins arranged in...

10/03/13 - 20130259290 - Micro-speaker
Disclosed is a micro-speaker. The micro-speaker includes a frame, a magnetic circuit unit assembled with the frame, a diaphragm extending along a longitudinal direction, a coil, an elastic member and an FPC. The diaphragm includes a top plate and a periphery portion surrounding the top plate. The top plate includes...

08/22/13 - 20130216088 - Acoustic molded article, speaker using same, and electronic equipment and mobile apparatus using speaker
An acoustic molded article, such as a frame for a speaker, used for an acoustic instrument, includes a regenerated glass and a regenerated resin both collected from household electric appliances which have been incinerated as fuel, or used for reclamation to be discarded. Thus, this article is an environment-friendly acoustic...

07/18/13 - 20130182885 - Electrodynamic speaker and method for manufacturing the same
A frame of the electrodynamic speaker includes an edge mounting section, a magnetic circuit mounting section, a coupling section for coupling the edge mounting section and the magnetic circuit mounting section so as to define a plurality of window sections, a terminal fixing section for fixing a terminal, and at...

04/04/13 - 20130083958 - Heat dissipating acoustic transducer with mounting means
The inertial transducer comprises a foot, a modular key, at least one suspension means having at least three contact points, and heat dissipation means comprising multiple heat transfer points. The foot alternatively includes an opening or a cap. The cap may be frangible. Preferably, the foot includes a cylindrical wall...

03/28/13 - 20130077816 - Inductive electroacoustic transducer
An inductive electroacoustic transducer which includes a yoke, a magnetic circuit system disposing in the yoke, a vibration membrane which is driven by the magnetic circuit system, a cover coupled on one side of the yoke and it has a plurality of sound holes, and a circuit board which has...

03/21/13 - 20130070955 - Loudspeaker with interlocking magnet structure
A loudspeaker having a magnet system and a method of assembling the magnet system are disclosed. The magnet system comprises a magnet and an armature core that is mounted on the magnet. The magnet system also includes a shell pot configured to receive the magnet and the armature core in...

03/14/13 - 20130064414 - Coaxial speaker system having a compression chamber
Coaxial two-way or more loudspeaker system comprising a low range electro-dynamic transducer and a high range transducer with compression chamber, mounted in a coaxial and frontal with respect of the low range transducer....

02/14/13 - 20130039529 - Speaker
In configuring a magnetic circuit, by forming polarities of a magnet to be aligned along a vertical direction, and by optimizing a yoke providing a flow path of a magnetic flux, a vibration system is formed inside a magnetic circuit, so that a height of a speaker can be remarkably...

01/10/13 - 20130011000 - Speaker
A speaker of the present invention is used for converting audio electrical signals to audible sounds. The multi-magnetic circuit speaker includes a box with a sound hole, at least one magnetic circuit having at least two magnetic gaps, at least two vibrating units corresponding to the magnetic gaps, respectively, at...

12/13/12 - 20120314898 - High efficient miniature electro-acoustic transducer with reduced dimensions
A magnetic circuit includes an inner permanent magnet assembly and an outer permanent magnet assembly, a magnetically permeable yoke, and first and second air gap portions conducting first and second magnetic flux densities, respectively, the first and second air gap portions being adapted to receive first and second voice coil...

12/06/12 - 20120308070 - Slim type speaker and magnetic circuit therefor
A magnetic circuit and a speaker including the magnetic circuit. The speaker includes: a bottom case; a magnetic circuit including a perpendicular-magnetized permanent magnet and a horizontal-magnetized permanent magnet spaced apart from each other by a predetermined interval; a diaphragm; a voice coil attached on a surface of the diaphragm,...

10/04/12 - 20120250930 - Speaker diaphragm and speaker using same, and electronic equipment and device using said speaker, and speaker diaphragm manufacturing method
A diaphragm is formed of paper manufactured from a first fiber material and a second fiber material. The first fiber material is beaten to have a given freeness, and the second fiber material is made by carbonizing bamboo fiber that has been fibrillated into a microfibril state. This structure allows...

07/12/12 - 20120177247 - Electromagnetic transducer
A multifunctional electromagnetic transducer includes a bracket, a vibrating unit including a magnetic circuit part receiving in the bracket, and a plurality of helical wound springs assembled to the bracket for sustaining the magnetic circuit part. The magnetic circuit part defines a pole plate, a first magnet disposed at a...

