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Class 381/412 - Magnetic circuit


Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter including a path of magnetic flux from north
No. of applications: 152
Last issue date: 05/03/2012


1        
Application No.Application TitleIssue Date
20120106775SPEAKER
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 cavi...
05/03/2012
20120106774SPEAKER, AND MOBILE ELECTRONIC DEVICE
A speaker and the like, which is capable of wideband reproduction by improving the bass characteristic, and which is suitable for size reduction, is provided.

A housing (110) includes one main surface (111) having a polygonal ...

05/03/2012
20120051581SPLIT 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, spli...
03/01/2012
20120033849SENSORY 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 t...
02/09/2012
20120002837SPEAKER 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 seco...
01/05/2012
20110293133SPEAKER
A speaker includes a yoke defining a receiving cavity therein, a first magnet received in the receiving cavity of the yoke, a second magnet received in the receiving cavity of the yoke and opposite to the first magnet, a first coil surrounding the first magnet, a second...
12/01/2011
20110293134SPEAKER
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 dia...
12/01/2011
20110261991SPEAKER 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 provi...
10/27/2011
20110235849SPEAKER 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 longe...
09/29/2011
20110222721CONNECTING 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. Th...
09/15/2011
20110211725LOUDSPEAKER AND ELECTRONIC DEVICE INCLUDING LOUDSPEAKER
There is provided an elongated loudspeaker having high sound quality that is unlikely to cause break-up resonances and is capable of obtaining flat frequency characteristics. The loudspeaker includes: an elongated flat-plate-shaped diaphragm; a frame having an opening p...
09/01/2011
20110207588EXERCISE DEVICE OF AN OSCILLATION TYPE
An exercise device of an oscillation type is provided having upper and lower panels, and a magnet mounted on the lower plate for generating a magnetic field. A middle ring is coupled to a lower side of the magnet, an outer ring is formed along circumference of the lower...
08/25/2011
20110182463ULTRA-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 magn...
07/28/2011
20110176703SPEAKER 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 vibrat...
07/21/2011
20110164781MAGNETIC CIRCUIT FOR SPEAKER DEVICE AND SPEAKER DEVICE
A speaker device includes a diaphragm (2), frame (3) vibratably supporting the diaphragm (2) in the vibration direction, and a driving part (4) provided at the frame (3), applying vibration to the diaphragm (2) in response to an...
07/07/2011
20110164764DIAPHRAGM FOR SPEAKER, SPEAKER USING THE DIAPHRAGM, ELECTRONIC DEVICE USING THE SPEAKER, AND SPEAKER-MOUNTED DEVICE
A speaker diaphragm containing resin and carbonized bamboo material with a large degree of flexibility in setting physical properties, moisture-proof reliability and strength secured, superior appearance, and productivity and dimensional stability increased, which allow...
07/07/2011
20110150264SPEAKER MAGNETIC CIRCUIT, SPEAKER DEVICE, AND METHOD OF MANUFACTURING SPEAKER MAGNETIC CIRCUIT
The present invention is to provide a speaker magnetic circuit which, even if small in its thickness, can reduce an occurrence of magnetic flux leakage so as to obtain a sufficient magnetic flux density in a magnetic gap, particularly in a position where a voice coil is...
06/23/2011
20110135141SPEAKER DEVICE
A speaker device has a magnet, outer yokes, and inner yokes which are assembled so that a magnetic gap is formed between the outer yoke and inner yokes over which a magnetic flux which is generated from the magnet cuts across. A voice coil unit which is linked to a diap...
06/09/2011
20110135111SPEAKER DEVICE AND AUTOMOBILE
A speaker device is provided, in which the rolling of a voice coil and the contact of the voice coil with a magnetic circuit are reduced. The speaker device includes a vibrating body 4, a magnetic circuit 3, and a frame 2 that supports the vibrating...
06/09/2011
20110123061ELECTROACOUSTIC TRANSDUCING DEVICE
A yoke-integral frame is formed by a simple pressing process, and the numbers of components and production steps of an electroacoustic transducing device are reduced, thereby improving the productivity.

