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| Number | Title | Issue Date |
| 8139815 | Damper of rectangular-shaped slim speaker The present invention relates to a damper of a rectangular-shaped slim speaker that is capable of preventing a vibration plate having an entire outer appearance of a slim oval/track-like shape extended to any one side thereof from being moved in forward and backward... | 03/20/2012 |
| 7734056 | Damper structure of preventing irregular vibration for speaker A damper structure for a speaker is provided to preventing irregular vibrations, and the improvements comprises the damper having one or more elastic reinforcing pieces attached with a corrugated surface of the damper. The reinforcing pieces may be of smaller annula... | 06/08/2010 |
| 7706562 | Corrugated damper for speaker A corrugated damper for a speaker has a plurality of alternating concentric peaks and valleys formed on a surface thereof and a plurality of ribs installed on the valleys in such a way that both ends of the ribs are connected between their respective two adjacent pe... | 04/27/2010 |
| 7587060 | Speaker device In a speaker device, each inner peripheral edge portion of a conductive damper and an ordinary damper is fixed to an area in the vicinity of a lower end of a cylindrical portion of a connecting member, and each outer peripheral edge portion of them is fixed to a sup... | 09/08/2009 |
| 7403632 | Audio speaker utilizing an unanchored magnet for primary force generation A speaker apparatus has a container holding a volume of ferrofluid, a permanent magnet suspended in the ferrofluid, and a magnetic excitation apparatus proximate the container. Operation of the excitation apparatus causes movement of the permanent magnet, translated... | 07/22/2008 |
| 7224817 | Loudspeaker A loudspeaker of the present invention includes a diaphragm; a voice coil for driving the diaphragm; and a magnetic circuit including a yoke, a magnet provided on the yoke, and an upper plate provided on the magnet, for producing a magnet field that is perpendicular... | 05/29/2007 |
| 7181038 | Electro-acoustic transducer An electro-acoustic transducer for driving a large surface is used to convert electrical signals into sound. The transducer has a housing with a cast aluminum bottom and a molded plastic top. The top and bottom are fastened together by screws with a gasket in betwee... | 02/20/2007 |
| 7130441 | Speaker system having processing circuitry A weight is attached to the rear side of a magnetic circuit of a speaker unit. The tip of a boss that projects from the front side of the weight is joined to the rear side of a center pole of the magnetic circuit with a bolt. Even if reactive force that is generated... | 10/31/2006 |
| 7110564 | Multi-function actuator Disclosed is a multi-function actuator comprising: a case having an internal space; a vibrating coil installed in the case for generating vibration; a diaphragm for generating sound with an outer end being fixed to the upper end of the case; a voice coil fixedly ins... | 09/19/2006 |
| 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 |
| 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 magnetic circuit with a bolt. Even if reactive force that is generated... | 07/25/2006 |
| 7076079 | Multi-functional actuator Disclosed is a multi-functional actuator comprising: a housing having an internal space and a groove in the inner side; a sound-generating diaphragm with an outer end fixed to the upper end of said housing; a voice coil fixed to the bottom of said diaphragm; a verti... | 07/11/2006 |
| 7035419 | Anti-resonant structure for speakers An anti-resonant structure for speakers includes a resonant structure which has a housing compartment, at least one elastic element located in the housing compartment that has one end fastening to the resonant structure and another end coupling with a speaker, and a... | 04/25/2006 |
| 6968071 | Speaker having magnetic member installed on diaphragm The present invention relates a speaker having a diaphragm around the rim of a frame on the speaker for disposing a magnetic member at the center of the diaphragm along the direction of a resonant space enclosed by the diaphragm and the frame. When a winding in the ... | 11/22/2005 |
| 6944311 | Speaker for vehicle A speaker for vehicle has a weight mounted on the backside of a magnetic circuit of a speaker unit. The weight includes a weighting part having a shape in which the thickness in an axial line of the speaker unit is made small and the diameter in a direction perpendi... | 09/13/2005 |
| 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 voice coil located in the magnetic gap, a voice coil bobbin having the... | 07/05/2005 |