07/05/12 - 20120170792 - Multifunctional vibrator
A multifunctional vibrator includes a frame, a vibrating unit receiving in the frame and including a magnetic circuit part with a magnetic gap, a plurality of elastic members connecting the vibrating unit and the frame, and a voice coil partially inserted into the magnetic gap. Each elastic member includes a...

07/05/12 - 20120170793 - Micro-speaker
A micro-speaker includes a yoke, a magnet assembly attached to the yoke, a voice coil, and a diaphragm connected with the voice coil. The yoke defines a bottom wall, and a number of sidewalls extending upwardly from the bottom wall. The magnet assembly includes a main magnet positioned on the...

06/21/12 - 20120155696 - Micro-speaker
A micro-speaker includes a frame, a yoke, a magnet, a diaphragm, and a voice coil. The yoke includes a base wall and a plurality of sidewalls defining a number of flat walls and a number of curved walls disposed at corners of the yoke. The flat walls define a number...

06/21/12 - 20120155697 - Electromagnetic transducer
An electromagnetic transducer includes a frame, a diaphragm including a top plate and a periphery portion surrounding the top portion and attached to the frame, a magnetic circuit part receiving in the frame with a magnetic gap, a voice coil partially inserted into the magnetic gap for driving the diaphragm,...

06/07/12 - 20120140977 - Speaker unit
A speaker unit includes a frame that secures a diaphragm of a speaker at an outer circumference of the diaphragm, a magnetic circuit, a first leg that extends from a portion of an inner wall of the frame in a vicinity of a front of the speaker to the magnetic...

05/10/12 - 20120114165 - Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker
A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made...

05/03/12 - 20120106774 - Speaker, and mobile electronic device
A housing (110) includes one main surface (111) having a polygonal shape, and an opening portion (112) in the one main surface. A diaphragm (120) is disposed in the opening portion so as to cover the one main surface, except for corner regions (115a, 115b, 115c, and 115d) which are...

05/03/12 - 20120106775 - Speaker
A speaker includes a base defining a pair of receiving cavities separated from each other in a longitudinal direction and an engaging portion disposed between the pair of receiving cavities, a pair of magnetic circuit systems received into the pair of the receiving cavities, a diaphragm attached on the base,...

03/01/12 - 20120051581 - Split magnet loudspeaker
A loudspeaker can provide magnetic flux from polarity-aligned split magnets to drive voice coils and generate sound. The loudspeaker may have reduced stray magnetic fields and a BL curve with symmetric and linear characteristics. The loudspeaker can include a core, split magnets, a magnet housing, a core cap, and a...

02/09/12 - 20120033849 - Sensory signal output apparatus
A sensory signal output apparatus is provided. The sensory signal output apparatus, includes: a magnetic circuit vibrating in response to an alternating signal flowing through a coil; and an elastic support means elastically supporting the magnetic circuit to surround the circumferential outer surface of the magnetic circuit from one side...

01/05/12 - 20120002837 - Speaker and method of assembling same
There is provided a speaker which has a frame structure divided into a first frame and a second frame, wherein tinsel wires are arranged so as not to overlap, with respect to the plane direction, the second frame to which a magnetic circuit is attached, whereby the second frame can...

12/01/11 - 20110293134 - Speaker
A speaker having a voice coil is disclosed. The voice coil includes two parallel main members and two linking members connecting the two main members for forming a closed loop, one of the linking member having at least a first part from a first circle having a first diameter, and...

10/27/11 - 20110261991 - Speaker device
A speaker device, wherein vibration of a magnetic circuit section is suppressed with a magnetic influence on the magnetic circuit section suppressed. A speaker device having a vibration section and generating an audio sound by vibration of the vibration section is provided with a magnetic section for forming a magnetic...

09/29/11 - 20110235849 - Speaker and electronic device including the same
A speaker includes a diaphragm 11, edges 12, at least one voice coil bobbin 14, a voice coil 15, and a magnetic circuit 21. The diaphragm 11 is a long flat plate. The edges 12 at ends of the diaphragm 11 in a longer-side direction support the diaphragm 11 to...

09/15/11 - 20110222721 - Connecting member for speaker and speaker
A connecting member for speaker purpose, which is prevented from peeling easily from both a voice coil support and a vibrating body, and a speaker having the connecting member are provided. The speaker 1 includes a frame 4 and a vibrating unit 3. The vibrating unit 3 includes a drive...

07/28/11 - 20110182463 - Ultra-thin loudspeaker
An ultra-thin loudspeaker including: a) an iron basin having a first receiving portion and a second receiving portion at the top surface thereof; b) a magnet unit positioned within the first receiving portion of the iron basin; c) a voice coil positioned around the magnet unit; and d) a vibrating...

