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| Number | Title | Issue Date |
| 8111870 | Electrodynamic transducer and use thereof in loudspeakers and geophones An electrodynamic transducer includes a frame and contains at least one electric coil which is placed in a static magnetic field and which can move about a rest position in a vertical free space. The coil(s) is wound around and fixed to a mandrel and a return member... | 02/07/2012 |
| 8094867 | 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 vo... | 01/10/2012 |
| 8050445 | Microspeaker and method of designing the same Provided are a microspeaker and a method of designing the same. The microspeaker includes a first permanent magnet and a second permanent magnet disposed on the first permanent magnet with a predetermined gap therebetween, the first and second permanent magnets havi... | 11/01/2011 |
| 8008813 | Systems and methods for an improved linear motor An improved linear motor is provided useful in conjunction with audio equipment for reduced distortion audio output at high voice coil displacements. The improved linear motor may include a yoke, a gap plate which forms an air gap with the yoke, magnets coupled to t... | 08/30/2011 |
| 7957551 | Loudspeaker A loudspeaker includes the following components: a frame (5) that has a magnetic circuit (4) including a magnetic gap (4a) therein; and a diaphragm (6) that is bonded to a voice coil (7) fitted into the magnetic gap (4 | 06/07/2011 |
| 7894623 | 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 ma... | 02/22/2011 |
| 7873180 | Voice coil actuator Provided herein is a voice-coil motor that includes a magnetic field having at least two displaced regions of higher intensity separated by a region of lesser intensity and a counter-coil disposed within the region of lesser intensity. ... | 01/18/2011 |
| 7778436 | Vibration-sound generating device and yoke thereof A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastic... | 08/17/2010 |
| 7715585 | Speaker In the speaker of the invention, a circular outer magnet type magnetic circuit 8, and a diaphragm 13 to which a circular voice coil 14 driven by the circuit is fixed are held on a rectangular frame 1. The circular outer magnet type magnet... | 05/11/2010 |
| 7593540 | Electroacoustic transducer and magnetic circuit unit An electroacoustic transducer has a magnetic circuit unit including a plate-shaped yoke, first and second magnets juxtaposed on the yoke, and first and second top plates mounted on the respective tops of the first and second magnets. One end of the first magnet is m... | 09/22/2009 |
| 7570779 | Speaker In a speaker having a magnet circuit causing vibrations of a diaphragm and attached to and supported on a frame, a plurality of projections is formed on a bottom portion of the frame supporting the magnetic circuit. The projections are in point contact with a rear-f... | 08/04/2009 |
| 7532736 | Speaker A speaker including a frame, a diaphragm fixed to the frame through a first edge, a voice coil, a magnetic circuit, and a suspension holder fixed to the frame through a second edge is disclosed. The first and the second edges are spaced apart, and substantially symm... | 05/12/2009 |
| 7499563 | Speaker device In a speaker device, when an excessive driving signal larger than a withstand input is inputted to a voice coil, a voice coil bobbin moves with large magnitude. When the voice coil bobbin largely moves on a side opposite to a sound emitting side (downward), each com... | 03/03/2009 |
| 7443995 | Acoustic loudspeaker An acoustic driver has a voice coil in which adjacent turns of the coil are spaced apart. The driver is placed at one end of a foam-lined, elongated structure, such as a tube. An opposing end of the structure is, in one embodiment, enclosed by a wall that is connect... | 10/28/2008 |
| 7433487 | Speaker A speaker includes a magnet, a yoke, and a coil. A surface of the magnet opposed to the yoke includes a first magnetized surface at one side in the moving direction of the coil and a second magnetized surface at the other side in the moving direction of the coil. Th... | 10/07/2008 |
| 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 |
| 7400740 | Core cap for loudspeaker A core cap or top plate for use with loudspeakers that includes offset adhesive control grooves on the opposite faces of the disk-like core cap is disclosed. The grooves are offset from one another by a distance that makes the smallest dimension between any feature ... | 07/15/2008 |
| 7388964 | Loudspeaker, and module and electronic apparatus using the loudspeaker A loudspeaker is provided that satisfies requirements for both a small size and a high sound pressure. In addition, the heat capacity of the magnetic circuit and the heat dissipation of the voice coil are improved in this loudspeaker. Using at least two pieces of ba... | 06/17/2008 |
| 7386144 | Inertial voice type coil actuator The present invention provides an intertial-type voice actuator that includes a magnetic flux conductive material core with a continuous channel. The channel has antifringing groove. The actuator employs a radially polarized cylindrical magnet spaced in the channel ... | 06/10/2008 |
