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| Number | Title | Issue Date |
| 8175320 | Single magnet coaxial loudspeaker A coaxial loudspeaker for reproducing an electrical sound signal is provided. The loudspeaker has a magnetic driver assembly with a first annular slot and an opposed, coaxial second annular slot, each establishing a permanent magnetic field therein from a single mag... | 05/08/2012 |
| 8073187 | Speaker and speaker apparatus A speaker capable of properly adjusting a spring characteristic with which a voice coil is driven and capable of being driven in large amplitude. When a position control coil wound around a bobbin is at a reference position, both ends of the coil cross a magnetic ga... | 12/06/2011 |
| 7873179 | Speaker The speaker according to the present invention comprises: a magnetic circuit; a diaphragm, a part of which is located in a magnetic gap formed in the magnetic circuit; a ring-shaped first voice coil formed on a first vibrating surface of the diaphragm; a ring-shaped... | 01/18/2011 |
| 7848536 | Voice coil assembly, loudspeaker using the same, and method for producing the same A voice coil assembly capable of realizing a flat thin loudspeaker having a high efficiency, reduced divided vibrations, a flat frequency response, and reduced operation defects. The voice coil assembly includes a plurality of internal-winding voice coils, each incl... | 12/07/2010 |
| 7684586 | Dual voice coil speaker A speaker includes a diaphragm having a principal vibration part and annular internal and external supports for supporting the principal vibration part, a large-diameter voice coil unit mounted at the outer edge of the principal vibration part, a small-diameter voic... | 03/23/2010 |
| 7551749 | Baffle vibration reducing An electro-acoustic transducer includes a magnet assembly having a first magnetic flux gap and a second magnetic flux gap. A first voice coil is positioned in the first magnetic flux gap. A first diaphragm is mechanically coupled to the first voice coil and to a fra... | 06/23/2009 |
| 7418108 | Transducer for tactile applications and apparatus incorporating transducers The disclosed transducer the can transfer an audio signal into a full-spectrum tactile wave over a frequency of 10 Hz-2 KHz. Upper and lower springs of the transducer produce vibrations via a coil/magnet in a manner similar to a conventional speaker, but the transdu... | 08/26/2008 |
| 7412071 | Low-inductance electromagnetic drive without driving the magnetic flux circuit The present invention relates to a low-inductance electromagnetic drive without driving magnetic flux circuit, which comprises a magnetic pole, a drive coil, an upper magnetic inductive board, a permanent magnet and a lower magnetic-inductive board. The magnetic pol... | 08/12/2008 |
| 7386137 | Sound transducer for solid surfaces A sound transducer (10) for imparting acoustical energy directly to a solid surface (12) while achieving the sound quality and frequency response found only in conventional diaphragm speakers. The sound transducer (10) comprises a pair of symmet... | 06/10/2008 |
| 7369674 | Acoustic apparatus An acoustic apparatus comprising a yoke, a main speaker mechanism disposed on a first surface of the yoke, and a sub speaker mechanism disposed on a second surface of the yoke opposite to the first surface and adjacent to the main speaker mechanism, the main speaker... | 05/06/2008 |
| 7324657 | Speaker apparatus A voice coil and a magnetic driving circuit oscillate a diaphragm and a center cap. A magnetic lighting circuit for providing a magnetic field to an induction coil is mounted separately from a magnetic driving circuit. The induction coil generates an electromotive f... | 01/29/2008 |
| 7324659 | Speaker and method of manufacturing the same A frame is provided with an opening allowing insertion of a jig for setting an inner rim of a suspension holder to a proper position. The jig ensures positive alignment of the suspension holder when making connection to the frame. The jig also ensures reliable bondi... | 01/29/2008 |
| 7319772 | Speaker device for improving mid/high-range frequencies A speaker device for improving mid/high-range frequencies includes a magnetic base, a frame annularly mounted to the magnetic base, a cone mounted to an inner side of the frame, a voice coil mounted to the cone and suspended in a gap of the magnetic base, and a dead... | 01/15/2008 |
| 7274798 | Speaker device A loudspeaker device 1 includes an acoustic diaphragm 5 composed of a domed diaphragm 11, an edge-like diaphragm 13, and a junctional flat portion 12 which joins those domed and edge-like diaphragms, and a joined portion 23 ... | 09/25/2007 |
| 7260229 | Position sensor for a loudspeaker The invention relates to an improved electro-dynamic loudspeaker. The electro-dynamic loudspeaker comprises (a) a voice coil for generating an acoustic waveform, the voice coil being longitudinally movable from an initial rest position to generate the acoustic wavef... | 08/21/2007 |
| 7254248 | One-magnet rectangular transducer An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap there between, the magnetic circuit comprising one magnet. The magnet can either be positioned in the center of the magne... | 08/07/2007 |
| 7245049 | Vibrator and method for manufacturing the same A vibrator of the present invention comprises a coreless coil (2), a driver (4) including a magnet (4a) inserted in the coreless coil (2), a yoke (4b) for pinching the coreless coil (2) and facing the magnet ( | 07/17/2007 |
| 7236607 | Loudspeaker with a first and a second diaphragm body A loudspeaker includes a frame, a diaphragm and an electric driving arrangement for moving the diaphragm along an axis with respect to the frame. The diaphragm includes an outer conical first diaphragm body and an inner conical second diaphragm body invertedly orien... | 06/26/2007 |