In an electroacoustic transducing dev...

05/26/2011
20110116658FINE NATURAL FIBER AND SPEAKER DIAPHRAGM COATED WITH FINE NATURAL FIBER
Natural fiber is beaten with a biaxial kneading machine. The beaten natural fiber is processed finely with a bead mill so as to allow the processed natural fiber to have a BET specific surface area not smaller than 1 m2/g. This method provides fine fiber in a...
05/19/2011
20110116650SPEAKER DEVICE
A speaker device includes a diaphragm, a frame supporting the diaphragm vibratably along a vibration direction, and a driving part disposed in proximity of the frame and vibrating the diaphragm corresponding to an audio signal. The driving part includes a magnetic circu...
05/19/2011
20110110554LOW 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 in...
05/12/2011
20110051987MULTI-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 a...
03/03/2011
20110051988SPEAKER 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 di...
03/03/2011
20110026757ACOUSTIC CONVERTER DIAPHRAGM, AND ACOUSTIC CONVERTER
A diaphragm for acoustic converter includes a base and a damping layer formed on one surface or both surfaces of the base. The damping layer includes a particle having a heat dissipating function, and has detachability with respect to the base....
02/03/2011
20110019864SPEAKER
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...
01/27/2011
20100322460MAGNETIC CIRCUIT AND AUDIO EQUIPMENT
[Problem] To provide a magnetic circuit whose size and thickness can be reduced, and which can generate a high sound pressure by a simple structure.

[Means for Resolution] A magnetic circuit of the present invention includes a horizontal co...

12/23/2010
20100310111LOUDSPEAKER 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 magnet...
12/09/2010
20100290662STRAY 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 ...
11/18/2010
20100278372MEMS 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....
11/04/2010
20100220889ACOUSTIC 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 outsi...
09/02/2010
20100208934SPEAKER DEVICE
Objects are to make a speaker device smaller than heretofore in size, in profile, and in weight, and to reproduce sound in high quality. The speaker device includes: a diaphragm which has an inner rim connected to a voice coil bobbin and an outer rim connected to a fram...
08/19/2010
20100128891REPULSION-TYPE MAGNETIC CIRCUIT AND SPEAKER DEVICE
A repulsive-type magnetic circuit prevents deterioration of magnetic characteristic of magnets due to heat accumulation, and includes: a magnet and plural magnets arranged such that matching poles of the magnet and each of the plural magnets confront each other; a yoke;...
05/27/2010
20100119101Integrated Audiovisual Output Device
An integrated audiovisual output device includes at least one display comprising at least one panel, at least one voice coil contiguous with the at least one panel, and at least one magnet proximate to the at least one voice coil, wherein the at least one panel is vibra...
05/13/2010
20100104115MICRO MAGNETIC SPEAKER DEVICE WITH BALANCED MEMBRANE
A micro magnetic device with a micro magnetic speaker unit having a first element, a second element, and a membrane therebetween. Each of the elements comprises a body, a pole of soft magnetic material, an electrically conductive coil positioned around the pole, and a p...
04/29/2010
20100034419SPEAKER
There is provided a speaker, in which a space surrounded by the drive cone, the diaphragm, and the frame is sealed, to prevent the sound quality from changing, and prevent an edge unit from being broken in particular with a large sound volume.

02/11/2010

20100034418HIGH PERFORMANCE MICRO SPEAKER
A micro speaker having a first core assembly and a second core assembly, with a diaphragm between the first and second core assemblies. Each of the core assemblies includes a housing with a pole and a cover plate, and a permanent magnet within the housing. At least one ...
02/11/2010
20100027833SPEAKER UNIT
In the speaker device, a casing and a magnetic circuit are arranged to confront each other, and a vibration body is arranged between them. The outer circumferential part of the vibration body is supported by the casing. A supporting member passes through the inside of t...
02/04/2010
20100002901SPEAKER
A speaker having improved sound quality by reducing a phase difference and also having an outstanding outward appearance is provided. In a speaker comprising a vibrating element 10, a drive unit 20 for vibrating the vibrating element 10, and a frame...
01/07/2010
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