07/21/11 - 20110176703 - Speaker device
A speaker device includes a speaker unit and a cabinet on or in which the speaker unit is mounted. The speaker unit includes a diaphragm, a static part supporting the diaphragm vibratably in a vibration direction, and a driving part provided at the static part to vibrate the diaphragm in...

05/26/11 - 20110123061 - Electroacoustic transducing device
In an electroacoustic transducing device having: a magnetic circuit 13 having a yoke, a magnet 11, and a pole piece 12; a vibration system 16 having a diaphragm 14 and a voice coil 15; and a frame 1 which holds the magnetic circuit 13 and the vibration system 16, the...

05/12/11 - 20110110554 - Low profile greeting card speaker
A low profile miniature speaker configured for use in greeting cards such as sound generating greeting cards and other novelties. The thickness of the speaker is minimized while maintaining the sound quality and increasing strength. The speaker magnet is counter-sunk into the housing of the speaker, thereby decreasing overall thickness....

03/03/11 - 20110051987 - Multi-function vibration actuator
A multifunction oscillatory actuator which performs acoustic reproduction by an acoustic reproduction section includes a diaphragm having a voice coil attached thereto and performs the occurrence of somesthetic oscillation by a magnetic circuit section having a magnet attached thereto, and in which the acoustic reproduction section and the magnetic circuit...

03/03/11 - 20110051988 - Speaker device
A speaker device includes a pair of diaphragms disposed opposite each other, a frame configured to vibratably support an outer periphery of the diaphragms in the vibration direction, and a plurality of driving parts configured to support a rear surface of each of the diaphragms and vibrate the diaphragms in...

01/27/11 - 20110019864 - Speaker
A loudspeaker includes a frame coupled to a magnetic circuit, a cone diaphragm coupled to an outer periphery of the frame, a voice coil coupled to the cone diaphragm, the voice coil having a portion placed in a magnetic gap of the magnetic circuit, a tubular port having an end...

12/23/10 - 20100322460 - Magnetic circuit and audio equipment
[Means for Resolution] A magnetic circuit of the present invention includes a horizontal coil wound in a horizontal direction, and an unitary magnet opposed face-to-face to the horizontal coil, wherein the magnet has a first polarity portion and a second polarity portion located adjacent to the first polarity portion. The...

12/09/10 - 20100310111 - Loudspeaker having an interlocking magnet structure
A magnet structure for use with a loudspeaker has an interlocking mechanism. The magnet structure can include a magnet, a shell pot and at least one core cap. The shell pot can contain the magnet in its hollow interior. The magnet can be a single magnet or double magnets. The...

11/18/10 - 20100290662 - Stray capacitance reduced condenser microphone
A condenser microphone includes a conductive layer which is partially disposed on an insulation ring of a second base to reduce stray capacitance. The condenser microphone includes: a conductive case with an opened surface, wherein an end portion of the case is bent to attach to a printed circuit board...

11/04/10 - 20100278372 - Mems microphone with spring suspended backplate
A MEMS microphone has a base, a backplate, and a backplate spring suspending the backplate from the base. The microphone also has a diaphragm forming a variable capacitor with the backplate....

09/02/10 - 20100220889 - Acoustic transducer
An acoustic transducer includes a sound-producing member at least partially disposed within the first magnetic flux gap region between the magnetic poles, the sound-producing assemblage is magnetically excited through a magnetic circuit that passes from a location outside the magnetic flux gap region to inside the magnetic flux region through...

02/11/10 - 20100034419 - Speaker
A speaker 1 includes: a frame 4; a magnetic circuit 2; and a vibrating unit 3. The magnetic circuit 2 is attached to the frame 4. The vibrating unit 3 is received in the frame 4, and includes a drive cone 14 and a diaphragm 15 vibrated by the magnetic...

12/10/09 - 20090304223 - Speaker, yoke thereof and method for manufacturing yoke
A speaker includes a frame, a diaphragm, a cover, a magnetic device, and a voice coil. The cover and the diaphragm are both disposed on a first side of the frame, and the cover covers the diaphragm. The magnet device is disposed on a second side of the frame. The...

12/10/09 - 20090304224 - Voice coil device and speaker device using the voice coil device
An example speaker device includes a vibration system having a frame, first and second voice coils, a voice coil bobbin, a diaphragm and a magnetic circuit holder, and a magnetic circuit system having a yoke, a magnet and first and second plates. The first and second voice coils are wound...