| 7382893 | Loudspeaker with inverted cone The movable structure of a loudspeaker is configured to include a bridging element that connects the base of a diaphragm to an electromagnetic actuator. The bridging element extends radially with respect to the translation axis of the actuator and secures the diaphr... | 06/03/2008 |
| 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 |
| 7360626 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 04/22/2008 |
| 7350287 | Voice coil insertion jig, speaker producing method using the jig, and speaker produced by using the jig A method of manufacturing a speaker using a voice coil insertion jig including providing a voice coil insertion jig, deforming a plurality of moving pieces from a first position elastically toward a central boss side to a second position, inserting the voice coil in... | 04/01/2008 |
| 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 |
| 7324658 | Speaker A speaker includes a diaphragm having a central aperture at which a bobbin with a voice coil wound therearound is mounted, and mounted at the outer periphery thereof on a frame with an edge therebetween, and a magnetic circuit section that has a magnetic gap in whic... | 01/29/2008 |
| 7321664 | Receiver having an improved bobbin A receiver is disclosed for use in listening devices, such as hearing aids. The receiver comprises an electromagnetic drive assembly that includes a bobbin having a coil of conductive wire formed thereon. The bobbin is capable of compensating for the deflections on ... | 01/22/2008 |
| 7319771 | Vibrator for bone conducted hearing aids A vibrator for a bone conduction type hearing aid device. The vibrator includes a coil for generating a dynamic magnetic field and two permanent magnets for generating a static magnetic field. The two permanent magnets are working independently from each other in th... | 01/15/2008 |
| 7301764 | Electronic device with audio capability A speaker module is disposed on the top casing and includes at least one first vent. A printed circuit board is disposed between the top casing and the bottom casing and includes at least one second vent corresponding to the first vent. ... | 11/27/2007 |
| 7302077 | Electromagnetic driver for a planar diaphragm loudspeaker The invention relates to an electromagnetic driver comprising a soft magnetic core in the form of an E with three legs and a back, an alternating field driver, magnetically coupled to the soft magnetic core, for generating an alternating magnetic field in the soft m... | 11/27/2007 |
| 7302076 | Low profile speaker and system A speaker has a magnet structure mounted ahead of the speaker diaphragm to produce a shallow compact unit. The magnet structure defines a flux gap, and a voice coil residing in the flux gap is connected to a main diaphragm such that drive current applied to the voic... | 11/27/2007 |
| 7289642 | Audio speaker An audio speaker has a T-yoke, a solenoid, a voice coil, a cone paper, a magnet, a gasket, a basket, a terminal, a damper and a wire. The T-yoke has a bottom disk and a pole formed on the bottom disk. The solenoid and the voice coil are mounted on the pole. The cone... | 10/30/2007 |
| 7283642 | Moving-coil electrodynamic motor for a loudspeaker, loudspeaker and pole piece The invention relates to a moving-coil electrodynamic motor and a loudspeaker. A moving-coil includes a winding with a given number of turns. A motor comprises a magnet arranged between a front pole piece and a rear pole piece. The front pole piece and the rear pole... | 10/16/2007 |
| 7278200 | Method of tensioning a diaphragm for an electro-dynamic loudspeaker Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor th... | 10/09/2007 |
| 7277555 | Electroacoustic transducer with built in transducer circuit In an electroacoustic transducer (1), an annular shaped magnet system (14) is provided, enclosing an inner space (22), in which inner space (22) an integrated circuit (31) is accommodated, with the aid of which integrated circuit (... | 10/02/2007 |
| 7272238 | Loudspeaker having cooling system A loudspeaker has a cooling system in which a pole piece has a shorting ring made of non-magnetic conductive material that stabilizes magnetic field to reduce distortion of sound and a heat dissipation plate that couples to the shorting ring to facilitate efficient ... | 09/18/2007 |
| 7266214 | Audio speaker and method for assembling an audio speaker An audio speaker includes a driver unit having a magnetic pole case defining a radial gap, a vibration system having a diaphragm and a voice coil where the vibration system is fixed to the drive unit and the voice coil is movably mounted into the radial gap, and a r... | 09/04/2007 |
| 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 |
| 7246425 | Method of manufacturing a speaker In manufacturing a speaker, ultrasonic complex vibration welding is applied at least to: a process of fixedly putting together a magnet, a pot yoke a the pole piece; a process of fixing, to a portion of an inner circumference of a frame, an outer periphery of a spid... | 07/24/2007 |
| 7248714 | Micro-speaker and method for assembling a micro-speaker The micro-speaker includes a driver unit having a housing, a magnet disposed within the housing forming a radial gap between the magnet and the circumferential walls of the housing, and a magnetic plate disposed on the magnet, a vibration system having a diaphragm a... | 07/24/2007 |