| 7231057 | Multi-function actuator capable of preventing vibration The present invention relates to a multi-function actuator, in which a voice coil vibrates a sound-generating diaphragm in response to an audio signal. A vibration coil is placed on a central axis coaxial with the voice coil for generating vibration in response to t... | 06/12/2007 |
| 7227970 | Shorting ring fixture for electromagnetic transducer An electromagnetic transducer such as an audio speaker, having a motor structure in which a shorting ring that sinks eddy currents also serves as a permanent fixture to provide coaxial alignment of two or more components within the transducer. These components could... | 06/05/2007 |
| 7221773 | Oval speaker apparatus and method of manufacturing the same An oval speaker apparatus includes a diaphragm whose outer peripheral shape in a plan view is oval or elliptical; an oval or elliptical voice coil for driving the diaphragm; an edge which is joined to an outer periphery of the diaphragm; and a frame to which an oute... | 05/22/2007 |
| 7209570 | Speaker A high efficiency loudspeaker without a damper is provided. The loudspeaker includes magnetic circuit having a magnetic gap and a voice coil member, which has movable coil, disposed in the magnetic gap of the magnetic circuit. The loudspeaker also includes a diaphra... | 04/24/2007 |
| 7194104 | Universal audio speaker connection block A speaker interconnection block with two voice coils to be driven with separate amplifiers, or to use one amplifier to drive the two voice coils in series or parallel without having to reinterconnect the voice coils. This is achieved by locating the negative voice c... | 03/20/2007 |
| 7194287 | Electric-mechanical-acoustic-transducer and portable communication device including the same An electric-mechanical-acoustic-transducer includes a diaphragm; a movable section; a driving section for generating a driving force for vibrating the diaphragm and the movable section; and a suppression section for suppressing a sharpness (Q factor) of a vibration ... | 03/20/2007 |
| 7181041 | Flat speaker of full-face driving Ring magnets (5) are concentrically placed with certain spacings (6) on a magnetic frame (4). The magnetic members on the magnets (5) are removed, and the magnets are arranged so that the polarities of adjacent magnets (5)are alter... | 02/20/2007 |
| 7152481 | Capacitive micromachined acoustic transducer A micromachined capacitive acoustic transducer including an electrode formed by a perforated plate and another electrode formed by a shallowly corrugated membrane anchored at one or more positions on the substrate which also supports the said perforated plate is des... | 12/26/2006 |
| 7146020 | Structure for the sound coil of loudspeaker An improved structure for the sound coil of loudspeaker comprises a cylinder provided with multiple layers of coils surrounding one end thereon. The coils are divided into sections in the middle position which provide more than two conducting wires. The cylinder is ... | 12/05/2006 |
| 7099489 | Twin magnetic loop multifunctional vibrator-speaker transducer The present invention relates to a multifunctional device, which is particularly applicable to a twin magnet loop (called TML) transducer with both vibrating and sound functions. The present invention integrates an inner and an outer magnet loop of TML into one devi... | 08/29/2006 |
| 7088827 | Reconfigurable speaker system A reconfigurable speaker system for producing sound in response to at least one of right and left channel audio signals generated by an audio source. The speaker system can be configured by the user to simultaneously reproduce right and left channel audio informatio... | 08/08/2006 |
| 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 having a drive coil is placed between these magnets. Thus, magnetic fl... | 08/01/2006 |
| 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. The EDMA includes a conductive ring between a first plate and a second ... | 06/06/2006 |
| 7050602 | Low capacitance receiver coil The disclosure relates to electroacoustic receivers of the type which incorporate a reed armature. Thus, a receiver comprises a coil, magnets, pole pieces and a reed armature which passes through a central tunnel defined by the coil. A central portion of the reed li... | 05/23/2006 |
| 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 signal or a low frequency vibration. By short-circuiting the terminal f... | 04/25/2006 |
| 7031488 | Super tweeter A super tweeter includes a magnetic base, a voice coil, a frame annularly mounted to the magnetic base, a central supporting member mounted on a central portion of the magnetic base, a diaphragm, an annular inner supporting member, and an annular outer supporting me... | 04/18/2006 |
| 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 is disposed close and parallel to a voice coil and attached to the inn... | 04/18/2006 |
| 7024014 | Multiple voice-coil cone-driver A multiple voice-coil cone-driver for driving a loudspeaker includes a first voice-coil, and a second voice-coil coupled in parallel to the first voice-coil. Together, the first and second voice-coils in parallel are characterized by a baseline frequency response wi... | 04/04/2006 |
| 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 relative to each other along the center of the EDMA. An annularly position... | 03/14/2006 |
| 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 resistant diaphragm (2) from which a voice coil (3) is pro... | 02/28/2006 |
| 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. The transducer has a push-pull geometry with at least two voice coils. ... | 02/28/2006 |
| 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 membrane part, whereby a meeting area is defined between the inner membr... | 12/27/2005 |