| 6810126 | Planar magnetic transducer A panel transducer includes a diaphragm with areas of multiple electrical conductors, two rows of magnetic bars, two metal plates and a clamping frame. The diaphragm is clamped in the clamping frame and is positioned between the two rows of magnetic bars. Each row o... | 10/26/2004 |
| 6738490 | Loudspeaker with independent magnetic dampening and excursion control A loudspeaker with independent magnetic dampening and excursion control includes at least two magnets for dampening the axial movement of a voice coil. The dampening magnets substantially reduce/prevent fatigue of the component parts of the loudspeaker and detriment... | 05/18/2004 |
| 6654477 | Receiver and method of construction A receiver for converting electrical energy to acoustical energy, and a method of manufacturing the receiver, are disclosed. The receiver comprises an armature having a peripheral edge, a magnet stack and a weld joint for attaching the armature to the mag... | 11/25/2003 |
| 6574346 | Bass reproduction speaker apparatus Negative stiffness is generated for a vibration system of a speaker unit by using a movable magnet attached to the vibration system of the speaker unit and also a ring-like stationary magnet arranged coaxially at the outer radius thereof in order to incre... | 06/03/2003 |
| 6539097 | Multi-functional vibration actuator A multi-functional vibration actuator comprises a vibration transmitting portion (8) forming a peripheral portion thereof, a magnetic circuit formed by a yoke (1), a permanent magnet (2), and a plate (3), a vibrator member (5) arranged at a distance from ... | 03/25/2003 |
| 6466682 | Vibration speaker Disclosed is a vibration speaker capable of transferring a stable vibratory force to a set including the vibration speaker for eliminating a touch sound of a vibrating mass and generating a minimum vibrating force during vibration by expanding inputted fr... | 10/15/2002 |
| 6385327 | Device having two coaxially disposed bodies which are movable relative to one another along a translation axis A device including two bodies (3, 5) which are disposed coaxially with respect to a translation axis (1), and including a comparatively compact suspension via which at least one of the bodies is movable with respect to the other body along the translation... | 05/07/2002 |
| 6192136 | Inertial vibration transducers An inertial vibration transducer (9) characterised by a motor coil assembly comprising a tubular member (18) and a coil (13) rigidly fixed to the tubular member, and by a magnet assembly (15) disposed concentrically within the motor coil, and resilient me... | 02/20/2001 |
| 6041131 | Shock resistant electroacoustic transducer The present invention relates to a hearing aid receiver (10) having a coil (12) with a tunnel (14) therethrough, a magnetic structure (16) having a central magnetic gap (18), an armature (20), and a fluid (30, 32) with a viscosity greater than air to prov... | 03/21/2000 |
| 5923769 | Electroacoustic transducer The invention provides an electroacoustic transducer wherein the resonant chamber is given a space and volume necessary for resonance and the vibration system is given an efficient air damping effect and thereby undesired vibrations are suppressed with th... | 07/13/1999 |
| 5878150 | Damper for a loudspeaker and a method for producing the same A damper for a loud speaker is produced by molding a substrate into a desired shape in which a fabric or knitted cloth composed of core-sheath type conjugate fibers composed of filaments having a core-sheath type structure is used as the substrate. A resi... | 03/02/1999 |
| 5862242 | Speaker A speaker has a diaphragm of which plane shape as seen from a vibrating direction has a major axis and a minor axis, a band-shaped edge connected to the outer circumference of the diaphragm for holding so that the diaphragm may be free to vibrate, and a f... | 01/19/1999 |
| 5003610 | Whole surface driven speaker A whole surface driven speaker includes a diaphragm of an insulating plastic sheet carrying a conductor coil pattern. A foamed mica plate is bonded to the diaphragm. Two groups of permanent magnets are arranged on both sides of the diaphragm and oppose ea... | 03/26/1991 |
| 4354067 | Audio-band electromechanical vibration converter Audio-band electromechanical vibration converter characterized in that a yoke having a magnetic pole and a magnetic gap formed therein is displaceably housed by a damper in a casing to which a vibration plate is attached; a coil attached to the casing is ... | 10/12/1982 |
| 3956599 | Dome loudspeaker A dome loudspeaker including a yoke assembly consisting of a flat plate having an opening and a U-shaped member having its arm ends secured to the flat plate, a cylindrical magnet being secured to the cross arm of the U-shaped member adhesively, the cavit... | 05/11/1976 |
